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.
19 #ifndef __BTRFS_CTREE_H__
20 #define __BTRFS_CTREE_H__
22 #if BTRFS_FLAT_INCLUDES
24 #include "kerncompat.h"
25 #include "radix-tree.h"
26 #include "extent-cache.h"
27 #include "extent_io.h"
30 #include <btrfs/list.h>
31 #include <btrfs/kerncompat.h>
32 #include <btrfs/radix-tree.h>
33 #include <btrfs/extent-cache.h>
34 #include <btrfs/extent_io.h>
35 #include <btrfs/ioctl.h>
36 #endif /* BTRFS_FLAT_INCLUDES */
39 struct btrfs_trans_handle;
40 struct btrfs_free_space_ctl;
41 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
44 * Fake signature for an unfinalized filesystem, structures might be partially
47 #define BTRFS_MAGIC_PARTIAL 0x4D5F536652484221ULL /* ascii !BHRfS_M, no null */
49 #define BTRFS_MAX_MIRRORS 3
51 #define BTRFS_MAX_LEVEL 8
53 #define BTRFS_COMPAT_EXTENT_TREE_V0
55 /* holds pointers to all of the tree roots */
56 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
58 /* stores information about which extents are in use, and reference counts */
59 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
62 * chunk tree stores translations from logical -> physical block numbering
63 * the super block points to the chunk tree
65 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
68 * stores information about which areas of a given device are in use.
69 * one per device. The tree of tree roots points to the device tree
71 #define BTRFS_DEV_TREE_OBJECTID 4ULL
73 /* one per subvolume, storing files and directories */
74 #define BTRFS_FS_TREE_OBJECTID 5ULL
76 /* directory objectid inside the root tree */
77 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
78 /* holds checksums of all the data extents */
79 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
80 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
82 /* for storing items that use the BTRFS_UUID_KEY* */
83 #define BTRFS_UUID_TREE_OBJECTID 9ULL
85 /* tracks free space in block groups. */
86 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
88 /* device stats in the device tree */
89 #define BTRFS_DEV_STATS_OBJECTID 0ULL
91 /* for storing balance parameters in the root tree */
92 #define BTRFS_BALANCE_OBJECTID -4ULL
94 /* oprhan objectid for tracking unlinked/truncated files */
95 #define BTRFS_ORPHAN_OBJECTID -5ULL
97 /* does write ahead logging to speed up fsyncs */
98 #define BTRFS_TREE_LOG_OBJECTID -6ULL
99 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
101 /* space balancing */
102 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
103 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
106 * extent checksums all have this objectid
107 * this allows them to share the logging tree
110 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
112 /* For storing free space cache */
113 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
116 * The inode number assigned to the special inode for sotring
119 #define BTRFS_FREE_INO_OBJECTID -12ULL
121 /* dummy objectid represents multiple objectids */
122 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
125 * All files have objectids in this range.
127 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
128 #define BTRFS_LAST_FREE_OBJECTID -256ULL
129 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
134 * the device items go into the chunk tree. The key is in the form
135 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
137 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
140 * the max metadata block size. This limit is somewhat artificial,
141 * but the memmove costs go through the roof for larger blocks.
143 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
146 * we can actually store much bigger names, but lets not confuse the rest
149 #define BTRFS_NAME_LEN 255
152 * Theoretical limit is larger, but we keep this down to a sane
153 * value. That should limit greatly the possibility of collisions on
156 #define BTRFS_LINK_MAX 65535U
158 /* 32 bytes in various csum fields */
159 #define BTRFS_CSUM_SIZE 32
162 #define BTRFS_CSUM_TYPE_CRC32 0
164 static int btrfs_csum_sizes[] = { 4 };
166 /* four bytes for CRC32 */
167 #define BTRFS_CRC32_SIZE 4
168 #define BTRFS_EMPTY_DIR_SIZE 0
170 #define BTRFS_FT_UNKNOWN 0
171 #define BTRFS_FT_REG_FILE 1
172 #define BTRFS_FT_DIR 2
173 #define BTRFS_FT_CHRDEV 3
174 #define BTRFS_FT_BLKDEV 4
175 #define BTRFS_FT_FIFO 5
176 #define BTRFS_FT_SOCK 6
177 #define BTRFS_FT_SYMLINK 7
178 #define BTRFS_FT_XATTR 8
179 #define BTRFS_FT_MAX 9
181 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
184 * the key defines the order in the tree, and so it also defines (optimal)
185 * block layout. objectid corresponds to the inode number. The flags
186 * tells us things about the object, and is a kind of stream selector.
187 * so for a given inode, keys with flags of 1 might refer to the inode
188 * data, flags of 2 may point to file data in the btree and flags == 3
189 * may point to extents.
191 * offset is the starting byte offset for this key in the stream.
193 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
194 * in cpu native order. Otherwise they are identical and their sizes
195 * should be the same (ie both packed)
197 struct btrfs_disk_key {
201 } __attribute__ ((__packed__));
207 } __attribute__ ((__packed__));
209 struct btrfs_mapping_tree {
210 struct cache_tree cache_tree;
213 #define BTRFS_UUID_SIZE 16
214 struct btrfs_dev_item {
215 /* the internal btrfs device id */
218 /* size of the device */
224 /* optimal io alignment for this device */
227 /* optimal io width for this device */
230 /* minimal io size for this device */
233 /* type and info about this device */
236 /* expected generation for this device */
240 * starting byte of this partition on the device,
241 * to allow for stripe alignment in the future
245 /* grouping information for allocation decisions */
248 /* seek speed 0-100 where 100 is fastest */
251 /* bandwidth 0-100 where 100 is fastest */
254 /* btrfs generated uuid for this device */
255 u8 uuid[BTRFS_UUID_SIZE];
257 /* uuid of FS who owns this device */
258 u8 fsid[BTRFS_UUID_SIZE];
259 } __attribute__ ((__packed__));
261 struct btrfs_stripe {
264 u8 dev_uuid[BTRFS_UUID_SIZE];
265 } __attribute__ ((__packed__));
268 /* size of this chunk in bytes */
271 /* objectid of the root referencing this chunk */
277 /* optimal io alignment for this chunk */
280 /* optimal io width for this chunk */
283 /* minimal io size for this chunk */
286 /* 2^16 stripes is quite a lot, a second limit is the size of a single
291 /* sub stripes only matter for raid10 */
293 struct btrfs_stripe stripe;
294 /* additional stripes go here */
295 } __attribute__ ((__packed__));
297 #define BTRFS_FREE_SPACE_EXTENT 1
298 #define BTRFS_FREE_SPACE_BITMAP 2
300 struct btrfs_free_space_entry {
304 } __attribute__ ((__packed__));
306 struct btrfs_free_space_header {
307 struct btrfs_disk_key location;
311 } __attribute__ ((__packed__));
313 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
315 BUG_ON(num_stripes == 0);
316 return sizeof(struct btrfs_chunk) +
317 sizeof(struct btrfs_stripe) * (num_stripes - 1);
320 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
321 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
322 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
323 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
324 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
325 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
327 #define BTRFS_BACKREF_REV_MAX 256
328 #define BTRFS_BACKREF_REV_SHIFT 56
329 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
330 BTRFS_BACKREF_REV_SHIFT)
332 #define BTRFS_OLD_BACKREF_REV 0
333 #define BTRFS_MIXED_BACKREF_REV 1
336 * every tree block (leaf or node) starts with this header.
