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__
24 #if BTRFS_FLAT_INCLUDES
26 #include "kerncompat.h"
27 #include "radix-tree.h"
28 #include "extent-cache.h"
29 #include "extent_io.h"
33 #include <btrfs/list.h>
34 #include <btrfs/kerncompat.h>
35 #include <btrfs/radix-tree.h>
36 #include <btrfs/extent-cache.h>
37 #include <btrfs/extent_io.h>
38 #include <btrfs/ioctl.h>
39 #include <btrfs/sizes.h>
40 #endif /* BTRFS_FLAT_INCLUDES */
43 struct btrfs_trans_handle;
44 struct btrfs_free_space_ctl;
45 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
48 * Fake signature for an unfinalized filesystem, which only has barebone tree
49 * structures (normally 6 near empty trees, on SINGLE meta/sys temporary chunks)
51 * ascii !BHRfS_M, no null
53 #define BTRFS_MAGIC_TEMPORARY 0x4D5F536652484221ULL
55 #define BTRFS_MAX_MIRRORS 3
57 #define BTRFS_MAX_LEVEL 8
59 #define BTRFS_COMPAT_EXTENT_TREE_V0
61 /* holds pointers to all of the tree roots */
62 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
64 /* stores information about which extents are in use, and reference counts */
65 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
68 * chunk tree stores translations from logical -> physical block numbering
69 * the super block points to the chunk tree
71 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
74 * stores information about which areas of a given device are in use.
75 * one per device. The tree of tree roots points to the device tree
77 #define BTRFS_DEV_TREE_OBJECTID 4ULL
79 /* one per subvolume, storing files and directories */
80 #define BTRFS_FS_TREE_OBJECTID 5ULL
82 /* directory objectid inside the root tree */
83 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
84 /* holds checksums of all the data extents */
85 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
86 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
88 /* for storing items that use the BTRFS_UUID_KEY* */
89 #define BTRFS_UUID_TREE_OBJECTID 9ULL
91 /* tracks free space in block groups. */
92 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
94 /* device stats in the device tree */
95 #define BTRFS_DEV_STATS_OBJECTID 0ULL
97 /* for storing balance parameters in the root tree */
98 #define BTRFS_BALANCE_OBJECTID -4ULL
100 /* oprhan objectid for tracking unlinked/truncated files */
101 #define BTRFS_ORPHAN_OBJECTID -5ULL
103 /* does write ahead logging to speed up fsyncs */
104 #define BTRFS_TREE_LOG_OBJECTID -6ULL
105 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
107 /* space balancing */
108 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
109 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
112 * extent checksums all have this objectid
113 * this allows them to share the logging tree
116 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
118 /* For storing free space cache */
119 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
122 * The inode number assigned to the special inode for sotring
125 #define BTRFS_FREE_INO_OBJECTID -12ULL
127 /* dummy objectid represents multiple objectids */
128 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
131 * All files have objectids in this range.
133 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
134 #define BTRFS_LAST_FREE_OBJECTID -256ULL
135 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
140 * the device items go into the chunk tree. The key is in the form
141 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
143 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
145 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2ULL
148 * the max metadata block size. This limit is somewhat artificial,
149 * but the memmove costs go through the roof for larger blocks.
151 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
154 * we can actually store much bigger names, but lets not confuse the rest
157 #define BTRFS_NAME_LEN 255
160 * Theoretical limit is larger, but we keep this down to a sane
161 * value. That should limit greatly the possibility of collisions on
164 #define BTRFS_LINK_MAX 65535U
166 /* 32 bytes in various csum fields */
167 #define BTRFS_CSUM_SIZE 32
170 #define BTRFS_CSUM_TYPE_CRC32 0
172 /* four bytes for CRC32 */
173 static int btrfs_csum_sizes[] = { 4 };
175 #define BTRFS_EMPTY_DIR_SIZE 0
177 #define BTRFS_FT_UNKNOWN 0
178 #define BTRFS_FT_REG_FILE 1
179 #define BTRFS_FT_DIR 2
180 #define BTRFS_FT_CHRDEV 3
181 #define BTRFS_FT_BLKDEV 4
182 #define BTRFS_FT_FIFO 5
183 #define BTRFS_FT_SOCK 6
184 #define BTRFS_FT_SYMLINK 7
185 #define BTRFS_FT_XATTR 8
186 #define BTRFS_FT_MAX 9
188 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
191 * the key defines the order in the tree, and so it also defines (optimal)
192 * block layout. objectid corresponds to the inode number. The flags
193 * tells us things about the object, and is a kind of stream selector.
194 * so for a given inode, keys with flags of 1 might refer to the inode
195 * data, flags of 2 may point to file data in the btree and flags == 3
196 * may point to extents.
198 * offset is the starting byte offset for this key in the stream.
200 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
201 * in cpu native order. Otherwise they are identical and their sizes
202 * should be the same (ie both packed)
204 struct btrfs_disk_key {
208 } __attribute__ ((__packed__));
214 } __attribute__ ((__packed__));
216 struct btrfs_mapping_tree {
217 struct cache_tree cache_tree;
220 #define BTRFS_UUID_SIZE 16
221 struct btrfs_dev_item {
222 /* the internal btrfs device id */
225 /* size of the device */
231 /* optimal io alignment for this device */
234 /* optimal io width for this device */
237 /* minimal io size for this device */
240 /* type and info about this device */
243 /* expected generation for this device */
247 * starting byte of this partition on the device,
248 * to allow for stripe alignment in the future
252 /* grouping information for allocation decisions */
255 /* seek speed 0-100 where 100 is fastest */
258 /* bandwidth 0-100 where 100 is fastest */
261 /* btrfs generated uuid for this device */
262 u8 uuid[BTRFS_UUID_SIZE];
264 /* uuid of FS who owns this device */
265 u8 fsid[BTRFS_UUID_SIZE];
266 } __attribute__ ((__packed__));
268 struct btrfs_stripe {
271 u8 dev_uuid[BTRFS_UUID_SIZE];
272 } __attribute__ ((__packed__));
275 /* size of this chunk in bytes */
278 /* objectid of the root referencing this chunk */
284 /* optimal io alignment for this chunk */
287 /* optimal io width for this chunk */
290 /* minimal io size for this chunk */
293 /* 2^16 stripes is quite a lot, a second limit is the size of a single
298 /* sub stripes only matter for raid10 */
300 struct btrfs_stripe stripe;
301 /* additional stripes go here */
302 } __attribute__ ((__packed__));
304 #define BTRFS_FREE_SPACE_EXTENT 1
305 #define BTRFS_FREE_SPACE_BITMAP 2
307 struct btrfs_free_space_entry {
311 } __attribute__ ((__packed__));
313 struct btrfs_free_space_header {
314 struct btrfs_disk_key location;
318 } __attribute__ ((__packed__));
320 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
322 BUG_ON(num_stripes == 0);
323 return sizeof(struct btrfs_chunk) +
324 sizeof(struct btrfs_stripe) * (num_stripes - 1);
327 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
328 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
329 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
330 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
331 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
332 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
334 #define BTRFS_BACKREF_REV_MAX 256
335 #define BTRFS_BACKREF_REV_SHIFT 56
336 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
337 BTRFS_BACKREF_REV_SHIFT)
339 #define BTRFS_OLD_BACKREF_REV 0
340 #define BTRFS_MIXED_BACKREF_REV 1
343 * every tree block (leaf or node) starts with this header.
