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_dev_stats_item {
924 * grow this item struct at the end for future enhancements and keep
925 * the existing values unchanged
927 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
928 } __attribute__ ((__packed__));
930 struct btrfs_csum_item {
932 } __attribute__ ((__packed__));
935 * We don't want to overwrite 1M at the beginning of device, even though
936 * there is our 1st superblock at 64k. Some possible reasons:
937 * - the first 64k blank is useful for some boot loader/manager
938 * - the first 1M could be scratched by buggy partitioner or somesuch
940 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
942 /* tag for the radix tree of block groups in ram */
943 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
944 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
945 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
946 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
947 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
948 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
949 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
950 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
951 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
952 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
953 #define BTRFS_NR_RAID_TYPES 7
955 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
956 BTRFS_BLOCK_GROUP_SYSTEM | \
957 BTRFS_BLOCK_GROUP_METADATA)
959 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
960 BTRFS_BLOCK_GROUP_RAID1 | \
961 BTRFS_BLOCK_GROUP_RAID5 | \
962 BTRFS_BLOCK_GROUP_RAID6 | \
963 BTRFS_BLOCK_GROUP_DUP | \
964 BTRFS_BLOCK_GROUP_RAID10)
966 /* used in struct btrfs_balance_args fields */
967 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
970 * GLOBAL_RSV does not exist as a on-disk block group type and is used
971 * internally for exporting info about global block reserve from space infos
973 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
975 #define BTRFS_QGROUP_LEVEL_SHIFT 48
977 static inline u64 btrfs_qgroup_level(u64 qgroupid)
979 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
982 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
984 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
987 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
988 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
989 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
991 struct btrfs_qgroup_status_item {
995 __le64 rescan; /* progress during scanning */
996 } __attribute__ ((__packed__));
998 struct btrfs_block_group_item {
1000 __le64 chunk_objectid;
1002 } __attribute__ ((__packed__));
1004 struct btrfs_free_space_info {
1005 __le32 extent_count;
1007 } __attribute__ ((__packed__));
1009 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1011 struct btrfs_qgroup_info_item {
1014 __le64 referenced_compressed;
1016 __le64 exclusive_compressed;
1017 } __attribute__ ((__packed__));
1019 /* flags definition for qgroup limits */
1020 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1021 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1022 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1023 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1024 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1025 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1027 struct btrfs_qgroup_limit_item {
1029 __le64 max_referenced;
1030 __le64 max_exclusive;
1031 __le64 rsv_referenced;
1032 __le64 rsv_exclusive;
1033 } __attribute__ ((__packed__));
1035 struct btrfs_space_info {
1041 struct list_head list;
1044 struct btrfs_block_group_cache {
1045 struct cache_extent cache;
1046 struct btrfs_key key;
1047 struct btrfs_block_group_item item;
1048 struct btrfs_space_info *space_info;
1049 struct btrfs_free_space_ctl *free_space_ctl;
1057 struct btrfs_device;
1058 struct btrfs_fs_devices;
1059 struct btrfs_fs_info {
1060 u8 fsid[BTRFS_FSID_SIZE];
1062 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1063 u8 *new_chunk_tree_uuid;
1064 struct btrfs_root *fs_root;
1065 struct btrfs_root *extent_root;
1066 struct btrfs_root *tree_root;
1067 struct btrfs_root *chunk_root;
1068 struct btrfs_root *dev_root;
1069 struct btrfs_root *csum_root;
1070 struct btrfs_root *quota_root;
1071 struct btrfs_root *free_space_root;
1073 struct rb_root fs_root_tree;
1075 /* the log root tree is a directory of all the other log roots */
1076 struct btrfs_root *log_root_tree;
1078 struct extent_io_tree extent_cache;
1079 struct extent_io_tree free_space_cache;
1080 struct extent_io_tree block_group_cache;
1081 struct extent_io_tree pinned_extents;
1082 struct extent_io_tree pending_del;
1083 struct extent_io_tree extent_ins;
1084 struct extent_io_tree *excluded_extents;
1086 /* logical->physical extent mapping */
1087 struct btrfs_mapping_tree mapping_tree;
1090 u64 last_trans_committed;
1092 u64 avail_data_alloc_bits;
1093 u64 avail_metadata_alloc_bits;
1094 u64 avail_system_alloc_bits;
1095 u64 data_alloc_profile;
1096 u64 metadata_alloc_profile;
1097 u64 system_alloc_profile;
1100 struct btrfs_trans_handle *running_transaction;
1101 struct btrfs_super_block *super_copy;
1102 struct mutex fs_mutex;
1107 struct list_head dirty_cowonly_roots;
1108 struct list_head recow_ebs;
1110 struct btrfs_fs_devices *fs_devices;
1111 struct list_head space_info;
1114 unsigned int readonly:1;
1115 unsigned int on_restoring:1;
1116 unsigned int is_chunk_recover:1;
1117 unsigned int quota_enabled:1;
1118 unsigned int suppress_check_block_errors:1;
1119 unsigned int ignore_fsid_mismatch:1;
1120 unsigned int ignore_chunk_tree_error:1;
1121 unsigned int avoid_meta_chunk_alloc:1;
1122 unsigned int avoid_sys_chunk_alloc:1;
1123 unsigned int finalize_on_close:1;
1125 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1126 struct btrfs_root *root,
1127 u64 bytenr, u64 num_bytes, u64 parent,
1128 u64 root_objectid, u64 owner, u64 offset,
1130 struct cache_tree *fsck_extent_cache;
1131 struct cache_tree *corrupt_blocks;
1136 * in ram representation of the tree. extent_root is used for all allocations
1137 * and for the extent tree extent_root root.
