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
126 #define BTRFS_CSUM_TYPE_CRC32 0
128 static int btrfs_csum_sizes[] = { 4, 0 };
130 /* four bytes for CRC32 */
131 #define BTRFS_CRC32_SIZE 4
132 #define BTRFS_EMPTY_DIR_SIZE 0
134 #define BTRFS_FT_UNKNOWN 0
135 #define BTRFS_FT_REG_FILE 1
136 #define BTRFS_FT_DIR 2
137 #define BTRFS_FT_CHRDEV 3
138 #define BTRFS_FT_BLKDEV 4
139 #define BTRFS_FT_FIFO 5
140 #define BTRFS_FT_SOCK 6
141 #define BTRFS_FT_SYMLINK 7
142 #define BTRFS_FT_XATTR 8
143 #define BTRFS_FT_MAX 9
146 * the key defines the order in the tree, and so it also defines (optimal)
147 * block layout. objectid corresonds to the inode number. The flags
148 * tells us things about the object, and is a kind of stream selector.
149 * so for a given inode, keys with flags of 1 might refer to the inode
150 * data, flags of 2 may point to file data in the btree and flags == 3
151 * may point to extents.
153 * offset is the starting byte offset for this key in the stream.
155 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
156 * in cpu native order. Otherwise they are identical and their sizes
157 * should be the same (ie both packed)
159 struct btrfs_disk_key {
163 } __attribute__ ((__packed__));
169 } __attribute__ ((__packed__));
171 struct btrfs_mapping_tree {
172 struct cache_tree cache_tree;
175 #define BTRFS_UUID_SIZE 16
176 struct btrfs_dev_item {
177 /* the internal btrfs device id */
180 /* size of the device */
186 /* optimal io alignment for this device */
189 /* optimal io width for this device */
192 /* minimal io size for this device */
195 /* type and info about this device */
198 /* expected generation for this device */
202 * starting byte of this partition on the device,
203 * to allowr for stripe alignment in the future
207 /* grouping information for allocation decisions */
210 /* seek speed 0-100 where 100 is fastest */
213 /* bandwidth 0-100 where 100 is fastest */
216 /* btrfs generated uuid for this device */
217 u8 uuid[BTRFS_UUID_SIZE];
219 /* uuid of FS who owns this device */
220 u8 fsid[BTRFS_UUID_SIZE];
221 } __attribute__ ((__packed__));
223 struct btrfs_stripe {
226 u8 dev_uuid[BTRFS_UUID_SIZE];
227 } __attribute__ ((__packed__));
230 /* size of this chunk in bytes */
233 /* objectid of the root referencing this chunk */
239 /* optimal io alignment for this chunk */
242 /* optimal io width for this chunk */
245 /* minimal io size for this chunk */
248 /* 2^16 stripes is quite a lot, a second limit is the size of a single
253 /* sub stripes only matter for raid10 */
255 struct btrfs_stripe stripe;
256 /* additional stripes go here */
257 } __attribute__ ((__packed__));
259 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
261 BUG_ON(num_stripes == 0);
262 return sizeof(struct btrfs_chunk) +
263 sizeof(struct btrfs_stripe) * (num_stripes - 1);
266 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
267 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
268 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
269 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
271 #define BTRFS_BACKREF_REV_MAX 256
272 #define BTRFS_BACKREF_REV_SHIFT 56
273 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
274 BTRFS_BACKREF_REV_SHIFT)
276 #define BTRFS_OLD_BACKREF_REV 0
277 #define BTRFS_MIXED_BACKREF_REV 1
280 * every tree block (leaf or node) starts with this header.
282 struct btrfs_header {
283 /* these first four must match the super block */
284 u8 csum[BTRFS_CSUM_SIZE];
285 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
286 __le64 bytenr; /* which block this node is supposed to live in */
289 /* allowed to be different from the super from here on down */
290 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
295 } __attribute__ ((__packed__));
297 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
298 sizeof(struct btrfs_header)) / \
299 sizeof(struct btrfs_key_ptr))
300 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
301 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
302 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
303 sizeof(struct btrfs_item) - \
304 sizeof(struct btrfs_file_extent_item))
305 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
306 sizeof(struct btrfs_item) -\
307 sizeof(struct btrfs_dir_item))
311 * this is a very generous portion of the super block, giving us
312 * room to translate 14 chunks with 3 stripes each.
