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.
23 #include "kerncompat.h"
24 #include "radix-tree.h"
25 #include "extent-cache.h"
26 #include "extent_io.h"
29 struct btrfs_trans_handle;
30 #define BTRFS_MAGIC "_BHRfS_M"
32 #define BTRFS_MAX_LEVEL 8
34 #define BTRFS_COMPAT_EXTENT_TREE_V0
36 /* holds pointers to all of the tree roots */
37 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
39 /* stores information about which extents are in use, and reference counts */
40 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
43 * chunk tree stores translations from logical -> physical block numbering
44 * the super block points to the chunk tree
46 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
49 * stores information about which areas of a given device are in use.
50 * one per device. The tree of tree roots points to the device tree
52 #define BTRFS_DEV_TREE_OBJECTID 4ULL
54 /* one per subvolume, storing files and directories */
55 #define BTRFS_FS_TREE_OBJECTID 5ULL
57 /* directory objectid inside the root tree */
58 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
59 /* holds checksums of all the data extents */
60 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
63 /* oprhan objectid for tracking unlinked/truncated files */
64 #define BTRFS_ORPHAN_OBJECTID -5ULL
66 /* does write ahead logging to speed up fsyncs */
67 #define BTRFS_TREE_LOG_OBJECTID -6ULL
68 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
71 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
72 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
75 * extent checksums all have this objectid
76 * this allows them to share the logging tree
79 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
81 /* dummy objectid represents multiple objectids */
82 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
85 * All files have objectids in this range.
87 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
88 #define BTRFS_LAST_FREE_OBJECTID -256ULL
89 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
94 * the device items go into the chunk tree. The key is in the form
95 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
97 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
100 * we can actually store much bigger names, but lets not confuse the rest
103 #define BTRFS_NAME_LEN 255
105 /* 32 bytes in various csum fields */
106 #define BTRFS_CSUM_SIZE 32
109 #define BTRFS_CSUM_TYPE_CRC32 0
113 #define BTRFS_CSUM_TYPE_CRC32 0
115 static int btrfs_csum_sizes[] = { 4, 0 };
117 /* four bytes for CRC32 */
118 #define BTRFS_CRC32_SIZE 4
119 #define BTRFS_EMPTY_DIR_SIZE 0
121 #define BTRFS_FT_UNKNOWN 0
122 #define BTRFS_FT_REG_FILE 1
123 #define BTRFS_FT_DIR 2
124 #define BTRFS_FT_CHRDEV 3
125 #define BTRFS_FT_BLKDEV 4
126 #define BTRFS_FT_FIFO 5
127 #define BTRFS_FT_SOCK 6
128 #define BTRFS_FT_SYMLINK 7
129 #define BTRFS_FT_XATTR 8
130 #define BTRFS_FT_MAX 9
133 * the key defines the order in the tree, and so it also defines (optimal)
134 * block layout. objectid corresonds to the inode number. The flags
135 * tells us things about the object, and is a kind of stream selector.
136 * so for a given inode, keys with flags of 1 might refer to the inode
137 * data, flags of 2 may point to file data in the btree and flags == 3
138 * may point to extents.
140 * offset is the starting byte offset for this key in the stream.
142 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
143 * in cpu native order. Otherwise they are identical and their sizes
144 * should be the same (ie both packed)
146 struct btrfs_disk_key {
150 } __attribute__ ((__packed__));
156 } __attribute__ ((__packed__));
158 struct btrfs_mapping_tree {
159 struct cache_tree cache_tree;
162 #define BTRFS_UUID_SIZE 16
163 struct btrfs_dev_item {
164 /* the internal btrfs device id */
167 /* size of the device */
173 /* optimal io alignment for this device */
176 /* optimal io width for this device */
179 /* minimal io size for this device */
182 /* type and info about this device */
185 /* expected generation for this device */
189 * starting byte of this partition on the device,
190 * to allowr for stripe alignment in the future
194 /* grouping information for allocation decisions */
197 /* seek speed 0-100 where 100 is fastest */
200 /* bandwidth 0-100 where 100 is fastest */
203 /* btrfs generated uuid for this device */
204 u8 uuid[BTRFS_UUID_SIZE];
206 /* uuid of FS who owns this device */
207 u8 fsid[BTRFS_UUID_SIZE];
208 } __attribute__ ((__packed__));
210 struct btrfs_stripe {
213 u8 dev_uuid[BTRFS_UUID_SIZE];
214 } __attribute__ ((__packed__));
217 /* size of this chunk in bytes */
220 /* objectid of the root referencing this chunk */
226 /* optimal io alignment for this chunk */
229 /* optimal io width for this chunk */
232 /* minimal io size for this chunk */
235 /* 2^16 stripes is quite a lot, a second limit is the size of a single
240 /* sub stripes only matter for raid10 */
242 struct btrfs_stripe stripe;
243 /* additional stripes go here */
244 } __attribute__ ((__packed__));
246 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
248 BUG_ON(num_stripes == 0);
249 return sizeof(struct btrfs_chunk) +
250 sizeof(struct btrfs_stripe) * (num_stripes - 1);
253 #define BTRFS_FSID_SIZE 16
254 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
255 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
256 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
257 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
259 #define BTRFS_BACKREF_REV_MAX 256
260 #define BTRFS_BACKREF_REV_SHIFT 56
261 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
262 BTRFS_BACKREF_REV_SHIFT)
264 #define BTRFS_OLD_BACKREF_REV 0
265 #define BTRFS_MIXED_BACKREF_REV 1
268 * every tree block (leaf or node) starts with this header.
