2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
23 #include "kerncompat.h"
24 #include "radix-tree.h"
25 #include "extent-cache.h"
26 #include "extent_io.h"
30 struct btrfs_trans_handle;
31 #define BTRFS_MAGIC "_BHRfS_M"
33 #define BTRFS_MAX_LEVEL 8
35 #define BTRFS_COMPAT_EXTENT_TREE_V0
37 /* holds pointers to all of the tree roots */
38 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
40 /* stores information about which extents are in use, and reference counts */
41 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
44 * chunk tree stores translations from logical -> physical block numbering
45 * the super block points to the chunk tree
47 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
50 * stores information about which areas of a given device are in use.
51 * one per device. The tree of tree roots points to the device tree
53 #define BTRFS_DEV_TREE_OBJECTID 4ULL
55 /* one per subvolume, storing files and directories */
56 #define BTRFS_FS_TREE_OBJECTID 5ULL
58 /* directory objectid inside the root tree */
59 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
60 /* holds checksums of all the data extents */
61 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
64 /* for storing balance parameters in the root tree */
65 #define BTRFS_BALANCE_OBJECTID -4ULL
67 /* oprhan objectid for tracking unlinked/truncated files */
68 #define BTRFS_ORPHAN_OBJECTID -5ULL
70 /* does write ahead logging to speed up fsyncs */
71 #define BTRFS_TREE_LOG_OBJECTID -6ULL
72 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
75 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
76 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
79 * extent checksums all have this objectid
80 * this allows them to share the logging tree
83 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
85 /* For storing free space cache */
86 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
89 * The inode number assigned to the special inode for sotring
92 #define BTRFS_FREE_INO_OBJECTID -12ULL
94 /* dummy objectid represents multiple objectids */
95 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
98 * All files have objectids in this range.
100 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
101 #define BTRFS_LAST_FREE_OBJECTID -256ULL
102 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
107 * the device items go into the chunk tree. The key is in the form
108 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
110 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
113 * we can actually store much bigger names, but lets not confuse the rest
116 #define BTRFS_NAME_LEN 255
118 /* 32 bytes in various csum fields */
119 #define BTRFS_CSUM_SIZE 32
122 #define BTRFS_CSUM_TYPE_CRC32 0
124 static int btrfs_csum_sizes[] = { 4, 0 };
126 /* four bytes for CRC32 */
127 #define BTRFS_CRC32_SIZE 4
128 #define BTRFS_EMPTY_DIR_SIZE 0
130 #define BTRFS_FT_UNKNOWN 0
131 #define BTRFS_FT_REG_FILE 1
132 #define BTRFS_FT_DIR 2
133 #define BTRFS_FT_CHRDEV 3
134 #define BTRFS_FT_BLKDEV 4
135 #define BTRFS_FT_FIFO 5
136 #define BTRFS_FT_SOCK 6
137 #define BTRFS_FT_SYMLINK 7
138 #define BTRFS_FT_XATTR 8
139 #define BTRFS_FT_MAX 9
142 * the key defines the order in the tree, and so it also defines (optimal)
143 * block layout. objectid corresonds to the inode number. The flags
144 * tells us things about the object, and is a kind of stream selector.
145 * so for a given inode, keys with flags of 1 might refer to the inode
146 * data, flags of 2 may point to file data in the btree and flags == 3
147 * may point to extents.
149 * offset is the starting byte offset for this key in the stream.
151 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
152 * in cpu native order. Otherwise they are identical and their sizes
153 * should be the same (ie both packed)
155 struct btrfs_disk_key {
159 } __attribute__ ((__packed__));
165 } __attribute__ ((__packed__));
167 struct btrfs_mapping_tree {
168 struct cache_tree cache_tree;
171 #define BTRFS_UUID_SIZE 16
172 struct btrfs_dev_item {
173 /* the internal btrfs device id */
176 /* size of the device */
182 /* optimal io alignment for this device */
185 /* optimal io width for this device */
188 /* minimal io size for this device */
191 /* type and info about this device */
194 /* expected generation for this device */
198 * starting byte of this partition on the device,
199 * to allowr for stripe alignment in the future
203 /* grouping information for allocation decisions */
206 /* seek speed 0-100 where 100 is fastest */
209 /* bandwidth 0-100 where 100 is fastest */
212 /* btrfs generated uuid for this device */
213 u8 uuid[BTRFS_UUID_SIZE];
215 /* uuid of FS who owns this device */
216 u8 fsid[BTRFS_UUID_SIZE];
217 } __attribute__ ((__packed__));
219 struct btrfs_stripe {
222 u8 dev_uuid[BTRFS_UUID_SIZE];
223 } __attribute__ ((__packed__));
226 /* size of this chunk in bytes */
229 /* objectid of the root referencing this chunk */
235 /* optimal io alignment for this chunk */
238 /* optimal io width for this chunk */
241 /* minimal io size for this chunk */
244 /* 2^16 stripes is quite a lot, a second limit is the size of a single
249 /* sub stripes only matter for raid10 */
251 struct btrfs_stripe stripe;
252 /* additional stripes go here */
253 } __attribute__ ((__packed__));
255 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
257 BUG_ON(num_stripes == 0);
258 return sizeof(struct btrfs_chunk) +
259 sizeof(struct btrfs_stripe) * (num_stripes - 1);
262 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
263 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
264 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
265 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
267 #define BTRFS_BACKREF_REV_MAX 256
268 #define BTRFS_BACKREF_REV_SHIFT 56
269 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
270 BTRFS_BACKREF_REV_SHIFT)
272 #define BTRFS_OLD_BACKREF_REV 0
273 #define BTRFS_MIXED_BACKREF_REV 1
276 * every tree block (leaf or node) starts with this header.