314 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
315 #define BTRFS_LABEL_SIZE 256
318 * just in case we somehow lose the roots and are not able to mount,
319 * we store an array of the roots from previous transactions
322 #define BTRFS_NUM_BACKUP_ROOTS 4
323 struct btrfs_root_backup {
325 __le64 tree_root_gen;
328 __le64 chunk_root_gen;
331 __le64 extent_root_gen;
340 __le64 csum_root_gen;
350 u8 extent_root_level;
354 /* future and to align */
356 } __attribute__ ((__packed__));
359 * the super block basically lists the main trees of the FS
360 * it currently lacks any block count etc etc
362 struct btrfs_super_block {
363 u8 csum[BTRFS_CSUM_SIZE];
364 /* the first 3 fields must match struct btrfs_header */
365 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
366 __le64 bytenr; /* this block number */
369 /* allowed to be different from the btrfs_header from here own down */
376 /* this will help find the new super based on the log root */
377 __le64 log_root_transid;
380 __le64 root_dir_objectid;
386 __le32 sys_chunk_array_size;
387 __le64 chunk_root_generation;
389 __le64 compat_ro_flags;
390 __le64 incompat_flags;
395 struct btrfs_dev_item dev_item;
397 char label[BTRFS_LABEL_SIZE];
399 __le64 cache_generation;
401 /* future expansion */
403 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
404 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
405 } __attribute__ ((__packed__));
408 * Compat flags that we support. If any incompat flags are set other than the
409 * ones specified below then we will fail to mount
411 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
412 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
413 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
414 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
416 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
417 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
418 #define BTRFS_FEATURE_INCOMPAT_SUPP \
419 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
420 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
421 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
422 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
425 * A leaf is full of items. offset and size tell us where to find
426 * the item in the leaf (relative to the start of the data area)
429 struct btrfs_disk_key key;
432 } __attribute__ ((__packed__));
435 * leaves have an item area and a data area:
436 * [item0, item1....itemN] [free space] [dataN...data1, data0]
438 * The data is separate from the items to get the keys closer together
442 struct btrfs_header header;
443 struct btrfs_item items[];
444 } __attribute__ ((__packed__));
447 * all non-leaf blocks are nodes, they hold only keys and pointers to
450 struct btrfs_key_ptr {
451 struct btrfs_disk_key key;
454 } __attribute__ ((__packed__));
457 struct btrfs_header header;
458 struct btrfs_key_ptr ptrs[];
459 } __attribute__ ((__packed__));
462 * btrfs_paths remember the path taken from the root down to the leaf.
463 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
464 * to any other levels that are present.
466 * The slots array records the index of the item or block pointer
467 * used while walking the tree.
471 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
472 int slots[BTRFS_MAX_LEVEL];
473 /* if there is real range locking, this locks field will change */
474 int locks[BTRFS_MAX_LEVEL];
476 /* keep some upper locks as we walk down */
480 * set by btrfs_split_item, tells search_slot to keep all locks
481 * and to force calls to keep space in the nodes
483 unsigned int search_for_split:1;
484 unsigned int keep_locks:1;
485 unsigned int skip_locking:1;
486 unsigned int leave_spinning:1;
490 * items in the extent btree are used to record the objectid of the
491 * owner of the block and the number of references
494 struct btrfs_extent_item {
498 } __attribute__ ((__packed__));
500 struct btrfs_extent_item_v0 {
502 } __attribute__ ((__packed__));
504 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
505 sizeof(struct btrfs_item))
507 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
508 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
510 /* following flags only apply to tree blocks */
512 /* use full backrefs for extent pointers in the block*/
513 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
515 struct btrfs_tree_block_info {
516 struct btrfs_disk_key key;
518 } __attribute__ ((__packed__));
520 struct btrfs_extent_data_ref {
525 } __attribute__ ((__packed__));
527 struct btrfs_shared_data_ref {
529 } __attribute__ ((__packed__));
531 struct btrfs_extent_inline_ref {
534 } __attribute__ ((__packed__));
536 struct btrfs_extent_ref_v0 {
541 } __attribute__ ((__packed__));
543 /* dev extents record free space on individual devices. The owner
544 * field points back to the chunk allocation mapping tree that allocated
545 * the extent. The chunk tree uuid field is a way to double check the owner
547 struct btrfs_dev_extent {
549 __le64 chunk_objectid;
552 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
553 } __attribute__ ((__packed__));
555 struct btrfs_inode_ref {
559 } __attribute__ ((__packed__));
561 struct btrfs_timespec {
564 } __attribute__ ((__packed__));
567 BTRFS_COMPRESS_NONE = 0,
568 BTRFS_COMPRESS_ZLIB = 1,
