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 struct btrfs_free_space_header {
260 struct btrfs_disk_key location;
264 } __attribute__ ((__packed__));
266 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
268 BUG_ON(num_stripes == 0);
269 return sizeof(struct btrfs_chunk) +
270 sizeof(struct btrfs_stripe) * (num_stripes - 1);
273 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
274 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
275 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
276 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
278 #define BTRFS_BACKREF_REV_MAX 256
279 #define BTRFS_BACKREF_REV_SHIFT 56
280 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
281 BTRFS_BACKREF_REV_SHIFT)
283 #define BTRFS_OLD_BACKREF_REV 0
284 #define BTRFS_MIXED_BACKREF_REV 1
287 * every tree block (leaf or node) starts with this header.
289 struct btrfs_header {
290 /* these first four must match the super block */
291 u8 csum[BTRFS_CSUM_SIZE];
292 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
293 __le64 bytenr; /* which block this node is supposed to live in */
296 /* allowed to be different from the super from here on down */
297 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
302 } __attribute__ ((__packed__));
304 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
305 sizeof(struct btrfs_header)) / \
306 sizeof(struct btrfs_key_ptr))
307 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
308 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
309 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
310 sizeof(struct btrfs_item) - \
311 sizeof(struct btrfs_file_extent_item))
312 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
313 sizeof(struct btrfs_item) -\
314 sizeof(struct btrfs_dir_item))
318 * this is a very generous portion of the super block, giving us
319 * room to translate 14 chunks with 3 stripes each.
321 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
322 #define BTRFS_LABEL_SIZE 256
325 * just in case we somehow lose the roots and are not able to mount,
326 * we store an array of the roots from previous transactions
329 #define BTRFS_NUM_BACKUP_ROOTS 4
330 struct btrfs_root_backup {
332 __le64 tree_root_gen;
335 __le64 chunk_root_gen;
338 __le64 extent_root_gen;
347 __le64 csum_root_gen;
357 u8 extent_root_level;
361 /* future and to align */
363 } __attribute__ ((__packed__));
366 * the super block basically lists the main trees of the FS
367 * it currently lacks any block count etc etc
369 struct btrfs_super_block {
370 u8 csum[BTRFS_CSUM_SIZE];
371 /* the first 3 fields must match struct btrfs_header */
372 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
373 __le64 bytenr; /* this block number */
376 /* allowed to be different from the btrfs_header from here own down */
383 /* this will help find the new super based on the log root */
384 __le64 log_root_transid;
387 __le64 root_dir_objectid;
393 __le32 sys_chunk_array_size;
394 __le64 chunk_root_generation;
396 __le64 compat_ro_flags;
397 __le64 incompat_flags;
402 struct btrfs_dev_item dev_item;
404 char label[BTRFS_LABEL_SIZE];
406 __le64 cache_generation;
408 /* future expansion */
410 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
411 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
412 } __attribute__ ((__packed__));
415 * Compat flags that we support. If any incompat flags are set other than the
416 * ones specified below then we will fail to mount
418 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
419 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
420 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
421 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
423 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
424 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
425 #define BTRFS_FEATURE_INCOMPAT_SUPP \
426 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
427 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
428 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
429 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
432 * A leaf is full of items. offset and size tell us where to find
433 * the item in the leaf (relative to the start of the data area)
436 struct btrfs_disk_key key;
439 } __attribute__ ((__packed__));
442 * leaves have an item area and a data area:
443 * [item0, item1....itemN] [free space] [dataN...data1, data0]
445 * The data is separate from the items to get the keys closer together
449 struct btrfs_header header;
450 struct btrfs_item items[];
451 } __attribute__ ((__packed__));
454 * all non-leaf blocks are nodes, they hold only keys and pointers to
457 struct btrfs_key_ptr {
458 struct btrfs_disk_key key;
461 } __attribute__ ((__packed__));
464 struct btrfs_header header;
465 struct btrfs_key_ptr ptrs[];
466 } __attribute__ ((__packed__));
469 * btrfs_paths remember the path taken from the root down to the leaf.
470 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
471 * to any other levels that are present.
473 * The slots array records the index of the item or block pointer
474 * used while walking the tree.
