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 (2ULL << 0)
357 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
358 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
359 #define BTRFS_FEATURE_INCOMPAT_SUPP \
360 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
361 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL)
364 * A leaf is full of items. offset and size tell us where to find
365 * the item in the leaf (relative to the start of the data area)
368 struct btrfs_disk_key key;
371 } __attribute__ ((__packed__));
374 * leaves have an item area and a data area:
375 * [item0, item1....itemN] [free space] [dataN...data1, data0]
377 * The data is separate from the items to get the keys closer together
381 struct btrfs_header header;
382 struct btrfs_item items[];
383 } __attribute__ ((__packed__));
386 * all non-leaf blocks are nodes, they hold only keys and pointers to
389 struct btrfs_key_ptr {
390 struct btrfs_disk_key key;
393 } __attribute__ ((__packed__));
396 struct btrfs_header header;
397 struct btrfs_key_ptr ptrs[];
398 } __attribute__ ((__packed__));
401 * btrfs_paths remember the path taken from the root down to the leaf.
402 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
403 * to any other levels that are present.
405 * The slots array records the index of the item or block pointer
406 * used while walking the tree.
410 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
411 int slots[BTRFS_MAX_LEVEL];
412 /* if there is real range locking, this locks field will change */
413 int locks[BTRFS_MAX_LEVEL];
415 /* keep some upper locks as we walk down */
419 * set by btrfs_split_item, tells search_slot to keep all locks
420 * and to force calls to keep space in the nodes
422 unsigned int search_for_split:1;
423 unsigned int keep_locks:1;
424 unsigned int skip_locking:1;
425 unsigned int leave_spinning:1;
429 * items in the extent btree are used to record the objectid of the
430 * owner of the block and the number of references
433 struct btrfs_extent_item {
437 } __attribute__ ((__packed__));
439 struct btrfs_extent_item_v0 {
441 } __attribute__ ((__packed__));
443 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
444 sizeof(struct btrfs_item))
446 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
447 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
449 /* following flags only apply to tree blocks */
451 /* use full backrefs for extent pointers in the block*/
452 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
454 struct btrfs_tree_block_info {
455 struct btrfs_disk_key key;
457 } __attribute__ ((__packed__));
459 struct btrfs_extent_data_ref {
464 } __attribute__ ((__packed__));
466 struct btrfs_shared_data_ref {
468 } __attribute__ ((__packed__));
470 struct btrfs_extent_inline_ref {
473 } __attribute__ ((__packed__));
475 struct btrfs_extent_ref_v0 {
480 } __attribute__ ((__packed__));
482 /* dev extents record free space on individual devices. The owner
483 * field points back to the chunk allocation mapping tree that allocated
484 * the extent. The chunk tree uuid field is a way to double check the owner
486 struct btrfs_dev_extent {
488 __le64 chunk_objectid;
491 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
492 } __attribute__ ((__packed__));
494 struct btrfs_inode_ref {
498 } __attribute__ ((__packed__));
500 struct btrfs_timespec {
503 } __attribute__ ((__packed__));
506 BTRFS_COMPRESS_NONE = 0,
507 BTRFS_COMPRESS_ZLIB = 1,
508 BTRFS_COMPRESS_LAST = 2,
509 } btrfs_compression_type;
511 /* we don't understand any encryption methods right now */
513 BTRFS_ENCRYPTION_NONE = 0,
514 BTRFS_ENCRYPTION_LAST = 1,
515 } btrfs_encryption_type;
517 struct btrfs_inode_item {
518 /* nfs style generation number */
520 /* transid that last touched this inode */
532 /* modification sequence number for NFS */
536 * a little future expansion, for more than this we can
537 * just grow the inode item and version it
540 struct btrfs_timespec atime;
541 struct btrfs_timespec ctime;
542 struct btrfs_timespec mtime;
543 struct btrfs_timespec otime;
544 } __attribute__ ((__packed__));
546 struct btrfs_dir_log_item {
548 } __attribute__ ((__packed__));
