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"
30 #include <btrfs/list.h>
31 #include <btrfs/kerncompat.h>
32 #include <btrfs/radix-tree.h>
33 #include <btrfs/extent-cache.h>
34 #include <btrfs/extent_io.h>
35 #include <btrfs/ioctl.h>
36 #endif /* BTRFS_FLAT_INCLUDES */
39 struct btrfs_trans_handle;
40 struct btrfs_free_space_ctl;
41 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
44 * Fake signature for an unfinalized filesystem, structures might be partially
47 #define BTRFS_MAGIC_PARTIAL 0x4D5F536652484221ULL /* ascii !BHRfS_M, no null */
49 #define BTRFS_MAX_MIRRORS 3
51 #define BTRFS_MAX_LEVEL 8
53 #define BTRFS_COMPAT_EXTENT_TREE_V0
55 /* holds pointers to all of the tree roots */
56 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
58 /* stores information about which extents are in use, and reference counts */
59 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
62 * chunk tree stores translations from logical -> physical block numbering
63 * the super block points to the chunk tree
65 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
68 * stores information about which areas of a given device are in use.
69 * one per device. The tree of tree roots points to the device tree
71 #define BTRFS_DEV_TREE_OBJECTID 4ULL
73 /* one per subvolume, storing files and directories */
74 #define BTRFS_FS_TREE_OBJECTID 5ULL
76 /* directory objectid inside the root tree */
77 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
78 /* holds checksums of all the data extents */
79 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
80 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
82 /* for storing items that use the BTRFS_UUID_KEY* */
83 #define BTRFS_UUID_TREE_OBJECTID 9ULL
85 /* tracks free space in block groups. */
86 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
88 /* device stats in the device tree */
89 #define BTRFS_DEV_STATS_OBJECTID 0ULL
91 /* for storing balance parameters in the root tree */
92 #define BTRFS_BALANCE_OBJECTID -4ULL
94 /* oprhan objectid for tracking unlinked/truncated files */
95 #define BTRFS_ORPHAN_OBJECTID -5ULL
97 /* does write ahead logging to speed up fsyncs */
98 #define BTRFS_TREE_LOG_OBJECTID -6ULL
99 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
101 /* space balancing */
102 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
103 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
106 * extent checksums all have this objectid
107 * this allows them to share the logging tree
110 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
112 /* For storing free space cache */
113 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
116 * The inode number assigned to the special inode for sotring
119 #define BTRFS_FREE_INO_OBJECTID -12ULL
121 /* dummy objectid represents multiple objectids */
122 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
125 * All files have objectids in this range.
127 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
128 #define BTRFS_LAST_FREE_OBJECTID -256ULL
129 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
134 * the device items go into the chunk tree. The key is in the form
135 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
137 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
140 * the max metadata block size. This limit is somewhat artificial,
141 * but the memmove costs go through the roof for larger blocks.
143 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
146 * we can actually store much bigger names, but lets not confuse the rest
149 #define BTRFS_NAME_LEN 255
152 * Theoretical limit is larger, but we keep this down to a sane
153 * value. That should limit greatly the possibility of collisions on
156 #define BTRFS_LINK_MAX 65535U
158 /* 32 bytes in various csum fields */
159 #define BTRFS_CSUM_SIZE 32
162 #define BTRFS_CSUM_TYPE_CRC32 0
164 static int btrfs_csum_sizes[] = { 4 };
166 /* four bytes for CRC32 */
167 #define BTRFS_CRC32_SIZE 4
168 #define BTRFS_EMPTY_DIR_SIZE 0
170 #define BTRFS_FT_UNKNOWN 0
171 #define BTRFS_FT_REG_FILE 1
172 #define BTRFS_FT_DIR 2
173 #define BTRFS_FT_CHRDEV 3
174 #define BTRFS_FT_BLKDEV 4
175 #define BTRFS_FT_FIFO 5
176 #define BTRFS_FT_SOCK 6
177 #define BTRFS_FT_SYMLINK 7
178 #define BTRFS_FT_XATTR 8
179 #define BTRFS_FT_MAX 9
181 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
184 * the key defines the order in the tree, and so it also defines (optimal)
185 * block layout. objectid corresponds to the inode number. The flags
186 * tells us things about the object, and is a kind of stream selector.