478 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
479 int slots[BTRFS_MAX_LEVEL];
480 /* if there is real range locking, this locks field will change */
481 int locks[BTRFS_MAX_LEVEL];
483 /* keep some upper locks as we walk down */
487 * set by btrfs_split_item, tells search_slot to keep all locks
488 * and to force calls to keep space in the nodes
490 unsigned int search_for_split:1;
491 unsigned int keep_locks:1;
492 unsigned int skip_locking:1;
493 unsigned int leave_spinning:1;
497 * items in the extent btree are used to record the objectid of the
498 * owner of the block and the number of references
501 struct btrfs_extent_item {
505 } __attribute__ ((__packed__));
507 struct btrfs_extent_item_v0 {
509 } __attribute__ ((__packed__));
511 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
512 sizeof(struct btrfs_item))
514 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
515 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
517 /* following flags only apply to tree blocks */
519 /* use full backrefs for extent pointers in the block*/
520 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
522 struct btrfs_tree_block_info {
523 struct btrfs_disk_key key;
525 } __attribute__ ((__packed__));
527 struct btrfs_extent_data_ref {
532 } __attribute__ ((__packed__));
534 struct btrfs_shared_data_ref {
536 } __attribute__ ((__packed__));
538 struct btrfs_extent_inline_ref {
541 } __attribute__ ((__packed__));
543 struct btrfs_extent_ref_v0 {
548 } __attribute__ ((__packed__));
550 /* dev extents record free space on individual devices. The owner
551 * field points back to the chunk allocation mapping tree that allocated
552 * the extent. The chunk tree uuid field is a way to double check the owner
554 struct btrfs_dev_extent {
556 __le64 chunk_objectid;
559 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
560 } __attribute__ ((__packed__));
562 struct btrfs_inode_ref {
566 } __attribute__ ((__packed__));
568 struct btrfs_timespec {
571 } __attribute__ ((__packed__));
574 BTRFS_COMPRESS_NONE = 0,
575 BTRFS_COMPRESS_ZLIB = 1,
576 BTRFS_COMPRESS_LZO = 2,
577 BTRFS_COMPRESS_TYPES = 2,
578 BTRFS_COMPRESS_LAST = 3,
579 } btrfs_compression_type;
581 /* we don't understand any encryption methods right now */
583 BTRFS_ENCRYPTION_NONE = 0,
584 BTRFS_ENCRYPTION_LAST = 1,
585 } btrfs_encryption_type;
587 struct btrfs_inode_item {
588 /* nfs style generation number */
590 /* transid that last touched this inode */
602 /* modification sequence number for NFS */
606 * a little future expansion, for more than this we can
607 * just grow the inode item and version it
610 struct btrfs_timespec atime;
611 struct btrfs_timespec ctime;
612 struct btrfs_timespec mtime;
613 struct btrfs_timespec otime;
614 } __attribute__ ((__packed__));
616 struct btrfs_dir_log_item {
618 } __attribute__ ((__packed__));
620 struct btrfs_dir_item {
621 struct btrfs_disk_key location;
626 } __attribute__ ((__packed__));
628 struct btrfs_root_item {
629 struct btrfs_inode_item inode;
635 __le64 last_snapshot;
638 struct btrfs_disk_key drop_progress;
641 } __attribute__ ((__packed__));
644 * this is used for both forward and backward root refs
646 struct btrfs_root_ref {
650 } __attribute__ ((__packed__));
652 #define BTRFS_FILE_EXTENT_INLINE 0
653 #define BTRFS_FILE_EXTENT_REG 1
654 #define BTRFS_FILE_EXTENT_PREALLOC 2
656 struct btrfs_file_extent_item {
658 * transaction id that created this extent
662 * max number of bytes to hold this extent in ram
663 * when we split a compressed extent we can't know how big
664 * each of the resulting pieces will be. So, this is
665 * an upper limit on the size of the extent in ram instead of
671 * 32 bits for the various ways we might encode the data,
672 * including compression and encryption. If any of these
673 * are set to something a given disk format doesn't understand
674 * it is treated like an incompat flag for reading and writing,
679 __le16 other_encoding; /* spare for later use */
681 /* are we inline data or a real extent? */
685 * disk space consumed by the extent, checksum blocks are included
689 __le64 disk_num_bytes;
691 * the logical offset in file blocks (no csums)
692 * this extent record is for. This allows a file extent to point
693 * into the middle of an existing extent on disk, sharing it
694 * between two snapshots (useful if some bytes in the middle of the
695 * extent have changed
