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 #define BTRFS_FILE_EXTENT_INLINE 0
792 #define BTRFS_FILE_EXTENT_REG 1
793 #define BTRFS_FILE_EXTENT_PREALLOC 2
795 struct btrfs_file_extent_item {
797 * transaction id that created this extent
801 * max number of bytes to hold this extent in ram
802 * when we split a compressed extent we can't know how big
803 * each of the resulting pieces will be. So, this is
804 * an upper limit on the size of the extent in ram instead of
810 * 32 bits for the various ways we might encode the data,
811 * including compression and encryption. If any of these
812 * are set to something a given disk format doesn't understand
813 * it is treated like an incompat flag for reading and writing,
818 __le16 other_encoding; /* spare for later use */
820 /* are we inline data or a real extent? */
824 * disk space consumed by the extent, checksum blocks are included
828 __le64 disk_num_bytes;
830 * the logical offset in file blocks (no csums)
831 * this extent record is for. This allows a file extent to point
832 * into the middle of an existing extent on disk, sharing it
833 * between two snapshots (useful if some bytes in the middle of the
834 * extent have changed
838 * the logical number of file blocks (no csums included)
842 } __attribute__ ((__packed__));
844 struct btrfs_csum_item {
846 } __attribute__ ((__packed__));
849 * We don't want to overwrite 1M at the beginning of device, even though
850 * there is our 1st superblock at 64k. Some possible reasons:
851 * - the first 64k blank is useful for some boot loader/manager
852 * - the first 1M could be scratched by buggy partitioner or somesuch
854 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
856 /* tag for the radix tree of block groups in ram */
857 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
858 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
859 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
860 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
861 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
862 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
863 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
864 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
865 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
866 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
867 #define BTRFS_NR_RAID_TYPES 7
869 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
870 BTRFS_BLOCK_GROUP_SYSTEM | \
871 BTRFS_BLOCK_GROUP_METADATA)
873 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
874 BTRFS_BLOCK_GROUP_RAID1 | \
875 BTRFS_BLOCK_GROUP_RAID5 | \
876 BTRFS_BLOCK_GROUP_RAID6 | \
877 BTRFS_BLOCK_GROUP_DUP | \
878 BTRFS_BLOCK_GROUP_RAID10)
880 /* used in struct btrfs_balance_args fields */
881 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
884 * GLOBAL_RSV does not exist as a on-disk block group type and is used
885 * internally for exporting info about global block reserve from space infos
887 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
889 #define BTRFS_QGROUP_LEVEL_SHIFT 48
891 static inline u64 btrfs_qgroup_level(u64 qgroupid)
893 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
896 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
898 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
901 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
902 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
903 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
905 struct btrfs_qgroup_status_item {
909 __le64 rescan; /* progress during scanning */
910 } __attribute__ ((__packed__));
912 struct btrfs_block_group_item {
914 __le64 chunk_objectid;
916 } __attribute__ ((__packed__));
918 struct btrfs_free_space_info {
921 } __attribute__ ((__packed__));
923 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
925 struct btrfs_qgroup_info_item {
928 __le64 referenced_compressed;
930 __le64 exclusive_compressed;
931 } __attribute__ ((__packed__));
933 /* flags definition for qgroup limits */
934 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
935 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
936 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
937 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
938 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
939 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
941 struct btrfs_qgroup_limit_item {
943 __le64 max_referenced;
944 __le64 max_exclusive;
945 __le64 rsv_referenced;
946 __le64 rsv_exclusive;
947 } __attribute__ ((__packed__));
949 struct btrfs_space_info {
955 struct list_head list;
958 struct btrfs_block_group_cache {
959 struct cache_extent cache;
960 struct btrfs_key key;
961 struct btrfs_block_group_item item;
962 struct btrfs_space_info *space_info;
963 struct btrfs_free_space_ctl *free_space_ctl;
972 struct btrfs_fs_devices;
973 struct btrfs_fs_info {
974 u8 fsid[BTRFS_FSID_SIZE];
976 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
977 u8 *new_chunk_tree_uuid;
978 struct btrfs_root *fs_root;
979 struct btrfs_root *extent_root;
980 struct btrfs_root *tree_root;
981 struct btrfs_root *chunk_root;
982 struct btrfs_root *dev_root;
983 struct btrfs_root *csum_root;
984 struct btrfs_root *quota_root;
985 struct btrfs_root *free_space_root;
987 struct rb_root fs_root_tree;
989 /* the log root tree is a directory of all the other log roots */
990 struct btrfs_root *log_root_tree;
992 struct extent_io_tree extent_cache;
993 struct extent_io_tree free_space_cache;
994 struct extent_io_tree block_group_cache;
995 struct extent_io_tree pinned_extents;
996 struct extent_io_tree pending_del;
997 struct extent_io_tree extent_ins;
998 struct extent_io_tree *excluded_extents;
1000 /* logical->physical extent mapping */
1001 struct btrfs_mapping_tree mapping_tree;
1004 u64 last_trans_committed;
1006 u64 avail_data_alloc_bits;
1007 u64 avail_metadata_alloc_bits;
1008 u64 avail_system_alloc_bits;
1009 u64 data_alloc_profile;
1010 u64 metadata_alloc_profile;
1011 u64 system_alloc_profile;
1014 struct btrfs_trans_handle *running_transaction;
1015 struct btrfs_super_block *super_copy;
1016 struct mutex fs_mutex;
1021 struct list_head dirty_cowonly_roots;
1022 struct list_head recow_ebs;
1024 struct btrfs_fs_devices *fs_devices;
1025 struct list_head space_info;
1028 unsigned int readonly:1;
1029 unsigned int on_restoring:1;
1030 unsigned int is_chunk_recover:1;
1031 unsigned int quota_enabled:1;
1032 unsigned int suppress_check_block_errors:1;
1033 unsigned int ignore_fsid_mismatch:1;
1034 unsigned int ignore_chunk_tree_error:1;
1035 unsigned int avoid_meta_chunk_alloc:1;
1036 unsigned int avoid_sys_chunk_alloc:1;
1037 unsigned int finalize_on_close:1;
1039 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1040 struct btrfs_root *root,
1041 u64 bytenr, u64 num_bytes, u64 parent,
1042 u64 root_objectid, u64 owner, u64 offset,
1044 struct cache_tree *fsck_extent_cache;
1045 struct cache_tree *corrupt_blocks;
1050 * in ram representation of the tree. extent_root is used for all allocations
1051 * and for the extent tree extent_root root.
