2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE_H__
20 #define __BTRFS_CTREE_H__
22 #if BTRFS_FLAT_INCLUDES
24 #include "kerncompat.h"
25 #include "radix-tree.h"
26 #include "extent-cache.h"
27 #include "extent_io.h"
31 #include <btrfs/list.h>
32 #include <btrfs/kerncompat.h>
33 #include <btrfs/radix-tree.h>
34 #include <btrfs/extent-cache.h>
35 #include <btrfs/extent_io.h>
36 #include <btrfs/ioctl.h>
37 #include <btrfs/sizes.h>
38 #endif /* BTRFS_FLAT_INCLUDES */
41 struct btrfs_trans_handle;
42 struct btrfs_free_space_ctl;
43 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
46 * Fake signature for an unfinalized filesystem, structures might be partially
49 #define BTRFS_MAGIC_PARTIAL 0x4D5F536652484221ULL /* ascii !BHRfS_M, no null */
51 #define BTRFS_MAX_MIRRORS 3
53 #define BTRFS_MAX_LEVEL 8
55 #define BTRFS_COMPAT_EXTENT_TREE_V0
57 /* holds pointers to all of the tree roots */
58 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
60 /* stores information about which extents are in use, and reference counts */
61 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
64 * chunk tree stores translations from logical -> physical block numbering
65 * the super block points to the chunk tree
67 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
70 * stores information about which areas of a given device are in use.
71 * one per device. The tree of tree roots points to the device tree
73 #define BTRFS_DEV_TREE_OBJECTID 4ULL
75 /* one per subvolume, storing files and directories */
76 #define BTRFS_FS_TREE_OBJECTID 5ULL
78 /* directory objectid inside the root tree */
79 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
80 /* holds checksums of all the data extents */
81 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
82 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
84 /* for storing items that use the BTRFS_UUID_KEY* */
85 #define BTRFS_UUID_TREE_OBJECTID 9ULL
87 /* tracks free space in block groups. */
88 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
90 /* device stats in the device tree */
91 #define BTRFS_DEV_STATS_OBJECTID 0ULL
93 /* for storing balance parameters in the root tree */
94 #define BTRFS_BALANCE_OBJECTID -4ULL
96 /* oprhan objectid for tracking unlinked/truncated files */
97 #define BTRFS_ORPHAN_OBJECTID -5ULL
99 /* does write ahead logging to speed up fsyncs */
100 #define BTRFS_TREE_LOG_OBJECTID -6ULL
101 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
103 /* space balancing */
104 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
105 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
108 * extent checksums all have this objectid
109 * this allows them to share the logging tree
112 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
114 /* For storing free space cache */
115 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
118 * The inode number assigned to the special inode for sotring
121 #define BTRFS_FREE_INO_OBJECTID -12ULL
123 /* dummy objectid represents multiple objectids */
124 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
127 * All files have objectids in this range.
129 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
130 #define BTRFS_LAST_FREE_OBJECTID -256ULL
131 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
136 * the device items go into the chunk tree. The key is in the form
137 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
139 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
141 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2ULL
144 * the max metadata block size. This limit is somewhat artificial,
145 * but the memmove costs go through the roof for larger blocks.
147 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
150 * we can actually store much bigger names, but lets not confuse the rest
153 #define BTRFS_NAME_LEN 255
156 * Theoretical limit is larger, but we keep this down to a sane
157 * value. That should limit greatly the possibility of collisions on
160 #define BTRFS_LINK_MAX 65535U
162 /* 32 bytes in various csum fields */
163 #define BTRFS_CSUM_SIZE 32
166 #define BTRFS_CSUM_TYPE_CRC32 0
168 static int btrfs_csum_sizes[] = { 4 };
170 /* four bytes for CRC32 */
171 #define BTRFS_CRC32_SIZE 4
172 #define BTRFS_EMPTY_DIR_SIZE 0
174 #define BTRFS_FT_UNKNOWN 0
175 #define BTRFS_FT_REG_FILE 1
176 #define BTRFS_FT_DIR 2
177 #define BTRFS_FT_CHRDEV 3
178 #define BTRFS_FT_BLKDEV 4
179 #define BTRFS_FT_FIFO 5
180 #define BTRFS_FT_SOCK 6
181 #define BTRFS_FT_SYMLINK 7
182 #define BTRFS_FT_XATTR 8
183 #define BTRFS_FT_MAX 9
185 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
188 * the key defines the order in the tree, and so it also defines (optimal)
189 * block layout. objectid corresponds to the inode number. The flags
190 * tells us things about the object, and is a kind of stream selector.
191 * so for a given inode, keys with flags of 1 might refer to the inode
192 * data, flags of 2 may point to file data in the btree and flags == 3
193 * may point to extents.
195 * offset is the starting byte offset for this key in the stream.
197 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
198 * in cpu native order. Otherwise they are identical and their sizes
199 * should be the same (ie both packed)
201 struct btrfs_disk_key {
205 } __attribute__ ((__packed__));
211 } __attribute__ ((__packed__));
213 struct btrfs_mapping_tree {
214 struct cache_tree cache_tree;
217 #define BTRFS_UUID_SIZE 16
218 struct btrfs_dev_item {
219 /* the internal btrfs device id */
222 /* size of the device */
228 /* optimal io alignment for this device */
231 /* optimal io width for this device */
234 /* minimal io size for this device */
237 /* type and info about this device */
240 /* expected generation for this device */
244 * starting byte of this partition on the device,
245 * to allow for stripe alignment in the future
249 /* grouping information for allocation decisions */
252 /* seek speed 0-100 where 100 is fastest */
255 /* bandwidth 0-100 where 100 is fastest */
258 /* btrfs generated uuid for this device */
259 u8 uuid[BTRFS_UUID_SIZE];
261 /* uuid of FS who owns this device */
262 u8 fsid[BTRFS_UUID_SIZE];
263 } __attribute__ ((__packed__));
265 struct btrfs_stripe {
268 u8 dev_uuid[BTRFS_UUID_SIZE];
269 } __attribute__ ((__packed__));
272 /* size of this chunk in bytes */
275 /* objectid of the root referencing this chunk */
281 /* optimal io alignment for this chunk */
284 /* optimal io width for this chunk */
287 /* minimal io size for this chunk */
290 /* 2^16 stripes is quite a lot, a second limit is the size of a single
295 /* sub stripes only matter for raid10 */
297 struct btrfs_stripe stripe;
298 /* additional stripes go here */
299 } __attribute__ ((__packed__));
301 #define BTRFS_FREE_SPACE_EXTENT 1
302 #define BTRFS_FREE_SPACE_BITMAP 2
304 struct btrfs_free_space_entry {
308 } __attribute__ ((__packed__));
310 struct btrfs_free_space_header {
311 struct btrfs_disk_key location;
315 } __attribute__ ((__packed__));
317 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
319 BUG_ON(num_stripes == 0);
320 return sizeof(struct btrfs_chunk) +
321 sizeof(struct btrfs_stripe) * (num_stripes - 1);
324 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
325 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
326 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
327 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
328 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
329 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
331 #define BTRFS_BACKREF_REV_MAX 256
332 #define BTRFS_BACKREF_REV_SHIFT 56
333 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
334 BTRFS_BACKREF_REV_SHIFT)
336 #define BTRFS_OLD_BACKREF_REV 0
337 #define BTRFS_MIXED_BACKREF_REV 1
340 * every tree block (leaf or node) starts with this header.