1140 struct extent_buffer *node;
1141 struct extent_buffer *commit_root;
1142 struct btrfs_root_item root_item;
1143 struct btrfs_key root_key;
1144 struct btrfs_fs_info *fs_info;
1148 /* data allocations are done in sectorsize units */
1151 /* node allocations are done in nodesize units */
1154 /* Unused, equal to nodesize */
1157 /* leaf allocations are done in nodesize units */
1166 u64 last_inode_alloc;
1169 * Record orphan data extent ref
1171 * TODO: Don't restore things in btrfs_root.
1172 * Directly record it into inode_record, which needs a lot of
1173 * infrastructure change to allow cooperation between extent
1176 struct list_head orphan_data_extents;
1178 /* the dirty list is only used by non-reference counted roots */
1179 struct list_head dirty_list;
1180 struct rb_node rb_node;
1184 * inode items have the data typically returned from stat and store other
1185 * info about object characteristics. There is one for every file and dir in
1188 #define BTRFS_INODE_ITEM_KEY 1
1189 #define BTRFS_INODE_REF_KEY 12
1190 #define BTRFS_INODE_EXTREF_KEY 13
1191 #define BTRFS_XATTR_ITEM_KEY 24
1192 #define BTRFS_ORPHAN_ITEM_KEY 48
1194 #define BTRFS_DIR_LOG_ITEM_KEY 60
1195 #define BTRFS_DIR_LOG_INDEX_KEY 72
1197 * dir items are the name -> inode pointers in a directory. There is one
1198 * for every name in a directory.
1200 #define BTRFS_DIR_ITEM_KEY 84
1201 #define BTRFS_DIR_INDEX_KEY 96
1204 * extent data is for file data
1206 #define BTRFS_EXTENT_DATA_KEY 108
1209 * csum items have the checksums for data in the extents
1211 #define BTRFS_CSUM_ITEM_KEY 120
1213 * extent csums are stored in a separate tree and hold csums for
1214 * an entire extent on disk.
1216 #define BTRFS_EXTENT_CSUM_KEY 128
1219 * root items point to tree roots. There are typically in the root
1220 * tree used by the super block to find all the other trees
1222 #define BTRFS_ROOT_ITEM_KEY 132
1225 * root backrefs tie subvols and snapshots to the directory entries that
1228 #define BTRFS_ROOT_BACKREF_KEY 144
1231 * root refs make a fast index for listing all of the snapshots and
1232 * subvolumes referenced by a given root. They point directly to the
1233 * directory item in the root that references the subvol
1235 #define BTRFS_ROOT_REF_KEY 156
1238 * extent items are in the extent map tree. These record which blocks
1239 * are used, and how many references there are to each block
1241 #define BTRFS_EXTENT_ITEM_KEY 168
1244 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1245 * the length, so we save the level in key->offset instead of the length.
1247 #define BTRFS_METADATA_ITEM_KEY 169
1249 #define BTRFS_TREE_BLOCK_REF_KEY 176
1251 #define BTRFS_EXTENT_DATA_REF_KEY 178
1253 /* old style extent backrefs */
1254 #define BTRFS_EXTENT_REF_V0_KEY 180
1256 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1258 #define BTRFS_SHARED_DATA_REF_KEY 184
1262 * block groups give us hints into the extent allocation trees. Which
1263 * blocks are free etc etc
1265 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1268 * Every block group is represented in the free space tree by a free space info
1269 * item, which stores some accounting information. It is keyed on
1270 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1272 #define BTRFS_FREE_SPACE_INFO_KEY 198
1275 * A free space extent tracks an extent of space that is free in a block group.
1276 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1278 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1281 * When a block group becomes very fragmented, we convert it to use bitmaps
1282 * instead of extents. A free space bitmap is keyed on
1283 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1284 * (length / sectorsize) bits.
1286 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1288 #define BTRFS_DEV_EXTENT_KEY 204
1289 #define BTRFS_DEV_ITEM_KEY 216
1290 #define BTRFS_CHUNK_ITEM_KEY 228
1292 #define BTRFS_BALANCE_ITEM_KEY 248
1297 #define BTRFS_QGROUP_STATUS_KEY 240
1298 #define BTRFS_QGROUP_INFO_KEY 242
1299 #define BTRFS_QGROUP_LIMIT_KEY 244
1300 #define BTRFS_QGROUP_RELATION_KEY 246
1303 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1305 #define BTRFS_BALANCE_ITEM_KEY 248
1308 * The key type for tree items that are stored persistently, but do not need to
1309 * exist for extended period of time. The items can exist in any tree.