569 BTRFS_COMPRESS_LZO = 2,
570 BTRFS_COMPRESS_TYPES = 2,
571 BTRFS_COMPRESS_LAST = 3,
572 } btrfs_compression_type;
574 /* we don't understand any encryption methods right now */
576 BTRFS_ENCRYPTION_NONE = 0,
577 BTRFS_ENCRYPTION_LAST = 1,
578 } btrfs_encryption_type;
580 struct btrfs_inode_item {
581 /* nfs style generation number */
583 /* transid that last touched this inode */
595 /* modification sequence number for NFS */
599 * a little future expansion, for more than this we can
600 * just grow the inode item and version it
603 struct btrfs_timespec atime;
604 struct btrfs_timespec ctime;
605 struct btrfs_timespec mtime;
606 struct btrfs_timespec otime;
607 } __attribute__ ((__packed__));
609 struct btrfs_dir_log_item {
611 } __attribute__ ((__packed__));
613 struct btrfs_dir_item {
614 struct btrfs_disk_key location;
619 } __attribute__ ((__packed__));
621 struct btrfs_root_item {
622 struct btrfs_inode_item inode;
628 __le64 last_snapshot;
631 struct btrfs_disk_key drop_progress;
634 } __attribute__ ((__packed__));
637 * this is used for both forward and backward root refs
639 struct btrfs_root_ref {
643 } __attribute__ ((__packed__));
645 #define BTRFS_FILE_EXTENT_INLINE 0
646 #define BTRFS_FILE_EXTENT_REG 1
647 #define BTRFS_FILE_EXTENT_PREALLOC 2
649 struct btrfs_file_extent_item {
651 * transaction id that created this extent
655 * max number of bytes to hold this extent in ram
656 * when we split a compressed extent we can't know how big
657 * each of the resulting pieces will be. So, this is
658 * an upper limit on the size of the extent in ram instead of
664 * 32 bits for the various ways we might encode the data,
665 * including compression and encryption. If any of these
666 * are set to something a given disk format doesn't understand
667 * it is treated like an incompat flag for reading and writing,
672 __le16 other_encoding; /* spare for later use */
674 /* are we inline data or a real extent? */
678 * disk space consumed by the extent, checksum blocks are included
682 __le64 disk_num_bytes;
684 * the logical offset in file blocks (no csums)
685 * this extent record is for. This allows a file extent to point
686 * into the middle of an existing extent on disk, sharing it
687 * between two snapshots (useful if some bytes in the middle of the
688 * extent have changed
692 * the logical number of file blocks (no csums included)
696 } __attribute__ ((__packed__));
698 struct btrfs_csum_item {
700 } __attribute__ ((__packed__));
702 /* tag for the radix tree of block groups in ram */
703 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
704 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
705 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
706 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
707 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
708 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
709 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
710 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
712 /* used in struct btrfs_balance_args fields */
713 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
715 struct btrfs_block_group_item {
717 __le64 chunk_objectid;
719 } __attribute__ ((__packed__));
721 struct btrfs_space_info {
727 struct list_head list;
730 struct btrfs_block_group_cache {
731 struct cache_extent cache;
732 struct btrfs_key key;
733 struct btrfs_block_group_item item;
734 struct btrfs_space_info *space_info;
741 struct btrfs_extent_ops {
742 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
743 u64 hint_byte, struct btrfs_key *ins);
744 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
749 struct btrfs_fs_devices;
750 struct btrfs_fs_info {
751 u8 fsid[BTRFS_FSID_SIZE];
752 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
753 struct btrfs_root *fs_root;
754 struct btrfs_root *extent_root;
755 struct btrfs_root *tree_root;
756 struct btrfs_root *chunk_root;
757 struct btrfs_root *dev_root;
758 struct btrfs_root *csum_root;
760 struct cache_tree fs_root_cache;
762 /* the log root tree is a directory of all the other log roots */
763 struct btrfs_root *log_root_tree;
765 struct extent_io_tree extent_cache;
766 struct extent_io_tree free_space_cache;
767 struct extent_io_tree block_group_cache;
768 struct extent_io_tree pinned_extents;
769 struct extent_io_tree pending_del;
770 struct extent_io_tree extent_ins;
772 /* logical->physical extent mapping */
773 struct btrfs_mapping_tree mapping_tree;
776 u64 last_trans_committed;
778 u64 avail_data_alloc_bits;
779 u64 avail_metadata_alloc_bits;
780 u64 avail_system_alloc_bits;
781 u64 data_alloc_profile;
782 u64 metadata_alloc_profile;
783 u64 system_alloc_profile;
786 struct btrfs_trans_handle *running_transaction;
787 struct btrfs_super_block super_copy;
788 struct mutex fs_mutex;
793 struct btrfs_extent_ops *extent_ops;
794 struct list_head dirty_cowonly_roots;
796 struct btrfs_fs_devices *fs_devices;
797 struct list_head space_info;
800 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
801 struct btrfs_root *root,
802 u64 bytenr, u64 num_bytes, u64 parent,
803 u64 root_objectid, u64 owner, u64 offset,
805 struct cache_tree * fsck_extent_cache;
809 * in ram representation of the tree. extent_root is used for all allocations
810 * and for the extent tree extent_root root.