345 struct btrfs_header {
346 /* these first four must match the super block */
347 u8 csum[BTRFS_CSUM_SIZE];
348 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
349 __le64 bytenr; /* which block this node is supposed to live in */
352 /* allowed to be different from the super from here on down */
353 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
358 } __attribute__ ((__packed__));
360 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
361 #define BTRFS_LEAF_DATA_SIZE(fs_info) \
362 (__BTRFS_LEAF_DATA_SIZE(fs_info->nodesize))
365 * this is a very generous portion of the super block, giving us
366 * room to translate 14 chunks with 3 stripes each.
368 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
369 #define BTRFS_LABEL_SIZE 256
372 * just in case we somehow lose the roots and are not able to mount,
373 * we store an array of the roots from previous transactions
376 #define BTRFS_NUM_BACKUP_ROOTS 4
377 struct btrfs_root_backup {
379 __le64 tree_root_gen;
382 __le64 chunk_root_gen;
385 __le64 extent_root_gen;
394 __le64 csum_root_gen;
404 u8 extent_root_level;
408 /* future and to align */
410 } __attribute__ ((__packed__));
413 * the super block basically lists the main trees of the FS
414 * it currently lacks any block count etc etc
416 struct btrfs_super_block {
417 u8 csum[BTRFS_CSUM_SIZE];
418 /* the first 3 fields must match struct btrfs_header */
419 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
420 __le64 bytenr; /* this block number */
423 /* allowed to be different from the btrfs_header from here own down */
430 /* this will help find the new super based on the log root */
431 __le64 log_root_transid;
434 __le64 root_dir_objectid;
438 /* Unused and must be equal to nodesize */
439 __le32 __unused_leafsize;
441 __le32 sys_chunk_array_size;
442 __le64 chunk_root_generation;
444 __le64 compat_ro_flags;
445 __le64 incompat_flags;
450 struct btrfs_dev_item dev_item;
452 char label[BTRFS_LABEL_SIZE];
454 __le64 cache_generation;
455 __le64 uuid_tree_generation;
457 /* future expansion */
459 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
460 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
461 } __attribute__ ((__packed__));
464 * Compat flags that we support. If any incompat flags are set other than the
465 * ones specified below then we will fail to mount
467 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
469 * Older kernels on big-endian systems produced broken free space tree bitmaps,
470 * and btrfs-progs also used to corrupt the free space tree. If this bit is
471 * clear, then the free space tree cannot be trusted. btrfs-progs can also
472 * intentionally clear this bit to ask the kernel to rebuild the free space
475 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
477 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
478 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
479 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
480 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
481 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)
484 * older kernels tried to do bigger metadata blocks, but the
485 * code was pretty buggy. Lets not let them try anymore.
487 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
488 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
489 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
490 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
491 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
493 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
496 * The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be
497 * added here until read-write support for the free space tree is implemented in
500 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
502 #define BTRFS_FEATURE_INCOMPAT_SUPP \
503 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
504 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
505 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
506 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
507 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
508 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
509 BTRFS_FEATURE_INCOMPAT_RAID56 | \
510 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
511 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
512 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
515 * A leaf is full of items. offset and size tell us where to find
516 * the item in the leaf (relative to the start of the data area)
519 struct btrfs_disk_key key;
522 } __attribute__ ((__packed__));
525 * leaves have an item area and a data area:
526 * [item0, item1....itemN] [free space] [dataN...data1, data0]
528 * The data is separate from the items to get the keys closer together
532 struct btrfs_header header;
533 struct btrfs_item items[];
534 } __attribute__ ((__packed__));
537 * all non-leaf blocks are nodes, they hold only keys and pointers to
540 struct btrfs_key_ptr {
541 struct btrfs_disk_key key;
544 } __attribute__ ((__packed__));
547 struct btrfs_header header;
548 struct btrfs_key_ptr ptrs[];
549 } __attribute__ ((__packed__));
552 * btrfs_paths remember the path taken from the root down to the leaf.
553 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
554 * to any other levels that are present.
556 * The slots array records the index of the item or block pointer
557 * used while walking the tree.
561 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
562 int slots[BTRFS_MAX_LEVEL];
564 /* The kernel locking sheme is not done in userspace. */
565 int locks[BTRFS_MAX_LEVEL];
568 /* keep some upper locks as we walk down */
572 * set by btrfs_split_item, tells search_slot to keep all locks
573 * and to force calls to keep space in the nodes
580 * items in the extent btree are used to record the objectid of the
581 * owner of the block and the number of references
584 struct btrfs_extent_item {
588 } __attribute__ ((__packed__));
590 struct btrfs_extent_item_v0 {
592 } __attribute__ ((__packed__));
594 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) \
595 ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
596 sizeof(struct btrfs_item))
597 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
599 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
600 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
602 /* following flags only apply to tree blocks */
604 /* use full backrefs for extent pointers in the block*/
605 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
607 struct btrfs_tree_block_info {
608 struct btrfs_disk_key key;
610 } __attribute__ ((__packed__));
612 struct btrfs_extent_data_ref {
617 } __attribute__ ((__packed__));
619 struct btrfs_shared_data_ref {
621 } __attribute__ ((__packed__));
623 struct btrfs_extent_inline_ref {
626 } __attribute__ ((__packed__));
628 struct btrfs_extent_ref_v0 {
633 } __attribute__ ((__packed__));
635 /* dev extents record free space on individual devices. The owner
636 * field points back to the chunk allocation mapping tree that allocated
637 * the extent. The chunk tree uuid field is a way to double check the owner
639 struct btrfs_dev_extent {
641 __le64 chunk_objectid;
644 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
645 } __attribute__ ((__packed__));
647 struct btrfs_inode_ref {
651 } __attribute__ ((__packed__));
653 struct btrfs_inode_extref {
654 __le64 parent_objectid;
657 __u8 name[0]; /* name goes here */
658 } __attribute__ ((__packed__));
660 struct btrfs_timespec {
663 } __attribute__ ((__packed__));
666 BTRFS_COMPRESS_NONE = 0,
667 BTRFS_COMPRESS_ZLIB = 1,
668 BTRFS_COMPRESS_LZO = 2,
669 BTRFS_COMPRESS_ZSTD = 3,
670 BTRFS_COMPRESS_TYPES = 3,
671 BTRFS_COMPRESS_LAST = 4,
672 } btrfs_compression_type;
674 /* we don't understand any encryption methods right now */
676 BTRFS_ENCRYPTION_NONE = 0,
677 BTRFS_ENCRYPTION_LAST = 1,
678 } btrfs_encryption_type;
680 enum btrfs_tree_block_status {
681 BTRFS_TREE_BLOCK_CLEAN,
682 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
683 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
684 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
685 BTRFS_TREE_BLOCK_INVALID_LEVEL,
686 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
687 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
690 struct btrfs_inode_item {
691 /* nfs style generation number */
693 /* transid that last touched this inode */
705 /* modification sequence number for NFS */
709 * a little future expansion, for more than this we can
710 * just grow the inode item and version it
713 struct btrfs_timespec atime;
714 struct btrfs_timespec ctime;
715 struct btrfs_timespec mtime;
716 struct btrfs_timespec otime;
717 } __attribute__ ((__packed__));
719 struct btrfs_dir_log_item {
721 } __attribute__ ((__packed__));
723 struct btrfs_dir_item {
724 struct btrfs_disk_key location;
729 } __attribute__ ((__packed__));
731 struct btrfs_root_item_v0 {
732 struct btrfs_inode_item inode;
738 __le64 last_snapshot;
741 struct btrfs_disk_key drop_progress;
744 } __attribute__ ((__packed__));
746 struct btrfs_root_item {
747 struct btrfs_inode_item inode;
753 __le64 last_snapshot;
756 struct btrfs_disk_key drop_progress;
761 * The following fields appear after subvol_uuids+subvol_times
766 * This generation number is used to test if the new fields are valid
767 * and up to date while reading the root item. Every time the root item
768 * is written out, the "generation" field is copied into this field. If
769 * anyone ever mounted the fs with an older kernel, we will have
770 * mismatching generation values here and thus must invalidate the
771 * new fields. See btrfs_update_root and btrfs_find_last_root for
773 * the offset of generation_v2 is also used as the start for the memset
774 * when invalidating the fields.
