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(r) (__BTRFS_LEAF_DATA_SIZE(r->fs_info->nodesize))
364 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
365 sizeof(struct btrfs_item) - \
366 sizeof(struct btrfs_file_extent_item))
367 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
368 sizeof(struct btrfs_item) -\
369 sizeof(struct btrfs_dir_item))
373 * this is a very generous portion of the super block, giving us
374 * room to translate 14 chunks with 3 stripes each.
376 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
377 #define BTRFS_LABEL_SIZE 256
380 * just in case we somehow lose the roots and are not able to mount,
381 * we store an array of the roots from previous transactions
384 #define BTRFS_NUM_BACKUP_ROOTS 4
385 struct btrfs_root_backup {
387 __le64 tree_root_gen;
390 __le64 chunk_root_gen;
393 __le64 extent_root_gen;
402 __le64 csum_root_gen;
412 u8 extent_root_level;
416 /* future and to align */
418 } __attribute__ ((__packed__));
421 * the super block basically lists the main trees of the FS
422 * it currently lacks any block count etc etc
424 struct btrfs_super_block {
425 u8 csum[BTRFS_CSUM_SIZE];
426 /* the first 3 fields must match struct btrfs_header */
427 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
428 __le64 bytenr; /* this block number */
431 /* allowed to be different from the btrfs_header from here own down */
438 /* this will help find the new super based on the log root */
439 __le64 log_root_transid;
442 __le64 root_dir_objectid;
446 /* Unused and must be equal to nodesize */
447 __le32 __unused_leafsize;
449 __le32 sys_chunk_array_size;
450 __le64 chunk_root_generation;
452 __le64 compat_ro_flags;
453 __le64 incompat_flags;
458 struct btrfs_dev_item dev_item;
460 char label[BTRFS_LABEL_SIZE];
462 __le64 cache_generation;
463 __le64 uuid_tree_generation;
465 /* future expansion */
467 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
468 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
469 } __attribute__ ((__packed__));
472 * Compat flags that we support. If any incompat flags are set other than the
473 * ones specified below then we will fail to mount
475 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
477 * Older kernels on big-endian systems produced broken free space tree bitmaps,
478 * and btrfs-progs also used to corrupt the free space tree. If this bit is
479 * clear, then the free space tree cannot be trusted. btrfs-progs can also
480 * intentionally clear this bit to ask the kernel to rebuild the free space
483 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
485 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
486 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
487 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
488 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
489 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)
492 * older kernels tried to do bigger metadata blocks, but the
493 * code was pretty buggy. Lets not let them try anymore.
495 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
496 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
497 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
498 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
499 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
501 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
504 * The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be
505 * added here until read-write support for the free space tree is implemented in
508 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
510 #define BTRFS_FEATURE_INCOMPAT_SUPP \
511 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
512 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
513 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
514 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
515 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
516 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
517 BTRFS_FEATURE_INCOMPAT_RAID56 | \
518 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
519 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
520 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
523 * A leaf is full of items. offset and size tell us where to find
524 * the item in the leaf (relative to the start of the data area)
527 struct btrfs_disk_key key;
530 } __attribute__ ((__packed__));
533 * leaves have an item area and a data area:
534 * [item0, item1....itemN] [free space] [dataN...data1, data0]
536 * The data is separate from the items to get the keys closer together
540 struct btrfs_header header;
541 struct btrfs_item items[];
542 } __attribute__ ((__packed__));
545 * all non-leaf blocks are nodes, they hold only keys and pointers to
548 struct btrfs_key_ptr {
549 struct btrfs_disk_key key;
552 } __attribute__ ((__packed__));
555 struct btrfs_header header;
556 struct btrfs_key_ptr ptrs[];
557 } __attribute__ ((__packed__));
560 * btrfs_paths remember the path taken from the root down to the leaf.
561 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
562 * to any other levels that are present.
564 * The slots array records the index of the item or block pointer
565 * used while walking the tree.
569 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
570 int slots[BTRFS_MAX_LEVEL];
572 /* The kernel locking sheme is not done in userspace. */
573 int locks[BTRFS_MAX_LEVEL];
576 /* keep some upper locks as we walk down */
580 * set by btrfs_split_item, tells search_slot to keep all locks
581 * and to force calls to keep space in the nodes
588 * items in the extent btree are used to record the objectid of the
589 * owner of the block and the number of references
592 struct btrfs_extent_item {
596 } __attribute__ ((__packed__));
598 struct btrfs_extent_item_v0 {
600 } __attribute__ ((__packed__));
602 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
603 sizeof(struct btrfs_item))
604 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
606 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
607 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
609 /* following flags only apply to tree blocks */
611 /* use full backrefs for extent pointers in the block*/
612 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
614 struct btrfs_tree_block_info {
615 struct btrfs_disk_key key;
617 } __attribute__ ((__packed__));
619 struct btrfs_extent_data_ref {
624 } __attribute__ ((__packed__));
626 struct btrfs_shared_data_ref {
628 } __attribute__ ((__packed__));
630 struct btrfs_extent_inline_ref {
633 } __attribute__ ((__packed__));
635 struct btrfs_extent_ref_v0 {
640 } __attribute__ ((__packed__));
642 /* dev extents record free space on individual devices. The owner
643 * field points back to the chunk allocation mapping tree that allocated
644 * the extent. The chunk tree uuid field is a way to double check the owner
646 struct btrfs_dev_extent {
648 __le64 chunk_objectid;
651 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
652 } __attribute__ ((__packed__));
654 struct btrfs_inode_ref {
658 } __attribute__ ((__packed__));
660 struct btrfs_inode_extref {
661 __le64 parent_objectid;
664 __u8 name[0]; /* name goes here */
665 } __attribute__ ((__packed__));
667 struct btrfs_timespec {
670 } __attribute__ ((__packed__));
673 BTRFS_COMPRESS_NONE = 0,
674 BTRFS_COMPRESS_ZLIB = 1,
675 BTRFS_COMPRESS_LZO = 2,
676 BTRFS_COMPRESS_ZSTD = 3,
677 BTRFS_COMPRESS_TYPES = 3,
678 BTRFS_COMPRESS_LAST = 4,
679 } btrfs_compression_type;
681 /* we don't understand any encryption methods right now */
683 BTRFS_ENCRYPTION_NONE = 0,
684 BTRFS_ENCRYPTION_LAST = 1,
685 } btrfs_encryption_type;
687 enum btrfs_tree_block_status {
688 BTRFS_TREE_BLOCK_CLEAN,
689 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
690 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
691 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
692 BTRFS_TREE_BLOCK_INVALID_LEVEL,
693 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
694 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
697 struct btrfs_inode_item {
698 /* nfs style generation number */
700 /* transid that last touched this inode */
712 /* modification sequence number for NFS */
716 * a little future expansion, for more than this we can
717 * just grow the inode item and version it
720 struct btrfs_timespec atime;
721 struct btrfs_timespec ctime;
722 struct btrfs_timespec mtime;
723 struct btrfs_timespec otime;
724 } __attribute__ ((__packed__));
726 struct btrfs_dir_log_item {
728 } __attribute__ ((__packed__));
730 struct btrfs_dir_item {
731 struct btrfs_disk_key location;
736 } __attribute__ ((__packed__));
738 struct btrfs_root_item_v0 {
739 struct btrfs_inode_item inode;
745 __le64 last_snapshot;
748 struct btrfs_disk_key drop_progress;
751 } __attribute__ ((__packed__));
753 struct btrfs_root_item {
754 struct btrfs_inode_item inode;
760 __le64 last_snapshot;
763 struct btrfs_disk_key drop_progress;
768 * The following fields appear after subvol_uuids+subvol_times
773 * This generation number is used to test if the new fields are valid
774 * and up to date while reading the root item. Every time the root item
775 * is written out, the "generation" field is copied into this field. If
776 * anyone ever mounted the fs with an older kernel, we will have
777 * mismatching generation values here and thus must invalidate the
778 * new fields. See btrfs_update_root and btrfs_find_last_root for
780 * the offset of generation_v2 is also used as the start for the memset
781 * when invalidating the fields.