699 * the logical number of file blocks (no csums included)
703 } __attribute__ ((__packed__));
705 struct btrfs_csum_item {
707 } __attribute__ ((__packed__));
709 /* tag for the radix tree of block groups in ram */
710 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
711 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
712 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
713 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
714 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
715 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
716 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
717 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
719 /* used in struct btrfs_balance_args fields */
720 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
722 struct btrfs_block_group_item {
724 __le64 chunk_objectid;
726 } __attribute__ ((__packed__));
728 struct btrfs_space_info {
734 struct list_head list;
737 struct btrfs_block_group_cache {
738 struct cache_extent cache;
739 struct btrfs_key key;
740 struct btrfs_block_group_item item;
741 struct btrfs_space_info *space_info;
748 struct btrfs_extent_ops {
749 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
750 u64 hint_byte, struct btrfs_key *ins);
751 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
756 struct btrfs_fs_devices;
757 struct btrfs_fs_info {
758 u8 fsid[BTRFS_FSID_SIZE];
759 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
760 struct btrfs_root *fs_root;
761 struct btrfs_root *extent_root;
762 struct btrfs_root *tree_root;
763 struct btrfs_root *chunk_root;
764 struct btrfs_root *dev_root;
765 struct btrfs_root *csum_root;
767 struct cache_tree fs_root_cache;
769 /* the log root tree is a directory of all the other log roots */
770 struct btrfs_root *log_root_tree;
772 struct extent_io_tree extent_cache;
773 struct extent_io_tree free_space_cache;
774 struct extent_io_tree block_group_cache;
775 struct extent_io_tree pinned_extents;
776 struct extent_io_tree pending_del;
777 struct extent_io_tree extent_ins;
779 /* logical->physical extent mapping */
780 struct btrfs_mapping_tree mapping_tree;
783 u64 last_trans_committed;
785 u64 avail_data_alloc_bits;
786 u64 avail_metadata_alloc_bits;
787 u64 avail_system_alloc_bits;
788 u64 data_alloc_profile;
789 u64 metadata_alloc_profile;
790 u64 system_alloc_profile;
793 struct btrfs_trans_handle *running_transaction;
794 struct btrfs_super_block super_copy;
795 struct mutex fs_mutex;
800 struct btrfs_extent_ops *extent_ops;
801 struct list_head dirty_cowonly_roots;
803 struct btrfs_fs_devices *fs_devices;
804 struct list_head space_info;
807 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
808 struct btrfs_root *root,
809 u64 bytenr, u64 num_bytes, u64 parent,
810 u64 root_objectid, u64 owner, u64 offset,
812 struct cache_tree *fsck_extent_cache;
813 struct cache_tree *corrupt_blocks;
817 * in ram representation of the tree. extent_root is used for all allocations
818 * and for the extent tree extent_root root.
821 struct extent_buffer *node;
822 struct extent_buffer *commit_root;
823 struct btrfs_root_item root_item;
824 struct btrfs_key root_key;
825 struct btrfs_fs_info *fs_info;
829 /* data allocations are done in sectorsize units */
832 /* node allocations are done in nodesize units */
835 /* leaf allocations are done in leafsize units */
838 /* leaf allocations are done in leafsize units */
847 u64 last_inode_alloc;
849 /* the dirty list is only used by non-reference counted roots */
850 struct list_head dirty_list;
851 struct cache_extent cache;
855 * inode items have the data typically returned from stat and store other
856 * info about object characteristics. There is one for every file and dir in
859 #define BTRFS_INODE_ITEM_KEY 1
860 #define BTRFS_INODE_REF_KEY 12
861 #define BTRFS_XATTR_ITEM_KEY 24
862 #define BTRFS_ORPHAN_ITEM_KEY 48
864 #define BTRFS_DIR_LOG_ITEM_KEY 60
865 #define BTRFS_DIR_LOG_INDEX_KEY 72
867 * dir items are the name -> inode pointers in a directory. There is one
868 * for every name in a directory.
870 #define BTRFS_DIR_ITEM_KEY 84
871 #define BTRFS_DIR_INDEX_KEY 96
874 * extent data is for file data
876 #define BTRFS_EXTENT_DATA_KEY 108
879 * csum items have the checksums for data in the extents
881 #define BTRFS_CSUM_ITEM_KEY 120
883 * extent csums are stored in a separate tree and hold csums for
884 * an entire extent on disk.
