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, structures might be partially
51 #define BTRFS_MAGIC_PARTIAL 0x4D5F536652484221ULL /* ascii !BHRfS_M, no null */
53 #define BTRFS_MAX_MIRRORS 3
55 #define BTRFS_MAX_LEVEL 8
57 #define BTRFS_COMPAT_EXTENT_TREE_V0
59 /* holds pointers to all of the tree roots */
60 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
62 /* stores information about which extents are in use, and reference counts */
63 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
66 * chunk tree stores translations from logical -> physical block numbering
67 * the super block points to the chunk tree
69 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
72 * stores information about which areas of a given device are in use.
73 * one per device. The tree of tree roots points to the device tree
75 #define BTRFS_DEV_TREE_OBJECTID 4ULL
77 /* one per subvolume, storing files and directories */
78 #define BTRFS_FS_TREE_OBJECTID 5ULL
80 /* directory objectid inside the root tree */
81 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
82 /* holds checksums of all the data extents */
83 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
84 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
86 /* for storing items that use the BTRFS_UUID_KEY* */
87 #define BTRFS_UUID_TREE_OBJECTID 9ULL
89 /* tracks free space in block groups. */
90 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
92 /* device stats in the device tree */
93 #define BTRFS_DEV_STATS_OBJECTID 0ULL
95 /* for storing balance parameters in the root tree */
96 #define BTRFS_BALANCE_OBJECTID -4ULL
98 /* oprhan objectid for tracking unlinked/truncated files */
99 #define BTRFS_ORPHAN_OBJECTID -5ULL
101 /* does write ahead logging to speed up fsyncs */
102 #define BTRFS_TREE_LOG_OBJECTID -6ULL
103 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
105 /* space balancing */
106 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
107 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
110 * extent checksums all have this objectid
111 * this allows them to share the logging tree
114 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
116 /* For storing free space cache */
117 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
120 * The inode number assigned to the special inode for sotring
123 #define BTRFS_FREE_INO_OBJECTID -12ULL
125 /* dummy objectid represents multiple objectids */
126 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
129 * All files have objectids in this range.
131 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
132 #define BTRFS_LAST_FREE_OBJECTID -256ULL
133 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
138 * the device items go into the chunk tree. The key is in the form
139 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
141 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
143 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2ULL
146 * the max metadata block size. This limit is somewhat artificial,
147 * but the memmove costs go through the roof for larger blocks.
149 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
152 * we can actually store much bigger names, but lets not confuse the rest
155 #define BTRFS_NAME_LEN 255
158 * Theoretical limit is larger, but we keep this down to a sane
159 * value. That should limit greatly the possibility of collisions on
162 #define BTRFS_LINK_MAX 65535U
164 /* 32 bytes in various csum fields */
165 #define BTRFS_CSUM_SIZE 32
168 #define BTRFS_CSUM_TYPE_CRC32 0
170 static int btrfs_csum_sizes[] = { 4 };
172 /* four bytes for CRC32 */
173 #define BTRFS_CRC32_SIZE 4
174 #define BTRFS_EMPTY_DIR_SIZE 0
176 #define BTRFS_FT_UNKNOWN 0
177 #define BTRFS_FT_REG_FILE 1
178 #define BTRFS_FT_DIR 2
179 #define BTRFS_FT_CHRDEV 3
180 #define BTRFS_FT_BLKDEV 4
181 #define BTRFS_FT_FIFO 5
182 #define BTRFS_FT_SOCK 6
183 #define BTRFS_FT_SYMLINK 7
184 #define BTRFS_FT_XATTR 8
185 #define BTRFS_FT_MAX 9
187 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
190 * the key defines the order in the tree, and so it also defines (optimal)
191 * block layout. objectid corresponds to the inode number. The flags
192 * tells us things about the object, and is a kind of stream selector.
193 * so for a given inode, keys with flags of 1 might refer to the inode
194 * data, flags of 2 may point to file data in the btree and flags == 3
195 * may point to extents.
197 * offset is the starting byte offset for this key in the stream.
199 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
200 * in cpu native order. Otherwise they are identical and their sizes
201 * should be the same (ie both packed)
203 struct btrfs_disk_key {
207 } __attribute__ ((__packed__));
213 } __attribute__ ((__packed__));
215 struct btrfs_mapping_tree {
216 struct cache_tree cache_tree;
219 #define BTRFS_UUID_SIZE 16
220 struct btrfs_dev_item {
221 /* the internal btrfs device id */
224 /* size of the device */
230 /* optimal io alignment for this device */
233 /* optimal io width for this device */
236 /* minimal io size for this device */
239 /* type and info about this device */
242 /* expected generation for this device */
246 * starting byte of this partition on the device,
247 * to allow for stripe alignment in the future
251 /* grouping information for allocation decisions */
254 /* seek speed 0-100 where 100 is fastest */
257 /* bandwidth 0-100 where 100 is fastest */
260 /* btrfs generated uuid for this device */
261 u8 uuid[BTRFS_UUID_SIZE];
263 /* uuid of FS who owns this device */
264 u8 fsid[BTRFS_UUID_SIZE];
265 } __attribute__ ((__packed__));
267 struct btrfs_stripe {
270 u8 dev_uuid[BTRFS_UUID_SIZE];
271 } __attribute__ ((__packed__));
274 /* size of this chunk in bytes */
277 /* objectid of the root referencing this chunk */
283 /* optimal io alignment for this chunk */
286 /* optimal io width for this chunk */
289 /* minimal io size for this chunk */
292 /* 2^16 stripes is quite a lot, a second limit is the size of a single
297 /* sub stripes only matter for raid10 */
299 struct btrfs_stripe stripe;
300 /* additional stripes go here */
301 } __attribute__ ((__packed__));
303 #define BTRFS_FREE_SPACE_EXTENT 1
304 #define BTRFS_FREE_SPACE_BITMAP 2
306 struct btrfs_free_space_entry {
310 } __attribute__ ((__packed__));
312 struct btrfs_free_space_header {
313 struct btrfs_disk_key location;
317 } __attribute__ ((__packed__));
319 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
321 BUG_ON(num_stripes == 0);
322 return sizeof(struct btrfs_chunk) +
323 sizeof(struct btrfs_stripe) * (num_stripes - 1);
326 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
327 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
328 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
329 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
330 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
331 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
333 #define BTRFS_BACKREF_REV_MAX 256
334 #define BTRFS_BACKREF_REV_SHIFT 56
335 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
336 BTRFS_BACKREF_REV_SHIFT)
338 #define BTRFS_OLD_BACKREF_REV 0
339 #define BTRFS_MIXED_BACKREF_REV 1
342 * every tree block (leaf or node) starts with this header.
344 struct btrfs_header {
345 /* these first four must match the super block */
346 u8 csum[BTRFS_CSUM_SIZE];
347 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
348 __le64 bytenr; /* which block this node is supposed to live in */
351 /* allowed to be different from the super from here on down */
352 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
357 } __attribute__ ((__packed__));
359 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->fs_info->nodesize - \
360 sizeof(struct btrfs_header)) / \
361 sizeof(struct btrfs_key_ptr))
362 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
363 #define BTRFS_LEAF_DATA_SIZE(fs_info) \
364 (__BTRFS_LEAF_DATA_SIZE(fs_info->nodesize))
365 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r->fs_info) - \
366 sizeof(struct btrfs_item) - \
367 sizeof(struct btrfs_file_extent_item))
368 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r->fs_info) - \
369 sizeof(struct btrfs_item) -\
370 sizeof(struct btrfs_dir_item))
374 * this is a very generous portion of the super block, giving us
375 * room to translate 14 chunks with 3 stripes each.