278 struct btrfs_header {
279 /* these first four must match the super block */
280 u8 csum[BTRFS_CSUM_SIZE];
281 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
282 __le64 bytenr; /* which block this node is supposed to live in */
285 /* allowed to be different from the super from here on down */
286 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
291 } __attribute__ ((__packed__));
293 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
294 sizeof(struct btrfs_header)) / \
295 sizeof(struct btrfs_key_ptr))
296 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
297 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
298 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
299 sizeof(struct btrfs_item) - \
300 sizeof(struct btrfs_file_extent_item))
301 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
302 sizeof(struct btrfs_item) -\
303 sizeof(struct btrfs_dir_item))
307 * this is a very generous portion of the super block, giving us
308 * room to translate 14 chunks with 3 stripes each.
310 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
311 #define BTRFS_LABEL_SIZE 256
314 * just in case we somehow lose the roots and are not able to mount,
315 * we store an array of the roots from previous transactions
318 #define BTRFS_NUM_BACKUP_ROOTS 4
319 struct btrfs_root_backup {
321 __le64 tree_root_gen;
324 __le64 chunk_root_gen;
327 __le64 extent_root_gen;
336 __le64 csum_root_gen;
346 u8 extent_root_level;
350 /* future and to align */
352 } __attribute__ ((__packed__));
355 * the super block basically lists the main trees of the FS
356 * it currently lacks any block count etc etc
358 struct btrfs_super_block {
359 u8 csum[BTRFS_CSUM_SIZE];
360 /* the first 3 fields must match struct btrfs_header */
361 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
362 __le64 bytenr; /* this block number */
365 /* allowed to be different from the btrfs_header from here own down */
372 /* this will help find the new super based on the log root */
373 __le64 log_root_transid;
376 __le64 root_dir_objectid;
382 __le32 sys_chunk_array_size;
383 __le64 chunk_root_generation;
385 __le64 compat_ro_flags;
386 __le64 incompat_flags;
391 struct btrfs_dev_item dev_item;
393 char label[BTRFS_LABEL_SIZE];
395 __le64 cache_generation;
397 /* future expansion */
399 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
400 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
401 } __attribute__ ((__packed__));
404 * Compat flags that we support. If any incompat flags are set other than the
405 * ones specified below then we will fail to mount
407 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
408 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
409 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
410 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
412 * some patches floated around with a second compression method
413 * lets save that incompat here for when they do get in
414 * Note we don't actually support it, we're just reserving the
417 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
420 * older kernels tried to do bigger metadata blocks, but the
421 * code was pretty buggy. Lets not let them try anymore.
423 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
426 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
427 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
428 #define BTRFS_FEATURE_INCOMPAT_SUPP \
429 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
430 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
431 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
432 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
433 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
436 * A leaf is full of items. offset and size tell us where to find
437 * the item in the leaf (relative to the start of the data area)
440 struct btrfs_disk_key key;
443 } __attribute__ ((__packed__));
446 * leaves have an item area and a data area:
447 * [item0, item1....itemN] [free space] [dataN...data1, data0]
449 * The data is separate from the items to get the keys closer together
453 struct btrfs_header header;
454 struct btrfs_item items[];
455 } __attribute__ ((__packed__));
458 * all non-leaf blocks are nodes, they hold only keys and pointers to
461 struct btrfs_key_ptr {
462 struct btrfs_disk_key key;
465 } __attribute__ ((__packed__));
468 struct btrfs_header header;
469 struct btrfs_key_ptr ptrs[];
470 } __attribute__ ((__packed__));
473 * btrfs_paths remember the path taken from the root down to the leaf.
474 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
475 * to any other levels that are present.
477 * The slots array records the index of the item or block pointer
478 * used while walking the tree.