1311 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1315 * - balance status item
1316 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1318 #define BTRFS_TEMPORARY_ITEM_KEY 248
1321 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1323 #define BTRFS_DEV_STATS_KEY 249
1326 * The key type for tree items that are stored persistently and usually exist
1327 * for a long period, eg. filesystem lifetime. The item kinds can be status
1328 * information, stats or preference values. The item can exist in any tree.
1330 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1334 * - device statistics, store IO stats in the device tree, one key for all
1336 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1338 #define BTRFS_PERSISTENT_ITEM_KEY 249
1341 * Persistently stores the device replace state in the device tree.
1342 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1344 #define BTRFS_DEV_REPLACE_KEY 250
1347 * Stores items that allow to quickly map UUIDs to something else.
1348 * These items are part of the filesystem UUID tree.
1349 * The key is built like this:
1350 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1352 #if BTRFS_UUID_SIZE != 16
1353 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1355 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1356 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1357 * received subvols */
1360 * string items are for debugging. They just store a short string of
1363 #define BTRFS_STRING_ITEM_KEY 253
1367 #define BTRFS_INODE_NODATASUM (1 << 0)
1368 #define BTRFS_INODE_NODATACOW (1 << 1)
1369 #define BTRFS_INODE_READONLY (1 << 2)
1370 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1371 #define BTRFS_INODE_PREALLOC (1 << 4)
1372 #define BTRFS_INODE_SYNC (1 << 5)
1373 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1374 #define BTRFS_INODE_APPEND (1 << 7)
1375 #define BTRFS_INODE_NODUMP (1 << 8)
1376 #define BTRFS_INODE_NOATIME (1 << 9)
1377 #define BTRFS_INODE_DIRSYNC (1 << 10)
1378 #define BTRFS_INODE_COMPRESS (1 << 11)
1380 #define read_eb_member(eb, ptr, type, member, result) ( \
1381 read_extent_buffer(eb, (char *)(result), \
1382 ((unsigned long)(ptr)) + \
1383 offsetof(type, member), \
1384 sizeof(((type *)0)->member)))
1386 #define write_eb_member(eb, ptr, type, member, result) ( \
1387 write_extent_buffer(eb, (char *)(result), \
1388 ((unsigned long)(ptr)) + \
1389 offsetof(type, member), \
1390 sizeof(((type *)0)->member)))
1392 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1393 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1395 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1396 return le##bits##_to_cpu(h->member); \
1398 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1401 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1402 h->member = cpu_to_le##bits(val); \
1405 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1406 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1409 unsigned long offset = (unsigned long)s; \
1410 const type *p = (type *) (eb->data + offset); \
1411 return get_unaligned_le##bits(&p->member); \
1413 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1414 type *s, u##bits val) \
1416 unsigned long offset = (unsigned long)s; \
1417 type *p = (type *) (eb->data + offset); \
1418 put_unaligned_le##bits(val, &p->member); \
1421 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1422 static inline u##bits btrfs_##name(const type *s) \
1424 return le##bits##_to_cpu(s->member); \
1426 static inline void btrfs_set_##name(type *s, u##bits val) \
1428 s->member = cpu_to_le##bits(val); \
1431 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1432 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1433 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1434 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1435 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1436 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1438 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1439 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1440 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1441 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1442 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1443 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1445 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1446 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1448 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1450 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1452 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1454 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1456 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1457 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1459 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1461 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1463 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1466 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1468 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1471 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1473 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1476 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1477 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1478 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1479 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1480 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1481 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1482 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1483 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1484 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1485 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1486 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1488 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1490 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1493 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1494 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1495 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1497 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1499 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1501 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1503 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1504 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1506 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1508 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1509 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1511 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1514 unsigned long offset = (unsigned long)c;
1515 offset += offsetof(struct btrfs_chunk, stripe);
1516 offset += nr * sizeof(struct btrfs_stripe);
1517 return (struct btrfs_stripe *)offset;
1520 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1522 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1525 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1526 struct btrfs_chunk *c, int nr)
1528 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1531 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1532 struct btrfs_chunk *c, int nr,
1535 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1538 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1539 struct btrfs_chunk *c, int nr)
1541 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1544 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1545 struct btrfs_chunk *c, int nr,
1548 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1551 /* struct btrfs_block_group_item */
1552 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1554 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1556 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1557 struct btrfs_block_group_item, chunk_objectid, 64);
1559 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1560 struct btrfs_block_group_item, chunk_objectid, 64);
1561 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1562 struct btrfs_block_group_item, flags, 64);
1563 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1564 struct btrfs_block_group_item, flags, 64);
1566 /* struct btrfs_free_space_info */
1567 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1569 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1571 /* struct btrfs_inode_ref */
1572 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1573 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1574 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1576 /* struct btrfs_inode_extref */
1577 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1578 parent_objectid, 64);
