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
142 * the max metadata block size. This limit is somewhat artificial,
143 * but the memmove costs go through the roof for larger blocks.
145 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
148 * we can actually store much bigger names, but lets not confuse the rest
151 #define BTRFS_NAME_LEN 255
154 * Theoretical limit is larger, but we keep this down to a sane
155 * value. That should limit greatly the possibility of collisions on
158 #define BTRFS_LINK_MAX 65535U
160 /* 32 bytes in various csum fields */
161 #define BTRFS_CSUM_SIZE 32
164 #define BTRFS_CSUM_TYPE_CRC32 0
166 static int btrfs_csum_sizes[] = { 4 };
168 /* four bytes for CRC32 */
169 #define BTRFS_CRC32_SIZE 4
170 #define BTRFS_EMPTY_DIR_SIZE 0
172 #define BTRFS_FT_UNKNOWN 0
173 #define BTRFS_FT_REG_FILE 1
174 #define BTRFS_FT_DIR 2
175 #define BTRFS_FT_CHRDEV 3
176 #define BTRFS_FT_BLKDEV 4
177 #define BTRFS_FT_FIFO 5
178 #define BTRFS_FT_SOCK 6
179 #define BTRFS_FT_SYMLINK 7
180 #define BTRFS_FT_XATTR 8
181 #define BTRFS_FT_MAX 9
183 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
186 * the key defines the order in the tree, and so it also defines (optimal)
187 * block layout. objectid corresponds to the inode number. The flags
188 * tells us things about the object, and is a kind of stream selector.
189 * so for a given inode, keys with flags of 1 might refer to the inode
190 * data, flags of 2 may point to file data in the btree and flags == 3
191 * may point to extents.
193 * offset is the starting byte offset for this key in the stream.
195 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
196 * in cpu native order. Otherwise they are identical and their sizes
197 * should be the same (ie both packed)
199 struct btrfs_disk_key {
203 } __attribute__ ((__packed__));
209 } __attribute__ ((__packed__));
211 struct btrfs_mapping_tree {
212 struct cache_tree cache_tree;
215 #define BTRFS_UUID_SIZE 16
216 struct btrfs_dev_item {
217 /* the internal btrfs device id */
220 /* size of the device */
226 /* optimal io alignment for this device */
229 /* optimal io width for this device */
232 /* minimal io size for this device */
235 /* type and info about this device */
238 /* expected generation for this device */
242 * starting byte of this partition on the device,
243 * to allow for stripe alignment in the future
247 /* grouping information for allocation decisions */
250 /* seek speed 0-100 where 100 is fastest */
253 /* bandwidth 0-100 where 100 is fastest */
256 /* btrfs generated uuid for this device */
257 u8 uuid[BTRFS_UUID_SIZE];
259 /* uuid of FS who owns this device */
260 u8 fsid[BTRFS_UUID_SIZE];
261 } __attribute__ ((__packed__));
263 struct btrfs_stripe {
266 u8 dev_uuid[BTRFS_UUID_SIZE];
267 } __attribute__ ((__packed__));
270 /* size of this chunk in bytes */
273 /* objectid of the root referencing this chunk */
279 /* optimal io alignment for this chunk */
282 /* optimal io width for this chunk */
285 /* minimal io size for this chunk */
288 /* 2^16 stripes is quite a lot, a second limit is the size of a single
293 /* sub stripes only matter for raid10 */
295 struct btrfs_stripe stripe;
296 /* additional stripes go here */
297 } __attribute__ ((__packed__));
299 #define BTRFS_FREE_SPACE_EXTENT 1
300 #define BTRFS_FREE_SPACE_BITMAP 2
302 struct btrfs_free_space_entry {
306 } __attribute__ ((__packed__));
308 struct btrfs_free_space_header {
309 struct btrfs_disk_key location;
313 } __attribute__ ((__packed__));
315 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
317 BUG_ON(num_stripes == 0);
318 return sizeof(struct btrfs_chunk) +
319 sizeof(struct btrfs_stripe) * (num_stripes - 1);
322 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
323 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
324 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
325 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
326 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
327 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
329 #define BTRFS_BACKREF_REV_MAX 256
330 #define BTRFS_BACKREF_REV_SHIFT 56
331 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
332 BTRFS_BACKREF_REV_SHIFT)
334 #define BTRFS_OLD_BACKREF_REV 0
335 #define BTRFS_MIXED_BACKREF_REV 1
338 * every tree block (leaf or node) starts with this header.
340 struct btrfs_header {
341 /* these first four must match the super block */
342 u8 csum[BTRFS_CSUM_SIZE];
343 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
344 __le64 bytenr; /* which block this node is supposed to live in */
347 /* allowed to be different from the super from here on down */
348 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
353 } __attribute__ ((__packed__));
355 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->fs_info->nodesize - \
356 sizeof(struct btrfs_header)) / \
357 sizeof(struct btrfs_key_ptr))
358 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
359 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->fs_info->nodesize))
360 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
361 sizeof(struct btrfs_item) - \
362 sizeof(struct btrfs_file_extent_item))
363 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
364 sizeof(struct btrfs_item) -\
365 sizeof(struct btrfs_dir_item))
369 * this is a very generous portion of the super block, giving us
370 * room to translate 14 chunks with 3 stripes each.
372 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
373 #define BTRFS_LABEL_SIZE 256
376 * just in case we somehow lose the roots and are not able to mount,
377 * we store an array of the roots from previous transactions
380 #define BTRFS_NUM_BACKUP_ROOTS 4
381 struct btrfs_root_backup {
383 __le64 tree_root_gen;
386 __le64 chunk_root_gen;
389 __le64 extent_root_gen;
398 __le64 csum_root_gen;
408 u8 extent_root_level;
412 /* future and to align */
414 } __attribute__ ((__packed__));
417 * the super block basically lists the main trees of the FS
418 * it currently lacks any block count etc etc
420 struct btrfs_super_block {
421 u8 csum[BTRFS_CSUM_SIZE];
422 /* the first 3 fields must match struct btrfs_header */
423 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
424 __le64 bytenr; /* this block number */
427 /* allowed to be different from the btrfs_header from here own down */
434 /* this will help find the new super based on the log root */
435 __le64 log_root_transid;
438 __le64 root_dir_objectid;
442 /* Unused and must be equal to nodesize */
443 __le32 __unused_leafsize;
445 __le32 sys_chunk_array_size;
446 __le64 chunk_root_generation;
448 __le64 compat_ro_flags;
449 __le64 incompat_flags;
454 struct btrfs_dev_item dev_item;
456 char label[BTRFS_LABEL_SIZE];
458 __le64 cache_generation;
459 __le64 uuid_tree_generation;
461 /* future expansion */
463 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
464 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
465 } __attribute__ ((__packed__));
468 * Compat flags that we support. If any incompat flags are set other than the
469 * ones specified below then we will fail to mount
471 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
473 * Older kernels on big-endian systems produced broken free space tree bitmaps,
474 * and btrfs-progs also used to corrupt the free space tree. If this bit is
475 * clear, then the free space tree cannot be trusted. btrfs-progs can also
476 * intentionally clear this bit to ask the kernel to rebuild the free space
479 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
481 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
482 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
483 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
484 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
487 * some patches floated around with a second compression method
488 * lets save that incompat here for when they do get in
489 * Note we don't actually support it, we're just reserving the
492 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
495 * older kernels tried to do bigger metadata blocks, but the
496 * code was pretty buggy. Lets not let them try anymore.