377 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
378 #define BTRFS_LABEL_SIZE 256
381 * just in case we somehow lose the roots and are not able to mount,
382 * we store an array of the roots from previous transactions
385 #define BTRFS_NUM_BACKUP_ROOTS 4
386 struct btrfs_root_backup {
388 __le64 tree_root_gen;
391 __le64 chunk_root_gen;
394 __le64 extent_root_gen;
403 __le64 csum_root_gen;
413 u8 extent_root_level;
417 /* future and to align */
419 } __attribute__ ((__packed__));
422 * the super block basically lists the main trees of the FS
423 * it currently lacks any block count etc etc
425 struct btrfs_super_block {
426 u8 csum[BTRFS_CSUM_SIZE];
427 /* the first 3 fields must match struct btrfs_header */
428 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
429 __le64 bytenr; /* this block number */
432 /* allowed to be different from the btrfs_header from here own down */
439 /* this will help find the new super based on the log root */
440 __le64 log_root_transid;
443 __le64 root_dir_objectid;
447 /* Unused and must be equal to nodesize */
448 __le32 __unused_leafsize;
450 __le32 sys_chunk_array_size;
451 __le64 chunk_root_generation;
453 __le64 compat_ro_flags;
454 __le64 incompat_flags;
459 struct btrfs_dev_item dev_item;
461 char label[BTRFS_LABEL_SIZE];
463 __le64 cache_generation;
464 __le64 uuid_tree_generation;
466 /* future expansion */
468 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
469 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
470 } __attribute__ ((__packed__));
473 * Compat flags that we support. If any incompat flags are set other than the
474 * ones specified below then we will fail to mount
476 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
478 * Older kernels on big-endian systems produced broken free space tree bitmaps,
479 * and btrfs-progs also used to corrupt the free space tree. If this bit is
480 * clear, then the free space tree cannot be trusted. btrfs-progs can also
481 * intentionally clear this bit to ask the kernel to rebuild the free space
484 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
486 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
487 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
488 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
489 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
490 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)
493 * older kernels tried to do bigger metadata blocks, but the
494 * code was pretty buggy. Lets not let them try anymore.
496 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
497 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
498 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
499 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
500 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
502 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
505 * The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be
506 * added here until read-write support for the free space tree is implemented in
509 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
511 #define BTRFS_FEATURE_INCOMPAT_SUPP \
512 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
513 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
514 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
515 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
516 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
517 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
518 BTRFS_FEATURE_INCOMPAT_RAID56 | \
519 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
520 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
521 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
524 * A leaf is full of items. offset and size tell us where to find
525 * the item in the leaf (relative to the start of the data area)
528 struct btrfs_disk_key key;
531 } __attribute__ ((__packed__));
534 * leaves have an item area and a data area:
535 * [item0, item1....itemN] [free space] [dataN...data1, data0]
537 * The data is separate from the items to get the keys closer together
541 struct btrfs_header header;
542 struct btrfs_item items[];
543 } __attribute__ ((__packed__));
546 * all non-leaf blocks are nodes, they hold only keys and pointers to
549 struct btrfs_key_ptr {
550 struct btrfs_disk_key key;
553 } __attribute__ ((__packed__));
556 struct btrfs_header header;
557 struct btrfs_key_ptr ptrs[];
558 } __attribute__ ((__packed__));
561 * btrfs_paths remember the path taken from the root down to the leaf.
562 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
563 * to any other levels that are present.
565 * The slots array records the index of the item or block pointer
566 * used while walking the tree.
570 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
571 int slots[BTRFS_MAX_LEVEL];
573 /* The kernel locking sheme is not done in userspace. */
574 int locks[BTRFS_MAX_LEVEL];
577 /* keep some upper locks as we walk down */
581 * set by btrfs_split_item, tells search_slot to keep all locks
582 * and to force calls to keep space in the nodes
589 * items in the extent btree are used to record the objectid of the
590 * owner of the block and the number of references
593 struct btrfs_extent_item {
597 } __attribute__ ((__packed__));
599 struct btrfs_extent_item_v0 {
601 } __attribute__ ((__packed__));
603 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) \
604 ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
605 sizeof(struct btrfs_item))
606 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
608 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
609 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
611 /* following flags only apply to tree blocks */
613 /* use full backrefs for extent pointers in the block*/
614 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
616 struct btrfs_tree_block_info {
617 struct btrfs_disk_key key;
619 } __attribute__ ((__packed__));
621 struct btrfs_extent_data_ref {
626 } __attribute__ ((__packed__));
628 struct btrfs_shared_data_ref {
630 } __attribute__ ((__packed__));
632 struct btrfs_extent_inline_ref {
635 } __attribute__ ((__packed__));
637 struct btrfs_extent_ref_v0 {
642 } __attribute__ ((__packed__));
644 /* dev extents record free space on individual devices. The owner
645 * field points back to the chunk allocation mapping tree that allocated
646 * the extent. The chunk tree uuid field is a way to double check the owner
648 struct btrfs_dev_extent {
650 __le64 chunk_objectid;
653 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
654 } __attribute__ ((__packed__));
656 struct btrfs_inode_ref {
660 } __attribute__ ((__packed__));
662 struct btrfs_inode_extref {
663 __le64 parent_objectid;
666 __u8 name[0]; /* name goes here */
667 } __attribute__ ((__packed__));
669 struct btrfs_timespec {
672 } __attribute__ ((__packed__));
675 BTRFS_COMPRESS_NONE = 0,
676 BTRFS_COMPRESS_ZLIB = 1,
677 BTRFS_COMPRESS_LZO = 2,
678 BTRFS_COMPRESS_ZSTD = 3,
679 BTRFS_COMPRESS_TYPES = 3,
680 BTRFS_COMPRESS_LAST = 4,
681 } btrfs_compression_type;
683 /* we don't understand any encryption methods right now */
685 BTRFS_ENCRYPTION_NONE = 0,
686 BTRFS_ENCRYPTION_LAST = 1,
687 } btrfs_encryption_type;
689 enum btrfs_tree_block_status {
690 BTRFS_TREE_BLOCK_CLEAN,
691 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
692 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
693 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
694 BTRFS_TREE_BLOCK_INVALID_LEVEL,
695 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
696 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
699 struct btrfs_inode_item {
700 /* nfs style generation number */
702 /* transid that last touched this inode */
714 /* modification sequence number for NFS */
718 * a little future expansion, for more than this we can
719 * just grow the inode item and version it
722 struct btrfs_timespec atime;
723 struct btrfs_timespec ctime;
724 struct btrfs_timespec mtime;
725 struct btrfs_timespec otime;
726 } __attribute__ ((__packed__));
728 struct btrfs_dir_log_item {
730 } __attribute__ ((__packed__));
732 struct btrfs_dir_item {
733 struct btrfs_disk_key location;
738 } __attribute__ ((__packed__));
740 struct btrfs_root_item_v0 {
741 struct btrfs_inode_item inode;
747 __le64 last_snapshot;
750 struct btrfs_disk_key drop_progress;
753 } __attribute__ ((__packed__));
755 struct btrfs_root_item {
756 struct btrfs_inode_item inode;
762 __le64 last_snapshot;
765 struct btrfs_disk_key drop_progress;
770 * The following fields appear after subvol_uuids+subvol_times
775 * This generation number is used to test if the new fields are valid
776 * and up to date while reading the root item. Every time the root item
777 * is written out, the "generation" field is copied into this field. If
778 * anyone ever mounted the fs with an older kernel, we will have
779 * mismatching generation values here and thus must invalidate the
780 * new fields. See btrfs_update_root and btrfs_find_last_root for
782 * the offset of generation_v2 is also used as the start for the memset
783 * when invalidating the fields.
