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"
30 struct btrfs_trans_handle;
31 #define BTRFS_MAGIC "_BHRfS_M"
33 #define BTRFS_MAX_LEVEL 8
35 #define BTRFS_COMPAT_EXTENT_TREE_V0
37 /* holds pointers to all of the tree roots */
38 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
40 /* stores information about which extents are in use, and reference counts */
41 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
44 * chunk tree stores translations from logical -> physical block numbering
45 * the super block points to the chunk tree
47 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
50 * stores information about which areas of a given device are in use.
51 * one per device. The tree of tree roots points to the device tree
53 #define BTRFS_DEV_TREE_OBJECTID 4ULL
55 /* one per subvolume, storing files and directories */
56 #define BTRFS_FS_TREE_OBJECTID 5ULL
58 /* directory objectid inside the root tree */
59 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
60 /* holds checksums of all the data extents */
61 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
64 /* for storing balance parameters in the root tree */
65 #define BTRFS_BALANCE_OBJECTID -4ULL
67 /* oprhan objectid for tracking unlinked/truncated files */
68 #define BTRFS_ORPHAN_OBJECTID -5ULL
70 /* does write ahead logging to speed up fsyncs */
71 #define BTRFS_TREE_LOG_OBJECTID -6ULL
72 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
75 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
76 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
79 * extent checksums all have this objectid
80 * this allows them to share the logging tree
83 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
85 /* For storing free space cache */
86 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
89 * The inode number assigned to the special inode for sotring
92 #define BTRFS_FREE_INO_OBJECTID -12ULL
94 /* dummy objectid represents multiple objectids */
95 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
98 * All files have objectids in this range.
100 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
101 #define BTRFS_LAST_FREE_OBJECTID -256ULL
102 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
107 * the device items go into the chunk tree. The key is in the form
108 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
110 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
113 * we can actually store much bigger names, but lets not confuse the rest
116 #define BTRFS_NAME_LEN 255
118 /* 32 bytes in various csum fields */
119 #define BTRFS_CSUM_SIZE 32
122 #define BTRFS_CSUM_TYPE_CRC32 0
124 static int btrfs_csum_sizes[] = { 4, 0 };
126 /* four bytes for CRC32 */
127 #define BTRFS_CRC32_SIZE 4
128 #define BTRFS_EMPTY_DIR_SIZE 0
130 #define BTRFS_FT_UNKNOWN 0
131 #define BTRFS_FT_REG_FILE 1
132 #define BTRFS_FT_DIR 2
133 #define BTRFS_FT_CHRDEV 3
134 #define BTRFS_FT_BLKDEV 4
135 #define BTRFS_FT_FIFO 5
136 #define BTRFS_FT_SOCK 6
137 #define BTRFS_FT_SYMLINK 7
138 #define BTRFS_FT_XATTR 8
139 #define BTRFS_FT_MAX 9
142 * the key defines the order in the tree, and so it also defines (optimal)
143 * block layout. objectid corresonds to the inode number. The flags
144 * tells us things about the object, and is a kind of stream selector.
145 * so for a given inode, keys with flags of 1 might refer to the inode
146 * data, flags of 2 may point to file data in the btree and flags == 3
147 * may point to extents.
149 * offset is the starting byte offset for this key in the stream.
151 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
152 * in cpu native order. Otherwise they are identical and their sizes
153 * should be the same (ie both packed)
155 struct btrfs_disk_key {
159 } __attribute__ ((__packed__));
165 } __attribute__ ((__packed__));
167 struct btrfs_mapping_tree {
168 struct cache_tree cache_tree;
171 #define BTRFS_UUID_SIZE 16
172 struct btrfs_dev_item {
173 /* the internal btrfs device id */
176 /* size of the device */
182 /* optimal io alignment for this device */
185 /* optimal io width for this device */
188 /* minimal io size for this device */
191 /* type and info about this device */
194 /* expected generation for this device */
198 * starting byte of this partition on the device,
199 * to allowr for stripe alignment in the future
203 /* grouping information for allocation decisions */
206 /* seek speed 0-100 where 100 is fastest */
209 /* bandwidth 0-100 where 100 is fastest */
212 /* btrfs generated uuid for this device */
213 u8 uuid[BTRFS_UUID_SIZE];
215 /* uuid of FS who owns this device */
216 u8 fsid[BTRFS_UUID_SIZE];
217 } __attribute__ ((__packed__));
219 struct btrfs_stripe {
222 u8 dev_uuid[BTRFS_UUID_SIZE];
223 } __attribute__ ((__packed__));
226 /* size of this chunk in bytes */
229 /* objectid of the root referencing this chunk */
235 /* optimal io alignment for this chunk */
238 /* optimal io width for this chunk */
241 /* minimal io size for this chunk */
244 /* 2^16 stripes is quite a lot, a second limit is the size of a single
249 /* sub stripes only matter for raid10 */
251 struct btrfs_stripe stripe;
252 /* additional stripes go here */
253 } __attribute__ ((__packed__));
255 struct btrfs_free_space_header {
256 struct btrfs_disk_key location;
260 } __attribute__ ((__packed__));
262 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
264 BUG_ON(num_stripes == 0);
265 return sizeof(struct btrfs_chunk) +
266 sizeof(struct btrfs_stripe) * (num_stripes - 1);
269 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
270 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
271 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
272 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
274 #define BTRFS_BACKREF_REV_MAX 256
275 #define BTRFS_BACKREF_REV_SHIFT 56
276 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
277 BTRFS_BACKREF_REV_SHIFT)
279 #define BTRFS_OLD_BACKREF_REV 0
280 #define BTRFS_MIXED_BACKREF_REV 1
283 * every tree block (leaf or node) starts with this header.