482 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
483 int slots[BTRFS_MAX_LEVEL];
484 /* if there is real range locking, this locks field will change */
485 int locks[BTRFS_MAX_LEVEL];
487 /* keep some upper locks as we walk down */
491 * set by btrfs_split_item, tells search_slot to keep all locks
492 * and to force calls to keep space in the nodes
494 unsigned int search_for_split:1;
495 unsigned int keep_locks:1;
496 unsigned int skip_locking:1;
497 unsigned int leave_spinning:1;
501 * items in the extent btree are used to record the objectid of the
502 * owner of the block and the number of references
505 struct btrfs_extent_item {
509 } __attribute__ ((__packed__));
511 struct btrfs_extent_item_v0 {
513 } __attribute__ ((__packed__));
515 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
516 sizeof(struct btrfs_item))
518 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
519 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
521 /* following flags only apply to tree blocks */
523 /* use full backrefs for extent pointers in the block*/
524 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
526 struct btrfs_tree_block_info {
527 struct btrfs_disk_key key;
529 } __attribute__ ((__packed__));
531 struct btrfs_extent_data_ref {
536 } __attribute__ ((__packed__));
538 struct btrfs_shared_data_ref {
540 } __attribute__ ((__packed__));
542 struct btrfs_extent_inline_ref {
545 } __attribute__ ((__packed__));
547 struct btrfs_extent_ref_v0 {
552 } __attribute__ ((__packed__));
554 /* dev extents record free space on individual devices. The owner
555 * field points back to the chunk allocation mapping tree that allocated
556 * the extent. The chunk tree uuid field is a way to double check the owner
558 struct btrfs_dev_extent {
560 __le64 chunk_objectid;
563 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
564 } __attribute__ ((__packed__));
566 struct btrfs_inode_ref {
570 } __attribute__ ((__packed__));
572 struct btrfs_timespec {
575 } __attribute__ ((__packed__));
578 BTRFS_COMPRESS_NONE = 0,
579 BTRFS_COMPRESS_ZLIB = 1,
580 BTRFS_COMPRESS_LZO = 2,
581 BTRFS_COMPRESS_TYPES = 2,
582 BTRFS_COMPRESS_LAST = 3,
583 } btrfs_compression_type;
585 /* we don't understand any encryption methods right now */
587 BTRFS_ENCRYPTION_NONE = 0,
588 BTRFS_ENCRYPTION_LAST = 1,
589 } btrfs_encryption_type;
591 struct btrfs_inode_item {
592 /* nfs style generation number */
594 /* transid that last touched this inode */
606 /* modification sequence number for NFS */
610 * a little future expansion, for more than this we can
611 * just grow the inode item and version it
614 struct btrfs_timespec atime;
615 struct btrfs_timespec ctime;
616 struct btrfs_timespec mtime;
617 struct btrfs_timespec otime;
618 } __attribute__ ((__packed__));
620 struct btrfs_dir_log_item {
622 } __attribute__ ((__packed__));
624 struct btrfs_dir_item {
625 struct btrfs_disk_key location;
630 } __attribute__ ((__packed__));
632 struct btrfs_root_item {
633 struct btrfs_inode_item inode;
639 __le64 last_snapshot;
642 struct btrfs_disk_key drop_progress;
645 } __attribute__ ((__packed__));
648 * this is used for both forward and backward root refs
650 struct btrfs_root_ref {
654 } __attribute__ ((__packed__));
656 #define BTRFS_FILE_EXTENT_INLINE 0
657 #define BTRFS_FILE_EXTENT_REG 1
658 #define BTRFS_FILE_EXTENT_PREALLOC 2
660 struct btrfs_file_extent_item {
662 * transaction id that created this extent
666 * max number of bytes to hold this extent in ram
667 * when we split a compressed extent we can't know how big
668 * each of the resulting pieces will be. So, this is
669 * an upper limit on the size of the extent in ram instead of
675 * 32 bits for the various ways we might encode the data,
676 * including compression and encryption. If any of these
677 * are set to something a given disk format doesn't understand
678 * it is treated like an incompat flag for reading and writing,
683 __le16 other_encoding; /* spare for later use */
685 /* are we inline data or a real extent? */
689 * disk space consumed by the extent, checksum blocks are included
693 __le64 disk_num_bytes;
695 * the logical offset in file blocks (no csums)
696 * this extent record is for. This allows a file extent to point
697 * into the middle of an existing extent on disk, sharing it
698 * between two snapshots (useful if some bytes in the middle of the
699 * extent have changed
703 * the logical number of file blocks (no csums included)
707 } __attribute__ ((__packed__));
709 struct btrfs_csum_item {
711 } __attribute__ ((__packed__));
713 /* tag for the radix tree of block groups in ram */
714 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
715 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
716 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
717 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
718 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
719 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
720 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
721 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
723 /* used in struct btrfs_balance_args fields */
724 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
726 struct btrfs_block_group_item {
728 __le64 chunk_objectid;
730 } __attribute__ ((__packed__));
732 struct btrfs_space_info {
738 struct list_head list;
741 struct btrfs_block_group_cache {
742 struct cache_extent cache;
743 struct btrfs_key key;
744 struct btrfs_block_group_item item;
745 struct btrfs_space_info *space_info;
752 struct btrfs_extent_ops {
753 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
754 u64 hint_byte, struct btrfs_key *ins);
755 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
760 struct btrfs_fs_devices;
761 struct btrfs_fs_info {
762 u8 fsid[BTRFS_FSID_SIZE];
763 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
764 struct btrfs_root *fs_root;
765 struct btrfs_root *extent_root;
766 struct btrfs_root *tree_root;
767 struct btrfs_root *chunk_root;
768 struct btrfs_root *dev_root;
769 struct btrfs_root *csum_root;
771 struct cache_tree fs_root_cache;
773 /* the log root tree is a directory of all the other log roots */
774 struct btrfs_root *log_root_tree;
776 struct extent_io_tree extent_cache;
777 struct extent_io_tree free_space_cache;
778 struct extent_io_tree block_group_cache;
779 struct extent_io_tree pinned_extents;
780 struct extent_io_tree pending_del;
781 struct extent_io_tree extent_ins;
783 /* logical->physical extent mapping */
784 struct btrfs_mapping_tree mapping_tree;
787 u64 last_trans_committed;
789 u64 avail_data_alloc_bits;
790 u64 avail_metadata_alloc_bits;
791 u64 avail_system_alloc_bits;
792 u64 data_alloc_profile;
793 u64 metadata_alloc_profile;
794 u64 system_alloc_profile;
797 struct btrfs_trans_handle *running_transaction;
798 struct btrfs_super_block super_copy;
799 struct mutex fs_mutex;
804 struct btrfs_extent_ops *extent_ops;
805 struct list_head dirty_cowonly_roots;
807 struct btrfs_fs_devices *fs_devices;
808 struct list_head space_info;
811 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
812 struct btrfs_root *root,
813 u64 bytenr, u64 num_bytes, u64 parent,
814 u64 root_objectid, u64 owner, u64 offset,
816 struct cache_tree *fsck_extent_cache;
817 struct cache_tree *corrupt_blocks;
821 * in ram representation of the tree. extent_root is used for all allocations
822 * and for the extent tree extent_root root.