886 #define BTRFS_EXTENT_CSUM_KEY 128
889 * root items point to tree roots. There are typically in the root
890 * tree used by the super block to find all the other trees
892 #define BTRFS_ROOT_ITEM_KEY 132
895 * root backrefs tie subvols and snapshots to the directory entries that
898 #define BTRFS_ROOT_BACKREF_KEY 144
901 * root refs make a fast index for listing all of the snapshots and
902 * subvolumes referenced by a given root. They point directly to the
903 * directory item in the root that references the subvol
905 #define BTRFS_ROOT_REF_KEY 156
908 * extent items are in the extent map tree. These record which blocks
909 * are used, and how many references there are to each block
911 #define BTRFS_EXTENT_ITEM_KEY 168
913 #define BTRFS_TREE_BLOCK_REF_KEY 176
915 #define BTRFS_EXTENT_DATA_REF_KEY 178
917 /* old style extent backrefs */
918 #define BTRFS_EXTENT_REF_V0_KEY 180
920 #define BTRFS_SHARED_BLOCK_REF_KEY 182
922 #define BTRFS_SHARED_DATA_REF_KEY 184
926 * block groups give us hints into the extent allocation trees. Which
927 * blocks are free etc etc
929 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
931 #define BTRFS_DEV_EXTENT_KEY 204
932 #define BTRFS_DEV_ITEM_KEY 216
933 #define BTRFS_CHUNK_ITEM_KEY 228
935 #define BTRFS_BALANCE_ITEM_KEY 248
938 * string items are for debugging. They just store a short string of
941 #define BTRFS_STRING_ITEM_KEY 253
945 #define BTRFS_INODE_NODATASUM (1 << 0)
946 #define BTRFS_INODE_NODATACOW (1 << 1)
947 #define BTRFS_INODE_READONLY (1 << 2)
949 #define read_eb_member(eb, ptr, type, member, result) ( \
950 read_extent_buffer(eb, (char *)(result), \
951 ((unsigned long)(ptr)) + \
952 offsetof(type, member), \
953 sizeof(((type *)0)->member)))
955 #define write_eb_member(eb, ptr, type, member, result) ( \
956 write_extent_buffer(eb, (char *)(result), \
957 ((unsigned long)(ptr)) + \
958 offsetof(type, member), \
959 sizeof(((type *)0)->member)))
961 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
962 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
964 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
965 return le##bits##_to_cpu(h->member); \
967 static inline void btrfs_set_##name(struct extent_buffer *eb, \
970 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
971 h->member = cpu_to_le##bits(val); \
974 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
975 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
978 unsigned long offset = (unsigned long)s; \
979 type *p = (type *) (eb->data + offset); \
980 return le##bits##_to_cpu(p->member); \
982 static inline void btrfs_set_##name(struct extent_buffer *eb, \
983 type *s, u##bits val) \
985 unsigned long offset = (unsigned long)s; \
986 type *p = (type *) (eb->data + offset); \
987 p->member = cpu_to_le##bits(val); \
990 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
991 static inline u##bits btrfs_##name(type *s) \
993 return le##bits##_to_cpu(s->member); \
995 static inline void btrfs_set_##name(type *s, u##bits val) \
997 s->member = cpu_to_le##bits(val); \
1000 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1001 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1002 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1003 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1004 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1005 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1007 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1008 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1009 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1010 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1011 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1012 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1014 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1015 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1017 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1019 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1021 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1023 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1025 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1026 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1028 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1030 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1032 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1035 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1037 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1040 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1042 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1045 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1046 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1047 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1048 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1049 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1050 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1051 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1052 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1053 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1054 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1055 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1057 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1059 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1062 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1063 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1064 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1066 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1068 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1070 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1072 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1073 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1075 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1077 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1078 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1080 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1083 unsigned long offset = (unsigned long)c;
1084 offset += offsetof(struct btrfs_chunk, stripe);
1085 offset += nr * sizeof(struct btrfs_stripe);
1086 return (struct btrfs_stripe *)offset;
1089 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1091 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1094 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1095 struct btrfs_chunk *c, int nr)
1097 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1100 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1101 struct btrfs_chunk *c, int nr,
1104 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1107 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1108 struct btrfs_chunk *c, int nr)
1110 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1113 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1114 struct btrfs_chunk *c, int nr,
1117 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1120 /* struct btrfs_block_group_item */
1121 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1123 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1125 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1126 struct btrfs_block_group_item, chunk_objectid, 64);
1128 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1129 struct btrfs_block_group_item, chunk_objectid, 64);
1130 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1131 struct btrfs_block_group_item, flags, 64);
1132 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1133 struct btrfs_block_group_item, flags, 64);
1135 /* struct btrfs_inode_ref */
1136 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1137 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1138 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1140 /* struct btrfs_inode_item */
1141 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1142 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1143 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1144 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1145 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1146 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1147 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1148 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1149 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1150 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1151 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1152 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1154 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1155 struct btrfs_inode_item, generation, 64);
1156 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1157 struct btrfs_inode_item, generation, 64);
1158 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1159 struct btrfs_inode_item, size, 64);
1160 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1161 struct btrfs_inode_item, nbytes, 64);
1162 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1163 struct btrfs_inode_item, block_group, 64);