285 struct btrfs_header {
286 /* these first four must match the super block */
287 u8 csum[BTRFS_CSUM_SIZE];
288 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
289 __le64 bytenr; /* which block this node is supposed to live in */
292 /* allowed to be different from the super from here on down */
293 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
298 } __attribute__ ((__packed__));
300 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
301 sizeof(struct btrfs_header)) / \
302 sizeof(struct btrfs_key_ptr))
303 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
304 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
305 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
306 sizeof(struct btrfs_item) - \
307 sizeof(struct btrfs_file_extent_item))
308 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
309 sizeof(struct btrfs_item) -\
310 sizeof(struct btrfs_dir_item))
314 * this is a very generous portion of the super block, giving us
315 * room to translate 14 chunks with 3 stripes each.
317 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
318 #define BTRFS_LABEL_SIZE 256
321 * just in case we somehow lose the roots and are not able to mount,
322 * we store an array of the roots from previous transactions
325 #define BTRFS_NUM_BACKUP_ROOTS 4
326 struct btrfs_root_backup {
328 __le64 tree_root_gen;
331 __le64 chunk_root_gen;
334 __le64 extent_root_gen;
343 __le64 csum_root_gen;
353 u8 extent_root_level;
357 /* future and to align */
359 } __attribute__ ((__packed__));
362 * the super block basically lists the main trees of the FS
363 * it currently lacks any block count etc etc
365 struct btrfs_super_block {
366 u8 csum[BTRFS_CSUM_SIZE];
367 /* the first 3 fields must match struct btrfs_header */
368 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
369 __le64 bytenr; /* this block number */
372 /* allowed to be different from the btrfs_header from here own down */
379 /* this will help find the new super based on the log root */
380 __le64 log_root_transid;
383 __le64 root_dir_objectid;
389 __le32 sys_chunk_array_size;
390 __le64 chunk_root_generation;
392 __le64 compat_ro_flags;
393 __le64 incompat_flags;
398 struct btrfs_dev_item dev_item;
400 char label[BTRFS_LABEL_SIZE];
402 __le64 cache_generation;
404 /* future expansion */
406 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
407 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
408 } __attribute__ ((__packed__));
411 * Compat flags that we support. If any incompat flags are set other than the
412 * ones specified below then we will fail to mount
414 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
415 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
416 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
417 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
419 * some patches floated around with a second compression method
420 * lets save that incompat here for when they do get in
421 * Note we don't actually support it, we're just reserving the
424 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
427 * older kernels tried to do bigger metadata blocks, but the
428 * code was pretty buggy. Lets not let them try anymore.
430 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
433 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
434 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
435 #define BTRFS_FEATURE_INCOMPAT_SUPP \
436 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
437 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
438 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
439 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
440 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
443 * A leaf is full of items. offset and size tell us where to find
444 * the item in the leaf (relative to the start of the data area)
447 struct btrfs_disk_key key;
450 } __attribute__ ((__packed__));
453 * leaves have an item area and a data area:
454 * [item0, item1....itemN] [free space] [dataN...data1, data0]
456 * The data is separate from the items to get the keys closer together
460 struct btrfs_header header;
461 struct btrfs_item items[];
462 } __attribute__ ((__packed__));
465 * all non-leaf blocks are nodes, they hold only keys and pointers to
468 struct btrfs_key_ptr {
469 struct btrfs_disk_key key;
472 } __attribute__ ((__packed__));
475 struct btrfs_header header;
476 struct btrfs_key_ptr ptrs[];
477 } __attribute__ ((__packed__));
480 * btrfs_paths remember the path taken from the root down to the leaf.
481 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
482 * to any other levels that are present.
484 * The slots array records the index of the item or block pointer
485 * used while walking the tree.
