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_EXTENDED_IREF (1ULL << 6)
458 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
459 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
462 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
463 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
464 #define BTRFS_FEATURE_INCOMPAT_SUPP \
465 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
466 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
467 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
468 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
469 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
470 BTRFS_FEATURE_INCOMPAT_RAID56 | \
471 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
472 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
475 * A leaf is full of items. offset and size tell us where to find
476 * the item in the leaf (relative to the start of the data area)
479 struct btrfs_disk_key key;
482 } __attribute__ ((__packed__));
485 * leaves have an item area and a data area:
486 * [item0, item1....itemN] [free space] [dataN...data1, data0]
488 * The data is separate from the items to get the keys closer together
492 struct btrfs_header header;
493 struct btrfs_item items[];
494 } __attribute__ ((__packed__));
497 * all non-leaf blocks are nodes, they hold only keys and pointers to
500 struct btrfs_key_ptr {
501 struct btrfs_disk_key key;
504 } __attribute__ ((__packed__));
507 struct btrfs_header header;
508 struct btrfs_key_ptr ptrs[];
509 } __attribute__ ((__packed__));
512 * btrfs_paths remember the path taken from the root down to the leaf.
513 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
514 * to any other levels that are present.
516 * The slots array records the index of the item or block pointer
517 * used while walking the tree.
521 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
522 int slots[BTRFS_MAX_LEVEL];
523 /* if there is real range locking, this locks field will change */
524 int locks[BTRFS_MAX_LEVEL];
526 /* keep some upper locks as we walk down */
530 * set by btrfs_split_item, tells search_slot to keep all locks
531 * and to force calls to keep space in the nodes
533 unsigned int search_for_split:1;
534 unsigned int keep_locks:1;
535 unsigned int skip_locking:1;
536 unsigned int leave_spinning:1;
540 * items in the extent btree are used to record the objectid of the
541 * owner of the block and the number of references
544 struct btrfs_extent_item {
548 } __attribute__ ((__packed__));
550 struct btrfs_extent_item_v0 {
552 } __attribute__ ((__packed__));
554 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
555 sizeof(struct btrfs_item))
557 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
558 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
560 /* following flags only apply to tree blocks */
562 /* use full backrefs for extent pointers in the block*/
563 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
565 struct btrfs_tree_block_info {
566 struct btrfs_disk_key key;
568 } __attribute__ ((__packed__));
570 struct btrfs_extent_data_ref {
575 } __attribute__ ((__packed__));
577 struct btrfs_shared_data_ref {
579 } __attribute__ ((__packed__));
581 struct btrfs_extent_inline_ref {
584 } __attribute__ ((__packed__));
586 struct btrfs_extent_ref_v0 {
591 } __attribute__ ((__packed__));
593 /* dev extents record free space on individual devices. The owner
594 * field points back to the chunk allocation mapping tree that allocated
595 * the extent. The chunk tree uuid field is a way to double check the owner
597 struct btrfs_dev_extent {
599 __le64 chunk_objectid;
602 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
603 } __attribute__ ((__packed__));
605 struct btrfs_inode_ref {
609 } __attribute__ ((__packed__));
611 struct btrfs_inode_extref {
612 __le64 parent_objectid;
615 __u8 name[0]; /* name goes here */
616 } __attribute__ ((__packed__));
618 struct btrfs_timespec {
621 } __attribute__ ((__packed__));
624 BTRFS_COMPRESS_NONE = 0,
625 BTRFS_COMPRESS_ZLIB = 1,
626 BTRFS_COMPRESS_LZO = 2,
627 BTRFS_COMPRESS_TYPES = 2,
628 BTRFS_COMPRESS_LAST = 3,
629 } btrfs_compression_type;
631 /* we don't understand any encryption methods right now */
633 BTRFS_ENCRYPTION_NONE = 0,
634 BTRFS_ENCRYPTION_LAST = 1,
635 } btrfs_encryption_type;
637 struct btrfs_inode_item {
638 /* nfs style generation number */
640 /* transid that last touched this inode */
652 /* modification sequence number for NFS */
656 * a little future expansion, for more than this we can
657 * just grow the inode item and version it
660 struct btrfs_timespec atime;
661 struct btrfs_timespec ctime;
662 struct btrfs_timespec mtime;
663 struct btrfs_timespec otime;
664 } __attribute__ ((__packed__));
666 struct btrfs_dir_log_item {
668 } __attribute__ ((__packed__));
670 struct btrfs_dir_item {
671 struct btrfs_disk_key location;
676 } __attribute__ ((__packed__));
678 struct btrfs_root_item_v0 {
679 struct btrfs_inode_item inode;
685 __le64 last_snapshot;
688 struct btrfs_disk_key drop_progress;
691 } __attribute__ ((__packed__));
693 struct btrfs_root_item {
694 struct btrfs_inode_item inode;
700 __le64 last_snapshot;
703 struct btrfs_disk_key drop_progress;
708 * The following fields appear after subvol_uuids+subvol_times
713 * This generation number is used to test if the new fields are valid
714 * and up to date while reading the root item. Everytime the root item
715 * is written out, the "generation" field is copied into this field. If
716 * anyone ever mounted the fs with an older kernel, we will have
717 * mismatching generation values here and thus must invalidate the
718 * new fields. See btrfs_update_root and btrfs_find_last_root for
720 * the offset of generation_v2 is also used as the start for the memset
721 * when invalidating the fields.