498 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
499 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
500 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
501 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
502 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
504 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
507 * The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be
508 * added here until read-write support for the free space tree is implemented in
511 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
513 #define BTRFS_FEATURE_INCOMPAT_SUPP \
514 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
515 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
516 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
517 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
518 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
519 BTRFS_FEATURE_INCOMPAT_RAID56 | \
520 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
521 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
522 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
525 * A leaf is full of items. offset and size tell us where to find
526 * the item in the leaf (relative to the start of the data area)
529 struct btrfs_disk_key key;
532 } __attribute__ ((__packed__));
535 * leaves have an item area and a data area:
536 * [item0, item1....itemN] [free space] [dataN...data1, data0]
538 * The data is separate from the items to get the keys closer together
542 struct btrfs_header header;
543 struct btrfs_item items[];
544 } __attribute__ ((__packed__));
547 * all non-leaf blocks are nodes, they hold only keys and pointers to
550 struct btrfs_key_ptr {
551 struct btrfs_disk_key key;
554 } __attribute__ ((__packed__));
557 struct btrfs_header header;
558 struct btrfs_key_ptr ptrs[];
559 } __attribute__ ((__packed__));
562 * btrfs_paths remember the path taken from the root down to the leaf.
563 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
564 * to any other levels that are present.
566 * The slots array records the index of the item or block pointer
567 * used while walking the tree.
571 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
572 int slots[BTRFS_MAX_LEVEL];
574 /* The kernel locking sheme is not done in userspace. */
575 int locks[BTRFS_MAX_LEVEL];
578 /* keep some upper locks as we walk down */
582 * set by btrfs_split_item, tells search_slot to keep all locks
583 * and to force calls to keep space in the nodes
590 * items in the extent btree are used to record the objectid of the
591 * owner of the block and the number of references
594 struct btrfs_extent_item {
598 } __attribute__ ((__packed__));
600 struct btrfs_extent_item_v0 {
602 } __attribute__ ((__packed__));
604 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
605 sizeof(struct btrfs_item))
606 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
608 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
609 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
611 /* following flags only apply to tree blocks */
613 /* use full backrefs for extent pointers in the block*/
614 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
616 struct btrfs_tree_block_info {
617 struct btrfs_disk_key key;
619 } __attribute__ ((__packed__));
621 struct btrfs_extent_data_ref {
626 } __attribute__ ((__packed__));
628 struct btrfs_shared_data_ref {
630 } __attribute__ ((__packed__));
632 struct btrfs_extent_inline_ref {
635 } __attribute__ ((__packed__));
637 struct btrfs_extent_ref_v0 {
642 } __attribute__ ((__packed__));
644 /* dev extents record free space on individual devices. The owner
645 * field points back to the chunk allocation mapping tree that allocated
646 * the extent. The chunk tree uuid field is a way to double check the owner
648 struct btrfs_dev_extent {
650 __le64 chunk_objectid;
653 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
654 } __attribute__ ((__packed__));
656 struct btrfs_inode_ref {
660 } __attribute__ ((__packed__));
662 struct btrfs_inode_extref {
663 __le64 parent_objectid;
666 __u8 name[0]; /* name goes here */
667 } __attribute__ ((__packed__));
669 struct btrfs_timespec {
672 } __attribute__ ((__packed__));
675 BTRFS_COMPRESS_NONE = 0,
676 BTRFS_COMPRESS_ZLIB = 1,
677 BTRFS_COMPRESS_LZO = 2,
678 BTRFS_COMPRESS_TYPES = 2,
679 BTRFS_COMPRESS_LAST = 3,
680 } btrfs_compression_type;
682 /* we don't understand any encryption methods right now */
684 BTRFS_ENCRYPTION_NONE = 0,
685 BTRFS_ENCRYPTION_LAST = 1,
686 } btrfs_encryption_type;
688 enum btrfs_tree_block_status {
689 BTRFS_TREE_BLOCK_CLEAN,
690 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
691 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
692 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
693 BTRFS_TREE_BLOCK_INVALID_LEVEL,
694 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
695 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
698 struct btrfs_inode_item {
699 /* nfs style generation number */
701 /* transid that last touched this inode */
713 /* modification sequence number for NFS */
717 * a little future expansion, for more than this we can
718 * just grow the inode item and version it
721 struct btrfs_timespec atime;
722 struct btrfs_timespec ctime;
723 struct btrfs_timespec mtime;
724 struct btrfs_timespec otime;
725 } __attribute__ ((__packed__));
727 struct btrfs_dir_log_item {
729 } __attribute__ ((__packed__));
731 struct btrfs_dir_item {
732 struct btrfs_disk_key location;
737 } __attribute__ ((__packed__));
739 struct btrfs_root_item_v0 {
740 struct btrfs_inode_item inode;
746 __le64 last_snapshot;
749 struct btrfs_disk_key drop_progress;
752 } __attribute__ ((__packed__));
754 struct btrfs_root_item {
755 struct btrfs_inode_item inode;
761 __le64 last_snapshot;
764 struct btrfs_disk_key drop_progress;
769 * The following fields appear after subvol_uuids+subvol_times
774 * This generation number is used to test if the new fields are valid
775 * and up to date while reading the root item. Every time the root item
776 * is written out, the "generation" field is copied into this field. If
777 * anyone ever mounted the fs with an older kernel, we will have
778 * mismatching generation values here and thus must invalidate the
779 * new fields. See btrfs_update_root and btrfs_find_last_root for
781 * the offset of generation_v2 is also used as the start for the memset
782 * when invalidating the fields.