825 struct extent_buffer *node;
826 struct extent_buffer *commit_root;
827 struct btrfs_root_item root_item;
828 struct btrfs_key root_key;
829 struct btrfs_fs_info *fs_info;
833 /* data allocations are done in sectorsize units */
836 /* node allocations are done in nodesize units */
839 /* leaf allocations are done in leafsize units */
842 /* leaf allocations are done in leafsize units */
851 u64 last_inode_alloc;
853 /* the dirty list is only used by non-reference counted roots */
854 struct list_head dirty_list;
855 struct cache_extent cache;
859 * inode items have the data typically returned from stat and store other
860 * info about object characteristics. There is one for every file and dir in
863 #define BTRFS_INODE_ITEM_KEY 1
864 #define BTRFS_INODE_REF_KEY 12
865 #define BTRFS_XATTR_ITEM_KEY 24
866 #define BTRFS_ORPHAN_ITEM_KEY 48
868 #define BTRFS_DIR_LOG_ITEM_KEY 60
869 #define BTRFS_DIR_LOG_INDEX_KEY 72
871 * dir items are the name -> inode pointers in a directory. There is one
872 * for every name in a directory.
874 #define BTRFS_DIR_ITEM_KEY 84
875 #define BTRFS_DIR_INDEX_KEY 96
878 * extent data is for file data
880 #define BTRFS_EXTENT_DATA_KEY 108
883 * csum items have the checksums for data in the extents
885 #define BTRFS_CSUM_ITEM_KEY 120
887 * extent csums are stored in a separate tree and hold csums for
888 * an entire extent on disk.
890 #define BTRFS_EXTENT_CSUM_KEY 128
893 * root items point to tree roots. There are typically in the root
894 * tree used by the super block to find all the other trees
896 #define BTRFS_ROOT_ITEM_KEY 132
899 * root backrefs tie subvols and snapshots to the directory entries that
902 #define BTRFS_ROOT_BACKREF_KEY 144
905 * root refs make a fast index for listing all of the snapshots and
906 * subvolumes referenced by a given root. They point directly to the
907 * directory item in the root that references the subvol
909 #define BTRFS_ROOT_REF_KEY 156
912 * extent items are in the extent map tree. These record which blocks
913 * are used, and how many references there are to each block
915 #define BTRFS_EXTENT_ITEM_KEY 168
917 #define BTRFS_TREE_BLOCK_REF_KEY 176
919 #define BTRFS_EXTENT_DATA_REF_KEY 178
921 /* old style extent backrefs */
922 #define BTRFS_EXTENT_REF_V0_KEY 180
924 #define BTRFS_SHARED_BLOCK_REF_KEY 182
926 #define BTRFS_SHARED_DATA_REF_KEY 184
930 * block groups give us hints into the extent allocation trees. Which
931 * blocks are free etc etc
933 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
935 #define BTRFS_DEV_EXTENT_KEY 204
936 #define BTRFS_DEV_ITEM_KEY 216
937 #define BTRFS_CHUNK_ITEM_KEY 228
939 #define BTRFS_BALANCE_ITEM_KEY 248
942 * string items are for debugging. They just store a short string of
945 #define BTRFS_STRING_ITEM_KEY 253
949 #define BTRFS_INODE_NODATASUM (1 << 0)
950 #define BTRFS_INODE_NODATACOW (1 << 1)
951 #define BTRFS_INODE_READONLY (1 << 2)
953 #define read_eb_member(eb, ptr, type, member, result) ( \
954 read_extent_buffer(eb, (char *)(result), \
955 ((unsigned long)(ptr)) + \
956 offsetof(type, member), \
957 sizeof(((type *)0)->member)))
959 #define write_eb_member(eb, ptr, type, member, result) ( \
960 write_extent_buffer(eb, (char *)(result), \
961 ((unsigned long)(ptr)) + \
962 offsetof(type, member), \
963 sizeof(((type *)0)->member)))
965 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
966 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
968 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
969 return le##bits##_to_cpu(h->member); \
971 static inline void btrfs_set_##name(struct extent_buffer *eb, \
974 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
975 h->member = cpu_to_le##bits(val); \
978 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
979 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
982 unsigned long offset = (unsigned long)s; \
983 type *p = (type *) (eb->data + offset); \
984 return le##bits##_to_cpu(p->member); \
986 static inline void btrfs_set_##name(struct extent_buffer *eb, \
987 type *s, u##bits val) \
989 unsigned long offset = (unsigned long)s; \
990 type *p = (type *) (eb->data + offset); \
991 p->member = cpu_to_le##bits(val); \
994 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
995 static inline u##bits btrfs_##name(type *s) \
997 return le##bits##_to_cpu(s->member); \
999 static inline void btrfs_set_##name(type *s, u##bits val) \
1001 s->member = cpu_to_le##bits(val); \
1004 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1005 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1006 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1007 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1008 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1009 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1011 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1012 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1013 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1014 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1015 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1016 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1018 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1019 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1021 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1023 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1025 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1027 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1029 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1030 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1032 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1034 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1036 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1039 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1041 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1044 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1046 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1049 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1050 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1051 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1052 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1053 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1054 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1055 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1056 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1057 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1058 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1059 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1061 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1063 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1066 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1067 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1068 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1070 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1072 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1074 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1076 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1077 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1079 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1081 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1082 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1084 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1087 unsigned long offset = (unsigned long)c;
1088 offset += offsetof(struct btrfs_chunk, stripe);
1089 offset += nr * sizeof(struct btrfs_stripe);
1090 return (struct btrfs_stripe *)offset;
1093 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1095 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1098 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1099 struct btrfs_chunk *c, int nr)
1101 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1104 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1105 struct btrfs_chunk *c, int nr,
1108 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1111 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1112 struct btrfs_chunk *c, int nr)
1114 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1117 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1118 struct btrfs_chunk *c, int nr,
1121 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1124 /* struct btrfs_block_group_item */
1125 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1127 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1129 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1130 struct btrfs_block_group_item, chunk_objectid, 64);
1132 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1133 struct btrfs_block_group_item, chunk_objectid, 64);
1134 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1135 struct btrfs_block_group_item, flags, 64);
1136 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1137 struct btrfs_block_group_item, flags, 64);
1139 /* struct btrfs_inode_ref */
1140 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1141 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1142 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1144 /* struct btrfs_inode_item */