783 __le64 generation_v2;
784 u8 uuid[BTRFS_UUID_SIZE];
785 u8 parent_uuid[BTRFS_UUID_SIZE];
786 u8 received_uuid[BTRFS_UUID_SIZE];
787 __le64 ctransid; /* updated when an inode changes */
788 __le64 otransid; /* trans when created */
789 __le64 stransid; /* trans when sent. non-zero for received subvol */
790 __le64 rtransid; /* trans when received. non-zero for received subvol */
791 struct btrfs_timespec ctime;
792 struct btrfs_timespec otime;
793 struct btrfs_timespec stime;
794 struct btrfs_timespec rtime;
795 __le64 reserved[8]; /* for future */
796 } __attribute__ ((__packed__));
799 * this is used for both forward and backward root refs
801 struct btrfs_root_ref {
805 } __attribute__ ((__packed__));
807 struct btrfs_disk_balance_args {
809 * profiles to operate on, single is denoted by
810 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
816 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
817 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
830 /* devid subset filter [pstart..pend) */
834 /* btrfs virtual address space subset filter [vstart..vend) */
839 * profile to convert to, single is denoted by
840 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
844 /* BTRFS_BALANCE_ARGS_* */
848 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
849 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
861 * Process chunks that cross stripes_min..stripes_max devices,
862 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
868 } __attribute__ ((__packed__));
871 * store balance parameters to disk so that balance can be properly
872 * resumed after crash or unmount
874 struct btrfs_balance_item {
875 /* BTRFS_BALANCE_* */
878 struct btrfs_disk_balance_args data;
879 struct btrfs_disk_balance_args meta;
880 struct btrfs_disk_balance_args sys;
883 } __attribute__ ((__packed__));
885 #define BTRFS_FILE_EXTENT_INLINE 0
886 #define BTRFS_FILE_EXTENT_REG 1
887 #define BTRFS_FILE_EXTENT_PREALLOC 2
889 struct btrfs_file_extent_item {
891 * transaction id that created this extent
895 * max number of bytes to hold this extent in ram
896 * when we split a compressed extent we can't know how big
897 * each of the resulting pieces will be. So, this is
898 * an upper limit on the size of the extent in ram instead of
904 * 32 bits for the various ways we might encode the data,
905 * including compression and encryption. If any of these
906 * are set to something a given disk format doesn't understand
907 * it is treated like an incompat flag for reading and writing,
912 __le16 other_encoding; /* spare for later use */
914 /* are we inline data or a real extent? */
918 * disk space consumed by the extent, checksum blocks are included
922 __le64 disk_num_bytes;
924 * the logical offset in file blocks (no csums)
925 * this extent record is for. This allows a file extent to point
926 * into the middle of an existing extent on disk, sharing it
927 * between two snapshots (useful if some bytes in the middle of the
928 * extent have changed
932 * the logical number of file blocks (no csums included)
936 } __attribute__ ((__packed__));
938 struct btrfs_dev_stats_item {
940 * grow this item struct at the end for future enhancements and keep
941 * the existing values unchanged
943 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
944 } __attribute__ ((__packed__));
946 struct btrfs_csum_item {
948 } __attribute__ ((__packed__));
951 * We don't want to overwrite 1M at the beginning of device, even though
952 * there is our 1st superblock at 64k. Some possible reasons:
953 * - the first 64k blank is useful for some boot loader/manager
954 * - the first 1M could be scratched by buggy partitioner or somesuch
956 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)SZ_1M)
958 /* tag for the radix tree of block groups in ram */
959 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
960 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
961 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
962 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
963 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
964 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
965 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
966 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
967 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
968 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
969 #define BTRFS_NR_RAID_TYPES 7
971 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
972 BTRFS_BLOCK_GROUP_SYSTEM | \
973 BTRFS_BLOCK_GROUP_METADATA)
975 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
976 BTRFS_BLOCK_GROUP_RAID1 | \
977 BTRFS_BLOCK_GROUP_RAID5 | \
978 BTRFS_BLOCK_GROUP_RAID6 | \
979 BTRFS_BLOCK_GROUP_DUP | \
980 BTRFS_BLOCK_GROUP_RAID10)
982 /* used in struct btrfs_balance_args fields */
983 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
986 * GLOBAL_RSV does not exist as a on-disk block group type and is used
987 * internally for exporting info about global block reserve from space infos
989 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
991 #define BTRFS_QGROUP_LEVEL_SHIFT 48
993 static inline u64 btrfs_qgroup_level(u64 qgroupid)
995 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
998 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
1000 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
1003 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1004 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1005 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1007 struct btrfs_qgroup_status_item {
1011 __le64 rescan; /* progress during scanning */
1012 } __attribute__ ((__packed__));
1014 struct btrfs_block_group_item {
1016 __le64 chunk_objectid;
1018 } __attribute__ ((__packed__));
1020 struct btrfs_free_space_info {
1021 __le32 extent_count;
1023 } __attribute__ ((__packed__));