338 struct btrfs_header {
339 /* these first four must match the super block */
340 u8 csum[BTRFS_CSUM_SIZE];
341 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
342 __le64 bytenr; /* which block this node is supposed to live in */
345 /* allowed to be different from the super from here on down */
346 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
351 } __attribute__ ((__packed__));
353 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
354 sizeof(struct btrfs_header)) / \
355 sizeof(struct btrfs_key_ptr))
356 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
357 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
358 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
359 sizeof(struct btrfs_item) - \
360 sizeof(struct btrfs_file_extent_item))
361 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
362 sizeof(struct btrfs_item) -\
363 sizeof(struct btrfs_dir_item))
367 * this is a very generous portion of the super block, giving us
368 * room to translate 14 chunks with 3 stripes each.
370 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
371 #define BTRFS_LABEL_SIZE 256
374 * just in case we somehow lose the roots and are not able to mount,
375 * we store an array of the roots from previous transactions
378 #define BTRFS_NUM_BACKUP_ROOTS 4
379 struct btrfs_root_backup {
381 __le64 tree_root_gen;
384 __le64 chunk_root_gen;
387 __le64 extent_root_gen;
396 __le64 csum_root_gen;
406 u8 extent_root_level;
410 /* future and to align */
412 } __attribute__ ((__packed__));
415 * the super block basically lists the main trees of the FS
416 * it currently lacks any block count etc etc
418 struct btrfs_super_block {
419 u8 csum[BTRFS_CSUM_SIZE];
420 /* the first 3 fields must match struct btrfs_header */
421 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
422 __le64 bytenr; /* this block number */
425 /* allowed to be different from the btrfs_header from here own down */
432 /* this will help find the new super based on the log root */
433 __le64 log_root_transid;
436 __le64 root_dir_objectid;
440 /* Unused and must be equal to nodesize */
443 __le32 sys_chunk_array_size;
444 __le64 chunk_root_generation;
446 __le64 compat_ro_flags;
447 __le64 incompat_flags;
452 struct btrfs_dev_item dev_item;
454 char label[BTRFS_LABEL_SIZE];
456 __le64 cache_generation;
457 __le64 uuid_tree_generation;
459 /* future expansion */
461 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
462 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
463 } __attribute__ ((__packed__));
466 * Compat flags that we support. If any incompat flags are set other than the
467 * ones specified below then we will fail to mount
469 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
471 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
472 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
473 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
474 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
477 * some patches floated around with a second compression method
478 * lets save that incompat here for when they do get in
479 * Note we don't actually support it, we're just reserving the
482 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
485 * older kernels tried to do bigger metadata blocks, but the
486 * code was pretty buggy. Lets not let them try anymore.
488 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
489 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
490 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
491 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
492 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
494 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
496 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
498 #define BTRFS_FEATURE_INCOMPAT_SUPP \
499 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
500 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
501 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
502 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
503 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
504 BTRFS_FEATURE_INCOMPAT_RAID56 | \
505 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
506 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
507 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
510 * A leaf is full of items. offset and size tell us where to find
511 * the item in the leaf (relative to the start of the data area)
514 struct btrfs_disk_key key;
517 } __attribute__ ((__packed__));
520 * leaves have an item area and a data area:
521 * [item0, item1....itemN] [free space] [dataN...data1, data0]
523 * The data is separate from the items to get the keys closer together
527 struct btrfs_header header;
528 struct btrfs_item items[];
529 } __attribute__ ((__packed__));
532 * all non-leaf blocks are nodes, they hold only keys and pointers to
535 struct btrfs_key_ptr {
536 struct btrfs_disk_key key;
539 } __attribute__ ((__packed__));
542 struct btrfs_header header;
543 struct btrfs_key_ptr ptrs[];
544 } __attribute__ ((__packed__));
547 * btrfs_paths remember the path taken from the root down to the leaf.
548 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
549 * to any other levels that are present.
551 * The slots array records the index of the item or block pointer
552 * used while walking the tree.
556 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
557 int slots[BTRFS_MAX_LEVEL];
558 /* if there is real range locking, this locks field will change */
559 int locks[BTRFS_MAX_LEVEL];
561 /* keep some upper locks as we walk down */
565 * set by btrfs_split_item, tells search_slot to keep all locks
566 * and to force calls to keep space in the nodes
568 unsigned int search_for_split:1;
569 unsigned int skip_check_block:1;
573 * items in the extent btree are used to record the objectid of the
574 * owner of the block and the number of references
577 struct btrfs_extent_item {
581 } __attribute__ ((__packed__));
583 struct btrfs_extent_item_v0 {
585 } __attribute__ ((__packed__));
587 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
588 sizeof(struct btrfs_item))
589 #define BTRFS_MAX_EXTENT_SIZE (128 * 1024 * 1024)
591 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
592 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
594 /* following flags only apply to tree blocks */
596 /* use full backrefs for extent pointers in the block*/
597 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
599 struct btrfs_tree_block_info {
600 struct btrfs_disk_key key;
602 } __attribute__ ((__packed__));
604 struct btrfs_extent_data_ref {
609 } __attribute__ ((__packed__));
611 struct btrfs_shared_data_ref {
613 } __attribute__ ((__packed__));
615 struct btrfs_extent_inline_ref {
618 } __attribute__ ((__packed__));
620 struct btrfs_extent_ref_v0 {
625 } __attribute__ ((__packed__));
627 /* dev extents record free space on individual devices. The owner
628 * field points back to the chunk allocation mapping tree that allocated
629 * the extent. The chunk tree uuid field is a way to double check the owner
631 struct btrfs_dev_extent {
633 __le64 chunk_objectid;
636 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
637 } __attribute__ ((__packed__));
639 struct btrfs_inode_ref {
643 } __attribute__ ((__packed__));
645 struct btrfs_inode_extref {
646 __le64 parent_objectid;
649 __u8 name[0]; /* name goes here */
650 } __attribute__ ((__packed__));
652 struct btrfs_timespec {
655 } __attribute__ ((__packed__));
658 BTRFS_COMPRESS_NONE = 0,
659 BTRFS_COMPRESS_ZLIB = 1,
660 BTRFS_COMPRESS_LZO = 2,
661 BTRFS_COMPRESS_TYPES = 2,
662 BTRFS_COMPRESS_LAST = 3,
663 } btrfs_compression_type;
665 /* we don't understand any encryption methods right now */
667 BTRFS_ENCRYPTION_NONE = 0,
668 BTRFS_ENCRYPTION_LAST = 1,
669 } btrfs_encryption_type;
671 enum btrfs_tree_block_status {
672 BTRFS_TREE_BLOCK_CLEAN,
673 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
674 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
675 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
676 BTRFS_TREE_BLOCK_INVALID_LEVEL,
677 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
678 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
681 struct btrfs_inode_item {
682 /* nfs style generation number */
684 /* transid that last touched this inode */
696 /* modification sequence number for NFS */
700 * a little future expansion, for more than this we can
701 * just grow the inode item and version it
704 struct btrfs_timespec atime;
705 struct btrfs_timespec ctime;
706 struct btrfs_timespec mtime;
707 struct btrfs_timespec otime;
708 } __attribute__ ((__packed__));
710 struct btrfs_dir_log_item {
712 } __attribute__ ((__packed__));
714 struct btrfs_dir_item {
715 struct btrfs_disk_key location;
720 } __attribute__ ((__packed__));
722 struct btrfs_root_item_v0 {
723 struct btrfs_inode_item inode;
729 __le64 last_snapshot;
732 struct btrfs_disk_key drop_progress;
735 } __attribute__ ((__packed__));
737 struct btrfs_root_item {
738 struct btrfs_inode_item inode;
744 __le64 last_snapshot;
747 struct btrfs_disk_key drop_progress;
752 * The following fields appear after subvol_uuids+subvol_times
757 * This generation number is used to test if the new fields are valid
758 * and up to date while reading the root item. Every time the root item
759 * is written out, the "generation" field is copied into this field. If
760 * anyone ever mounted the fs with an older kernel, we will have
761 * mismatching generation values here and thus must invalidate the
762 * new fields. See btrfs_update_root and btrfs_find_last_root for
764 * the offset of generation_v2 is also used as the start for the memset
765 * when invalidating the fields.