785 __le64 generation_v2;
786 u8 uuid[BTRFS_UUID_SIZE];
787 u8 parent_uuid[BTRFS_UUID_SIZE];
788 u8 received_uuid[BTRFS_UUID_SIZE];
789 __le64 ctransid; /* updated when an inode changes */
790 __le64 otransid; /* trans when created */
791 __le64 stransid; /* trans when sent. non-zero for received subvol */
792 __le64 rtransid; /* trans when received. non-zero for received subvol */
793 struct btrfs_timespec ctime;
794 struct btrfs_timespec otime;
795 struct btrfs_timespec stime;
796 struct btrfs_timespec rtime;
797 __le64 reserved[8]; /* for future */
798 } __attribute__ ((__packed__));
801 * this is used for both forward and backward root refs
803 struct btrfs_root_ref {
807 } __attribute__ ((__packed__));
809 struct btrfs_disk_balance_args {
811 * profiles to operate on, single is denoted by
812 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
818 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
819 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
832 /* devid subset filter [pstart..pend) */
836 /* btrfs virtual address space subset filter [vstart..vend) */
841 * profile to convert to, single is denoted by
842 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
846 /* BTRFS_BALANCE_ARGS_* */
850 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
851 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
863 * Process chunks that cross stripes_min..stripes_max devices,
864 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
870 } __attribute__ ((__packed__));
873 * store balance parameters to disk so that balance can be properly
874 * resumed after crash or unmount
876 struct btrfs_balance_item {
877 /* BTRFS_BALANCE_* */
880 struct btrfs_disk_balance_args data;
881 struct btrfs_disk_balance_args meta;
882 struct btrfs_disk_balance_args sys;
885 } __attribute__ ((__packed__));
887 #define BTRFS_FILE_EXTENT_INLINE 0
888 #define BTRFS_FILE_EXTENT_REG 1
889 #define BTRFS_FILE_EXTENT_PREALLOC 2
891 struct btrfs_file_extent_item {
893 * transaction id that created this extent
897 * max number of bytes to hold this extent in ram
898 * when we split a compressed extent we can't know how big
899 * each of the resulting pieces will be. So, this is
900 * an upper limit on the size of the extent in ram instead of
906 * 32 bits for the various ways we might encode the data,
907 * including compression and encryption. If any of these
908 * are set to something a given disk format doesn't understand
909 * it is treated like an incompat flag for reading and writing,
914 __le16 other_encoding; /* spare for later use */
916 /* are we inline data or a real extent? */
920 * disk space consumed by the extent, checksum blocks are included
924 __le64 disk_num_bytes;
926 * the logical offset in file blocks (no csums)
927 * this extent record is for. This allows a file extent to point
928 * into the middle of an existing extent on disk, sharing it
929 * between two snapshots (useful if some bytes in the middle of the
930 * extent have changed
934 * the logical number of file blocks (no csums included)
938 } __attribute__ ((__packed__));
940 struct btrfs_dev_stats_item {
942 * grow this item struct at the end for future enhancements and keep
943 * the existing values unchanged
945 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
946 } __attribute__ ((__packed__));
948 struct btrfs_csum_item {
950 } __attribute__ ((__packed__));
953 * We don't want to overwrite 1M at the beginning of device, even though
954 * there is our 1st superblock at 64k. Some possible reasons:
955 * - the first 64k blank is useful for some boot loader/manager
956 * - the first 1M could be scratched by buggy partitioner or somesuch
958 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)SZ_1M)
960 /* tag for the radix tree of block groups in ram */
961 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
962 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
963 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
964 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
965 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
966 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
967 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
968 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
969 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
970 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
971 #define BTRFS_NR_RAID_TYPES 7
973 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
974 BTRFS_BLOCK_GROUP_SYSTEM | \
975 BTRFS_BLOCK_GROUP_METADATA)
977 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
978 BTRFS_BLOCK_GROUP_RAID1 | \
979 BTRFS_BLOCK_GROUP_RAID5 | \
980 BTRFS_BLOCK_GROUP_RAID6 | \
981 BTRFS_BLOCK_GROUP_DUP | \
982 BTRFS_BLOCK_GROUP_RAID10)
984 /* used in struct btrfs_balance_args fields */
985 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
988 * GLOBAL_RSV does not exist as a on-disk block group type and is used
989 * internally for exporting info about global block reserve from space infos
991 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
993 #define BTRFS_QGROUP_LEVEL_SHIFT 48
995 static inline u64 btrfs_qgroup_level(u64 qgroupid)
997 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
1000 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
1002 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
1005 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1006 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1007 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1009 struct btrfs_qgroup_status_item {
1013 __le64 rescan; /* progress during scanning */
1014 } __attribute__ ((__packed__));
1016 struct btrfs_block_group_item {
1018 __le64 chunk_objectid;
1020 } __attribute__ ((__packed__));
1022 struct btrfs_free_space_info {
1023 __le32 extent_count;
1025 } __attribute__ ((__packed__));
1027 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1029 struct btrfs_qgroup_info_item {
1032 __le64 referenced_compressed;
1034 __le64 exclusive_compressed;
1035 } __attribute__ ((__packed__));
1037 /* flags definition for qgroup limits */
1038 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1039 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1040 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1041 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1042 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1043 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1045 struct btrfs_qgroup_limit_item {
1047 __le64 max_referenced;
1048 __le64 max_exclusive;
1049 __le64 rsv_referenced;
1050 __le64 rsv_exclusive;
1051 } __attribute__ ((__packed__));
1053 struct btrfs_space_info {
1059 struct list_head list;
1062 struct btrfs_block_group_cache {
1063 struct cache_extent cache;
1064 struct btrfs_key key;
1065 struct btrfs_block_group_item item;
1066 struct btrfs_space_info *space_info;
1067 struct btrfs_free_space_ctl *free_space_ctl;
1075 struct btrfs_device;
1076 struct btrfs_fs_devices;
1077 struct btrfs_fs_info {
1078 u8 fsid[BTRFS_FSID_SIZE];
1080 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1081 u8 *new_chunk_tree_uuid;
1082 struct btrfs_root *fs_root;
1083 struct btrfs_root *extent_root;
1084 struct btrfs_root *tree_root;
1085 struct btrfs_root *chunk_root;
1086 struct btrfs_root *dev_root;
1087 struct btrfs_root *csum_root;
1088 struct btrfs_root *quota_root;
1089 struct btrfs_root *free_space_root;
1091 struct rb_root fs_root_tree;
1093 /* the log root tree is a directory of all the other log roots */
1094 struct btrfs_root *log_root_tree;
1096 struct extent_io_tree extent_cache;
1097 struct extent_io_tree free_space_cache;
1098 struct extent_io_tree block_group_cache;
1099 struct extent_io_tree pinned_extents;
1100 struct extent_io_tree pending_del;
1101 struct extent_io_tree extent_ins;
1102 struct extent_io_tree *excluded_extents;
1104 /* logical->physical extent mapping */
1105 struct btrfs_mapping_tree mapping_tree;
1108 u64 last_trans_committed;
1110 u64 avail_data_alloc_bits;
1111 u64 avail_metadata_alloc_bits;
1112 u64 avail_system_alloc_bits;
1113 u64 data_alloc_profile;
1114 u64 metadata_alloc_profile;
1115 u64 system_alloc_profile;
1118 struct btrfs_trans_handle *running_transaction;
1119 struct btrfs_super_block *super_copy;
1120 struct mutex fs_mutex;
1125 struct list_head dirty_cowonly_roots;
1126 struct list_head recow_ebs;
1128 struct btrfs_fs_devices *fs_devices;
1129 struct list_head space_info;
1131 unsigned int system_allocs:1;
1132 unsigned int readonly:1;
1133 unsigned int on_restoring:1;
1134 unsigned int is_chunk_recover:1;
1135 unsigned int quota_enabled:1;
1136 unsigned int suppress_check_block_errors:1;
1137 unsigned int ignore_fsid_mismatch:1;
1138 unsigned int ignore_chunk_tree_error:1;
1139 unsigned int avoid_meta_chunk_alloc:1;
1140 unsigned int avoid_sys_chunk_alloc:1;
1141 unsigned int finalize_on_close:1;
1143 int transaction_aborted;
1145 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1146 struct btrfs_root *root,
1147 u64 bytenr, u64 num_bytes, u64 parent,
1148 u64 root_objectid, u64 owner, u64 offset,
1150 struct cache_tree *fsck_extent_cache;
1151 struct cache_tree *corrupt_blocks;
1153 /* Cached block sizes */
1160 * in ram representation of the tree. extent_root is used for all allocations
1161 * and for the extent tree extent_root root.