1025 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1027 struct btrfs_qgroup_info_item {
1030 __le64 referenced_compressed;
1032 __le64 exclusive_compressed;
1033 } __attribute__ ((__packed__));
1035 /* flags definition for qgroup limits */
1036 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1037 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1038 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1039 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1040 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1041 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1043 struct btrfs_qgroup_limit_item {
1045 __le64 max_referenced;
1046 __le64 max_exclusive;
1047 __le64 rsv_referenced;
1048 __le64 rsv_exclusive;
1049 } __attribute__ ((__packed__));
1051 struct btrfs_space_info {
1057 struct list_head list;
1060 struct btrfs_block_group_cache {
1061 struct cache_extent cache;
1062 struct btrfs_key key;
1063 struct btrfs_block_group_item item;
1064 struct btrfs_space_info *space_info;
1065 struct btrfs_free_space_ctl *free_space_ctl;
1073 struct btrfs_device;
1074 struct btrfs_fs_devices;
1075 struct btrfs_fs_info {
1076 u8 fsid[BTRFS_FSID_SIZE];
1078 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1079 u8 *new_chunk_tree_uuid;
1080 struct btrfs_root *fs_root;
1081 struct btrfs_root *extent_root;
1082 struct btrfs_root *tree_root;
1083 struct btrfs_root *chunk_root;
1084 struct btrfs_root *dev_root;
1085 struct btrfs_root *csum_root;
1086 struct btrfs_root *quota_root;
1087 struct btrfs_root *free_space_root;
1089 struct rb_root fs_root_tree;
1091 /* the log root tree is a directory of all the other log roots */
1092 struct btrfs_root *log_root_tree;
1094 struct extent_io_tree extent_cache;
1095 struct extent_io_tree free_space_cache;
1096 struct extent_io_tree block_group_cache;
1097 struct extent_io_tree pinned_extents;
1098 struct extent_io_tree pending_del;
1099 struct extent_io_tree extent_ins;
1100 struct extent_io_tree *excluded_extents;
1102 /* logical->physical extent mapping */
1103 struct btrfs_mapping_tree mapping_tree;
1106 u64 last_trans_committed;
1108 u64 avail_data_alloc_bits;
1109 u64 avail_metadata_alloc_bits;
1110 u64 avail_system_alloc_bits;
1111 u64 data_alloc_profile;
1112 u64 metadata_alloc_profile;
1113 u64 system_alloc_profile;
1116 struct btrfs_trans_handle *running_transaction;
1117 struct btrfs_super_block *super_copy;
1118 struct mutex fs_mutex;
1123 struct list_head dirty_cowonly_roots;
1124 struct list_head recow_ebs;
1126 struct btrfs_fs_devices *fs_devices;
1127 struct list_head space_info;
1129 unsigned int system_allocs:1;
1130 unsigned int readonly:1;
1131 unsigned int on_restoring:1;
1132 unsigned int is_chunk_recover:1;
1133 unsigned int quota_enabled:1;
1134 unsigned int suppress_check_block_errors:1;
1135 unsigned int ignore_fsid_mismatch:1;
1136 unsigned int ignore_chunk_tree_error:1;
1137 unsigned int avoid_meta_chunk_alloc:1;
1138 unsigned int avoid_sys_chunk_alloc:1;
1139 unsigned int finalize_on_close:1;
1141 int transaction_aborted;
1143 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1144 struct btrfs_root *root,
1145 u64 bytenr, u64 num_bytes, u64 parent,
1146 u64 root_objectid, u64 owner, u64 offset,
1148 struct cache_tree *fsck_extent_cache;
1149 struct cache_tree *corrupt_blocks;
1151 /* Cached block sizes */
1158 * in ram representation of the tree. extent_root is used for all allocations
1159 * and for the extent tree extent_root root.
1162 struct extent_buffer *node;
1163 struct extent_buffer *commit_root;
1164 struct btrfs_root_item root_item;
1165 struct btrfs_key root_key;
1166 struct btrfs_fs_info *fs_info;
1175 u64 last_inode_alloc;
1178 * Record orphan data extent ref
1180 * TODO: Don't restore things in btrfs_root.
1181 * Directly record it into inode_record, which needs a lot of
1182 * infrastructure change to allow cooperation between extent
1185 struct list_head orphan_data_extents;
1187 /* the dirty list is only used by non-reference counted roots */
1188 struct list_head dirty_list;
1189 struct rb_node rb_node;
1193 * inode items have the data typically returned from stat and store other
1194 * info about object characteristics. There is one for every file and dir in
1197 #define BTRFS_INODE_ITEM_KEY 1
1198 #define BTRFS_INODE_REF_KEY 12
1199 #define BTRFS_INODE_EXTREF_KEY 13
1200 #define BTRFS_XATTR_ITEM_KEY 24
1201 #define BTRFS_ORPHAN_ITEM_KEY 48
1203 #define BTRFS_DIR_LOG_ITEM_KEY 60
1204 #define BTRFS_DIR_LOG_INDEX_KEY 72
1206 * dir items are the name -> inode pointers in a directory. There is one
1207 * for every name in a directory.
1209 #define BTRFS_DIR_ITEM_KEY 84
1210 #define BTRFS_DIR_INDEX_KEY 96
1213 * extent data is for file data
1215 #define BTRFS_EXTENT_DATA_KEY 108
1218 * csum items have the checksums for data in the extents
1220 #define BTRFS_CSUM_ITEM_KEY 120
1222 * extent csums are stored in a separate tree and hold csums for
1223 * an entire extent on disk.
1225 #define BTRFS_EXTENT_CSUM_KEY 128
1228 * root items point to tree roots. There are typically in the root
1229 * tree used by the super block to find all the other trees
1231 #define BTRFS_ROOT_ITEM_KEY 132
1234 * root backrefs tie subvols and snapshots to the directory entries that
1237 #define BTRFS_ROOT_BACKREF_KEY 144
1240 * root refs make a fast index for listing all of the snapshots and
1241 * subvolumes referenced by a given root. They point directly to the
1242 * directory item in the root that references the subvol
1244 #define BTRFS_ROOT_REF_KEY 156
1247 * extent items are in the extent map tree. These record which blocks
1248 * are used, and how many references there are to each block
1250 #define BTRFS_EXTENT_ITEM_KEY 168
1253 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1254 * the length, so we save the level in key->offset instead of the length.