784 __le64 generation_v2;
785 u8 uuid[BTRFS_UUID_SIZE];
786 u8 parent_uuid[BTRFS_UUID_SIZE];
787 u8 received_uuid[BTRFS_UUID_SIZE];
788 __le64 ctransid; /* updated when an inode changes */
789 __le64 otransid; /* trans when created */
790 __le64 stransid; /* trans when sent. non-zero for received subvol */
791 __le64 rtransid; /* trans when received. non-zero for received subvol */
792 struct btrfs_timespec ctime;
793 struct btrfs_timespec otime;
794 struct btrfs_timespec stime;
795 struct btrfs_timespec rtime;
796 __le64 reserved[8]; /* for future */
797 } __attribute__ ((__packed__));
800 * this is used for both forward and backward root refs
802 struct btrfs_root_ref {
806 } __attribute__ ((__packed__));
808 struct btrfs_disk_balance_args {
810 * profiles to operate on, single is denoted by
811 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
817 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
818 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
831 /* devid subset filter [pstart..pend) */
835 /* btrfs virtual address space subset filter [vstart..vend) */
840 * profile to convert to, single is denoted by
841 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
845 /* BTRFS_BALANCE_ARGS_* */
849 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
850 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
862 * Process chunks that cross stripes_min..stripes_max devices,
863 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
869 } __attribute__ ((__packed__));
872 * store balance parameters to disk so that balance can be properly
873 * resumed after crash or unmount
875 struct btrfs_balance_item {
876 /* BTRFS_BALANCE_* */
879 struct btrfs_disk_balance_args data;
880 struct btrfs_disk_balance_args meta;
881 struct btrfs_disk_balance_args sys;
884 } __attribute__ ((__packed__));
886 #define BTRFS_FILE_EXTENT_INLINE 0
887 #define BTRFS_FILE_EXTENT_REG 1
888 #define BTRFS_FILE_EXTENT_PREALLOC 2
890 struct btrfs_file_extent_item {
892 * transaction id that created this extent
896 * max number of bytes to hold this extent in ram
897 * when we split a compressed extent we can't know how big
898 * each of the resulting pieces will be. So, this is
899 * an upper limit on the size of the extent in ram instead of
905 * 32 bits for the various ways we might encode the data,
906 * including compression and encryption. If any of these
907 * are set to something a given disk format doesn't understand
908 * it is treated like an incompat flag for reading and writing,
913 __le16 other_encoding; /* spare for later use */
915 /* are we inline data or a real extent? */
919 * disk space consumed by the extent, checksum blocks are included
923 __le64 disk_num_bytes;
925 * the logical offset in file blocks (no csums)
926 * this extent record is for. This allows a file extent to point
927 * into the middle of an existing extent on disk, sharing it
928 * between two snapshots (useful if some bytes in the middle of the
929 * extent have changed
933 * the logical number of file blocks (no csums included)
937 } __attribute__ ((__packed__));
939 struct btrfs_dev_stats_item {
941 * grow this item struct at the end for future enhancements and keep
942 * the existing values unchanged
944 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
945 } __attribute__ ((__packed__));
947 struct btrfs_csum_item {
949 } __attribute__ ((__packed__));
952 * We don't want to overwrite 1M at the beginning of device, even though
953 * there is our 1st superblock at 64k. Some possible reasons:
954 * - the first 64k blank is useful for some boot loader/manager
955 * - the first 1M could be scratched by buggy partitioner or somesuch
957 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)SZ_1M)
959 /* tag for the radix tree of block groups in ram */
960 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
961 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
962 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
963 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
964 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
965 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
966 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
967 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
968 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
969 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
970 #define BTRFS_NR_RAID_TYPES 7
972 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
973 BTRFS_BLOCK_GROUP_SYSTEM | \
974 BTRFS_BLOCK_GROUP_METADATA)
976 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
977 BTRFS_BLOCK_GROUP_RAID1 | \
978 BTRFS_BLOCK_GROUP_RAID5 | \
979 BTRFS_BLOCK_GROUP_RAID6 | \
980 BTRFS_BLOCK_GROUP_DUP | \
981 BTRFS_BLOCK_GROUP_RAID10)
983 /* used in struct btrfs_balance_args fields */
984 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
987 * GLOBAL_RSV does not exist as a on-disk block group type and is used
988 * internally for exporting info about global block reserve from space infos
990 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
992 #define BTRFS_QGROUP_LEVEL_SHIFT 48
994 static inline u64 btrfs_qgroup_level(u64 qgroupid)
996 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
999 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
1001 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
1004 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1005 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1006 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1008 struct btrfs_qgroup_status_item {
1012 __le64 rescan; /* progress during scanning */
1013 } __attribute__ ((__packed__));
1015 struct btrfs_block_group_item {
1017 __le64 chunk_objectid;
1019 } __attribute__ ((__packed__));
1021 struct btrfs_free_space_info {
1022 __le32 extent_count;
1024 } __attribute__ ((__packed__));
1026 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1028 struct btrfs_qgroup_info_item {
1031 __le64 referenced_compressed;
1033 __le64 exclusive_compressed;
1034 } __attribute__ ((__packed__));
1036 /* flags definition for qgroup limits */
1037 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1038 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1039 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1040 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1041 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1042 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1044 struct btrfs_qgroup_limit_item {
1046 __le64 max_referenced;
1047 __le64 max_exclusive;
1048 __le64 rsv_referenced;
1049 __le64 rsv_exclusive;
1050 } __attribute__ ((__packed__));
1052 struct btrfs_space_info {
1058 struct list_head list;
1061 struct btrfs_block_group_cache {
1062 struct cache_extent cache;
1063 struct btrfs_key key;
1064 struct btrfs_block_group_item item;
1065 struct btrfs_space_info *space_info;
1066 struct btrfs_free_space_ctl *free_space_ctl;
1074 struct btrfs_device;
1075 struct btrfs_fs_devices;
1076 struct btrfs_fs_info {
1077 u8 fsid[BTRFS_FSID_SIZE];
1079 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1080 u8 *new_chunk_tree_uuid;
1081 struct btrfs_root *fs_root;
1082 struct btrfs_root *extent_root;
1083 struct btrfs_root *tree_root;
1084 struct btrfs_root *chunk_root;
1085 struct btrfs_root *dev_root;
1086 struct btrfs_root *csum_root;
1087 struct btrfs_root *quota_root;
1088 struct btrfs_root *free_space_root;
1090 struct rb_root fs_root_tree;
1092 /* the log root tree is a directory of all the other log roots */
1093 struct btrfs_root *log_root_tree;
1095 struct extent_io_tree extent_cache;
1096 struct extent_io_tree free_space_cache;
1097 struct extent_io_tree block_group_cache;
1098 struct extent_io_tree pinned_extents;
1099 struct extent_io_tree pending_del;
1100 struct extent_io_tree extent_ins;
1101 struct extent_io_tree *excluded_extents;
1103 /* logical->physical extent mapping */
1104 struct btrfs_mapping_tree mapping_tree;
1107 u64 last_trans_committed;
1109 u64 avail_data_alloc_bits;
1110 u64 avail_metadata_alloc_bits;
1111 u64 avail_system_alloc_bits;
1112 u64 data_alloc_profile;
1113 u64 metadata_alloc_profile;
1114 u64 system_alloc_profile;
1117 struct btrfs_trans_handle *running_transaction;
1118 struct btrfs_super_block *super_copy;
1119 struct mutex fs_mutex;
1124 struct list_head dirty_cowonly_roots;
1125 struct list_head recow_ebs;
1127 struct btrfs_fs_devices *fs_devices;
1128 struct list_head space_info;
1131 unsigned int readonly:1;
1132 unsigned int on_restoring:1;
1133 unsigned int is_chunk_recover:1;
1134 unsigned int quota_enabled:1;
1135 unsigned int suppress_check_block_errors:1;
1136 unsigned int ignore_fsid_mismatch:1;
1137 unsigned int ignore_chunk_tree_error:1;
1138 unsigned int avoid_meta_chunk_alloc:1;
1139 unsigned int avoid_sys_chunk_alloc:1;
1140 unsigned int finalize_on_close:1;
1142 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1143 struct btrfs_root *root,
1144 u64 bytenr, u64 num_bytes, u64 parent,
1145 u64 root_objectid, u64 owner, u64 offset,
1147 struct cache_tree *fsck_extent_cache;
1148 struct cache_tree *corrupt_blocks;
1150 /* Cached block sizes */
1157 * in ram representation of the tree. extent_root is used for all allocations
1158 * and for the extent tree extent_root root.