1054 struct extent_buffer *node;
1055 struct extent_buffer *commit_root;
1056 struct btrfs_root_item root_item;
1057 struct btrfs_key root_key;
1058 struct btrfs_fs_info *fs_info;
1062 /* data allocations are done in sectorsize units */
1065 /* node allocations are done in nodesize units */
1068 /* Unused, equal to nodesize */
1071 /* leaf allocations are done in nodesize units */
1080 u64 last_inode_alloc;
1083 * Record orphan data extent ref
1085 * TODO: Don't restore things in btrfs_root.
1086 * Directly record it into inode_record, which needs a lot of
1087 * infrastructure change to allow cooperation between extent
1090 struct list_head orphan_data_extents;
1092 /* the dirty list is only used by non-reference counted roots */
1093 struct list_head dirty_list;
1094 struct rb_node rb_node;
1098 * inode items have the data typically returned from stat and store other
1099 * info about object characteristics. There is one for every file and dir in
1102 #define BTRFS_INODE_ITEM_KEY 1
1103 #define BTRFS_INODE_REF_KEY 12
1104 #define BTRFS_INODE_EXTREF_KEY 13
1105 #define BTRFS_XATTR_ITEM_KEY 24
1106 #define BTRFS_ORPHAN_ITEM_KEY 48
1108 #define BTRFS_DIR_LOG_ITEM_KEY 60
1109 #define BTRFS_DIR_LOG_INDEX_KEY 72
1111 * dir items are the name -> inode pointers in a directory. There is one
1112 * for every name in a directory.
1114 #define BTRFS_DIR_ITEM_KEY 84
1115 #define BTRFS_DIR_INDEX_KEY 96
1118 * extent data is for file data
1120 #define BTRFS_EXTENT_DATA_KEY 108
1123 * csum items have the checksums for data in the extents
1125 #define BTRFS_CSUM_ITEM_KEY 120
1127 * extent csums are stored in a separate tree and hold csums for
1128 * an entire extent on disk.
1130 #define BTRFS_EXTENT_CSUM_KEY 128
1133 * root items point to tree roots. There are typically in the root
1134 * tree used by the super block to find all the other trees
1136 #define BTRFS_ROOT_ITEM_KEY 132
1139 * root backrefs tie subvols and snapshots to the directory entries that
1142 #define BTRFS_ROOT_BACKREF_KEY 144
1145 * root refs make a fast index for listing all of the snapshots and
1146 * subvolumes referenced by a given root. They point directly to the
1147 * directory item in the root that references the subvol
1149 #define BTRFS_ROOT_REF_KEY 156
1152 * extent items are in the extent map tree. These record which blocks
1153 * are used, and how many references there are to each block
1155 #define BTRFS_EXTENT_ITEM_KEY 168
1158 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1159 * the length, so we save the level in key->offset instead of the length.
1161 #define BTRFS_METADATA_ITEM_KEY 169
1163 #define BTRFS_TREE_BLOCK_REF_KEY 176
1165 #define BTRFS_EXTENT_DATA_REF_KEY 178
1167 /* old style extent backrefs */
1168 #define BTRFS_EXTENT_REF_V0_KEY 180
1170 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1172 #define BTRFS_SHARED_DATA_REF_KEY 184
1176 * block groups give us hints into the extent allocation trees. Which
1177 * blocks are free etc etc
1179 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1182 * Every block group is represented in the free space tree by a free space info
1183 * item, which stores some accounting information. It is keyed on
1184 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1186 #define BTRFS_FREE_SPACE_INFO_KEY 198
1189 * A free space extent tracks an extent of space that is free in a block group.