1256 #define BTRFS_METADATA_ITEM_KEY 169
1258 #define BTRFS_TREE_BLOCK_REF_KEY 176
1260 #define BTRFS_EXTENT_DATA_REF_KEY 178
1262 /* old style extent backrefs */
1263 #define BTRFS_EXTENT_REF_V0_KEY 180
1265 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1267 #define BTRFS_SHARED_DATA_REF_KEY 184
1271 * block groups give us hints into the extent allocation trees. Which
1272 * blocks are free etc etc
1274 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1277 * Every block group is represented in the free space tree by a free space info
1278 * item, which stores some accounting information. It is keyed on
1279 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1281 #define BTRFS_FREE_SPACE_INFO_KEY 198
1284 * A free space extent tracks an extent of space that is free in a block group.
1285 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1287 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1290 * When a block group becomes very fragmented, we convert it to use bitmaps
1291 * instead of extents. A free space bitmap is keyed on
1292 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1293 * (length / sectorsize) bits.
1295 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1297 #define BTRFS_DEV_EXTENT_KEY 204
1298 #define BTRFS_DEV_ITEM_KEY 216
1299 #define BTRFS_CHUNK_ITEM_KEY 228
1301 #define BTRFS_BALANCE_ITEM_KEY 248
1306 #define BTRFS_QGROUP_STATUS_KEY 240
1307 #define BTRFS_QGROUP_INFO_KEY 242
1308 #define BTRFS_QGROUP_LIMIT_KEY 244
1309 #define BTRFS_QGROUP_RELATION_KEY 246
1312 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1314 #define BTRFS_BALANCE_ITEM_KEY 248
1317 * The key type for tree items that are stored persistently, but do not need to
1318 * exist for extended period of time. The items can exist in any tree.
1320 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1324 * - balance status item
1325 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1327 #define BTRFS_TEMPORARY_ITEM_KEY 248
1330 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1332 #define BTRFS_DEV_STATS_KEY 249
1335 * The key type for tree items that are stored persistently and usually exist
1336 * for a long period, eg. filesystem lifetime. The item kinds can be status
1337 * information, stats or preference values. The item can exist in any tree.
1339 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1343 * - device statistics, store IO stats in the device tree, one key for all
1345 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1347 #define BTRFS_PERSISTENT_ITEM_KEY 249
1350 * Persistently stores the device replace state in the device tree.
1351 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1353 #define BTRFS_DEV_REPLACE_KEY 250
1356 * Stores items that allow to quickly map UUIDs to something else.
1357 * These items are part of the filesystem UUID tree.
1358 * The key is built like this:
1359 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1361 #if BTRFS_UUID_SIZE != 16
1362 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1364 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1365 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1366 * received subvols */
1369 * string items are for debugging. They just store a short string of
1372 #define BTRFS_STRING_ITEM_KEY 253
1376 #define BTRFS_INODE_NODATASUM (1 << 0)
1377 #define BTRFS_INODE_NODATACOW (1 << 1)
1378 #define BTRFS_INODE_READONLY (1 << 2)
1379 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1380 #define BTRFS_INODE_PREALLOC (1 << 4)
1381 #define BTRFS_INODE_SYNC (1 << 5)
1382 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1383 #define BTRFS_INODE_APPEND (1 << 7)
1384 #define BTRFS_INODE_NODUMP (1 << 8)
1385 #define BTRFS_INODE_NOATIME (1 << 9)
1386 #define BTRFS_INODE_DIRSYNC (1 << 10)
1387 #define BTRFS_INODE_COMPRESS (1 << 11)
1389 #define read_eb_member(eb, ptr, type, member, result) ( \
1390 read_extent_buffer(eb, (char *)(result), \
1391 ((unsigned long)(ptr)) + \
1392 offsetof(type, member), \
1393 sizeof(((type *)0)->member)))
1395 #define write_eb_member(eb, ptr, type, member, result) ( \
1396 write_extent_buffer(eb, (char *)(result), \
1397 ((unsigned long)(ptr)) + \
1398 offsetof(type, member), \
1399 sizeof(((type *)0)->member)))
1401 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1402 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1404 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1405 return le##bits##_to_cpu(h->member); \
1407 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1410 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1411 h->member = cpu_to_le##bits(val); \
1414 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1415 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1418 unsigned long offset = (unsigned long)s; \
1419 const type *p = (type *) (eb->data + offset); \
1420 return get_unaligned_le##bits(&p->member); \
1422 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1423 type *s, u##bits val) \
1425 unsigned long offset = (unsigned long)s; \
1426 type *p = (type *) (eb->data + offset); \
1427 put_unaligned_le##bits(val, &p->member); \
1430 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1431 static inline u##bits btrfs_##name(const type *s) \
1433 return le##bits##_to_cpu(s->member); \
1435 static inline void btrfs_set_##name(type *s, u##bits val) \
1437 s->member = cpu_to_le##bits(val); \
1440 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1441 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1442 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1443 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1444 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1445 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1447 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1448 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1449 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1450 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1451 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1452 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1454 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1455 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1457 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1459 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1461 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1463 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1465 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1466 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1468 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1470 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1472 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1475 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1477 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1480 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1482 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1485 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1486 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1487 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1488 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1489 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1490 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1491 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1492 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1493 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1494 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1495 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1497 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1499 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1502 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1503 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1504 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1506 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1508 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1510 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1512 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1513 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1515 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1517 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1518 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1520 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1523 unsigned long offset = (unsigned long)c;
1524 offset += offsetof(struct btrfs_chunk, stripe);
1525 offset += nr * sizeof(struct btrfs_stripe);
1526 return (struct btrfs_stripe *)offset;
1529 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1531 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1534 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1535 struct btrfs_chunk *c, int nr)
1537 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1540 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1541 struct btrfs_chunk *c, int nr,
1544 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1547 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1548 struct btrfs_chunk *c, int nr)
1550 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1553 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1554 struct btrfs_chunk *c, int nr,
1557 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1560 /* struct btrfs_block_group_item */
1561 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1563 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1565 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1566 struct btrfs_block_group_item, chunk_objectid, 64);
1568 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1569 struct btrfs_block_group_item, chunk_objectid, 64);
1570 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1571 struct btrfs_block_group_item, flags, 64);
1572 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1573 struct btrfs_block_group_item, flags, 64);
1575 /* struct btrfs_free_space_info */
1576 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1578 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1580 /* struct btrfs_inode_ref */
1581 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1582 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1583 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1585 /* struct btrfs_inode_extref */
1586 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1587 parent_objectid, 64);
1588 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1590 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1592 /* struct btrfs_inode_item */
1593 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1594 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1595 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1596 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1597 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1598 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1599 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1600 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1601 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1602 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1603 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1604 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1606 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1607 struct btrfs_inode_item, generation, 64);
1608 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1609 struct btrfs_inode_item, sequence, 64);
1610 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1611 struct btrfs_inode_item, transid, 64);
1612 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1613 struct btrfs_inode_item, size, 64);
1614 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1615 struct btrfs_inode_item, nbytes, 64);