723 __le64 generation_v2;
724 u8 uuid[BTRFS_UUID_SIZE];
725 u8 parent_uuid[BTRFS_UUID_SIZE];
726 u8 received_uuid[BTRFS_UUID_SIZE];
727 __le64 ctransid; /* updated when an inode changes */
728 __le64 otransid; /* trans when created */
729 __le64 stransid; /* trans when sent. non-zero for received subvol */
730 __le64 rtransid; /* trans when received. non-zero for received subvol */
731 struct btrfs_timespec ctime;
732 struct btrfs_timespec otime;
733 struct btrfs_timespec stime;
734 struct btrfs_timespec rtime;
735 __le64 reserved[8]; /* for future */
736 } __attribute__ ((__packed__));
739 * this is used for both forward and backward root refs
741 struct btrfs_root_ref {
745 } __attribute__ ((__packed__));
747 #define BTRFS_FILE_EXTENT_INLINE 0
748 #define BTRFS_FILE_EXTENT_REG 1
749 #define BTRFS_FILE_EXTENT_PREALLOC 2
751 struct btrfs_file_extent_item {
753 * transaction id that created this extent
757 * max number of bytes to hold this extent in ram
758 * when we split a compressed extent we can't know how big
759 * each of the resulting pieces will be. So, this is
760 * an upper limit on the size of the extent in ram instead of
766 * 32 bits for the various ways we might encode the data,
767 * including compression and encryption. If any of these
768 * are set to something a given disk format doesn't understand
769 * it is treated like an incompat flag for reading and writing,
774 __le16 other_encoding; /* spare for later use */
776 /* are we inline data or a real extent? */
780 * disk space consumed by the extent, checksum blocks are included
784 __le64 disk_num_bytes;
786 * the logical offset in file blocks (no csums)
787 * this extent record is for. This allows a file extent to point
788 * into the middle of an existing extent on disk, sharing it
789 * between two snapshots (useful if some bytes in the middle of the
790 * extent have changed
794 * the logical number of file blocks (no csums included)
798 } __attribute__ ((__packed__));
800 struct btrfs_csum_item {
802 } __attribute__ ((__packed__));
804 /* tag for the radix tree of block groups in ram */
805 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
806 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
807 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
808 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
809 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
810 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
811 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
812 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
813 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
814 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
816 /* used in struct btrfs_balance_args fields */
817 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
819 #define BTRFS_QGROUP_STATUS_OFF 0
820 #define BTRFS_QGROUP_STATUS_ON 1
821 #define BTRFS_QGROUP_STATUS_SCANNING 2
823 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1 << 0)
825 struct btrfs_qgroup_status_item {
829 __le64 scan; /* progress during scanning */
830 } __attribute__ ((__packed__));
832 struct btrfs_block_group_item {
834 __le64 chunk_objectid;
836 } __attribute__ ((__packed__));
838 struct btrfs_qgroup_info_item {
841 __le64 referenced_compressed;
843 __le64 exclusive_compressed;
844 } __attribute__ ((__packed__));
846 /* flags definition for qgroup limits */
847 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
848 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
849 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
850 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
851 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
852 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
854 struct btrfs_qgroup_limit_item {
856 __le64 max_referenced;
857 __le64 max_exclusive;
858 __le64 rsv_referenced;
859 __le64 rsv_exclusive;
860 } __attribute__ ((__packed__));
862 struct btrfs_space_info {
868 struct list_head list;
871 struct btrfs_block_group_cache {
872 struct cache_extent cache;
873 struct btrfs_key key;
874 struct btrfs_block_group_item item;
875 struct btrfs_space_info *space_info;
882 struct btrfs_extent_ops {
883 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
884 u64 hint_byte, struct btrfs_key *ins);
885 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
890 struct btrfs_fs_devices;
891 struct btrfs_fs_info {
892 u8 fsid[BTRFS_FSID_SIZE];
893 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
894 struct btrfs_root *fs_root;
895 struct btrfs_root *extent_root;
896 struct btrfs_root *tree_root;
897 struct btrfs_root *chunk_root;
898 struct btrfs_root *dev_root;
899 struct btrfs_root *csum_root;
901 struct cache_tree fs_root_cache;
903 /* the log root tree is a directory of all the other log roots */
904 struct btrfs_root *log_root_tree;
906 struct extent_io_tree extent_cache;
907 struct extent_io_tree free_space_cache;
908 struct extent_io_tree block_group_cache;
909 struct extent_io_tree pinned_extents;
910 struct extent_io_tree pending_del;
911 struct extent_io_tree extent_ins;
913 /* logical->physical extent mapping */
914 struct btrfs_mapping_tree mapping_tree;
917 u64 last_trans_committed;
919 u64 avail_data_alloc_bits;
920 u64 avail_metadata_alloc_bits;
921 u64 avail_system_alloc_bits;
922 u64 data_alloc_profile;
923 u64 metadata_alloc_profile;
924 u64 system_alloc_profile;
927 struct btrfs_trans_handle *running_transaction;
928 struct btrfs_super_block *super_copy;
929 struct mutex fs_mutex;
934 struct btrfs_extent_ops *extent_ops;
935 struct list_head dirty_cowonly_roots;
937 struct btrfs_fs_devices *fs_devices;
938 struct list_head space_info;
941 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
942 struct btrfs_root *root,
943 u64 bytenr, u64 num_bytes, u64 parent,
944 u64 root_objectid, u64 owner, u64 offset,
946 struct cache_tree *fsck_extent_cache;
947 struct cache_tree *corrupt_blocks;
951 * in ram representation of the tree. extent_root is used for all allocations
952 * and for the extent tree extent_root root.