1161 struct extent_buffer *node;
1162 struct extent_buffer *commit_root;
1163 struct btrfs_root_item root_item;
1164 struct btrfs_key root_key;
1165 struct btrfs_fs_info *fs_info;
1169 /* data allocations are done in sectorsize units */
1172 /* node allocations are done in nodesize units */
1175 /* leaf allocations are done in nodesize units */
1183 u64 last_inode_alloc;
1186 * Record orphan data extent ref
1188 * TODO: Don't restore things in btrfs_root.
1189 * Directly record it into inode_record, which needs a lot of
1190 * infrastructure change to allow cooperation between extent
1193 struct list_head orphan_data_extents;
1195 /* the dirty list is only used by non-reference counted roots */
1196 struct list_head dirty_list;
1197 struct rb_node rb_node;
1201 * inode items have the data typically returned from stat and store other
1202 * info about object characteristics. There is one for every file and dir in
1205 #define BTRFS_INODE_ITEM_KEY 1
1206 #define BTRFS_INODE_REF_KEY 12
1207 #define BTRFS_INODE_EXTREF_KEY 13
1208 #define BTRFS_XATTR_ITEM_KEY 24
1209 #define BTRFS_ORPHAN_ITEM_KEY 48
1211 #define BTRFS_DIR_LOG_ITEM_KEY 60
1212 #define BTRFS_DIR_LOG_INDEX_KEY 72
1214 * dir items are the name -> inode pointers in a directory. There is one
1215 * for every name in a directory.
1217 #define BTRFS_DIR_ITEM_KEY 84
1218 #define BTRFS_DIR_INDEX_KEY 96
1221 * extent data is for file data
1223 #define BTRFS_EXTENT_DATA_KEY 108
1226 * csum items have the checksums for data in the extents
1228 #define BTRFS_CSUM_ITEM_KEY 120
1230 * extent csums are stored in a separate tree and hold csums for
1231 * an entire extent on disk.
1233 #define BTRFS_EXTENT_CSUM_KEY 128
1236 * root items point to tree roots. There are typically in the root
1237 * tree used by the super block to find all the other trees
1239 #define BTRFS_ROOT_ITEM_KEY 132
1242 * root backrefs tie subvols and snapshots to the directory entries that
1245 #define BTRFS_ROOT_BACKREF_KEY 144
1248 * root refs make a fast index for listing all of the snapshots and
1249 * subvolumes referenced by a given root. They point directly to the
1250 * directory item in the root that references the subvol
1252 #define BTRFS_ROOT_REF_KEY 156
1255 * extent items are in the extent map tree. These record which blocks
1256 * are used, and how many references there are to each block
1258 #define BTRFS_EXTENT_ITEM_KEY 168
1261 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1262 * the length, so we save the level in key->offset instead of the length.
1264 #define BTRFS_METADATA_ITEM_KEY 169
1266 #define BTRFS_TREE_BLOCK_REF_KEY 176
1268 #define BTRFS_EXTENT_DATA_REF_KEY 178
1270 /* old style extent backrefs */
1271 #define BTRFS_EXTENT_REF_V0_KEY 180
1273 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1275 #define BTRFS_SHARED_DATA_REF_KEY 184
1279 * block groups give us hints into the extent allocation trees. Which
1280 * blocks are free etc etc
1282 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1285 * Every block group is represented in the free space tree by a free space info
1286 * item, which stores some accounting information. It is keyed on
1287 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1289 #define BTRFS_FREE_SPACE_INFO_KEY 198
1292 * A free space extent tracks an extent of space that is free in a block group.
1293 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1295 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1298 * When a block group becomes very fragmented, we convert it to use bitmaps
1299 * instead of extents. A free space bitmap is keyed on
1300 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1301 * (length / sectorsize) bits.
1303 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1305 #define BTRFS_DEV_EXTENT_KEY 204
1306 #define BTRFS_DEV_ITEM_KEY 216
1307 #define BTRFS_CHUNK_ITEM_KEY 228
1309 #define BTRFS_BALANCE_ITEM_KEY 248
1314 #define BTRFS_QGROUP_STATUS_KEY 240
1315 #define BTRFS_QGROUP_INFO_KEY 242
1316 #define BTRFS_QGROUP_LIMIT_KEY 244
1317 #define BTRFS_QGROUP_RELATION_KEY 246
1320 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1322 #define BTRFS_BALANCE_ITEM_KEY 248
1325 * The key type for tree items that are stored persistently, but do not need to
1326 * exist for extended period of time. The items can exist in any tree.
1328 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1332 * - balance status item
1333 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1335 #define BTRFS_TEMPORARY_ITEM_KEY 248
1338 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1340 #define BTRFS_DEV_STATS_KEY 249
1343 * The key type for tree items that are stored persistently and usually exist
1344 * for a long period, eg. filesystem lifetime. The item kinds can be status
1345 * information, stats or preference values. The item can exist in any tree.
1347 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1351 * - device statistics, store IO stats in the device tree, one key for all
1353 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1355 #define BTRFS_PERSISTENT_ITEM_KEY 249
1358 * Persistently stores the device replace state in the device tree.
1359 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1361 #define BTRFS_DEV_REPLACE_KEY 250
1364 * Stores items that allow to quickly map UUIDs to something else.
1365 * These items are part of the filesystem UUID tree.