187 * so for a given inode, keys with flags of 1 might refer to the inode
188 * data, flags of 2 may point to file data in the btree and flags == 3
189 * may point to extents.
191 * offset is the starting byte offset for this key in the stream.
193 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
194 * in cpu native order. Otherwise they are identical and their sizes
195 * should be the same (ie both packed)
197 struct btrfs_disk_key {
201 } __attribute__ ((__packed__));
207 } __attribute__ ((__packed__));
209 struct btrfs_mapping_tree {
210 struct cache_tree cache_tree;
213 #define BTRFS_UUID_SIZE 16
214 struct btrfs_dev_item {
215 /* the internal btrfs device id */
218 /* size of the device */
224 /* optimal io alignment for this device */
227 /* optimal io width for this device */
230 /* minimal io size for this device */
233 /* type and info about this device */
236 /* expected generation for this device */
240 * starting byte of this partition on the device,
241 * to allow for stripe alignment in the future
245 /* grouping information for allocation decisions */
248 /* seek speed 0-100 where 100 is fastest */
251 /* bandwidth 0-100 where 100 is fastest */
254 /* btrfs generated uuid for this device */
255 u8 uuid[BTRFS_UUID_SIZE];
257 /* uuid of FS who owns this device */
258 u8 fsid[BTRFS_UUID_SIZE];
259 } __attribute__ ((__packed__));
261 struct btrfs_stripe {
264 u8 dev_uuid[BTRFS_UUID_SIZE];
265 } __attribute__ ((__packed__));
268 /* size of this chunk in bytes */
271 /* objectid of the root referencing this chunk */
277 /* optimal io alignment for this chunk */
280 /* optimal io width for this chunk */
283 /* minimal io size for this chunk */
286 /* 2^16 stripes is quite a lot, a second limit is the size of a single
291 /* sub stripes only matter for raid10 */
293 struct btrfs_stripe stripe;
294 /* additional stripes go here */
295 } __attribute__ ((__packed__));
297 #define BTRFS_FREE_SPACE_EXTENT 1
298 #define BTRFS_FREE_SPACE_BITMAP 2
300 struct btrfs_free_space_entry {
304 } __attribute__ ((__packed__));
306 struct btrfs_free_space_header {
307 struct btrfs_disk_key location;
311 } __attribute__ ((__packed__));
313 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
315 BUG_ON(num_stripes == 0);
316 return sizeof(struct btrfs_chunk) +
317 sizeof(struct btrfs_stripe) * (num_stripes - 1);
320 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
321 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
322 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
323 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
324 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
325 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
327 #define BTRFS_BACKREF_REV_MAX 256
328 #define BTRFS_BACKREF_REV_SHIFT 56
329 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
330 BTRFS_BACKREF_REV_SHIFT)
332 #define BTRFS_OLD_BACKREF_REV 0
333 #define BTRFS_MIXED_BACKREF_REV 1
336 * every tree block (leaf or node) starts with this header.
338 struct btrfs_header {
339 /* these first four must match the super block */
340 u8 csum[BTRFS_CSUM_SIZE];
341 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
342 __le64 bytenr; /* which block this node is supposed to live in */
345 /* allowed to be different from the super from here on down */
346 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
351 } __attribute__ ((__packed__));
353 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
354 sizeof(struct btrfs_header)) / \
355 sizeof(struct btrfs_key_ptr))
356 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
357 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
358 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
359 sizeof(struct btrfs_item) - \
360 sizeof(struct btrfs_file_extent_item))
361 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
362 sizeof(struct btrfs_item) -\
363 sizeof(struct btrfs_dir_item))
367 * this is a very generous portion of the super block, giving us
368 * room to translate 14 chunks with 3 stripes each.