955 struct extent_buffer *node;
956 struct extent_buffer *commit_root;
957 struct btrfs_root_item root_item;
958 struct btrfs_key root_key;
959 struct btrfs_fs_info *fs_info;
963 /* data allocations are done in sectorsize units */
966 /* node allocations are done in nodesize units */
969 /* leaf allocations are done in leafsize units */
972 /* leaf allocations are done in leafsize units */
981 u64 last_inode_alloc;
983 /* the dirty list is only used by non-reference counted roots */
984 struct list_head dirty_list;
985 struct cache_extent cache;
989 * inode items have the data typically returned from stat and store other
990 * info about object characteristics. There is one for every file and dir in
993 #define BTRFS_INODE_ITEM_KEY 1
994 #define BTRFS_INODE_REF_KEY 12
995 #define BTRFS_INODE_EXTREF_KEY 13
996 #define BTRFS_XATTR_ITEM_KEY 24
997 #define BTRFS_ORPHAN_ITEM_KEY 48
999 #define BTRFS_DIR_LOG_ITEM_KEY 60
1000 #define BTRFS_DIR_LOG_INDEX_KEY 72
1002 * dir items are the name -> inode pointers in a directory. There is one
1003 * for every name in a directory.
1005 #define BTRFS_DIR_ITEM_KEY 84
1006 #define BTRFS_DIR_INDEX_KEY 96
1009 * extent data is for file data
1011 #define BTRFS_EXTENT_DATA_KEY 108
1014 * csum items have the checksums for data in the extents
1016 #define BTRFS_CSUM_ITEM_KEY 120
1018 * extent csums are stored in a separate tree and hold csums for
1019 * an entire extent on disk.
1021 #define BTRFS_EXTENT_CSUM_KEY 128
1024 * root items point to tree roots. There are typically in the root
1025 * tree used by the super block to find all the other trees
1027 #define BTRFS_ROOT_ITEM_KEY 132
1030 * root backrefs tie subvols and snapshots to the directory entries that
1033 #define BTRFS_ROOT_BACKREF_KEY 144
1036 * root refs make a fast index for listing all of the snapshots and
1037 * subvolumes referenced by a given root. They point directly to the
1038 * directory item in the root that references the subvol
1040 #define BTRFS_ROOT_REF_KEY 156
1043 * extent items are in the extent map tree. These record which blocks
1044 * are used, and how many references there are to each block
1046 #define BTRFS_EXTENT_ITEM_KEY 168
1049 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1050 * the length, so we save the level in key->offset instead of the length.
1052 #define BTRFS_METADATA_ITEM_KEY 169
1054 #define BTRFS_TREE_BLOCK_REF_KEY 176
1056 #define BTRFS_EXTENT_DATA_REF_KEY 178
1058 /* old style extent backrefs */
1059 #define BTRFS_EXTENT_REF_V0_KEY 180
1061 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1063 #define BTRFS_SHARED_DATA_REF_KEY 184
1067 * block groups give us hints into the extent allocation trees. Which
1068 * blocks are free etc etc
1070 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1072 #define BTRFS_DEV_EXTENT_KEY 204
1073 #define BTRFS_DEV_ITEM_KEY 216
1074 #define BTRFS_CHUNK_ITEM_KEY 228
1076 #define BTRFS_BALANCE_ITEM_KEY 248
1081 #define BTRFS_QGROUP_STATUS_KEY 240
1082 #define BTRFS_QGROUP_INFO_KEY 242
1083 #define BTRFS_QGROUP_LIMIT_KEY 244
1084 #define BTRFS_QGROUP_RELATION_KEY 246
1087 * Persistently stores the io stats in the device tree.