1164 struct extent_buffer *node;
1165 struct extent_buffer *commit_root;
1166 struct btrfs_root_item root_item;
1167 struct btrfs_key root_key;
1168 struct btrfs_fs_info *fs_info;
1177 u64 last_inode_alloc;
1180 * Record orphan data extent ref
1182 * TODO: Don't restore things in btrfs_root.
1183 * Directly record it into inode_record, which needs a lot of
1184 * infrastructure change to allow cooperation between extent
1187 struct list_head orphan_data_extents;
1189 /* the dirty list is only used by non-reference counted roots */
1190 struct list_head dirty_list;
1191 struct rb_node rb_node;
1195 * inode items have the data typically returned from stat and store other
1196 * info about object characteristics. There is one for every file and dir in
1199 #define BTRFS_INODE_ITEM_KEY 1
1200 #define BTRFS_INODE_REF_KEY 12
1201 #define BTRFS_INODE_EXTREF_KEY 13
1202 #define BTRFS_XATTR_ITEM_KEY 24
1203 #define BTRFS_ORPHAN_ITEM_KEY 48
1205 #define BTRFS_DIR_LOG_ITEM_KEY 60
1206 #define BTRFS_DIR_LOG_INDEX_KEY 72
1208 * dir items are the name -> inode pointers in a directory. There is one
1209 * for every name in a directory.
1211 #define BTRFS_DIR_ITEM_KEY 84
1212 #define BTRFS_DIR_INDEX_KEY 96
1215 * extent data is for file data
1217 #define BTRFS_EXTENT_DATA_KEY 108
1220 * csum items have the checksums for data in the extents
1222 #define BTRFS_CSUM_ITEM_KEY 120
1224 * extent csums are stored in a separate tree and hold csums for
1225 * an entire extent on disk.
1227 #define BTRFS_EXTENT_CSUM_KEY 128
1230 * root items point to tree roots. There are typically in the root
1231 * tree used by the super block to find all the other trees
1233 #define BTRFS_ROOT_ITEM_KEY 132
1236 * root backrefs tie subvols and snapshots to the directory entries that
1239 #define BTRFS_ROOT_BACKREF_KEY 144
1242 * root refs make a fast index for listing all of the snapshots and
1243 * subvolumes referenced by a given root. They point directly to the
1244 * directory item in the root that references the subvol
1246 #define BTRFS_ROOT_REF_KEY 156
1249 * extent items are in the extent map tree. These record which blocks
1250 * are used, and how many references there are to each block
1252 #define BTRFS_EXTENT_ITEM_KEY 168
1255 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1256 * the length, so we save the level in key->offset instead of the length.
1258 #define BTRFS_METADATA_ITEM_KEY 169
1260 #define BTRFS_TREE_BLOCK_REF_KEY 176
1262 #define BTRFS_EXTENT_DATA_REF_KEY 178
1264 /* old style extent backrefs */
1265 #define BTRFS_EXTENT_REF_V0_KEY 180
1267 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1269 #define BTRFS_SHARED_DATA_REF_KEY 184
1273 * block groups give us hints into the extent allocation trees. Which
1274 * blocks are free etc etc
1276 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1279 * Every block group is represented in the free space tree by a free space info
1280 * item, which stores some accounting information. It is keyed on
1281 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1283 #define BTRFS_FREE_SPACE_INFO_KEY 198
1286 * A free space extent tracks an extent of space that is free in a block group.
1287 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1289 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1292 * When a block group becomes very fragmented, we convert it to use bitmaps
1293 * instead of extents. A free space bitmap is keyed on
1294 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1295 * (length / sectorsize) bits.
1297 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1299 #define BTRFS_DEV_EXTENT_KEY 204
1300 #define BTRFS_DEV_ITEM_KEY 216
1301 #define BTRFS_CHUNK_ITEM_KEY 228
1303 #define BTRFS_BALANCE_ITEM_KEY 248
1308 #define BTRFS_QGROUP_STATUS_KEY 240
1309 #define BTRFS_QGROUP_INFO_KEY 242
1310 #define BTRFS_QGROUP_LIMIT_KEY 244
1311 #define BTRFS_QGROUP_RELATION_KEY 246
1314 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1316 #define BTRFS_BALANCE_ITEM_KEY 248
1319 * The key type for tree items that are stored persistently, but do not need to
1320 * exist for extended period of time. The items can exist in any tree.
1322 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1326 * - balance status item
1327 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1329 #define BTRFS_TEMPORARY_ITEM_KEY 248
1332 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1334 #define BTRFS_DEV_STATS_KEY 249
1337 * The key type for tree items that are stored persistently and usually exist
1338 * for a long period, eg. filesystem lifetime. The item kinds can be status
1339 * information, stats or preference values. The item can exist in any tree.
1341 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1345 * - device statistics, store IO stats in the device tree, one key for all
1347 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1349 #define BTRFS_PERSISTENT_ITEM_KEY 249
1352 * Persistently stores the device replace state in the device tree.
1353 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1355 #define BTRFS_DEV_REPLACE_KEY 250
1358 * Stores items that allow to quickly map UUIDs to something else.
1359 * These items are part of the filesystem UUID tree.