1164 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1165 struct btrfs_inode_item, nlink, 32);
1166 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1167 struct btrfs_inode_item, uid, 32);
1168 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1169 struct btrfs_inode_item, gid, 32);
1170 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1171 struct btrfs_inode_item, mode, 32);
1172 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1173 struct btrfs_inode_item, rdev, 64);
1174 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1175 struct btrfs_inode_item, flags, 64);
1177 static inline struct btrfs_timespec *
1178 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1180 unsigned long ptr = (unsigned long)inode_item;
1181 ptr += offsetof(struct btrfs_inode_item, atime);
1182 return (struct btrfs_timespec *)ptr;
1185 static inline struct btrfs_timespec *
1186 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1188 unsigned long ptr = (unsigned long)inode_item;
1189 ptr += offsetof(struct btrfs_inode_item, mtime);
1190 return (struct btrfs_timespec *)ptr;
1193 static inline struct btrfs_timespec *
1194 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1196 unsigned long ptr = (unsigned long)inode_item;
1197 ptr += offsetof(struct btrfs_inode_item, ctime);
1198 return (struct btrfs_timespec *)ptr;
1201 static inline struct btrfs_timespec *
1202 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1204 unsigned long ptr = (unsigned long)inode_item;
1205 ptr += offsetof(struct btrfs_inode_item, otime);
1206 return (struct btrfs_timespec *)ptr;
1209 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1210 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1211 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1213 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1216 /* struct btrfs_dev_extent */
1217 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1219 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1220 chunk_objectid, 64);
1221 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1223 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1225 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1227 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1228 return (u8 *)((unsigned long)dev + ptr);
1232 /* struct btrfs_extent_item */
1233 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1234 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1236 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1238 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1240 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1242 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1243 struct btrfs_tree_block_info *item,
1244 struct btrfs_disk_key *key)
1246 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1249 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1250 struct btrfs_tree_block_info *item,
1251 struct btrfs_disk_key *key)
1253 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1256 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1258 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1260 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1262 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1265 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1268 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1270 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1273 static inline u32 btrfs_extent_inline_ref_size(int type)
1275 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1276 type == BTRFS_SHARED_BLOCK_REF_KEY)
1277 return sizeof(struct btrfs_extent_inline_ref);
1278 if (type == BTRFS_SHARED_DATA_REF_KEY)
1279 return sizeof(struct btrfs_shared_data_ref) +
1280 sizeof(struct btrfs_extent_inline_ref);
1281 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1282 return sizeof(struct btrfs_extent_data_ref) +
1283 offsetof(struct btrfs_extent_inline_ref, offset);
1288 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1289 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1291 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1292 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1294 /* struct btrfs_node */
1295 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1296 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1298 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1301 ptr = offsetof(struct btrfs_node, ptrs) +
1302 sizeof(struct btrfs_key_ptr) * nr;
1303 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1306 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1310 ptr = offsetof(struct btrfs_node, ptrs) +
1311 sizeof(struct btrfs_key_ptr) * nr;
1312 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1315 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1318 ptr = offsetof(struct btrfs_node, ptrs) +
1319 sizeof(struct btrfs_key_ptr) * nr;
1320 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1323 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1327 ptr = offsetof(struct btrfs_node, ptrs) +
1328 sizeof(struct btrfs_key_ptr) * nr;
1329 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1332 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1334 return offsetof(struct btrfs_node, ptrs) +
1335 sizeof(struct btrfs_key_ptr) * nr;
1338 static inline void btrfs_node_key(struct extent_buffer *eb,
1339 struct btrfs_disk_key *disk_key, int nr)
1342 ptr = btrfs_node_key_ptr_offset(nr);
1343 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1344 struct btrfs_key_ptr, key, disk_key);
1347 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1348 struct btrfs_disk_key *disk_key, int nr)
1351 ptr = btrfs_node_key_ptr_offset(nr);
1352 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1353 struct btrfs_key_ptr, key, disk_key);
1356 /* struct btrfs_item */
1357 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1358 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1360 static inline unsigned long btrfs_item_nr_offset(int nr)
1362 return offsetof(struct btrfs_leaf, items) +
1363 sizeof(struct btrfs_item) * nr;
1366 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1369 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1372 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1373 struct btrfs_item *item)
1375 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1378 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1380 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1383 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1385 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1388 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1390 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1393 static inline void btrfs_item_key(struct extent_buffer *eb,
1394 struct btrfs_disk_key *disk_key, int nr)
1396 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1397 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1400 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1401 struct btrfs_disk_key *disk_key, int nr)
1403 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1404 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1407 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1410 * struct btrfs_root_ref
1412 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1413 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1414 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1416 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1417 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1418 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1420 /* struct btrfs_dir_item */
1421 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1422 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1423 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1424 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1426 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1428 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1429 struct btrfs_dir_item *item,
1430 struct btrfs_disk_key *key)
1432 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1435 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1436 struct btrfs_dir_item *item,
1437 struct btrfs_disk_key *key)
1439 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1442 /* struct btrfs_free_space_header */
1443 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1445 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1447 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1450 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1451 struct btrfs_free_space_header *h,
1452 struct btrfs_disk_key *key)
1454 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1457 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1458 struct btrfs_free_space_header *h,
1459 struct btrfs_disk_key *key)
1461 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1464 /* struct btrfs_disk_key */