1088 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1090 #define BTRFS_DEV_STATS_KEY 249
1093 * Persistently stores the device replace state in the device tree.
1094 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1096 #define BTRFS_DEV_REPLACE_KEY 250
1099 * string items are for debugging. They just store a short string of
1102 #define BTRFS_STRING_ITEM_KEY 253
1106 #define BTRFS_INODE_NODATASUM (1 << 0)
1107 #define BTRFS_INODE_NODATACOW (1 << 1)
1108 #define BTRFS_INODE_READONLY (1 << 2)
1110 #define read_eb_member(eb, ptr, type, member, result) ( \
1111 read_extent_buffer(eb, (char *)(result), \
1112 ((unsigned long)(ptr)) + \
1113 offsetof(type, member), \
1114 sizeof(((type *)0)->member)))
1116 #define write_eb_member(eb, ptr, type, member, result) ( \
1117 write_extent_buffer(eb, (char *)(result), \
1118 ((unsigned long)(ptr)) + \
1119 offsetof(type, member), \
1120 sizeof(((type *)0)->member)))
1122 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1123 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1125 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1126 return le##bits##_to_cpu(h->member); \
1128 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1131 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1132 h->member = cpu_to_le##bits(val); \
1135 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1136 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
1139 unsigned long offset = (unsigned long)s; \
1140 type *p = (type *) (eb->data + offset); \
1141 return get_unaligned_le##bits(&p->member); \
1143 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1144 type *s, u##bits val) \
1146 unsigned long offset = (unsigned long)s; \
1147 type *p = (type *) (eb->data + offset); \
1148 put_unaligned_le##bits(val, &p->member); \
1151 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1152 static inline u##bits btrfs_##name(type *s) \
1154 return le##bits##_to_cpu(s->member); \
1156 static inline void btrfs_set_##name(type *s, u##bits val) \
1158 s->member = cpu_to_le##bits(val); \
1161 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1162 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1163 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1164 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1165 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1166 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1168 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1169 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1170 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1171 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1172 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1173 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1175 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1176 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1178 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1180 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1182 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1184 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1186 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1187 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1189 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1191 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1193 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1196 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1198 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1201 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1203 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1206 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1207 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1208 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1209 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1210 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1211 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1212 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1213 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1214 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1215 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1216 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1218 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1220 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1223 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1224 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1225 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1227 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1229 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1231 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1233 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1234 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1236 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1238 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1239 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1241 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1244 unsigned long offset = (unsigned long)c;
1245 offset += offsetof(struct btrfs_chunk, stripe);
1246 offset += nr * sizeof(struct btrfs_stripe);
1247 return (struct btrfs_stripe *)offset;
1250 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1252 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1255 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1256 struct btrfs_chunk *c, int nr)
1258 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1261 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1262 struct btrfs_chunk *c, int nr,
1265 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1268 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1269 struct btrfs_chunk *c, int nr)
1271 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1274 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1275 struct btrfs_chunk *c, int nr,
1278 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1281 /* struct btrfs_block_group_item */
1282 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1284 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1286 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1287 struct btrfs_block_group_item, chunk_objectid, 64);
1289 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1290 struct btrfs_block_group_item, chunk_objectid, 64);
1291 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1292 struct btrfs_block_group_item, flags, 64);
1293 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1294 struct btrfs_block_group_item, flags, 64);
1296 /* struct btrfs_inode_ref */
1297 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1298 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1299 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1301 /* struct btrfs_inode_extref */
1302 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1303 parent_objectid, 64);
1304 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1306 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1308 /* struct btrfs_inode_item */
1309 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1310 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1311 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1312 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1313 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1314 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1315 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1316 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1317 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1318 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1319 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1320 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1322 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1323 struct btrfs_inode_item, generation, 64);
1324 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1325 struct btrfs_inode_item, generation, 64);
1326 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1327 struct btrfs_inode_item, size, 64);
1328 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1329 struct btrfs_inode_item, nbytes, 64);
1330 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1331 struct btrfs_inode_item, block_group, 64);
1332 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1333 struct btrfs_inode_item, nlink, 32);
1334 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1335 struct btrfs_inode_item, uid, 32);
1336 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1337 struct btrfs_inode_item, gid, 32);
1338 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1339 struct btrfs_inode_item, mode, 32);
1340 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1341 struct btrfs_inode_item, rdev, 64);
1342 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1343 struct btrfs_inode_item, flags, 64);
1345 static inline struct btrfs_timespec *
1346 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1348 unsigned long ptr = (unsigned long)inode_item;
1349 ptr += offsetof(struct btrfs_inode_item, atime);
1350 return (struct btrfs_timespec *)ptr;
1353 static inline struct btrfs_timespec *
1354 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1356 unsigned long ptr = (unsigned long)inode_item;
1357 ptr += offsetof(struct btrfs_inode_item, mtime);
1358 return (struct btrfs_timespec *)ptr;
1361 static inline struct btrfs_timespec *
1362 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1364 unsigned long ptr = (unsigned long)inode_item;