270 struct btrfs_header {
271 /* these first four must match the super block */
272 u8 csum[BTRFS_CSUM_SIZE];
273 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
274 __le64 bytenr; /* which block this node is supposed to live in */
277 /* allowed to be different from the super from here on down */
278 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
283 } __attribute__ ((__packed__));
285 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
286 sizeof(struct btrfs_header)) / \
287 sizeof(struct btrfs_key_ptr))
288 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
289 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
290 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
291 sizeof(struct btrfs_item) - \
292 sizeof(struct btrfs_file_extent_item))
296 * this is a very generous portion of the super block, giving us
297 * room to translate 14 chunks with 3 stripes each.
299 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
300 #define BTRFS_LABEL_SIZE 256
303 * the super block basically lists the main trees of the FS
304 * it currently lacks any block count etc etc
306 struct btrfs_super_block {
307 u8 csum[BTRFS_CSUM_SIZE];
308 /* the first 3 fields must match struct btrfs_header */
309 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
310 __le64 bytenr; /* this block number */
313 /* allowed to be different from the btrfs_header from here own down */
320 /* this will help find the new super based on the log root */
321 __le64 log_root_transid;
324 __le64 root_dir_objectid;
330 __le32 sys_chunk_array_size;
331 __le64 chunk_root_generation;
333 __le64 compat_ro_flags;
334 __le64 incompat_flags;
339 struct btrfs_dev_item dev_item;
341 char label[BTRFS_LABEL_SIZE];
343 __le64 cache_generation;
345 /* future expansion */
347 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
348 } __attribute__ ((__packed__));
351 * Compat flags that we support. If any incompat flags are set other than the
352 * ones specified below then we will fail to mount
354 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
355 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
356 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
358 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
359 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
360 #define BTRFS_FEATURE_INCOMPAT_SUPP \
361 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
362 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
363 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
366 * A leaf is full of items. offset and size tell us where to find
367 * the item in the leaf (relative to the start of the data area)
370 struct btrfs_disk_key key;
373 } __attribute__ ((__packed__));
376 * leaves have an item area and a data area:
377 * [item0, item1....itemN] [free space] [dataN...data1, data0]
379 * The data is separate from the items to get the keys closer together
383 struct btrfs_header header;
384 struct btrfs_item items[];
385 } __attribute__ ((__packed__));
388 * all non-leaf blocks are nodes, they hold only keys and pointers to
391 struct btrfs_key_ptr {
392 struct btrfs_disk_key key;
395 } __attribute__ ((__packed__));
398 struct btrfs_header header;
399 struct btrfs_key_ptr ptrs[];
400 } __attribute__ ((__packed__));
403 * btrfs_paths remember the path taken from the root down to the leaf.
404 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
405 * to any other levels that are present.
407 * The slots array records the index of the item or block pointer
408 * used while walking the tree.