767 __le64 generation_v2;
768 u8 uuid[BTRFS_UUID_SIZE];
769 u8 parent_uuid[BTRFS_UUID_SIZE];
770 u8 received_uuid[BTRFS_UUID_SIZE];
771 __le64 ctransid; /* updated when an inode changes */
772 __le64 otransid; /* trans when created */
773 __le64 stransid; /* trans when sent. non-zero for received subvol */
774 __le64 rtransid; /* trans when received. non-zero for received subvol */
775 struct btrfs_timespec ctime;
776 struct btrfs_timespec otime;
777 struct btrfs_timespec stime;
778 struct btrfs_timespec rtime;
779 __le64 reserved[8]; /* for future */
780 } __attribute__ ((__packed__));
783 * this is used for both forward and backward root refs
785 struct btrfs_root_ref {
789 } __attribute__ ((__packed__));
791 struct btrfs_disk_balance_args {
793 * profiles to operate on, single is denoted by
794 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
800 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
801 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
814 /* devid subset filter [pstart..pend) */
818 /* btrfs virtual address space subset filter [vstart..vend) */
823 * profile to convert to, single is denoted by
824 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
828 /* BTRFS_BALANCE_ARGS_* */
832 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
833 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
845 * Process chunks that cross stripes_min..stripes_max devices,
846 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
852 } __attribute__ ((__packed__));
855 * store balance parameters to disk so that balance can be properly
856 * resumed after crash or unmount
858 struct btrfs_balance_item {
859 /* BTRFS_BALANCE_* */
862 struct btrfs_disk_balance_args data;
863 struct btrfs_disk_balance_args meta;
864 struct btrfs_disk_balance_args sys;
867 } __attribute__ ((__packed__));
869 #define BTRFS_FILE_EXTENT_INLINE 0
870 #define BTRFS_FILE_EXTENT_REG 1
871 #define BTRFS_FILE_EXTENT_PREALLOC 2
873 struct btrfs_file_extent_item {
875 * transaction id that created this extent
879 * max number of bytes to hold this extent in ram
880 * when we split a compressed extent we can't know how big
881 * each of the resulting pieces will be. So, this is
882 * an upper limit on the size of the extent in ram instead of
888 * 32 bits for the various ways we might encode the data,
889 * including compression and encryption. If any of these
890 * are set to something a given disk format doesn't understand
891 * it is treated like an incompat flag for reading and writing,
896 __le16 other_encoding; /* spare for later use */
898 /* are we inline data or a real extent? */
902 * disk space consumed by the extent, checksum blocks are included
906 __le64 disk_num_bytes;
908 * the logical offset in file blocks (no csums)
909 * this extent record is for. This allows a file extent to point
910 * into the middle of an existing extent on disk, sharing it
911 * between two snapshots (useful if some bytes in the middle of the
912 * extent have changed
916 * the logical number of file blocks (no csums included)
920 } __attribute__ ((__packed__));
922 struct btrfs_csum_item {
924 } __attribute__ ((__packed__));
927 * We don't want to overwrite 1M at the beginning of device, even though
928 * there is our 1st superblock at 64k. Some possible reasons:
929 * - the first 64k blank is useful for some boot loader/manager
930 * - the first 1M could be scratched by buggy partitioner or somesuch
932 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
934 /* tag for the radix tree of block groups in ram */
935 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
936 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
937 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
938 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
939 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
940 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
941 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
942 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
943 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
944 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
945 #define BTRFS_NR_RAID_TYPES 7
947 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
948 BTRFS_BLOCK_GROUP_SYSTEM | \
949 BTRFS_BLOCK_GROUP_METADATA)
951 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
952 BTRFS_BLOCK_GROUP_RAID1 | \
953 BTRFS_BLOCK_GROUP_RAID5 | \
954 BTRFS_BLOCK_GROUP_RAID6 | \
955 BTRFS_BLOCK_GROUP_DUP | \
956 BTRFS_BLOCK_GROUP_RAID10)
958 /* used in struct btrfs_balance_args fields */
959 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
962 * GLOBAL_RSV does not exist as a on-disk block group type and is used
963 * internally for exporting info about global block reserve from space infos
965 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
967 #define BTRFS_QGROUP_LEVEL_SHIFT 48
969 static inline u64 btrfs_qgroup_level(u64 qgroupid)
971 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
974 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
976 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
979 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
980 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
981 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
983 struct btrfs_qgroup_status_item {
987 __le64 rescan; /* progress during scanning */
988 } __attribute__ ((__packed__));
990 struct btrfs_block_group_item {
992 __le64 chunk_objectid;
994 } __attribute__ ((__packed__));
996 struct btrfs_free_space_info {
999 } __attribute__ ((__packed__));
1001 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1003 struct btrfs_qgroup_info_item {
1006 __le64 referenced_compressed;
1008 __le64 exclusive_compressed;
1009 } __attribute__ ((__packed__));
1011 /* flags definition for qgroup limits */
1012 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1013 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1014 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1015 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1016 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1017 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1019 struct btrfs_qgroup_limit_item {
1021 __le64 max_referenced;
1022 __le64 max_exclusive;
1023 __le64 rsv_referenced;
1024 __le64 rsv_exclusive;
1025 } __attribute__ ((__packed__));
1027 struct btrfs_space_info {
1033 struct list_head list;
1036 struct btrfs_block_group_cache {
1037 struct cache_extent cache;
1038 struct btrfs_key key;
1039 struct btrfs_block_group_item item;
1040 struct btrfs_space_info *space_info;
1041 struct btrfs_free_space_ctl *free_space_ctl;
1049 struct btrfs_device;
1050 struct btrfs_fs_devices;
1051 struct btrfs_fs_info {
1052 u8 fsid[BTRFS_FSID_SIZE];
1054 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1055 u8 *new_chunk_tree_uuid;
1056 struct btrfs_root *fs_root;
1057 struct btrfs_root *extent_root;
1058 struct btrfs_root *tree_root;
1059 struct btrfs_root *chunk_root;
1060 struct btrfs_root *dev_root;
1061 struct btrfs_root *csum_root;
1062 struct btrfs_root *quota_root;
1063 struct btrfs_root *free_space_root;
1065 struct rb_root fs_root_tree;
1067 /* the log root tree is a directory of all the other log roots */
1068 struct btrfs_root *log_root_tree;
1070 struct extent_io_tree extent_cache;
1071 struct extent_io_tree free_space_cache;
1072 struct extent_io_tree block_group_cache;
1073 struct extent_io_tree pinned_extents;
1074 struct extent_io_tree pending_del;
1075 struct extent_io_tree extent_ins;
1076 struct extent_io_tree *excluded_extents;
1078 /* logical->physical extent mapping */
1079 struct btrfs_mapping_tree mapping_tree;
1082 u64 last_trans_committed;
1084 u64 avail_data_alloc_bits;
1085 u64 avail_metadata_alloc_bits;
1086 u64 avail_system_alloc_bits;
1087 u64 data_alloc_profile;
1088 u64 metadata_alloc_profile;
1089 u64 system_alloc_profile;
1092 struct btrfs_trans_handle *running_transaction;
1093 struct btrfs_super_block *super_copy;
1094 struct mutex fs_mutex;
1099 struct list_head dirty_cowonly_roots;
1100 struct list_head recow_ebs;
1102 struct btrfs_fs_devices *fs_devices;
1103 struct list_head space_info;
1106 unsigned int readonly:1;
1107 unsigned int on_restoring:1;
1108 unsigned int is_chunk_recover:1;
1109 unsigned int quota_enabled:1;
1110 unsigned int suppress_check_block_errors:1;
1111 unsigned int ignore_fsid_mismatch:1;
1112 unsigned int ignore_chunk_tree_error:1;
1113 unsigned int avoid_meta_chunk_alloc:1;
1114 unsigned int avoid_sys_chunk_alloc:1;
1115 unsigned int finalize_on_close:1;
1117 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1118 struct btrfs_root *root,
1119 u64 bytenr, u64 num_bytes, u64 parent,
1120 u64 root_objectid, u64 owner, u64 offset,
1122 struct cache_tree *fsck_extent_cache;
1123 struct cache_tree *corrupt_blocks;
1128 * in ram representation of the tree. extent_root is used for all allocations
1129 * and for the extent tree extent_root root.