1145 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1146 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1147 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1148 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1149 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1150 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1151 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1152 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1153 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1154 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1155 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1156 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1158 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1159 struct btrfs_inode_item, generation, 64);
1160 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1161 struct btrfs_inode_item, generation, 64);
1162 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1163 struct btrfs_inode_item, size, 64);
1164 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1165 struct btrfs_inode_item, nbytes, 64);
1166 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1167 struct btrfs_inode_item, block_group, 64);
1168 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1169 struct btrfs_inode_item, nlink, 32);
1170 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1171 struct btrfs_inode_item, uid, 32);
1172 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1173 struct btrfs_inode_item, gid, 32);
1174 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1175 struct btrfs_inode_item, mode, 32);
1176 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1177 struct btrfs_inode_item, rdev, 64);
1178 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1179 struct btrfs_inode_item, flags, 64);
1181 static inline struct btrfs_timespec *
1182 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1184 unsigned long ptr = (unsigned long)inode_item;
1185 ptr += offsetof(struct btrfs_inode_item, atime);
1186 return (struct btrfs_timespec *)ptr;
1189 static inline struct btrfs_timespec *
1190 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1192 unsigned long ptr = (unsigned long)inode_item;
1193 ptr += offsetof(struct btrfs_inode_item, mtime);
1194 return (struct btrfs_timespec *)ptr;
1197 static inline struct btrfs_timespec *
1198 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1200 unsigned long ptr = (unsigned long)inode_item;
1201 ptr += offsetof(struct btrfs_inode_item, ctime);
1202 return (struct btrfs_timespec *)ptr;
1205 static inline struct btrfs_timespec *
1206 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1208 unsigned long ptr = (unsigned long)inode_item;
1209 ptr += offsetof(struct btrfs_inode_item, otime);
1210 return (struct btrfs_timespec *)ptr;
1213 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1214 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1215 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1217 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1220 /* struct btrfs_dev_extent */
1221 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1223 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1224 chunk_objectid, 64);
1225 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1227 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1229 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1231 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1232 return (u8 *)((unsigned long)dev + ptr);
1236 /* struct btrfs_extent_item */
1237 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1238 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1240 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1242 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1244 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1246 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1247 struct btrfs_tree_block_info *item,
1248 struct btrfs_disk_key *key)
1250 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1253 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1254 struct btrfs_tree_block_info *item,
1255 struct btrfs_disk_key *key)
1257 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1260 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1262 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1264 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1266 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1269 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1272 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1274 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1277 static inline u32 btrfs_extent_inline_ref_size(int type)
1279 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1280 type == BTRFS_SHARED_BLOCK_REF_KEY)
1281 return sizeof(struct btrfs_extent_inline_ref);
1282 if (type == BTRFS_SHARED_DATA_REF_KEY)
1283 return sizeof(struct btrfs_shared_data_ref) +
1284 sizeof(struct btrfs_extent_inline_ref);
1285 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1286 return sizeof(struct btrfs_extent_data_ref) +
1287 offsetof(struct btrfs_extent_inline_ref, offset);
1292 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1293 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1295 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1296 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1298 /* struct btrfs_node */
1299 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1300 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1302 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1305 ptr = offsetof(struct btrfs_node, ptrs) +
1306 sizeof(struct btrfs_key_ptr) * nr;
1307 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1310 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1314 ptr = offsetof(struct btrfs_node, ptrs) +
1315 sizeof(struct btrfs_key_ptr) * nr;
1316 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1319 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1322 ptr = offsetof(struct btrfs_node, ptrs) +
1323 sizeof(struct btrfs_key_ptr) * nr;
1324 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1327 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1331 ptr = offsetof(struct btrfs_node, ptrs) +
1332 sizeof(struct btrfs_key_ptr) * nr;
1333 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1336 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1338 return offsetof(struct btrfs_node, ptrs) +
1339 sizeof(struct btrfs_key_ptr) * nr;
1342 static inline void btrfs_node_key(struct extent_buffer *eb,
1343 struct btrfs_disk_key *disk_key, int nr)
1346 ptr = btrfs_node_key_ptr_offset(nr);
1347 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1348 struct btrfs_key_ptr, key, disk_key);
1351 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1352 struct btrfs_disk_key *disk_key, int nr)
1355 ptr = btrfs_node_key_ptr_offset(nr);
1356 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1357 struct btrfs_key_ptr, key, disk_key);
1360 /* struct btrfs_item */
1361 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1362 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1364 static inline unsigned long btrfs_item_nr_offset(int nr)
1366 return offsetof(struct btrfs_leaf, items) +
1367 sizeof(struct btrfs_item) * nr;
1370 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1373 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1376 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1377 struct btrfs_item *item)
1379 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1382 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1384 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1387 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1389 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1392 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1394 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1397 static inline void btrfs_item_key(struct extent_buffer *eb,
1398 struct btrfs_disk_key *disk_key, int nr)
1400 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1401 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1404 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1405 struct btrfs_disk_key *disk_key, int nr)
1407 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1408 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1411 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1414 * struct btrfs_root_ref
1416 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1417 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1418 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1420 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1421 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1422 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1424 /* struct btrfs_dir_item */
1425 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1426 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1427 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1428 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1430 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1431 struct btrfs_dir_item *item,
1432 struct btrfs_disk_key *key)
1434 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1437 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1438 struct btrfs_dir_item *item,