1190 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1192 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1195 * When a block group becomes very fragmented, we convert it to use bitmaps
1196 * instead of extents. A free space bitmap is keyed on
1197 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1198 * (length / sectorsize) bits.
1200 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1202 #define BTRFS_DEV_EXTENT_KEY 204
1203 #define BTRFS_DEV_ITEM_KEY 216
1204 #define BTRFS_CHUNK_ITEM_KEY 228
1206 #define BTRFS_BALANCE_ITEM_KEY 248
1211 #define BTRFS_QGROUP_STATUS_KEY 240
1212 #define BTRFS_QGROUP_INFO_KEY 242
1213 #define BTRFS_QGROUP_LIMIT_KEY 244
1214 #define BTRFS_QGROUP_RELATION_KEY 246
1217 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1219 #define BTRFS_BALANCE_ITEM_KEY 248
1222 * The key type for tree items that are stored persistently, but do not need to
1223 * exist for extended period of time. The items can exist in any tree.
1225 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1229 * - balance status item
1230 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1232 #define BTRFS_TEMPORARY_ITEM_KEY 248
1235 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1237 #define BTRFS_DEV_STATS_KEY 249
1240 * The key type for tree items that are stored persistently and usually exist
1241 * for a long period, eg. filesystem lifetime. The item kinds can be status
1242 * information, stats or preference values. The item can exist in any tree.
1244 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1248 * - device statistics, store IO stats in the device tree, one key for all
1250 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1252 #define BTRFS_PERSISTENT_ITEM_KEY 249
1255 * Persistently stores the device replace state in the device tree.
1256 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1258 #define BTRFS_DEV_REPLACE_KEY 250
1261 * Stores items that allow to quickly map UUIDs to something else.
1262 * These items are part of the filesystem UUID tree.
1263 * The key is built like this:
1264 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1266 #if BTRFS_UUID_SIZE != 16
1267 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1269 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1270 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1271 * received subvols */
1274 * string items are for debugging. They just store a short string of
1277 #define BTRFS_STRING_ITEM_KEY 253
1281 #define BTRFS_INODE_NODATASUM (1 << 0)
1282 #define BTRFS_INODE_NODATACOW (1 << 1)
1283 #define BTRFS_INODE_READONLY (1 << 2)
1284 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1285 #define BTRFS_INODE_PREALLOC (1 << 4)
1286 #define BTRFS_INODE_SYNC (1 << 5)
1287 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1288 #define BTRFS_INODE_APPEND (1 << 7)
1289 #define BTRFS_INODE_NODUMP (1 << 8)
1290 #define BTRFS_INODE_NOATIME (1 << 9)
1291 #define BTRFS_INODE_DIRSYNC (1 << 10)
1292 #define BTRFS_INODE_COMPRESS (1 << 11)
1294 #define read_eb_member(eb, ptr, type, member, result) ( \
1295 read_extent_buffer(eb, (char *)(result), \
1296 ((unsigned long)(ptr)) + \
1297 offsetof(type, member), \
1298 sizeof(((type *)0)->member)))
1300 #define write_eb_member(eb, ptr, type, member, result) ( \
1301 write_extent_buffer(eb, (char *)(result), \
1302 ((unsigned long)(ptr)) + \
1303 offsetof(type, member), \
1304 sizeof(((type *)0)->member)))
1306 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1307 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1309 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1310 return le##bits##_to_cpu(h->member); \
1312 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1315 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1316 h->member = cpu_to_le##bits(val); \
1319 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1320 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1323 unsigned long offset = (unsigned long)s; \
1324 const type *p = (type *) (eb->data + offset); \
1325 return get_unaligned_le##bits(&p->member); \
1327 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1328 type *s, u##bits val) \
1330 unsigned long offset = (unsigned long)s; \
1331 type *p = (type *) (eb->data + offset); \
1332 put_unaligned_le##bits(val, &p->member); \
1335 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1336 static inline u##bits btrfs_##name(const type *s) \
1338 return le##bits##_to_cpu(s->member); \
1340 static inline void btrfs_set_##name(type *s, u##bits val) \
1342 s->member = cpu_to_le##bits(val); \
1345 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1346 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1347 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1348 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1349 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1350 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1352 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1353 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1354 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1355 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1356 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1357 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1359 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1360 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1362 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1364 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1366 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1368 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1370 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1371 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1373 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1375 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1377 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1380 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1382 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1385 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1387 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1390 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1391 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1392 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1393 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1394 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1395 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1396 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1397 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1398 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1399 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1400 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1402 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1404 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1407 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1408 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1409 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1411 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1413 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1415 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1417 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1418 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1420 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1422 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1423 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1425 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1428 unsigned long offset = (unsigned long)c;
1429 offset += offsetof(struct btrfs_chunk, stripe);
1430 offset += nr * sizeof(struct btrfs_stripe);
1431 return (struct btrfs_stripe *)offset;
1434 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1436 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1439 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1440 struct btrfs_chunk *c, int nr)
1442 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1445 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1446 struct btrfs_chunk *c, int nr,
1449 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1452 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1453 struct btrfs_chunk *c, int nr)
1455 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1458 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1459 struct btrfs_chunk *c, int nr,
1462 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1465 /* struct btrfs_block_group_item */