370 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
371 #define BTRFS_LABEL_SIZE 256
374 * just in case we somehow lose the roots and are not able to mount,
375 * we store an array of the roots from previous transactions
378 #define BTRFS_NUM_BACKUP_ROOTS 4
379 struct btrfs_root_backup {
381 __le64 tree_root_gen;
384 __le64 chunk_root_gen;
387 __le64 extent_root_gen;
396 __le64 csum_root_gen;
406 u8 extent_root_level;
410 /* future and to align */
412 } __attribute__ ((__packed__));
415 * the super block basically lists the main trees of the FS
416 * it currently lacks any block count etc etc
418 struct btrfs_super_block {
419 u8 csum[BTRFS_CSUM_SIZE];
420 /* the first 3 fields must match struct btrfs_header */
421 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
422 __le64 bytenr; /* this block number */
425 /* allowed to be different from the btrfs_header from here own down */
432 /* this will help find the new super based on the log root */
433 __le64 log_root_transid;
436 __le64 root_dir_objectid;
440 /* Unused and must be equal to nodesize */
443 __le32 sys_chunk_array_size;
444 __le64 chunk_root_generation;
446 __le64 compat_ro_flags;
447 __le64 incompat_flags;
452 struct btrfs_dev_item dev_item;
454 char label[BTRFS_LABEL_SIZE];
456 __le64 cache_generation;
457 __le64 uuid_tree_generation;
459 /* future expansion */
461 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
462 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
463 } __attribute__ ((__packed__));
466 * Compat flags that we support. If any incompat flags are set other than the
467 * ones specified below then we will fail to mount
469 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
471 * Older kernels on big-endian systems produced broken free space tree bitmaps,
472 * and btrfs-progs also used to corrupt the free space tree. If this bit is
473 * clear, then the free space tree cannot be trusted. btrfs-progs can also
474 * intentionally clear this bit to ask the kernel to rebuild the free space
477 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
479 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
480 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
481 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
482 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
485 * some patches floated around with a second compression method
486 * lets save that incompat here for when they do get in
487 * Note we don't actually support it, we're just reserving the
490 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
493 * older kernels tried to do bigger metadata blocks, but the
494 * code was pretty buggy. Lets not let them try anymore.
496 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
497 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
498 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
499 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
500 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
502 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
505 * The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be
506 * added here until read-write support for the free space tree is implemented in
509 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
511 #define BTRFS_FEATURE_INCOMPAT_SUPP \
512 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
513 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
514 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
515 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
516 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
517 BTRFS_FEATURE_INCOMPAT_RAID56 | \
518 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
519 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
520 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
523 * A leaf is full of items. offset and size tell us where to find
524 * the item in the leaf (relative to the start of the data area)
527 struct btrfs_disk_key key;
530 } __attribute__ ((__packed__));
533 * leaves have an item area and a data area:
534 * [item0, item1....itemN] [free space] [dataN...data1, data0]
536 * The data is separate from the items to get the keys closer together
540 struct btrfs_header header;
541 struct btrfs_item items[];
542 } __attribute__ ((__packed__));
545 * all non-leaf blocks are nodes, they hold only keys and pointers to
548 struct btrfs_key_ptr {
549 struct btrfs_disk_key key;
552 } __attribute__ ((__packed__));
555 struct btrfs_header header;
556 struct btrfs_key_ptr ptrs[];
557 } __attribute__ ((__packed__));
560 * btrfs_paths remember the path taken from the root down to the leaf.
561 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
562 * to any other levels that are present.
564 * The slots array records the index of the item or block pointer
565 * used while walking the tree.