1365 ptr += offsetof(struct btrfs_inode_item, ctime);
1366 return (struct btrfs_timespec *)ptr;
1369 static inline struct btrfs_timespec *
1370 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1372 unsigned long ptr = (unsigned long)inode_item;
1373 ptr += offsetof(struct btrfs_inode_item, otime);
1374 return (struct btrfs_timespec *)ptr;
1377 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1378 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1379 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1381 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1384 /* struct btrfs_dev_extent */
1385 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1387 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1388 chunk_objectid, 64);
1389 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1391 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1393 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1395 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1396 return (u8 *)((unsigned long)dev + ptr);
1400 /* struct btrfs_extent_item */
1401 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1402 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1403 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1405 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1406 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1408 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1410 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1412 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1413 struct btrfs_tree_block_info *item,
1414 struct btrfs_disk_key *key)
1416 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1419 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1420 struct btrfs_tree_block_info *item,
1421 struct btrfs_disk_key *key)
1423 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1426 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1428 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1430 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1432 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1435 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1438 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1440 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1442 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1443 struct btrfs_extent_inline_ref, type, 8);
1444 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1445 struct btrfs_extent_inline_ref, offset, 64);
1447 static inline u32 btrfs_extent_inline_ref_size(int type)
1449 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1450 type == BTRFS_SHARED_BLOCK_REF_KEY)
1451 return sizeof(struct btrfs_extent_inline_ref);
1452 if (type == BTRFS_SHARED_DATA_REF_KEY)
1453 return sizeof(struct btrfs_shared_data_ref) +
1454 sizeof(struct btrfs_extent_inline_ref);
1455 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1456 return sizeof(struct btrfs_extent_data_ref) +
1457 offsetof(struct btrfs_extent_inline_ref, offset);
1462 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1463 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1465 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1466 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1468 /* struct btrfs_node */
1469 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1470 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1472 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1475 ptr = offsetof(struct btrfs_node, ptrs) +
1476 sizeof(struct btrfs_key_ptr) * nr;
1477 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1480 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1484 ptr = offsetof(struct btrfs_node, ptrs) +
1485 sizeof(struct btrfs_key_ptr) * nr;
1486 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1489 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1492 ptr = offsetof(struct btrfs_node, ptrs) +
1493 sizeof(struct btrfs_key_ptr) * nr;
1494 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1497 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1501 ptr = offsetof(struct btrfs_node, ptrs) +
1502 sizeof(struct btrfs_key_ptr) * nr;
1503 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1506 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1508 return offsetof(struct btrfs_node, ptrs) +
1509 sizeof(struct btrfs_key_ptr) * nr;
1512 static inline void btrfs_node_key(struct extent_buffer *eb,
1513 struct btrfs_disk_key *disk_key, int nr)
1516 ptr = btrfs_node_key_ptr_offset(nr);
1517 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1518 struct btrfs_key_ptr, key, disk_key);
1521 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1522 struct btrfs_disk_key *disk_key, int nr)
1525 ptr = btrfs_node_key_ptr_offset(nr);
1526 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1527 struct btrfs_key_ptr, key, disk_key);
1530 /* struct btrfs_item */
1531 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1532 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1534 static inline unsigned long btrfs_item_nr_offset(int nr)
1536 return offsetof(struct btrfs_leaf, items) +
1537 sizeof(struct btrfs_item) * nr;
1540 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1543 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1546 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1547 struct btrfs_item *item)
1549 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1552 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1554 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1557 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1559 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1562 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1564 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1567 static inline void btrfs_item_key(struct extent_buffer *eb,
1568 struct btrfs_disk_key *disk_key, int nr)
1570 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1571 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1574 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1575 struct btrfs_disk_key *disk_key, int nr)
1577 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1578 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1581 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1584 * struct btrfs_root_ref
1586 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1587 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1588 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1590 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1591 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1592 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1594 /* struct btrfs_dir_item */
1595 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1596 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1597 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1598 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1600 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1602 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1603 struct btrfs_dir_item *item,
1604 struct btrfs_disk_key *key)
1606 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1609 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1610 struct btrfs_dir_item *item,
1611 struct btrfs_disk_key *key)
1613 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1616 /* struct btrfs_free_space_header */
1617 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1619 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1621 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1624 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1625 struct btrfs_free_space_header *h,
1626 struct btrfs_disk_key *key)
1628 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1631 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1632 struct btrfs_free_space_header *h,
1633 struct btrfs_disk_key *key)
1635 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1638 /* struct btrfs_disk_key */
1639 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1641 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1642 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1644 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1645 struct btrfs_disk_key *disk)
1647 cpu->offset = le64_to_cpu(disk->offset);
1648 cpu->type = disk->type;
1649 cpu->objectid = le64_to_cpu(disk->objectid);
1652 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1653 struct btrfs_key *cpu)
1655 disk->offset = cpu_to_le64(cpu->offset);
1656 disk->type = cpu->type;
1657 disk->objectid = cpu_to_le64(cpu->objectid);
1660 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1661 struct btrfs_key *key, int nr)
1663 struct btrfs_disk_key disk_key;
1664 btrfs_node_key(eb, &disk_key, nr);
1665 btrfs_disk_key_to_cpu(key, &disk_key);
1668 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1669 struct btrfs_key *key, int nr)
1671 struct btrfs_disk_key disk_key;
1672 btrfs_item_key(eb, &disk_key, nr);
1673 btrfs_disk_key_to_cpu(key, &disk_key);
1676 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1677 struct btrfs_dir_item *item,
1678 struct btrfs_key *key)
1680 struct btrfs_disk_key disk_key;
1681 btrfs_dir_item_key(eb, item, &disk_key);
1682 btrfs_disk_key_to_cpu(key, &disk_key);
1686 static inline u8 btrfs_key_type(struct btrfs_key *key)
1691 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1696 /* struct btrfs_header */