412 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
413 int slots[BTRFS_MAX_LEVEL];
414 /* if there is real range locking, this locks field will change */
415 int locks[BTRFS_MAX_LEVEL];
417 /* keep some upper locks as we walk down */
421 * set by btrfs_split_item, tells search_slot to keep all locks
422 * and to force calls to keep space in the nodes
424 unsigned int search_for_split:1;
425 unsigned int keep_locks:1;
426 unsigned int skip_locking:1;
427 unsigned int leave_spinning:1;
431 * items in the extent btree are used to record the objectid of the
432 * owner of the block and the number of references
435 struct btrfs_extent_item {
439 } __attribute__ ((__packed__));
441 struct btrfs_extent_item_v0 {
443 } __attribute__ ((__packed__));
445 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
446 sizeof(struct btrfs_item))
448 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
449 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
451 /* following flags only apply to tree blocks */
453 /* use full backrefs for extent pointers in the block*/
454 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
456 struct btrfs_tree_block_info {
457 struct btrfs_disk_key key;
459 } __attribute__ ((__packed__));
461 struct btrfs_extent_data_ref {
466 } __attribute__ ((__packed__));
468 struct btrfs_shared_data_ref {
470 } __attribute__ ((__packed__));
472 struct btrfs_extent_inline_ref {
475 } __attribute__ ((__packed__));
477 struct btrfs_extent_ref_v0 {
482 } __attribute__ ((__packed__));
484 /* dev extents record free space on individual devices. The owner
485 * field points back to the chunk allocation mapping tree that allocated
486 * the extent. The chunk tree uuid field is a way to double check the owner
488 struct btrfs_dev_extent {
490 __le64 chunk_objectid;
493 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
494 } __attribute__ ((__packed__));
496 struct btrfs_inode_ref {
500 } __attribute__ ((__packed__));
502 struct btrfs_timespec {
505 } __attribute__ ((__packed__));
508 BTRFS_COMPRESS_NONE = 0,
509 BTRFS_COMPRESS_ZLIB = 1,
510 BTRFS_COMPRESS_LAST = 2,
511 } btrfs_compression_type;
513 /* we don't understand any encryption methods right now */
515 BTRFS_ENCRYPTION_NONE = 0,
516 BTRFS_ENCRYPTION_LAST = 1,
517 } btrfs_encryption_type;
519 struct btrfs_inode_item {
520 /* nfs style generation number */
522 /* transid that last touched this inode */
534 /* modification sequence number for NFS */
538 * a little future expansion, for more than this we can
539 * just grow the inode item and version it
542 struct btrfs_timespec atime;
543 struct btrfs_timespec ctime;
544 struct btrfs_timespec mtime;
545 struct btrfs_timespec otime;
546 } __attribute__ ((__packed__));
548 struct btrfs_dir_log_item {
550 } __attribute__ ((__packed__));
552 struct btrfs_dir_item {
553 struct btrfs_disk_key location;
558 } __attribute__ ((__packed__));
560 struct btrfs_root_item {
561 struct btrfs_inode_item inode;
567 __le64 last_snapshot;
570 struct btrfs_disk_key drop_progress;
573 } __attribute__ ((__packed__));
576 * this is used for both forward and backward root refs
578 struct btrfs_root_ref {
582 } __attribute__ ((__packed__));
584 #define BTRFS_FILE_EXTENT_INLINE 0
585 #define BTRFS_FILE_EXTENT_REG 1
586 #define BTRFS_FILE_EXTENT_PREALLOC 2
588 struct btrfs_file_extent_item {
590 * transaction id that created this extent
594 * max number of bytes to hold this extent in ram
595 * when we split a compressed extent we can't know how big
596 * each of the resulting pieces will be. So, this is
597 * an upper limit on the size of the extent in ram instead of
603 * 32 bits for the various ways we might encode the data,
604 * including compression and encryption. If any of these
605 * are set to something a given disk format doesn't understand
606 * it is treated like an incompat flag for reading and writing,
611 __le16 other_encoding; /* spare for later use */
613 /* are we inline data or a real extent? */
617 * disk space consumed by the extent, checksum blocks are included
621 __le64 disk_num_bytes;
623 * the logical offset in file blocks (no csums)
624 * this extent record is for. This allows a file extent to point
625 * into the middle of an existing extent on disk, sharing it
626 * between two snapshots (useful if some bytes in the middle of the
627 * extent have changed
631 * the logical number of file blocks (no csums included)
635 } __attribute__ ((__packed__));
637 struct btrfs_csum_item {
639 } __attribute__ ((__packed__));
641 /* tag for the radix tree of block groups in ram */
642 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
643 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
644 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
645 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
646 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
647 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
648 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
650 struct btrfs_block_group_item {
652 __le64 chunk_objectid;
654 } __attribute__ ((__packed__));
656 struct btrfs_space_info {
662 struct list_head list;
665 struct btrfs_block_group_cache {
666 struct cache_extent cache;
667 struct btrfs_key key;
668 struct btrfs_block_group_item item;
669 struct btrfs_space_info *space_info;
676 struct btrfs_extent_ops {
677 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
678 u64 hint_byte, struct btrfs_key *ins);
679 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
684 struct btrfs_fs_devices;
685 struct btrfs_fs_info {
686 u8 fsid[BTRFS_FSID_SIZE];
687 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
688 struct btrfs_root *fs_root;
689 struct btrfs_root *extent_root;
690 struct btrfs_root *tree_root;
691 struct btrfs_root *chunk_root;
692 struct btrfs_root *dev_root;
693 struct btrfs_root *csum_root;
695 struct cache_tree fs_root_cache;
697 /* the log root tree is a directory of all the other log roots */
698 struct btrfs_root *log_root_tree;
700 struct extent_io_tree extent_cache;
701 struct extent_io_tree free_space_cache;
702 struct extent_io_tree block_group_cache;
703 struct extent_io_tree pinned_extents;
704 struct extent_io_tree pending_del;
705 struct extent_io_tree extent_ins;
707 /* logical->physical extent mapping */
708 struct btrfs_mapping_tree mapping_tree;
711 u64 last_trans_committed;
713 u64 avail_data_alloc_bits;
714 u64 avail_metadata_alloc_bits;
715 u64 avail_system_alloc_bits;
716 u64 data_alloc_profile;
717 u64 metadata_alloc_profile;
718 u64 system_alloc_profile;
721 struct btrfs_trans_handle *running_transaction;
722 struct btrfs_super_block super_copy;
723 struct mutex fs_mutex;
728 struct btrfs_extent_ops *extent_ops;
729 struct list_head dirty_cowonly_roots;
731 struct btrfs_fs_devices *fs_devices;
732 struct list_head space_info;
738 * in ram representation of the tree. extent_root is used for all allocations
739 * and for the extent tree extent_root root.