1466 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1468 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1470 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1471 struct btrfs_block_group_item, chunk_objectid, 64);
1473 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1474 struct btrfs_block_group_item, chunk_objectid, 64);
1475 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1476 struct btrfs_block_group_item, flags, 64);
1477 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1478 struct btrfs_block_group_item, flags, 64);
1480 /* struct btrfs_free_space_info */
1481 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1483 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1485 /* struct btrfs_inode_ref */
1486 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1487 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1488 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1490 /* struct btrfs_inode_extref */
1491 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1492 parent_objectid, 64);
1493 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1495 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1497 /* struct btrfs_inode_item */
1498 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1499 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1500 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1501 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1502 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1503 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1504 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1505 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1506 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1507 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1508 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1509 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1511 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1512 struct btrfs_inode_item, generation, 64);
1513 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1514 struct btrfs_inode_item, sequence, 64);
1515 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1516 struct btrfs_inode_item, transid, 64);
1517 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1518 struct btrfs_inode_item, size, 64);
1519 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1520 struct btrfs_inode_item, nbytes, 64);
1521 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1522 struct btrfs_inode_item, block_group, 64);
1523 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1524 struct btrfs_inode_item, nlink, 32);
1525 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1526 struct btrfs_inode_item, uid, 32);
1527 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1528 struct btrfs_inode_item, gid, 32);
1529 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1530 struct btrfs_inode_item, mode, 32);
1531 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1532 struct btrfs_inode_item, rdev, 64);
1533 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1534 struct btrfs_inode_item, flags, 64);
1536 static inline struct btrfs_timespec *
1537 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1539 unsigned long ptr = (unsigned long)inode_item;
1540 ptr += offsetof(struct btrfs_inode_item, atime);
1541 return (struct btrfs_timespec *)ptr;
1544 static inline struct btrfs_timespec *
1545 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1547 unsigned long ptr = (unsigned long)inode_item;
1548 ptr += offsetof(struct btrfs_inode_item, mtime);
1549 return (struct btrfs_timespec *)ptr;
1552 static inline struct btrfs_timespec *
1553 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1555 unsigned long ptr = (unsigned long)inode_item;
1556 ptr += offsetof(struct btrfs_inode_item, ctime);
1557 return (struct btrfs_timespec *)ptr;
1560 static inline struct btrfs_timespec *
1561 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1563 unsigned long ptr = (unsigned long)inode_item;
1564 ptr += offsetof(struct btrfs_inode_item, otime);
1565 return (struct btrfs_timespec *)ptr;
1568 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1569 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1570 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1572 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1575 /* struct btrfs_dev_extent */
1576 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1578 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1579 chunk_objectid, 64);
1580 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1582 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1584 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1587 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1589 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1590 return (u8 *)((unsigned long)dev + ptr);
1594 /* struct btrfs_extent_item */
1595 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1596 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1597 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1599 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1600 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1602 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1604 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1606 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1607 struct btrfs_tree_block_info *item,
1608 struct btrfs_disk_key *key)
1610 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1613 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1614 struct btrfs_tree_block_info *item,
1615 struct btrfs_disk_key *key)
1617 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1620 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1622 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1624 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1626 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1629 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1632 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1634 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1636 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1637 struct btrfs_extent_inline_ref, type, 8);
1638 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1639 struct btrfs_extent_inline_ref, offset, 64);
1641 static inline u32 btrfs_extent_inline_ref_size(int type)
1643 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1644 type == BTRFS_SHARED_BLOCK_REF_KEY)
1645 return sizeof(struct btrfs_extent_inline_ref);
1646 if (type == BTRFS_SHARED_DATA_REF_KEY)
1647 return sizeof(struct btrfs_shared_data_ref) +
1648 sizeof(struct btrfs_extent_inline_ref);
1649 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1650 return sizeof(struct btrfs_extent_data_ref) +
1651 offsetof(struct btrfs_extent_inline_ref, offset);
1656 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1657 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1659 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1660 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1662 /* struct btrfs_node */
1663 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1664 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1666 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1669 ptr = offsetof(struct btrfs_node, ptrs) +
1670 sizeof(struct btrfs_key_ptr) * nr;
1671 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1674 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1678 ptr = offsetof(struct btrfs_node, ptrs) +
1679 sizeof(struct btrfs_key_ptr) * nr;
1680 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1683 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1686 ptr = offsetof(struct btrfs_node, ptrs) +
1687 sizeof(struct btrfs_key_ptr) * nr;
1688 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1691 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1695 ptr = offsetof(struct btrfs_node, ptrs) +
1696 sizeof(struct btrfs_key_ptr) * nr;
1697 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1700 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1702 return offsetof(struct btrfs_node, ptrs) +
1703 sizeof(struct btrfs_key_ptr) * nr;
1706 static inline void btrfs_node_key(struct extent_buffer *eb,
1707 struct btrfs_disk_key *disk_key, int nr)
1710 ptr = btrfs_node_key_ptr_offset(nr);
1711 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1712 struct btrfs_key_ptr, key, disk_key);
1715 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1716 struct btrfs_disk_key *disk_key, int nr)
1719 ptr = btrfs_node_key_ptr_offset(nr);
1720 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1721 struct btrfs_key_ptr, key, disk_key);