342 struct btrfs_header {
343 /* these first four must match the super block */
344 u8 csum[BTRFS_CSUM_SIZE];
345 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
346 __le64 bytenr; /* which block this node is supposed to live in */
349 /* allowed to be different from the super from here on down */
350 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
355 } __attribute__ ((__packed__));
357 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->fs_info->nodesize - \
358 sizeof(struct btrfs_header)) / \
359 sizeof(struct btrfs_key_ptr))
360 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
361 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->fs_info->nodesize))
362 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
363 sizeof(struct btrfs_item) - \
364 sizeof(struct btrfs_file_extent_item))
365 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
366 sizeof(struct btrfs_item) -\
367 sizeof(struct btrfs_dir_item))
371 * this is a very generous portion of the super block, giving us
372 * room to translate 14 chunks with 3 stripes each.
374 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
375 #define BTRFS_LABEL_SIZE 256
378 * just in case we somehow lose the roots and are not able to mount,
379 * we store an array of the roots from previous transactions
382 #define BTRFS_NUM_BACKUP_ROOTS 4
383 struct btrfs_root_backup {
385 __le64 tree_root_gen;
388 __le64 chunk_root_gen;
391 __le64 extent_root_gen;
400 __le64 csum_root_gen;
410 u8 extent_root_level;
414 /* future and to align */
416 } __attribute__ ((__packed__));
419 * the super block basically lists the main trees of the FS
420 * it currently lacks any block count etc etc
422 struct btrfs_super_block {
423 u8 csum[BTRFS_CSUM_SIZE];
424 /* the first 3 fields must match struct btrfs_header */
425 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
426 __le64 bytenr; /* this block number */
429 /* allowed to be different from the btrfs_header from here own down */
436 /* this will help find the new super based on the log root */
437 __le64 log_root_transid;
440 __le64 root_dir_objectid;
444 /* Unused and must be equal to nodesize */
445 __le32 __unused_leafsize;
447 __le32 sys_chunk_array_size;
448 __le64 chunk_root_generation;
450 __le64 compat_ro_flags;
451 __le64 incompat_flags;
456 struct btrfs_dev_item dev_item;
458 char label[BTRFS_LABEL_SIZE];
460 __le64 cache_generation;
461 __le64 uuid_tree_generation;
463 /* future expansion */
465 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
466 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
467 } __attribute__ ((__packed__));
470 * Compat flags that we support. If any incompat flags are set other than the
471 * ones specified below then we will fail to mount
473 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
475 * Older kernels on big-endian systems produced broken free space tree bitmaps,
476 * and btrfs-progs also used to corrupt the free space tree. If this bit is
477 * clear, then the free space tree cannot be trusted. btrfs-progs can also
478 * intentionally clear this bit to ask the kernel to rebuild the free space
481 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
483 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
484 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
485 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
486 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
487 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)
490 * older kernels tried to do bigger metadata blocks, but the
491 * code was pretty buggy. Lets not let them try anymore.
493 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
494 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
495 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
496 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
497 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
499 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
502 * The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be
503 * added here until read-write support for the free space tree is implemented in
506 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
508 #define BTRFS_FEATURE_INCOMPAT_SUPP \
509 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
510 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
511 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
512 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
513 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
514 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
515 BTRFS_FEATURE_INCOMPAT_RAID56 | \
516 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
517 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
518 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
521 * A leaf is full of items. offset and size tell us where to find
522 * the item in the leaf (relative to the start of the data area)
525 struct btrfs_disk_key key;
528 } __attribute__ ((__packed__));
531 * leaves have an item area and a data area:
532 * [item0, item1....itemN] [free space] [dataN...data1, data0]
534 * The data is separate from the items to get the keys closer together
538 struct btrfs_header header;
539 struct btrfs_item items[];
540 } __attribute__ ((__packed__));
543 * all non-leaf blocks are nodes, they hold only keys and pointers to
546 struct btrfs_key_ptr {
547 struct btrfs_disk_key key;
550 } __attribute__ ((__packed__));
553 struct btrfs_header header;
554 struct btrfs_key_ptr ptrs[];
555 } __attribute__ ((__packed__));
558 * btrfs_paths remember the path taken from the root down to the leaf.
559 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
560 * to any other levels that are present.
562 * The slots array records the index of the item or block pointer
563 * used while walking the tree.
567 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
568 int slots[BTRFS_MAX_LEVEL];
570 /* The kernel locking sheme is not done in userspace. */
571 int locks[BTRFS_MAX_LEVEL];
574 /* keep some upper locks as we walk down */
578 * set by btrfs_split_item, tells search_slot to keep all locks
579 * and to force calls to keep space in the nodes
586 * items in the extent btree are used to record the objectid of the
587 * owner of the block and the number of references
590 struct btrfs_extent_item {
594 } __attribute__ ((__packed__));
596 struct btrfs_extent_item_v0 {
598 } __attribute__ ((__packed__));
600 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
601 sizeof(struct btrfs_item))
602 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
604 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
605 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
607 /* following flags only apply to tree blocks */
609 /* use full backrefs for extent pointers in the block*/
610 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
612 struct btrfs_tree_block_info {
613 struct btrfs_disk_key key;
615 } __attribute__ ((__packed__));
617 struct btrfs_extent_data_ref {
622 } __attribute__ ((__packed__));
624 struct btrfs_shared_data_ref {
626 } __attribute__ ((__packed__));
628 struct btrfs_extent_inline_ref {
631 } __attribute__ ((__packed__));
633 struct btrfs_extent_ref_v0 {
638 } __attribute__ ((__packed__));
640 /* dev extents record free space on individual devices. The owner
641 * field points back to the chunk allocation mapping tree that allocated
642 * the extent. The chunk tree uuid field is a way to double check the owner
644 struct btrfs_dev_extent {
646 __le64 chunk_objectid;
649 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
650 } __attribute__ ((__packed__));
652 struct btrfs_inode_ref {
656 } __attribute__ ((__packed__));
658 struct btrfs_inode_extref {
659 __le64 parent_objectid;
662 __u8 name[0]; /* name goes here */
663 } __attribute__ ((__packed__));
665 struct btrfs_timespec {
668 } __attribute__ ((__packed__));
671 BTRFS_COMPRESS_NONE = 0,
672 BTRFS_COMPRESS_ZLIB = 1,
673 BTRFS_COMPRESS_LZO = 2,
674 BTRFS_COMPRESS_ZSTD = 3,
675 BTRFS_COMPRESS_TYPES = 3,
676 BTRFS_COMPRESS_LAST = 4,
677 } btrfs_compression_type;
679 /* we don't understand any encryption methods right now */
681 BTRFS_ENCRYPTION_NONE = 0,
682 BTRFS_ENCRYPTION_LAST = 1,
683 } btrfs_encryption_type;
685 enum btrfs_tree_block_status {
686 BTRFS_TREE_BLOCK_CLEAN,
687 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
688 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
689 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
690 BTRFS_TREE_BLOCK_INVALID_LEVEL,
691 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
692 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
695 struct btrfs_inode_item {
696 /* nfs style generation number */
698 /* transid that last touched this inode */
710 /* modification sequence number for NFS */
714 * a little future expansion, for more than this we can
715 * just grow the inode item and version it
718 struct btrfs_timespec atime;
719 struct btrfs_timespec ctime;
720 struct btrfs_timespec mtime;
721 struct btrfs_timespec otime;
722 } __attribute__ ((__packed__));
724 struct btrfs_dir_log_item {
726 } __attribute__ ((__packed__));
728 struct btrfs_dir_item {
729 struct btrfs_disk_key location;
734 } __attribute__ ((__packed__));
736 struct btrfs_root_item_v0 {
737 struct btrfs_inode_item inode;
743 __le64 last_snapshot;
746 struct btrfs_disk_key drop_progress;
749 } __attribute__ ((__packed__));
751 struct btrfs_root_item {
752 struct btrfs_inode_item inode;
758 __le64 last_snapshot;
761 struct btrfs_disk_key drop_progress;
766 * The following fields appear after subvol_uuids+subvol_times
771 * This generation number is used to test if the new fields are valid
772 * and up to date while reading the root item. Every time the root item
773 * is written out, the "generation" field is copied into this field. If
774 * anyone ever mounted the fs with an older kernel, we will have
775 * mismatching generation values here and thus must invalidate the
776 * new fields. See btrfs_update_root and btrfs_find_last_root for
778 * the offset of generation_v2 is also used as the start for the memset
779 * when invalidating the fields.