1579 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1581 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1583 /* struct btrfs_inode_item */
1584 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1585 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1586 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1587 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1588 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1589 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1590 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1591 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1592 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1593 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1594 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1595 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1597 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1598 struct btrfs_inode_item, generation, 64);
1599 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1600 struct btrfs_inode_item, sequence, 64);
1601 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1602 struct btrfs_inode_item, transid, 64);
1603 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1604 struct btrfs_inode_item, size, 64);
1605 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1606 struct btrfs_inode_item, nbytes, 64);
1607 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1608 struct btrfs_inode_item, block_group, 64);
1609 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1610 struct btrfs_inode_item, nlink, 32);
1611 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1612 struct btrfs_inode_item, uid, 32);
1613 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1614 struct btrfs_inode_item, gid, 32);
1615 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1616 struct btrfs_inode_item, mode, 32);
1617 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1618 struct btrfs_inode_item, rdev, 64);
1619 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1620 struct btrfs_inode_item, flags, 64);
1622 static inline struct btrfs_timespec *
1623 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1625 unsigned long ptr = (unsigned long)inode_item;
1626 ptr += offsetof(struct btrfs_inode_item, atime);
1627 return (struct btrfs_timespec *)ptr;
1630 static inline struct btrfs_timespec *
1631 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1633 unsigned long ptr = (unsigned long)inode_item;
1634 ptr += offsetof(struct btrfs_inode_item, mtime);
1635 return (struct btrfs_timespec *)ptr;
1638 static inline struct btrfs_timespec *
1639 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1641 unsigned long ptr = (unsigned long)inode_item;
1642 ptr += offsetof(struct btrfs_inode_item, ctime);
1643 return (struct btrfs_timespec *)ptr;
1646 static inline struct btrfs_timespec *
1647 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1649 unsigned long ptr = (unsigned long)inode_item;
1650 ptr += offsetof(struct btrfs_inode_item, otime);
1651 return (struct btrfs_timespec *)ptr;
1654 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1655 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1656 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1658 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1661 /* struct btrfs_dev_extent */
1662 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1664 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1665 chunk_objectid, 64);
1666 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1668 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1670 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1673 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1675 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1676 return (u8 *)((unsigned long)dev + ptr);
1680 /* struct btrfs_extent_item */
1681 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1682 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1683 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1685 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1686 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1688 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1690 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1692 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1693 struct btrfs_tree_block_info *item,
1694 struct btrfs_disk_key *key)
1696 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1699 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1700 struct btrfs_tree_block_info *item,
1701 struct btrfs_disk_key *key)
1703 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1706 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1708 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1710 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1712 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1715 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1718 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1720 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1722 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1723 struct btrfs_extent_inline_ref, type, 8);
1724 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1725 struct btrfs_extent_inline_ref, offset, 64);
1727 static inline u32 btrfs_extent_inline_ref_size(int type)
1729 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1730 type == BTRFS_SHARED_BLOCK_REF_KEY)
1731 return sizeof(struct btrfs_extent_inline_ref);
1732 if (type == BTRFS_SHARED_DATA_REF_KEY)
1733 return sizeof(struct btrfs_shared_data_ref) +
1734 sizeof(struct btrfs_extent_inline_ref);
1735 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1736 return sizeof(struct btrfs_extent_data_ref) +
1737 offsetof(struct btrfs_extent_inline_ref, offset);
1742 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1743 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1745 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1746 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1748 /* struct btrfs_node */
1749 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1750 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1752 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1755 ptr = offsetof(struct btrfs_node, ptrs) +
1756 sizeof(struct btrfs_key_ptr) * nr;
1757 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1760 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1764 ptr = offsetof(struct btrfs_node, ptrs) +
1765 sizeof(struct btrfs_key_ptr) * nr;
1766 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1769 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1772 ptr = offsetof(struct btrfs_node, ptrs) +
1773 sizeof(struct btrfs_key_ptr) * nr;
1774 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1777 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1781 ptr = offsetof(struct btrfs_node, ptrs) +
1782 sizeof(struct btrfs_key_ptr) * nr;
1783 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1786 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1788 return offsetof(struct btrfs_node, ptrs) +
1789 sizeof(struct btrfs_key_ptr) * nr;
1792 static inline void btrfs_node_key(struct extent_buffer *eb,
1793 struct btrfs_disk_key *disk_key, int nr)
1796 ptr = btrfs_node_key_ptr_offset(nr);
1797 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1798 struct btrfs_key_ptr, key, disk_key);
1801 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1802 struct btrfs_disk_key *disk_key, int nr)
1805 ptr = btrfs_node_key_ptr_offset(nr);
1806 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1807 struct btrfs_key_ptr, key, disk_key);
1810 /* struct btrfs_item */
1811 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1812 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1814 static inline unsigned long btrfs_item_nr_offset(int nr)
1816 return offsetof(struct btrfs_leaf, items) +
1817 sizeof(struct btrfs_item) * nr;
1820 static inline struct btrfs_item *btrfs_item_nr(int nr)
1822 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1825 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1826 struct btrfs_item *item)
1828 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1831 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1833 return btrfs_item_end(eb, btrfs_item_nr(nr));
1836 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1838 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1841 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1843 return btrfs_item_size(eb, btrfs_item_nr(nr));
1846 static inline void btrfs_item_key(struct extent_buffer *eb,
1847 struct btrfs_disk_key *disk_key, int nr)
1849 struct btrfs_item *item = btrfs_item_nr(nr);