1697 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1698 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1700 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1701 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1702 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1703 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1705 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1707 return (btrfs_header_flags(eb) & flag) == flag;
1710 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1712 u64 flags = btrfs_header_flags(eb);
1713 btrfs_set_header_flags(eb, flags | flag);
1714 return (flags & flag) == flag;
1717 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1719 u64 flags = btrfs_header_flags(eb);
1720 btrfs_set_header_flags(eb, flags & ~flag);
1721 return (flags & flag) == flag;
1724 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1726 u64 flags = btrfs_header_flags(eb);
1727 return flags >> BTRFS_BACKREF_REV_SHIFT;
1730 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1733 u64 flags = btrfs_header_flags(eb);
1734 flags &= ~BTRFS_BACKREF_REV_MASK;
1735 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1736 btrfs_set_header_flags(eb, flags);
1739 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1741 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1745 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1747 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1751 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1753 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1757 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1759 unsigned long ptr = offsetof(struct btrfs_header, csum);
1763 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1768 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1773 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1778 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1780 return (btrfs_header_level(eb) == 0);
1783 /* struct btrfs_root_item */
1784 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1786 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1787 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1788 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1790 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1792 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1793 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1794 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1795 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1796 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1797 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1798 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1799 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1801 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1803 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1805 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1807 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1809 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1812 /* struct btrfs_root_backup */
1813 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1815 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1817 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1818 tree_root_level, 8);
1820 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1822 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1823 chunk_root_gen, 64);
1824 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1825 chunk_root_level, 8);
1827 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1829 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1830 extent_root_gen, 64);
1831 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1832 extent_root_level, 8);
1834 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1836 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1838 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1841 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1843 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1845 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1848 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1850 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1852 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1853 csum_root_level, 8);
1854 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1856 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1858 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1861 /* struct btrfs_super_block */
1863 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1864 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1865 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1867 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1868 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1869 struct btrfs_super_block, sys_chunk_array_size, 32);
1870 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1871 struct btrfs_super_block, chunk_root_generation, 64);
1872 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1874 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1876 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1877 chunk_root_level, 8);
1878 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1880 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1881 log_root_transid, 64);
1882 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1884 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1886 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1888 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1890 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1892 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1894 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1896 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1897 root_dir_objectid, 64);
1898 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1900 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1902 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1904 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1905 incompat_flags, 64);
1906 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1908 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1909 cache_generation, 64);
1911 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1913 int t = btrfs_super_csum_type(s);
1914 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1915 return btrfs_csum_sizes[t];
1918 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1920 return offsetof(struct btrfs_leaf, items);
1923 /* struct btrfs_file_extent_item */
1924 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1925 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
1927 static inline unsigned long btrfs_file_extent_inline_start(struct
1928 btrfs_file_extent_item *e)
1930 unsigned long offset = (unsigned long)e;
1931 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1935 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1937 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1940 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1942 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
1944 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1946 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
1948 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1949 disk_num_bytes, 64);
1950 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1952 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
1954 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1956 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
1958 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1960 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
1962 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1964 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
1966 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1968 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1969 other_encoding, 16);
1971 /* btrfs_qgroup_status_item */
1972 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
1974 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
1976 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
1978 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
1981 /* btrfs_qgroup_info_item */
1982 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
1984 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
1986 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
1987 struct btrfs_qgroup_info_item, referenced_compressed, 64);
1988 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
1990 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
1991 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
1993 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
1994 struct btrfs_qgroup_info_item, generation, 64);
1995 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
1996 struct btrfs_qgroup_info_item, referenced, 64);
1997 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
1998 struct btrfs_qgroup_info_item, referenced_compressed, 64);
1999 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2000 struct btrfs_qgroup_info_item, exclusive, 64);
2001 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2002 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2004 /* btrfs_qgroup_limit_item */
2005 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2007 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2008 max_referenced, 64);
2009 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2011 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2012 rsv_referenced, 64);
2013 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2016 /* this returns the number of file bytes represented by the inline item.