1439 struct btrfs_disk_key *key)
1441 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1444 /* struct btrfs_disk_key */
1445 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1447 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1448 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1450 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1451 struct btrfs_disk_key *disk)
1453 cpu->offset = le64_to_cpu(disk->offset);
1454 cpu->type = disk->type;
1455 cpu->objectid = le64_to_cpu(disk->objectid);
1458 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1459 struct btrfs_key *cpu)
1461 disk->offset = cpu_to_le64(cpu->offset);
1462 disk->type = cpu->type;
1463 disk->objectid = cpu_to_le64(cpu->objectid);
1466 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1467 struct btrfs_key *key, int nr)
1469 struct btrfs_disk_key disk_key;
1470 btrfs_node_key(eb, &disk_key, nr);
1471 btrfs_disk_key_to_cpu(key, &disk_key);
1474 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1475 struct btrfs_key *key, int nr)
1477 struct btrfs_disk_key disk_key;
1478 btrfs_item_key(eb, &disk_key, nr);
1479 btrfs_disk_key_to_cpu(key, &disk_key);
1482 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1483 struct btrfs_dir_item *item,
1484 struct btrfs_key *key)
1486 struct btrfs_disk_key disk_key;
1487 btrfs_dir_item_key(eb, item, &disk_key);
1488 btrfs_disk_key_to_cpu(key, &disk_key);
1492 static inline u8 btrfs_key_type(struct btrfs_key *key)
1497 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1502 /* struct btrfs_header */
1503 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1504 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1506 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1507 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1508 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1509 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1511 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1513 return (btrfs_header_flags(eb) & flag) == flag;
1516 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1518 u64 flags = btrfs_header_flags(eb);
1519 btrfs_set_header_flags(eb, flags | flag);
1520 return (flags & flag) == flag;
1523 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1525 u64 flags = btrfs_header_flags(eb);
1526 btrfs_set_header_flags(eb, flags & ~flag);
1527 return (flags & flag) == flag;
1530 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1532 u64 flags = btrfs_header_flags(eb);
1533 return flags >> BTRFS_BACKREF_REV_SHIFT;
1536 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1539 u64 flags = btrfs_header_flags(eb);
1540 flags &= ~BTRFS_BACKREF_REV_MASK;
1541 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1542 btrfs_set_header_flags(eb, flags);
1545 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1547 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1551 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1553 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1557 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1559 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1563 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1565 unsigned long ptr = offsetof(struct btrfs_header, csum);
1569 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1574 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1579 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1584 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1586 return (btrfs_header_level(eb) == 0);
1589 /* struct btrfs_root_item */
1590 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1592 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1593 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1594 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1596 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1598 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1599 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1600 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1601 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1602 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1603 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1604 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1605 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1609 /* struct btrfs_root_backup */
1610 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1612 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1614 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1615 tree_root_level, 8);
1617 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1619 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1620 chunk_root_gen, 64);
1621 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1622 chunk_root_level, 8);
1624 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1626 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1627 extent_root_gen, 64);
1628 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1629 extent_root_level, 8);
1631 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1633 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1635 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1638 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1640 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1642 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1645 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1647 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1649 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1650 csum_root_level, 8);
1651 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1653 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1655 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1658 /* struct btrfs_super_block */
1660 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1661 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1662 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1664 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1665 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1666 struct btrfs_super_block, sys_chunk_array_size, 32);
1667 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1668 struct btrfs_super_block, chunk_root_generation, 64);
1669 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1671 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1673 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1674 chunk_root_level, 8);
1675 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1677 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1678 log_root_transid, 64);
1679 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1681 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1683 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1685 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1687 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1689 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1691 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1693 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1694 root_dir_objectid, 64);
1695 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1697 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1699 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1701 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1702 incompat_flags, 64);
1703 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1705 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1706 cache_generation, 64);
1708 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1710 int t = btrfs_super_csum_type(s);
1711 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1712 return btrfs_csum_sizes[t];
1715 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1717 return offsetof(struct btrfs_leaf, items);
1720 /* struct btrfs_file_extent_item */
1721 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1722 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
1724 static inline unsigned long btrfs_file_extent_inline_start(struct
1725 btrfs_file_extent_item *e)
1727 unsigned long offset = (unsigned long)e;
1728 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1732 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1734 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1737 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1739 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
1741 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1743 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
1745 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1746 disk_num_bytes, 64);
1747 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1749 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
1751 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1753 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
1755 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1757 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
1759 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1761 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
1763 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1765 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1766 other_encoding, 16);
1768 /* this returns the number of file bytes represented by the inline item.