742 struct extent_buffer *node;
743 struct extent_buffer *commit_root;
744 struct btrfs_root_item root_item;
745 struct btrfs_key root_key;
746 struct btrfs_fs_info *fs_info;
750 /* data allocations are done in sectorsize units */
753 /* node allocations are done in nodesize units */
756 /* leaf allocations are done in leafsize units */
759 /* leaf allocations are done in leafsize units */
768 u64 last_inode_alloc;
770 /* the dirty list is only used by non-reference counted roots */
771 struct list_head dirty_list;
772 struct cache_extent cache;
776 * inode items have the data typically returned from stat and store other
777 * info about object characteristics. There is one for every file and dir in
780 #define BTRFS_INODE_ITEM_KEY 1
781 #define BTRFS_INODE_REF_KEY 12
782 #define BTRFS_XATTR_ITEM_KEY 24
783 #define BTRFS_ORPHAN_ITEM_KEY 48
785 #define BTRFS_DIR_LOG_ITEM_KEY 60
786 #define BTRFS_DIR_LOG_INDEX_KEY 72
788 * dir items are the name -> inode pointers in a directory. There is one
789 * for every name in a directory.
791 #define BTRFS_DIR_ITEM_KEY 84
792 #define BTRFS_DIR_INDEX_KEY 96
795 * extent data is for file data
797 #define BTRFS_EXTENT_DATA_KEY 108
800 * csum items have the checksums for data in the extents
802 #define BTRFS_CSUM_ITEM_KEY 120
804 * extent csums are stored in a separate tree and hold csums for
805 * an entire extent on disk.
807 #define BTRFS_EXTENT_CSUM_KEY 128
810 * root items point to tree roots. There are typically in the root
811 * tree used by the super block to find all the other trees
813 #define BTRFS_ROOT_ITEM_KEY 132
816 * root backrefs tie subvols and snapshots to the directory entries that
819 #define BTRFS_ROOT_BACKREF_KEY 144
822 * root refs make a fast index for listing all of the snapshots and
823 * subvolumes referenced by a given root. They point directly to the
824 * directory item in the root that references the subvol
826 #define BTRFS_ROOT_REF_KEY 156
829 * extent items are in the extent map tree. These record which blocks
830 * are used, and how many references there are to each block
832 #define BTRFS_EXTENT_ITEM_KEY 168
834 #define BTRFS_TREE_BLOCK_REF_KEY 176
836 #define BTRFS_EXTENT_DATA_REF_KEY 178
838 /* old style extent backrefs */
839 #define BTRFS_EXTENT_REF_V0_KEY 180
841 #define BTRFS_SHARED_BLOCK_REF_KEY 182
843 #define BTRFS_SHARED_DATA_REF_KEY 184
847 * block groups give us hints into the extent allocation trees. Which
848 * blocks are free etc etc
850 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
852 #define BTRFS_DEV_EXTENT_KEY 204
853 #define BTRFS_DEV_ITEM_KEY 216
854 #define BTRFS_CHUNK_ITEM_KEY 228
857 * string items are for debugging. They just store a short string of
860 #define BTRFS_STRING_ITEM_KEY 253
864 #define BTRFS_INODE_NODATASUM (1 << 0)
865 #define BTRFS_INODE_NODATACOW (1 << 1)
866 #define BTRFS_INODE_READONLY (1 << 2)
868 #define read_eb_member(eb, ptr, type, member, result) ( \
869 read_extent_buffer(eb, (char *)(result), \
870 ((unsigned long)(ptr)) + \
871 offsetof(type, member), \
872 sizeof(((type *)0)->member)))
874 #define write_eb_member(eb, ptr, type, member, result) ( \
875 write_extent_buffer(eb, (char *)(result), \
876 ((unsigned long)(ptr)) + \
877 offsetof(type, member), \
878 sizeof(((type *)0)->member)))
880 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
881 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
883 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
884 return le##bits##_to_cpu(h->member); \
886 static inline void btrfs_set_##name(struct extent_buffer *eb, \
889 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
890 h->member = cpu_to_le##bits(val); \
893 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
894 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
897 unsigned long offset = (unsigned long)s; \
898 type *p = (type *) (eb->data + offset); \
899 return le##bits##_to_cpu(p->member); \
901 static inline void btrfs_set_##name(struct extent_buffer *eb, \
902 type *s, u##bits val) \
904 unsigned long offset = (unsigned long)s; \
905 type *p = (type *) (eb->data + offset); \
906 p->member = cpu_to_le##bits(val); \
909 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
910 static inline u##bits btrfs_##name(type *s) \
912 return le##bits##_to_cpu(s->member); \
914 static inline void btrfs_set_##name(type *s, u##bits val) \
916 s->member = cpu_to_le##bits(val); \
919 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
920 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
921 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
922 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
923 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
924 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
926 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
927 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
928 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
929 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
930 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
931 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
933 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
934 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
936 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
938 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
940 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
942 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
944 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
945 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
947 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
949 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
951 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
954 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
956 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
959 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
961 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
964 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
965 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
966 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
967 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
968 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
969 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
970 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
971 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
972 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
973 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
974 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
976 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
978 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
981 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
982 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
983 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
985 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
987 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
989 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
991 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
992 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
994 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
996 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
997 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
999 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1002 unsigned long offset = (unsigned long)c;
1003 offset += offsetof(struct btrfs_chunk, stripe);
1004 offset += nr * sizeof(struct btrfs_stripe);
1005 return (struct btrfs_stripe *)offset;
1008 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1010 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1013 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1014 struct btrfs_chunk *c, int nr)
1016 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1019 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1020 struct btrfs_chunk *c, int nr,
1023 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1026 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1027 struct btrfs_chunk *c, int nr)
1029 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1032 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1033 struct btrfs_chunk *c, int nr,
1036 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1039 /* struct btrfs_block_group_item */
1040 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1042 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1044 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1045 struct btrfs_block_group_item, chunk_objectid, 64);
1047 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1048 struct btrfs_block_group_item, chunk_objectid, 64);