776 __le64 generation_v2;
777 u8 uuid[BTRFS_UUID_SIZE];
778 u8 parent_uuid[BTRFS_UUID_SIZE];
779 u8 received_uuid[BTRFS_UUID_SIZE];
780 __le64 ctransid; /* updated when an inode changes */
781 __le64 otransid; /* trans when created */
782 __le64 stransid; /* trans when sent. non-zero for received subvol */
783 __le64 rtransid; /* trans when received. non-zero for received subvol */
784 struct btrfs_timespec ctime;
785 struct btrfs_timespec otime;
786 struct btrfs_timespec stime;
787 struct btrfs_timespec rtime;
788 __le64 reserved[8]; /* for future */
789 } __attribute__ ((__packed__));
792 * this is used for both forward and backward root refs
794 struct btrfs_root_ref {
798 } __attribute__ ((__packed__));
800 struct btrfs_disk_balance_args {
802 * profiles to operate on, single is denoted by
803 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
809 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
810 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
823 /* devid subset filter [pstart..pend) */
827 /* btrfs virtual address space subset filter [vstart..vend) */
832 * profile to convert to, single is denoted by
833 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
837 /* BTRFS_BALANCE_ARGS_* */
841 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
842 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
854 * Process chunks that cross stripes_min..stripes_max devices,
855 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
861 } __attribute__ ((__packed__));
864 * store balance parameters to disk so that balance can be properly
865 * resumed after crash or unmount
867 struct btrfs_balance_item {
868 /* BTRFS_BALANCE_* */
871 struct btrfs_disk_balance_args data;
872 struct btrfs_disk_balance_args meta;
873 struct btrfs_disk_balance_args sys;
876 } __attribute__ ((__packed__));
878 #define BTRFS_FILE_EXTENT_INLINE 0
879 #define BTRFS_FILE_EXTENT_REG 1
880 #define BTRFS_FILE_EXTENT_PREALLOC 2
882 struct btrfs_file_extent_item {
884 * transaction id that created this extent
888 * max number of bytes to hold this extent in ram
889 * when we split a compressed extent we can't know how big
890 * each of the resulting pieces will be. So, this is
891 * an upper limit on the size of the extent in ram instead of
897 * 32 bits for the various ways we might encode the data,
898 * including compression and encryption. If any of these
899 * are set to something a given disk format doesn't understand
900 * it is treated like an incompat flag for reading and writing,
905 __le16 other_encoding; /* spare for later use */
907 /* are we inline data or a real extent? */
911 * disk space consumed by the extent, checksum blocks are included
915 __le64 disk_num_bytes;
917 * the logical offset in file blocks (no csums)
918 * this extent record is for. This allows a file extent to point
919 * into the middle of an existing extent on disk, sharing it
920 * between two snapshots (useful if some bytes in the middle of the
921 * extent have changed
925 * the logical number of file blocks (no csums included)
929 } __attribute__ ((__packed__));
931 struct btrfs_dev_stats_item {
933 * grow this item struct at the end for future enhancements and keep
934 * the existing values unchanged
936 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
937 } __attribute__ ((__packed__));
939 struct btrfs_csum_item {
941 } __attribute__ ((__packed__));
944 * We don't want to overwrite 1M at the beginning of device, even though
945 * there is our 1st superblock at 64k. Some possible reasons:
946 * - the first 64k blank is useful for some boot loader/manager
947 * - the first 1M could be scratched by buggy partitioner or somesuch
949 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)SZ_1M)
951 /* tag for the radix tree of block groups in ram */
952 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
953 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
954 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
955 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
956 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
957 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
958 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
959 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
960 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
961 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
963 enum btrfs_raid_types {
974 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
975 BTRFS_BLOCK_GROUP_SYSTEM | \
976 BTRFS_BLOCK_GROUP_METADATA)
978 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
979 BTRFS_BLOCK_GROUP_RAID1 | \
980 BTRFS_BLOCK_GROUP_RAID5 | \
981 BTRFS_BLOCK_GROUP_RAID6 | \
982 BTRFS_BLOCK_GROUP_DUP | \
983 BTRFS_BLOCK_GROUP_RAID10)
985 /* used in struct btrfs_balance_args fields */
986 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
989 * GLOBAL_RSV does not exist as a on-disk block group type and is used
990 * internally for exporting info about global block reserve from space infos
992 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
994 #define BTRFS_QGROUP_LEVEL_SHIFT 48
996 static inline u64 btrfs_qgroup_level(u64 qgroupid)
998 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
1001 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
1003 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
1006 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1007 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1008 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1010 struct btrfs_qgroup_status_item {
1014 __le64 rescan; /* progress during scanning */
1015 } __attribute__ ((__packed__));
1017 struct btrfs_block_group_item {
1019 __le64 chunk_objectid;
1021 } __attribute__ ((__packed__));
1023 struct btrfs_free_space_info {
1024 __le32 extent_count;
1026 } __attribute__ ((__packed__));
1028 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1030 struct btrfs_qgroup_info_item {
1033 __le64 referenced_compressed;
1035 __le64 exclusive_compressed;
1036 } __attribute__ ((__packed__));
1038 /* flags definition for qgroup limits */
1039 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1040 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1041 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1042 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1043 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1044 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1046 struct btrfs_qgroup_limit_item {
1048 __le64 max_referenced;
1049 __le64 max_exclusive;
1050 __le64 rsv_referenced;
1051 __le64 rsv_exclusive;
1052 } __attribute__ ((__packed__));
1054 struct btrfs_space_info {
1060 struct list_head list;
1063 struct btrfs_block_group_cache {
1064 struct cache_extent cache;
1065 struct btrfs_key key;
1066 struct btrfs_block_group_item item;
1067 struct btrfs_space_info *space_info;
1068 struct btrfs_free_space_ctl *free_space_ctl;
1076 struct btrfs_device;
1077 struct btrfs_fs_devices;
1078 struct btrfs_fs_info {
1079 u8 fsid[BTRFS_FSID_SIZE];
1081 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1082 u8 *new_chunk_tree_uuid;
1083 struct btrfs_root *fs_root;
1084 struct btrfs_root *extent_root;
1085 struct btrfs_root *tree_root;
1086 struct btrfs_root *chunk_root;
1087 struct btrfs_root *dev_root;
1088 struct btrfs_root *csum_root;
1089 struct btrfs_root *quota_root;
1090 struct btrfs_root *free_space_root;
1092 struct rb_root fs_root_tree;
1094 /* the log root tree is a directory of all the other log roots */
1095 struct btrfs_root *log_root_tree;
1097 struct extent_io_tree extent_cache;
1098 struct extent_io_tree free_space_cache;
1099 struct extent_io_tree block_group_cache;
1100 struct extent_io_tree pinned_extents;
1101 struct extent_io_tree pending_del;
1102 struct extent_io_tree extent_ins;
1103 struct extent_io_tree *excluded_extents;
1105 /* logical->physical extent mapping */
1106 struct btrfs_mapping_tree mapping_tree;
1109 u64 last_trans_committed;
1111 u64 avail_data_alloc_bits;
1112 u64 avail_metadata_alloc_bits;
1113 u64 avail_system_alloc_bits;
1114 u64 data_alloc_profile;
1115 u64 metadata_alloc_profile;
1116 u64 system_alloc_profile;
1119 struct btrfs_trans_handle *running_transaction;
1120 struct btrfs_super_block *super_copy;
1121 struct mutex fs_mutex;
1126 struct list_head dirty_cowonly_roots;
1127 struct list_head recow_ebs;
1129 struct btrfs_fs_devices *fs_devices;
1130 struct list_head space_info;
1132 unsigned int system_allocs:1;
1133 unsigned int readonly:1;
1134 unsigned int on_restoring:1;
1135 unsigned int is_chunk_recover:1;
1136 unsigned int quota_enabled:1;
1137 unsigned int suppress_check_block_errors:1;
1138 unsigned int ignore_fsid_mismatch:1;
1139 unsigned int ignore_chunk_tree_error:1;
1140 unsigned int avoid_meta_chunk_alloc:1;
1141 unsigned int avoid_sys_chunk_alloc:1;
1142 unsigned int finalize_on_close:1;
1144 int transaction_aborted;
1146 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1147 struct btrfs_root *root,
1148 u64 bytenr, u64 num_bytes, u64 parent,
1149 u64 root_objectid, u64 owner, u64 offset,
1151 struct cache_tree *fsck_extent_cache;
1152 struct cache_tree *corrupt_blocks;
1154 /* Cached block sizes */
1161 * in ram representation of the tree. extent_root is used for all allocations
1162 * and for the extent tree extent_root root.