569 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
570 int slots[BTRFS_MAX_LEVEL];
572 /* The kernel locking sheme is not done in userspace. */
573 int locks[BTRFS_MAX_LEVEL];
576 /* keep some upper locks as we walk down */
580 * set by btrfs_split_item, tells search_slot to keep all locks
581 * and to force calls to keep space in the nodes
588 * items in the extent btree are used to record the objectid of the
589 * owner of the block and the number of references
592 struct btrfs_extent_item {
596 } __attribute__ ((__packed__));
598 struct btrfs_extent_item_v0 {
600 } __attribute__ ((__packed__));
602 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
603 sizeof(struct btrfs_item))
604 #define BTRFS_MAX_EXTENT_SIZE (128 * 1024 * 1024)
606 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
607 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
609 /* following flags only apply to tree blocks */
611 /* use full backrefs for extent pointers in the block*/
612 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
614 struct btrfs_tree_block_info {
615 struct btrfs_disk_key key;
617 } __attribute__ ((__packed__));
619 struct btrfs_extent_data_ref {
624 } __attribute__ ((__packed__));
626 struct btrfs_shared_data_ref {
628 } __attribute__ ((__packed__));
630 struct btrfs_extent_inline_ref {
633 } __attribute__ ((__packed__));
635 struct btrfs_extent_ref_v0 {
640 } __attribute__ ((__packed__));
642 /* dev extents record free space on individual devices. The owner
643 * field points back to the chunk allocation mapping tree that allocated
644 * the extent. The chunk tree uuid field is a way to double check the owner
646 struct btrfs_dev_extent {
648 __le64 chunk_objectid;
651 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
652 } __attribute__ ((__packed__));
654 struct btrfs_inode_ref {
658 } __attribute__ ((__packed__));
660 struct btrfs_inode_extref {
661 __le64 parent_objectid;
664 __u8 name[0]; /* name goes here */
665 } __attribute__ ((__packed__));
667 struct btrfs_timespec {
670 } __attribute__ ((__packed__));
673 BTRFS_COMPRESS_NONE = 0,
674 BTRFS_COMPRESS_ZLIB = 1,
675 BTRFS_COMPRESS_LZO = 2,
676 BTRFS_COMPRESS_TYPES = 2,
677 BTRFS_COMPRESS_LAST = 3,
678 } btrfs_compression_type;
680 /* we don't understand any encryption methods right now */
682 BTRFS_ENCRYPTION_NONE = 0,
683 BTRFS_ENCRYPTION_LAST = 1,
684 } btrfs_encryption_type;
686 enum btrfs_tree_block_status {
687 BTRFS_TREE_BLOCK_CLEAN,
688 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
689 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
690 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
691 BTRFS_TREE_BLOCK_INVALID_LEVEL,
692 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
693 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
696 struct btrfs_inode_item {
697 /* nfs style generation number */
699 /* transid that last touched this inode */
711 /* modification sequence number for NFS */
715 * a little future expansion, for more than this we can
716 * just grow the inode item and version it
719 struct btrfs_timespec atime;
720 struct btrfs_timespec ctime;
721 struct btrfs_timespec mtime;
722 struct btrfs_timespec otime;
723 } __attribute__ ((__packed__));
725 struct btrfs_dir_log_item {
727 } __attribute__ ((__packed__));
729 struct btrfs_dir_item {
730 struct btrfs_disk_key location;
735 } __attribute__ ((__packed__));
737 struct btrfs_root_item_v0 {
738 struct btrfs_inode_item inode;
744 __le64 last_snapshot;
747 struct btrfs_disk_key drop_progress;
750 } __attribute__ ((__packed__));
752 struct btrfs_root_item {
753 struct btrfs_inode_item inode;
759 __le64 last_snapshot;
762 struct btrfs_disk_key drop_progress;
767 * The following fields appear after subvol_uuids+subvol_times
772 * This generation number is used to test if the new fields are valid
773 * and up to date while reading the root item. Every time the root item
774 * is written out, the "generation" field is copied into this field. If
775 * anyone ever mounted the fs with an older kernel, we will have
776 * mismatching generation values here and thus must invalidate the
777 * new fields. See btrfs_update_root and btrfs_find_last_root for
779 * the offset of generation_v2 is also used as the start for the memset
780 * when invalidating the fields.