1616 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1617 struct btrfs_inode_item, block_group, 64);
1618 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1619 struct btrfs_inode_item, nlink, 32);
1620 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1621 struct btrfs_inode_item, uid, 32);
1622 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1623 struct btrfs_inode_item, gid, 32);
1624 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1625 struct btrfs_inode_item, mode, 32);
1626 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1627 struct btrfs_inode_item, rdev, 64);
1628 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1629 struct btrfs_inode_item, flags, 64);
1631 static inline struct btrfs_timespec *
1632 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1634 unsigned long ptr = (unsigned long)inode_item;
1635 ptr += offsetof(struct btrfs_inode_item, atime);
1636 return (struct btrfs_timespec *)ptr;
1639 static inline struct btrfs_timespec *
1640 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1642 unsigned long ptr = (unsigned long)inode_item;
1643 ptr += offsetof(struct btrfs_inode_item, mtime);
1644 return (struct btrfs_timespec *)ptr;
1647 static inline struct btrfs_timespec *
1648 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1650 unsigned long ptr = (unsigned long)inode_item;
1651 ptr += offsetof(struct btrfs_inode_item, ctime);
1652 return (struct btrfs_timespec *)ptr;
1655 static inline struct btrfs_timespec *
1656 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1658 unsigned long ptr = (unsigned long)inode_item;
1659 ptr += offsetof(struct btrfs_inode_item, otime);
1660 return (struct btrfs_timespec *)ptr;
1663 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1664 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1665 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1667 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1670 /* struct btrfs_dev_extent */
1671 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1673 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1674 chunk_objectid, 64);
1675 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1677 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1679 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1682 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1684 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1685 return (u8 *)((unsigned long)dev + ptr);
1689 /* struct btrfs_extent_item */
1690 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1691 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1692 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1694 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1695 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1697 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1699 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1701 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1702 struct btrfs_tree_block_info *item,
1703 struct btrfs_disk_key *key)
1705 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1708 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1709 struct btrfs_tree_block_info *item,
1710 struct btrfs_disk_key *key)
1712 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1715 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1717 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1719 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1721 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1724 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1727 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1729 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1731 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1732 struct btrfs_extent_inline_ref, type, 8);
1733 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1734 struct btrfs_extent_inline_ref, offset, 64);
1736 static inline u32 btrfs_extent_inline_ref_size(int type)
1738 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1739 type == BTRFS_SHARED_BLOCK_REF_KEY)
1740 return sizeof(struct btrfs_extent_inline_ref);
1741 if (type == BTRFS_SHARED_DATA_REF_KEY)
1742 return sizeof(struct btrfs_shared_data_ref) +
1743 sizeof(struct btrfs_extent_inline_ref);
1744 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1745 return sizeof(struct btrfs_extent_data_ref) +
1746 offsetof(struct btrfs_extent_inline_ref, offset);
1751 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1752 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1754 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1755 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1757 /* struct btrfs_node */
1758 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1759 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1761 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1764 ptr = offsetof(struct btrfs_node, ptrs) +
1765 sizeof(struct btrfs_key_ptr) * nr;
1766 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1769 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1773 ptr = offsetof(struct btrfs_node, ptrs) +
1774 sizeof(struct btrfs_key_ptr) * nr;
1775 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1778 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1781 ptr = offsetof(struct btrfs_node, ptrs) +
1782 sizeof(struct btrfs_key_ptr) * nr;
1783 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1786 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1790 ptr = offsetof(struct btrfs_node, ptrs) +
1791 sizeof(struct btrfs_key_ptr) * nr;
1792 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1795 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1797 return offsetof(struct btrfs_node, ptrs) +
1798 sizeof(struct btrfs_key_ptr) * nr;
1801 static inline void btrfs_node_key(struct extent_buffer *eb,
1802 struct btrfs_disk_key *disk_key, int nr)
1805 ptr = btrfs_node_key_ptr_offset(nr);
1806 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1807 struct btrfs_key_ptr, key, disk_key);
1810 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1811 struct btrfs_disk_key *disk_key, int nr)
1814 ptr = btrfs_node_key_ptr_offset(nr);
1815 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1816 struct btrfs_key_ptr, key, disk_key);
1819 /* struct btrfs_item */
1820 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1821 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1823 static inline unsigned long btrfs_item_nr_offset(int nr)
1825 return offsetof(struct btrfs_leaf, items) +
1826 sizeof(struct btrfs_item) * nr;
1829 static inline struct btrfs_item *btrfs_item_nr(int nr)
1831 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1834 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1835 struct btrfs_item *item)
1837 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1840 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1842 return btrfs_item_end(eb, btrfs_item_nr(nr));
1845 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1847 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1850 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1852 return btrfs_item_size(eb, btrfs_item_nr(nr));
1855 static inline void btrfs_item_key(struct extent_buffer *eb,
1856 struct btrfs_disk_key *disk_key, int nr)
1858 struct btrfs_item *item = btrfs_item_nr(nr);
1859 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1862 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1863 struct btrfs_disk_key *disk_key, int nr)
1865 struct btrfs_item *item = btrfs_item_nr(nr);
1866 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1869 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1872 * struct btrfs_root_ref
1874 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1875 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1876 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1878 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1879 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1880 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1882 /* struct btrfs_dir_item */
1883 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1884 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1885 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1886 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1888 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1889 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1890 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1891 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1893 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1894 struct btrfs_dir_item *item,
1895 struct btrfs_disk_key *key)
1897 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1900 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1901 struct btrfs_dir_item *item,
1902 struct btrfs_disk_key *key)
1904 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1907 /* struct btrfs_free_space_header */
1908 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1910 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1912 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1915 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1916 struct btrfs_free_space_header *h,
1917 struct btrfs_disk_key *key)
1919 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1922 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1923 struct btrfs_free_space_header *h,
1924 struct btrfs_disk_key *key)
1926 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1929 /* struct btrfs_disk_key */
1930 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1932 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1933 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1935 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1936 struct btrfs_disk_key *disk)
1938 cpu->offset = le64_to_cpu(disk->offset);
1939 cpu->type = disk->type;
1940 cpu->objectid = le64_to_cpu(disk->objectid);
1943 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1944 struct btrfs_key *cpu)
1946 disk->offset = cpu_to_le64(cpu->offset);
1947 disk->type = cpu->type;
1948 disk->objectid = cpu_to_le64(cpu->objectid);
1951 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1952 struct btrfs_key *key, int nr)
1954 struct btrfs_disk_key disk_key;
1955 btrfs_node_key(eb, &disk_key, nr);
1956 btrfs_disk_key_to_cpu(key, &disk_key);
1959 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1960 struct btrfs_key *key, int nr)
1962 struct btrfs_disk_key disk_key;
1963 btrfs_item_key(eb, &disk_key, nr);
1964 btrfs_disk_key_to_cpu(key, &disk_key);
1967 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1968 struct btrfs_dir_item *item,
1969 struct btrfs_key *key)
1971 struct btrfs_disk_key disk_key;
1972 btrfs_dir_item_key(eb, item, &disk_key);
1973 btrfs_disk_key_to_cpu(key, &disk_key);
1976 /* struct btrfs_header */
1977 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1978 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1980 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1981 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1982 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1983 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1984 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1985 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1987 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1988 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1991 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1993 return (btrfs_header_flags(eb) & flag) == flag;
1996 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1998 u64 flags = btrfs_header_flags(eb);
1999 btrfs_set_header_flags(eb, flags | flag);
2000 return (flags & flag) == flag;
2003 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2005 u64 flags = btrfs_header_flags(eb);
2006 btrfs_set_header_flags(eb, flags & ~flag);
2007 return (flags & flag) == flag;