1724 /* struct btrfs_item */
1725 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1726 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1728 static inline unsigned long btrfs_item_nr_offset(int nr)
1730 return offsetof(struct btrfs_leaf, items) +
1731 sizeof(struct btrfs_item) * nr;
1734 static inline struct btrfs_item *btrfs_item_nr(int nr)
1736 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1739 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1740 struct btrfs_item *item)
1742 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1745 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1747 return btrfs_item_end(eb, btrfs_item_nr(nr));
1750 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1752 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1755 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1757 return btrfs_item_size(eb, btrfs_item_nr(nr));
1760 static inline void btrfs_item_key(struct extent_buffer *eb,
1761 struct btrfs_disk_key *disk_key, int nr)
1763 struct btrfs_item *item = btrfs_item_nr(nr);
1764 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1767 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1768 struct btrfs_disk_key *disk_key, int nr)
1770 struct btrfs_item *item = btrfs_item_nr(nr);
1771 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1774 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1777 * struct btrfs_root_ref
1779 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1780 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1781 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1783 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1784 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1785 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1787 /* struct btrfs_dir_item */
1788 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1789 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1790 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1791 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1793 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1794 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1795 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1796 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1798 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1799 struct btrfs_dir_item *item,
1800 struct btrfs_disk_key *key)
1802 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1805 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1806 struct btrfs_dir_item *item,
1807 struct btrfs_disk_key *key)
1809 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1812 /* struct btrfs_free_space_header */
1813 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1815 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1817 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1820 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1821 struct btrfs_free_space_header *h,
1822 struct btrfs_disk_key *key)
1824 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1827 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1828 struct btrfs_free_space_header *h,
1829 struct btrfs_disk_key *key)
1831 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1834 /* struct btrfs_disk_key */
1835 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1837 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1838 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1840 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1841 struct btrfs_disk_key *disk)
1843 cpu->offset = le64_to_cpu(disk->offset);
1844 cpu->type = disk->type;
1845 cpu->objectid = le64_to_cpu(disk->objectid);
1848 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1849 struct btrfs_key *cpu)
1851 disk->offset = cpu_to_le64(cpu->offset);
1852 disk->type = cpu->type;
1853 disk->objectid = cpu_to_le64(cpu->objectid);
1856 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1857 struct btrfs_key *key, int nr)
1859 struct btrfs_disk_key disk_key;
1860 btrfs_node_key(eb, &disk_key, nr);
1861 btrfs_disk_key_to_cpu(key, &disk_key);
1864 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1865 struct btrfs_key *key, int nr)
1867 struct btrfs_disk_key disk_key;
1868 btrfs_item_key(eb, &disk_key, nr);
1869 btrfs_disk_key_to_cpu(key, &disk_key);
1872 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1873 struct btrfs_dir_item *item,
1874 struct btrfs_key *key)
1876 struct btrfs_disk_key disk_key;
1877 btrfs_dir_item_key(eb, item, &disk_key);
1878 btrfs_disk_key_to_cpu(key, &disk_key);
1881 /* struct btrfs_header */
1882 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1883 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1885 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1886 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1887 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1888 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1889 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1890 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1892 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1893 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1896 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1898 return (btrfs_header_flags(eb) & flag) == flag;
1901 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1903 u64 flags = btrfs_header_flags(eb);
1904 btrfs_set_header_flags(eb, flags | flag);
1905 return (flags & flag) == flag;
1908 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1910 u64 flags = btrfs_header_flags(eb);
1911 btrfs_set_header_flags(eb, flags & ~flag);
1912 return (flags & flag) == flag;
1915 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1917 u64 flags = btrfs_header_flags(eb);
1918 return flags >> BTRFS_BACKREF_REV_SHIFT;
1921 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1924 u64 flags = btrfs_header_flags(eb);
1925 flags &= ~BTRFS_BACKREF_REV_MASK;
1926 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1927 btrfs_set_header_flags(eb, flags);
1930 static inline unsigned long btrfs_header_fsid(void)
1932 return offsetof(struct btrfs_header, fsid);
1935 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1937 return offsetof(struct btrfs_header, chunk_tree_uuid);
1940 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1942 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1946 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1948 unsigned long ptr = offsetof(struct btrfs_header, csum);
1952 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1957 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1962 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1967 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1969 return (btrfs_header_level(eb) == 0);
1972 /* struct btrfs_root_item */
1973 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1975 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1976 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1977 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1979 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1981 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1982 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1983 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1984 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1985 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1986 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1987 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1988 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1990 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1992 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1994 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1996 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1998 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2001 /* struct btrfs_root_backup */
2002 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2004 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2006 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2007 tree_root_level, 8);
2009 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2011 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2012 chunk_root_gen, 64);
2013 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2014 chunk_root_level, 8);
2016 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2018 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2019 extent_root_gen, 64);
2020 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2021 extent_root_level, 8);