550 struct btrfs_dir_item {
551 struct btrfs_disk_key location;
556 } __attribute__ ((__packed__));
558 struct btrfs_root_item {
559 struct btrfs_inode_item inode;
565 __le64 last_snapshot;
568 struct btrfs_disk_key drop_progress;
571 } __attribute__ ((__packed__));
574 * this is used for both forward and backward root refs
576 struct btrfs_root_ref {
580 } __attribute__ ((__packed__));
582 #define BTRFS_FILE_EXTENT_INLINE 0
583 #define BTRFS_FILE_EXTENT_REG 1
584 #define BTRFS_FILE_EXTENT_PREALLOC 2
586 struct btrfs_file_extent_item {
588 * transaction id that created this extent
592 * max number of bytes to hold this extent in ram
593 * when we split a compressed extent we can't know how big
594 * each of the resulting pieces will be. So, this is
595 * an upper limit on the size of the extent in ram instead of
601 * 32 bits for the various ways we might encode the data,
602 * including compression and encryption. If any of these
603 * are set to something a given disk format doesn't understand
604 * it is treated like an incompat flag for reading and writing,
609 __le16 other_encoding; /* spare for later use */
611 /* are we inline data or a real extent? */
615 * disk space consumed by the extent, checksum blocks are included
619 __le64 disk_num_bytes;
621 * the logical offset in file blocks (no csums)
622 * this extent record is for. This allows a file extent to point
623 * into the middle of an existing extent on disk, sharing it
624 * between two snapshots (useful if some bytes in the middle of the
625 * extent have changed
629 * the logical number of file blocks (no csums included)
633 } __attribute__ ((__packed__));
635 struct btrfs_csum_item {
637 } __attribute__ ((__packed__));
639 /* tag for the radix tree of block groups in ram */
640 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
641 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
642 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
643 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
644 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
645 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
646 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
648 struct btrfs_block_group_item {
650 __le64 chunk_objectid;
652 } __attribute__ ((__packed__));
654 struct btrfs_space_info {
660 struct list_head list;
663 struct btrfs_block_group_cache {
664 struct cache_extent cache;
665 struct btrfs_key key;
666 struct btrfs_block_group_item item;
667 struct btrfs_space_info *space_info;
674 struct btrfs_extent_ops {
675 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
676 u64 hint_byte, struct btrfs_key *ins);
677 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
682 struct btrfs_fs_devices;
683 struct btrfs_fs_info {
684 u8 fsid[BTRFS_FSID_SIZE];
685 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
686 struct btrfs_root *fs_root;
687 struct btrfs_root *extent_root;
688 struct btrfs_root *tree_root;
689 struct btrfs_root *chunk_root;
690 struct btrfs_root *dev_root;
691 struct btrfs_root *csum_root;
693 struct cache_tree fs_root_cache;
695 /* the log root tree is a directory of all the other log roots */
696 struct btrfs_root *log_root_tree;
698 struct extent_io_tree extent_cache;
699 struct extent_io_tree free_space_cache;
700 struct extent_io_tree block_group_cache;
701 struct extent_io_tree pinned_extents;
702 struct extent_io_tree pending_del;
703 struct extent_io_tree extent_ins;
705 /* logical->physical extent mapping */
706 struct btrfs_mapping_tree mapping_tree;
709 u64 last_trans_committed;
711 u64 avail_data_alloc_bits;
712 u64 avail_metadata_alloc_bits;
713 u64 avail_system_alloc_bits;
714 u64 data_alloc_profile;
715 u64 metadata_alloc_profile;
716 u64 system_alloc_profile;
719 struct btrfs_trans_handle *running_transaction;
720 struct btrfs_super_block super_copy;
721 struct mutex fs_mutex;
726 struct btrfs_extent_ops *extent_ops;
727 struct list_head dirty_cowonly_roots;
729 struct btrfs_fs_devices *fs_devices;
730 struct list_head space_info;
736 * in ram representation of the tree. extent_root is used for all allocations
737 * and for the extent tree extent_root root.