781 __le64 generation_v2;
782 u8 uuid[BTRFS_UUID_SIZE];
783 u8 parent_uuid[BTRFS_UUID_SIZE];
784 u8 received_uuid[BTRFS_UUID_SIZE];
785 __le64 ctransid; /* updated when an inode changes */
786 __le64 otransid; /* trans when created */
787 __le64 stransid; /* trans when sent. non-zero for received subvol */
788 __le64 rtransid; /* trans when received. non-zero for received subvol */
789 struct btrfs_timespec ctime;
790 struct btrfs_timespec otime;
791 struct btrfs_timespec stime;
792 struct btrfs_timespec rtime;
793 __le64 reserved[8]; /* for future */
794 } __attribute__ ((__packed__));
797 * this is used for both forward and backward root refs
799 struct btrfs_root_ref {
803 } __attribute__ ((__packed__));
805 struct btrfs_disk_balance_args {
807 * profiles to operate on, single is denoted by
808 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
814 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
815 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
828 /* devid subset filter [pstart..pend) */
832 /* btrfs virtual address space subset filter [vstart..vend) */
837 * profile to convert to, single is denoted by
838 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
842 /* BTRFS_BALANCE_ARGS_* */
846 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
847 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
859 * Process chunks that cross stripes_min..stripes_max devices,
860 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
866 } __attribute__ ((__packed__));
869 * store balance parameters to disk so that balance can be properly
870 * resumed after crash or unmount
872 struct btrfs_balance_item {
873 /* BTRFS_BALANCE_* */
876 struct btrfs_disk_balance_args data;
877 struct btrfs_disk_balance_args meta;
878 struct btrfs_disk_balance_args sys;
881 } __attribute__ ((__packed__));
883 #define BTRFS_FILE_EXTENT_INLINE 0
884 #define BTRFS_FILE_EXTENT_REG 1
885 #define BTRFS_FILE_EXTENT_PREALLOC 2
887 struct btrfs_file_extent_item {
889 * transaction id that created this extent
893 * max number of bytes to hold this extent in ram
894 * when we split a compressed extent we can't know how big
895 * each of the resulting pieces will be. So, this is
896 * an upper limit on the size of the extent in ram instead of
902 * 32 bits for the various ways we might encode the data,
903 * including compression and encryption. If any of these
904 * are set to something a given disk format doesn't understand
905 * it is treated like an incompat flag for reading and writing,
910 __le16 other_encoding; /* spare for later use */
912 /* are we inline data or a real extent? */
916 * disk space consumed by the extent, checksum blocks are included
920 __le64 disk_num_bytes;
922 * the logical offset in file blocks (no csums)
923 * this extent record is for. This allows a file extent to point
924 * into the middle of an existing extent on disk, sharing it
925 * between two snapshots (useful if some bytes in the middle of the
926 * extent have changed
930 * the logical number of file blocks (no csums included)
934 } __attribute__ ((__packed__));
936 struct btrfs_dev_stats_item {
938 * grow this item struct at the end for future enhancements and keep
939 * the existing values unchanged
941 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
942 } __attribute__ ((__packed__));
944 struct btrfs_csum_item {
946 } __attribute__ ((__packed__));
949 * We don't want to overwrite 1M at the beginning of device, even though
950 * there is our 1st superblock at 64k. Some possible reasons:
951 * - the first 64k blank is useful for some boot loader/manager
952 * - the first 1M could be scratched by buggy partitioner or somesuch
954 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)SZ_1M)
956 /* tag for the radix tree of block groups in ram */
957 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
958 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
959 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
960 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
961 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
962 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
963 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
964 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
965 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
966 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
967 #define BTRFS_NR_RAID_TYPES 7
969 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
970 BTRFS_BLOCK_GROUP_SYSTEM | \
971 BTRFS_BLOCK_GROUP_METADATA)
973 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
974 BTRFS_BLOCK_GROUP_RAID1 | \
975 BTRFS_BLOCK_GROUP_RAID5 | \
976 BTRFS_BLOCK_GROUP_RAID6 | \
977 BTRFS_BLOCK_GROUP_DUP | \
978 BTRFS_BLOCK_GROUP_RAID10)
980 /* used in struct btrfs_balance_args fields */
981 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
984 * GLOBAL_RSV does not exist as a on-disk block group type and is used
985 * internally for exporting info about global block reserve from space infos
987 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
989 #define BTRFS_QGROUP_LEVEL_SHIFT 48
991 static inline u64 btrfs_qgroup_level(u64 qgroupid)
993 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
996 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
998 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
1001 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1002 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1003 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1005 struct btrfs_qgroup_status_item {
1009 __le64 rescan; /* progress during scanning */
1010 } __attribute__ ((__packed__));
1012 struct btrfs_block_group_item {
1014 __le64 chunk_objectid;
1016 } __attribute__ ((__packed__));
1018 struct btrfs_free_space_info {
1019 __le32 extent_count;
1021 } __attribute__ ((__packed__));
1023 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1025 struct btrfs_qgroup_info_item {
1028 __le64 referenced_compressed;
1030 __le64 exclusive_compressed;
1031 } __attribute__ ((__packed__));
1033 /* flags definition for qgroup limits */
1034 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1035 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1036 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1037 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1038 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1039 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1041 struct btrfs_qgroup_limit_item {
1043 __le64 max_referenced;
1044 __le64 max_exclusive;
1045 __le64 rsv_referenced;
1046 __le64 rsv_exclusive;
1047 } __attribute__ ((__packed__));
1049 struct btrfs_space_info {
1055 struct list_head list;
1058 struct btrfs_block_group_cache {
1059 struct cache_extent cache;
1060 struct btrfs_key key;
1061 struct btrfs_block_group_item item;
1062 struct btrfs_space_info *space_info;
1063 struct btrfs_free_space_ctl *free_space_ctl;
1071 struct btrfs_device;
1072 struct btrfs_fs_devices;
1073 struct btrfs_fs_info {
1074 u8 fsid[BTRFS_FSID_SIZE];
1076 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1077 u8 *new_chunk_tree_uuid;
1078 struct btrfs_root *fs_root;
1079 struct btrfs_root *extent_root;
1080 struct btrfs_root *tree_root;
1081 struct btrfs_root *chunk_root;