2010 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2012 u64 flags = btrfs_header_flags(eb);
2013 return flags >> BTRFS_BACKREF_REV_SHIFT;
2016 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2019 u64 flags = btrfs_header_flags(eb);
2020 flags &= ~BTRFS_BACKREF_REV_MASK;
2021 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2022 btrfs_set_header_flags(eb, flags);
2025 static inline unsigned long btrfs_header_fsid(void)
2027 return offsetof(struct btrfs_header, fsid);
2030 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2032 return offsetof(struct btrfs_header, chunk_tree_uuid);
2035 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
2037 unsigned long ptr = offsetof(struct btrfs_header, csum);
2041 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2043 return (btrfs_header_level(eb) == 0);
2046 /* struct btrfs_root_item */
2047 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2049 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2050 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2051 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2053 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2055 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2056 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2057 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2058 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2059 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2060 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2061 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2062 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2064 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2066 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2068 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2070 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2072 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2075 /* struct btrfs_root_backup */
2076 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2078 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2080 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2081 tree_root_level, 8);
2083 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2085 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2086 chunk_root_gen, 64);
2087 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2088 chunk_root_level, 8);
2090 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2092 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2093 extent_root_gen, 64);
2094 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2095 extent_root_level, 8);
2097 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2099 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2101 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2104 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2106 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2108 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2111 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2113 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2115 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2116 csum_root_level, 8);
2117 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2119 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2121 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2124 /* struct btrfs_super_block */
2126 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2127 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2128 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2130 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2131 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2132 struct btrfs_super_block, sys_chunk_array_size, 32);
2133 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2134 struct btrfs_super_block, chunk_root_generation, 64);
2135 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2137 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2139 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2140 chunk_root_level, 8);
2141 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2143 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2144 log_root_transid, 64);
2145 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2147 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2149 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2151 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2153 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2155 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2157 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2158 root_dir_objectid, 64);
2159 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2161 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2163 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2164 compat_ro_flags, 64);
2165 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2166 incompat_flags, 64);
2167 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2169 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2170 cache_generation, 64);
2171 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2172 uuid_tree_generation, 64);
2173 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2175 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2177 int t = btrfs_super_csum_type(s);
2178 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2179 return btrfs_csum_sizes[t];
2182 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2184 return offsetof(struct btrfs_leaf, items);
2187 /* struct btrfs_file_extent_item */
2188 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2189 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2191 static inline unsigned long btrfs_file_extent_inline_start(struct
2192 btrfs_file_extent_item *e)
2194 unsigned long offset = (unsigned long)e;
2195 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2199 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2201 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2204 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2206 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2208 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2210 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2212 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2213 disk_num_bytes, 64);
2214 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2216 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2218 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2220 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2222 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2224 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2226 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2228 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2230 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2232 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2233 other_encoding, 16);
2235 /* btrfs_qgroup_status_item */
2236 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2238 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2240 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2242 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2245 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2246 struct btrfs_qgroup_status_item, version, 64);
2247 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2248 struct btrfs_qgroup_status_item, generation, 64);
2249 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2250 struct btrfs_qgroup_status_item, flags, 64);
2251 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2252 struct btrfs_qgroup_status_item, rescan, 64);
2254 /* btrfs_qgroup_info_item */
2255 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2257 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2259 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2260 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2261 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2263 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2264 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2266 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2267 struct btrfs_qgroup_info_item, generation, 64);
2268 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2269 struct btrfs_qgroup_info_item, referenced, 64);
2270 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2271 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2272 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2273 struct btrfs_qgroup_info_item, exclusive, 64);
2274 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2275 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2277 /* btrfs_qgroup_limit_item */
2278 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2280 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2281 max_referenced, 64);
2282 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2284 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2285 rsv_referenced, 64);
2286 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2289 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2290 struct btrfs_qgroup_limit_item, flags, 64);
2291 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2292 struct btrfs_qgroup_limit_item, max_referenced, 64);
2293 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2294 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2295 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2296 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2297 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2298 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2300 /* btrfs_balance_item */
2301 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
2303 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
2304 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2306 unsigned long offset = (unsigned long)bi;
2307 struct btrfs_balance_item *p;
2308 p = (struct btrfs_balance_item *)(eb->data + offset);
2312 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
2313 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2315 unsigned long offset = (unsigned long)bi;
2316 struct btrfs_balance_item *p;
2317 p = (struct btrfs_balance_item *)(eb->data + offset);
2321 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
2322 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2324 unsigned long offset = (unsigned long)bi;
2325 struct btrfs_balance_item *p;
2326 p = (struct btrfs_balance_item *)(eb->data + offset);
2331 * btrfs_dev_stats_item helper, returns pointer to the raw array, do the
2332 * endiannes conversion, @dsi is offset to eb data
2334 static inline __le64* btrfs_dev_stats_values(struct extent_buffer *eb,
2335 struct btrfs_dev_stats_item *dsi)
2337 unsigned long offset = (unsigned long)dsi;
2338 struct btrfs_dev_stats_item *p;
2339 p = (struct btrfs_dev_stats_item *)(eb->data + offset);
2344 * this returns the number of bytes used by the item on disk, minus the
2345 * size of any extent headers. If a file is compressed on disk, this is
2346 * the compressed size
2348 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2349 struct btrfs_item *e)
2351 unsigned long offset;
2352 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2353 return btrfs_item_size(eb, e) - offset;
2356 /* struct btrfs_ioctl_search_header */
2357 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2359 return get_unaligned_64(&sh->transid);
2362 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2364 return get_unaligned_64(&sh->objectid);
2367 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2369 return get_unaligned_64(&sh->offset);
2372 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2374 return get_unaligned_32(&sh->type);
2377 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2379 return get_unaligned_32(&sh->len);
2382 /* this returns the number of file bytes represented by the inline item.