1850 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1853 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1854 struct btrfs_disk_key *disk_key, int nr)
1856 struct btrfs_item *item = btrfs_item_nr(nr);
1857 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1860 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1863 * struct btrfs_root_ref
1865 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1866 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1867 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1869 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1870 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1871 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1873 /* struct btrfs_dir_item */
1874 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1875 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1876 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1877 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1879 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1880 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1881 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1882 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1884 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1885 struct btrfs_dir_item *item,
1886 struct btrfs_disk_key *key)
1888 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1891 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1892 struct btrfs_dir_item *item,
1893 struct btrfs_disk_key *key)
1895 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1898 /* struct btrfs_free_space_header */
1899 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1901 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1903 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1906 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1907 struct btrfs_free_space_header *h,
1908 struct btrfs_disk_key *key)
1910 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1913 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1914 struct btrfs_free_space_header *h,
1915 struct btrfs_disk_key *key)
1917 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1920 /* struct btrfs_disk_key */
1921 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1923 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1924 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1926 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1927 struct btrfs_disk_key *disk)
1929 cpu->offset = le64_to_cpu(disk->offset);
1930 cpu->type = disk->type;
1931 cpu->objectid = le64_to_cpu(disk->objectid);
1934 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1935 struct btrfs_key *cpu)
1937 disk->offset = cpu_to_le64(cpu->offset);
1938 disk->type = cpu->type;
1939 disk->objectid = cpu_to_le64(cpu->objectid);
1942 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1943 struct btrfs_key *key, int nr)
1945 struct btrfs_disk_key disk_key;
1946 btrfs_node_key(eb, &disk_key, nr);
1947 btrfs_disk_key_to_cpu(key, &disk_key);
1950 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1951 struct btrfs_key *key, int nr)
1953 struct btrfs_disk_key disk_key;
1954 btrfs_item_key(eb, &disk_key, nr);
1955 btrfs_disk_key_to_cpu(key, &disk_key);
1958 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1959 struct btrfs_dir_item *item,
1960 struct btrfs_key *key)
1962 struct btrfs_disk_key disk_key;
1963 btrfs_dir_item_key(eb, item, &disk_key);
1964 btrfs_disk_key_to_cpu(key, &disk_key);
1967 /* struct btrfs_header */
1968 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1969 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1971 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1972 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1973 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1974 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1975 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1976 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1978 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1979 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1982 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1984 return (btrfs_header_flags(eb) & flag) == flag;
1987 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1989 u64 flags = btrfs_header_flags(eb);
1990 btrfs_set_header_flags(eb, flags | flag);
1991 return (flags & flag) == flag;
1994 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1996 u64 flags = btrfs_header_flags(eb);
1997 btrfs_set_header_flags(eb, flags & ~flag);
1998 return (flags & flag) == flag;
2001 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2003 u64 flags = btrfs_header_flags(eb);
2004 return flags >> BTRFS_BACKREF_REV_SHIFT;
2007 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2010 u64 flags = btrfs_header_flags(eb);
2011 flags &= ~BTRFS_BACKREF_REV_MASK;
2012 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2013 btrfs_set_header_flags(eb, flags);
2016 static inline unsigned long btrfs_header_fsid(void)
2018 return offsetof(struct btrfs_header, fsid);
2021 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2023 return offsetof(struct btrfs_header, chunk_tree_uuid);
2026 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
2028 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
2032 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
2034 unsigned long ptr = offsetof(struct btrfs_header, csum);
2038 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
2043 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
2048 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
2053 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2055 return (btrfs_header_level(eb) == 0);
2058 /* struct btrfs_root_item */
2059 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2061 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2062 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2063 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2065 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2067 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2068 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2069 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2070 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2071 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2072 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2073 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2074 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2076 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2078 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2080 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2082 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2084 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2087 /* struct btrfs_root_backup */
2088 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2090 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2092 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2093 tree_root_level, 8);
2095 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2097 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2098 chunk_root_gen, 64);
2099 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2100 chunk_root_level, 8);
2102 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2104 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2105 extent_root_gen, 64);
2106 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2107 extent_root_level, 8);
2109 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2111 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2113 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2116 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2118 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2120 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2123 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2125 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2127 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2128 csum_root_level, 8);
2129 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2131 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2133 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2136 /* struct btrfs_super_block */
2138 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2139 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2140 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2142 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2143 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2144 struct btrfs_super_block, sys_chunk_array_size, 32);
2145 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2146 struct btrfs_super_block, chunk_root_generation, 64);