1366 * The key is built like this:
1367 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1369 #if BTRFS_UUID_SIZE != 16
1370 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1372 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1373 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1374 * received subvols */
1377 * string items are for debugging. They just store a short string of
1380 #define BTRFS_STRING_ITEM_KEY 253
1384 #define BTRFS_INODE_NODATASUM (1 << 0)
1385 #define BTRFS_INODE_NODATACOW (1 << 1)
1386 #define BTRFS_INODE_READONLY (1 << 2)
1387 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1388 #define BTRFS_INODE_PREALLOC (1 << 4)
1389 #define BTRFS_INODE_SYNC (1 << 5)
1390 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1391 #define BTRFS_INODE_APPEND (1 << 7)
1392 #define BTRFS_INODE_NODUMP (1 << 8)
1393 #define BTRFS_INODE_NOATIME (1 << 9)
1394 #define BTRFS_INODE_DIRSYNC (1 << 10)
1395 #define BTRFS_INODE_COMPRESS (1 << 11)
1397 #define read_eb_member(eb, ptr, type, member, result) ( \
1398 read_extent_buffer(eb, (char *)(result), \
1399 ((unsigned long)(ptr)) + \
1400 offsetof(type, member), \
1401 sizeof(((type *)0)->member)))
1403 #define write_eb_member(eb, ptr, type, member, result) ( \
1404 write_extent_buffer(eb, (char *)(result), \
1405 ((unsigned long)(ptr)) + \
1406 offsetof(type, member), \
1407 sizeof(((type *)0)->member)))
1409 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1410 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1412 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1413 return le##bits##_to_cpu(h->member); \
1415 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1418 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1419 h->member = cpu_to_le##bits(val); \
1422 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1423 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1426 unsigned long offset = (unsigned long)s; \
1427 const type *p = (type *) (eb->data + offset); \
1428 return get_unaligned_le##bits(&p->member); \
1430 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1431 type *s, u##bits val) \
1433 unsigned long offset = (unsigned long)s; \
1434 type *p = (type *) (eb->data + offset); \
1435 put_unaligned_le##bits(val, &p->member); \
1438 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1439 static inline u##bits btrfs_##name(const type *s) \
1441 return le##bits##_to_cpu(s->member); \
1443 static inline void btrfs_set_##name(type *s, u##bits val) \
1445 s->member = cpu_to_le##bits(val); \
1448 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1449 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1450 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1451 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1452 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1453 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1455 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1456 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1457 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1458 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1459 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1460 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1462 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1463 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1465 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1467 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1469 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1471 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1473 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1474 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1476 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1478 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1480 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1483 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1485 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1488 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1490 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1493 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1494 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1495 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1496 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1497 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1498 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1499 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1500 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1501 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1502 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1503 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1505 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1507 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1510 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1511 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1512 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1514 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1516 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1518 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1520 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1521 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1523 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1525 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1526 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1528 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1531 unsigned long offset = (unsigned long)c;
1532 offset += offsetof(struct btrfs_chunk, stripe);
1533 offset += nr * sizeof(struct btrfs_stripe);
1534 return (struct btrfs_stripe *)offset;
1537 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1539 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1542 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1543 struct btrfs_chunk *c, int nr)
1545 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1548 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1549 struct btrfs_chunk *c, int nr,
1552 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1555 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1556 struct btrfs_chunk *c, int nr)
1558 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1561 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1562 struct btrfs_chunk *c, int nr,
1565 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1568 /* struct btrfs_block_group_item */
1569 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1571 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1573 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1574 struct btrfs_block_group_item, chunk_objectid, 64);
1576 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1577 struct btrfs_block_group_item, chunk_objectid, 64);
1578 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1579 struct btrfs_block_group_item, flags, 64);
1580 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1581 struct btrfs_block_group_item, flags, 64);
1583 /* struct btrfs_free_space_info */
1584 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1586 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1588 /* struct btrfs_inode_ref */
1589 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1590 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1591 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1593 /* struct btrfs_inode_extref */
1594 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1595 parent_objectid, 64);
1596 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1598 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1600 /* struct btrfs_inode_item */
1601 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1602 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1603 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1604 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1605 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1606 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1607 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1608 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1609 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1610 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1611 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1612 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1614 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1615 struct btrfs_inode_item, generation, 64);
1616 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1617 struct btrfs_inode_item, sequence, 64);
1618 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1619 struct btrfs_inode_item, transid, 64);
1620 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1621 struct btrfs_inode_item, size, 64);
1622 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1623 struct btrfs_inode_item, nbytes, 64);
1624 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1625 struct btrfs_inode_item, block_group, 64);
1626 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1627 struct btrfs_inode_item, nlink, 32);
1628 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1629 struct btrfs_inode_item, uid, 32);
1630 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1631 struct btrfs_inode_item, gid, 32);
1632 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1633 struct btrfs_inode_item, mode, 32);
1634 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1635 struct btrfs_inode_item, rdev, 64);
1636 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1637 struct btrfs_inode_item, flags, 64);
1639 static inline struct btrfs_timespec *
1640 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1642 unsigned long ptr = (unsigned long)inode_item;
1643 ptr += offsetof(struct btrfs_inode_item, atime);
1644 return (struct btrfs_timespec *)ptr;
1647 static inline struct btrfs_timespec *
1648 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1650 unsigned long ptr = (unsigned long)inode_item;
1651 ptr += offsetof(struct btrfs_inode_item, mtime);
1652 return (struct btrfs_timespec *)ptr;
1655 static inline struct btrfs_timespec *
1656 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1658 unsigned long ptr = (unsigned long)inode_item;
1659 ptr += offsetof(struct btrfs_inode_item, ctime);
1660 return (struct btrfs_timespec *)ptr;
1663 static inline struct btrfs_timespec *
1664 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1666 unsigned long ptr = (unsigned long)inode_item;
1667 ptr += offsetof(struct btrfs_inode_item, otime);
1668 return (struct btrfs_timespec *)ptr;
1671 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1672 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1673 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1675 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1678 /* struct btrfs_dev_extent */
1679 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1681 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1682 chunk_objectid, 64);
1683 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1685 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1687 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1690 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1692 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1693 return (u8 *)((unsigned long)dev + ptr);
1697 /* struct btrfs_extent_item */
1698 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1699 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1700 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1702 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1703 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1705 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1707 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1709 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1710 struct btrfs_tree_block_info *item,