813 struct extent_buffer *node;
814 struct extent_buffer *commit_root;
815 struct btrfs_root_item root_item;
816 struct btrfs_key root_key;
817 struct btrfs_fs_info *fs_info;
821 /* data allocations are done in sectorsize units */
824 /* node allocations are done in nodesize units */
827 /* leaf allocations are done in leafsize units */
830 /* leaf allocations are done in leafsize units */
839 u64 last_inode_alloc;
841 /* the dirty list is only used by non-reference counted roots */
842 struct list_head dirty_list;
843 struct cache_extent cache;
847 * inode items have the data typically returned from stat and store other
848 * info about object characteristics. There is one for every file and dir in
851 #define BTRFS_INODE_ITEM_KEY 1
852 #define BTRFS_INODE_REF_KEY 12
853 #define BTRFS_XATTR_ITEM_KEY 24
854 #define BTRFS_ORPHAN_ITEM_KEY 48
856 #define BTRFS_DIR_LOG_ITEM_KEY 60
857 #define BTRFS_DIR_LOG_INDEX_KEY 72
859 * dir items are the name -> inode pointers in a directory. There is one
860 * for every name in a directory.
862 #define BTRFS_DIR_ITEM_KEY 84
863 #define BTRFS_DIR_INDEX_KEY 96
866 * extent data is for file data
868 #define BTRFS_EXTENT_DATA_KEY 108
871 * csum items have the checksums for data in the extents
873 #define BTRFS_CSUM_ITEM_KEY 120
875 * extent csums are stored in a separate tree and hold csums for
876 * an entire extent on disk.
878 #define BTRFS_EXTENT_CSUM_KEY 128
881 * root items point to tree roots. There are typically in the root
882 * tree used by the super block to find all the other trees
884 #define BTRFS_ROOT_ITEM_KEY 132
887 * root backrefs tie subvols and snapshots to the directory entries that
890 #define BTRFS_ROOT_BACKREF_KEY 144
893 * root refs make a fast index for listing all of the snapshots and
894 * subvolumes referenced by a given root. They point directly to the
895 * directory item in the root that references the subvol
897 #define BTRFS_ROOT_REF_KEY 156
900 * extent items are in the extent map tree. These record which blocks
901 * are used, and how many references there are to each block
903 #define BTRFS_EXTENT_ITEM_KEY 168
905 #define BTRFS_TREE_BLOCK_REF_KEY 176
907 #define BTRFS_EXTENT_DATA_REF_KEY 178
909 /* old style extent backrefs */
910 #define BTRFS_EXTENT_REF_V0_KEY 180
912 #define BTRFS_SHARED_BLOCK_REF_KEY 182
914 #define BTRFS_SHARED_DATA_REF_KEY 184
918 * block groups give us hints into the extent allocation trees. Which
919 * blocks are free etc etc
921 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
923 #define BTRFS_DEV_EXTENT_KEY 204
924 #define BTRFS_DEV_ITEM_KEY 216
925 #define BTRFS_CHUNK_ITEM_KEY 228
927 #define BTRFS_BALANCE_ITEM_KEY 248
930 * string items are for debugging. They just store a short string of
933 #define BTRFS_STRING_ITEM_KEY 253
937 #define BTRFS_INODE_NODATASUM (1 << 0)
938 #define BTRFS_INODE_NODATACOW (1 << 1)
939 #define BTRFS_INODE_READONLY (1 << 2)
941 #define read_eb_member(eb, ptr, type, member, result) ( \
942 read_extent_buffer(eb, (char *)(result), \
943 ((unsigned long)(ptr)) + \
944 offsetof(type, member), \
945 sizeof(((type *)0)->member)))
947 #define write_eb_member(eb, ptr, type, member, result) ( \
948 write_extent_buffer(eb, (char *)(result), \
949 ((unsigned long)(ptr)) + \
950 offsetof(type, member), \
951 sizeof(((type *)0)->member)))
953 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
954 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
956 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
957 return le##bits##_to_cpu(h->member); \
959 static inline void btrfs_set_##name(struct extent_buffer *eb, \
962 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
963 h->member = cpu_to_le##bits(val); \
966 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
967 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
970 unsigned long offset = (unsigned long)s; \
971 type *p = (type *) (eb->data + offset); \
972 return le##bits##_to_cpu(p->member); \
974 static inline void btrfs_set_##name(struct extent_buffer *eb, \
975 type *s, u##bits val) \
977 unsigned long offset = (unsigned long)s; \
978 type *p = (type *) (eb->data + offset); \
979 p->member = cpu_to_le##bits(val); \
982 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
983 static inline u##bits btrfs_##name(type *s) \
985 return le##bits##_to_cpu(s->member); \
987 static inline void btrfs_set_##name(type *s, u##bits val) \
989 s->member = cpu_to_le##bits(val); \
992 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
993 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
994 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
995 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
996 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
997 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
999 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1000 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1001 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1002 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1003 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1004 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1006 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1007 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1009 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1011 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1013 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1015 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1017 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1018 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1020 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1022 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1024 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1027 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1029 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1032 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1034 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1037 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1038 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1039 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1040 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1041 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1042 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1043 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1044 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1045 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1046 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1047 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1049 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1051 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1054 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1055 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1056 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1058 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1060 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1062 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1064 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1065 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1067 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1069 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1070 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1072 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1075 unsigned long offset = (unsigned long)c;
1076 offset += offsetof(struct btrfs_chunk, stripe);
1077 offset += nr * sizeof(struct btrfs_stripe);
1078 return (struct btrfs_stripe *)offset;
1081 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1083 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1086 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1087 struct btrfs_chunk *c, int nr)
1089 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1092 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1093 struct btrfs_chunk *c, int nr,
1096 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1099 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1100 struct btrfs_chunk *c, int nr)
1102 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1105 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1106 struct btrfs_chunk *c, int nr,
1109 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1112 /* struct btrfs_block_group_item */
1113 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1115 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1117 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1118 struct btrfs_block_group_item, chunk_objectid, 64);
1120 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1121 struct btrfs_block_group_item, chunk_objectid, 64);
1122 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1123 struct btrfs_block_group_item, flags, 64);
1124 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1125 struct btrfs_block_group_item, flags, 64);
1127 /* struct btrfs_inode_ref */
1128 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1129 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1130 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1132 /* struct btrfs_inode_item */