1132 struct extent_buffer *node;
1133 struct extent_buffer *commit_root;
1134 struct btrfs_root_item root_item;
1135 struct btrfs_key root_key;
1136 struct btrfs_fs_info *fs_info;
1140 /* data allocations are done in sectorsize units */
1143 /* node allocations are done in nodesize units */
1146 /* Unused, equal to nodesize */
1149 /* leaf allocations are done in nodesize units */
1158 u64 last_inode_alloc;
1161 * Record orphan data extent ref
1163 * TODO: Don't restore things in btrfs_root.
1164 * Directly record it into inode_record, which needs a lot of
1165 * infrastructure change to allow cooperation between extent
1168 struct list_head orphan_data_extents;
1170 /* the dirty list is only used by non-reference counted roots */
1171 struct list_head dirty_list;
1172 struct rb_node rb_node;
1176 * inode items have the data typically returned from stat and store other
1177 * info about object characteristics. There is one for every file and dir in
1180 #define BTRFS_INODE_ITEM_KEY 1
1181 #define BTRFS_INODE_REF_KEY 12
1182 #define BTRFS_INODE_EXTREF_KEY 13
1183 #define BTRFS_XATTR_ITEM_KEY 24
1184 #define BTRFS_ORPHAN_ITEM_KEY 48
1186 #define BTRFS_DIR_LOG_ITEM_KEY 60
1187 #define BTRFS_DIR_LOG_INDEX_KEY 72
1189 * dir items are the name -> inode pointers in a directory. There is one
1190 * for every name in a directory.
1192 #define BTRFS_DIR_ITEM_KEY 84
1193 #define BTRFS_DIR_INDEX_KEY 96
1196 * extent data is for file data
1198 #define BTRFS_EXTENT_DATA_KEY 108
1201 * csum items have the checksums for data in the extents
1203 #define BTRFS_CSUM_ITEM_KEY 120
1205 * extent csums are stored in a separate tree and hold csums for
1206 * an entire extent on disk.
1208 #define BTRFS_EXTENT_CSUM_KEY 128
1211 * root items point to tree roots. There are typically in the root
1212 * tree used by the super block to find all the other trees
1214 #define BTRFS_ROOT_ITEM_KEY 132
1217 * root backrefs tie subvols and snapshots to the directory entries that
1220 #define BTRFS_ROOT_BACKREF_KEY 144
1223 * root refs make a fast index for listing all of the snapshots and
1224 * subvolumes referenced by a given root. They point directly to the
1225 * directory item in the root that references the subvol
1227 #define BTRFS_ROOT_REF_KEY 156
1230 * extent items are in the extent map tree. These record which blocks
1231 * are used, and how many references there are to each block
1233 #define BTRFS_EXTENT_ITEM_KEY 168
1236 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1237 * the length, so we save the level in key->offset instead of the length.
1239 #define BTRFS_METADATA_ITEM_KEY 169
1241 #define BTRFS_TREE_BLOCK_REF_KEY 176
1243 #define BTRFS_EXTENT_DATA_REF_KEY 178
1245 /* old style extent backrefs */
1246 #define BTRFS_EXTENT_REF_V0_KEY 180
1248 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1250 #define BTRFS_SHARED_DATA_REF_KEY 184
1254 * block groups give us hints into the extent allocation trees. Which
1255 * blocks are free etc etc
1257 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1260 * Every block group is represented in the free space tree by a free space info
1261 * item, which stores some accounting information. It is keyed on
1262 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1264 #define BTRFS_FREE_SPACE_INFO_KEY 198
1267 * A free space extent tracks an extent of space that is free in a block group.
1268 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1270 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1273 * When a block group becomes very fragmented, we convert it to use bitmaps
1274 * instead of extents. A free space bitmap is keyed on
1275 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1276 * (length / sectorsize) bits.
1278 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1280 #define BTRFS_DEV_EXTENT_KEY 204
1281 #define BTRFS_DEV_ITEM_KEY 216
1282 #define BTRFS_CHUNK_ITEM_KEY 228
1284 #define BTRFS_BALANCE_ITEM_KEY 248
1289 #define BTRFS_QGROUP_STATUS_KEY 240
1290 #define BTRFS_QGROUP_INFO_KEY 242
1291 #define BTRFS_QGROUP_LIMIT_KEY 244
1292 #define BTRFS_QGROUP_RELATION_KEY 246
1295 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1297 #define BTRFS_BALANCE_ITEM_KEY 248
1300 * The key type for tree items that are stored persistently, but do not need to
1301 * exist for extended period of time. The items can exist in any tree.
1303 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1307 * - balance status item
1308 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1310 #define BTRFS_TEMPORARY_ITEM_KEY 248
1313 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1315 #define BTRFS_DEV_STATS_KEY 249
1318 * The key type for tree items that are stored persistently and usually exist
1319 * for a long period, eg. filesystem lifetime. The item kinds can be status
1320 * information, stats or preference values. The item can exist in any tree.
1322 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1326 * - device statistics, store IO stats in the device tree, one key for all
1328 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1330 #define BTRFS_PERSISTENT_ITEM_KEY 249
1333 * Persistently stores the device replace state in the device tree.