740 struct extent_buffer *node;
741 struct extent_buffer *commit_root;
742 struct btrfs_root_item root_item;
743 struct btrfs_key root_key;
744 struct btrfs_fs_info *fs_info;
748 /* data allocations are done in sectorsize units */
751 /* node allocations are done in nodesize units */
754 /* leaf allocations are done in leafsize units */
757 /* leaf allocations are done in leafsize units */
766 u64 last_inode_alloc;
768 /* the dirty list is only used by non-reference counted roots */
769 struct list_head dirty_list;
770 struct cache_extent cache;
774 * inode items have the data typically returned from stat and store other
775 * info about object characteristics. There is one for every file and dir in
778 #define BTRFS_INODE_ITEM_KEY 1
779 #define BTRFS_INODE_REF_KEY 12
780 #define BTRFS_XATTR_ITEM_KEY 24
781 #define BTRFS_ORPHAN_ITEM_KEY 48
783 #define BTRFS_DIR_LOG_ITEM_KEY 60
784 #define BTRFS_DIR_LOG_INDEX_KEY 72
786 * dir items are the name -> inode pointers in a directory. There is one
787 * for every name in a directory.
789 #define BTRFS_DIR_ITEM_KEY 84
790 #define BTRFS_DIR_INDEX_KEY 96
793 * extent data is for file data
795 #define BTRFS_EXTENT_DATA_KEY 108
798 * csum items have the checksums for data in the extents
800 #define BTRFS_CSUM_ITEM_KEY 120
802 * extent csums are stored in a separate tree and hold csums for
803 * an entire extent on disk.
805 #define BTRFS_EXTENT_CSUM_KEY 128
808 * root items point to tree roots. There are typically in the root
809 * tree used by the super block to find all the other trees
811 #define BTRFS_ROOT_ITEM_KEY 132
814 * root backrefs tie subvols and snapshots to the directory entries that
817 #define BTRFS_ROOT_BACKREF_KEY 144
820 * root refs make a fast index for listing all of the snapshots and
821 * subvolumes referenced by a given root. They point directly to the
822 * directory item in the root that references the subvol
824 #define BTRFS_ROOT_REF_KEY 156
827 * extent items are in the extent map tree. These record which blocks
828 * are used, and how many references there are to each block
830 #define BTRFS_EXTENT_ITEM_KEY 168
832 #define BTRFS_TREE_BLOCK_REF_KEY 176
834 #define BTRFS_EXTENT_DATA_REF_KEY 178
836 /* old style extent backrefs */
837 #define BTRFS_EXTENT_REF_V0_KEY 180
839 #define BTRFS_SHARED_BLOCK_REF_KEY 182
841 #define BTRFS_SHARED_DATA_REF_KEY 184
845 * block groups give us hints into the extent allocation trees. Which
846 * blocks are free etc etc
848 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
850 #define BTRFS_DEV_EXTENT_KEY 204
851 #define BTRFS_DEV_ITEM_KEY 216
852 #define BTRFS_CHUNK_ITEM_KEY 228
855 * string items are for debugging. They just store a short string of
858 #define BTRFS_STRING_ITEM_KEY 253
862 #define BTRFS_INODE_NODATASUM (1 << 0)
863 #define BTRFS_INODE_NODATACOW (1 << 1)
864 #define BTRFS_INODE_READONLY (1 << 2)
866 #define read_eb_member(eb, ptr, type, member, result) ( \
867 read_extent_buffer(eb, (char *)(result), \
868 ((unsigned long)(ptr)) + \
869 offsetof(type, member), \
870 sizeof(((type *)0)->member)))
872 #define write_eb_member(eb, ptr, type, member, result) ( \
873 write_extent_buffer(eb, (char *)(result), \
874 ((unsigned long)(ptr)) + \
875 offsetof(type, member), \
876 sizeof(((type *)0)->member)))
878 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
879 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
881 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
882 return le##bits##_to_cpu(h->member); \
884 static inline void btrfs_set_##name(struct extent_buffer *eb, \
887 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
888 h->member = cpu_to_le##bits(val); \
891 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
892 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
895 unsigned long offset = (unsigned long)s; \
896 type *p = (type *) (eb->data + offset); \
897 return le##bits##_to_cpu(p->member); \
899 static inline void btrfs_set_##name(struct extent_buffer *eb, \
900 type *s, u##bits val) \
902 unsigned long offset = (unsigned long)s; \
903 type *p = (type *) (eb->data + offset); \
904 p->member = cpu_to_le##bits(val); \
907 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
908 static inline u##bits btrfs_##name(type *s) \
910 return le##bits##_to_cpu(s->member); \
912 static inline void btrfs_set_##name(type *s, u##bits val) \
914 s->member = cpu_to_le##bits(val); \
917 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
918 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
919 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
920 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
921 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
922 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
924 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
925 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
926 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
927 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
928 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
929 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
931 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
932 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
934 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
936 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
938 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
940 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
942 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
943 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
945 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
947 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
949 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
952 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
954 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
957 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
959 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
962 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
963 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
964 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
965 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
966 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
967 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
968 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
969 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
970 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
971 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