1465 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1467 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1468 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1470 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1471 struct btrfs_disk_key *disk)
1473 cpu->offset = le64_to_cpu(disk->offset);
1474 cpu->type = disk->type;
1475 cpu->objectid = le64_to_cpu(disk->objectid);
1478 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1479 struct btrfs_key *cpu)
1481 disk->offset = cpu_to_le64(cpu->offset);
1482 disk->type = cpu->type;
1483 disk->objectid = cpu_to_le64(cpu->objectid);
1486 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1487 struct btrfs_key *key, int nr)
1489 struct btrfs_disk_key disk_key;
1490 btrfs_node_key(eb, &disk_key, nr);
1491 btrfs_disk_key_to_cpu(key, &disk_key);
1494 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1495 struct btrfs_key *key, int nr)
1497 struct btrfs_disk_key disk_key;
1498 btrfs_item_key(eb, &disk_key, nr);
1499 btrfs_disk_key_to_cpu(key, &disk_key);
1502 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1503 struct btrfs_dir_item *item,
1504 struct btrfs_key *key)
1506 struct btrfs_disk_key disk_key;
1507 btrfs_dir_item_key(eb, item, &disk_key);
1508 btrfs_disk_key_to_cpu(key, &disk_key);
1512 static inline u8 btrfs_key_type(struct btrfs_key *key)
1517 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1522 /* struct btrfs_header */
1523 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1524 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1526 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1527 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1528 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1529 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1531 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1533 return (btrfs_header_flags(eb) & flag) == flag;
1536 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1538 u64 flags = btrfs_header_flags(eb);
1539 btrfs_set_header_flags(eb, flags | flag);
1540 return (flags & flag) == flag;
1543 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1545 u64 flags = btrfs_header_flags(eb);
1546 btrfs_set_header_flags(eb, flags & ~flag);
1547 return (flags & flag) == flag;
1550 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1552 u64 flags = btrfs_header_flags(eb);
1553 return flags >> BTRFS_BACKREF_REV_SHIFT;
1556 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1559 u64 flags = btrfs_header_flags(eb);
1560 flags &= ~BTRFS_BACKREF_REV_MASK;
1561 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1562 btrfs_set_header_flags(eb, flags);
1565 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1567 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1571 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1573 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1577 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1579 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1583 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1585 unsigned long ptr = offsetof(struct btrfs_header, csum);
1589 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1594 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1599 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1604 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1606 return (btrfs_header_level(eb) == 0);
1609 /* struct btrfs_root_item */
1610 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1612 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1613 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1614 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1616 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1618 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1619 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1620 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1621 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1622 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1623 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1624 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1625 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1629 /* struct btrfs_root_backup */
1630 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1632 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1634 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1635 tree_root_level, 8);
1637 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1639 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1640 chunk_root_gen, 64);
1641 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1642 chunk_root_level, 8);
1644 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1646 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1647 extent_root_gen, 64);
1648 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1649 extent_root_level, 8);
1651 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1653 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1655 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1658 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1660 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1662 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1665 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1667 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1669 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1670 csum_root_level, 8);
1671 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1673 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1675 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1678 /* struct btrfs_super_block */
1680 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1681 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1682 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1684 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1685 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1686 struct btrfs_super_block, sys_chunk_array_size, 32);
1687 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1688 struct btrfs_super_block, chunk_root_generation, 64);
1689 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1691 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1693 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1694 chunk_root_level, 8);
1695 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1697 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1698 log_root_transid, 64);
1699 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1701 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1703 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1705 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1707 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1709 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1711 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1713 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1714 root_dir_objectid, 64);
1715 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1717 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1719 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1721 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1722 incompat_flags, 64);
1723 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1725 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1726 cache_generation, 64);
1728 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1730 int t = btrfs_super_csum_type(s);
1731 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1732 return btrfs_csum_sizes[t];
1735 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1737 return offsetof(struct btrfs_leaf, items);
1740 /* struct btrfs_file_extent_item */
1741 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1742 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
1744 static inline unsigned long btrfs_file_extent_inline_start(struct
1745 btrfs_file_extent_item *e)
1747 unsigned long offset = (unsigned long)e;
1748 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1752 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1754 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1757 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1759 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
1761 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1763 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
1765 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1766 disk_num_bytes, 64);
1767 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1769 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
1771 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1773 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
1775 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1777 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
1779 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1781 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
1783 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1785 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1786 other_encoding, 16);
1788 /* this returns the number of file bytes represented by the inline item.