1049 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1050 struct btrfs_block_group_item, flags, 64);
1051 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1052 struct btrfs_block_group_item, flags, 64);
1054 /* struct btrfs_inode_ref */
1055 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1056 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1057 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1059 /* struct btrfs_inode_item */
1060 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1061 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1062 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1063 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1064 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1065 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1066 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1067 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1068 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1069 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1070 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1071 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1073 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1074 struct btrfs_inode_item, generation, 64);
1075 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1076 struct btrfs_inode_item, generation, 64);
1077 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1078 struct btrfs_inode_item, size, 64);
1079 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1080 struct btrfs_inode_item, nbytes, 64);
1081 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1082 struct btrfs_inode_item, block_group, 64);
1083 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1084 struct btrfs_inode_item, nlink, 32);
1085 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1086 struct btrfs_inode_item, uid, 32);
1087 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1088 struct btrfs_inode_item, gid, 32);
1089 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1090 struct btrfs_inode_item, mode, 32);
1091 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1092 struct btrfs_inode_item, rdev, 64);
1093 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1094 struct btrfs_inode_item, flags, 64);
1096 static inline struct btrfs_timespec *
1097 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1099 unsigned long ptr = (unsigned long)inode_item;
1100 ptr += offsetof(struct btrfs_inode_item, atime);
1101 return (struct btrfs_timespec *)ptr;
1104 static inline struct btrfs_timespec *
1105 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1107 unsigned long ptr = (unsigned long)inode_item;
1108 ptr += offsetof(struct btrfs_inode_item, mtime);
1109 return (struct btrfs_timespec *)ptr;
1112 static inline struct btrfs_timespec *
1113 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1115 unsigned long ptr = (unsigned long)inode_item;
1116 ptr += offsetof(struct btrfs_inode_item, ctime);
1117 return (struct btrfs_timespec *)ptr;
1120 static inline struct btrfs_timespec *
1121 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1123 unsigned long ptr = (unsigned long)inode_item;
1124 ptr += offsetof(struct btrfs_inode_item, otime);
1125 return (struct btrfs_timespec *)ptr;
1128 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1129 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1130 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1132 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1135 /* struct btrfs_dev_extent */
1136 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1138 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1139 chunk_objectid, 64);
1140 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1142 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1144 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1146 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1147 return (u8 *)((unsigned long)dev + ptr);
1151 /* struct btrfs_extent_item */
1152 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1153 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1155 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1157 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1159 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1161 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1162 struct btrfs_tree_block_info *item,
1163 struct btrfs_disk_key *key)
1165 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1168 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1169 struct btrfs_tree_block_info *item,
1170 struct btrfs_disk_key *key)
1172 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1175 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1177 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1179 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1181 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1184 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1187 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1189 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1192 static inline u32 btrfs_extent_inline_ref_size(int type)
1194 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1195 type == BTRFS_SHARED_BLOCK_REF_KEY)
1196 return sizeof(struct btrfs_extent_inline_ref);
1197 if (type == BTRFS_SHARED_DATA_REF_KEY)
1198 return sizeof(struct btrfs_shared_data_ref) +
1199 sizeof(struct btrfs_extent_inline_ref);
1200 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1201 return sizeof(struct btrfs_extent_data_ref) +
1202 offsetof(struct btrfs_extent_inline_ref, offset);
1207 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1208 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1210 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1211 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1213 /* struct btrfs_node */
1214 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1215 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1217 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1220 ptr = offsetof(struct btrfs_node, ptrs) +
1221 sizeof(struct btrfs_key_ptr) * nr;
1222 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1225 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1229 ptr = offsetof(struct btrfs_node, ptrs) +
1230 sizeof(struct btrfs_key_ptr) * nr;
1231 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1234 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1237 ptr = offsetof(struct btrfs_node, ptrs) +
1238 sizeof(struct btrfs_key_ptr) * nr;
1239 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1242 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1246 ptr = offsetof(struct btrfs_node, ptrs) +
1247 sizeof(struct btrfs_key_ptr) * nr;
1248 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1251 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1253 return offsetof(struct btrfs_node, ptrs) +
1254 sizeof(struct btrfs_key_ptr) * nr;
1257 static inline void btrfs_node_key(struct extent_buffer *eb,
1258 struct btrfs_disk_key *disk_key, int nr)
1261 ptr = btrfs_node_key_ptr_offset(nr);
1262 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1263 struct btrfs_key_ptr, key, disk_key);
1266 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1267 struct btrfs_disk_key *disk_key, int nr)
1270 ptr = btrfs_node_key_ptr_offset(nr);
1271 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1272 struct btrfs_key_ptr, key, disk_key);
1275 /* struct btrfs_item */
1276 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1277 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1279 static inline unsigned long btrfs_item_nr_offset(int nr)
1281 return offsetof(struct btrfs_leaf, items) +
1282 sizeof(struct btrfs_item) * nr;
1285 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1288 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1291 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1292 struct btrfs_item *item)
1294 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1297 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1299 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1302 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1304 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1307 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1309 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1312 static inline void btrfs_item_key(struct extent_buffer *eb,
1313 struct btrfs_disk_key *disk_key, int nr)
1315 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1316 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1319 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1320 struct btrfs_disk_key *disk_key, int nr)
1322 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1323 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1326 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1329 * struct btrfs_root_ref