1360 * The key is built like this:
1361 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1363 #if BTRFS_UUID_SIZE != 16
1364 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1366 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1367 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1368 * received subvols */
1371 * string items are for debugging. They just store a short string of
1374 #define BTRFS_STRING_ITEM_KEY 253
1378 #define BTRFS_INODE_NODATASUM (1 << 0)
1379 #define BTRFS_INODE_NODATACOW (1 << 1)
1380 #define BTRFS_INODE_READONLY (1 << 2)
1381 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1382 #define BTRFS_INODE_PREALLOC (1 << 4)
1383 #define BTRFS_INODE_SYNC (1 << 5)
1384 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1385 #define BTRFS_INODE_APPEND (1 << 7)
1386 #define BTRFS_INODE_NODUMP (1 << 8)
1387 #define BTRFS_INODE_NOATIME (1 << 9)
1388 #define BTRFS_INODE_DIRSYNC (1 << 10)
1389 #define BTRFS_INODE_COMPRESS (1 << 11)
1391 #define read_eb_member(eb, ptr, type, member, result) ( \
1392 read_extent_buffer(eb, (char *)(result), \
1393 ((unsigned long)(ptr)) + \
1394 offsetof(type, member), \
1395 sizeof(((type *)0)->member)))
1397 #define write_eb_member(eb, ptr, type, member, result) ( \
1398 write_extent_buffer(eb, (char *)(result), \
1399 ((unsigned long)(ptr)) + \
1400 offsetof(type, member), \
1401 sizeof(((type *)0)->member)))
1403 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1404 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1406 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1407 return le##bits##_to_cpu(h->member); \
1409 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1412 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1413 h->member = cpu_to_le##bits(val); \
1416 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1417 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1420 unsigned long offset = (unsigned long)s; \
1421 const type *p = (type *) (eb->data + offset); \
1422 return get_unaligned_le##bits(&p->member); \
1424 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1425 type *s, u##bits val) \
1427 unsigned long offset = (unsigned long)s; \
1428 type *p = (type *) (eb->data + offset); \
1429 put_unaligned_le##bits(val, &p->member); \
1432 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1433 static inline u##bits btrfs_##name(const type *s) \
1435 return le##bits##_to_cpu(s->member); \
1437 static inline void btrfs_set_##name(type *s, u##bits val) \
1439 s->member = cpu_to_le##bits(val); \
1442 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1443 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1444 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1445 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1446 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1447 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1449 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1450 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1451 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1452 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1453 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1454 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1456 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1457 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1459 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1461 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1463 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1465 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1467 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1468 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1470 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1472 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1474 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1477 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1479 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1482 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1484 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1487 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1488 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1489 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1490 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1491 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1492 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1493 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1494 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1495 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1496 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1497 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1499 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1501 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1504 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1505 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1506 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1508 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1510 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1512 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1514 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1515 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1517 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1519 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1520 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1522 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1525 unsigned long offset = (unsigned long)c;
1526 offset += offsetof(struct btrfs_chunk, stripe);
1527 offset += nr * sizeof(struct btrfs_stripe);
1528 return (struct btrfs_stripe *)offset;
1531 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1533 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1536 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1537 struct btrfs_chunk *c, int nr)
1539 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1542 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1543 struct btrfs_chunk *c, int nr,
1546 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1549 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1550 struct btrfs_chunk *c, int nr)
1552 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1555 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1556 struct btrfs_chunk *c, int nr,
1559 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1562 /* struct btrfs_block_group_item */
1563 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1565 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1567 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1568 struct btrfs_block_group_item, chunk_objectid, 64);
1570 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1571 struct btrfs_block_group_item, chunk_objectid, 64);
1572 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1573 struct btrfs_block_group_item, flags, 64);
1574 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1575 struct btrfs_block_group_item, flags, 64);
1577 /* struct btrfs_free_space_info */
1578 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1580 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1582 /* struct btrfs_inode_ref */
1583 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1584 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1585 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1587 /* struct btrfs_inode_extref */
1588 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1589 parent_objectid, 64);
1590 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1592 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1594 /* struct btrfs_inode_item */
1595 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1596 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1597 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1598 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1599 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1600 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1601 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1602 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1603 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1604 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1605 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1606 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1608 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1609 struct btrfs_inode_item, generation, 64);
1610 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1611 struct btrfs_inode_item, sequence, 64);
1612 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1613 struct btrfs_inode_item, transid, 64);
1614 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1615 struct btrfs_inode_item, size, 64);
1616 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1617 struct btrfs_inode_item, nbytes, 64);
1618 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1619 struct btrfs_inode_item, block_group, 64);
1620 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1621 struct btrfs_inode_item, nlink, 32);
1622 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1623 struct btrfs_inode_item, uid, 32);
1624 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1625 struct btrfs_inode_item, gid, 32);
1626 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1627 struct btrfs_inode_item, mode, 32);
1628 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1629 struct btrfs_inode_item, rdev, 64);
1630 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1631 struct btrfs_inode_item, flags, 64);
1633 static inline struct btrfs_timespec *
1634 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1636 unsigned long ptr = (unsigned long)inode_item;
1637 ptr += offsetof(struct btrfs_inode_item, atime);
1638 return (struct btrfs_timespec *)ptr;
1641 static inline struct btrfs_timespec *
1642 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1644 unsigned long ptr = (unsigned long)inode_item;
1645 ptr += offsetof(struct btrfs_inode_item, mtime);
1646 return (struct btrfs_timespec *)ptr;
1649 static inline struct btrfs_timespec *
1650 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1652 unsigned long ptr = (unsigned long)inode_item;
1653 ptr += offsetof(struct btrfs_inode_item, ctime);
1654 return (struct btrfs_timespec *)ptr;
1657 static inline struct btrfs_timespec *
1658 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1660 unsigned long ptr = (unsigned long)inode_item;
1661 ptr += offsetof(struct btrfs_inode_item, otime);
1662 return (struct btrfs_timespec *)ptr;
1665 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1666 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1667 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1669 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1672 /* struct btrfs_dev_extent */
1673 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1675 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1676 chunk_objectid, 64);
1677 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1679 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1681 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1684 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1686 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1687 return (u8 *)((unsigned long)dev + ptr);
1691 /* struct btrfs_extent_item */
1692 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1693 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1694 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1696 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1697 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1699 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1701 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1703 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1704 struct btrfs_tree_block_info *item,
1705 struct btrfs_disk_key *key)