972 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
974 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
976 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
979 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
980 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
981 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
983 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
985 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
987 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
989 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
990 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
992 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
994 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
995 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
997 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1000 unsigned long offset = (unsigned long)c;
1001 offset += offsetof(struct btrfs_chunk, stripe);
1002 offset += nr * sizeof(struct btrfs_stripe);
1003 return (struct btrfs_stripe *)offset;
1006 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1008 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1011 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1012 struct btrfs_chunk *c, int nr)
1014 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1017 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1018 struct btrfs_chunk *c, int nr,
1021 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1024 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1025 struct btrfs_chunk *c, int nr)
1027 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1030 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1031 struct btrfs_chunk *c, int nr,
1034 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1037 /* struct btrfs_block_group_item */
1038 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1040 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1042 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1043 struct btrfs_block_group_item, chunk_objectid, 64);
1045 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1046 struct btrfs_block_group_item, chunk_objectid, 64);
1047 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1048 struct btrfs_block_group_item, flags, 64);
1049 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1050 struct btrfs_block_group_item, flags, 64);
1052 /* struct btrfs_inode_ref */
1053 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1054 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1055 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1057 /* struct btrfs_inode_item */
1058 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1059 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1060 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1061 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1062 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1063 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1064 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1065 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1066 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1067 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1068 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1069 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1071 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1072 struct btrfs_inode_item, generation, 64);
1073 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1074 struct btrfs_inode_item, generation, 64);
1075 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1076 struct btrfs_inode_item, size, 64);
1077 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1078 struct btrfs_inode_item, nbytes, 64);
1079 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1080 struct btrfs_inode_item, block_group, 64);
1081 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1082 struct btrfs_inode_item, nlink, 32);
1083 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1084 struct btrfs_inode_item, uid, 32);
1085 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1086 struct btrfs_inode_item, gid, 32);
1087 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1088 struct btrfs_inode_item, mode, 32);
1089 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1090 struct btrfs_inode_item, rdev, 64);
1091 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1092 struct btrfs_inode_item, flags, 64);
1094 static inline struct btrfs_timespec *
1095 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1097 unsigned long ptr = (unsigned long)inode_item;
1098 ptr += offsetof(struct btrfs_inode_item, atime);
1099 return (struct btrfs_timespec *)ptr;
1102 static inline struct btrfs_timespec *
1103 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1105 unsigned long ptr = (unsigned long)inode_item;
1106 ptr += offsetof(struct btrfs_inode_item, mtime);
1107 return (struct btrfs_timespec *)ptr;
1110 static inline struct btrfs_timespec *
1111 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1113 unsigned long ptr = (unsigned long)inode_item;
1114 ptr += offsetof(struct btrfs_inode_item, ctime);
1115 return (struct btrfs_timespec *)ptr;
1118 static inline struct btrfs_timespec *
1119 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1121 unsigned long ptr = (unsigned long)inode_item;
1122 ptr += offsetof(struct btrfs_inode_item, otime);
1123 return (struct btrfs_timespec *)ptr;
1126 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1127 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1128 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1130 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1133 /* struct btrfs_dev_extent */
1134 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1136 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1137 chunk_objectid, 64);
1138 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1140 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1142 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1144 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1145 return (u8 *)((unsigned long)dev + ptr);
1149 /* struct btrfs_extent_item */
1150 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1151 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1153 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1155 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1157 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1159 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1160 struct btrfs_tree_block_info *item,
1161 struct btrfs_disk_key *key)