1331 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1332 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1333 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1335 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1336 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1337 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1339 /* struct btrfs_dir_item */
1340 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1341 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1342 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1343 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1345 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1346 struct btrfs_dir_item *item,
1347 struct btrfs_disk_key *key)
1349 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1352 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1353 struct btrfs_dir_item *item,
1354 struct btrfs_disk_key *key)
1356 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1359 /* struct btrfs_disk_key */
1360 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1362 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1363 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1365 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1366 struct btrfs_disk_key *disk)
1368 cpu->offset = le64_to_cpu(disk->offset);
1369 cpu->type = disk->type;
1370 cpu->objectid = le64_to_cpu(disk->objectid);
1373 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1374 struct btrfs_key *cpu)
1376 disk->offset = cpu_to_le64(cpu->offset);
1377 disk->type = cpu->type;
1378 disk->objectid = cpu_to_le64(cpu->objectid);
1381 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1382 struct btrfs_key *key, int nr)
1384 struct btrfs_disk_key disk_key;
1385 btrfs_node_key(eb, &disk_key, nr);
1386 btrfs_disk_key_to_cpu(key, &disk_key);
1389 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1390 struct btrfs_key *key, int nr)
1392 struct btrfs_disk_key disk_key;
1393 btrfs_item_key(eb, &disk_key, nr);
1394 btrfs_disk_key_to_cpu(key, &disk_key);
1397 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1398 struct btrfs_dir_item *item,
1399 struct btrfs_key *key)
1401 struct btrfs_disk_key disk_key;
1402 btrfs_dir_item_key(eb, item, &disk_key);
1403 btrfs_disk_key_to_cpu(key, &disk_key);
1407 static inline u8 btrfs_key_type(struct btrfs_key *key)
1412 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1417 /* struct btrfs_header */
1418 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1419 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1421 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1422 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1423 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1424 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1426 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1428 return (btrfs_header_flags(eb) & flag) == flag;
1431 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1433 u64 flags = btrfs_header_flags(eb);
1434 btrfs_set_header_flags(eb, flags | flag);
1435 return (flags & flag) == flag;
1438 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1440 u64 flags = btrfs_header_flags(eb);
1441 btrfs_set_header_flags(eb, flags & ~flag);
1442 return (flags & flag) == flag;
1445 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1447 u64 flags = btrfs_header_flags(eb);
1448 return flags >> BTRFS_BACKREF_REV_SHIFT;
1451 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1454 u64 flags = btrfs_header_flags(eb);
1455 flags &= ~BTRFS_BACKREF_REV_MASK;
1456 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1457 btrfs_set_header_flags(eb, flags);
1460 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1462 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1466 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1468 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1472 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1474 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1478 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1480 unsigned long ptr = offsetof(struct btrfs_header, csum);
1484 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1489 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1494 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1499 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1501 return (btrfs_header_level(eb) == 0);
1504 /* struct btrfs_root_item */
1505 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1507 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1508 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1509 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1511 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1513 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1514 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1515 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1516 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1517 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1518 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1519 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1520 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1524 /* struct btrfs_super_block */
1526 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1527 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1528 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1530 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1531 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1532 struct btrfs_super_block, sys_chunk_array_size, 32);
1533 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1534 struct btrfs_super_block, chunk_root_generation, 64);
1535 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1537 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1539 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1540 chunk_root_level, 8);
1541 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1543 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1544 log_root_transid, 64);
1545 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1547 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1549 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1551 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1553 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1555 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1557 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1559 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1560 root_dir_objectid, 64);
1561 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1563 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1565 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1567 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1568 incompat_flags, 64);
1569 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1571 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1572 cache_generation, 64);
1574 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1576 int t = btrfs_super_csum_type(s);
1577 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1578 return btrfs_csum_sizes[t];
1581 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1583 return offsetof(struct btrfs_leaf, items);
1586 /* struct btrfs_file_extent_item */
1587 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1588 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
1590 static inline unsigned long btrfs_file_extent_inline_start(struct
1591 btrfs_file_extent_item *e)
1593 unsigned long offset = (unsigned long)e;
1594 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1598 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1600 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1603 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1605 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
1607 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1609 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
1611 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1612 disk_num_bytes, 64);
1613 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1615 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
1617 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1619 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
1621 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1623 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
1625 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1627 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
1629 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1631 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1632 other_encoding, 16);
1634 /* this returns the number of file bytes represented by the inline item.