2383 * If an item is compressed, this is the uncompressed size
2385 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2387 struct btrfs_file_extent_item *fi)
2390 * return the space used on disk if this item isn't
2391 * compressed or encoded
2393 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2394 btrfs_file_extent_encryption(eb, fi) == 0 &&
2395 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2396 return btrfs_file_extent_inline_item_len(eb,
2397 btrfs_item_nr(slot));
2400 /* otherwise use the ram bytes field */
2401 return btrfs_file_extent_ram_bytes(eb, fi);
2404 #define btrfs_fs_incompat(fs_info, opt) \
2405 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
2407 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2409 struct btrfs_super_block *disk_super;
2410 disk_super = fs_info->super_copy;
2411 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2414 #define btrfs_fs_compat_ro(fs_info, opt) \
2415 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
2417 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2419 struct btrfs_super_block *disk_super;
2420 disk_super = fs_info->super_copy;
2421 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2424 /* helper function to cast into the data area of the leaf. */
2425 #define btrfs_item_ptr(leaf, slot, type) \
2426 ((type *)(btrfs_leaf_data(leaf) + \
2427 btrfs_item_offset_nr(leaf, slot)))
2429 #define btrfs_item_ptr_offset(leaf, slot) \
2430 ((unsigned long)(btrfs_leaf_data(leaf) + \
2431 btrfs_item_offset_nr(leaf, slot)))
2434 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2435 struct btrfs_root *root,
2436 u64 num_bytes, u64 empty_size,
2437 u64 hint_byte, u64 search_end,
2438 struct btrfs_key *ins, int data);
2439 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2440 struct btrfs_root *root);
2441 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2442 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2443 u64 bytenr, u64 num_bytes);
2444 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2445 struct btrfs_root *root);
2446 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2447 btrfs_fs_info *info,
2449 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2450 btrfs_fs_info *info,
2452 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2453 struct btrfs_root *root,
2454 u32 blocksize, u64 root_objectid,
2455 struct btrfs_disk_key *key, int level,
2456 u64 hint, u64 empty_size);
2457 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2458 struct btrfs_root *root,
2459 u64 num_bytes, u64 parent,
2460 u64 root_objectid, u64 ref_generation,
2461 u64 owner, u64 empty_size, u64 hint_byte,
2462 u64 search_end, struct btrfs_key *ins, int data);
2463 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2464 struct btrfs_root *root, u64 bytenr,
2465 u64 offset, int metadata, u64 *refs, u64 *flags);
2466 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2467 struct btrfs_root *root,
2468 u64 bytenr, int level, u64 flags);
2469 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2470 struct extent_buffer *buf, int record_parent);
2471 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2472 struct extent_buffer *buf, int record_parent);
2473 int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2474 struct btrfs_root *root,
2475 struct extent_buffer *buf,
2476 u64 parent, int last_ref);
2477 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2478 struct btrfs_root *root,
2479 u64 bytenr, u64 num_bytes, u64 parent,
2480 u64 root_objectid, u64 owner, u64 offset);
2481 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2482 struct btrfs_root *root,
2483 struct extent_io_tree *unpin);
2484 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2485 struct btrfs_root *root,
2486 u64 bytenr, u64 num_bytes, u64 parent,
2487 u64 root_objectid, u64 ref_generation,
2488 u64 owner_objectid);
2489 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2490 struct btrfs_root *root, u64 bytenr,
2491 u64 orig_parent, u64 parent,
2492 u64 root_objectid, u64 ref_generation,
2493 u64 owner_objectid);
2494 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2495 struct btrfs_root *root);
2496 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2497 int btrfs_read_block_groups(struct btrfs_root *root);
2498 struct btrfs_block_group_cache *
2499 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2500 u64 chunk_objectid, u64 chunk_offset, u64 size);
2501 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2502 struct btrfs_fs_info *fs_info, u64 bytes_used,
2503 u64 type, u64 chunk_objectid, u64 chunk_offset,
2505 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2506 struct btrfs_fs_info *fs_info);
2507 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2508 struct btrfs_root *root, u64 bytenr, u64 num,
2509 int alloc, int mark_free);
2510 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2511 struct btrfs_root *root, u64 objectid,
2512 struct btrfs_inode_item *inode,
2513 u64 file_pos, u64 disk_bytenr,
2515 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2516 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2517 void free_excluded_extents(struct btrfs_root *root,
2518 struct btrfs_block_group_cache *cache);
2519 int exclude_super_stripes(struct btrfs_root *root,
2520 struct btrfs_block_group_cache *cache);
2521 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2522 struct btrfs_fs_info *info, u64 start, u64 end);
2523 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2526 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2527 int btrfs_del_ptr(struct btrfs_root *root, struct btrfs_path *path,
2528 int level, int slot);
2529 enum btrfs_tree_block_status
2530 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2531 struct extent_buffer *buf);
2532 enum btrfs_tree_block_status
2533 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2534 struct extent_buffer *buf);
2535 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2536 int level, int slot, u64 objectid);
2537 struct extent_buffer *read_node_slot(struct btrfs_fs_info *fs_info,
2538 struct extent_buffer *parent, int slot);
2539 int btrfs_previous_item(struct btrfs_root *root,
2540 struct btrfs_path *path, u64 min_objectid,
2542 int btrfs_previous_extent_item(struct btrfs_root *root,
2543 struct btrfs_path *path, u64 min_objectid);
2544 int btrfs_next_extent_item(struct btrfs_root *root,
2545 struct btrfs_path *path, u64 max_objectid);
2546 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2547 struct btrfs_root *root, struct extent_buffer *buf,
2548 struct extent_buffer *parent, int parent_slot,
2549 struct extent_buffer **cow_ret);
2550 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2551 struct btrfs_root *root,
2552 struct extent_buffer *buf,
2553 struct extent_buffer *parent, int parent_slot,
2554 struct extent_buffer **cow_ret,
2555 u64 search_start, u64 empty_size);
2556 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2557 struct btrfs_root *root,
2558 struct extent_buffer *buf,
2559 struct extent_buffer **cow_ret, u64 new_root_objectid);
2560 int btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
2562 int btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
2563 u32 new_size, int from_end);