1707 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1710 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1711 struct btrfs_tree_block_info *item,
1712 struct btrfs_disk_key *key)
1714 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1717 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1719 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1721 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1723 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1726 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1729 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1731 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1733 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1734 struct btrfs_extent_inline_ref, type, 8);
1735 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1736 struct btrfs_extent_inline_ref, offset, 64);
1738 static inline u32 btrfs_extent_inline_ref_size(int type)
1740 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1741 type == BTRFS_SHARED_BLOCK_REF_KEY)
1742 return sizeof(struct btrfs_extent_inline_ref);
1743 if (type == BTRFS_SHARED_DATA_REF_KEY)
1744 return sizeof(struct btrfs_shared_data_ref) +
1745 sizeof(struct btrfs_extent_inline_ref);
1746 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1747 return sizeof(struct btrfs_extent_data_ref) +
1748 offsetof(struct btrfs_extent_inline_ref, offset);
1753 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1754 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1756 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1757 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1759 /* struct btrfs_node */
1760 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1761 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1763 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1766 ptr = offsetof(struct btrfs_node, ptrs) +
1767 sizeof(struct btrfs_key_ptr) * nr;
1768 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1771 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1775 ptr = offsetof(struct btrfs_node, ptrs) +
1776 sizeof(struct btrfs_key_ptr) * nr;
1777 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1780 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1783 ptr = offsetof(struct btrfs_node, ptrs) +
1784 sizeof(struct btrfs_key_ptr) * nr;
1785 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1788 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1792 ptr = offsetof(struct btrfs_node, ptrs) +
1793 sizeof(struct btrfs_key_ptr) * nr;
1794 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1797 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1799 return offsetof(struct btrfs_node, ptrs) +
1800 sizeof(struct btrfs_key_ptr) * nr;
1803 static inline void btrfs_node_key(struct extent_buffer *eb,
1804 struct btrfs_disk_key *disk_key, int nr)
1807 ptr = btrfs_node_key_ptr_offset(nr);
1808 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1809 struct btrfs_key_ptr, key, disk_key);
1812 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1813 struct btrfs_disk_key *disk_key, int nr)
1816 ptr = btrfs_node_key_ptr_offset(nr);
1817 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1818 struct btrfs_key_ptr, key, disk_key);
1821 /* struct btrfs_item */
1822 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1823 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1825 static inline unsigned long btrfs_item_nr_offset(int nr)
1827 return offsetof(struct btrfs_leaf, items) +
1828 sizeof(struct btrfs_item) * nr;
1831 static inline struct btrfs_item *btrfs_item_nr(int nr)
1833 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1836 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1837 struct btrfs_item *item)
1839 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1842 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1844 return btrfs_item_end(eb, btrfs_item_nr(nr));
1847 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1849 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1852 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1854 return btrfs_item_size(eb, btrfs_item_nr(nr));
1857 static inline void btrfs_item_key(struct extent_buffer *eb,
1858 struct btrfs_disk_key *disk_key, int nr)
1860 struct btrfs_item *item = btrfs_item_nr(nr);
1861 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1864 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1865 struct btrfs_disk_key *disk_key, int nr)
1867 struct btrfs_item *item = btrfs_item_nr(nr);
1868 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1871 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1874 * struct btrfs_root_ref
1876 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1877 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1878 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1880 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1881 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1882 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1884 /* struct btrfs_dir_item */
1885 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1886 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1887 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1888 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1890 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1891 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1892 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1893 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1895 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1896 struct btrfs_dir_item *item,
1897 struct btrfs_disk_key *key)
1899 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1902 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1903 struct btrfs_dir_item *item,
1904 struct btrfs_disk_key *key)
1906 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1909 /* struct btrfs_free_space_header */
1910 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1912 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1914 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1917 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1918 struct btrfs_free_space_header *h,
1919 struct btrfs_disk_key *key)
1921 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1924 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1925 struct btrfs_free_space_header *h,
1926 struct btrfs_disk_key *key)
1928 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1931 /* struct btrfs_disk_key */
1932 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1934 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1935 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1937 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1938 struct btrfs_disk_key *disk)
1940 cpu->offset = le64_to_cpu(disk->offset);
1941 cpu->type = disk->type;
1942 cpu->objectid = le64_to_cpu(disk->objectid);
1945 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1946 struct btrfs_key *cpu)
1948 disk->offset = cpu_to_le64(cpu->offset);
1949 disk->type = cpu->type;
1950 disk->objectid = cpu_to_le64(cpu->objectid);
1953 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1954 struct btrfs_key *key, int nr)
1956 struct btrfs_disk_key disk_key;
1957 btrfs_node_key(eb, &disk_key, nr);
1958 btrfs_disk_key_to_cpu(key, &disk_key);
1961 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1962 struct btrfs_key *key, int nr)
1964 struct btrfs_disk_key disk_key;
1965 btrfs_item_key(eb, &disk_key, nr);
1966 btrfs_disk_key_to_cpu(key, &disk_key);
1969 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1970 struct btrfs_dir_item *item,
1971 struct btrfs_key *key)
1973 struct btrfs_disk_key disk_key;
1974 btrfs_dir_item_key(eb, item, &disk_key);
1975 btrfs_disk_key_to_cpu(key, &disk_key);
1978 /* struct btrfs_header */
1979 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1980 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1982 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1983 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1984 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1985 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1986 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1987 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1989 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1990 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1993 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1995 return (btrfs_header_flags(eb) & flag) == flag;
1998 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2000 u64 flags = btrfs_header_flags(eb);
2001 btrfs_set_header_flags(eb, flags | flag);
2002 return (flags & flag) == flag;
2005 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2007 u64 flags = btrfs_header_flags(eb);
2008 btrfs_set_header_flags(eb, flags & ~flag);
2009 return (flags & flag) == flag;
2012 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2014 u64 flags = btrfs_header_flags(eb);
2015 return flags >> BTRFS_BACKREF_REV_SHIFT;
2018 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2021 u64 flags = btrfs_header_flags(eb);
2022 flags &= ~BTRFS_BACKREF_REV_MASK;
2023 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2024 btrfs_set_header_flags(eb, flags);
2027 static inline unsigned long btrfs_header_fsid(void)
2029 return offsetof(struct btrfs_header, fsid);
2032 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2034 return offsetof(struct btrfs_header, chunk_tree_uuid);
2037 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
2039 unsigned long ptr = offsetof(struct btrfs_header, csum);
2043 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2045 return (btrfs_header_level(eb) == 0);
2048 /* struct btrfs_root_item */
2049 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2051 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2052 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2053 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2055 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2057 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2058 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2059 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2060 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2061 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2062 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2063 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2064 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2066 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2068 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2070 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2072 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2074 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2077 static inline struct btrfs_timespec* btrfs_root_ctime(
2078 struct btrfs_root_item *root_item)
2080 unsigned long ptr = (unsigned long)root_item;
2081 ptr += offsetof(struct btrfs_root_item, ctime);
2082 return (struct btrfs_timespec *)ptr;
2085 static inline struct btrfs_timespec* btrfs_root_otime(
2086 struct btrfs_root_item *root_item)
2088 unsigned long ptr = (unsigned long)root_item;
2089 ptr += offsetof(struct btrfs_root_item, otime);
2090 return (struct btrfs_timespec *)ptr;
2093 static inline struct btrfs_timespec* btrfs_root_stime(
2094 struct btrfs_root_item *root_item)
2096 unsigned long ptr = (unsigned long)root_item;
2097 ptr += offsetof(struct btrfs_root_item, stime);
2098 return (struct btrfs_timespec *)ptr;
2101 static inline struct btrfs_timespec* btrfs_root_rtime(
2102 struct btrfs_root_item *root_item)
2104 unsigned long ptr = (unsigned long)root_item;
2105 ptr += offsetof(struct btrfs_root_item, rtime);
2106 return (struct btrfs_timespec *)ptr;
2109 /* struct btrfs_root_backup */
2110 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2112 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2114 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2115 tree_root_level, 8);