1635 * If an item is compressed, this is the uncompressed size
1637 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1638 struct btrfs_file_extent_item *e)
1640 return btrfs_file_extent_ram_bytes(eb, e);
1644 * this returns the number of bytes used by the item on disk, minus the
1645 * size of any extent headers. If a file is compressed on disk, this is
1646 * the compressed size
1648 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1649 struct btrfs_item *e)
1651 unsigned long offset;
1652 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1653 return btrfs_item_size(eb, e) - offset;
1656 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1658 return root->leafsize;
1659 return root->nodesize;
1662 /* helper function to cast into the data area of the leaf. */
1663 #define btrfs_item_ptr(leaf, slot, type) \
1664 ((type *)(btrfs_leaf_data(leaf) + \
1665 btrfs_item_offset_nr(leaf, slot)))
1667 #define btrfs_item_ptr_offset(leaf, slot) \
1668 ((unsigned long)(btrfs_leaf_data(leaf) + \
1669 btrfs_item_offset_nr(leaf, slot)))
1672 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1673 struct btrfs_root *root);
1674 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1675 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1676 btrfs_fs_info *info,
1678 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1679 struct btrfs_block_group_cache
1680 *hint, u64 search_start,
1681 int data, int owner);
1682 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1683 struct btrfs_root *root,
1684 u32 blocksize, u64 root_objectid,
1685 struct btrfs_disk_key *key, int level,
1686 u64 hint, u64 empty_size);
1687 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1688 struct btrfs_root *root,
1689 u64 num_bytes, u64 parent,
1690 u64 root_objectid, u64 ref_generation,
1691 u64 owner, u64 empty_size, u64 hint_byte,
1692 u64 search_end, struct btrfs_key *ins, int data);
1693 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
1694 struct btrfs_root *root, u64 bytenr,
1695 u64 num_bytes, u64 *refs, u64 *flags);
1696 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
1697 struct btrfs_root *root,
1698 u64 bytenr, u64 num_bytes, u64 flags);
1699 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1700 struct extent_buffer *buf, int record_parent);
1701 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1702 struct extent_buffer *buf, int record_parent);
1703 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1704 struct btrfs_root *root,
1705 u64 bytenr, u64 num_bytes, u64 parent,
1706 u64 root_objectid, u64 owner, u64 offset);
1707 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1708 struct btrfs_root *root,
1709 struct extent_io_tree *unpin);
1710 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1711 struct btrfs_root *root,
1712 u64 bytenr, u64 num_bytes, u64 parent,
1713 u64 root_objectid, u64 ref_generation,
1714 u64 owner_objectid);
1715 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1716 struct btrfs_root *root, u64 bytenr,
1717 u64 orig_parent, u64 parent,
1718 u64 root_objectid, u64 ref_generation,
1719 u64 owner_objectid);
1720 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1721 struct btrfs_root *root);
1722 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1723 int btrfs_read_block_groups(struct btrfs_root *root);
1724 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1725 struct btrfs_root *root, u64 bytes_used,
1726 u64 type, u64 chunk_objectid, u64 chunk_offset,
1728 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
1729 struct btrfs_root *root);
1730 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1731 struct btrfs_root *root, u64 bytenr, u64 num,
1732 int alloc, int mark_free);
1734 int btrfs_previous_item(struct btrfs_root *root,
1735 struct btrfs_path *path, u64 min_objectid,
1737 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1738 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1739 struct btrfs_root *root, struct extent_buffer *buf,
1740 struct extent_buffer *parent, int parent_slot,
1741 struct extent_buffer **cow_ret);
1742 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
1743 struct btrfs_root *root,
1744 struct extent_buffer *buf,
1745 struct extent_buffer *parent, int parent_slot,
1746 struct extent_buffer **cow_ret,
1747 u64 search_start, u64 empty_size);
1748 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1749 struct btrfs_root *root,
1750 struct extent_buffer *buf,
1751 struct extent_buffer **cow_ret, u64 new_root_objectid);
1752 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1753 *root, struct btrfs_path *path, u32 data_size);
1754 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1755 struct btrfs_root *root,
1756 struct btrfs_path *path,
1757 u32 new_size, int from_end);
1758 int btrfs_split_item(struct btrfs_trans_handle *trans,
1759 struct btrfs_root *root,
1760 struct btrfs_path *path,
1761 struct btrfs_key *new_key,
1762 unsigned long split_offset);
1763 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1764 *root, struct btrfs_key *key, struct btrfs_path *p, int
1766 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1767 struct btrfs_root *root, struct extent_buffer *parent,