1711 struct btrfs_disk_key *key)
1713 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1716 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1717 struct btrfs_tree_block_info *item,
1718 struct btrfs_disk_key *key)
1720 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1723 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1725 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1727 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1729 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1732 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1735 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1737 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1739 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1740 struct btrfs_extent_inline_ref, type, 8);
1741 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1742 struct btrfs_extent_inline_ref, offset, 64);
1744 static inline u32 btrfs_extent_inline_ref_size(int type)
1746 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1747 type == BTRFS_SHARED_BLOCK_REF_KEY)
1748 return sizeof(struct btrfs_extent_inline_ref);
1749 if (type == BTRFS_SHARED_DATA_REF_KEY)
1750 return sizeof(struct btrfs_shared_data_ref) +
1751 sizeof(struct btrfs_extent_inline_ref);
1752 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1753 return sizeof(struct btrfs_extent_data_ref) +
1754 offsetof(struct btrfs_extent_inline_ref, offset);
1759 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1760 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1762 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1763 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1765 /* struct btrfs_node */
1766 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1767 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1769 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1772 ptr = offsetof(struct btrfs_node, ptrs) +
1773 sizeof(struct btrfs_key_ptr) * nr;
1774 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1777 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1781 ptr = offsetof(struct btrfs_node, ptrs) +
1782 sizeof(struct btrfs_key_ptr) * nr;
1783 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1786 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1789 ptr = offsetof(struct btrfs_node, ptrs) +
1790 sizeof(struct btrfs_key_ptr) * nr;
1791 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1794 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1798 ptr = offsetof(struct btrfs_node, ptrs) +
1799 sizeof(struct btrfs_key_ptr) * nr;
1800 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1803 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1805 return offsetof(struct btrfs_node, ptrs) +
1806 sizeof(struct btrfs_key_ptr) * nr;
1809 static inline void btrfs_node_key(struct extent_buffer *eb,
1810 struct btrfs_disk_key *disk_key, int nr)
1813 ptr = btrfs_node_key_ptr_offset(nr);
1814 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1815 struct btrfs_key_ptr, key, disk_key);
1818 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1819 struct btrfs_disk_key *disk_key, int nr)
1822 ptr = btrfs_node_key_ptr_offset(nr);
1823 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1824 struct btrfs_key_ptr, key, disk_key);
1827 /* struct btrfs_item */
1828 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1829 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1831 static inline unsigned long btrfs_item_nr_offset(int nr)
1833 return offsetof(struct btrfs_leaf, items) +
1834 sizeof(struct btrfs_item) * nr;
1837 static inline struct btrfs_item *btrfs_item_nr(int nr)
1839 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1842 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1843 struct btrfs_item *item)
1845 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1848 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1850 return btrfs_item_end(eb, btrfs_item_nr(nr));
1853 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1855 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1858 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1860 return btrfs_item_size(eb, btrfs_item_nr(nr));
1863 static inline void btrfs_item_key(struct extent_buffer *eb,
1864 struct btrfs_disk_key *disk_key, int nr)
1866 struct btrfs_item *item = btrfs_item_nr(nr);
1867 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1870 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1871 struct btrfs_disk_key *disk_key, int nr)
1873 struct btrfs_item *item = btrfs_item_nr(nr);
1874 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1877 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1880 * struct btrfs_root_ref
1882 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1883 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1884 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1886 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1887 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1888 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1890 /* struct btrfs_dir_item */
1891 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1892 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1893 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1894 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1896 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1897 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1898 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1899 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1901 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1902 struct btrfs_dir_item *item,
1903 struct btrfs_disk_key *key)
1905 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1908 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1909 struct btrfs_dir_item *item,
1910 struct btrfs_disk_key *key)
1912 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1915 /* struct btrfs_free_space_header */
1916 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1918 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1920 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1923 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1924 struct btrfs_free_space_header *h,
1925 struct btrfs_disk_key *key)
1927 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1930 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1931 struct btrfs_free_space_header *h,
1932 struct btrfs_disk_key *key)
1934 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1937 /* struct btrfs_disk_key */
1938 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1940 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1941 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1943 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1944 struct btrfs_disk_key *disk)
1946 cpu->offset = le64_to_cpu(disk->offset);
1947 cpu->type = disk->type;
1948 cpu->objectid = le64_to_cpu(disk->objectid);
1951 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1952 struct btrfs_key *cpu)
1954 disk->offset = cpu_to_le64(cpu->offset);
1955 disk->type = cpu->type;
1956 disk->objectid = cpu_to_le64(cpu->objectid);
1959 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1960 struct btrfs_key *key, int nr)
1962 struct btrfs_disk_key disk_key;
1963 btrfs_node_key(eb, &disk_key, nr);
1964 btrfs_disk_key_to_cpu(key, &disk_key);
1967 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1968 struct btrfs_key *key, int nr)
1970 struct btrfs_disk_key disk_key;
1971 btrfs_item_key(eb, &disk_key, nr);
1972 btrfs_disk_key_to_cpu(key, &disk_key);
1975 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1976 struct btrfs_dir_item *item,
1977 struct btrfs_key *key)
1979 struct btrfs_disk_key disk_key;
1980 btrfs_dir_item_key(eb, item, &disk_key);
1981 btrfs_disk_key_to_cpu(key, &disk_key);
1984 /* struct btrfs_header */
1985 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1986 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1988 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1989 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1990 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1991 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1992 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1993 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1995 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1996 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1999 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2001 return (btrfs_header_flags(eb) & flag) == flag;
2004 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2006 u64 flags = btrfs_header_flags(eb);
2007 btrfs_set_header_flags(eb, flags | flag);
2008 return (flags & flag) == flag;
2011 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2013 u64 flags = btrfs_header_flags(eb);
2014 btrfs_set_header_flags(eb, flags & ~flag);
2015 return (flags & flag) == flag;
2018 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2020 u64 flags = btrfs_header_flags(eb);
2021 return flags >> BTRFS_BACKREF_REV_SHIFT;
2024 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2027 u64 flags = btrfs_header_flags(eb);
2028 flags &= ~BTRFS_BACKREF_REV_MASK;
2029 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2030 btrfs_set_header_flags(eb, flags);
2033 static inline unsigned long btrfs_header_fsid(void)
2035 return offsetof(struct btrfs_header, fsid);
2038 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2040 return offsetof(struct btrfs_header, chunk_tree_uuid);
2043 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
2045 unsigned long ptr = offsetof(struct btrfs_header, csum);
2049 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2051 return (btrfs_header_level(eb) == 0);
2054 /* struct btrfs_root_item */
2055 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2057 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2058 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2059 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2061 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2063 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2064 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2065 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2066 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2067 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2068 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2069 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2070 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2072 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2074 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2076 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2078 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2080 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2083 /* struct btrfs_root_backup */
2084 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2086 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2088 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2089 tree_root_level, 8);
2091 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2093 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2094 chunk_root_gen, 64);
2095 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2096 chunk_root_level, 8);
2098 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2100 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2101 extent_root_gen, 64);
2102 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2103 extent_root_level, 8);