1163 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1166 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1167 struct btrfs_tree_block_info *item,
1168 struct btrfs_disk_key *key)
1170 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1173 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1175 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1177 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1179 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1182 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1185 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1187 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1190 static inline u32 btrfs_extent_inline_ref_size(int type)
1192 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1193 type == BTRFS_SHARED_BLOCK_REF_KEY)
1194 return sizeof(struct btrfs_extent_inline_ref);
1195 if (type == BTRFS_SHARED_DATA_REF_KEY)
1196 return sizeof(struct btrfs_shared_data_ref) +
1197 sizeof(struct btrfs_extent_inline_ref);
1198 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1199 return sizeof(struct btrfs_extent_data_ref) +
1200 offsetof(struct btrfs_extent_inline_ref, offset);
1205 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1206 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1208 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1209 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1211 /* struct btrfs_node */
1212 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1213 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1215 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1218 ptr = offsetof(struct btrfs_node, ptrs) +
1219 sizeof(struct btrfs_key_ptr) * nr;
1220 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1223 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1227 ptr = offsetof(struct btrfs_node, ptrs) +
1228 sizeof(struct btrfs_key_ptr) * nr;
1229 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1232 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1235 ptr = offsetof(struct btrfs_node, ptrs) +
1236 sizeof(struct btrfs_key_ptr) * nr;
1237 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1240 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1244 ptr = offsetof(struct btrfs_node, ptrs) +
1245 sizeof(struct btrfs_key_ptr) * nr;
1246 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1249 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1251 return offsetof(struct btrfs_node, ptrs) +
1252 sizeof(struct btrfs_key_ptr) * nr;
1255 static inline void btrfs_node_key(struct extent_buffer *eb,
1256 struct btrfs_disk_key *disk_key, int nr)
1259 ptr = btrfs_node_key_ptr_offset(nr);
1260 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1261 struct btrfs_key_ptr, key, disk_key);
1264 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1265 struct btrfs_disk_key *disk_key, int nr)
1268 ptr = btrfs_node_key_ptr_offset(nr);
1269 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1270 struct btrfs_key_ptr, key, disk_key);
1273 /* struct btrfs_item */
1274 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1275 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1277 static inline unsigned long btrfs_item_nr_offset(int nr)
1279 return offsetof(struct btrfs_leaf, items) +
1280 sizeof(struct btrfs_item) * nr;
1283 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1286 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1289 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1290 struct btrfs_item *item)
1292 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1295 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1297 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1300 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1302 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1305 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1307 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1310 static inline void btrfs_item_key(struct extent_buffer *eb,
1311 struct btrfs_disk_key *disk_key, int nr)
1313 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1314 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1317 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1318 struct btrfs_disk_key *disk_key, int nr)
1320 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1321 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1324 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1327 * struct btrfs_root_ref
1329 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1330 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1331 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1333 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1334 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1335 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1337 /* struct btrfs_dir_item */
1338 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1339 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1340 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1341 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1343 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1344 struct btrfs_dir_item *item,
1345 struct btrfs_disk_key *key)
1347 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1350 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1351 struct btrfs_dir_item *item,
1352 struct btrfs_disk_key *key)
1354 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1357 /* struct btrfs_disk_key */
1358 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1360 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1361 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1363 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1364 struct btrfs_disk_key *disk)
1366 cpu->offset = le64_to_cpu(disk->offset);
1367 cpu->type = disk->type;
1368 cpu->objectid = le64_to_cpu(disk->objectid);
1371 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1372 struct btrfs_key *cpu)
1374 disk->offset = cpu_to_le64(cpu->offset);
1375 disk->type = cpu->type;
1376 disk->objectid = cpu_to_le64(cpu->objectid);
1379 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1380 struct btrfs_key *key, int nr)
1382 struct btrfs_disk_key disk_key;
1383 btrfs_node_key(eb, &disk_key, nr);
1384 btrfs_disk_key_to_cpu(key, &disk_key);
1387 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1388 struct btrfs_key *key, int nr)
1390 struct btrfs_disk_key disk_key;
1391 btrfs_item_key(eb, &disk_key, nr);
1392 btrfs_disk_key_to_cpu(key, &disk_key);
1395 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1396 struct btrfs_dir_item *item,