489 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
490 int slots[BTRFS_MAX_LEVEL];
491 /* if there is real range locking, this locks field will change */
492 int locks[BTRFS_MAX_LEVEL];
494 /* keep some upper locks as we walk down */
498 * set by btrfs_split_item, tells search_slot to keep all locks
499 * and to force calls to keep space in the nodes
501 unsigned int search_for_split:1;
502 unsigned int keep_locks:1;
503 unsigned int skip_locking:1;
504 unsigned int leave_spinning:1;
508 * items in the extent btree are used to record the objectid of the
509 * owner of the block and the number of references
512 struct btrfs_extent_item {
516 } __attribute__ ((__packed__));
518 struct btrfs_extent_item_v0 {
520 } __attribute__ ((__packed__));
522 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
523 sizeof(struct btrfs_item))
525 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
526 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
528 /* following flags only apply to tree blocks */
530 /* use full backrefs for extent pointers in the block*/
531 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
533 struct btrfs_tree_block_info {
534 struct btrfs_disk_key key;
536 } __attribute__ ((__packed__));
538 struct btrfs_extent_data_ref {
543 } __attribute__ ((__packed__));
545 struct btrfs_shared_data_ref {
547 } __attribute__ ((__packed__));
549 struct btrfs_extent_inline_ref {
552 } __attribute__ ((__packed__));
554 struct btrfs_extent_ref_v0 {
559 } __attribute__ ((__packed__));
561 /* dev extents record free space on individual devices. The owner
562 * field points back to the chunk allocation mapping tree that allocated
563 * the extent. The chunk tree uuid field is a way to double check the owner
565 struct btrfs_dev_extent {
567 __le64 chunk_objectid;
570 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
571 } __attribute__ ((__packed__));
573 struct btrfs_inode_ref {
577 } __attribute__ ((__packed__));
579 struct btrfs_timespec {
582 } __attribute__ ((__packed__));
585 BTRFS_COMPRESS_NONE = 0,
586 BTRFS_COMPRESS_ZLIB = 1,
587 BTRFS_COMPRESS_LZO = 2,
588 BTRFS_COMPRESS_TYPES = 2,
589 BTRFS_COMPRESS_LAST = 3,
590 } btrfs_compression_type;
592 /* we don't understand any encryption methods right now */
594 BTRFS_ENCRYPTION_NONE = 0,
595 BTRFS_ENCRYPTION_LAST = 1,
596 } btrfs_encryption_type;
598 struct btrfs_inode_item {
599 /* nfs style generation number */
601 /* transid that last touched this inode */
613 /* modification sequence number for NFS */
617 * a little future expansion, for more than this we can
618 * just grow the inode item and version it
621 struct btrfs_timespec atime;
622 struct btrfs_timespec ctime;
623 struct btrfs_timespec mtime;
624 struct btrfs_timespec otime;
625 } __attribute__ ((__packed__));
627 struct btrfs_dir_log_item {
629 } __attribute__ ((__packed__));
631 struct btrfs_dir_item {
632 struct btrfs_disk_key location;
637 } __attribute__ ((__packed__));
639 struct btrfs_root_item {
640 struct btrfs_inode_item inode;
646 __le64 last_snapshot;
649 struct btrfs_disk_key drop_progress;
652 } __attribute__ ((__packed__));
655 * this is used for both forward and backward root refs
657 struct btrfs_root_ref {
661 } __attribute__ ((__packed__));
663 #define BTRFS_FILE_EXTENT_INLINE 0
664 #define BTRFS_FILE_EXTENT_REG 1
665 #define BTRFS_FILE_EXTENT_PREALLOC 2
667 struct btrfs_file_extent_item {
669 * transaction id that created this extent
673 * max number of bytes to hold this extent in ram
674 * when we split a compressed extent we can't know how big
675 * each of the resulting pieces will be. So, this is
676 * an upper limit on the size of the extent in ram instead of
682 * 32 bits for the various ways we might encode the data,
683 * including compression and encryption. If any of these
684 * are set to something a given disk format doesn't understand
685 * it is treated like an incompat flag for reading and writing,
690 __le16 other_encoding; /* spare for later use */
692 /* are we inline data or a real extent? */
696 * disk space consumed by the extent, checksum blocks are included
700 __le64 disk_num_bytes;
702 * the logical offset in file blocks (no csums)
703 * this extent record is for. This allows a file extent to point
704 * into the middle of an existing extent on disk, sharing it
705 * between two snapshots (useful if some bytes in the middle of the
706 * extent have changed
710 * the logical number of file blocks (no csums included)
714 } __attribute__ ((__packed__));
716 struct btrfs_csum_item {
718 } __attribute__ ((__packed__));
720 /* tag for the radix tree of block groups in ram */
721 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
722 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
723 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
724 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
725 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
726 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
727 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
728 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
730 /* used in struct btrfs_balance_args fields */
731 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
733 struct btrfs_block_group_item {
735 __le64 chunk_objectid;
737 } __attribute__ ((__packed__));
739 struct btrfs_space_info {
745 struct list_head list;
748 struct btrfs_block_group_cache {
749 struct cache_extent cache;
750 struct btrfs_key key;
751 struct btrfs_block_group_item item;
752 struct btrfs_space_info *space_info;
759 struct btrfs_extent_ops {
760 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
761 u64 hint_byte, struct btrfs_key *ins);
762 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
767 struct btrfs_fs_devices;
768 struct btrfs_fs_info {
769 u8 fsid[BTRFS_FSID_SIZE];
770 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
771 struct btrfs_root *fs_root;
772 struct btrfs_root *extent_root;
773 struct btrfs_root *tree_root;
774 struct btrfs_root *chunk_root;
775 struct btrfs_root *dev_root;
776 struct btrfs_root *csum_root;
778 struct cache_tree fs_root_cache;
780 /* the log root tree is a directory of all the other log roots */
781 struct btrfs_root *log_root_tree;
783 struct extent_io_tree extent_cache;
784 struct extent_io_tree free_space_cache;
785 struct extent_io_tree block_group_cache;
786 struct extent_io_tree pinned_extents;
787 struct extent_io_tree pending_del;
788 struct extent_io_tree extent_ins;
790 /* logical->physical extent mapping */
791 struct btrfs_mapping_tree mapping_tree;
794 u64 last_trans_committed;
796 u64 avail_data_alloc_bits;
797 u64 avail_metadata_alloc_bits;
798 u64 avail_system_alloc_bits;
799 u64 data_alloc_profile;
800 u64 metadata_alloc_profile;
801 u64 system_alloc_profile;
804 struct btrfs_trans_handle *running_transaction;
805 struct btrfs_super_block super_copy;
806 struct mutex fs_mutex;
811 struct btrfs_extent_ops *extent_ops;
812 struct list_head dirty_cowonly_roots;
814 struct btrfs_fs_devices *fs_devices;
815 struct list_head space_info;
818 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
819 struct btrfs_root *root,
820 u64 bytenr, u64 num_bytes, u64 parent,
821 u64 root_objectid, u64 owner, u64 offset,
823 struct cache_tree *fsck_extent_cache;
824 struct cache_tree *corrupt_blocks;
828 * in ram representation of the tree. extent_root is used for all allocations
829 * and for the extent tree extent_root root.