2023 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2025 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2027 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2030 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2032 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2034 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2037 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2039 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2041 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2042 csum_root_level, 8);
2043 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2045 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2047 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2050 /* struct btrfs_super_block */
2052 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2053 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2054 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2056 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2057 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2058 struct btrfs_super_block, sys_chunk_array_size, 32);
2059 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2060 struct btrfs_super_block, chunk_root_generation, 64);
2061 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2063 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2065 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2066 chunk_root_level, 8);
2067 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2069 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2070 log_root_transid, 64);
2071 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2073 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2075 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2077 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2079 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2081 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2083 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2085 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2086 root_dir_objectid, 64);
2087 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2089 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2091 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2092 compat_ro_flags, 64);
2093 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2094 incompat_flags, 64);
2095 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2097 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2098 cache_generation, 64);
2099 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2100 uuid_tree_generation, 64);
2101 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2103 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2105 int t = btrfs_super_csum_type(s);
2106 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2107 return btrfs_csum_sizes[t];
2110 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2112 return offsetof(struct btrfs_leaf, items);
2115 /* struct btrfs_file_extent_item */
2116 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2117 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2119 static inline unsigned long btrfs_file_extent_inline_start(struct
2120 btrfs_file_extent_item *e)
2122 unsigned long offset = (unsigned long)e;
2123 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2127 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2129 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2132 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2134 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2136 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2138 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2140 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2141 disk_num_bytes, 64);
2142 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2144 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2146 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2148 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2150 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2152 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2154 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2156 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2158 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2160 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2161 other_encoding, 16);
2163 /* btrfs_qgroup_status_item */
2164 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2166 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2168 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2170 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2173 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2174 struct btrfs_qgroup_status_item, version, 64);
2175 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2176 struct btrfs_qgroup_status_item, generation, 64);
2177 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2178 struct btrfs_qgroup_status_item, flags, 64);
2179 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2180 struct btrfs_qgroup_status_item, rescan, 64);
2182 /* btrfs_qgroup_info_item */
2183 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2185 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2187 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2188 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2189 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2191 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2192 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2194 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2195 struct btrfs_qgroup_info_item, generation, 64);
2196 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2197 struct btrfs_qgroup_info_item, referenced, 64);
2198 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2199 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2200 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2201 struct btrfs_qgroup_info_item, exclusive, 64);
2202 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2203 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2205 /* btrfs_qgroup_limit_item */
2206 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2208 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2209 max_referenced, 64);
2210 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2212 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2213 rsv_referenced, 64);
2214 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2217 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2218 struct btrfs_qgroup_limit_item, flags, 64);
2219 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2220 struct btrfs_qgroup_limit_item, max_referenced, 64);
2221 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2222 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2223 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2224 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2225 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2226 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2229 * this returns the number of bytes used by the item on disk, minus the
2230 * size of any extent headers. If a file is compressed on disk, this is
2231 * the compressed size
2233 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2234 struct btrfs_item *e)
2236 unsigned long offset;
2237 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2238 return btrfs_item_size(eb, e) - offset;
2241 /* struct btrfs_ioctl_search_header */
2242 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2244 return get_unaligned_64(&sh->transid);
2247 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2249 return get_unaligned_64(&sh->objectid);
2252 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2254 return get_unaligned_64(&sh->offset);
2257 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2259 return get_unaligned_32(&sh->type);
2262 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2264 return get_unaligned_32(&sh->len);
2267 /* this returns the number of file bytes represented by the inline item.
2268 * If an item is compressed, this is the uncompressed size
2270 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2272 struct btrfs_file_extent_item *fi)
2275 * return the space used on disk if this item isn't
2276 * compressed or encoded
2278 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2279 btrfs_file_extent_encryption(eb, fi) == 0 &&
2280 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2281 return btrfs_file_extent_inline_item_len(eb,
2282 btrfs_item_nr(slot));
2285 /* otherwise use the ram bytes field */
2286 return btrfs_file_extent_ram_bytes(eb, fi);
2290 * NOTE: Backward compatibility, do not use.