782 __le64 generation_v2;
783 u8 uuid[BTRFS_UUID_SIZE];
784 u8 parent_uuid[BTRFS_UUID_SIZE];
785 u8 received_uuid[BTRFS_UUID_SIZE];
786 __le64 ctransid; /* updated when an inode changes */
787 __le64 otransid; /* trans when created */
788 __le64 stransid; /* trans when sent. non-zero for received subvol */
789 __le64 rtransid; /* trans when received. non-zero for received subvol */
790 struct btrfs_timespec ctime;
791 struct btrfs_timespec otime;
792 struct btrfs_timespec stime;
793 struct btrfs_timespec rtime;
794 __le64 reserved[8]; /* for future */
795 } __attribute__ ((__packed__));
798 * this is used for both forward and backward root refs
800 struct btrfs_root_ref {
804 } __attribute__ ((__packed__));
806 struct btrfs_disk_balance_args {
808 * profiles to operate on, single is denoted by
809 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
815 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
816 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
829 /* devid subset filter [pstart..pend) */
833 /* btrfs virtual address space subset filter [vstart..vend) */
838 * profile to convert to, single is denoted by
839 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
843 /* BTRFS_BALANCE_ARGS_* */
847 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
848 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
860 * Process chunks that cross stripes_min..stripes_max devices,
861 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
867 } __attribute__ ((__packed__));
870 * store balance parameters to disk so that balance can be properly
871 * resumed after crash or unmount
873 struct btrfs_balance_item {
874 /* BTRFS_BALANCE_* */
877 struct btrfs_disk_balance_args data;
878 struct btrfs_disk_balance_args meta;
879 struct btrfs_disk_balance_args sys;
882 } __attribute__ ((__packed__));
884 #define BTRFS_FILE_EXTENT_INLINE 0
885 #define BTRFS_FILE_EXTENT_REG 1
886 #define BTRFS_FILE_EXTENT_PREALLOC 2
888 struct btrfs_file_extent_item {
890 * transaction id that created this extent
894 * max number of bytes to hold this extent in ram
895 * when we split a compressed extent we can't know how big
896 * each of the resulting pieces will be. So, this is
897 * an upper limit on the size of the extent in ram instead of
903 * 32 bits for the various ways we might encode the data,
904 * including compression and encryption. If any of these
905 * are set to something a given disk format doesn't understand
906 * it is treated like an incompat flag for reading and writing,
911 __le16 other_encoding; /* spare for later use */
913 /* are we inline data or a real extent? */
917 * disk space consumed by the extent, checksum blocks are included
921 __le64 disk_num_bytes;
923 * the logical offset in file blocks (no csums)
924 * this extent record is for. This allows a file extent to point
925 * into the middle of an existing extent on disk, sharing it
926 * between two snapshots (useful if some bytes in the middle of the
927 * extent have changed
931 * the logical number of file blocks (no csums included)
935 } __attribute__ ((__packed__));
937 struct btrfs_dev_stats_item {
939 * grow this item struct at the end for future enhancements and keep
940 * the existing values unchanged
942 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
943 } __attribute__ ((__packed__));
945 struct btrfs_csum_item {
947 } __attribute__ ((__packed__));
950 * We don't want to overwrite 1M at the beginning of device, even though
951 * there is our 1st superblock at 64k. Some possible reasons:
952 * - the first 64k blank is useful for some boot loader/manager
953 * - the first 1M could be scratched by buggy partitioner or somesuch
955 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
957 /* tag for the radix tree of block groups in ram */
958 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
959 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
960 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
961 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
962 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
963 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
964 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
965 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
966 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
967 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
968 #define BTRFS_NR_RAID_TYPES 7
970 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
971 BTRFS_BLOCK_GROUP_SYSTEM | \
972 BTRFS_BLOCK_GROUP_METADATA)
974 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
975 BTRFS_BLOCK_GROUP_RAID1 | \
976 BTRFS_BLOCK_GROUP_RAID5 | \
977 BTRFS_BLOCK_GROUP_RAID6 | \
978 BTRFS_BLOCK_GROUP_DUP | \
979 BTRFS_BLOCK_GROUP_RAID10)
981 /* used in struct btrfs_balance_args fields */