2147 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2149 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2151 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2152 chunk_root_level, 8);
2153 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2155 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2156 log_root_transid, 64);
2157 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2159 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2161 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2163 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2165 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2167 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2169 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2171 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2172 root_dir_objectid, 64);
2173 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2175 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2177 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2178 compat_ro_flags, 64);
2179 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2180 incompat_flags, 64);
2181 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2183 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2184 cache_generation, 64);
2185 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2186 uuid_tree_generation, 64);
2187 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2189 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2191 int t = btrfs_super_csum_type(s);
2192 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2193 return btrfs_csum_sizes[t];
2196 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2198 return offsetof(struct btrfs_leaf, items);
2201 /* struct btrfs_file_extent_item */
2202 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2203 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2205 static inline unsigned long btrfs_file_extent_inline_start(struct
2206 btrfs_file_extent_item *e)
2208 unsigned long offset = (unsigned long)e;
2209 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2213 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2215 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2218 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2220 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2222 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2224 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2226 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2227 disk_num_bytes, 64);
2228 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2230 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2232 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2234 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2236 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2238 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2240 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2242 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2244 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2246 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2247 other_encoding, 16);
2249 /* btrfs_qgroup_status_item */
2250 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2252 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2254 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2256 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2259 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2260 struct btrfs_qgroup_status_item, version, 64);
2261 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2262 struct btrfs_qgroup_status_item, generation, 64);
2263 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2264 struct btrfs_qgroup_status_item, flags, 64);
2265 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2266 struct btrfs_qgroup_status_item, rescan, 64);
2268 /* btrfs_qgroup_info_item */
2269 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2271 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2273 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2274 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2275 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2277 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2278 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2280 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2281 struct btrfs_qgroup_info_item, generation, 64);
2282 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2283 struct btrfs_qgroup_info_item, referenced, 64);
2284 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2285 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2286 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2287 struct btrfs_qgroup_info_item, exclusive, 64);
2288 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2289 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2291 /* btrfs_qgroup_limit_item */
2292 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2294 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2295 max_referenced, 64);
2296 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2298 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2299 rsv_referenced, 64);
2300 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2303 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2304 struct btrfs_qgroup_limit_item, flags, 64);
2305 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2306 struct btrfs_qgroup_limit_item, max_referenced, 64);
2307 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2308 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2309 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2310 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2311 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2312 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2314 /* btrfs_balance_item */
2315 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
2317 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
2318 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2320 unsigned long offset = (unsigned long)bi;
2321 struct btrfs_balance_item *p;
2322 p = (struct btrfs_balance_item *)(eb->data + offset);
2326 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
2327 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2329 unsigned long offset = (unsigned long)bi;
2330 struct btrfs_balance_item *p;
2331 p = (struct btrfs_balance_item *)(eb->data + offset);
2335 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
2336 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2338 unsigned long offset = (unsigned long)bi;
2339 struct btrfs_balance_item *p;
2340 p = (struct btrfs_balance_item *)(eb->data + offset);
2345 * btrfs_dev_stats_item helper, returns pointer to the raw array, do the
2346 * endiannes conversion, @dsi is offset to eb data
2348 static inline __le64* btrfs_dev_stats_values(struct extent_buffer *eb,
2349 struct btrfs_dev_stats_item *dsi)
2351 unsigned long offset = (unsigned long)dsi;
2352 struct btrfs_dev_stats_item *p;
2353 p = (struct btrfs_dev_stats_item *)(eb->data + offset);
2358 * this returns the number of bytes used by the item on disk, minus the
2359 * size of any extent headers. If a file is compressed on disk, this is
2360 * the compressed size
2362 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2363 struct btrfs_item *e)
2365 unsigned long offset;
2366 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2367 return btrfs_item_size(eb, e) - offset;
2370 /* struct btrfs_ioctl_search_header */
2371 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2373 return get_unaligned_64(&sh->transid);
2376 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2378 return get_unaligned_64(&sh->objectid);
2381 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2383 return get_unaligned_64(&sh->offset);
2386 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2388 return get_unaligned_32(&sh->type);
2391 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2393 return get_unaligned_32(&sh->len);
2396 /* this returns the number of file bytes represented by the inline item.
2397 * If an item is compressed, this is the uncompressed size
2399 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2401 struct btrfs_file_extent_item *fi)
2404 * return the space used on disk if this item isn't
2405 * compressed or encoded
2407 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2408 btrfs_file_extent_encryption(eb, fi) == 0 &&
2409 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2410 return btrfs_file_extent_inline_item_len(eb,
2411 btrfs_item_nr(slot));
2414 /* otherwise use the ram bytes field */
2415 return btrfs_file_extent_ram_bytes(eb, fi);
2419 * NOTE: Backward compatibility, do not use.