2564 int btrfs_split_item(struct btrfs_trans_handle *trans,
2565 struct btrfs_root *root,
2566 struct btrfs_path *path,
2567 struct btrfs_key *new_key,
2568 unsigned long split_offset);
2569 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2570 *root, struct btrfs_key *key, struct btrfs_path *p, int
2572 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2573 u64 iobjectid, u64 ioff, u8 key_type,
2574 struct btrfs_key *found_key);
2575 void btrfs_release_path(struct btrfs_path *p);
2576 void add_root_to_dirty_list(struct btrfs_root *root);
2577 struct btrfs_path *btrfs_alloc_path(void);
2578 void btrfs_free_path(struct btrfs_path *p);
2579 void btrfs_init_path(struct btrfs_path *p);
2580 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2581 struct btrfs_path *path, int slot, int nr);
2583 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2584 struct btrfs_root *root,
2585 struct btrfs_path *path)
2587 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2590 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2591 *root, struct btrfs_key *key, void *data, u32 data_size);
2592 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2593 struct btrfs_root *root,
2594 struct btrfs_path *path,
2595 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2597 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2598 struct btrfs_root *root,
2599 struct btrfs_path *path,
2600 struct btrfs_key *key,
2603 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2606 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2607 static inline int btrfs_next_item(struct btrfs_root *root,
2608 struct btrfs_path *p)
2611 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2612 return btrfs_next_leaf(root, p);
2616 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2617 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2618 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2619 struct btrfs_disk_key *key, int level);
2620 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2621 struct btrfs_key *new_key);
2622 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2623 struct btrfs_path *path,
2624 struct btrfs_key *new_key);
2627 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2628 struct btrfs_root *tree_root,
2629 u64 root_id, u8 type, u64 ref_id,
2630 u64 dirid, u64 sequence,
2631 const char *name, int name_len);
2632 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2633 *root, struct btrfs_key *key, struct btrfs_root_item
2635 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2636 struct btrfs_key *key);
2637 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2638 *root, struct btrfs_key *key, struct btrfs_root_item
2640 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2641 btrfs_root_item *item, struct btrfs_key *key);
2643 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2644 *root, const char *name, int name_len, u64 dir,
2645 struct btrfs_key *location, u8 type, u64 index);
2646 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2647 struct btrfs_root *root,
2648 struct btrfs_path *path, u64 dir,
2649 const char *name, int name_len,
2651 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2652 struct btrfs_root *root,
2653 struct btrfs_path *path, u64 dir,
2654 const char *name, int name_len,
2655 u64 index, int mod);
2656 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2657 struct btrfs_root *root,
2658 struct btrfs_path *path,
2659 struct btrfs_dir_item *di);
2660 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2661 struct btrfs_root *root, const char *name,
2662 u16 name_len, const void *data, u16 data_len,
2665 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2666 struct btrfs_root *fs_root,
2667 u64 dirid, u64 *objectid);
2670 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2671 struct btrfs_root *root,
2672 const char *name, int name_len,
2673 u64 inode_objectid, u64 ref_objectid, u64 index);
2674 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2675 *root, u64 objectid, struct btrfs_inode_item
2677 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2678 *root, struct btrfs_path *path,
2679 struct btrfs_key *location, int mod);
2680 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2681 *trans, struct btrfs_path *path, struct btrfs_root *root,
2682 u64 ino, u64 parent_ino, u64 index, const char *name,
2683 int namelen, int ins_len);
2684 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2685 struct btrfs_root *root,
2686 const char *name, int name_len,
2687 u64 inode_objectid, u64 ref_objectid,
2689 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2690 struct btrfs_root *root,
2691 const char *name, int name_len,
2692 u64 inode_objectid, u64 ref_objectid, u64 index);
2693 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2694 struct btrfs_root *root, struct btrfs_path *path,
2695 const char *name, int namelen, u64 ino, u64 parent_ino,
2697 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2698 struct btrfs_root *root, const char *name, int name_len,
2699 u64 ino, u64 parent_ino, u64 *index);
2702 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2703 struct btrfs_root *root, u64 bytenr, u64 len);
2704 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2705 struct btrfs_root *root,
2706 u64 objectid, u64 pos, u64 offset,
2709 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2710 struct btrfs_root *root, u64 objectid,
2711 u64 offset, const char *buffer, size_t size);
2712 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2713 struct btrfs_root *root, u64 alloc_end,
2714 u64 bytenr, char *data, size_t len);
2715 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2716 struct btrfs_root *root, struct btrfs_path *path,
2720 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2721 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2724 static inline int is_fstree(u64 rootid)
2726 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2727 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2733 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2734 u64 dir, u64 index);
2735 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2737 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2738 struct btrfs_root *root, u64 ino, u64 flags);
2739 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2740 u64 ino, u64 parent_ino, char *name, int namelen,
2741 u8 type, u64 *index, int add_backref);
2742 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2743 u64 ino, u64 parent_ino, u64 index, const char *name,
2744 int namelen, int add_orphan);
2745 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2746 struct btrfs_root *root, struct btrfs_path *path,
2748 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2749 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2750 struct btrfs_root *btrfs_mksubvol(struct btrfs_root *root, const char *base,
2751 u64 root_objectid, bool convert);
2754 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2755 struct btrfs_root *root,
2756 struct btrfs_path *path,
2757 u64 ino, u64 offset, u64 len, int ins_len);
2758 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2759 struct btrfs_root *root,
2760 u64 ino, u64 offset, u64 len);
2761 int btrfs_read_file(struct btrfs_root *root, u64 ino, u64 start, int len,