1165 struct extent_buffer *node;
1166 struct extent_buffer *commit_root;
1167 struct btrfs_root_item root_item;
1168 struct btrfs_key root_key;
1169 struct btrfs_fs_info *fs_info;
1178 u64 last_inode_alloc;
1181 * Record orphan data extent ref
1183 * TODO: Don't restore things in btrfs_root.
1184 * Directly record it into inode_record, which needs a lot of
1185 * infrastructure change to allow cooperation between extent
1188 struct list_head orphan_data_extents;
1190 /* the dirty list is only used by non-reference counted roots */
1191 struct list_head dirty_list;
1192 struct rb_node rb_node;
1195 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1197 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1200 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1202 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1205 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1206 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1207 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1209 return BTRFS_MAX_ITEM_SIZE(info) -
1210 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1213 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1215 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1219 * inode items have the data typically returned from stat and store other
1220 * info about object characteristics. There is one for every file and dir in
1223 #define BTRFS_INODE_ITEM_KEY 1
1224 #define BTRFS_INODE_REF_KEY 12
1225 #define BTRFS_INODE_EXTREF_KEY 13
1226 #define BTRFS_XATTR_ITEM_KEY 24
1227 #define BTRFS_ORPHAN_ITEM_KEY 48
1229 #define BTRFS_DIR_LOG_ITEM_KEY 60
1230 #define BTRFS_DIR_LOG_INDEX_KEY 72
1232 * dir items are the name -> inode pointers in a directory. There is one
1233 * for every name in a directory.
1235 #define BTRFS_DIR_ITEM_KEY 84
1236 #define BTRFS_DIR_INDEX_KEY 96
1239 * extent data is for file data
1241 #define BTRFS_EXTENT_DATA_KEY 108
1244 * csum items have the checksums for data in the extents
1246 #define BTRFS_CSUM_ITEM_KEY 120
1248 * extent csums are stored in a separate tree and hold csums for
1249 * an entire extent on disk.
1251 #define BTRFS_EXTENT_CSUM_KEY 128
1254 * root items point to tree roots. There are typically in the root
1255 * tree used by the super block to find all the other trees
1257 #define BTRFS_ROOT_ITEM_KEY 132
1260 * root backrefs tie subvols and snapshots to the directory entries that
1263 #define BTRFS_ROOT_BACKREF_KEY 144
1266 * root refs make a fast index for listing all of the snapshots and
1267 * subvolumes referenced by a given root. They point directly to the
1268 * directory item in the root that references the subvol
1270 #define BTRFS_ROOT_REF_KEY 156
1273 * extent items are in the extent map tree. These record which blocks
1274 * are used, and how many references there are to each block
1276 #define BTRFS_EXTENT_ITEM_KEY 168
1279 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1280 * the length, so we save the level in key->offset instead of the length.
1282 #define BTRFS_METADATA_ITEM_KEY 169
1284 #define BTRFS_TREE_BLOCK_REF_KEY 176
1286 #define BTRFS_EXTENT_DATA_REF_KEY 178
1288 /* old style extent backrefs */
1289 #define BTRFS_EXTENT_REF_V0_KEY 180
1291 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1293 #define BTRFS_SHARED_DATA_REF_KEY 184
1297 * block groups give us hints into the extent allocation trees. Which
1298 * blocks are free etc etc
1300 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1303 * Every block group is represented in the free space tree by a free space info
1304 * item, which stores some accounting information. It is keyed on
1305 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1307 #define BTRFS_FREE_SPACE_INFO_KEY 198
1310 * A free space extent tracks an extent of space that is free in a block group.
1311 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1313 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1316 * When a block group becomes very fragmented, we convert it to use bitmaps
1317 * instead of extents. A free space bitmap is keyed on
1318 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1319 * (length / sectorsize) bits.
1321 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1323 #define BTRFS_DEV_EXTENT_KEY 204
1324 #define BTRFS_DEV_ITEM_KEY 216
1325 #define BTRFS_CHUNK_ITEM_KEY 228
1327 #define BTRFS_BALANCE_ITEM_KEY 248
1332 #define BTRFS_QGROUP_STATUS_KEY 240
1333 #define BTRFS_QGROUP_INFO_KEY 242
1334 #define BTRFS_QGROUP_LIMIT_KEY 244
1335 #define BTRFS_QGROUP_RELATION_KEY 246
1338 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1340 #define BTRFS_BALANCE_ITEM_KEY 248
1343 * The key type for tree items that are stored persistently, but do not need to
1344 * exist for extended period of time. The items can exist in any tree.
1346 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1350 * - balance status item
1351 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1353 #define BTRFS_TEMPORARY_ITEM_KEY 248
1356 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1358 #define BTRFS_DEV_STATS_KEY 249
1361 * The key type for tree items that are stored persistently and usually exist
1362 * for a long period, eg. filesystem lifetime. The item kinds can be status
1363 * information, stats or preference values. The item can exist in any tree.
1365 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1369 * - device statistics, store IO stats in the device tree, one key for all
1371 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1373 #define BTRFS_PERSISTENT_ITEM_KEY 249
1376 * Persistently stores the device replace state in the device tree.
1377 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1379 #define BTRFS_DEV_REPLACE_KEY 250
1382 * Stores items that allow to quickly map UUIDs to something else.
1383 * These items are part of the filesystem UUID tree.