1133 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1134 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1135 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1136 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1137 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1138 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1139 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1140 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1141 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1142 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1143 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1144 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1146 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1147 struct btrfs_inode_item, generation, 64);
1148 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1149 struct btrfs_inode_item, generation, 64);
1150 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1151 struct btrfs_inode_item, size, 64);
1152 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1153 struct btrfs_inode_item, nbytes, 64);
1154 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1155 struct btrfs_inode_item, block_group, 64);
1156 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1157 struct btrfs_inode_item, nlink, 32);
1158 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1159 struct btrfs_inode_item, uid, 32);
1160 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1161 struct btrfs_inode_item, gid, 32);
1162 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1163 struct btrfs_inode_item, mode, 32);
1164 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1165 struct btrfs_inode_item, rdev, 64);
1166 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1167 struct btrfs_inode_item, flags, 64);
1169 static inline struct btrfs_timespec *
1170 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1172 unsigned long ptr = (unsigned long)inode_item;
1173 ptr += offsetof(struct btrfs_inode_item, atime);
1174 return (struct btrfs_timespec *)ptr;
1177 static inline struct btrfs_timespec *
1178 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1180 unsigned long ptr = (unsigned long)inode_item;
1181 ptr += offsetof(struct btrfs_inode_item, mtime);
1182 return (struct btrfs_timespec *)ptr;
1185 static inline struct btrfs_timespec *
1186 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1188 unsigned long ptr = (unsigned long)inode_item;
1189 ptr += offsetof(struct btrfs_inode_item, ctime);
1190 return (struct btrfs_timespec *)ptr;
1193 static inline struct btrfs_timespec *
1194 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1196 unsigned long ptr = (unsigned long)inode_item;
1197 ptr += offsetof(struct btrfs_inode_item, otime);
1198 return (struct btrfs_timespec *)ptr;
1201 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1202 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1203 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1205 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1208 /* struct btrfs_dev_extent */
1209 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1211 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1212 chunk_objectid, 64);
1213 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1215 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1217 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1219 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1220 return (u8 *)((unsigned long)dev + ptr);
1224 /* struct btrfs_extent_item */
1225 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1226 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1228 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1230 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1232 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1234 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1235 struct btrfs_tree_block_info *item,
1236 struct btrfs_disk_key *key)
1238 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1241 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1242 struct btrfs_tree_block_info *item,
1243 struct btrfs_disk_key *key)
1245 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1248 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1250 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1252 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1254 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1257 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1260 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1262 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1265 static inline u32 btrfs_extent_inline_ref_size(int type)
1267 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1268 type == BTRFS_SHARED_BLOCK_REF_KEY)
1269 return sizeof(struct btrfs_extent_inline_ref);
1270 if (type == BTRFS_SHARED_DATA_REF_KEY)
1271 return sizeof(struct btrfs_shared_data_ref) +
1272 sizeof(struct btrfs_extent_inline_ref);
1273 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1274 return sizeof(struct btrfs_extent_data_ref) +
1275 offsetof(struct btrfs_extent_inline_ref, offset);
1280 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1281 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1283 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1284 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1286 /* struct btrfs_node */
1287 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1288 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1290 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1293 ptr = offsetof(struct btrfs_node, ptrs) +
1294 sizeof(struct btrfs_key_ptr) * nr;
1295 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1298 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1302 ptr = offsetof(struct btrfs_node, ptrs) +
1303 sizeof(struct btrfs_key_ptr) * nr;
1304 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1307 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1310 ptr = offsetof(struct btrfs_node, ptrs) +
1311 sizeof(struct btrfs_key_ptr) * nr;
1312 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1315 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1319 ptr = offsetof(struct btrfs_node, ptrs) +
1320 sizeof(struct btrfs_key_ptr) * nr;
1321 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1324 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1326 return offsetof(struct btrfs_node, ptrs) +
1327 sizeof(struct btrfs_key_ptr) * nr;
1330 static inline void btrfs_node_key(struct extent_buffer *eb,
1331 struct btrfs_disk_key *disk_key, int nr)
1334 ptr = btrfs_node_key_ptr_offset(nr);
1335 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1336 struct btrfs_key_ptr, key, disk_key);
1339 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1340 struct btrfs_disk_key *disk_key, int nr)
1343 ptr = btrfs_node_key_ptr_offset(nr);
1344 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1345 struct btrfs_key_ptr, key, disk_key);
1348 /* struct btrfs_item */
1349 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1350 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1352 static inline unsigned long btrfs_item_nr_offset(int nr)
1354 return offsetof(struct btrfs_leaf, items) +
1355 sizeof(struct btrfs_item) * nr;
1358 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1361 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1364 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1365 struct btrfs_item *item)
1367 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1370 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1372 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1375 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1377 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1380 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1382 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1385 static inline void btrfs_item_key(struct extent_buffer *eb,
1386 struct btrfs_disk_key *disk_key, int nr)
1388 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1389 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1392 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1393 struct btrfs_disk_key *disk_key, int nr)
1395 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1396 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1399 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1402 * struct btrfs_root_ref
1404 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1405 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1406 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1408 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1409 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1410 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1412 /* struct btrfs_dir_item */
1413 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1414 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1415 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1416 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1418 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1419 struct btrfs_dir_item *item,
1420 struct btrfs_disk_key *key)
1422 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1425 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1426 struct btrfs_dir_item *item,