2420 * Replacement: read nodesize directly
2422 __attribute__((deprecated))
2423 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2425 return root->leafsize;
2426 return root->nodesize;
2429 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2431 struct btrfs_super_block *disk_super;
2432 disk_super = fs_info->super_copy;
2433 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2436 static inline int btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2438 struct btrfs_super_block *disk_super;
2439 disk_super = fs_info->super_copy;
2440 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2443 /* helper function to cast into the data area of the leaf. */
2444 #define btrfs_item_ptr(leaf, slot, type) \
2445 ((type *)(btrfs_leaf_data(leaf) + \
2446 btrfs_item_offset_nr(leaf, slot)))
2448 #define btrfs_item_ptr_offset(leaf, slot) \
2449 ((unsigned long)(btrfs_leaf_data(leaf) + \
2450 btrfs_item_offset_nr(leaf, slot)))
2453 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2454 struct btrfs_root *root,
2455 u64 num_bytes, u64 empty_size,
2456 u64 hint_byte, u64 search_end,
2457 struct btrfs_key *ins, int data);
2458 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2459 struct btrfs_root *root);
2460 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2461 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2462 u64 bytenr, u64 num_bytes);
2463 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2464 struct btrfs_root *root);
2465 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2466 btrfs_fs_info *info,
2468 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2469 btrfs_fs_info *info,
2471 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2472 struct btrfs_root *root,
2473 u32 blocksize, u64 root_objectid,
2474 struct btrfs_disk_key *key, int level,
2475 u64 hint, u64 empty_size);
2476 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2477 struct btrfs_root *root,
2478 u64 num_bytes, u64 parent,
2479 u64 root_objectid, u64 ref_generation,
2480 u64 owner, u64 empty_size, u64 hint_byte,
2481 u64 search_end, struct btrfs_key *ins, int data);
2482 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2483 struct btrfs_root *root, u64 bytenr,
2484 u64 offset, int metadata, u64 *refs, u64 *flags);
2485 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2486 struct btrfs_root *root,
2487 u64 bytenr, int level, u64 flags);
2488 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2489 struct extent_buffer *buf, int record_parent);
2490 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2491 struct extent_buffer *buf, int record_parent);
2492 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2493 struct btrfs_root *root,
2494 u64 bytenr, u64 num_bytes, u64 parent,
2495 u64 root_objectid, u64 owner, u64 offset);
2496 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2497 struct btrfs_root *root,
2498 struct extent_io_tree *unpin);
2499 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2500 struct btrfs_root *root,
2501 u64 bytenr, u64 num_bytes, u64 parent,
2502 u64 root_objectid, u64 ref_generation,
2503 u64 owner_objectid);
2504 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2505 struct btrfs_root *root, u64 bytenr,
2506 u64 orig_parent, u64 parent,
2507 u64 root_objectid, u64 ref_generation,
2508 u64 owner_objectid);
2509 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2510 struct btrfs_root *root);
2511 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2512 int btrfs_read_block_groups(struct btrfs_root *root);
2513 struct btrfs_block_group_cache *
2514 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2515 u64 chunk_objectid, u64 chunk_offset, u64 size);
2516 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2517 struct btrfs_root *root, u64 bytes_used,
2518 u64 type, u64 chunk_objectid, u64 chunk_offset,
2520 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2521 struct btrfs_root *root);
2522 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2523 struct btrfs_root *root, u64 bytenr, u64 num,
2524 int alloc, int mark_free);
2525 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2526 struct btrfs_root *root, u64 objectid,
2527 struct btrfs_inode_item *inode,
2528 u64 file_pos, u64 disk_bytenr,
2530 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2531 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2532 void free_excluded_extents(struct btrfs_root *root,
2533 struct btrfs_block_group_cache *cache);
2534 int exclude_super_stripes(struct btrfs_root *root,
2535 struct btrfs_block_group_cache *cache);
2536 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2537 struct btrfs_fs_info *info, u64 start, u64 end);
2538 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2541 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2542 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2543 struct btrfs_path *path, int level, int slot);
2544 enum btrfs_tree_block_status
2545 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2546 struct extent_buffer *buf);
2547 enum btrfs_tree_block_status
2548 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2549 struct extent_buffer *buf);
2550 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2551 int level, int slot, u64 objectid);
2552 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2553 struct extent_buffer *parent, int slot);
2554 int btrfs_previous_item(struct btrfs_root *root,
2555 struct btrfs_path *path, u64 min_objectid,
2557 int btrfs_previous_extent_item(struct btrfs_root *root,
2558 struct btrfs_path *path, u64 min_objectid);
2559 int btrfs_next_extent_item(struct btrfs_root *root,
2560 struct btrfs_path *path, u64 max_objectid);
2561 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2562 struct btrfs_root *root, struct extent_buffer *buf,
2563 struct extent_buffer *parent, int parent_slot,
2564 struct extent_buffer **cow_ret);
2565 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2566 struct btrfs_root *root,
2567 struct extent_buffer *buf,
2568 struct extent_buffer *parent, int parent_slot,
2569 struct extent_buffer **cow_ret,
2570 u64 search_start, u64 empty_size);
2571 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2572 struct btrfs_root *root,
2573 struct extent_buffer *buf,
2574 struct extent_buffer **cow_ret, u64 new_root_objectid);
2575 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2576 *root, struct btrfs_path *path, u32 data_size);
2577 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2578 struct btrfs_root *root,
2579 struct btrfs_path *path,
2580 u32 new_size, int from_end);
2581 int btrfs_split_item(struct btrfs_trans_handle *trans,
2582 struct btrfs_root *root,
2583 struct btrfs_path *path,
2584 struct btrfs_key *new_key,
2585 unsigned long split_offset);