1082 struct btrfs_root *dev_root;
1083 struct btrfs_root *csum_root;
1084 struct btrfs_root *quota_root;
1085 struct btrfs_root *free_space_root;
1087 struct rb_root fs_root_tree;
1089 /* the log root tree is a directory of all the other log roots */
1090 struct btrfs_root *log_root_tree;
1092 struct extent_io_tree extent_cache;
1093 struct extent_io_tree free_space_cache;
1094 struct extent_io_tree block_group_cache;
1095 struct extent_io_tree pinned_extents;
1096 struct extent_io_tree pending_del;
1097 struct extent_io_tree extent_ins;
1098 struct extent_io_tree *excluded_extents;
1100 /* logical->physical extent mapping */
1101 struct btrfs_mapping_tree mapping_tree;
1104 u64 last_trans_committed;
1106 u64 avail_data_alloc_bits;
1107 u64 avail_metadata_alloc_bits;
1108 u64 avail_system_alloc_bits;
1109 u64 data_alloc_profile;
1110 u64 metadata_alloc_profile;
1111 u64 system_alloc_profile;
1114 struct btrfs_trans_handle *running_transaction;
1115 struct btrfs_super_block *super_copy;
1116 struct mutex fs_mutex;
1121 struct list_head dirty_cowonly_roots;
1122 struct list_head recow_ebs;
1124 struct btrfs_fs_devices *fs_devices;
1125 struct list_head space_info;
1127 unsigned int system_allocs:1;
1128 unsigned int readonly:1;
1129 unsigned int on_restoring:1;
1130 unsigned int is_chunk_recover:1;
1131 unsigned int quota_enabled:1;
1132 unsigned int suppress_check_block_errors:1;
1133 unsigned int ignore_fsid_mismatch:1;
1134 unsigned int ignore_chunk_tree_error:1;
1135 unsigned int avoid_meta_chunk_alloc:1;
1136 unsigned int avoid_sys_chunk_alloc:1;
1137 unsigned int finalize_on_close:1;
1139 int transaction_aborted;
1141 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1142 struct btrfs_root *root,
1143 u64 bytenr, u64 num_bytes, u64 parent,
1144 u64 root_objectid, u64 owner, u64 offset,
1146 struct cache_tree *fsck_extent_cache;
1147 struct cache_tree *corrupt_blocks;
1149 /* Cached block sizes */
1156 * in ram representation of the tree. extent_root is used for all allocations
1157 * and for the extent tree extent_root root.
1160 struct extent_buffer *node;
1161 struct extent_buffer *commit_root;
1162 struct btrfs_root_item root_item;
1163 struct btrfs_key root_key;
1164 struct btrfs_fs_info *fs_info;
1173 u64 last_inode_alloc;
1176 * Record orphan data extent ref
1178 * TODO: Don't restore things in btrfs_root.
1179 * Directly record it into inode_record, which needs a lot of
1180 * infrastructure change to allow cooperation between extent
1183 struct list_head orphan_data_extents;
1185 /* the dirty list is only used by non-reference counted roots */
1186 struct list_head dirty_list;
1187 struct rb_node rb_node;
1191 * inode items have the data typically returned from stat and store other
1192 * info about object characteristics. There is one for every file and dir in
1195 #define BTRFS_INODE_ITEM_KEY 1
1196 #define BTRFS_INODE_REF_KEY 12
1197 #define BTRFS_INODE_EXTREF_KEY 13
1198 #define BTRFS_XATTR_ITEM_KEY 24
1199 #define BTRFS_ORPHAN_ITEM_KEY 48
1201 #define BTRFS_DIR_LOG_ITEM_KEY 60
1202 #define BTRFS_DIR_LOG_INDEX_KEY 72
1204 * dir items are the name -> inode pointers in a directory. There is one
1205 * for every name in a directory.
1207 #define BTRFS_DIR_ITEM_KEY 84
1208 #define BTRFS_DIR_INDEX_KEY 96
1211 * extent data is for file data
1213 #define BTRFS_EXTENT_DATA_KEY 108
1216 * csum items have the checksums for data in the extents
1218 #define BTRFS_CSUM_ITEM_KEY 120
1220 * extent csums are stored in a separate tree and hold csums for
1221 * an entire extent on disk.
1223 #define BTRFS_EXTENT_CSUM_KEY 128
1226 * root items point to tree roots. There are typically in the root
1227 * tree used by the super block to find all the other trees
1229 #define BTRFS_ROOT_ITEM_KEY 132
1232 * root backrefs tie subvols and snapshots to the directory entries that
1235 #define BTRFS_ROOT_BACKREF_KEY 144
1238 * root refs make a fast index for listing all of the snapshots and
1239 * subvolumes referenced by a given root. They point directly to the
1240 * directory item in the root that references the subvol
1242 #define BTRFS_ROOT_REF_KEY 156
1245 * extent items are in the extent map tree. These record which blocks
1246 * are used, and how many references there are to each block
1248 #define BTRFS_EXTENT_ITEM_KEY 168
1251 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1252 * the length, so we save the level in key->offset instead of the length.
1254 #define BTRFS_METADATA_ITEM_KEY 169
1256 #define BTRFS_TREE_BLOCK_REF_KEY 176
1258 #define BTRFS_EXTENT_DATA_REF_KEY 178
1260 /* old style extent backrefs */
1261 #define BTRFS_EXTENT_REF_V0_KEY 180
1263 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1265 #define BTRFS_SHARED_DATA_REF_KEY 184
1269 * block groups give us hints into the extent allocation trees. Which
1270 * blocks are free etc etc
1272 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1275 * Every block group is represented in the free space tree by a free space info
1276 * item, which stores some accounting information. It is keyed on
1277 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1279 #define BTRFS_FREE_SPACE_INFO_KEY 198
1282 * A free space extent tracks an extent of space that is free in a block group.
1283 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1285 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1288 * When a block group becomes very fragmented, we convert it to use bitmaps
1289 * instead of extents. A free space bitmap is keyed on
1290 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1291 * (length / sectorsize) bits.
1293 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1295 #define BTRFS_DEV_EXTENT_KEY 204
1296 #define BTRFS_DEV_ITEM_KEY 216
1297 #define BTRFS_CHUNK_ITEM_KEY 228
1299 #define BTRFS_BALANCE_ITEM_KEY 248
1304 #define BTRFS_QGROUP_STATUS_KEY 240
1305 #define BTRFS_QGROUP_INFO_KEY 242
1306 #define BTRFS_QGROUP_LIMIT_KEY 244
1307 #define BTRFS_QGROUP_RELATION_KEY 246
1310 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1312 #define BTRFS_BALANCE_ITEM_KEY 248
1315 * The key type for tree items that are stored persistently, but do not need to
1316 * exist for extended period of time. The items can exist in any tree.
1318 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1322 * - balance status item
1323 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1325 #define BTRFS_TEMPORARY_ITEM_KEY 248
1328 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1330 #define BTRFS_DEV_STATS_KEY 249
1333 * The key type for tree items that are stored persistently and usually exist
1334 * for a long period, eg. filesystem lifetime. The item kinds can be status
1335 * information, stats or preference values. The item can exist in any tree.
1337 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1341 * - device statistics, store IO stats in the device tree, one key for all
1343 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1345 #define BTRFS_PERSISTENT_ITEM_KEY 249
1348 * Persistently stores the device replace state in the device tree.
1349 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1351 #define BTRFS_DEV_REPLACE_KEY 250
1354 * Stores items that allow to quickly map UUIDs to something else.