1397 struct btrfs_key *key)
1399 struct btrfs_disk_key disk_key;
1400 btrfs_dir_item_key(eb, item, &disk_key);
1401 btrfs_disk_key_to_cpu(key, &disk_key);
1405 static inline u8 btrfs_key_type(struct btrfs_key *key)
1410 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1415 /* struct btrfs_header */
1416 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1417 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1419 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1420 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1421 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1422 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1424 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1426 return (btrfs_header_flags(eb) & flag) == flag;
1429 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1431 u64 flags = btrfs_header_flags(eb);
1432 btrfs_set_header_flags(eb, flags | flag);
1433 return (flags & flag) == flag;
1436 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1438 u64 flags = btrfs_header_flags(eb);
1439 btrfs_set_header_flags(eb, flags & ~flag);
1440 return (flags & flag) == flag;
1443 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1445 u64 flags = btrfs_header_flags(eb);
1446 return flags >> BTRFS_BACKREF_REV_SHIFT;
1449 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1452 u64 flags = btrfs_header_flags(eb);
1453 flags &= ~BTRFS_BACKREF_REV_MASK;
1454 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1455 btrfs_set_header_flags(eb, flags);
1458 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1460 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1464 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1466 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1470 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1472 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1476 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1478 unsigned long ptr = offsetof(struct btrfs_header, csum);
1482 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1487 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1492 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1497 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1499 return (btrfs_header_level(eb) == 0);
1502 /* struct btrfs_root_item */
1503 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1505 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1506 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1507 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1509 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1511 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1512 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1513 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1514 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1515 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1516 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1517 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1518 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1522 /* struct btrfs_super_block */
1524 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1525 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1526 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1528 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1529 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1530 struct btrfs_super_block, sys_chunk_array_size, 32);
1531 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1532 struct btrfs_super_block, chunk_root_generation, 64);
1533 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1535 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1537 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1538 chunk_root_level, 8);
1539 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1541 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1542 log_root_transid, 64);
1543 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1545 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1547 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1549 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1551 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1553 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1555 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1557 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1558 root_dir_objectid, 64);
1559 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1561 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1563 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1565 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1566 incompat_flags, 64);
1567 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1569 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1570 cache_generation, 64);
1572 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1574 int t = btrfs_super_csum_type(s);
1575 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1576 return btrfs_csum_sizes[t];
1579 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1581 return offsetof(struct btrfs_leaf, items);
1584 /* struct btrfs_file_extent_item */
1585 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1586 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
1588 static inline unsigned long btrfs_file_extent_inline_start(struct
1589 btrfs_file_extent_item *e)
1591 unsigned long offset = (unsigned long)e;
1592 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1596 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1598 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1601 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1603 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
1605 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1607 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
1609 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1610 disk_num_bytes, 64);
1611 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1613 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
1615 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1617 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
1619 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1621 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
1623 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1625 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
1627 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1629 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1630 other_encoding, 16);
1632 /* this returns the number of file bytes represented by the inline item.