1789 * If an item is compressed, this is the uncompressed size
1791 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1792 struct btrfs_file_extent_item *e)
1794 return btrfs_file_extent_ram_bytes(eb, e);
1798 * this returns the number of bytes used by the item on disk, minus the
1799 * size of any extent headers. If a file is compressed on disk, this is
1800 * the compressed size
1802 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1803 struct btrfs_item *e)
1805 unsigned long offset;
1806 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1807 return btrfs_item_size(eb, e) - offset;
1810 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1812 return root->leafsize;
1813 return root->nodesize;
1816 /* helper function to cast into the data area of the leaf. */
1817 #define btrfs_item_ptr(leaf, slot, type) \
1818 ((type *)(btrfs_leaf_data(leaf) + \
1819 btrfs_item_offset_nr(leaf, slot)))
1821 #define btrfs_item_ptr_offset(leaf, slot) \
1822 ((unsigned long)(btrfs_leaf_data(leaf) + \
1823 btrfs_item_offset_nr(leaf, slot)))
1826 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
1827 struct btrfs_root *root);
1828 int btrfs_check_block_accounting(struct btrfs_root *root);
1829 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
1830 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1831 struct btrfs_root *root);
1832 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1833 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1834 btrfs_fs_info *info,
1836 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1837 struct btrfs_block_group_cache
1838 *hint, u64 search_start,
1839 int data, int owner);
1840 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1841 struct btrfs_root *root,
1842 u32 blocksize, u64 root_objectid,
1843 struct btrfs_disk_key *key, int level,
1844 u64 hint, u64 empty_size);
1845 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1846 struct btrfs_root *root,
1847 u64 num_bytes, u64 parent,
1848 u64 root_objectid, u64 ref_generation,
1849 u64 owner, u64 empty_size, u64 hint_byte,
1850 u64 search_end, struct btrfs_key *ins, int data);
1851 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
1852 struct btrfs_root *root, u64 bytenr,
1853 u64 num_bytes, u64 *refs, u64 *flags);
1854 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
1855 struct btrfs_root *root,
1856 u64 bytenr, u64 num_bytes, u64 flags);
1857 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1858 struct extent_buffer *buf, int record_parent);
1859 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1860 struct extent_buffer *buf, int record_parent);
1861 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1862 struct btrfs_root *root,
1863 u64 bytenr, u64 num_bytes, u64 parent,
1864 u64 root_objectid, u64 owner, u64 offset);
1865 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1866 struct btrfs_root *root,
1867 struct extent_io_tree *unpin);
1868 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1869 struct btrfs_root *root,
1870 u64 bytenr, u64 num_bytes, u64 parent,
1871 u64 root_objectid, u64 ref_generation,
1872 u64 owner_objectid);
1873 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1874 struct btrfs_root *root, u64 bytenr,
1875 u64 orig_parent, u64 parent,
1876 u64 root_objectid, u64 ref_generation,
1877 u64 owner_objectid);
1878 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1879 struct btrfs_root *root);
1880 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1881 int btrfs_read_block_groups(struct btrfs_root *root);
1882 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1883 struct btrfs_root *root, u64 bytes_used,
1884 u64 type, u64 chunk_objectid, u64 chunk_offset,
1886 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
1887 struct btrfs_root *root);
1888 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1889 struct btrfs_root *root, u64 bytenr, u64 num,
1890 int alloc, int mark_free);
1892 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1893 struct btrfs_path *path, int level, int slot);
1894 int btrfs_check_node(struct btrfs_root *root,
1895 struct btrfs_disk_key *parent_key,
1896 struct extent_buffer *buf);
1897 int btrfs_check_leaf(struct btrfs_root *root,
1898 struct btrfs_disk_key *parent_key,
1899 struct extent_buffer *buf);
1900 int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans,
1901 struct btrfs_root *root);
1902 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
1903 int level, int slot, u64 objectid);
1904 struct extent_buffer *read_node_slot(struct btrfs_root *root,
1905 struct extent_buffer *parent, int slot);
1906 int btrfs_previous_item(struct btrfs_root *root,
1907 struct btrfs_path *path, u64 min_objectid,
1909 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1910 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1911 struct btrfs_root *root, struct extent_buffer *buf,
1912 struct extent_buffer *parent, int parent_slot,
1913 struct extent_buffer **cow_ret);
1914 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
1915 struct btrfs_root *root,
1916 struct extent_buffer *buf,
1917 struct extent_buffer *parent, int parent_slot,
1918 struct extent_buffer **cow_ret,
1919 u64 search_start, u64 empty_size);
1920 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1921 struct btrfs_root *root,
1922 struct extent_buffer *buf,
1923 struct extent_buffer **cow_ret, u64 new_root_objectid);
1924 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1925 *root, struct btrfs_path *path, u32 data_size);
1926 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1927 struct btrfs_root *root,
1928 struct btrfs_path *path,