1355 * These items are part of the filesystem UUID tree.
1356 * The key is built like this:
1357 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1359 #if BTRFS_UUID_SIZE != 16
1360 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1362 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1363 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1364 * received subvols */
1367 * string items are for debugging. They just store a short string of
1370 #define BTRFS_STRING_ITEM_KEY 253
1374 #define BTRFS_INODE_NODATASUM (1 << 0)
1375 #define BTRFS_INODE_NODATACOW (1 << 1)
1376 #define BTRFS_INODE_READONLY (1 << 2)
1377 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1378 #define BTRFS_INODE_PREALLOC (1 << 4)
1379 #define BTRFS_INODE_SYNC (1 << 5)
1380 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1381 #define BTRFS_INODE_APPEND (1 << 7)
1382 #define BTRFS_INODE_NODUMP (1 << 8)
1383 #define BTRFS_INODE_NOATIME (1 << 9)
1384 #define BTRFS_INODE_DIRSYNC (1 << 10)
1385 #define BTRFS_INODE_COMPRESS (1 << 11)
1387 #define read_eb_member(eb, ptr, type, member, result) ( \
1388 read_extent_buffer(eb, (char *)(result), \
1389 ((unsigned long)(ptr)) + \
1390 offsetof(type, member), \
1391 sizeof(((type *)0)->member)))
1393 #define write_eb_member(eb, ptr, type, member, result) ( \
1394 write_extent_buffer(eb, (char *)(result), \
1395 ((unsigned long)(ptr)) + \
1396 offsetof(type, member), \
1397 sizeof(((type *)0)->member)))
1399 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1400 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1402 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1403 return le##bits##_to_cpu(h->member); \
1405 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1408 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1409 h->member = cpu_to_le##bits(val); \
1412 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1413 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1416 unsigned long offset = (unsigned long)s; \
1417 const type *p = (type *) (eb->data + offset); \
1418 return get_unaligned_le##bits(&p->member); \
1420 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1421 type *s, u##bits val) \
1423 unsigned long offset = (unsigned long)s; \
1424 type *p = (type *) (eb->data + offset); \
1425 put_unaligned_le##bits(val, &p->member); \
1428 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1429 static inline u##bits btrfs_##name(const type *s) \
1431 return le##bits##_to_cpu(s->member); \
1433 static inline void btrfs_set_##name(type *s, u##bits val) \
1435 s->member = cpu_to_le##bits(val); \
1438 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1439 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1440 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1441 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1442 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1443 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1445 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1446 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1447 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1448 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1449 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1450 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1452 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1453 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1455 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1457 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1459 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1461 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1463 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1464 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1466 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1468 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1470 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1473 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1475 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1478 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1480 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1483 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1484 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1485 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1486 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1487 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1488 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1489 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1490 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1491 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1492 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1493 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1495 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1497 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1500 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1501 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1502 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1504 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1506 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1508 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1510 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1511 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1513 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1515 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1516 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1518 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1521 unsigned long offset = (unsigned long)c;
1522 offset += offsetof(struct btrfs_chunk, stripe);
1523 offset += nr * sizeof(struct btrfs_stripe);
1524 return (struct btrfs_stripe *)offset;
1527 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1529 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1532 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1533 struct btrfs_chunk *c, int nr)
1535 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1538 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1539 struct btrfs_chunk *c, int nr,
1542 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1545 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1546 struct btrfs_chunk *c, int nr)
1548 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1551 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1552 struct btrfs_chunk *c, int nr,
1555 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1558 /* struct btrfs_block_group_item */
1559 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1561 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1563 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1564 struct btrfs_block_group_item, chunk_objectid, 64);
1566 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1567 struct btrfs_block_group_item, chunk_objectid, 64);
1568 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1569 struct btrfs_block_group_item, flags, 64);
1570 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1571 struct btrfs_block_group_item, flags, 64);
1573 /* struct btrfs_free_space_info */
1574 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1576 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1578 /* struct btrfs_inode_ref */
1579 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1580 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1581 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1583 /* struct btrfs_inode_extref */
1584 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1585 parent_objectid, 64);
1586 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1588 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1590 /* struct btrfs_inode_item */
1591 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1592 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1593 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1594 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1595 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1596 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1597 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1598 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1599 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1600 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1601 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1602 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1604 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1605 struct btrfs_inode_item, generation, 64);
1606 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1607 struct btrfs_inode_item, sequence, 64);
1608 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1609 struct btrfs_inode_item, transid, 64);
1610 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1611 struct btrfs_inode_item, size, 64);
1612 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1613 struct btrfs_inode_item, nbytes, 64);
1614 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1615 struct btrfs_inode_item, block_group, 64);
1616 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1617 struct btrfs_inode_item, nlink, 32);
1618 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1619 struct btrfs_inode_item, uid, 32);
1620 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1621 struct btrfs_inode_item, gid, 32);
1622 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1623 struct btrfs_inode_item, mode, 32);
1624 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1625 struct btrfs_inode_item, rdev, 64);
1626 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1627 struct btrfs_inode_item, flags, 64);
1629 static inline struct btrfs_timespec *
1630 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1632 unsigned long ptr = (unsigned long)inode_item;
1633 ptr += offsetof(struct btrfs_inode_item, atime);
1634 return (struct btrfs_timespec *)ptr;
1637 static inline struct btrfs_timespec *
1638 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1640 unsigned long ptr = (unsigned long)inode_item;
1641 ptr += offsetof(struct btrfs_inode_item, mtime);
1642 return (struct btrfs_timespec *)ptr;
1645 static inline struct btrfs_timespec *
1646 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1648 unsigned long ptr = (unsigned long)inode_item;
1649 ptr += offsetof(struct btrfs_inode_item, ctime);
1650 return (struct btrfs_timespec *)ptr;
1653 static inline struct btrfs_timespec *
1654 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1656 unsigned long ptr = (unsigned long)inode_item;
1657 ptr += offsetof(struct btrfs_inode_item, otime);
1658 return (struct btrfs_timespec *)ptr;
1661 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1662 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1663 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1665 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1668 /* struct btrfs_dev_extent */
1669 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1671 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1672 chunk_objectid, 64);
1673 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1675 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1677 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1680 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1682 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1683 return (u8 *)((unsigned long)dev + ptr);
1687 /* struct btrfs_extent_item */
1688 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1689 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1690 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1692 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1693 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1695 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1697 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1699 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1700 struct btrfs_tree_block_info *item,