1633 * If an item is compressed, this is the uncompressed size
1635 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1636 struct btrfs_file_extent_item *e)
1638 return btrfs_file_extent_ram_bytes(eb, e);
1642 * this returns the number of bytes used by the item on disk, minus the
1643 * size of any extent headers. If a file is compressed on disk, this is
1644 * the compressed size
1646 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1647 struct btrfs_item *e)
1649 unsigned long offset;
1650 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1651 return btrfs_item_size(eb, e) - offset;
1654 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1656 return root->leafsize;
1657 return root->nodesize;
1660 /* helper function to cast into the data area of the leaf. */
1661 #define btrfs_item_ptr(leaf, slot, type) \
1662 ((type *)(btrfs_leaf_data(leaf) + \
1663 btrfs_item_offset_nr(leaf, slot)))
1665 #define btrfs_item_ptr_offset(leaf, slot) \
1666 ((unsigned long)(btrfs_leaf_data(leaf) + \
1667 btrfs_item_offset_nr(leaf, slot)))
1670 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1671 struct btrfs_root *root);
1672 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1673 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1674 btrfs_fs_info *info,
1676 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1677 struct btrfs_block_group_cache
1678 *hint, u64 search_start,
1679 int data, int owner);
1680 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1681 struct btrfs_root *root,
1682 u32 blocksize, u64 root_objectid,
1683 struct btrfs_disk_key *key, int level,
1684 u64 hint, u64 empty_size);
1685 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1686 struct btrfs_root *root,
1687 u64 num_bytes, u64 parent,
1688 u64 root_objectid, u64 ref_generation,
1689 u64 owner, u64 empty_size, u64 hint_byte,
1690 u64 search_end, struct btrfs_key *ins, int data);
1691 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
1692 struct btrfs_root *root, u64 bytenr,
1693 u64 num_bytes, u64 *refs, u64 *flags);
1694 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
1695 struct btrfs_root *root,
1696 u64 bytenr, u64 num_bytes, u64 flags);
1697 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1698 struct extent_buffer *buf, int record_parent);
1699 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1700 struct extent_buffer *buf, int record_parent);
1701 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1702 struct btrfs_root *root,
1703 u64 bytenr, u64 num_bytes, u64 parent,
1704 u64 root_objectid, u64 owner, u64 offset);
1705 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1706 struct btrfs_root *root,
1707 struct extent_io_tree *unpin);
1708 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1709 struct btrfs_root *root,
1710 u64 bytenr, u64 num_bytes, u64 parent,
1711 u64 root_objectid, u64 ref_generation,
1712 u64 owner_objectid);
1713 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1714 struct btrfs_root *root, u64 bytenr,
1715 u64 orig_parent, u64 parent,
1716 u64 root_objectid, u64 ref_generation,
1717 u64 owner_objectid);
1718 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1719 struct btrfs_root *root);
1720 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1721 int btrfs_read_block_groups(struct btrfs_root *root);
1722 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1723 struct btrfs_root *root, u64 bytes_used,
1724 u64 type, u64 chunk_objectid, u64 chunk_offset,
1726 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
1727 struct btrfs_root *root);
1728 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1729 struct btrfs_root *root, u64 bytenr, u64 num,
1730 int alloc, int mark_free);
1732 int btrfs_previous_item(struct btrfs_root *root,
1733 struct btrfs_path *path, u64 min_objectid,
1735 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1736 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1737 struct btrfs_root *root, struct extent_buffer *buf,
1738 struct extent_buffer *parent, int parent_slot,
1739 struct extent_buffer **cow_ret);
1740 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
1741 struct btrfs_root *root,
1742 struct extent_buffer *buf,
1743 struct extent_buffer *parent, int parent_slot,
1744 struct extent_buffer **cow_ret,
1745 u64 search_start, u64 empty_size);
1746 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1747 struct btrfs_root *root,
1748 struct extent_buffer *buf,
1749 struct extent_buffer **cow_ret, u64 new_root_objectid);
1750 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1751 *root, struct btrfs_path *path, u32 data_size);
1752 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1753 struct btrfs_root *root,
1754 struct btrfs_path *path,
1755 u32 new_size, int from_end);
1756 int btrfs_split_item(struct btrfs_trans_handle *trans,
1757 struct btrfs_root *root,
1758 struct btrfs_path *path,
1759 struct btrfs_key *new_key,
1760 unsigned long split_offset);
1761 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1762 *root, struct btrfs_key *key, struct btrfs_path *p, int
1764 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1765 struct btrfs_root *root, struct extent_buffer *parent,