2117 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2119 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2120 chunk_root_gen, 64);
2121 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2122 chunk_root_level, 8);
2124 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2126 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2127 extent_root_gen, 64);
2128 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2129 extent_root_level, 8);
2131 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2133 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2135 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2138 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2140 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2142 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2145 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2147 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2149 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2150 csum_root_level, 8);
2151 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2153 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2155 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2158 /* struct btrfs_super_block */
2160 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2161 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2162 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2164 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2165 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2166 struct btrfs_super_block, sys_chunk_array_size, 32);
2167 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2168 struct btrfs_super_block, chunk_root_generation, 64);
2169 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2171 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2173 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2174 chunk_root_level, 8);
2175 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2177 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2178 log_root_transid, 64);
2179 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2181 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2183 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2185 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2187 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2189 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2191 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2192 root_dir_objectid, 64);
2193 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2195 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2197 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2198 compat_ro_flags, 64);
2199 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2200 incompat_flags, 64);
2201 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2203 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2204 cache_generation, 64);
2205 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2206 uuid_tree_generation, 64);
2207 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2209 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2211 int t = btrfs_super_csum_type(s);
2212 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2213 return btrfs_csum_sizes[t];
2216 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2218 return offsetof(struct btrfs_leaf, items);
2221 /* struct btrfs_file_extent_item */
2222 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2223 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2225 static inline unsigned long btrfs_file_extent_inline_start(struct
2226 btrfs_file_extent_item *e)
2228 unsigned long offset = (unsigned long)e;
2229 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2233 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2235 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2238 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2240 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2242 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2244 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2246 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2247 disk_num_bytes, 64);
2248 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2250 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2252 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2254 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2256 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2258 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2260 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2262 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2264 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2266 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2267 other_encoding, 16);
2269 /* btrfs_qgroup_status_item */
2270 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2272 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2274 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2276 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2279 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2280 struct btrfs_qgroup_status_item, version, 64);
2281 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2282 struct btrfs_qgroup_status_item, generation, 64);
2283 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2284 struct btrfs_qgroup_status_item, flags, 64);
2285 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2286 struct btrfs_qgroup_status_item, rescan, 64);
2288 /* btrfs_qgroup_info_item */
2289 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2291 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2293 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2294 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2295 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2297 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2298 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2300 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2301 struct btrfs_qgroup_info_item, generation, 64);
2302 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2303 struct btrfs_qgroup_info_item, referenced, 64);
2304 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2305 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2306 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2307 struct btrfs_qgroup_info_item, exclusive, 64);
2308 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2309 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2311 /* btrfs_qgroup_limit_item */
2312 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2314 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2315 max_referenced, 64);
2316 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2318 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2319 rsv_referenced, 64);
2320 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2323 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2324 struct btrfs_qgroup_limit_item, flags, 64);
2325 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2326 struct btrfs_qgroup_limit_item, max_referenced, 64);
2327 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2328 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2329 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2330 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2331 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2332 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2334 /* btrfs_balance_item */
2335 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
2337 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
2338 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2340 unsigned long offset = (unsigned long)bi;
2341 struct btrfs_balance_item *p;
2342 p = (struct btrfs_balance_item *)(eb->data + offset);
2346 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
2347 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2349 unsigned long offset = (unsigned long)bi;
2350 struct btrfs_balance_item *p;
2351 p = (struct btrfs_balance_item *)(eb->data + offset);
2355 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
2356 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2358 unsigned long offset = (unsigned long)bi;
2359 struct btrfs_balance_item *p;
2360 p = (struct btrfs_balance_item *)(eb->data + offset);
2365 * btrfs_dev_stats_item helper, returns pointer to the raw array, do the
2366 * endiannes conversion, @dsi is offset to eb data
2368 static inline __le64* btrfs_dev_stats_values(struct extent_buffer *eb,
2369 struct btrfs_dev_stats_item *dsi)
2371 unsigned long offset = (unsigned long)dsi;
2372 struct btrfs_dev_stats_item *p;
2373 p = (struct btrfs_dev_stats_item *)(eb->data + offset);
2378 * this returns the number of bytes used by the item on disk, minus the
2379 * size of any extent headers. If a file is compressed on disk, this is
2380 * the compressed size
2382 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2383 struct btrfs_item *e)
2385 unsigned long offset;
2386 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2387 return btrfs_item_size(eb, e) - offset;
2390 /* struct btrfs_ioctl_search_header */
2391 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2393 return get_unaligned_64(&sh->transid);
2396 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2398 return get_unaligned_64(&sh->objectid);
2401 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2403 return get_unaligned_64(&sh->offset);
2406 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2408 return get_unaligned_32(&sh->type);
2411 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2413 return get_unaligned_32(&sh->len);
2416 /* this returns the number of file bytes represented by the inline item.
2417 * If an item is compressed, this is the uncompressed size
2419 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2421 struct btrfs_file_extent_item *fi)
2424 * return the space used on disk if this item isn't
2425 * compressed or encoded
2427 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2428 btrfs_file_extent_encryption(eb, fi) == 0 &&
2429 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2430 return btrfs_file_extent_inline_item_len(eb,
2431 btrfs_item_nr(slot));
2434 /* otherwise use the ram bytes field */
2435 return btrfs_file_extent_ram_bytes(eb, fi);
2438 #define btrfs_fs_incompat(fs_info, opt) \
2439 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
2441 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2443 struct btrfs_super_block *disk_super;
2444 disk_super = fs_info->super_copy;
2445 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2448 #define btrfs_fs_compat_ro(fs_info, opt) \
2449 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
2451 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2453 struct btrfs_super_block *disk_super;
2454 disk_super = fs_info->super_copy;
2455 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2458 /* helper function to cast into the data area of the leaf. */
2459 #define btrfs_item_ptr(leaf, slot, type) \
2460 ((type *)(btrfs_leaf_data(leaf) + \
2461 btrfs_item_offset_nr(leaf, slot)))
2463 #define btrfs_item_ptr_offset(leaf, slot) \
2464 ((unsigned long)(btrfs_leaf_data(leaf) + \
2465 btrfs_item_offset_nr(leaf, slot)))
2468 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2469 struct btrfs_root *root,
2470 u64 num_bytes, u64 empty_size,
2471 u64 hint_byte, u64 search_end,
2472 struct btrfs_key *ins, bool is_data);
2473 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2474 struct btrfs_root *root);
2475 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2476 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2477 u64 bytenr, u64 num_bytes);
2478 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2479 struct btrfs_root *root);
2480 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2481 btrfs_fs_info *info,
2483 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2484 btrfs_fs_info *info,
2486 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2487 struct btrfs_root *root,
2488 u32 blocksize, u64 root_objectid,
2489 struct btrfs_disk_key *key, int level,