2017 * If an item is compressed, this is the uncompressed size
2019 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2020 struct btrfs_file_extent_item *e)
2022 return btrfs_file_extent_ram_bytes(eb, e);
2026 * this returns the number of bytes used by the item on disk, minus the
2027 * size of any extent headers. If a file is compressed on disk, this is
2028 * the compressed size
2030 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2031 struct btrfs_item *e)
2033 unsigned long offset;
2034 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2035 return btrfs_item_size(eb, e) - offset;
2038 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2040 return root->leafsize;
2041 return root->nodesize;
2044 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2046 struct btrfs_super_block *disk_super;
2047 disk_super = &fs_info->super_copy;
2048 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2051 /* helper function to cast into the data area of the leaf. */
2052 #define btrfs_item_ptr(leaf, slot, type) \
2053 ((type *)(btrfs_leaf_data(leaf) + \
2054 btrfs_item_offset_nr(leaf, slot)))
2056 #define btrfs_item_ptr_offset(leaf, slot) \
2057 ((unsigned long)(btrfs_leaf_data(leaf) + \
2058 btrfs_item_offset_nr(leaf, slot)))
2061 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2062 struct btrfs_root *root);
2063 int btrfs_check_block_accounting(struct btrfs_root *root);
2064 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2065 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2066 struct btrfs_root *root);
2067 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
2068 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2069 btrfs_fs_info *info,
2071 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
2072 struct btrfs_block_group_cache
2073 *hint, u64 search_start,
2074 int data, int owner);
2075 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2076 struct btrfs_root *root,
2077 u32 blocksize, u64 root_objectid,
2078 struct btrfs_disk_key *key, int level,
2079 u64 hint, u64 empty_size);
2080 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2081 struct btrfs_root *root,
2082 u64 num_bytes, u64 parent,
2083 u64 root_objectid, u64 ref_generation,
2084 u64 owner, u64 empty_size, u64 hint_byte,
2085 u64 search_end, struct btrfs_key *ins, int data);
2086 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2087 struct btrfs_root *root, u64 bytenr,
2088 u64 offset, int metadata, u64 *refs, u64 *flags);
2089 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2090 struct btrfs_root *root,
2091 u64 bytenr, int level, u64 flags);
2092 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2093 struct extent_buffer *buf, int record_parent);
2094 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2095 struct extent_buffer *buf, int record_parent);
2096 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2097 struct btrfs_root *root,
2098 u64 bytenr, u64 num_bytes, u64 parent,
2099 u64 root_objectid, u64 owner, u64 offset);
2100 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2101 struct btrfs_root *root,
2102 struct extent_io_tree *unpin);
2103 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2104 struct btrfs_root *root,
2105 u64 bytenr, u64 num_bytes, u64 parent,
2106 u64 root_objectid, u64 ref_generation,
2107 u64 owner_objectid);
2108 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2109 struct btrfs_root *root, u64 bytenr,
2110 u64 orig_parent, u64 parent,
2111 u64 root_objectid, u64 ref_generation,
2112 u64 owner_objectid);
2113 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2114 struct btrfs_root *root);
2115 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2116 int btrfs_read_block_groups(struct btrfs_root *root);
2117 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2118 struct btrfs_root *root, u64 bytes_used,
2119 u64 type, u64 chunk_objectid, u64 chunk_offset,
2121 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2122 struct btrfs_root *root);
2123 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2124 struct btrfs_root *root, u64 bytenr, u64 num,
2125 int alloc, int mark_free);
2127 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2128 struct btrfs_path *path, int level, int slot);
2129 int btrfs_check_node(struct btrfs_root *root,
2130 struct btrfs_disk_key *parent_key,
2131 struct extent_buffer *buf);
2132 int btrfs_check_leaf(struct btrfs_root *root,
2133 struct btrfs_disk_key *parent_key,
2134 struct extent_buffer *buf);
2135 int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans,
2136 struct btrfs_root *root);
2137 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2138 int level, int slot, u64 objectid);
2139 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2140 struct extent_buffer *parent, int slot);
2141 int btrfs_previous_item(struct btrfs_root *root,
2142 struct btrfs_path *path, u64 min_objectid,
2144 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
2145 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2146 struct btrfs_root *root, struct extent_buffer *buf,
2147 struct extent_buffer *parent, int parent_slot,
2148 struct extent_buffer **cow_ret);
2149 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2150 struct btrfs_root *root,
2151 struct extent_buffer *buf,
2152 struct extent_buffer *parent, int parent_slot,
2153 struct extent_buffer **cow_ret,
2154 u64 search_start, u64 empty_size);
2155 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2156 struct btrfs_root *root,
2157 struct extent_buffer *buf,
2158 struct extent_buffer **cow_ret, u64 new_root_objectid);
2159 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2160 *root, struct btrfs_path *path, u32 data_size);