1766 int start_slot, int cache_only, u64 *last_ret,
1767 struct btrfs_key *progress);
1768 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1769 struct btrfs_path *btrfs_alloc_path(void);
1770 void btrfs_free_path(struct btrfs_path *p);
1771 void btrfs_init_path(struct btrfs_path *p);
1772 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1773 struct btrfs_path *path, int slot, int nr);
1775 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1776 struct btrfs_root *root,
1777 struct btrfs_path *path)
1779 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1782 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1783 *root, struct btrfs_key *key, void *data, u32 data_size);
1784 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1785 struct btrfs_root *root,
1786 struct btrfs_path *path,
1787 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1789 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1790 struct btrfs_root *root,
1791 struct btrfs_path *path,
1792 struct btrfs_key *key,
1795 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1798 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1799 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1800 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1801 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1803 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1804 struct btrfs_root *root, struct btrfs_path *path,
1805 struct btrfs_key *new_key);
1808 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1809 struct btrfs_root *tree_root,
1810 u64 root_id, u8 type, u64 ref_id,
1811 u64 dirid, u64 sequence,
1812 const char *name, int name_len);
1813 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1814 struct btrfs_key *key);
1815 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1816 *root, struct btrfs_key *key, struct btrfs_root_item
1818 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1819 *root, struct btrfs_key *key, struct btrfs_root_item
1821 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1822 btrfs_root_item *item, struct btrfs_key *key);
1823 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1824 struct btrfs_root *latest_root);
1826 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1827 *root, const char *name, int name_len, u64 dir,
1828 struct btrfs_key *location, u8 type, u64 index);
1829 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1830 struct btrfs_root *root,
1831 struct btrfs_path *path, u64 dir,
1832 const char *name, int name_len,
1834 struct btrfs_dir_item *
1835 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1836 struct btrfs_root *root,
1837 struct btrfs_path *path, u64 dir,
1838 u64 objectid, const char *name, int name_len,
1840 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1841 struct btrfs_path *path,
1842 const char *name, int name_len);
1843 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1844 struct btrfs_root *root,
1845 struct btrfs_path *path,
1846 struct btrfs_dir_item *di);
1847 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1848 struct btrfs_root *root, const char *name,
1849 u16 name_len, const void *data, u16 data_len,
1851 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1852 struct btrfs_root *root,
1853 struct btrfs_path *path, u64 dir,
1854 const char *name, u16 name_len,
1857 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1858 struct btrfs_root *fs_root,
1859 u64 dirid, u64 *objectid);
1860 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1863 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1864 struct btrfs_root *root,
1865 const char *name, int name_len,
1866 u64 inode_objectid, u64 ref_objectid, u64 index);
1867 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1868 struct btrfs_root *root,
1869 const char *name, int name_len,
1870 u64 inode_objectid, u64 ref_objectid);
1871 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1872 struct btrfs_root *root,
1873 struct btrfs_path *path, u64 objectid);
1874 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1875 *root, u64 objectid, struct btrfs_inode_item
1877 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1878 *root, struct btrfs_path *path,
1879 struct btrfs_key *location, int mod);
1882 int btrfs_del_csums(struct btrfs_trans_handle *trans,
1883 struct btrfs_root *root, u64 bytenr, u64 len);
1884 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1885 struct btrfs_root *root,
1886 u64 objectid, u64 pos, u64 offset,
1889 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
1890 struct btrfs_root *root, u64 objectid,
1891 u64 offset, char *buffer, size_t size);
1892 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1893 struct btrfs_root *root,
1894 struct btrfs_path *path, u64 objectid,
1895 u64 bytenr, int mod);
1896 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
1897 struct btrfs_root *root, u64 alloc_end,
1898 u64 bytenr, char *data, size_t len);
1899 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1900 struct btrfs_root *root,
1901 struct btrfs_path *path,
1902 u64 bytenr, int cow);
1903 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1904 struct btrfs_root *root, struct btrfs_path *path,