1701 struct btrfs_disk_key *key)
1703 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1706 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1707 struct btrfs_tree_block_info *item,
1708 struct btrfs_disk_key *key)
1710 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1713 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1715 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1717 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1719 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1722 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1725 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1727 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1729 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1730 struct btrfs_extent_inline_ref, type, 8);
1731 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1732 struct btrfs_extent_inline_ref, offset, 64);
1734 static inline u32 btrfs_extent_inline_ref_size(int type)
1736 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1737 type == BTRFS_SHARED_BLOCK_REF_KEY)
1738 return sizeof(struct btrfs_extent_inline_ref);
1739 if (type == BTRFS_SHARED_DATA_REF_KEY)
1740 return sizeof(struct btrfs_shared_data_ref) +
1741 sizeof(struct btrfs_extent_inline_ref);
1742 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1743 return sizeof(struct btrfs_extent_data_ref) +
1744 offsetof(struct btrfs_extent_inline_ref, offset);
1749 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1750 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1752 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1753 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1755 /* struct btrfs_node */
1756 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1757 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1759 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1762 ptr = offsetof(struct btrfs_node, ptrs) +
1763 sizeof(struct btrfs_key_ptr) * nr;
1764 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1767 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1771 ptr = offsetof(struct btrfs_node, ptrs) +
1772 sizeof(struct btrfs_key_ptr) * nr;
1773 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1776 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1779 ptr = offsetof(struct btrfs_node, ptrs) +
1780 sizeof(struct btrfs_key_ptr) * nr;
1781 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1784 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1788 ptr = offsetof(struct btrfs_node, ptrs) +
1789 sizeof(struct btrfs_key_ptr) * nr;
1790 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1793 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1795 return offsetof(struct btrfs_node, ptrs) +
1796 sizeof(struct btrfs_key_ptr) * nr;
1799 static inline void btrfs_node_key(struct extent_buffer *eb,
1800 struct btrfs_disk_key *disk_key, int nr)
1803 ptr = btrfs_node_key_ptr_offset(nr);
1804 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1805 struct btrfs_key_ptr, key, disk_key);
1808 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1809 struct btrfs_disk_key *disk_key, int nr)
1812 ptr = btrfs_node_key_ptr_offset(nr);
1813 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1814 struct btrfs_key_ptr, key, disk_key);
1817 /* struct btrfs_item */
1818 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1819 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1821 static inline unsigned long btrfs_item_nr_offset(int nr)
1823 return offsetof(struct btrfs_leaf, items) +
1824 sizeof(struct btrfs_item) * nr;
1827 static inline struct btrfs_item *btrfs_item_nr(int nr)
1829 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1832 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1833 struct btrfs_item *item)
1835 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1838 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1840 return btrfs_item_end(eb, btrfs_item_nr(nr));
1843 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1845 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1848 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1850 return btrfs_item_size(eb, btrfs_item_nr(nr));
1853 static inline void btrfs_item_key(struct extent_buffer *eb,
1854 struct btrfs_disk_key *disk_key, int nr)
1856 struct btrfs_item *item = btrfs_item_nr(nr);
1857 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1860 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1861 struct btrfs_disk_key *disk_key, int nr)
1863 struct btrfs_item *item = btrfs_item_nr(nr);
1864 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1867 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1870 * struct btrfs_root_ref
1872 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1873 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1874 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1876 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1877 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1878 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1880 /* struct btrfs_dir_item */
1881 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1882 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1883 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1884 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1886 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1887 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1888 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1889 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1891 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1892 struct btrfs_dir_item *item,
1893 struct btrfs_disk_key *key)
1895 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1898 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1899 struct btrfs_dir_item *item,
1900 struct btrfs_disk_key *key)
1902 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1905 /* struct btrfs_free_space_header */
1906 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1908 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1910 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1913 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1914 struct btrfs_free_space_header *h,
1915 struct btrfs_disk_key *key)
1917 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1920 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1921 struct btrfs_free_space_header *h,
1922 struct btrfs_disk_key *key)
1924 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1927 /* struct btrfs_disk_key */
1928 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1930 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1931 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1933 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1934 struct btrfs_disk_key *disk)
1936 cpu->offset = le64_to_cpu(disk->offset);
1937 cpu->type = disk->type;
1938 cpu->objectid = le64_to_cpu(disk->objectid);
1941 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1942 struct btrfs_key *cpu)
1944 disk->offset = cpu_to_le64(cpu->offset);
1945 disk->type = cpu->type;
1946 disk->objectid = cpu_to_le64(cpu->objectid);
1949 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1950 struct btrfs_key *key, int nr)
1952 struct btrfs_disk_key disk_key;
1953 btrfs_node_key(eb, &disk_key, nr);
1954 btrfs_disk_key_to_cpu(key, &disk_key);
1957 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1958 struct btrfs_key *key, int nr)
1960 struct btrfs_disk_key disk_key;
1961 btrfs_item_key(eb, &disk_key, nr);
1962 btrfs_disk_key_to_cpu(key, &disk_key);
1965 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1966 struct btrfs_dir_item *item,
1967 struct btrfs_key *key)
1969 struct btrfs_disk_key disk_key;
1970 btrfs_dir_item_key(eb, item, &disk_key);
1971 btrfs_disk_key_to_cpu(key, &disk_key);
1974 /* struct btrfs_header */
1975 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1976 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1978 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1979 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1980 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1981 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1982 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1983 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1985 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1986 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1989 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1991 return (btrfs_header_flags(eb) & flag) == flag;
1994 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1996 u64 flags = btrfs_header_flags(eb);
1997 btrfs_set_header_flags(eb, flags | flag);
1998 return (flags & flag) == flag;
2001 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2003 u64 flags = btrfs_header_flags(eb);
2004 btrfs_set_header_flags(eb, flags & ~flag);
2005 return (flags & flag) == flag;
2008 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2010 u64 flags = btrfs_header_flags(eb);
2011 return flags >> BTRFS_BACKREF_REV_SHIFT;
2014 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2017 u64 flags = btrfs_header_flags(eb);
2018 flags &= ~BTRFS_BACKREF_REV_MASK;
2019 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2020 btrfs_set_header_flags(eb, flags);
2023 static inline unsigned long btrfs_header_fsid(void)
2025 return offsetof(struct btrfs_header, fsid);
2028 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2030 return offsetof(struct btrfs_header, chunk_tree_uuid);
2033 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
2035 unsigned long ptr = offsetof(struct btrfs_header, csum);
2039 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2041 return (btrfs_header_level(eb) == 0);
2044 /* struct btrfs_root_item */
2045 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2047 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2048 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2049 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2051 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2053 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2054 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2055 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2056 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2057 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2058 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2059 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2060 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2062 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2064 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2066 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2068 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2070 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2073 /* struct btrfs_root_backup */
2074 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2076 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2078 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2079 tree_root_level, 8);
2081 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2083 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2084 chunk_root_gen, 64);
2085 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2086 chunk_root_level, 8);
2088 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2090 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2091 extent_root_gen, 64);
2092 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2093 extent_root_level, 8);