1769 * If an item is compressed, this is the uncompressed size
1771 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1772 struct btrfs_file_extent_item *e)
1774 return btrfs_file_extent_ram_bytes(eb, e);
1778 * this returns the number of bytes used by the item on disk, minus the
1779 * size of any extent headers. If a file is compressed on disk, this is
1780 * the compressed size
1782 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1783 struct btrfs_item *e)
1785 unsigned long offset;
1786 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1787 return btrfs_item_size(eb, e) - offset;
1790 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1792 return root->leafsize;
1793 return root->nodesize;
1796 /* helper function to cast into the data area of the leaf. */
1797 #define btrfs_item_ptr(leaf, slot, type) \
1798 ((type *)(btrfs_leaf_data(leaf) + \
1799 btrfs_item_offset_nr(leaf, slot)))
1801 #define btrfs_item_ptr_offset(leaf, slot) \
1802 ((unsigned long)(btrfs_leaf_data(leaf) + \
1803 btrfs_item_offset_nr(leaf, slot)))
1806 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
1807 struct btrfs_root *root);
1808 int btrfs_check_block_accounting(struct btrfs_root *root);
1809 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
1810 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1811 struct btrfs_root *root);
1812 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1813 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1814 btrfs_fs_info *info,
1816 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1817 struct btrfs_block_group_cache
1818 *hint, u64 search_start,
1819 int data, int owner);
1820 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1821 struct btrfs_root *root,
1822 u32 blocksize, u64 root_objectid,
1823 struct btrfs_disk_key *key, int level,
1824 u64 hint, u64 empty_size);
1825 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1826 struct btrfs_root *root,
1827 u64 num_bytes, u64 parent,
1828 u64 root_objectid, u64 ref_generation,
1829 u64 owner, u64 empty_size, u64 hint_byte,
1830 u64 search_end, struct btrfs_key *ins, int data);
1831 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
1832 struct btrfs_root *root, u64 bytenr,
1833 u64 num_bytes, u64 *refs, u64 *flags);
1834 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
1835 struct btrfs_root *root,
1836 u64 bytenr, u64 num_bytes, u64 flags);
1837 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1838 struct extent_buffer *buf, int record_parent);
1839 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1840 struct extent_buffer *buf, int record_parent);
1841 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1842 struct btrfs_root *root,
1843 u64 bytenr, u64 num_bytes, u64 parent,
1844 u64 root_objectid, u64 owner, u64 offset);
1845 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1846 struct btrfs_root *root,
1847 struct extent_io_tree *unpin);
1848 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1849 struct btrfs_root *root,
1850 u64 bytenr, u64 num_bytes, u64 parent,
1851 u64 root_objectid, u64 ref_generation,
1852 u64 owner_objectid);
1853 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1854 struct btrfs_root *root, u64 bytenr,
1855 u64 orig_parent, u64 parent,
1856 u64 root_objectid, u64 ref_generation,
1857 u64 owner_objectid);
1858 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1859 struct btrfs_root *root);
1860 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1861 int btrfs_read_block_groups(struct btrfs_root *root);
1862 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1863 struct btrfs_root *root, u64 bytes_used,
1864 u64 type, u64 chunk_objectid, u64 chunk_offset,
1866 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
1867 struct btrfs_root *root);
1868 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1869 struct btrfs_root *root, u64 bytenr, u64 num,
1870 int alloc, int mark_free);
1872 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1873 struct btrfs_path *path, int level, int slot);
1874 int btrfs_check_node(struct btrfs_root *root,
1875 struct btrfs_disk_key *parent_key,
1876 struct extent_buffer *buf);
1877 int btrfs_check_leaf(struct btrfs_root *root,
1878 struct btrfs_disk_key *parent_key,
1879 struct extent_buffer *buf);
1880 int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans,
1881 struct btrfs_root *root);
1882 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
1883 int level, int slot, u64 objectid);
1884 struct extent_buffer *read_node_slot(struct btrfs_root *root,
1885 struct extent_buffer *parent, int slot);
1886 int btrfs_previous_item(struct btrfs_root *root,
1887 struct btrfs_path *path, u64 min_objectid,
1889 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1890 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1891 struct btrfs_root *root, struct extent_buffer *buf,
1892 struct extent_buffer *parent, int parent_slot,
1893 struct extent_buffer **cow_ret);
1894 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
1895 struct btrfs_root *root,
1896 struct extent_buffer *buf,
1897 struct extent_buffer *parent, int parent_slot,
1898 struct extent_buffer **cow_ret,
1899 u64 search_start, u64 empty_size);
1900 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1901 struct btrfs_root *root,
1902 struct extent_buffer *buf,
1903 struct extent_buffer **cow_ret, u64 new_root_objectid);
1904 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1905 *root, struct btrfs_path *path, u32 data_size);
1906 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1907 struct btrfs_root *root,
1908 struct btrfs_path *path,