2586 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2587 *root, struct btrfs_key *key, struct btrfs_path *p, int
2589 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2590 u64 iobjectid, u64 ioff, u8 key_type,
2591 struct btrfs_key *found_key);
2592 void btrfs_release_path(struct btrfs_path *p);
2593 void add_root_to_dirty_list(struct btrfs_root *root);
2594 struct btrfs_path *btrfs_alloc_path(void);
2595 void btrfs_free_path(struct btrfs_path *p);
2596 void btrfs_init_path(struct btrfs_path *p);
2597 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2598 struct btrfs_path *path, int slot, int nr);
2600 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2601 struct btrfs_root *root,
2602 struct btrfs_path *path)
2604 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2607 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2608 *root, struct btrfs_key *key, void *data, u32 data_size);
2609 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2610 struct btrfs_root *root,
2611 struct btrfs_path *path,
2612 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2614 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2615 struct btrfs_root *root,
2616 struct btrfs_path *path,
2617 struct btrfs_key *key,
2620 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2623 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2624 static inline int btrfs_next_item(struct btrfs_root *root,
2625 struct btrfs_path *p)
2628 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2629 return btrfs_next_leaf(root, p);
2633 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2634 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2635 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2636 struct btrfs_disk_key *key, int level);
2637 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2638 struct btrfs_key *new_key);
2639 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2640 struct btrfs_path *path,
2641 struct btrfs_key *new_key);
2644 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2645 struct btrfs_root *tree_root,
2646 u64 root_id, u8 type, u64 ref_id,
2647 u64 dirid, u64 sequence,
2648 const char *name, int name_len);
2649 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2650 *root, struct btrfs_key *key, struct btrfs_root_item
2652 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2653 *root, struct btrfs_key *key, struct btrfs_root_item
2655 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2656 btrfs_root_item *item, struct btrfs_key *key);
2658 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2659 *root, const char *name, int name_len, u64 dir,
2660 struct btrfs_key *location, u8 type, u64 index);
2661 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2662 struct btrfs_root *root,
2663 struct btrfs_path *path, u64 dir,
2664 const char *name, int name_len,
2666 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2667 struct btrfs_root *root,
2668 struct btrfs_path *path, u64 dir,
2669 const char *name, int name_len,
2670 u64 index, int mod);
2671 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2672 struct btrfs_root *root,
2673 struct btrfs_path *path,
2674 struct btrfs_dir_item *di);
2675 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2676 struct btrfs_root *root, const char *name,
2677 u16 name_len, const void *data, u16 data_len,
2680 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2681 struct btrfs_root *fs_root,
2682 u64 dirid, u64 *objectid);
2685 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2686 struct btrfs_root *root,
2687 const char *name, int name_len,
2688 u64 inode_objectid, u64 ref_objectid, u64 index);
2689 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2690 *root, u64 objectid, struct btrfs_inode_item
2692 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2693 *root, struct btrfs_path *path,
2694 struct btrfs_key *location, int mod);
2695 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2696 *trans, struct btrfs_path *path, struct btrfs_root *root,
2697 u64 ino, u64 parent_ino, u64 index, const char *name,
2698 int namelen, int ins_len);
2699 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2700 struct btrfs_root *root,
2701 const char *name, int name_len,
2702 u64 inode_objectid, u64 ref_objectid,
2704 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2705 struct btrfs_root *root,
2706 const char *name, int name_len,
2707 u64 inode_objectid, u64 ref_objectid, u64 index);
2708 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2709 struct btrfs_root *root, struct btrfs_path *path,
2710 const char *name, int namelen, u64 ino, u64 parent_ino,
2711 u64 index, int ins_len);
2712 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2713 struct btrfs_root *root, const char *name, int name_len,
2714 u64 ino, u64 parent_ino, u64 *index);
2717 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2718 struct btrfs_root *root, u64 bytenr, u64 len);
2719 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2720 struct btrfs_root *root,
2721 u64 objectid, u64 pos, u64 offset,
2724 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2725 struct btrfs_root *root, u64 objectid,
2726 u64 offset, char *buffer, size_t size);
2727 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2728 struct btrfs_root *root, u64 alloc_end,
2729 u64 bytenr, char *data, size_t len);
2730 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2731 struct btrfs_root *root, struct btrfs_path *path,
2735 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2736 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2739 static inline int is_fstree(u64 rootid)
2741 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2742 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2748 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2749 u64 dir, u64 index);
2750 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2752 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2753 struct btrfs_root *root, u64 ino, u64 flags);
2754 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2755 u64 ino, u64 parent_ino, char *name, int namelen,
2756 u8 type, u64 *index, int add_backref);
2757 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2758 u64 ino, u64 parent_ino, u64 index, const char *name,
2759 int namelen, int add_orphan);
2760 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2761 struct btrfs_root *root, struct btrfs_path *path,
2763 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2764 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2767 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2768 struct btrfs_root *root,
2769 struct btrfs_path *path,
2770 u64 ino, u64 offset, u64 len, int ins_len);
2771 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2772 struct btrfs_root *root,
2773 u64 ino, u64 offset, u64 len);