832 struct extent_buffer *node;
833 struct extent_buffer *commit_root;
834 struct btrfs_root_item root_item;
835 struct btrfs_key root_key;
836 struct btrfs_fs_info *fs_info;
840 /* data allocations are done in sectorsize units */
843 /* node allocations are done in nodesize units */
846 /* leaf allocations are done in leafsize units */
849 /* leaf allocations are done in leafsize units */
858 u64 last_inode_alloc;
860 /* the dirty list is only used by non-reference counted roots */
861 struct list_head dirty_list;
862 struct cache_extent cache;
866 * inode items have the data typically returned from stat and store other
867 * info about object characteristics. There is one for every file and dir in
870 #define BTRFS_INODE_ITEM_KEY 1
871 #define BTRFS_INODE_REF_KEY 12
872 #define BTRFS_XATTR_ITEM_KEY 24
873 #define BTRFS_ORPHAN_ITEM_KEY 48
875 #define BTRFS_DIR_LOG_ITEM_KEY 60
876 #define BTRFS_DIR_LOG_INDEX_KEY 72
878 * dir items are the name -> inode pointers in a directory. There is one
879 * for every name in a directory.
881 #define BTRFS_DIR_ITEM_KEY 84
882 #define BTRFS_DIR_INDEX_KEY 96
885 * extent data is for file data
887 #define BTRFS_EXTENT_DATA_KEY 108
890 * csum items have the checksums for data in the extents
892 #define BTRFS_CSUM_ITEM_KEY 120
894 * extent csums are stored in a separate tree and hold csums for
895 * an entire extent on disk.
897 #define BTRFS_EXTENT_CSUM_KEY 128
900 * root items point to tree roots. There are typically in the root
901 * tree used by the super block to find all the other trees
903 #define BTRFS_ROOT_ITEM_KEY 132
906 * root backrefs tie subvols and snapshots to the directory entries that
909 #define BTRFS_ROOT_BACKREF_KEY 144
912 * root refs make a fast index for listing all of the snapshots and
913 * subvolumes referenced by a given root. They point directly to the
914 * directory item in the root that references the subvol
916 #define BTRFS_ROOT_REF_KEY 156
919 * extent items are in the extent map tree. These record which blocks
920 * are used, and how many references there are to each block
922 #define BTRFS_EXTENT_ITEM_KEY 168
924 #define BTRFS_TREE_BLOCK_REF_KEY 176
926 #define BTRFS_EXTENT_DATA_REF_KEY 178
928 /* old style extent backrefs */
929 #define BTRFS_EXTENT_REF_V0_KEY 180
931 #define BTRFS_SHARED_BLOCK_REF_KEY 182
933 #define BTRFS_SHARED_DATA_REF_KEY 184
937 * block groups give us hints into the extent allocation trees. Which
938 * blocks are free etc etc
940 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
942 #define BTRFS_DEV_EXTENT_KEY 204
943 #define BTRFS_DEV_ITEM_KEY 216
944 #define BTRFS_CHUNK_ITEM_KEY 228
946 #define BTRFS_BALANCE_ITEM_KEY 248
949 * string items are for debugging. They just store a short string of
952 #define BTRFS_STRING_ITEM_KEY 253
956 #define BTRFS_INODE_NODATASUM (1 << 0)
957 #define BTRFS_INODE_NODATACOW (1 << 1)
958 #define BTRFS_INODE_READONLY (1 << 2)
960 #define read_eb_member(eb, ptr, type, member, result) ( \
961 read_extent_buffer(eb, (char *)(result), \
962 ((unsigned long)(ptr)) + \
963 offsetof(type, member), \
964 sizeof(((type *)0)->member)))
966 #define write_eb_member(eb, ptr, type, member, result) ( \
967 write_extent_buffer(eb, (char *)(result), \
968 ((unsigned long)(ptr)) + \
969 offsetof(type, member), \
970 sizeof(((type *)0)->member)))
972 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
973 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
975 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
976 return le##bits##_to_cpu(h->member); \
978 static inline void btrfs_set_##name(struct extent_buffer *eb, \
981 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
982 h->member = cpu_to_le##bits(val); \
985 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
986 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
989 unsigned long offset = (unsigned long)s; \
990 type *p = (type *) (eb->data + offset); \
991 return le##bits##_to_cpu(p->member); \
993 static inline void btrfs_set_##name(struct extent_buffer *eb, \
994 type *s, u##bits val) \
996 unsigned long offset = (unsigned long)s; \
997 type *p = (type *) (eb->data + offset); \
998 p->member = cpu_to_le##bits(val); \
1001 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1002 static inline u##bits btrfs_##name(type *s) \
1004 return le##bits##_to_cpu(s->member); \
1006 static inline void btrfs_set_##name(type *s, u##bits val) \
1008 s->member = cpu_to_le##bits(val); \
1011 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1012 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1013 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1014 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1015 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1016 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1018 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1019 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1020 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1021 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1022 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1023 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1025 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1026 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1028 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1030 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1032 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1034 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1036 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1037 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1039 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1041 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1043 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1046 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1048 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1051 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1053 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1056 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1057 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1058 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1059 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1060 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1061 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1062 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1063 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1064 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1065 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1066 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1068 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1070 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1073 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1074 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1075 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1077 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1079 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1081 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1083 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1084 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1086 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1088 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1089 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1091 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1094 unsigned long offset = (unsigned long)c;
1095 offset += offsetof(struct btrfs_chunk, stripe);
1096 offset += nr * sizeof(struct btrfs_stripe);
1097 return (struct btrfs_stripe *)offset;
1100 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1102 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1105 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1106 struct btrfs_chunk *c, int nr)
1108 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1111 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1112 struct btrfs_chunk *c, int nr,
1115 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1118 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1119 struct btrfs_chunk *c, int nr)
1121 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1124 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1125 struct btrfs_chunk *c, int nr,
1128 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1131 /* struct btrfs_block_group_item */
1132 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1134 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1136 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1137 struct btrfs_block_group_item, chunk_objectid, 64);
1139 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1140 struct btrfs_block_group_item, chunk_objectid, 64);
1141 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1142 struct btrfs_block_group_item, flags, 64);
1143 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1144 struct btrfs_block_group_item, flags, 64);
1146 /* struct btrfs_inode_ref */
1147 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1148 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1149 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1151 /* struct btrfs_inode_item */