1768 int start_slot, int cache_only, u64 *last_ret,
1769 struct btrfs_key *progress);
1770 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1771 struct btrfs_path *btrfs_alloc_path(void);
1772 void btrfs_free_path(struct btrfs_path *p);
1773 void btrfs_init_path(struct btrfs_path *p);
1774 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1775 struct btrfs_path *path, int slot, int nr);
1777 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1778 struct btrfs_root *root,
1779 struct btrfs_path *path)
1781 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1784 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1785 *root, struct btrfs_key *key, void *data, u32 data_size);
1786 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1787 struct btrfs_root *root,
1788 struct btrfs_path *path,
1789 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1791 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1792 struct btrfs_root *root,
1793 struct btrfs_path *path,
1794 struct btrfs_key *key,
1797 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1800 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1801 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1802 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1803 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1805 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1806 struct btrfs_root *root, struct btrfs_path *path,
1807 struct btrfs_key *new_key);
1810 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1811 struct btrfs_root *tree_root,
1812 u64 root_id, u8 type, u64 ref_id,
1813 u64 dirid, u64 sequence,
1814 const char *name, int name_len);
1815 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1816 struct btrfs_key *key);
1817 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1818 *root, struct btrfs_key *key, struct btrfs_root_item
1820 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1821 *root, struct btrfs_key *key, struct btrfs_root_item
1823 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1824 btrfs_root_item *item, struct btrfs_key *key);
1825 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1826 struct btrfs_root *latest_root);
1828 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1829 *root, const char *name, int name_len, u64 dir,
1830 struct btrfs_key *location, u8 type, u64 index);
1831 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1832 struct btrfs_root *root,
1833 struct btrfs_path *path, u64 dir,
1834 const char *name, int name_len,
1836 struct btrfs_dir_item *
1837 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1838 struct btrfs_root *root,
1839 struct btrfs_path *path, u64 dir,
1840 u64 objectid, const char *name, int name_len,
1842 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1843 struct btrfs_path *path,
1844 const char *name, int name_len);
1845 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1846 struct btrfs_root *root,
1847 struct btrfs_path *path,
1848 struct btrfs_dir_item *di);
1849 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1850 struct btrfs_root *root, const char *name,
1851 u16 name_len, const void *data, u16 data_len,
1853 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1854 struct btrfs_root *root,
1855 struct btrfs_path *path, u64 dir,
1856 const char *name, u16 name_len,
1859 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1860 struct btrfs_root *fs_root,
1861 u64 dirid, u64 *objectid);
1862 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1865 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1866 struct btrfs_root *root,
1867 const char *name, int name_len,
1868 u64 inode_objectid, u64 ref_objectid, u64 index);
1869 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1870 struct btrfs_root *root,
1871 const char *name, int name_len,
1872 u64 inode_objectid, u64 ref_objectid);
1873 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1874 struct btrfs_root *root,
1875 struct btrfs_path *path, u64 objectid);
1876 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1877 *root, u64 objectid, struct btrfs_inode_item
1879 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1880 *root, struct btrfs_path *path,
1881 struct btrfs_key *location, int mod);
1884 int btrfs_del_csums(struct btrfs_trans_handle *trans,
1885 struct btrfs_root *root, u64 bytenr, u64 len);
1886 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1887 struct btrfs_root *root,
1888 u64 objectid, u64 pos, u64 offset,
1891 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
1892 struct btrfs_root *root, u64 objectid,
1893 u64 offset, char *buffer, size_t size);
1894 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1895 struct btrfs_root *root,
1896 struct btrfs_path *path, u64 objectid,
1897 u64 bytenr, int mod);
1898 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
1899 struct btrfs_root *root, u64 alloc_end,
1900 u64 bytenr, char *data, size_t len);
1901 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1902 struct btrfs_root *root,
1903 struct btrfs_path *path,
1904 u64 bytenr, int cow);
1905 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1906 struct btrfs_root *root, struct btrfs_path *path,