1427 struct btrfs_disk_key *key)
1429 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1432 /* struct btrfs_disk_key */
1433 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1435 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1436 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1438 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1439 struct btrfs_disk_key *disk)
1441 cpu->offset = le64_to_cpu(disk->offset);
1442 cpu->type = disk->type;
1443 cpu->objectid = le64_to_cpu(disk->objectid);
1446 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1447 struct btrfs_key *cpu)
1449 disk->offset = cpu_to_le64(cpu->offset);
1450 disk->type = cpu->type;
1451 disk->objectid = cpu_to_le64(cpu->objectid);
1454 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1455 struct btrfs_key *key, int nr)
1457 struct btrfs_disk_key disk_key;
1458 btrfs_node_key(eb, &disk_key, nr);
1459 btrfs_disk_key_to_cpu(key, &disk_key);
1462 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1463 struct btrfs_key *key, int nr)
1465 struct btrfs_disk_key disk_key;
1466 btrfs_item_key(eb, &disk_key, nr);
1467 btrfs_disk_key_to_cpu(key, &disk_key);
1470 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1471 struct btrfs_dir_item *item,
1472 struct btrfs_key *key)
1474 struct btrfs_disk_key disk_key;
1475 btrfs_dir_item_key(eb, item, &disk_key);
1476 btrfs_disk_key_to_cpu(key, &disk_key);
1480 static inline u8 btrfs_key_type(struct btrfs_key *key)
1485 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1490 /* struct btrfs_header */
1491 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1492 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1494 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1495 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1496 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1497 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1499 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1501 return (btrfs_header_flags(eb) & flag) == flag;
1504 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1506 u64 flags = btrfs_header_flags(eb);
1507 btrfs_set_header_flags(eb, flags | flag);
1508 return (flags & flag) == flag;
1511 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1513 u64 flags = btrfs_header_flags(eb);
1514 btrfs_set_header_flags(eb, flags & ~flag);
1515 return (flags & flag) == flag;
1518 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1520 u64 flags = btrfs_header_flags(eb);
1521 return flags >> BTRFS_BACKREF_REV_SHIFT;
1524 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1527 u64 flags = btrfs_header_flags(eb);
1528 flags &= ~BTRFS_BACKREF_REV_MASK;
1529 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1530 btrfs_set_header_flags(eb, flags);
1533 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1535 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1539 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1541 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1545 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1547 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1551 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1553 unsigned long ptr = offsetof(struct btrfs_header, csum);
1557 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1562 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1567 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1572 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1574 return (btrfs_header_level(eb) == 0);
1577 /* struct btrfs_root_item */
1578 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1580 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1581 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1582 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1584 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1586 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1587 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1588 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1589 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1590 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1591 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1592 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1593 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1597 /* struct btrfs_root_backup */
1598 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1600 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1602 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1603 tree_root_level, 8);
1605 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1607 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1608 chunk_root_gen, 64);
1609 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1610 chunk_root_level, 8);
1612 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1614 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1615 extent_root_gen, 64);
1616 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1617 extent_root_level, 8);
1619 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1621 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1623 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1626 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1628 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1630 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1633 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1635 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1637 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1638 csum_root_level, 8);
1639 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1641 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1643 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1646 /* struct btrfs_super_block */
1648 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1649 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1650 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1652 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1653 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1654 struct btrfs_super_block, sys_chunk_array_size, 32);
1655 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1656 struct btrfs_super_block, chunk_root_generation, 64);
1657 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1659 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1661 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1662 chunk_root_level, 8);
1663 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1665 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1666 log_root_transid, 64);
1667 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1669 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1671 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1673 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1675 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1677 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1679 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1681 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1682 root_dir_objectid, 64);
1683 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1685 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1687 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1689 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1690 incompat_flags, 64);
1691 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1693 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1694 cache_generation, 64);
1696 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1698 int t = btrfs_super_csum_type(s);
1699 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1700 return btrfs_csum_sizes[t];
1703 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1705 return offsetof(struct btrfs_leaf, items);
1708 /* struct btrfs_file_extent_item */
1709 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1710 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
1712 static inline unsigned long btrfs_file_extent_inline_start(struct
1713 btrfs_file_extent_item *e)
1715 unsigned long offset = (unsigned long)e;
1716 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1720 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1722 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1725 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1727 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
1729 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1731 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
1733 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1734 disk_num_bytes, 64);
1735 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1737 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
1739 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1741 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
1743 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1745 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
1747 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1749 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
1751 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1753 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1754 other_encoding, 16);
1756 /* this returns the number of file bytes represented by the inline item.