1334 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1336 #define BTRFS_DEV_REPLACE_KEY 250
1339 * Stores items that allow to quickly map UUIDs to something else.
1340 * These items are part of the filesystem UUID tree.
1341 * The key is built like this:
1342 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1344 #if BTRFS_UUID_SIZE != 16
1345 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1347 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1348 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1349 * received subvols */
1352 * string items are for debugging. They just store a short string of
1355 #define BTRFS_STRING_ITEM_KEY 253
1359 #define BTRFS_INODE_NODATASUM (1 << 0)
1360 #define BTRFS_INODE_NODATACOW (1 << 1)
1361 #define BTRFS_INODE_READONLY (1 << 2)
1362 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1363 #define BTRFS_INODE_PREALLOC (1 << 4)
1364 #define BTRFS_INODE_SYNC (1 << 5)
1365 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1366 #define BTRFS_INODE_APPEND (1 << 7)
1367 #define BTRFS_INODE_NODUMP (1 << 8)
1368 #define BTRFS_INODE_NOATIME (1 << 9)
1369 #define BTRFS_INODE_DIRSYNC (1 << 10)
1370 #define BTRFS_INODE_COMPRESS (1 << 11)
1372 #define read_eb_member(eb, ptr, type, member, result) ( \
1373 read_extent_buffer(eb, (char *)(result), \
1374 ((unsigned long)(ptr)) + \
1375 offsetof(type, member), \
1376 sizeof(((type *)0)->member)))
1378 #define write_eb_member(eb, ptr, type, member, result) ( \
1379 write_extent_buffer(eb, (char *)(result), \
1380 ((unsigned long)(ptr)) + \
1381 offsetof(type, member), \
1382 sizeof(((type *)0)->member)))
1384 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1385 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1387 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1388 return le##bits##_to_cpu(h->member); \
1390 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1393 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1394 h->member = cpu_to_le##bits(val); \
1397 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1398 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1401 unsigned long offset = (unsigned long)s; \
1402 const type *p = (type *) (eb->data + offset); \
1403 return get_unaligned_le##bits(&p->member); \
1405 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1406 type *s, u##bits val) \
1408 unsigned long offset = (unsigned long)s; \
1409 type *p = (type *) (eb->data + offset); \
1410 put_unaligned_le##bits(val, &p->member); \
1413 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1414 static inline u##bits btrfs_##name(const type *s) \
1416 return le##bits##_to_cpu(s->member); \
1418 static inline void btrfs_set_##name(type *s, u##bits val) \
1420 s->member = cpu_to_le##bits(val); \
1423 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1424 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1425 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1426 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1427 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1428 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1430 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1431 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1432 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1433 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1434 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1435 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1437 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1438 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1440 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1442 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1444 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1446 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1448 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1449 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1451 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1453 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1455 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1458 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1460 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1463 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1465 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1468 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1469 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1470 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1471 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1472 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1473 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1474 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1475 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1476 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1477 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1478 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1480 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1482 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1485 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1486 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1487 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1489 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1491 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1493 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1495 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1496 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1498 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1500 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1501 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1503 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1506 unsigned long offset = (unsigned long)c;
1507 offset += offsetof(struct btrfs_chunk, stripe);
1508 offset += nr * sizeof(struct btrfs_stripe);
1509 return (struct btrfs_stripe *)offset;
1512 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1514 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1517 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1518 struct btrfs_chunk *c, int nr)
1520 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1523 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1524 struct btrfs_chunk *c, int nr,
1527 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1530 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1531 struct btrfs_chunk *c, int nr)
1533 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1536 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1537 struct btrfs_chunk *c, int nr,
1540 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1543 /* struct btrfs_block_group_item */
1544 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1546 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1548 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1549 struct btrfs_block_group_item, chunk_objectid, 64);
1551 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1552 struct btrfs_block_group_item, chunk_objectid, 64);
1553 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1554 struct btrfs_block_group_item, flags, 64);
1555 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1556 struct btrfs_block_group_item, flags, 64);
1558 /* struct btrfs_free_space_info */
1559 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1561 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1563 /* struct btrfs_inode_ref */
1564 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1565 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1566 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1568 /* struct btrfs_inode_extref */
1569 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1570 parent_objectid, 64);
1571 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1573 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1575 /* struct btrfs_inode_item */
1576 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1577 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1578 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1579 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1580 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1581 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1582 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1583 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1584 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1585 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1586 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1587 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1589 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1590 struct btrfs_inode_item, generation, 64);
1591 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1592 struct btrfs_inode_item, sequence, 64);
1593 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1594 struct btrfs_inode_item, transid, 64);
1595 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1596 struct btrfs_inode_item, size, 64);
1597 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1598 struct btrfs_inode_item, nbytes, 64);
1599 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1600 struct btrfs_inode_item, block_group, 64);
1601 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1602 struct btrfs_inode_item, nlink, 32);
1603 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1604 struct btrfs_inode_item, uid, 32);
1605 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1606 struct btrfs_inode_item, gid, 32);
1607 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1608 struct btrfs_inode_item, mode, 32);
1609 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1610 struct btrfs_inode_item, rdev, 64);
1611 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1612 struct btrfs_inode_item, flags, 64);
1614 static inline struct btrfs_timespec *
1615 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1617 unsigned long ptr = (unsigned long)inode_item;
1618 ptr += offsetof(struct btrfs_inode_item, atime);
1619 return (struct btrfs_timespec *)ptr;
1622 static inline struct btrfs_timespec *
1623 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1625 unsigned long ptr = (unsigned long)inode_item;
1626 ptr += offsetof(struct btrfs_inode_item, mtime);
1627 return (struct btrfs_timespec *)ptr;
1630 static inline struct btrfs_timespec *
1631 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1633 unsigned long ptr = (unsigned long)inode_item;
1634 ptr += offsetof(struct btrfs_inode_item, ctime);
1635 return (struct btrfs_timespec *)ptr;
1638 static inline struct btrfs_timespec *
1639 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1641 unsigned long ptr = (unsigned long)inode_item;
1642 ptr += offsetof(struct btrfs_inode_item, otime);
1643 return (struct btrfs_timespec *)ptr;
1646 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1647 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1648 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1650 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1653 /* struct btrfs_dev_extent */
1654 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1656 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1657 chunk_objectid, 64);
1658 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1660 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1662 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1665 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1667 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1668 return (u8 *)((unsigned long)dev + ptr);
1672 /* struct btrfs_extent_item */