1152 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1153 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1154 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1155 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1156 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1157 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1158 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1159 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1160 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1161 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1162 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1163 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1165 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1166 struct btrfs_inode_item, generation, 64);
1167 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1168 struct btrfs_inode_item, generation, 64);
1169 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1170 struct btrfs_inode_item, size, 64);
1171 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1172 struct btrfs_inode_item, nbytes, 64);
1173 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1174 struct btrfs_inode_item, block_group, 64);
1175 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1176 struct btrfs_inode_item, nlink, 32);
1177 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1178 struct btrfs_inode_item, uid, 32);
1179 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1180 struct btrfs_inode_item, gid, 32);
1181 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1182 struct btrfs_inode_item, mode, 32);
1183 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1184 struct btrfs_inode_item, rdev, 64);
1185 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1186 struct btrfs_inode_item, flags, 64);
1188 static inline struct btrfs_timespec *
1189 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1191 unsigned long ptr = (unsigned long)inode_item;
1192 ptr += offsetof(struct btrfs_inode_item, atime);
1193 return (struct btrfs_timespec *)ptr;
1196 static inline struct btrfs_timespec *
1197 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1199 unsigned long ptr = (unsigned long)inode_item;
1200 ptr += offsetof(struct btrfs_inode_item, mtime);
1201 return (struct btrfs_timespec *)ptr;
1204 static inline struct btrfs_timespec *
1205 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1207 unsigned long ptr = (unsigned long)inode_item;
1208 ptr += offsetof(struct btrfs_inode_item, ctime);
1209 return (struct btrfs_timespec *)ptr;
1212 static inline struct btrfs_timespec *
1213 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1215 unsigned long ptr = (unsigned long)inode_item;
1216 ptr += offsetof(struct btrfs_inode_item, otime);
1217 return (struct btrfs_timespec *)ptr;
1220 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1221 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1222 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1224 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1227 /* struct btrfs_dev_extent */
1228 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1230 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1231 chunk_objectid, 64);
1232 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1234 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1236 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1238 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1239 return (u8 *)((unsigned long)dev + ptr);
1243 /* struct btrfs_extent_item */
1244 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1245 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1247 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1249 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1251 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1253 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1254 struct btrfs_tree_block_info *item,
1255 struct btrfs_disk_key *key)
1257 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1260 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1261 struct btrfs_tree_block_info *item,
1262 struct btrfs_disk_key *key)
1264 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1267 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1269 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1271 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1273 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1276 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1279 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1281 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1284 static inline u32 btrfs_extent_inline_ref_size(int type)
1286 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1287 type == BTRFS_SHARED_BLOCK_REF_KEY)
1288 return sizeof(struct btrfs_extent_inline_ref);
1289 if (type == BTRFS_SHARED_DATA_REF_KEY)
1290 return sizeof(struct btrfs_shared_data_ref) +
1291 sizeof(struct btrfs_extent_inline_ref);
1292 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1293 return sizeof(struct btrfs_extent_data_ref) +
1294 offsetof(struct btrfs_extent_inline_ref, offset);
1299 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1300 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1302 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1303 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1305 /* struct btrfs_node */
1306 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1307 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1309 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1312 ptr = offsetof(struct btrfs_node, ptrs) +
1313 sizeof(struct btrfs_key_ptr) * nr;
1314 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1317 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1321 ptr = offsetof(struct btrfs_node, ptrs) +
1322 sizeof(struct btrfs_key_ptr) * nr;
1323 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1326 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1329 ptr = offsetof(struct btrfs_node, ptrs) +
1330 sizeof(struct btrfs_key_ptr) * nr;
1331 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1334 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1338 ptr = offsetof(struct btrfs_node, ptrs) +
1339 sizeof(struct btrfs_key_ptr) * nr;
1340 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1343 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1345 return offsetof(struct btrfs_node, ptrs) +
1346 sizeof(struct btrfs_key_ptr) * nr;
1349 static inline void btrfs_node_key(struct extent_buffer *eb,
1350 struct btrfs_disk_key *disk_key, int nr)
1353 ptr = btrfs_node_key_ptr_offset(nr);
1354 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1355 struct btrfs_key_ptr, key, disk_key);
1358 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1359 struct btrfs_disk_key *disk_key, int nr)
1362 ptr = btrfs_node_key_ptr_offset(nr);
1363 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1364 struct btrfs_key_ptr, key, disk_key);
1367 /* struct btrfs_item */
1368 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1369 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1371 static inline unsigned long btrfs_item_nr_offset(int nr)
1373 return offsetof(struct btrfs_leaf, items) +
1374 sizeof(struct btrfs_item) * nr;
1377 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1380 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1383 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1384 struct btrfs_item *item)
1386 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1389 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1391 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1394 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1396 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1399 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1401 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1404 static inline void btrfs_item_key(struct extent_buffer *eb,
1405 struct btrfs_disk_key *disk_key, int nr)
1407 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1408 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1411 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1412 struct btrfs_disk_key *disk_key, int nr)
1414 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1415 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1418 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1421 * struct btrfs_root_ref
1423 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1424 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1425 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1427 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1428 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1429 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1431 /* struct btrfs_dir_item */
1432 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1433 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1434 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1435 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1437 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1439 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1440 struct btrfs_dir_item *item,
1441 struct btrfs_disk_key *key)
1443 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1446 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1447 struct btrfs_dir_item *item,
1448 struct btrfs_disk_key *key)
1450 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1453 /* struct btrfs_free_space_header */
1454 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1456 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1458 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1461 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1462 struct btrfs_free_space_header *h,