1757 * If an item is compressed, this is the uncompressed size
1759 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1760 struct btrfs_file_extent_item *e)
1762 return btrfs_file_extent_ram_bytes(eb, e);
1766 * this returns the number of bytes used by the item on disk, minus the
1767 * size of any extent headers. If a file is compressed on disk, this is
1768 * the compressed size
1770 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1771 struct btrfs_item *e)
1773 unsigned long offset;
1774 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1775 return btrfs_item_size(eb, e) - offset;
1778 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1780 return root->leafsize;
1781 return root->nodesize;
1784 /* helper function to cast into the data area of the leaf. */
1785 #define btrfs_item_ptr(leaf, slot, type) \
1786 ((type *)(btrfs_leaf_data(leaf) + \
1787 btrfs_item_offset_nr(leaf, slot)))
1789 #define btrfs_item_ptr_offset(leaf, slot) \
1790 ((unsigned long)(btrfs_leaf_data(leaf) + \
1791 btrfs_item_offset_nr(leaf, slot)))
1794 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
1795 struct btrfs_root *root);
1796 int btrfs_check_block_accounting(struct btrfs_root *root);
1797 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
1798 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1799 struct btrfs_root *root);
1800 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1801 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1802 btrfs_fs_info *info,
1804 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1805 struct btrfs_block_group_cache
1806 *hint, u64 search_start,
1807 int data, int owner);
1808 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1809 struct btrfs_root *root,
1810 u32 blocksize, u64 root_objectid,
1811 struct btrfs_disk_key *key, int level,
1812 u64 hint, u64 empty_size);
1813 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1814 struct btrfs_root *root,
1815 u64 num_bytes, u64 parent,
1816 u64 root_objectid, u64 ref_generation,
1817 u64 owner, u64 empty_size, u64 hint_byte,
1818 u64 search_end, struct btrfs_key *ins, int data);
1819 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
1820 struct btrfs_root *root, u64 bytenr,
1821 u64 num_bytes, u64 *refs, u64 *flags);
1822 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
1823 struct btrfs_root *root,
1824 u64 bytenr, u64 num_bytes, u64 flags);
1825 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1826 struct extent_buffer *buf, int record_parent);
1827 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1828 struct extent_buffer *buf, int record_parent);
1829 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1830 struct btrfs_root *root,
1831 u64 bytenr, u64 num_bytes, u64 parent,
1832 u64 root_objectid, u64 owner, u64 offset);
1833 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1834 struct btrfs_root *root,
1835 struct extent_io_tree *unpin);
1836 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1837 struct btrfs_root *root,
1838 u64 bytenr, u64 num_bytes, u64 parent,
1839 u64 root_objectid, u64 ref_generation,
1840 u64 owner_objectid);
1841 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1842 struct btrfs_root *root, u64 bytenr,
1843 u64 orig_parent, u64 parent,
1844 u64 root_objectid, u64 ref_generation,
1845 u64 owner_objectid);
1846 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1847 struct btrfs_root *root);
1848 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1849 int btrfs_read_block_groups(struct btrfs_root *root);
1850 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1851 struct btrfs_root *root, u64 bytes_used,
1852 u64 type, u64 chunk_objectid, u64 chunk_offset,
1854 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
1855 struct btrfs_root *root);
1856 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1857 struct btrfs_root *root, u64 bytenr, u64 num,
1858 int alloc, int mark_free);
1860 int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans,
1861 struct btrfs_root *root);
1862 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
1863 int level, int slot, u64 objectid);
1864 struct extent_buffer *read_node_slot(struct btrfs_root *root,
1865 struct extent_buffer *parent, int slot);
1866 int btrfs_previous_item(struct btrfs_root *root,
1867 struct btrfs_path *path, u64 min_objectid,
1869 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1870 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1871 struct btrfs_root *root, struct extent_buffer *buf,
1872 struct extent_buffer *parent, int parent_slot,
1873 struct extent_buffer **cow_ret);
1874 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
1875 struct btrfs_root *root,
1876 struct extent_buffer *buf,
1877 struct extent_buffer *parent, int parent_slot,
1878 struct extent_buffer **cow_ret,
1879 u64 search_start, u64 empty_size);
1880 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1881 struct btrfs_root *root,
1882 struct extent_buffer *buf,
1883 struct extent_buffer **cow_ret, u64 new_root_objectid);
1884 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1885 *root, struct btrfs_path *path, u32 data_size);
1886 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1887 struct btrfs_root *root,
1888 struct btrfs_path *path,
1889 u32 new_size, int from_end);
1890 int btrfs_split_item(struct btrfs_trans_handle *trans,
1891 struct btrfs_root *root,
1892 struct btrfs_path *path,
1893 struct btrfs_key *new_key,