2291 * Replacement: read nodesize directly
2293 __attribute__((deprecated))
2294 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2296 return root->leafsize;
2297 return root->nodesize;
2300 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2302 struct btrfs_super_block *disk_super;
2303 disk_super = fs_info->super_copy;
2304 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2307 static inline int btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2309 struct btrfs_super_block *disk_super;
2310 disk_super = fs_info->super_copy;
2311 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2314 /* helper function to cast into the data area of the leaf. */
2315 #define btrfs_item_ptr(leaf, slot, type) \
2316 ((type *)(btrfs_leaf_data(leaf) + \
2317 btrfs_item_offset_nr(leaf, slot)))
2319 #define btrfs_item_ptr_offset(leaf, slot) \
2320 ((unsigned long)(btrfs_leaf_data(leaf) + \
2321 btrfs_item_offset_nr(leaf, slot)))
2324 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2325 struct btrfs_root *root,
2326 u64 num_bytes, u64 empty_size,
2327 u64 hint_byte, u64 search_end,
2328 struct btrfs_key *ins, int data);
2329 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2330 struct btrfs_root *root);
2331 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2332 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2333 u64 bytenr, u64 num_bytes);
2334 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2335 struct btrfs_root *root);
2336 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2337 btrfs_fs_info *info,
2339 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2340 btrfs_fs_info *info,
2342 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2343 struct btrfs_root *root,
2344 u32 blocksize, u64 root_objectid,
2345 struct btrfs_disk_key *key, int level,
2346 u64 hint, u64 empty_size);
2347 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2348 struct btrfs_root *root,
2349 u64 num_bytes, u64 parent,
2350 u64 root_objectid, u64 ref_generation,
2351 u64 owner, u64 empty_size, u64 hint_byte,
2352 u64 search_end, struct btrfs_key *ins, int data);
2353 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2354 struct btrfs_root *root, u64 bytenr,
2355 u64 offset, int metadata, u64 *refs, u64 *flags);
2356 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2357 struct btrfs_root *root,
2358 u64 bytenr, int level, u64 flags);
2359 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2360 struct extent_buffer *buf, int record_parent);
2361 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2362 struct extent_buffer *buf, int record_parent);
2363 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2364 struct btrfs_root *root,
2365 u64 bytenr, u64 num_bytes, u64 parent,
2366 u64 root_objectid, u64 owner, u64 offset);
2367 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2368 struct btrfs_root *root,
2369 struct extent_io_tree *unpin);
2370 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2371 struct btrfs_root *root,
2372 u64 bytenr, u64 num_bytes, u64 parent,
2373 u64 root_objectid, u64 ref_generation,
2374 u64 owner_objectid);
2375 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2376 struct btrfs_root *root, u64 bytenr,
2377 u64 orig_parent, u64 parent,
2378 u64 root_objectid, u64 ref_generation,
2379 u64 owner_objectid);
2380 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2381 struct btrfs_root *root);
2382 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2383 int btrfs_read_block_groups(struct btrfs_root *root);
2384 struct btrfs_block_group_cache *
2385 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2386 u64 chunk_objectid, u64 chunk_offset, u64 size);
2387 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2388 struct btrfs_root *root, u64 bytes_used,
2389 u64 type, u64 chunk_objectid, u64 chunk_offset,
2391 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2392 struct btrfs_root *root);
2393 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2394 struct btrfs_root *root, u64 bytenr, u64 num,
2395 int alloc, int mark_free);
2396 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2397 struct btrfs_root *root, u64 objectid,
2398 struct btrfs_inode_item *inode,
2399 u64 file_pos, u64 disk_bytenr,
2401 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2402 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2403 void free_excluded_extents(struct btrfs_root *root,
2404 struct btrfs_block_group_cache *cache);
2405 int exclude_super_stripes(struct btrfs_root *root,
2406 struct btrfs_block_group_cache *cache);
2407 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2408 struct btrfs_fs_info *info, u64 start, u64 end);
2409 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2412 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2413 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2414 struct btrfs_path *path, int level, int slot);
2415 enum btrfs_tree_block_status
2416 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2417 struct extent_buffer *buf);
2418 enum btrfs_tree_block_status
2419 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2420 struct extent_buffer *buf);
2421 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2422 int level, int slot, u64 objectid);
2423 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2424 struct extent_buffer *parent, int slot);
2425 int btrfs_previous_item(struct btrfs_root *root,
2426 struct btrfs_path *path, u64 min_objectid,
2428 int btrfs_previous_extent_item(struct btrfs_root *root,
2429 struct btrfs_path *path, u64 min_objectid);
2430 int btrfs_next_extent_item(struct btrfs_root *root,
2431 struct btrfs_path *path, u64 max_objectid);
2432 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2433 struct btrfs_root *root, struct extent_buffer *buf,
2434 struct extent_buffer *parent, int parent_slot,
2435 struct extent_buffer **cow_ret);
2436 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2437 struct btrfs_root *root,
2438 struct extent_buffer *buf,
2439 struct extent_buffer *parent, int parent_slot,
2440 struct extent_buffer **cow_ret,
2441 u64 search_start, u64 empty_size);
2442 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2443 struct btrfs_root *root,
2444 struct extent_buffer *buf,
2445 struct extent_buffer **cow_ret, u64 new_root_objectid);
2446 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2447 *root, struct btrfs_path *path, u32 data_size);
2448 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2449 struct btrfs_root *root,
2450 struct btrfs_path *path,
2451 u32 new_size, int from_end);
2452 int btrfs_split_item(struct btrfs_trans_handle *trans,
2453 struct btrfs_root *root,
2454 struct btrfs_path *path,
2455 struct btrfs_key *new_key,
2456 unsigned long split_offset);