1463 struct btrfs_disk_key *key)
1465 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1468 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1469 struct btrfs_free_space_header *h,
1470 struct btrfs_disk_key *key)
1472 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1475 /* struct btrfs_disk_key */
1476 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1478 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1479 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1481 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1482 struct btrfs_disk_key *disk)
1484 cpu->offset = le64_to_cpu(disk->offset);
1485 cpu->type = disk->type;
1486 cpu->objectid = le64_to_cpu(disk->objectid);
1489 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1490 struct btrfs_key *cpu)
1492 disk->offset = cpu_to_le64(cpu->offset);
1493 disk->type = cpu->type;
1494 disk->objectid = cpu_to_le64(cpu->objectid);
1497 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1498 struct btrfs_key *key, int nr)
1500 struct btrfs_disk_key disk_key;
1501 btrfs_node_key(eb, &disk_key, nr);
1502 btrfs_disk_key_to_cpu(key, &disk_key);
1505 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1506 struct btrfs_key *key, int nr)
1508 struct btrfs_disk_key disk_key;
1509 btrfs_item_key(eb, &disk_key, nr);
1510 btrfs_disk_key_to_cpu(key, &disk_key);
1513 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1514 struct btrfs_dir_item *item,
1515 struct btrfs_key *key)
1517 struct btrfs_disk_key disk_key;
1518 btrfs_dir_item_key(eb, item, &disk_key);
1519 btrfs_disk_key_to_cpu(key, &disk_key);
1523 static inline u8 btrfs_key_type(struct btrfs_key *key)
1528 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1533 /* struct btrfs_header */
1534 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1535 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1537 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1538 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1539 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1540 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1542 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1544 return (btrfs_header_flags(eb) & flag) == flag;
1547 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1549 u64 flags = btrfs_header_flags(eb);
1550 btrfs_set_header_flags(eb, flags | flag);
1551 return (flags & flag) == flag;
1554 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1556 u64 flags = btrfs_header_flags(eb);
1557 btrfs_set_header_flags(eb, flags & ~flag);
1558 return (flags & flag) == flag;
1561 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1563 u64 flags = btrfs_header_flags(eb);
1564 return flags >> BTRFS_BACKREF_REV_SHIFT;
1567 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1570 u64 flags = btrfs_header_flags(eb);
1571 flags &= ~BTRFS_BACKREF_REV_MASK;
1572 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1573 btrfs_set_header_flags(eb, flags);
1576 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1578 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1582 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1584 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1588 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1590 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1594 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1596 unsigned long ptr = offsetof(struct btrfs_header, csum);
1600 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1605 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1610 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1615 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1617 return (btrfs_header_level(eb) == 0);
1620 /* struct btrfs_root_item */
1621 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1623 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1624 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1625 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1627 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1629 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1630 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1631 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1632 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1633 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1634 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1635 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1636 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1640 /* struct btrfs_root_backup */
1641 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1643 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1645 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1646 tree_root_level, 8);
1648 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1650 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1651 chunk_root_gen, 64);
1652 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1653 chunk_root_level, 8);
1655 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1657 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1658 extent_root_gen, 64);
1659 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1660 extent_root_level, 8);
1662 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1664 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1666 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1669 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1671 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1673 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1676 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1678 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1680 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1681 csum_root_level, 8);
1682 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1684 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1686 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1689 /* struct btrfs_super_block */
1691 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1692 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1693 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1695 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1696 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1697 struct btrfs_super_block, sys_chunk_array_size, 32);
1698 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1699 struct btrfs_super_block, chunk_root_generation, 64);
1700 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1702 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1704 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1705 chunk_root_level, 8);
1706 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1708 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1709 log_root_transid, 64);
1710 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1712 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1714 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1716 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1718 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1720 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1722 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1724 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1725 root_dir_objectid, 64);
1726 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1728 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1730 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1732 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1733 incompat_flags, 64);
1734 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1736 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1737 cache_generation, 64);
1739 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1741 int t = btrfs_super_csum_type(s);
1742 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1743 return btrfs_csum_sizes[t];
1746 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1748 return offsetof(struct btrfs_leaf, items);
1751 /* struct btrfs_file_extent_item */
1752 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1753 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
1755 static inline unsigned long btrfs_file_extent_inline_start(struct
1756 btrfs_file_extent_item *e)
1758 unsigned long offset = (unsigned long)e;
1759 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1763 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1765 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1768 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1770 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
1772 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1774 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
1776 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1777 disk_num_bytes, 64);
1778 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1780 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
1782 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1784 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
1786 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1788 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
1790 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1792 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
1794 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1796 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1797 other_encoding, 16);
1799 /* this returns the number of file bytes represented by the inline item.