2161 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2162 struct btrfs_root *root,
2163 struct btrfs_path *path,
2164 u32 new_size, int from_end);
2165 int btrfs_split_item(struct btrfs_trans_handle *trans,
2166 struct btrfs_root *root,
2167 struct btrfs_path *path,
2168 struct btrfs_key *new_key,
2169 unsigned long split_offset);
2170 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2171 *root, struct btrfs_key *key, struct btrfs_path *p, int
2173 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2174 struct btrfs_root *root, struct extent_buffer *parent,
2175 int start_slot, int cache_only, u64 *last_ret,
2176 struct btrfs_key *progress);
2177 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
2178 struct btrfs_path *btrfs_alloc_path(void);
2179 void btrfs_free_path(struct btrfs_path *p);
2180 void btrfs_init_path(struct btrfs_path *p);
2181 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2182 struct btrfs_path *path, int slot, int nr);
2184 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2185 struct btrfs_root *root,
2186 struct btrfs_path *path)
2188 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2191 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2192 *root, struct btrfs_key *key, void *data, u32 data_size);
2193 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2194 struct btrfs_root *root,
2195 struct btrfs_path *path,
2196 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2198 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2199 struct btrfs_root *root,
2200 struct btrfs_path *path,
2201 struct btrfs_key *key,
2204 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2207 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2208 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2209 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2210 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
2212 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2213 struct btrfs_root *root, struct btrfs_path *path,
2214 struct btrfs_key *new_key);
2217 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2218 struct btrfs_root *tree_root,
2219 u64 root_id, u8 type, u64 ref_id,
2220 u64 dirid, u64 sequence,
2221 const char *name, int name_len);
2222 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2223 struct btrfs_key *key);
2224 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2225 *root, struct btrfs_key *key, struct btrfs_root_item
2227 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2228 *root, struct btrfs_key *key, struct btrfs_root_item
2230 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2231 btrfs_root_item *item, struct btrfs_key *key);
2232 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
2233 struct btrfs_root *latest_root);
2235 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2236 *root, const char *name, int name_len, u64 dir,
2237 struct btrfs_key *location, u8 type, u64 index);
2238 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2239 struct btrfs_root *root,
2240 struct btrfs_path *path, u64 dir,
2241 const char *name, int name_len,
2243 struct btrfs_dir_item *
2244 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2245 struct btrfs_root *root,
2246 struct btrfs_path *path, u64 dir,
2247 u64 objectid, const char *name, int name_len,
2249 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2250 struct btrfs_path *path,
2251 const char *name, int name_len);
2252 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2253 struct btrfs_root *root,
2254 struct btrfs_path *path,
2255 struct btrfs_dir_item *di);
2256 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2257 struct btrfs_root *root, const char *name,
2258 u16 name_len, const void *data, u16 data_len,
2260 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2261 struct btrfs_root *root,
2262 struct btrfs_path *path, u64 dir,
2263 const char *name, u16 name_len,
2266 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2267 struct btrfs_root *fs_root,
2268 u64 dirid, u64 *objectid);
2269 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2272 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2273 struct btrfs_root *root,
2274 const char *name, int name_len,
2275 u64 inode_objectid, u64 ref_objectid, u64 index);
2276 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2277 struct btrfs_root *root,
2278 const char *name, int name_len,
2279 u64 inode_objectid, u64 ref_objectid);
2280 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2281 struct btrfs_root *root,
2282 struct btrfs_path *path, u64 objectid);
2283 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2284 *root, u64 objectid, struct btrfs_inode_item
2286 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2287 *root, struct btrfs_path *path,
2288 struct btrfs_key *location, int mod);
2291 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2292 struct btrfs_root *root, u64 bytenr, u64 len);
2293 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2294 struct btrfs_root *root,
2295 u64 objectid, u64 pos, u64 offset,
2298 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2299 struct btrfs_root *root, u64 objectid,
2300 u64 offset, char *buffer, size_t size);
2301 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2302 struct btrfs_root *root,
2303 struct btrfs_path *path, u64 objectid,
2304 u64 bytenr, int mod);
2305 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2306 struct btrfs_root *root, u64 alloc_end,
2307 u64 bytenr, char *data, size_t len);
2308 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2309 struct btrfs_root *root,
2310 struct btrfs_path *path,
2311 u64 bytenr, int cow);
2312 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2313 struct btrfs_root *root, struct btrfs_path *path,