1673 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1674 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1675 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1677 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1678 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1680 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1682 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1684 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1685 struct btrfs_tree_block_info *item,
1686 struct btrfs_disk_key *key)
1688 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1691 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1692 struct btrfs_tree_block_info *item,
1693 struct btrfs_disk_key *key)
1695 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1698 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1700 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1702 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1704 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1707 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1710 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1712 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1714 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1715 struct btrfs_extent_inline_ref, type, 8);
1716 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1717 struct btrfs_extent_inline_ref, offset, 64);
1719 static inline u32 btrfs_extent_inline_ref_size(int type)
1721 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1722 type == BTRFS_SHARED_BLOCK_REF_KEY)
1723 return sizeof(struct btrfs_extent_inline_ref);
1724 if (type == BTRFS_SHARED_DATA_REF_KEY)
1725 return sizeof(struct btrfs_shared_data_ref) +
1726 sizeof(struct btrfs_extent_inline_ref);
1727 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1728 return sizeof(struct btrfs_extent_data_ref) +
1729 offsetof(struct btrfs_extent_inline_ref, offset);
1734 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1735 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1737 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1738 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1740 /* struct btrfs_node */
1741 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1742 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1744 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1747 ptr = offsetof(struct btrfs_node, ptrs) +
1748 sizeof(struct btrfs_key_ptr) * nr;
1749 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1752 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1756 ptr = offsetof(struct btrfs_node, ptrs) +
1757 sizeof(struct btrfs_key_ptr) * nr;
1758 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1761 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1764 ptr = offsetof(struct btrfs_node, ptrs) +
1765 sizeof(struct btrfs_key_ptr) * nr;
1766 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1769 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1773 ptr = offsetof(struct btrfs_node, ptrs) +
1774 sizeof(struct btrfs_key_ptr) * nr;
1775 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1778 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1780 return offsetof(struct btrfs_node, ptrs) +
1781 sizeof(struct btrfs_key_ptr) * nr;
1784 static inline void btrfs_node_key(struct extent_buffer *eb,
1785 struct btrfs_disk_key *disk_key, int nr)
1788 ptr = btrfs_node_key_ptr_offset(nr);
1789 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1790 struct btrfs_key_ptr, key, disk_key);
1793 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1794 struct btrfs_disk_key *disk_key, int nr)
1797 ptr = btrfs_node_key_ptr_offset(nr);
1798 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1799 struct btrfs_key_ptr, key, disk_key);
1802 /* struct btrfs_item */
1803 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1804 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1806 static inline unsigned long btrfs_item_nr_offset(int nr)
1808 return offsetof(struct btrfs_leaf, items) +
1809 sizeof(struct btrfs_item) * nr;
1812 static inline struct btrfs_item *btrfs_item_nr(int nr)
1814 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1817 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1818 struct btrfs_item *item)
1820 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1823 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1825 return btrfs_item_end(eb, btrfs_item_nr(nr));
1828 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1830 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1833 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1835 return btrfs_item_size(eb, btrfs_item_nr(nr));
1838 static inline void btrfs_item_key(struct extent_buffer *eb,
1839 struct btrfs_disk_key *disk_key, int nr)
1841 struct btrfs_item *item = btrfs_item_nr(nr);
1842 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1845 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1846 struct btrfs_disk_key *disk_key, int nr)
1848 struct btrfs_item *item = btrfs_item_nr(nr);
1849 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1852 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1855 * struct btrfs_root_ref
1857 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1858 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1859 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1861 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1862 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1863 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1865 /* struct btrfs_dir_item */
1866 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1867 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1868 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1869 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1871 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1872 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1873 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1874 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1876 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1877 struct btrfs_dir_item *item,
1878 struct btrfs_disk_key *key)
1880 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1883 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1884 struct btrfs_dir_item *item,
1885 struct btrfs_disk_key *key)
1887 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1890 /* struct btrfs_free_space_header */
1891 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1893 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1895 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1898 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1899 struct btrfs_free_space_header *h,
1900 struct btrfs_disk_key *key)
1902 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1905 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1906 struct btrfs_free_space_header *h,
1907 struct btrfs_disk_key *key)
1909 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1912 /* struct btrfs_disk_key */
1913 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1915 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1916 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1918 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1919 struct btrfs_disk_key *disk)
1921 cpu->offset = le64_to_cpu(disk->offset);
1922 cpu->type = disk->type;
1923 cpu->objectid = le64_to_cpu(disk->objectid);
1926 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1927 struct btrfs_key *cpu)
1929 disk->offset = cpu_to_le64(cpu->offset);
1930 disk->type = cpu->type;
1931 disk->objectid = cpu_to_le64(cpu->objectid);
1934 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1935 struct btrfs_key *key, int nr)
1937 struct btrfs_disk_key disk_key;
1938 btrfs_node_key(eb, &disk_key, nr);
1939 btrfs_disk_key_to_cpu(key, &disk_key);
1942 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1943 struct btrfs_key *key, int nr)
1945 struct btrfs_disk_key disk_key;
1946 btrfs_item_key(eb, &disk_key, nr);
1947 btrfs_disk_key_to_cpu(key, &disk_key);
1950 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1951 struct btrfs_dir_item *item,
1952 struct btrfs_key *key)
1954 struct btrfs_disk_key disk_key;
1955 btrfs_dir_item_key(eb, item, &disk_key);
1956 btrfs_disk_key_to_cpu(key, &disk_key);
1959 /* struct btrfs_header */
1960 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1961 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1963 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1964 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1965 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1966 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1967 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1968 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1970 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1971 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1974 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1976 return (btrfs_header_flags(eb) & flag) == flag;
1979 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1981 u64 flags = btrfs_header_flags(eb);
1982 btrfs_set_header_flags(eb, flags | flag);
1983 return (flags & flag) == flag;
1986 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1988 u64 flags = btrfs_header_flags(eb);
1989 btrfs_set_header_flags(eb, flags & ~flag);
1990 return (flags & flag) == flag;
1993 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1995 u64 flags = btrfs_header_flags(eb);
1996 return flags >> BTRFS_BACKREF_REV_SHIFT;
1999 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2002 u64 flags = btrfs_header_flags(eb);
2003 flags &= ~BTRFS_BACKREF_REV_MASK;
2004 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2005 btrfs_set_header_flags(eb, flags);
2008 static inline unsigned long btrfs_header_fsid(void)
2010 return offsetof(struct btrfs_header, fsid);
2013 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2015 return offsetof(struct btrfs_header, chunk_tree_uuid);
2018 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
2020 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
2024 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
2026 unsigned long ptr = offsetof(struct btrfs_header, csum);
2030 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
2035 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
2040 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
2045 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2047 return (btrfs_header_level(eb) == 0);
2050 /* struct btrfs_root_item */
2051 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2053 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2054 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2055 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2057 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2059 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2060 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2061 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2062 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2063 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2064 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2065 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2066 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2068 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2070 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2072 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2074 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2076 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2079 /* struct btrfs_root_backup */
2080 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2082 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2084 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2085 tree_root_level, 8);