1800 * If an item is compressed, this is the uncompressed size
1802 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1803 struct btrfs_file_extent_item *e)
1805 return btrfs_file_extent_ram_bytes(eb, e);
1809 * this returns the number of bytes used by the item on disk, minus the
1810 * size of any extent headers. If a file is compressed on disk, this is
1811 * the compressed size
1813 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1814 struct btrfs_item *e)
1816 unsigned long offset;
1817 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1818 return btrfs_item_size(eb, e) - offset;
1821 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1823 return root->leafsize;
1824 return root->nodesize;
1827 /* helper function to cast into the data area of the leaf. */
1828 #define btrfs_item_ptr(leaf, slot, type) \
1829 ((type *)(btrfs_leaf_data(leaf) + \
1830 btrfs_item_offset_nr(leaf, slot)))
1832 #define btrfs_item_ptr_offset(leaf, slot) \
1833 ((unsigned long)(btrfs_leaf_data(leaf) + \
1834 btrfs_item_offset_nr(leaf, slot)))
1837 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
1838 struct btrfs_root *root);
1839 int btrfs_check_block_accounting(struct btrfs_root *root);
1840 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
1841 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1842 struct btrfs_root *root);
1843 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1844 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1845 btrfs_fs_info *info,
1847 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1848 struct btrfs_block_group_cache
1849 *hint, u64 search_start,
1850 int data, int owner);
1851 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1852 struct btrfs_root *root,
1853 u32 blocksize, u64 root_objectid,
1854 struct btrfs_disk_key *key, int level,
1855 u64 hint, u64 empty_size);
1856 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1857 struct btrfs_root *root,
1858 u64 num_bytes, u64 parent,
1859 u64 root_objectid, u64 ref_generation,
1860 u64 owner, u64 empty_size, u64 hint_byte,
1861 u64 search_end, struct btrfs_key *ins, int data);
1862 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
1863 struct btrfs_root *root, u64 bytenr,
1864 u64 num_bytes, u64 *refs, u64 *flags);
1865 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
1866 struct btrfs_root *root,
1867 u64 bytenr, u64 num_bytes, u64 flags);
1868 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1869 struct extent_buffer *buf, int record_parent);
1870 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1871 struct extent_buffer *buf, int record_parent);
1872 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1873 struct btrfs_root *root,
1874 u64 bytenr, u64 num_bytes, u64 parent,
1875 u64 root_objectid, u64 owner, u64 offset);
1876 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1877 struct btrfs_root *root,
1878 struct extent_io_tree *unpin);
1879 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1880 struct btrfs_root *root,
1881 u64 bytenr, u64 num_bytes, u64 parent,
1882 u64 root_objectid, u64 ref_generation,
1883 u64 owner_objectid);
1884 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1885 struct btrfs_root *root, u64 bytenr,
1886 u64 orig_parent, u64 parent,
1887 u64 root_objectid, u64 ref_generation,
1888 u64 owner_objectid);
1889 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1890 struct btrfs_root *root);
1891 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1892 int btrfs_read_block_groups(struct btrfs_root *root);
1893 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1894 struct btrfs_root *root, u64 bytes_used,
1895 u64 type, u64 chunk_objectid, u64 chunk_offset,
1897 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
1898 struct btrfs_root *root);
1899 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1900 struct btrfs_root *root, u64 bytenr, u64 num,
1901 int alloc, int mark_free);
1903 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1904 struct btrfs_path *path, int level, int slot);
1905 int btrfs_check_node(struct btrfs_root *root,
1906 struct btrfs_disk_key *parent_key,
1907 struct extent_buffer *buf);
1908 int btrfs_check_leaf(struct btrfs_root *root,
1909 struct btrfs_disk_key *parent_key,
1910 struct extent_buffer *buf);
1911 int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans,
1912 struct btrfs_root *root);
1913 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
1914 int level, int slot, u64 objectid);
1915 struct extent_buffer *read_node_slot(struct btrfs_root *root,
1916 struct extent_buffer *parent, int slot);
1917 int btrfs_previous_item(struct btrfs_root *root,
1918 struct btrfs_path *path, u64 min_objectid,
1920 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1921 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1922 struct btrfs_root *root, struct extent_buffer *buf,
1923 struct extent_buffer *parent, int parent_slot,
1924 struct extent_buffer **cow_ret);
1925 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
1926 struct btrfs_root *root,
1927 struct extent_buffer *buf,
1928 struct extent_buffer *parent, int parent_slot,
1929 struct extent_buffer **cow_ret,
1930 u64 search_start, u64 empty_size);
1931 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1932 struct btrfs_root *root,
1933 struct extent_buffer *buf,
1934 struct extent_buffer **cow_ret, u64 new_root_objectid);
1935 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1936 *root, struct btrfs_path *path, u32 data_size);
1937 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1938 struct btrfs_root *root,
1939 struct btrfs_path *path,