1384 * The key is built like this:
1385 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1387 #if BTRFS_UUID_SIZE != 16
1388 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1390 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1391 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1392 * received subvols */
1395 * string items are for debugging. They just store a short string of
1398 #define BTRFS_STRING_ITEM_KEY 253
1402 #define BTRFS_INODE_NODATASUM (1 << 0)
1403 #define BTRFS_INODE_NODATACOW (1 << 1)
1404 #define BTRFS_INODE_READONLY (1 << 2)
1405 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1406 #define BTRFS_INODE_PREALLOC (1 << 4)
1407 #define BTRFS_INODE_SYNC (1 << 5)
1408 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1409 #define BTRFS_INODE_APPEND (1 << 7)
1410 #define BTRFS_INODE_NODUMP (1 << 8)
1411 #define BTRFS_INODE_NOATIME (1 << 9)
1412 #define BTRFS_INODE_DIRSYNC (1 << 10)
1413 #define BTRFS_INODE_COMPRESS (1 << 11)
1415 #define read_eb_member(eb, ptr, type, member, result) ( \
1416 read_extent_buffer(eb, (char *)(result), \
1417 ((unsigned long)(ptr)) + \
1418 offsetof(type, member), \
1419 sizeof(((type *)0)->member)))
1421 #define write_eb_member(eb, ptr, type, member, result) ( \
1422 write_extent_buffer(eb, (char *)(result), \
1423 ((unsigned long)(ptr)) + \
1424 offsetof(type, member), \
1425 sizeof(((type *)0)->member)))
1427 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1428 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1430 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1431 return le##bits##_to_cpu(h->member); \
1433 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1436 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1437 h->member = cpu_to_le##bits(val); \
1440 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1441 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1444 unsigned long offset = (unsigned long)s; \
1445 const type *p = (type *) (eb->data + offset); \
1446 return get_unaligned_le##bits(&p->member); \
1448 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1449 type *s, u##bits val) \
1451 unsigned long offset = (unsigned long)s; \
1452 type *p = (type *) (eb->data + offset); \
1453 put_unaligned_le##bits(val, &p->member); \
1456 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1457 static inline u##bits btrfs_##name(const type *s) \
1459 return le##bits##_to_cpu(s->member); \
1461 static inline void btrfs_set_##name(type *s, u##bits val) \
1463 s->member = cpu_to_le##bits(val); \
1466 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1467 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1468 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1469 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1470 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1471 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1473 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1474 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1475 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1476 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1477 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1478 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1480 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1481 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1483 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1485 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1487 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1489 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1491 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1492 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1494 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1496 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1498 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1501 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1503 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1506 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1508 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1511 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1512 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1513 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1514 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1515 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1516 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1517 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1518 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1519 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1520 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1521 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1523 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1525 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1528 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1529 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1530 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1532 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1534 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1536 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1538 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1539 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1541 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1543 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1544 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1546 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1549 unsigned long offset = (unsigned long)c;
1550 offset += offsetof(struct btrfs_chunk, stripe);
1551 offset += nr * sizeof(struct btrfs_stripe);
1552 return (struct btrfs_stripe *)offset;
1555 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1557 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1560 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1561 struct btrfs_chunk *c, int nr)
1563 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1566 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1567 struct btrfs_chunk *c, int nr,
1570 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1573 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1574 struct btrfs_chunk *c, int nr)
1576 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1579 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1580 struct btrfs_chunk *c, int nr,
1583 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1586 /* struct btrfs_block_group_item */
1587 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1589 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1591 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1592 struct btrfs_block_group_item, chunk_objectid, 64);
1594 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1595 struct btrfs_block_group_item, chunk_objectid, 64);
1596 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1597 struct btrfs_block_group_item, flags, 64);
1598 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1599 struct btrfs_block_group_item, flags, 64);
1601 /* struct btrfs_free_space_info */
1602 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1604 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1606 /* struct btrfs_inode_ref */
1607 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1608 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1609 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1611 /* struct btrfs_inode_extref */
1612 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1613 parent_objectid, 64);
1614 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1616 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1618 /* struct btrfs_inode_item */
1619 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1620 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1621 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1622 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1623 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1624 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1625 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1626 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1627 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1628 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1629 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1630 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1632 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1633 struct btrfs_inode_item, generation, 64);
1634 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1635 struct btrfs_inode_item, sequence, 64);
1636 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1637 struct btrfs_inode_item, transid, 64);
1638 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1639 struct btrfs_inode_item, size, 64);
1640 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1641 struct btrfs_inode_item, nbytes, 64);
1642 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1643 struct btrfs_inode_item, block_group, 64);
1644 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1645 struct btrfs_inode_item, nlink, 32);
1646 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1647 struct btrfs_inode_item, uid, 32);
1648 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1649 struct btrfs_inode_item, gid, 32);
1650 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1651 struct btrfs_inode_item, mode, 32);
1652 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1653 struct btrfs_inode_item, rdev, 64);
1654 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1655 struct btrfs_inode_item, flags, 64);
1657 static inline struct btrfs_timespec *
1658 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1660 unsigned long ptr = (unsigned long)inode_item;
1661 ptr += offsetof(struct btrfs_inode_item, atime);
1662 return (struct btrfs_timespec *)ptr;
1665 static inline struct btrfs_timespec *
1666 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1668 unsigned long ptr = (unsigned long)inode_item;
1669 ptr += offsetof(struct btrfs_inode_item, mtime);
1670 return (struct btrfs_timespec *)ptr;
1673 static inline struct btrfs_timespec *
1674 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1676 unsigned long ptr = (unsigned long)inode_item;
1677 ptr += offsetof(struct btrfs_inode_item, ctime);
1678 return (struct btrfs_timespec *)ptr;
1681 static inline struct btrfs_timespec *
1682 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1684 unsigned long ptr = (unsigned long)inode_item;
1685 ptr += offsetof(struct btrfs_inode_item, otime);
1686 return (struct btrfs_timespec *)ptr;
1689 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1690 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1691 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1693 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1696 /* struct btrfs_dev_extent */
1697 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1699 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1700 chunk_objectid, 64);
1701 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1703 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1705 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1708 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1710 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1711 return (u8 *)((unsigned long)dev + ptr);
1715 /* struct btrfs_extent_item */
1716 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1717 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1718 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1720 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1721 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1723 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1725 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1727 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1728 struct btrfs_tree_block_info *item,
1729 struct btrfs_disk_key *key)