2087 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2089 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2090 chunk_root_gen, 64);
2091 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2092 chunk_root_level, 8);
2094 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2096 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2097 extent_root_gen, 64);
2098 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2099 extent_root_level, 8);
2101 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2103 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2105 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2108 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2110 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2112 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2115 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2117 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2119 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2120 csum_root_level, 8);
2121 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2123 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2125 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2128 /* struct btrfs_super_block */
2130 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2131 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2132 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2134 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2135 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2136 struct btrfs_super_block, sys_chunk_array_size, 32);
2137 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2138 struct btrfs_super_block, chunk_root_generation, 64);
2139 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2141 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2143 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2144 chunk_root_level, 8);
2145 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2147 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2148 log_root_transid, 64);
2149 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2151 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2153 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2155 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2157 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2159 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2161 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2163 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2164 root_dir_objectid, 64);
2165 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2167 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2169 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2170 compat_ro_flags, 64);
2171 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2172 incompat_flags, 64);
2173 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2175 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2176 cache_generation, 64);
2177 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2178 uuid_tree_generation, 64);
2179 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2181 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2183 int t = btrfs_super_csum_type(s);
2184 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2185 return btrfs_csum_sizes[t];
2188 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2190 return offsetof(struct btrfs_leaf, items);
2193 /* struct btrfs_file_extent_item */
2194 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2195 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2197 static inline unsigned long btrfs_file_extent_inline_start(struct
2198 btrfs_file_extent_item *e)
2200 unsigned long offset = (unsigned long)e;
2201 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2205 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2207 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2210 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2212 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2214 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2216 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2218 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2219 disk_num_bytes, 64);
2220 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2222 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2224 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2226 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2228 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2230 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2232 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2234 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2236 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2238 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2239 other_encoding, 16);
2241 /* btrfs_qgroup_status_item */
2242 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2244 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2246 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2248 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2251 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2252 struct btrfs_qgroup_status_item, version, 64);
2253 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2254 struct btrfs_qgroup_status_item, generation, 64);
2255 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2256 struct btrfs_qgroup_status_item, flags, 64);
2257 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2258 struct btrfs_qgroup_status_item, rescan, 64);
2260 /* btrfs_qgroup_info_item */
2261 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2263 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2265 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2266 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2267 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2269 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2270 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2272 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2273 struct btrfs_qgroup_info_item, generation, 64);
2274 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2275 struct btrfs_qgroup_info_item, referenced, 64);
2276 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2277 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2278 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2279 struct btrfs_qgroup_info_item, exclusive, 64);
2280 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2281 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2283 /* btrfs_qgroup_limit_item */
2284 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2286 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2287 max_referenced, 64);
2288 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2290 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2291 rsv_referenced, 64);
2292 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2295 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2296 struct btrfs_qgroup_limit_item, flags, 64);
2297 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2298 struct btrfs_qgroup_limit_item, max_referenced, 64);
2299 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2300 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2301 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2302 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2303 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2304 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2306 /* btrfs_balance_item */
2307 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
2309 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
2310 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2312 unsigned long offset = (unsigned long)bi;
2313 struct btrfs_balance_item *p;
2314 p = (struct btrfs_balance_item *)(eb->data + offset);
2318 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
2319 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2321 unsigned long offset = (unsigned long)bi;
2322 struct btrfs_balance_item *p;
2323 p = (struct btrfs_balance_item *)(eb->data + offset);
2327 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
2328 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2330 unsigned long offset = (unsigned long)bi;
2331 struct btrfs_balance_item *p;
2332 p = (struct btrfs_balance_item *)(eb->data + offset);
2337 * this returns the number of bytes used by the item on disk, minus the
2338 * size of any extent headers. If a file is compressed on disk, this is
2339 * the compressed size
2341 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2342 struct btrfs_item *e)
2344 unsigned long offset;
2345 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2346 return btrfs_item_size(eb, e) - offset;
2349 /* struct btrfs_ioctl_search_header */
2350 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2352 return get_unaligned_64(&sh->transid);
2355 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2357 return get_unaligned_64(&sh->objectid);
2360 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2362 return get_unaligned_64(&sh->offset);
2365 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2367 return get_unaligned_32(&sh->type);
2370 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2372 return get_unaligned_32(&sh->len);
2375 /* this returns the number of file bytes represented by the inline item.
2376 * If an item is compressed, this is the uncompressed size
2378 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2380 struct btrfs_file_extent_item *fi)
2383 * return the space used on disk if this item isn't
2384 * compressed or encoded
2386 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2387 btrfs_file_extent_encryption(eb, fi) == 0 &&
2388 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2389 return btrfs_file_extent_inline_item_len(eb,
2390 btrfs_item_nr(slot));
2393 /* otherwise use the ram bytes field */
2394 return btrfs_file_extent_ram_bytes(eb, fi);
2398 * NOTE: Backward compatibility, do not use.
2399 * Replacement: read nodesize directly
2401 __attribute__((deprecated))
2402 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2404 return root->leafsize;
2405 return root->nodesize;
2408 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2410 struct btrfs_super_block *disk_super;
2411 disk_super = fs_info->super_copy;
2412 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2415 static inline int btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2417 struct btrfs_super_block *disk_super;
2418 disk_super = fs_info->super_copy;
2419 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2422 /* helper function to cast into the data area of the leaf. */
2423 #define btrfs_item_ptr(leaf, slot, type) \
2424 ((type *)(btrfs_leaf_data(leaf) + \
2425 btrfs_item_offset_nr(leaf, slot)))
2427 #define btrfs_item_ptr_offset(leaf, slot) \
2428 ((unsigned long)(btrfs_leaf_data(leaf) + \
2429 btrfs_item_offset_nr(leaf, slot)))
2432 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2433 struct btrfs_root *root,
2434 u64 num_bytes, u64 empty_size,
2435 u64 hint_byte, u64 search_end,
2436 struct btrfs_key *ins, int data);
2437 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2438 struct btrfs_root *root);
2439 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2440 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2441 u64 bytenr, u64 num_bytes);
2442 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2443 struct btrfs_root *root);
2444 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2445 btrfs_fs_info *info,
2447 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2448 btrfs_fs_info *info,
2450 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2451 struct btrfs_root *root,
2452 u32 blocksize, u64 root_objectid,
2453 struct btrfs_disk_key *key, int level,
2454 u64 hint, u64 empty_size);