2095 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2097 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2099 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2102 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2104 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2106 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2109 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2111 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2113 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2114 csum_root_level, 8);
2115 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2117 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2119 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2122 /* struct btrfs_super_block */
2124 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2125 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2126 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2128 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2129 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2130 struct btrfs_super_block, sys_chunk_array_size, 32);
2131 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2132 struct btrfs_super_block, chunk_root_generation, 64);
2133 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2135 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2137 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2138 chunk_root_level, 8);
2139 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2141 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2142 log_root_transid, 64);
2143 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2145 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2147 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2149 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2151 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2153 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2155 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2156 root_dir_objectid, 64);
2157 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2159 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2161 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2162 compat_ro_flags, 64);
2163 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2164 incompat_flags, 64);
2165 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2167 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2168 cache_generation, 64);
2169 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2170 uuid_tree_generation, 64);
2171 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2173 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2175 int t = btrfs_super_csum_type(s);
2176 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2177 return btrfs_csum_sizes[t];
2180 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2182 return offsetof(struct btrfs_leaf, items);
2185 /* struct btrfs_file_extent_item */
2186 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2187 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2189 static inline unsigned long btrfs_file_extent_inline_start(struct
2190 btrfs_file_extent_item *e)
2192 unsigned long offset = (unsigned long)e;
2193 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2197 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2199 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2202 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2204 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2206 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2208 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2210 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2211 disk_num_bytes, 64);
2212 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2214 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2216 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2218 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2220 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2222 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2224 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2226 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2228 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2230 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2231 other_encoding, 16);
2233 /* btrfs_qgroup_status_item */
2234 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2236 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2238 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2240 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2243 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2244 struct btrfs_qgroup_status_item, version, 64);
2245 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2246 struct btrfs_qgroup_status_item, generation, 64);
2247 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2248 struct btrfs_qgroup_status_item, flags, 64);
2249 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2250 struct btrfs_qgroup_status_item, rescan, 64);
2252 /* btrfs_qgroup_info_item */
2253 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2255 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2257 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2258 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2259 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2261 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2262 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2264 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2265 struct btrfs_qgroup_info_item, generation, 64);
2266 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2267 struct btrfs_qgroup_info_item, referenced, 64);
2268 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2269 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2270 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2271 struct btrfs_qgroup_info_item, exclusive, 64);
2272 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2273 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2275 /* btrfs_qgroup_limit_item */
2276 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2278 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2279 max_referenced, 64);
2280 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2282 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2283 rsv_referenced, 64);
2284 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2287 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2288 struct btrfs_qgroup_limit_item, flags, 64);
2289 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2290 struct btrfs_qgroup_limit_item, max_referenced, 64);
2291 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2292 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2293 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2294 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2295 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2296 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2298 /* btrfs_balance_item */
2299 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
2301 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
2302 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2304 unsigned long offset = (unsigned long)bi;
2305 struct btrfs_balance_item *p;
2306 p = (struct btrfs_balance_item *)(eb->data + offset);
2310 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
2311 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2313 unsigned long offset = (unsigned long)bi;
2314 struct btrfs_balance_item *p;
2315 p = (struct btrfs_balance_item *)(eb->data + offset);
2319 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
2320 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2322 unsigned long offset = (unsigned long)bi;
2323 struct btrfs_balance_item *p;
2324 p = (struct btrfs_balance_item *)(eb->data + offset);
2329 * btrfs_dev_stats_item helper, returns pointer to the raw array, do the
2330 * endiannes conversion, @dsi is offset to eb data
2332 static inline __le64* btrfs_dev_stats_values(struct extent_buffer *eb,
2333 struct btrfs_dev_stats_item *dsi)
2335 unsigned long offset = (unsigned long)dsi;
2336 struct btrfs_dev_stats_item *p;
2337 p = (struct btrfs_dev_stats_item *)(eb->data + offset);
2342 * this returns the number of bytes used by the item on disk, minus the
2343 * size of any extent headers. If a file is compressed on disk, this is
2344 * the compressed size
2346 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2347 struct btrfs_item *e)
2349 unsigned long offset;
2350 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2351 return btrfs_item_size(eb, e) - offset;
2354 /* struct btrfs_ioctl_search_header */
2355 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2357 return get_unaligned_64(&sh->transid);
2360 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2362 return get_unaligned_64(&sh->objectid);
2365 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2367 return get_unaligned_64(&sh->offset);
2370 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2372 return get_unaligned_32(&sh->type);
2375 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2377 return get_unaligned_32(&sh->len);
2380 /* this returns the number of file bytes represented by the inline item.
2381 * If an item is compressed, this is the uncompressed size
2383 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2385 struct btrfs_file_extent_item *fi)
2388 * return the space used on disk if this item isn't
2389 * compressed or encoded
2391 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2392 btrfs_file_extent_encryption(eb, fi) == 0 &&
2393 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2394 return btrfs_file_extent_inline_item_len(eb,
2395 btrfs_item_nr(slot));
2398 /* otherwise use the ram bytes field */
2399 return btrfs_file_extent_ram_bytes(eb, fi);
2402 #define btrfs_fs_incompat(fs_info, opt) \
2403 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
2405 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2407 struct btrfs_super_block *disk_super;
2408 disk_super = fs_info->super_copy;
2409 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2412 #define btrfs_fs_compat_ro(fs_info, opt) \
2413 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
2415 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2417 struct btrfs_super_block *disk_super;
2418 disk_super = fs_info->super_copy;
2419 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2422 /* helper function to cast into the data area of the leaf. */
2423 #define btrfs_item_ptr(leaf, slot, type) \
2424 ((type *)(btrfs_leaf_data(leaf) + \
2425 btrfs_item_offset_nr(leaf, slot)))
2427 #define btrfs_item_ptr_offset(leaf, slot) \
2428 ((unsigned long)(btrfs_leaf_data(leaf) + \
2429 btrfs_item_offset_nr(leaf, slot)))
2432 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2433 struct btrfs_root *root,
2434 u64 num_bytes, u64 empty_size,
2435 u64 hint_byte, u64 search_end,
2436 struct btrfs_key *ins, int data);
2437 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2438 struct btrfs_root *root);
2439 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2440 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2441 u64 bytenr, u64 num_bytes);
2442 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2443 struct btrfs_root *root);
2444 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2445 btrfs_fs_info *info,
2447 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2448 btrfs_fs_info *info,
2450 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2451 struct btrfs_root *root,
2452 u32 blocksize, u64 root_objectid,
2453 struct btrfs_disk_key *key, int level,
2454 u64 hint, u64 empty_size);
2455 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2456 struct btrfs_root *root,
2457 u64 num_bytes, u64 parent,
2458 u64 root_objectid, u64 ref_generation,
2459 u64 owner, u64 empty_size, u64 hint_byte,