1909 u32 new_size, int from_end);
1910 int btrfs_split_item(struct btrfs_trans_handle *trans,
1911 struct btrfs_root *root,
1912 struct btrfs_path *path,
1913 struct btrfs_key *new_key,
1914 unsigned long split_offset);
1915 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1916 *root, struct btrfs_key *key, struct btrfs_path *p, int
1918 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1919 struct btrfs_root *root, struct extent_buffer *parent,
1920 int start_slot, int cache_only, u64 *last_ret,
1921 struct btrfs_key *progress);
1922 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1923 struct btrfs_path *btrfs_alloc_path(void);
1924 void btrfs_free_path(struct btrfs_path *p);
1925 void btrfs_init_path(struct btrfs_path *p);
1926 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1927 struct btrfs_path *path, int slot, int nr);
1929 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1930 struct btrfs_root *root,
1931 struct btrfs_path *path)
1933 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1936 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1937 *root, struct btrfs_key *key, void *data, u32 data_size);
1938 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1939 struct btrfs_root *root,
1940 struct btrfs_path *path,
1941 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1943 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1944 struct btrfs_root *root,
1945 struct btrfs_path *path,
1946 struct btrfs_key *key,
1949 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1952 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1953 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1954 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1955 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1957 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1958 struct btrfs_root *root, struct btrfs_path *path,
1959 struct btrfs_key *new_key);
1962 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1963 struct btrfs_root *tree_root,
1964 u64 root_id, u8 type, u64 ref_id,
1965 u64 dirid, u64 sequence,
1966 const char *name, int name_len);
1967 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1968 struct btrfs_key *key);
1969 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1970 *root, struct btrfs_key *key, struct btrfs_root_item
1972 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1973 *root, struct btrfs_key *key, struct btrfs_root_item
1975 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1976 btrfs_root_item *item, struct btrfs_key *key);
1977 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1978 struct btrfs_root *latest_root);
1980 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1981 *root, const char *name, int name_len, u64 dir,
1982 struct btrfs_key *location, u8 type, u64 index);
1983 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1984 struct btrfs_root *root,
1985 struct btrfs_path *path, u64 dir,
1986 const char *name, int name_len,
1988 struct btrfs_dir_item *
1989 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1990 struct btrfs_root *root,
1991 struct btrfs_path *path, u64 dir,
1992 u64 objectid, const char *name, int name_len,
1994 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1995 struct btrfs_path *path,
1996 const char *name, int name_len);
1997 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1998 struct btrfs_root *root,
1999 struct btrfs_path *path,
2000 struct btrfs_dir_item *di);
2001 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2002 struct btrfs_root *root, const char *name,
2003 u16 name_len, const void *data, u16 data_len,
2005 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2006 struct btrfs_root *root,
2007 struct btrfs_path *path, u64 dir,
2008 const char *name, u16 name_len,
2011 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2012 struct btrfs_root *fs_root,
2013 u64 dirid, u64 *objectid);
2014 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2017 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2018 struct btrfs_root *root,
2019 const char *name, int name_len,
2020 u64 inode_objectid, u64 ref_objectid, u64 index);
2021 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2022 struct btrfs_root *root,
2023 const char *name, int name_len,
2024 u64 inode_objectid, u64 ref_objectid);
2025 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2026 struct btrfs_root *root,
2027 struct btrfs_path *path, u64 objectid);
2028 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2029 *root, u64 objectid, struct btrfs_inode_item
2031 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2032 *root, struct btrfs_path *path,
2033 struct btrfs_key *location, int mod);
2036 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2037 struct btrfs_root *root, u64 bytenr, u64 len);
2038 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2039 struct btrfs_root *root,
2040 u64 objectid, u64 pos, u64 offset,
2043 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2044 struct btrfs_root *root, u64 objectid,
2045 u64 offset, char *buffer, size_t size);
2046 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2047 struct btrfs_root *root,
2048 struct btrfs_path *path, u64 objectid,
2049 u64 bytenr, int mod);
2050 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2051 struct btrfs_root *root, u64 alloc_end,
2052 u64 bytenr, char *data, size_t len);
2053 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2054 struct btrfs_root *root,
2055 struct btrfs_path *path,
2056 u64 bytenr, int cow);
2057 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2058 struct btrfs_root *root, struct btrfs_path *path,