1731 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1734 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1735 struct btrfs_tree_block_info *item,
1736 struct btrfs_disk_key *key)
1738 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1741 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1743 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1745 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1747 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1750 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1753 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1755 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1757 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1758 struct btrfs_extent_inline_ref, type, 8);
1759 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1760 struct btrfs_extent_inline_ref, offset, 64);
1762 static inline u32 btrfs_extent_inline_ref_size(int type)
1764 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1765 type == BTRFS_SHARED_BLOCK_REF_KEY)
1766 return sizeof(struct btrfs_extent_inline_ref);
1767 if (type == BTRFS_SHARED_DATA_REF_KEY)
1768 return sizeof(struct btrfs_shared_data_ref) +
1769 sizeof(struct btrfs_extent_inline_ref);
1770 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1771 return sizeof(struct btrfs_extent_data_ref) +
1772 offsetof(struct btrfs_extent_inline_ref, offset);
1777 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1778 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1780 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1781 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1783 /* struct btrfs_node */
1784 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1785 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1787 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1790 ptr = offsetof(struct btrfs_node, ptrs) +
1791 sizeof(struct btrfs_key_ptr) * nr;
1792 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1795 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1799 ptr = offsetof(struct btrfs_node, ptrs) +
1800 sizeof(struct btrfs_key_ptr) * nr;
1801 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1804 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1807 ptr = offsetof(struct btrfs_node, ptrs) +
1808 sizeof(struct btrfs_key_ptr) * nr;
1809 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1812 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1816 ptr = offsetof(struct btrfs_node, ptrs) +
1817 sizeof(struct btrfs_key_ptr) * nr;
1818 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1821 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1823 return offsetof(struct btrfs_node, ptrs) +
1824 sizeof(struct btrfs_key_ptr) * nr;
1827 static inline void btrfs_node_key(struct extent_buffer *eb,
1828 struct btrfs_disk_key *disk_key, int nr)
1831 ptr = btrfs_node_key_ptr_offset(nr);
1832 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1833 struct btrfs_key_ptr, key, disk_key);
1836 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1837 struct btrfs_disk_key *disk_key, int nr)
1840 ptr = btrfs_node_key_ptr_offset(nr);
1841 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1842 struct btrfs_key_ptr, key, disk_key);
1845 /* struct btrfs_item */
1846 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1847 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1849 static inline unsigned long btrfs_item_nr_offset(int nr)
1851 return offsetof(struct btrfs_leaf, items) +
1852 sizeof(struct btrfs_item) * nr;
1855 static inline struct btrfs_item *btrfs_item_nr(int nr)
1857 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1860 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1861 struct btrfs_item *item)
1863 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1866 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1868 return btrfs_item_end(eb, btrfs_item_nr(nr));
1871 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1873 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1876 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1878 return btrfs_item_size(eb, btrfs_item_nr(nr));
1881 static inline void btrfs_item_key(struct extent_buffer *eb,
1882 struct btrfs_disk_key *disk_key, int nr)
1884 struct btrfs_item *item = btrfs_item_nr(nr);
1885 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1888 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1889 struct btrfs_disk_key *disk_key, int nr)
1891 struct btrfs_item *item = btrfs_item_nr(nr);
1892 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1895 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1898 * struct btrfs_root_ref
1900 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1901 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1902 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1904 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1905 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1906 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1908 /* struct btrfs_dir_item */
1909 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1910 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1911 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1912 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1914 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1915 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1916 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1917 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1919 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1920 struct btrfs_dir_item *item,
1921 struct btrfs_disk_key *key)
1923 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1926 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1927 struct btrfs_dir_item *item,
1928 struct btrfs_disk_key *key)
1930 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1933 /* struct btrfs_free_space_header */
1934 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1936 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1938 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1941 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1942 struct btrfs_free_space_header *h,
1943 struct btrfs_disk_key *key)
1945 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1948 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1949 struct btrfs_free_space_header *h,
1950 struct btrfs_disk_key *key)
1952 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1955 /* struct btrfs_disk_key */
1956 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1958 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1959 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1961 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1962 struct btrfs_disk_key *disk)
1964 cpu->offset = le64_to_cpu(disk->offset);
1965 cpu->type = disk->type;
1966 cpu->objectid = le64_to_cpu(disk->objectid);
1969 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1970 struct btrfs_key *cpu)
1972 disk->offset = cpu_to_le64(cpu->offset);
1973 disk->type = cpu->type;
1974 disk->objectid = cpu_to_le64(cpu->objectid);
1977 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1978 struct btrfs_key *key, int nr)
1980 struct btrfs_disk_key disk_key;
1981 btrfs_node_key(eb, &disk_key, nr);
1982 btrfs_disk_key_to_cpu(key, &disk_key);
1985 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1986 struct btrfs_key *key, int nr)
1988 struct btrfs_disk_key disk_key;
1989 btrfs_item_key(eb, &disk_key, nr);
1990 btrfs_disk_key_to_cpu(key, &disk_key);
1993 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1994 struct btrfs_dir_item *item,
1995 struct btrfs_key *key)
1997 struct btrfs_disk_key disk_key;
1998 btrfs_dir_item_key(eb, item, &disk_key);
1999 btrfs_disk_key_to_cpu(key, &disk_key);
2002 /* struct btrfs_header */
2003 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2004 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2006 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2007 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2008 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2009 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2010 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2011 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
2013 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2014 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2017 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2019 return (btrfs_header_flags(eb) & flag) == flag;
2022 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2024 u64 flags = btrfs_header_flags(eb);
2025 btrfs_set_header_flags(eb, flags | flag);
2026 return (flags & flag) == flag;
2029 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2031 u64 flags = btrfs_header_flags(eb);
2032 btrfs_set_header_flags(eb, flags & ~flag);
2033 return (flags & flag) == flag;
2036 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2038 u64 flags = btrfs_header_flags(eb);
2039 return flags >> BTRFS_BACKREF_REV_SHIFT;
2042 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2045 u64 flags = btrfs_header_flags(eb);
2046 flags &= ~BTRFS_BACKREF_REV_MASK;
2047 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2048 btrfs_set_header_flags(eb, flags);
2051 static inline unsigned long btrfs_header_fsid(void)
2053 return offsetof(struct btrfs_header, fsid);
2056 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2058 return offsetof(struct btrfs_header, chunk_tree_uuid);
2061 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
2063 unsigned long ptr = offsetof(struct btrfs_header, csum);
2067 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2069 return (btrfs_header_level(eb) == 0);
2072 /* struct btrfs_root_item */
2073 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2075 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2076 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2077 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2079 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2081 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2082 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2083 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2084 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2085 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2086 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2087 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2088 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2090 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2092 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2094 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2096 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2098 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2101 static inline struct btrfs_timespec* btrfs_root_ctime(
2102 struct btrfs_root_item *root_item)
2104 unsigned long ptr = (unsigned long)root_item;
2105 ptr += offsetof(struct btrfs_root_item, ctime);
2106 return (struct btrfs_timespec *)ptr;
2109 static inline struct btrfs_timespec* btrfs_root_otime(
2110 struct btrfs_root_item *root_item)
2112 unsigned long ptr = (unsigned long)root_item;
2113 ptr += offsetof(struct btrfs_root_item, otime);
2114 return (struct btrfs_timespec *)ptr;
2117 static inline struct btrfs_timespec* btrfs_root_stime(
2118 struct btrfs_root_item *root_item)
2120 unsigned long ptr = (unsigned long)root_item;
2121 ptr += offsetof(struct btrfs_root_item, stime);
2122 return (struct btrfs_timespec *)ptr;
2125 static inline struct btrfs_timespec* btrfs_root_rtime(
2126 struct btrfs_root_item *root_item)
2128 unsigned long ptr = (unsigned long)root_item;
2129 ptr += offsetof(struct btrfs_root_item, rtime);
2130 return (struct btrfs_timespec *)ptr;
2133 /* struct btrfs_root_backup */
2134 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2136 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2138 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2139 tree_root_level, 8);