2105 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2107 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2109 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2112 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2114 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2116 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2119 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2121 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2123 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2124 csum_root_level, 8);
2125 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2127 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2129 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2132 /* struct btrfs_super_block */
2134 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2135 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2136 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2138 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2139 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2140 struct btrfs_super_block, sys_chunk_array_size, 32);
2141 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2142 struct btrfs_super_block, chunk_root_generation, 64);
2143 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2145 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2147 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2148 chunk_root_level, 8);
2149 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2151 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2152 log_root_transid, 64);
2153 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2155 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2157 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2159 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2161 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2163 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2165 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2166 root_dir_objectid, 64);
2167 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2169 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2171 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2172 compat_ro_flags, 64);
2173 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2174 incompat_flags, 64);
2175 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2177 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2178 cache_generation, 64);
2179 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2180 uuid_tree_generation, 64);
2181 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2183 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2185 int t = btrfs_super_csum_type(s);
2186 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2187 return btrfs_csum_sizes[t];
2190 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2192 return offsetof(struct btrfs_leaf, items);
2195 /* struct btrfs_file_extent_item */
2196 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2197 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2199 static inline unsigned long btrfs_file_extent_inline_start(struct
2200 btrfs_file_extent_item *e)
2202 unsigned long offset = (unsigned long)e;
2203 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2207 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2209 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2212 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2214 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2216 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2218 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2220 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2221 disk_num_bytes, 64);
2222 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2224 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2226 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2228 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2230 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2232 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2234 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2236 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2238 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2240 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2241 other_encoding, 16);
2243 /* btrfs_qgroup_status_item */
2244 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2246 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2248 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2250 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2253 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2254 struct btrfs_qgroup_status_item, version, 64);
2255 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2256 struct btrfs_qgroup_status_item, generation, 64);
2257 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2258 struct btrfs_qgroup_status_item, flags, 64);
2259 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2260 struct btrfs_qgroup_status_item, rescan, 64);
2262 /* btrfs_qgroup_info_item */
2263 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2265 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2267 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2268 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2269 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2271 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2272 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2274 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2275 struct btrfs_qgroup_info_item, generation, 64);
2276 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2277 struct btrfs_qgroup_info_item, referenced, 64);
2278 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2279 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2280 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2281 struct btrfs_qgroup_info_item, exclusive, 64);
2282 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2283 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2285 /* btrfs_qgroup_limit_item */
2286 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2288 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2289 max_referenced, 64);
2290 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2292 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2293 rsv_referenced, 64);
2294 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2297 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2298 struct btrfs_qgroup_limit_item, flags, 64);
2299 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2300 struct btrfs_qgroup_limit_item, max_referenced, 64);
2301 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2302 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2303 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2304 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2305 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2306 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2308 /* btrfs_balance_item */
2309 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
2311 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
2312 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2314 unsigned long offset = (unsigned long)bi;
2315 struct btrfs_balance_item *p;
2316 p = (struct btrfs_balance_item *)(eb->data + offset);
2320 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
2321 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2323 unsigned long offset = (unsigned long)bi;
2324 struct btrfs_balance_item *p;
2325 p = (struct btrfs_balance_item *)(eb->data + offset);
2329 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
2330 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2332 unsigned long offset = (unsigned long)bi;
2333 struct btrfs_balance_item *p;
2334 p = (struct btrfs_balance_item *)(eb->data + offset);
2339 * btrfs_dev_stats_item helper, returns pointer to the raw array, do the
2340 * endiannes conversion, @dsi is offset to eb data
2342 static inline __le64* btrfs_dev_stats_values(struct extent_buffer *eb,
2343 struct btrfs_dev_stats_item *dsi)
2345 unsigned long offset = (unsigned long)dsi;
2346 struct btrfs_dev_stats_item *p;
2347 p = (struct btrfs_dev_stats_item *)(eb->data + offset);
2352 * this returns the number of bytes used by the item on disk, minus the
2353 * size of any extent headers. If a file is compressed on disk, this is
2354 * the compressed size
2356 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2357 struct btrfs_item *e)
2359 unsigned long offset;
2360 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2361 return btrfs_item_size(eb, e) - offset;
2364 /* struct btrfs_ioctl_search_header */
2365 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2367 return get_unaligned_64(&sh->transid);
2370 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2372 return get_unaligned_64(&sh->objectid);
2375 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2377 return get_unaligned_64(&sh->offset);
2380 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2382 return get_unaligned_32(&sh->type);
2385 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2387 return get_unaligned_32(&sh->len);
2390 /* this returns the number of file bytes represented by the inline item.
2391 * If an item is compressed, this is the uncompressed size
2393 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2395 struct btrfs_file_extent_item *fi)
2398 * return the space used on disk if this item isn't
2399 * compressed or encoded
2401 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2402 btrfs_file_extent_encryption(eb, fi) == 0 &&
2403 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2404 return btrfs_file_extent_inline_item_len(eb,
2405 btrfs_item_nr(slot));
2408 /* otherwise use the ram bytes field */
2409 return btrfs_file_extent_ram_bytes(eb, fi);
2412 #define btrfs_fs_incompat(fs_info, opt) \
2413 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
2415 static inline int __btrfs_fs_incompat(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_incompat_flags(disk_super) & flag);
2422 #define btrfs_fs_compat_ro(fs_info, opt) \
2423 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
2425 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2427 struct btrfs_super_block *disk_super;
2428 disk_super = fs_info->super_copy;
2429 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2432 /* helper function to cast into the data area of the leaf. */
2433 #define btrfs_item_ptr(leaf, slot, type) \
2434 ((type *)(btrfs_leaf_data(leaf) + \
2435 btrfs_item_offset_nr(leaf, slot)))
2437 #define btrfs_item_ptr_offset(leaf, slot) \
2438 ((unsigned long)(btrfs_leaf_data(leaf) + \
2439 btrfs_item_offset_nr(leaf, slot)))
2442 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2443 struct btrfs_root *root,
2444 u64 num_bytes, u64 empty_size,
2445 u64 hint_byte, u64 search_end,
2446 struct btrfs_key *ins, int data);
2447 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2448 struct btrfs_root *root);
2449 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2450 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2451 u64 bytenr, u64 num_bytes);
2452 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2453 struct btrfs_root *root);
2454 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2455 btrfs_fs_info *info,
2457 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2458 btrfs_fs_info *info,
2460 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2461 struct btrfs_root *root,
2462 u32 blocksize, u64 root_objectid,
2463 struct btrfs_disk_key *key, int level,
2464 u64 hint, u64 empty_size);
2465 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2466 struct btrfs_root *root,
2467 u64 num_bytes, u64 parent,
2468 u64 root_objectid, u64 ref_generation,
2469 u64 owner, u64 empty_size, u64 hint_byte,