2460 u64 search_end, struct btrfs_key *ins, int data);
2461 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2462 struct btrfs_root *root, u64 bytenr,
2463 u64 offset, int metadata, u64 *refs, u64 *flags);
2464 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2465 struct btrfs_root *root,
2466 u64 bytenr, int level, u64 flags);
2467 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2468 struct extent_buffer *buf, int record_parent);
2469 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2470 struct extent_buffer *buf, int record_parent);
2471 int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2472 struct btrfs_root *root,
2473 struct extent_buffer *buf,
2474 u64 parent, int last_ref);
2475 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2476 struct btrfs_root *root,
2477 u64 bytenr, u64 num_bytes, u64 parent,
2478 u64 root_objectid, u64 owner, u64 offset);
2479 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2480 struct btrfs_root *root,
2481 struct extent_io_tree *unpin);
2482 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2483 struct btrfs_root *root,
2484 u64 bytenr, u64 num_bytes, u64 parent,
2485 u64 root_objectid, u64 ref_generation,
2486 u64 owner_objectid);
2487 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2488 struct btrfs_root *root, u64 bytenr,
2489 u64 orig_parent, u64 parent,
2490 u64 root_objectid, u64 ref_generation,
2491 u64 owner_objectid);
2492 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2493 struct btrfs_root *root);
2494 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2495 int btrfs_read_block_groups(struct btrfs_root *root);
2496 struct btrfs_block_group_cache *
2497 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2498 u64 chunk_objectid, u64 chunk_offset, u64 size);
2499 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2500 struct btrfs_fs_info *fs_info, u64 bytes_used,
2501 u64 type, u64 chunk_objectid, u64 chunk_offset,
2503 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2504 struct btrfs_fs_info *fs_info);
2505 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2506 struct btrfs_root *root, u64 bytenr, u64 num,
2507 int alloc, int mark_free);
2508 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2509 struct btrfs_root *root, u64 objectid,
2510 struct btrfs_inode_item *inode,
2511 u64 file_pos, u64 disk_bytenr,
2513 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2514 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2515 void free_excluded_extents(struct btrfs_root *root,
2516 struct btrfs_block_group_cache *cache);
2517 int exclude_super_stripes(struct btrfs_root *root,
2518 struct btrfs_block_group_cache *cache);
2519 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2520 struct btrfs_fs_info *info, u64 start, u64 end);
2521 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2524 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2525 int btrfs_del_ptr(struct btrfs_root *root, struct btrfs_path *path,
2526 int level, int slot);
2527 enum btrfs_tree_block_status
2528 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2529 struct extent_buffer *buf);
2530 enum btrfs_tree_block_status
2531 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2532 struct extent_buffer *buf);
2533 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2534 int level, int slot, u64 objectid);
2535 struct extent_buffer *read_node_slot(struct btrfs_fs_info *fs_info,
2536 struct extent_buffer *parent, int slot);
2537 int btrfs_previous_item(struct btrfs_root *root,
2538 struct btrfs_path *path, u64 min_objectid,
2540 int btrfs_previous_extent_item(struct btrfs_root *root,
2541 struct btrfs_path *path, u64 min_objectid);
2542 int btrfs_next_extent_item(struct btrfs_root *root,
2543 struct btrfs_path *path, u64 max_objectid);
2544 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2545 struct btrfs_root *root, struct extent_buffer *buf,
2546 struct extent_buffer *parent, int parent_slot,
2547 struct extent_buffer **cow_ret);
2548 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2549 struct btrfs_root *root,
2550 struct extent_buffer *buf,
2551 struct extent_buffer *parent, int parent_slot,
2552 struct extent_buffer **cow_ret,
2553 u64 search_start, u64 empty_size);
2554 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2555 struct btrfs_root *root,
2556 struct extent_buffer *buf,
2557 struct extent_buffer **cow_ret, u64 new_root_objectid);
2558 int btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
2560 int btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
2561 u32 new_size, int from_end);
2562 int btrfs_split_item(struct btrfs_trans_handle *trans,
2563 struct btrfs_root *root,
2564 struct btrfs_path *path,
2565 struct btrfs_key *new_key,
2566 unsigned long split_offset);
2567 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2568 *root, struct btrfs_key *key, struct btrfs_path *p, int
2570 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2571 u64 iobjectid, u64 ioff, u8 key_type,
2572 struct btrfs_key *found_key);
2573 void btrfs_release_path(struct btrfs_path *p);
2574 void add_root_to_dirty_list(struct btrfs_root *root);
2575 struct btrfs_path *btrfs_alloc_path(void);
2576 void btrfs_free_path(struct btrfs_path *p);
2577 void btrfs_init_path(struct btrfs_path *p);
2578 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2579 struct btrfs_path *path, int slot, int nr);
2581 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2582 struct btrfs_root *root,
2583 struct btrfs_path *path)
2585 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2588 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2589 *root, struct btrfs_key *key, void *data, u32 data_size);
2590 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2591 struct btrfs_root *root,
2592 struct btrfs_path *path,
2593 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2595 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2596 struct btrfs_root *root,
2597 struct btrfs_path *path,
2598 struct btrfs_key *key,
2601 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2604 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2605 static inline int btrfs_next_item(struct btrfs_root *root,
2606 struct btrfs_path *p)
2609 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2610 return btrfs_next_leaf(root, p);
2614 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2615 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2616 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2617 struct btrfs_disk_key *key, int level);
2618 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2619 struct btrfs_key *new_key);
2620 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2621 struct btrfs_path *path,
2622 struct btrfs_key *new_key);
2625 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2626 struct btrfs_root *tree_root,
2627 u64 root_id, u8 type, u64 ref_id,
2628 u64 dirid, u64 sequence,
2629 const char *name, int name_len);
2630 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2631 *root, struct btrfs_key *key, struct btrfs_root_item
2633 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2634 struct btrfs_key *key);
2635 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2636 *root, struct btrfs_key *key, struct btrfs_root_item
2638 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2639 btrfs_root_item *item, struct btrfs_key *key);
2641 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2642 *root, const char *name, int name_len, u64 dir,
2643 struct btrfs_key *location, u8 type, u64 index);
2644 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2645 struct btrfs_root *root,
2646 struct btrfs_path *path, u64 dir,
2647 const char *name, int name_len,
2649 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2650 struct btrfs_root *root,
2651 struct btrfs_path *path, u64 dir,
2652 const char *name, int name_len,
2653 u64 index, int mod);
2654 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2655 struct btrfs_root *root,
2656 struct btrfs_path *path,
2657 struct btrfs_dir_item *di);
2658 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2659 struct btrfs_root *root, const char *name,
2660 u16 name_len, const void *data, u16 data_len,
2663 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2664 struct btrfs_root *fs_root,
2665 u64 dirid, u64 *objectid);
2668 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2669 struct btrfs_root *root,
2670 const char *name, int name_len,
2671 u64 inode_objectid, u64 ref_objectid, u64 index);
2672 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2673 *root, u64 objectid, struct btrfs_inode_item
2675 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2676 *root, struct btrfs_path *path,
2677 struct btrfs_key *location, int mod);
2678 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2679 *trans, struct btrfs_path *path, struct btrfs_root *root,
2680 u64 ino, u64 parent_ino, u64 index, const char *name,
2681 int namelen, int ins_len);
2682 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2683 struct btrfs_root *root,
2684 const char *name, int name_len,
2685 u64 inode_objectid, u64 ref_objectid,
2687 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2688 struct btrfs_root *root,
2689 const char *name, int name_len,
2690 u64 inode_objectid, u64 ref_objectid, u64 index);
2691 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2692 struct btrfs_root *root, struct btrfs_path *path,
2693 const char *name, int namelen, u64 ino, u64 parent_ino,
2695 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2696 struct btrfs_root *root, const char *name, int name_len,
2697 u64 ino, u64 parent_ino, u64 *index);
2700 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2701 struct btrfs_root *root, u64 bytenr, u64 len);
2702 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2703 struct btrfs_root *root,
2704 u64 objectid, u64 pos, u64 offset,
2707 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2708 struct btrfs_root *root, u64 objectid,
2709 u64 offset, const char *buffer, size_t size);
2710 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2711 struct btrfs_root *root, u64 alloc_end,
2712 u64 bytenr, char *data, size_t len);
2713 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2714 struct btrfs_root *root, struct btrfs_path *path,
2718 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2719 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2722 static inline int is_fstree(u64 rootid)
2724 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2725 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2731 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2732 u64 dir, u64 index);
2733 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2735 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2736 struct btrfs_root *root, u64 ino, u64 flags);
2737 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2738 u64 ino, u64 parent_ino, char *name, int namelen,
2739 u8 type, u64 *index, int add_backref);
2740 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2741 u64 ino, u64 parent_ino, u64 index, const char *name,
2742 int namelen, int add_orphan);
2743 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2744 struct btrfs_root *root, struct btrfs_path *path,
2746 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2747 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2750 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2751 struct btrfs_root *root,
2752 struct btrfs_path *path,
2753 u64 ino, u64 offset, u64 len, int ins_len);
2754 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2755 struct btrfs_root *root,
2756 u64 ino, u64 offset, u64 len);
2757 int btrfs_read_file(struct btrfs_root *root, u64 ino, u64 start, int len,