2490 u64 hint, u64 empty_size);
2491 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2492 struct btrfs_root *root,
2493 u64 num_bytes, u64 parent,
2494 u64 root_objectid, u64 ref_generation,
2495 u64 owner, u64 empty_size, u64 hint_byte,
2496 u64 search_end, struct btrfs_key *ins, int data);
2497 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2498 struct btrfs_root *root, u64 bytenr,
2499 u64 offset, int metadata, u64 *refs, u64 *flags);
2500 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2501 struct btrfs_root *root,
2502 u64 bytenr, int level, u64 flags);
2503 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2504 struct extent_buffer *buf, int record_parent);
2505 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2506 struct extent_buffer *buf, int record_parent);
2507 int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2508 struct btrfs_root *root,
2509 struct extent_buffer *buf,
2510 u64 parent, int last_ref);
2511 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2512 struct btrfs_root *root,
2513 u64 bytenr, u64 num_bytes, u64 parent,
2514 u64 root_objectid, u64 owner, u64 offset);
2515 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2516 struct btrfs_root *root,
2517 struct extent_io_tree *unpin);
2518 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2519 struct btrfs_root *root,
2520 u64 bytenr, u64 num_bytes, u64 parent,
2521 u64 root_objectid, u64 ref_generation,
2522 u64 owner_objectid);
2523 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2524 struct btrfs_root *root, u64 bytenr,
2525 u64 orig_parent, u64 parent,
2526 u64 root_objectid, u64 ref_generation,
2527 u64 owner_objectid);
2528 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2529 struct btrfs_root *root);
2530 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2531 int btrfs_read_block_groups(struct btrfs_root *root);
2532 struct btrfs_block_group_cache *
2533 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2534 u64 chunk_offset, u64 size);
2535 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2536 struct btrfs_fs_info *fs_info, u64 bytes_used,
2537 u64 type, u64 chunk_offset, u64 size);
2538 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2539 struct btrfs_fs_info *fs_info);
2540 int btrfs_update_block_group(struct btrfs_root *root, u64 bytenr, u64 num,
2541 int alloc, int mark_free);
2542 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2543 struct btrfs_root *root, u64 objectid,
2544 struct btrfs_inode_item *inode,
2545 u64 file_pos, u64 disk_bytenr,
2547 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2548 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2549 void free_excluded_extents(struct btrfs_root *root,
2550 struct btrfs_block_group_cache *cache);
2551 int exclude_super_stripes(struct btrfs_root *root,
2552 struct btrfs_block_group_cache *cache);
2553 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2554 struct btrfs_fs_info *info, u64 start, u64 end);
2555 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2558 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2559 int btrfs_del_ptr(struct btrfs_root *root, struct btrfs_path *path,
2560 int level, int slot);
2561 enum btrfs_tree_block_status
2562 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2563 struct extent_buffer *buf);
2564 enum btrfs_tree_block_status
2565 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2566 struct extent_buffer *buf);
2567 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2568 int level, int slot, u64 objectid);
2569 struct extent_buffer *read_node_slot(struct btrfs_fs_info *fs_info,
2570 struct extent_buffer *parent, int slot);
2571 int btrfs_previous_item(struct btrfs_root *root,
2572 struct btrfs_path *path, u64 min_objectid,
2574 int btrfs_previous_extent_item(struct btrfs_root *root,
2575 struct btrfs_path *path, u64 min_objectid);
2576 int btrfs_next_extent_item(struct btrfs_root *root,
2577 struct btrfs_path *path, u64 max_objectid);
2578 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2579 struct btrfs_root *root, struct extent_buffer *buf,
2580 struct extent_buffer *parent, int parent_slot,
2581 struct extent_buffer **cow_ret);
2582 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2583 struct btrfs_root *root,
2584 struct extent_buffer *buf,
2585 struct extent_buffer *parent, int parent_slot,
2586 struct extent_buffer **cow_ret,
2587 u64 search_start, u64 empty_size);
2588 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2589 struct btrfs_root *root,
2590 struct extent_buffer *buf,
2591 struct extent_buffer **cow_ret, u64 new_root_objectid);
2592 int btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
2594 int btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
2595 u32 new_size, int from_end);
2596 int btrfs_split_item(struct btrfs_trans_handle *trans,
2597 struct btrfs_root *root,
2598 struct btrfs_path *path,
2599 struct btrfs_key *new_key,
2600 unsigned long split_offset);
2601 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2602 *root, struct btrfs_key *key, struct btrfs_path *p, int
2604 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2605 u64 iobjectid, u64 ioff, u8 key_type,
2606 struct btrfs_key *found_key);
2607 void btrfs_release_path(struct btrfs_path *p);
2608 void add_root_to_dirty_list(struct btrfs_root *root);
2609 struct btrfs_path *btrfs_alloc_path(void);
2610 void btrfs_free_path(struct btrfs_path *p);
2611 void btrfs_init_path(struct btrfs_path *p);
2612 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2613 struct btrfs_path *path, int slot, int nr);
2615 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2616 struct btrfs_root *root,
2617 struct btrfs_path *path)
2619 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2622 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2623 *root, struct btrfs_key *key, void *data, u32 data_size);
2624 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2625 struct btrfs_root *root,
2626 struct btrfs_path *path,
2627 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2629 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2630 struct btrfs_root *root,
2631 struct btrfs_path *path,
2632 struct btrfs_key *key,
2635 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2638 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2639 static inline int btrfs_next_item(struct btrfs_root *root,
2640 struct btrfs_path *p)
2643 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2644 return btrfs_next_leaf(root, p);
2648 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2649 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2650 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2651 struct btrfs_disk_key *key, int level);
2652 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2653 struct btrfs_key *new_key);
2654 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2655 struct btrfs_path *path,
2656 struct btrfs_key *new_key);
2659 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2660 struct btrfs_root *tree_root,
2661 u64 root_id, u8 type, u64 ref_id,
2662 u64 dirid, u64 sequence,
2663 const char *name, int name_len);
2664 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2665 *root, struct btrfs_key *key, struct btrfs_root_item
2667 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2668 struct btrfs_key *key);
2669 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2670 *root, struct btrfs_key *key, struct btrfs_root_item
2672 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2673 btrfs_root_item *item, struct btrfs_key *key);
2675 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2676 *root, const char *name, int name_len, u64 dir,
2677 struct btrfs_key *location, u8 type, u64 index);
2678 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2679 struct btrfs_root *root,
2680 struct btrfs_path *path, u64 dir,
2681 const char *name, int name_len,
2683 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2684 struct btrfs_root *root,
2685 struct btrfs_path *path, u64 dir,
2686 const char *name, int name_len,
2687 u64 index, int mod);
2688 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2689 struct btrfs_root *root,
2690 struct btrfs_path *path,
2691 struct btrfs_dir_item *di);
2692 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2693 struct btrfs_root *root, const char *name,
2694 u16 name_len, const void *data, u16 data_len,
2697 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2698 struct btrfs_root *fs_root,
2699 u64 dirid, u64 *objectid);
2702 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2703 struct btrfs_root *root,
2704 const char *name, int name_len,
2705 u64 inode_objectid, u64 ref_objectid, u64 index);
2706 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2707 *root, u64 objectid, struct btrfs_inode_item
2709 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2710 *root, struct btrfs_path *path,
2711 struct btrfs_key *location, int mod);
2712 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2713 *trans, struct btrfs_path *path, struct btrfs_root *root,
2714 u64 ino, u64 parent_ino, u64 index, const char *name,
2715 int namelen, int ins_len);
2716 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2717 struct btrfs_root *root,
2718 const char *name, int name_len,
2719 u64 inode_objectid, u64 ref_objectid,
2721 int btrfs_insert_inode_extref(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 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2726 struct btrfs_root *root, struct btrfs_path *path,
2727 const char *name, int namelen, u64 ino, u64 parent_ino,
2729 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2730 struct btrfs_root *root, const char *name, int name_len,
2731 u64 ino, u64 parent_ino, u64 *index);
2734 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2735 struct btrfs_root *root, u64 bytenr, u64 len);
2736 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2737 struct btrfs_root *root,
2738 u64 objectid, u64 pos, u64 offset,
2741 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2742 struct btrfs_root *root, u64 objectid,
2743 u64 offset, const char *buffer, size_t size);
2744 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2745 struct btrfs_root *root, u64 alloc_end,
2746 u64 bytenr, char *data, size_t len);
2747 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2748 struct btrfs_root *root, struct btrfs_path *path,
2752 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2753 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2756 static inline int is_fstree(u64 rootid)
2758 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2759 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2765 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2766 u64 dir, u64 index);
2767 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2769 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2770 struct btrfs_root *root, u64 ino, u64 flags);
2771 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2772 u64 ino, u64 parent_ino, char *name, int namelen,
2773 u8 type, u64 *index, int add_backref, int ignore_existed);
2774 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2775 u64 ino, u64 parent_ino, u64 index, const char *name,
2776 int namelen, int add_orphan);
2777 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2778 struct btrfs_root *root, struct btrfs_path *path,
2780 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2781 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2782 struct btrfs_root *btrfs_mksubvol(struct btrfs_root *root, const char *base,
2783 u64 root_objectid, bool convert);
2786 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2787 struct btrfs_root *root,
2788 struct btrfs_path *path,
2789 u64 ino, u64 offset, u64 len, int ins_len);
2790 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2791 struct btrfs_root *root,
2792 u64 ino, u64 offset, u64 len);
2793 int btrfs_read_file(struct btrfs_root *root, u64 ino, u64 start, int len,