2141 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2143 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2144 chunk_root_gen, 64);
2145 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2146 chunk_root_level, 8);
2148 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2150 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2151 extent_root_gen, 64);
2152 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2153 extent_root_level, 8);
2155 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2157 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2159 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2162 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2164 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2166 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2169 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2171 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2173 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2174 csum_root_level, 8);
2175 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2177 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2179 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2182 /* struct btrfs_super_block */
2184 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2185 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2186 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2188 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2189 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2190 struct btrfs_super_block, sys_chunk_array_size, 32);
2191 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2192 struct btrfs_super_block, chunk_root_generation, 64);
2193 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2195 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2197 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2198 chunk_root_level, 8);
2199 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2201 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2202 log_root_transid, 64);
2203 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2205 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2207 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2209 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2211 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2213 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2215 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2216 root_dir_objectid, 64);
2217 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2219 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2221 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2222 compat_ro_flags, 64);
2223 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2224 incompat_flags, 64);
2225 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2227 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2228 cache_generation, 64);
2229 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2230 uuid_tree_generation, 64);
2231 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2233 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2235 int t = btrfs_super_csum_type(s);
2236 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2237 return btrfs_csum_sizes[t];
2240 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2242 return offsetof(struct btrfs_leaf, items);
2245 /* struct btrfs_file_extent_item */
2246 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2247 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2249 static inline unsigned long btrfs_file_extent_inline_start(struct
2250 btrfs_file_extent_item *e)
2252 unsigned long offset = (unsigned long)e;
2253 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2257 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2259 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2262 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2264 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2266 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2268 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2270 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2271 disk_num_bytes, 64);
2272 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2274 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2276 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2278 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2280 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2282 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2284 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2286 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2288 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2290 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2291 other_encoding, 16);
2293 /* btrfs_qgroup_status_item */
2294 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2296 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2298 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2300 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2303 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2304 struct btrfs_qgroup_status_item, version, 64);
2305 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2306 struct btrfs_qgroup_status_item, generation, 64);
2307 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2308 struct btrfs_qgroup_status_item, flags, 64);
2309 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2310 struct btrfs_qgroup_status_item, rescan, 64);
2312 /* btrfs_qgroup_info_item */
2313 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2315 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2317 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2318 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2319 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2321 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2322 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2324 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2325 struct btrfs_qgroup_info_item, generation, 64);
2326 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2327 struct btrfs_qgroup_info_item, referenced, 64);
2328 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2329 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2330 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2331 struct btrfs_qgroup_info_item, exclusive, 64);
2332 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2333 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2335 /* btrfs_qgroup_limit_item */
2336 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2338 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2339 max_referenced, 64);
2340 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2342 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2343 rsv_referenced, 64);
2344 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2347 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2348 struct btrfs_qgroup_limit_item, flags, 64);
2349 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2350 struct btrfs_qgroup_limit_item, max_referenced, 64);
2351 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2352 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2353 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2354 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2355 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2356 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2358 /* btrfs_balance_item */
2359 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
2361 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
2362 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2364 unsigned long offset = (unsigned long)bi;
2365 struct btrfs_balance_item *p;
2366 p = (struct btrfs_balance_item *)(eb->data + offset);
2370 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
2371 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2373 unsigned long offset = (unsigned long)bi;
2374 struct btrfs_balance_item *p;
2375 p = (struct btrfs_balance_item *)(eb->data + offset);
2379 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
2380 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2382 unsigned long offset = (unsigned long)bi;
2383 struct btrfs_balance_item *p;
2384 p = (struct btrfs_balance_item *)(eb->data + offset);
2389 * btrfs_dev_stats_item helper, returns pointer to the raw array, do the
2390 * endiannes conversion, @dsi is offset to eb data
2392 static inline __le64* btrfs_dev_stats_values(struct extent_buffer *eb,
2393 struct btrfs_dev_stats_item *dsi)
2395 unsigned long offset = (unsigned long)dsi;
2396 struct btrfs_dev_stats_item *p;
2397 p = (struct btrfs_dev_stats_item *)(eb->data + offset);
2402 * this returns the number of bytes used by the item on disk, minus the
2403 * size of any extent headers. If a file is compressed on disk, this is
2404 * the compressed size
2406 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2407 struct btrfs_item *e)
2409 unsigned long offset;
2410 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2411 return btrfs_item_size(eb, e) - offset;
2414 /* struct btrfs_ioctl_search_header */
2415 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2417 return get_unaligned_64(&sh->transid);
2420 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2422 return get_unaligned_64(&sh->objectid);
2425 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2427 return get_unaligned_64(&sh->offset);
2430 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2432 return get_unaligned_32(&sh->type);
2435 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2437 return get_unaligned_32(&sh->len);
2440 /* this returns the number of file bytes represented by the inline item.
2441 * If an item is compressed, this is the uncompressed size
2443 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2445 struct btrfs_file_extent_item *fi)
2448 * return the space used on disk if this item isn't
2449 * compressed or encoded
2451 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2452 btrfs_file_extent_encryption(eb, fi) == 0 &&
2453 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2454 return btrfs_file_extent_inline_item_len(eb,
2455 btrfs_item_nr(slot));
2458 /* otherwise use the ram bytes field */
2459 return btrfs_file_extent_ram_bytes(eb, fi);
2462 #define btrfs_fs_incompat(fs_info, opt) \
2463 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
2465 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2467 struct btrfs_super_block *disk_super;
2468 disk_super = fs_info->super_copy;
2469 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2472 #define btrfs_fs_compat_ro(fs_info, opt) \
2473 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
2475 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2477 struct btrfs_super_block *disk_super;
2478 disk_super = fs_info->super_copy;
2479 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2482 /* helper function to cast into the data area of the leaf. */
2483 #define btrfs_item_ptr(leaf, slot, type) \
2484 ((type *)(btrfs_leaf_data(leaf) + \
2485 btrfs_item_offset_nr(leaf, slot)))
2487 #define btrfs_item_ptr_offset(leaf, slot) \
2488 ((unsigned long)(btrfs_leaf_data(leaf) + \
2489 btrfs_item_offset_nr(leaf, slot)))
2492 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2493 struct btrfs_root *root,
2494 u64 num_bytes, u64 empty_size,
2495 u64 hint_byte, u64 search_end,
2496 struct btrfs_key *ins, bool is_data);
2497 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2498 struct btrfs_root *root);
2499 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2500 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2501 u64 bytenr, u64 num_bytes);
2502 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2503 struct btrfs_root *root);
2504 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2505 btrfs_fs_info *info,
2507 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2508 btrfs_fs_info *info,
2510 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2511 struct btrfs_root *root,