1894 unsigned long split_offset);
1895 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1896 *root, struct btrfs_key *key, struct btrfs_path *p, int
1898 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1899 struct btrfs_root *root, struct extent_buffer *parent,
1900 int start_slot, int cache_only, u64 *last_ret,
1901 struct btrfs_key *progress);
1902 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1903 struct btrfs_path *btrfs_alloc_path(void);
1904 void btrfs_free_path(struct btrfs_path *p);
1905 void btrfs_init_path(struct btrfs_path *p);
1906 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1907 struct btrfs_path *path, int slot, int nr);
1909 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1910 struct btrfs_root *root,
1911 struct btrfs_path *path)
1913 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1916 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1917 *root, struct btrfs_key *key, void *data, u32 data_size);
1918 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1919 struct btrfs_root *root,
1920 struct btrfs_path *path,
1921 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1923 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1924 struct btrfs_root *root,
1925 struct btrfs_path *path,
1926 struct btrfs_key *key,
1929 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1932 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1933 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1934 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1935 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1937 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1938 struct btrfs_root *root, struct btrfs_path *path,
1939 struct btrfs_key *new_key);
1942 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1943 struct btrfs_root *tree_root,
1944 u64 root_id, u8 type, u64 ref_id,
1945 u64 dirid, u64 sequence,
1946 const char *name, int name_len);
1947 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1948 struct btrfs_key *key);
1949 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1950 *root, struct btrfs_key *key, struct btrfs_root_item
1952 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1953 *root, struct btrfs_key *key, struct btrfs_root_item
1955 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1956 btrfs_root_item *item, struct btrfs_key *key);
1957 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1958 struct btrfs_root *latest_root);
1960 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1961 *root, const char *name, int name_len, u64 dir,
1962 struct btrfs_key *location, u8 type, u64 index);
1963 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1964 struct btrfs_root *root,
1965 struct btrfs_path *path, u64 dir,
1966 const char *name, int name_len,
1968 struct btrfs_dir_item *
1969 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1970 struct btrfs_root *root,
1971 struct btrfs_path *path, u64 dir,
1972 u64 objectid, const char *name, int name_len,
1974 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1975 struct btrfs_path *path,
1976 const char *name, int name_len);
1977 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1978 struct btrfs_root *root,
1979 struct btrfs_path *path,
1980 struct btrfs_dir_item *di);
1981 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1982 struct btrfs_root *root, const char *name,
1983 u16 name_len, const void *data, u16 data_len,
1985 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1986 struct btrfs_root *root,
1987 struct btrfs_path *path, u64 dir,
1988 const char *name, u16 name_len,
1991 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1992 struct btrfs_root *fs_root,
1993 u64 dirid, u64 *objectid);
1994 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1997 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1998 struct btrfs_root *root,
1999 const char *name, int name_len,
2000 u64 inode_objectid, u64 ref_objectid, u64 index);
2001 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2002 struct btrfs_root *root,
2003 const char *name, int name_len,
2004 u64 inode_objectid, u64 ref_objectid);
2005 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2006 struct btrfs_root *root,
2007 struct btrfs_path *path, u64 objectid);
2008 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2009 *root, u64 objectid, struct btrfs_inode_item
2011 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2012 *root, struct btrfs_path *path,
2013 struct btrfs_key *location, int mod);
2016 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2017 struct btrfs_root *root, u64 bytenr, u64 len);
2018 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2019 struct btrfs_root *root,
2020 u64 objectid, u64 pos, u64 offset,
2023 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2024 struct btrfs_root *root, u64 objectid,
2025 u64 offset, char *buffer, size_t size);
2026 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2027 struct btrfs_root *root,
2028 struct btrfs_path *path, u64 objectid,
2029 u64 bytenr, int mod);
2030 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2031 struct btrfs_root *root, u64 alloc_end,
2032 u64 bytenr, char *data, size_t len);
2033 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2034 struct btrfs_root *root,
2035 struct btrfs_path *path,
2036 u64 bytenr, int cow);
2037 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2038 struct btrfs_root *root, struct btrfs_path *path,