2455 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2456 struct btrfs_root *root,
2457 u64 num_bytes, u64 parent,
2458 u64 root_objectid, u64 ref_generation,
2459 u64 owner, u64 empty_size, u64 hint_byte,
2460 u64 search_end, struct btrfs_key *ins, int data);
2461 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2462 struct btrfs_root *root, u64 bytenr,
2463 u64 offset, int metadata, u64 *refs, u64 *flags);
2464 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2465 struct btrfs_root *root,
2466 u64 bytenr, int level, u64 flags);
2467 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2468 struct extent_buffer *buf, int record_parent);
2469 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2470 struct extent_buffer *buf, int record_parent);
2471 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2472 struct btrfs_root *root,
2473 u64 bytenr, u64 num_bytes, u64 parent,
2474 u64 root_objectid, u64 owner, u64 offset);
2475 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2476 struct btrfs_root *root,
2477 struct extent_io_tree *unpin);
2478 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2479 struct btrfs_root *root,
2480 u64 bytenr, u64 num_bytes, u64 parent,
2481 u64 root_objectid, u64 ref_generation,
2482 u64 owner_objectid);
2483 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2484 struct btrfs_root *root, u64 bytenr,
2485 u64 orig_parent, u64 parent,
2486 u64 root_objectid, u64 ref_generation,
2487 u64 owner_objectid);
2488 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2489 struct btrfs_root *root);
2490 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2491 int btrfs_read_block_groups(struct btrfs_root *root);
2492 struct btrfs_block_group_cache *
2493 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2494 u64 chunk_objectid, u64 chunk_offset, u64 size);
2495 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2496 struct btrfs_root *root, u64 bytes_used,
2497 u64 type, u64 chunk_objectid, u64 chunk_offset,
2499 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2500 struct btrfs_root *root);
2501 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2502 struct btrfs_root *root, u64 bytenr, u64 num,
2503 int alloc, int mark_free);
2504 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2505 struct btrfs_root *root, u64 objectid,
2506 struct btrfs_inode_item *inode,
2507 u64 file_pos, u64 disk_bytenr,
2509 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2510 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2511 void free_excluded_extents(struct btrfs_root *root,
2512 struct btrfs_block_group_cache *cache);
2513 int exclude_super_stripes(struct btrfs_root *root,
2514 struct btrfs_block_group_cache *cache);
2515 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2516 struct btrfs_fs_info *info, u64 start, u64 end);
2517 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2520 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2521 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2522 struct btrfs_path *path, int level, int slot);
2523 enum btrfs_tree_block_status
2524 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2525 struct extent_buffer *buf);
2526 enum btrfs_tree_block_status
2527 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2528 struct extent_buffer *buf);
2529 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2530 int level, int slot, u64 objectid);
2531 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2532 struct extent_buffer *parent, int slot);
2533 int btrfs_previous_item(struct btrfs_root *root,
2534 struct btrfs_path *path, u64 min_objectid,
2536 int btrfs_previous_extent_item(struct btrfs_root *root,
2537 struct btrfs_path *path, u64 min_objectid);
2538 int btrfs_next_extent_item(struct btrfs_root *root,
2539 struct btrfs_path *path, u64 max_objectid);
2540 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2541 struct btrfs_root *root, struct extent_buffer *buf,
2542 struct extent_buffer *parent, int parent_slot,
2543 struct extent_buffer **cow_ret);
2544 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2545 struct btrfs_root *root,
2546 struct extent_buffer *buf,
2547 struct extent_buffer *parent, int parent_slot,
2548 struct extent_buffer **cow_ret,
2549 u64 search_start, u64 empty_size);
2550 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2551 struct btrfs_root *root,
2552 struct extent_buffer *buf,
2553 struct extent_buffer **cow_ret, u64 new_root_objectid);
2554 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2555 *root, struct btrfs_path *path, u32 data_size);
2556 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2557 struct btrfs_root *root,
2558 struct btrfs_path *path,
2559 u32 new_size, int from_end);
2560 int btrfs_split_item(struct btrfs_trans_handle *trans,
2561 struct btrfs_root *root,
2562 struct btrfs_path *path,
2563 struct btrfs_key *new_key,
2564 unsigned long split_offset);
2565 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2566 *root, struct btrfs_key *key, struct btrfs_path *p, int
2568 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2569 u64 iobjectid, u64 ioff, u8 key_type,
2570 struct btrfs_key *found_key);
2571 void btrfs_release_path(struct btrfs_path *p);
2572 void add_root_to_dirty_list(struct btrfs_root *root);
2573 struct btrfs_path *btrfs_alloc_path(void);
2574 void btrfs_free_path(struct btrfs_path *p);
2575 void btrfs_init_path(struct btrfs_path *p);
2576 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2577 struct btrfs_path *path, int slot, int nr);
2579 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2580 struct btrfs_root *root,
2581 struct btrfs_path *path)
2583 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2586 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2587 *root, struct btrfs_key *key, void *data, u32 data_size);
2588 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2589 struct btrfs_root *root,
2590 struct btrfs_path *path,
2591 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2593 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2594 struct btrfs_root *root,
2595 struct btrfs_path *path,
2596 struct btrfs_key *key,
2599 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2602 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2603 static inline int btrfs_next_item(struct btrfs_root *root,
2604 struct btrfs_path *p)
2607 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2608 return btrfs_next_leaf(root, p);
2612 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2613 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2614 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2615 struct btrfs_disk_key *key, int level);
2616 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2617 struct btrfs_key *new_key);
2618 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2619 struct btrfs_path *path,
2620 struct btrfs_key *new_key);
2623 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2624 struct btrfs_root *tree_root,
2625 u64 root_id, u8 type, u64 ref_id,
2626 u64 dirid, u64 sequence,
2627 const char *name, int name_len);
2628 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2629 *root, struct btrfs_key *key, struct btrfs_root_item
2631 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2632 *root, struct btrfs_key *key, struct btrfs_root_item
2634 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2635 btrfs_root_item *item, struct btrfs_key *key);
2637 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2638 *root, const char *name, int name_len, u64 dir,
2639 struct btrfs_key *location, u8 type, u64 index);
2640 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2641 struct btrfs_root *root,
2642 struct btrfs_path *path, u64 dir,
2643 const char *name, int name_len,
2645 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2646 struct btrfs_root *root,
2647 struct btrfs_path *path, u64 dir,
2648 const char *name, int name_len,
2649 u64 index, int mod);
2650 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2651 struct btrfs_root *root,
2652 struct btrfs_path *path,
2653 struct btrfs_dir_item *di);
2654 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2655 struct btrfs_root *root, const char *name,
2656 u16 name_len, const void *data, u16 data_len,
2659 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2660 struct btrfs_root *fs_root,
2661 u64 dirid, u64 *objectid);
2664 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2665 struct btrfs_root *root,
2666 const char *name, int name_len,
2667 u64 inode_objectid, u64 ref_objectid, u64 index);
2668 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2669 *root, u64 objectid, struct btrfs_inode_item
2671 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2672 *root, struct btrfs_path *path,
2673 struct btrfs_key *location, int mod);
2674 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2675 *trans, struct btrfs_path *path, struct btrfs_root *root,
2676 u64 ino, u64 parent_ino, u64 index, const char *name,
2677 int namelen, int ins_len);
2678 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2679 struct btrfs_root *root,
2680 const char *name, int name_len,
2681 u64 inode_objectid, u64 ref_objectid,
2683 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2684 struct btrfs_root *root,
2685 const char *name, int name_len,
2686 u64 inode_objectid, u64 ref_objectid, u64 index);
2687 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2688 struct btrfs_root *root, struct btrfs_path *path,
2689 const char *name, int namelen, u64 ino, u64 parent_ino,
2690 u64 index, int ins_len);
2691 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2692 struct btrfs_root *root, const char *name, int name_len,
2693 u64 ino, u64 parent_ino, u64 *index);
2696 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2697 struct btrfs_root *root, u64 bytenr, u64 len);
2698 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2699 struct btrfs_root *root,
2700 u64 objectid, u64 pos, u64 offset,
2703 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2704 struct btrfs_root *root, u64 objectid,
2705 u64 offset, char *buffer, size_t size);
2706 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2707 struct btrfs_root *root, u64 alloc_end,
2708 u64 bytenr, char *data, size_t len);
2709 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2710 struct btrfs_root *root, struct btrfs_path *path,
2714 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2715 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2718 static inline int is_fstree(u64 rootid)
2720 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2721 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2727 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2728 u64 dir, u64 index);
2729 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2731 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2732 struct btrfs_root *root, u64 ino, u64 flags);
2733 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2734 u64 ino, u64 parent_ino, char *name, int namelen,
2735 u8 type, u64 *index, int add_backref);
2736 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2737 u64 ino, u64 parent_ino, u64 index, const char *name,
2738 int namelen, int add_orphan);
2739 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2740 struct btrfs_root *root, struct btrfs_path *path,
2742 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2743 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2746 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2747 struct btrfs_root *root,
2748 struct btrfs_path *path,
2749 u64 ino, u64 offset, u64 len, int ins_len);
2750 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2751 struct btrfs_root *root,
2752 u64 ino, u64 offset, u64 len);