2512 u32 blocksize, u64 root_objectid,
2513 struct btrfs_disk_key *key, int level,
2514 u64 hint, u64 empty_size);
2515 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2516 struct btrfs_root *root, u64 bytenr,
2517 u64 offset, int metadata, u64 *refs, u64 *flags);
2518 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2519 struct btrfs_root *root,
2520 u64 bytenr, int level, u64 flags);
2521 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2522 struct extent_buffer *buf, int record_parent);
2523 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2524 struct extent_buffer *buf, int record_parent);
2525 int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2526 struct btrfs_root *root,
2527 struct extent_buffer *buf,
2528 u64 parent, int last_ref);
2529 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2530 struct btrfs_root *root,
2531 u64 bytenr, u64 num_bytes, u64 parent,
2532 u64 root_objectid, u64 owner, u64 offset);
2533 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2534 struct btrfs_root *root,
2535 struct extent_io_tree *unpin);
2536 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2537 struct btrfs_root *root,
2538 u64 bytenr, u64 num_bytes, u64 parent,
2539 u64 root_objectid, u64 ref_generation,
2540 u64 owner_objectid);
2541 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2542 struct btrfs_root *root, u64 bytenr,
2543 u64 orig_parent, u64 parent,
2544 u64 root_objectid, u64 ref_generation,
2545 u64 owner_objectid);
2546 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2547 struct btrfs_root *root);
2548 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2549 int btrfs_read_block_groups(struct btrfs_root *root);
2550 struct btrfs_block_group_cache *
2551 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2552 u64 chunk_offset, u64 size);
2553 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2554 struct btrfs_fs_info *fs_info, u64 bytes_used,
2555 u64 type, u64 chunk_offset, u64 size);
2556 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2557 struct btrfs_fs_info *fs_info);
2558 int btrfs_update_block_group(struct btrfs_root *root, u64 bytenr, u64 num,
2559 int alloc, int mark_free);
2560 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2561 struct btrfs_root *root, u64 objectid,
2562 struct btrfs_inode_item *inode,
2563 u64 file_pos, u64 disk_bytenr,
2565 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2566 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2567 void free_excluded_extents(struct btrfs_root *root,
2568 struct btrfs_block_group_cache *cache);
2569 int exclude_super_stripes(struct btrfs_root *root,
2570 struct btrfs_block_group_cache *cache);
2571 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2572 struct btrfs_fs_info *info, u64 start, u64 end);
2573 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2576 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2577 int btrfs_del_ptr(struct btrfs_root *root, struct btrfs_path *path,
2578 int level, int slot);
2579 enum btrfs_tree_block_status
2580 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2581 struct extent_buffer *buf);
2582 enum btrfs_tree_block_status
2583 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2584 struct extent_buffer *buf);
2585 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2586 int level, int slot, u64 objectid);
2587 struct extent_buffer *read_node_slot(struct btrfs_fs_info *fs_info,
2588 struct extent_buffer *parent, int slot);
2589 int btrfs_previous_item(struct btrfs_root *root,
2590 struct btrfs_path *path, u64 min_objectid,
2592 int btrfs_previous_extent_item(struct btrfs_root *root,
2593 struct btrfs_path *path, u64 min_objectid);
2594 int btrfs_next_extent_item(struct btrfs_root *root,
2595 struct btrfs_path *path, u64 max_objectid);
2596 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2597 struct btrfs_root *root, struct extent_buffer *buf,
2598 struct extent_buffer *parent, int parent_slot,
2599 struct extent_buffer **cow_ret);
2600 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2601 struct btrfs_root *root,
2602 struct extent_buffer *buf,
2603 struct extent_buffer *parent, int parent_slot,
2604 struct extent_buffer **cow_ret,
2605 u64 search_start, u64 empty_size);
2606 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2607 struct btrfs_root *root,
2608 struct extent_buffer *buf,
2609 struct extent_buffer **cow_ret, u64 new_root_objectid);
2610 int btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
2612 int btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
2613 u32 new_size, int from_end);
2614 int btrfs_split_item(struct btrfs_trans_handle *trans,
2615 struct btrfs_root *root,
2616 struct btrfs_path *path,
2617 struct btrfs_key *new_key,
2618 unsigned long split_offset);
2619 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2620 *root, struct btrfs_key *key, struct btrfs_path *p, int
2622 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2623 u64 iobjectid, u64 ioff, u8 key_type,
2624 struct btrfs_key *found_key);
2625 void btrfs_release_path(struct btrfs_path *p);
2626 void add_root_to_dirty_list(struct btrfs_root *root);
2627 struct btrfs_path *btrfs_alloc_path(void);
2628 void btrfs_free_path(struct btrfs_path *p);
2629 void btrfs_init_path(struct btrfs_path *p);
2630 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2631 struct btrfs_path *path, int slot, int nr);
2633 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2634 struct btrfs_root *root,
2635 struct btrfs_path *path)
2637 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2640 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2641 *root, struct btrfs_key *key, void *data, u32 data_size);
2642 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2643 struct btrfs_root *root,
2644 struct btrfs_path *path,
2645 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2647 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2648 struct btrfs_root *root,
2649 struct btrfs_path *path,
2650 struct btrfs_key *key,
2653 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2656 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2657 static inline int btrfs_next_item(struct btrfs_root *root,
2658 struct btrfs_path *p)
2661 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2662 return btrfs_next_leaf(root, p);
2666 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2667 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2668 struct extent_buffer *leaf);
2669 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2670 struct btrfs_disk_key *key, int level);
2671 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2672 struct btrfs_key *new_key);
2673 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2674 struct btrfs_path *path,
2675 struct btrfs_key *new_key);
2678 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2679 struct btrfs_root *tree_root,
2680 u64 root_id, u8 type, u64 ref_id,
2681 u64 dirid, u64 sequence,
2682 const char *name, int name_len);
2683 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2684 *root, struct btrfs_key *key, struct btrfs_root_item
2686 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2687 struct btrfs_key *key);
2688 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2689 *root, struct btrfs_key *key, struct btrfs_root_item
2691 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2692 btrfs_root_item *item, struct btrfs_key *key);
2694 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2695 *root, const char *name, int name_len, u64 dir,
2696 struct btrfs_key *location, u8 type, u64 index);
2697 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2698 struct btrfs_root *root,
2699 struct btrfs_path *path, u64 dir,
2700 const char *name, int name_len,
2702 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2703 struct btrfs_root *root,
2704 struct btrfs_path *path, u64 dir,
2705 const char *name, int name_len,
2706 u64 index, int mod);
2707 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2708 struct btrfs_root *root,
2709 struct btrfs_path *path,
2710 struct btrfs_dir_item *di);
2711 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2712 struct btrfs_root *root, const char *name,
2713 u16 name_len, const void *data, u16 data_len,
2716 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2717 struct btrfs_root *fs_root,
2718 u64 dirid, u64 *objectid);
2721 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2722 struct btrfs_root *root,
2723 const char *name, int name_len,
2724 u64 inode_objectid, u64 ref_objectid, u64 index);
2725 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2726 *root, u64 objectid, struct btrfs_inode_item
2728 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2729 *root, struct btrfs_path *path,
2730 struct btrfs_key *location, int mod);
2731 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2732 *trans, struct btrfs_path *path, struct btrfs_root *root,
2733 u64 ino, u64 parent_ino, u64 index, const char *name,
2734 int namelen, int ins_len);
2735 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2736 struct btrfs_root *root,
2737 const char *name, int name_len,
2738 u64 inode_objectid, u64 ref_objectid,
2740 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2741 struct btrfs_root *root,
2742 const char *name, int name_len,
2743 u64 inode_objectid, u64 ref_objectid, u64 index);
2744 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2745 struct btrfs_root *root, struct btrfs_path *path,
2746 const char *name, int namelen, u64 ino, u64 parent_ino,
2748 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2749 struct btrfs_root *root, const char *name, int name_len,
2750 u64 ino, u64 parent_ino, u64 *index);
2753 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2754 struct btrfs_root *root, u64 bytenr, u64 len);
2755 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2756 struct btrfs_root *root,
2757 u64 objectid, u64 pos, u64 offset,
2760 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2761 struct btrfs_root *root, u64 objectid,
2762 u64 offset, const char *buffer, size_t size);
2763 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2764 struct btrfs_root *root, u64 alloc_end,
2765 u64 bytenr, char *data, size_t len);
2766 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2767 struct btrfs_root *root, struct btrfs_path *path,
2771 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2772 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2775 static inline int is_fstree(u64 rootid)
2777 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2778 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2784 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2785 u64 dir, u64 index);
2786 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2788 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2789 struct btrfs_root *root, u64 ino, u64 flags);
2790 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2791 u64 ino, u64 parent_ino, char *name, int namelen,
2792 u8 type, u64 *index, int add_backref, int ignore_existed);
2793 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2794 u64 ino, u64 parent_ino, u64 index, const char *name,
2795 int namelen, int add_orphan);
2796 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2797 struct btrfs_root *root, struct btrfs_path *path,
2799 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2800 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2801 struct btrfs_root *btrfs_mksubvol(struct btrfs_root *root, const char *base,
2802 u64 root_objectid, bool convert);
2805 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2806 struct btrfs_root *root,
2807 struct btrfs_path *path,
2808 u64 ino, u64 offset, u64 len, int ins_len);
2809 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2810 struct btrfs_root *root,
2811 u64 ino, u64 offset, u64 len);
2812 int btrfs_read_file(struct btrfs_root *root, u64 ino, u64 start, int len,