2457 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2458 *root, struct btrfs_key *key, struct btrfs_path *p, int
2460 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2461 u64 iobjectid, u64 ioff, u8 key_type,
2462 struct btrfs_key *found_key);
2463 void btrfs_release_path(struct btrfs_path *p);
2464 void add_root_to_dirty_list(struct btrfs_root *root);
2465 struct btrfs_path *btrfs_alloc_path(void);
2466 void btrfs_free_path(struct btrfs_path *p);
2467 void btrfs_init_path(struct btrfs_path *p);
2468 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2469 struct btrfs_path *path, int slot, int nr);
2471 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2472 struct btrfs_root *root,
2473 struct btrfs_path *path)
2475 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2478 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2479 *root, struct btrfs_key *key, void *data, u32 data_size);
2480 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2481 struct btrfs_root *root,
2482 struct btrfs_path *path,
2483 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2485 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2486 struct btrfs_root *root,
2487 struct btrfs_path *path,
2488 struct btrfs_key *key,
2491 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2494 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2495 static inline int btrfs_next_item(struct btrfs_root *root,
2496 struct btrfs_path *p)
2499 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2500 return btrfs_next_leaf(root, p);
2504 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2505 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2506 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2507 struct btrfs_disk_key *key, int level);
2508 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2509 struct btrfs_key *new_key);
2510 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2511 struct btrfs_path *path,
2512 struct btrfs_key *new_key);
2515 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2516 struct btrfs_root *tree_root,
2517 u64 root_id, u8 type, u64 ref_id,
2518 u64 dirid, u64 sequence,
2519 const char *name, int name_len);
2520 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2521 *root, struct btrfs_key *key, struct btrfs_root_item
2523 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2524 *root, struct btrfs_key *key, struct btrfs_root_item
2526 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2527 btrfs_root_item *item, struct btrfs_key *key);
2529 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2530 *root, const char *name, int name_len, u64 dir,
2531 struct btrfs_key *location, u8 type, u64 index);
2532 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2533 struct btrfs_root *root,
2534 struct btrfs_path *path, u64 dir,
2535 const char *name, int name_len,
2537 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2538 struct btrfs_root *root,
2539 struct btrfs_path *path, u64 dir,
2540 const char *name, int name_len,
2541 u64 index, int mod);
2542 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2543 struct btrfs_root *root,
2544 struct btrfs_path *path,
2545 struct btrfs_dir_item *di);
2546 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2547 struct btrfs_root *root, const char *name,
2548 u16 name_len, const void *data, u16 data_len,
2551 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2552 struct btrfs_root *fs_root,
2553 u64 dirid, u64 *objectid);
2556 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2557 struct btrfs_root *root,
2558 const char *name, int name_len,
2559 u64 inode_objectid, u64 ref_objectid, u64 index);
2560 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2561 *root, u64 objectid, struct btrfs_inode_item
2563 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2564 *root, struct btrfs_path *path,
2565 struct btrfs_key *location, int mod);
2566 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2567 *trans, struct btrfs_path *path, struct btrfs_root *root,
2568 u64 ino, u64 parent_ino, u64 index, const char *name,
2569 int namelen, int ins_len);
2570 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2571 struct btrfs_root *root,
2572 const char *name, int name_len,
2573 u64 inode_objectid, u64 ref_objectid,
2575 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2576 struct btrfs_root *root,
2577 const char *name, int name_len,
2578 u64 inode_objectid, u64 ref_objectid, u64 index);
2579 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2580 struct btrfs_root *root, struct btrfs_path *path,
2581 const char *name, int namelen, u64 ino, u64 parent_ino,
2582 u64 index, int ins_len);
2583 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2584 struct btrfs_root *root, const char *name, int name_len,
2585 u64 ino, u64 parent_ino, u64 *index);
2588 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2589 struct btrfs_root *root, u64 bytenr, u64 len);
2590 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2591 struct btrfs_root *root,
2592 u64 objectid, u64 pos, u64 offset,
2595 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2596 struct btrfs_root *root, u64 objectid,
2597 u64 offset, char *buffer, size_t size);
2598 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2599 struct btrfs_root *root, u64 alloc_end,
2600 u64 bytenr, char *data, size_t len);
2601 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2602 struct btrfs_root *root, struct btrfs_path *path,
2606 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2607 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2610 static inline int is_fstree(u64 rootid)
2612 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2613 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2619 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2620 u64 dir, u64 index);
2621 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2623 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2624 struct btrfs_root *root, u64 ino, u64 flags);
2625 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2626 u64 ino, u64 parent_ino, char *name, int namelen,
2627 u8 type, u64 *index, int add_backref);
2628 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2629 u64 ino, u64 parent_ino, u64 index, const char *name,
2630 int namelen, int add_orphan);
2631 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2632 struct btrfs_root *root, struct btrfs_path *path,
2634 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2635 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2638 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2639 struct btrfs_root *root,
2640 struct btrfs_path *path,
2641 u64 ino, u64 offset, u64 len, int ins_len);
2642 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2643 struct btrfs_root *root,
2644 u64 ino, u64 offset, u64 len);