1940 u32 new_size, int from_end);
1941 int btrfs_split_item(struct btrfs_trans_handle *trans,
1942 struct btrfs_root *root,
1943 struct btrfs_path *path,
1944 struct btrfs_key *new_key,
1945 unsigned long split_offset);
1946 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1947 *root, struct btrfs_key *key, struct btrfs_path *p, int
1949 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1950 struct btrfs_root *root, struct extent_buffer *parent,
1951 int start_slot, int cache_only, u64 *last_ret,
1952 struct btrfs_key *progress);
1953 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1954 struct btrfs_path *btrfs_alloc_path(void);
1955 void btrfs_free_path(struct btrfs_path *p);
1956 void btrfs_init_path(struct btrfs_path *p);
1957 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1958 struct btrfs_path *path, int slot, int nr);
1960 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1961 struct btrfs_root *root,
1962 struct btrfs_path *path)
1964 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1967 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1968 *root, struct btrfs_key *key, void *data, u32 data_size);
1969 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1970 struct btrfs_root *root,
1971 struct btrfs_path *path,
1972 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1974 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1975 struct btrfs_root *root,
1976 struct btrfs_path *path,
1977 struct btrfs_key *key,
1980 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1983 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1984 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1985 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1986 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1988 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1989 struct btrfs_root *root, struct btrfs_path *path,
1990 struct btrfs_key *new_key);
1993 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1994 struct btrfs_root *tree_root,
1995 u64 root_id, u8 type, u64 ref_id,
1996 u64 dirid, u64 sequence,
1997 const char *name, int name_len);
1998 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1999 struct btrfs_key *key);
2000 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2001 *root, struct btrfs_key *key, struct btrfs_root_item
2003 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2004 *root, struct btrfs_key *key, struct btrfs_root_item
2006 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2007 btrfs_root_item *item, struct btrfs_key *key);
2008 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
2009 struct btrfs_root *latest_root);
2011 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2012 *root, const char *name, int name_len, u64 dir,
2013 struct btrfs_key *location, u8 type, u64 index);
2014 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2015 struct btrfs_root *root,
2016 struct btrfs_path *path, u64 dir,
2017 const char *name, int name_len,
2019 struct btrfs_dir_item *
2020 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2021 struct btrfs_root *root,
2022 struct btrfs_path *path, u64 dir,
2023 u64 objectid, const char *name, int name_len,
2025 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2026 struct btrfs_path *path,
2027 const char *name, int name_len);
2028 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2029 struct btrfs_root *root,
2030 struct btrfs_path *path,
2031 struct btrfs_dir_item *di);
2032 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2033 struct btrfs_root *root, const char *name,
2034 u16 name_len, const void *data, u16 data_len,
2036 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2037 struct btrfs_root *root,
2038 struct btrfs_path *path, u64 dir,
2039 const char *name, u16 name_len,
2042 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2043 struct btrfs_root *fs_root,
2044 u64 dirid, u64 *objectid);
2045 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2048 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2049 struct btrfs_root *root,
2050 const char *name, int name_len,
2051 u64 inode_objectid, u64 ref_objectid, u64 index);
2052 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2053 struct btrfs_root *root,
2054 const char *name, int name_len,
2055 u64 inode_objectid, u64 ref_objectid);
2056 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2057 struct btrfs_root *root,
2058 struct btrfs_path *path, u64 objectid);
2059 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2060 *root, u64 objectid, struct btrfs_inode_item
2062 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2063 *root, struct btrfs_path *path,
2064 struct btrfs_key *location, int mod);
2067 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2068 struct btrfs_root *root, u64 bytenr, u64 len);
2069 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2070 struct btrfs_root *root,
2071 u64 objectid, u64 pos, u64 offset,
2074 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2075 struct btrfs_root *root, u64 objectid,
2076 u64 offset, char *buffer, size_t size);
2077 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2078 struct btrfs_root *root,
2079 struct btrfs_path *path, u64 objectid,
2080 u64 bytenr, int mod);
2081 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2082 struct btrfs_root *root, u64 alloc_end,
2083 u64 bytenr, char *data, size_t len);
2084 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2085 struct btrfs_root *root,
2086 struct btrfs_path *path,
2087 u64 bytenr, int cow);
2088 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2089 struct btrfs_root *root, struct btrfs_path *path,