2470 u64 search_end, struct btrfs_key *ins, int data);
2471 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2472 struct btrfs_root *root, u64 bytenr,
2473 u64 offset, int metadata, u64 *refs, u64 *flags);
2474 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2475 struct btrfs_root *root,
2476 u64 bytenr, int level, u64 flags);
2477 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2478 struct extent_buffer *buf, int record_parent);
2479 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2480 struct extent_buffer *buf, int record_parent);
2481 int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2482 struct btrfs_root *root,
2483 struct extent_buffer *buf,
2484 u64 parent, int last_ref);
2485 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2486 struct btrfs_root *root,
2487 u64 bytenr, u64 num_bytes, u64 parent,
2488 u64 root_objectid, u64 owner, u64 offset);
2489 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2490 struct btrfs_root *root,
2491 struct extent_io_tree *unpin);
2492 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2493 struct btrfs_root *root,
2494 u64 bytenr, u64 num_bytes, u64 parent,
2495 u64 root_objectid, u64 ref_generation,
2496 u64 owner_objectid);
2497 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2498 struct btrfs_root *root, u64 bytenr,
2499 u64 orig_parent, u64 parent,
2500 u64 root_objectid, u64 ref_generation,
2501 u64 owner_objectid);
2502 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2503 struct btrfs_root *root);
2504 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2505 int btrfs_read_block_groups(struct btrfs_root *root);
2506 struct btrfs_block_group_cache *
2507 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2508 u64 chunk_objectid, u64 chunk_offset, u64 size);
2509 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2510 struct btrfs_root *root, u64 bytes_used,
2511 u64 type, u64 chunk_objectid, u64 chunk_offset,
2513 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2514 struct btrfs_root *root);
2515 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2516 struct btrfs_root *root, u64 bytenr, u64 num,
2517 int alloc, int mark_free);
2518 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2519 struct btrfs_root *root, u64 objectid,
2520 struct btrfs_inode_item *inode,
2521 u64 file_pos, u64 disk_bytenr,
2523 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2524 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2525 void free_excluded_extents(struct btrfs_root *root,
2526 struct btrfs_block_group_cache *cache);
2527 int exclude_super_stripes(struct btrfs_root *root,
2528 struct btrfs_block_group_cache *cache);
2529 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2530 struct btrfs_fs_info *info, u64 start, u64 end);
2531 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2534 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2535 int btrfs_del_ptr(struct btrfs_root *root, struct btrfs_path *path,
2536 int level, int slot);
2537 enum btrfs_tree_block_status
2538 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2539 struct extent_buffer *buf);
2540 enum btrfs_tree_block_status
2541 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2542 struct extent_buffer *buf);
2543 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2544 int level, int slot, u64 objectid);
2545 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2546 struct extent_buffer *parent, int slot);
2547 int btrfs_previous_item(struct btrfs_root *root,
2548 struct btrfs_path *path, u64 min_objectid,
2550 int btrfs_previous_extent_item(struct btrfs_root *root,
2551 struct btrfs_path *path, u64 min_objectid);
2552 int btrfs_next_extent_item(struct btrfs_root *root,
2553 struct btrfs_path *path, u64 max_objectid);
2554 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2555 struct btrfs_root *root, struct extent_buffer *buf,
2556 struct extent_buffer *parent, int parent_slot,
2557 struct extent_buffer **cow_ret);
2558 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2559 struct btrfs_root *root,
2560 struct extent_buffer *buf,
2561 struct extent_buffer *parent, int parent_slot,
2562 struct extent_buffer **cow_ret,
2563 u64 search_start, u64 empty_size);
2564 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2565 struct btrfs_root *root,
2566 struct extent_buffer *buf,
2567 struct extent_buffer **cow_ret, u64 new_root_objectid);
2568 int btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
2570 int btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
2571 u32 new_size, int from_end);
2572 int btrfs_split_item(struct btrfs_trans_handle *trans,
2573 struct btrfs_root *root,
2574 struct btrfs_path *path,
2575 struct btrfs_key *new_key,
2576 unsigned long split_offset);
2577 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2578 *root, struct btrfs_key *key, struct btrfs_path *p, int
2580 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2581 u64 iobjectid, u64 ioff, u8 key_type,
2582 struct btrfs_key *found_key);
2583 void btrfs_release_path(struct btrfs_path *p);
2584 void add_root_to_dirty_list(struct btrfs_root *root);
2585 struct btrfs_path *btrfs_alloc_path(void);
2586 void btrfs_free_path(struct btrfs_path *p);
2587 void btrfs_init_path(struct btrfs_path *p);
2588 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2589 struct btrfs_path *path, int slot, int nr);
2591 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2592 struct btrfs_root *root,
2593 struct btrfs_path *path)
2595 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2598 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2599 *root, struct btrfs_key *key, void *data, u32 data_size);
2600 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2601 struct btrfs_root *root,
2602 struct btrfs_path *path,
2603 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2605 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2606 struct btrfs_root *root,
2607 struct btrfs_path *path,
2608 struct btrfs_key *key,
2611 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2614 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2615 static inline int btrfs_next_item(struct btrfs_root *root,
2616 struct btrfs_path *p)
2619 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2620 return btrfs_next_leaf(root, p);
2624 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2625 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2626 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2627 struct btrfs_disk_key *key, int level);
2628 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2629 struct btrfs_key *new_key);
2630 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2631 struct btrfs_path *path,
2632 struct btrfs_key *new_key);
2635 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2636 struct btrfs_root *tree_root,
2637 u64 root_id, u8 type, u64 ref_id,
2638 u64 dirid, u64 sequence,
2639 const char *name, int name_len);
2640 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2641 *root, struct btrfs_key *key, struct btrfs_root_item
2643 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2644 struct btrfs_key *key);
2645 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2646 *root, struct btrfs_key *key, struct btrfs_root_item
2648 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2649 btrfs_root_item *item, struct btrfs_key *key);
2651 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2652 *root, const char *name, int name_len, u64 dir,
2653 struct btrfs_key *location, u8 type, u64 index);
2654 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2655 struct btrfs_root *root,
2656 struct btrfs_path *path, u64 dir,
2657 const char *name, int name_len,
2659 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2660 struct btrfs_root *root,
2661 struct btrfs_path *path, u64 dir,
2662 const char *name, int name_len,
2663 u64 index, int mod);
2664 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2665 struct btrfs_root *root,
2666 struct btrfs_path *path,
2667 struct btrfs_dir_item *di);
2668 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2669 struct btrfs_root *root, const char *name,
2670 u16 name_len, const void *data, u16 data_len,
2673 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2674 struct btrfs_root *fs_root,
2675 u64 dirid, u64 *objectid);
2678 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2679 struct btrfs_root *root,
2680 const char *name, int name_len,
2681 u64 inode_objectid, u64 ref_objectid, u64 index);
2682 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2683 *root, u64 objectid, struct btrfs_inode_item
2685 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2686 *root, struct btrfs_path *path,
2687 struct btrfs_key *location, int mod);
2688 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2689 *trans, struct btrfs_path *path, struct btrfs_root *root,
2690 u64 ino, u64 parent_ino, u64 index, const char *name,
2691 int namelen, int ins_len);
2692 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2693 struct btrfs_root *root,
2694 const char *name, int name_len,
2695 u64 inode_objectid, u64 ref_objectid,
2697 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2698 struct btrfs_root *root,
2699 const char *name, int name_len,
2700 u64 inode_objectid, u64 ref_objectid, u64 index);
2701 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2702 struct btrfs_root *root, struct btrfs_path *path,
2703 const char *name, int namelen, u64 ino, u64 parent_ino,
2705 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2706 struct btrfs_root *root, const char *name, int name_len,
2707 u64 ino, u64 parent_ino, u64 *index);
2710 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2711 struct btrfs_root *root, u64 bytenr, u64 len);
2712 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2713 struct btrfs_root *root,
2714 u64 objectid, u64 pos, u64 offset,
2717 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2718 struct btrfs_root *root, u64 objectid,
2719 u64 offset, char *buffer, size_t size);
2720 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2721 struct btrfs_root *root, u64 alloc_end,
2722 u64 bytenr, char *data, size_t len);
2723 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2724 struct btrfs_root *root, struct btrfs_path *path,
2728 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2729 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2732 static inline int is_fstree(u64 rootid)
2734 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2735 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2741 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2742 u64 dir, u64 index);
2743 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2745 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2746 struct btrfs_root *root, u64 ino, u64 flags);
2747 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2748 u64 ino, u64 parent_ino, char *name, int namelen,
2749 u8 type, u64 *index, int add_backref);
2750 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2751 u64 ino, u64 parent_ino, u64 index, const char *name,
2752 int namelen, int add_orphan);
2753 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2754 struct btrfs_root *root, struct btrfs_path *path,
2756 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2757 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2760 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2761 struct btrfs_root *root,
2762 struct btrfs_path *path,
2763 u64 ino, u64 offset, u64 len, int ins_len);
2764 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2765 struct btrfs_root *root,
2766 u64 ino, u64 offset, u64 len);
2767 int btrfs_read_file(struct btrfs_root *root, u64 ino, u64 start, int len,