1929 u32 new_size, int from_end);
1930 int btrfs_split_item(struct btrfs_trans_handle *trans,
1931 struct btrfs_root *root,
1932 struct btrfs_path *path,
1933 struct btrfs_key *new_key,
1934 unsigned long split_offset);
1935 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1936 *root, struct btrfs_key *key, struct btrfs_path *p, int
1938 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1939 struct btrfs_root *root, struct extent_buffer *parent,
1940 int start_slot, int cache_only, u64 *last_ret,
1941 struct btrfs_key *progress);
1942 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1943 struct btrfs_path *btrfs_alloc_path(void);
1944 void btrfs_free_path(struct btrfs_path *p);
1945 void btrfs_init_path(struct btrfs_path *p);
1946 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1947 struct btrfs_path *path, int slot, int nr);
1949 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1950 struct btrfs_root *root,
1951 struct btrfs_path *path)
1953 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1956 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1957 *root, struct btrfs_key *key, void *data, u32 data_size);
1958 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1959 struct btrfs_root *root,
1960 struct btrfs_path *path,
1961 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1963 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1964 struct btrfs_root *root,
1965 struct btrfs_path *path,
1966 struct btrfs_key *key,
1969 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1972 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1973 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1974 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1975 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1977 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1978 struct btrfs_root *root, struct btrfs_path *path,
1979 struct btrfs_key *new_key);
1982 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1983 struct btrfs_root *tree_root,
1984 u64 root_id, u8 type, u64 ref_id,
1985 u64 dirid, u64 sequence,
1986 const char *name, int name_len);
1987 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1988 struct btrfs_key *key);
1989 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1990 *root, struct btrfs_key *key, struct btrfs_root_item
1992 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1993 *root, struct btrfs_key *key, struct btrfs_root_item
1995 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1996 btrfs_root_item *item, struct btrfs_key *key);
1997 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1998 struct btrfs_root *latest_root);
2000 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2001 *root, const char *name, int name_len, u64 dir,
2002 struct btrfs_key *location, u8 type, u64 index);
2003 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2004 struct btrfs_root *root,
2005 struct btrfs_path *path, u64 dir,
2006 const char *name, int name_len,
2008 struct btrfs_dir_item *
2009 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2010 struct btrfs_root *root,
2011 struct btrfs_path *path, u64 dir,
2012 u64 objectid, const char *name, int name_len,
2014 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2015 struct btrfs_path *path,
2016 const char *name, int name_len);
2017 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2018 struct btrfs_root *root,
2019 struct btrfs_path *path,
2020 struct btrfs_dir_item *di);
2021 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2022 struct btrfs_root *root, const char *name,
2023 u16 name_len, const void *data, u16 data_len,
2025 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2026 struct btrfs_root *root,
2027 struct btrfs_path *path, u64 dir,
2028 const char *name, u16 name_len,
2031 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2032 struct btrfs_root *fs_root,
2033 u64 dirid, u64 *objectid);
2034 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2037 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2038 struct btrfs_root *root,
2039 const char *name, int name_len,
2040 u64 inode_objectid, u64 ref_objectid, u64 index);
2041 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2042 struct btrfs_root *root,
2043 const char *name, int name_len,
2044 u64 inode_objectid, u64 ref_objectid);
2045 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2046 struct btrfs_root *root,
2047 struct btrfs_path *path, u64 objectid);
2048 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2049 *root, u64 objectid, struct btrfs_inode_item
2051 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2052 *root, struct btrfs_path *path,
2053 struct btrfs_key *location, int mod);
2056 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2057 struct btrfs_root *root, u64 bytenr, u64 len);
2058 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2059 struct btrfs_root *root,
2060 u64 objectid, u64 pos, u64 offset,
2063 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2064 struct btrfs_root *root, u64 objectid,
2065 u64 offset, char *buffer, size_t size);
2066 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2067 struct btrfs_root *root,
2068 struct btrfs_path *path, u64 objectid,
2069 u64 bytenr, int mod);
2070 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2071 struct btrfs_root *root, u64 alloc_end,
2072 u64 bytenr, char *data, size_t len);
2073 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2074 struct btrfs_root *root,
2075 struct btrfs_path *path,
2076 u64 bytenr, int cow);
2077 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2078 struct btrfs_root *root, struct btrfs_path *path,