982 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
985 * GLOBAL_RSV does not exist as a on-disk block group type and is used
986 * internally for exporting info about global block reserve from space infos
988 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
990 #define BTRFS_QGROUP_LEVEL_SHIFT 48
992 static inline u64 btrfs_qgroup_level(u64 qgroupid)
994 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
997 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
999 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
1002 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1003 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1004 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1006 struct btrfs_qgroup_status_item {
1010 __le64 rescan; /* progress during scanning */
1011 } __attribute__ ((__packed__));
1013 struct btrfs_block_group_item {
1015 __le64 chunk_objectid;
1017 } __attribute__ ((__packed__));
1019 struct btrfs_free_space_info {
1020 __le32 extent_count;
1022 } __attribute__ ((__packed__));
1024 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1026 struct btrfs_qgroup_info_item {
1029 __le64 referenced_compressed;
1031 __le64 exclusive_compressed;
1032 } __attribute__ ((__packed__));
1034 /* flags definition for qgroup limits */
1035 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1036 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1037 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1038 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1039 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1040 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1042 struct btrfs_qgroup_limit_item {
1044 __le64 max_referenced;
1045 __le64 max_exclusive;
1046 __le64 rsv_referenced;
1047 __le64 rsv_exclusive;
1048 } __attribute__ ((__packed__));
1050 struct btrfs_space_info {
1056 struct list_head list;
1059 struct btrfs_block_group_cache {
1060 struct cache_extent cache;
1061 struct btrfs_key key;
1062 struct btrfs_block_group_item item;
1063 struct btrfs_space_info *space_info;
1064 struct btrfs_free_space_ctl *free_space_ctl;
1072 struct btrfs_device;
1073 struct btrfs_fs_devices;
1074 struct btrfs_fs_info {
1075 u8 fsid[BTRFS_FSID_SIZE];
1077 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1078 u8 *new_chunk_tree_uuid;
1079 struct btrfs_root *fs_root;
1080 struct btrfs_root *extent_root;
1081 struct btrfs_root *tree_root;
1082 struct btrfs_root *chunk_root;
1083 struct btrfs_root *dev_root;
1084 struct btrfs_root *csum_root;
1085 struct btrfs_root *quota_root;
1086 struct btrfs_root *free_space_root;
1088 struct rb_root fs_root_tree;
1090 /* the log root tree is a directory of all the other log roots */
1091 struct btrfs_root *log_root_tree;
1093 struct extent_io_tree extent_cache;
1094 struct extent_io_tree free_space_cache;
1095 struct extent_io_tree block_group_cache;
1096 struct extent_io_tree pinned_extents;
1097 struct extent_io_tree pending_del;
1098 struct extent_io_tree extent_ins;
1099 struct extent_io_tree *excluded_extents;
1101 /* logical->physical extent mapping */
1102 struct btrfs_mapping_tree mapping_tree;
1105 u64 last_trans_committed;
1107 u64 avail_data_alloc_bits;
1108 u64 avail_metadata_alloc_bits;
1109 u64 avail_system_alloc_bits;
1110 u64 data_alloc_profile;
1111 u64 metadata_alloc_profile;
1112 u64 system_alloc_profile;
1115 struct btrfs_trans_handle *running_transaction;
1116 struct btrfs_super_block *super_copy;
1117 struct mutex fs_mutex;
1122 struct list_head dirty_cowonly_roots;
1123 struct list_head recow_ebs;
1125 struct btrfs_fs_devices *fs_devices;
1126 struct list_head space_info;
1129 unsigned int readonly:1;
1130 unsigned int on_restoring:1;
1131 unsigned int is_chunk_recover:1;
1132 unsigned int quota_enabled:1;
1133 unsigned int suppress_check_block_errors:1;
1134 unsigned int ignore_fsid_mismatch:1;
1135 unsigned int ignore_chunk_tree_error:1;
1136 unsigned int avoid_meta_chunk_alloc:1;
1137 unsigned int avoid_sys_chunk_alloc:1;
1138 unsigned int finalize_on_close:1;
1140 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1141 struct btrfs_root *root,
1142 u64 bytenr, u64 num_bytes, u64 parent,
1143 u64 root_objectid, u64 owner, u64 offset,
1145 struct cache_tree *fsck_extent_cache;
1146 struct cache_tree *corrupt_blocks;
1151 * in ram representation of the tree. extent_root is used for all allocations
1152 * and for the extent tree extent_root root.
1155 struct extent_buffer *node;
1156 struct extent_buffer *commit_root;
1157 struct btrfs_root_item root_item;
1158 struct btrfs_key root_key;
1159 struct btrfs_fs_info *fs_info;
1163 /* data allocations are done in sectorsize units */
1166 /* node allocations are done in nodesize units */
1169 /* Unused, equal to nodesize */
1172 /* leaf allocations are done in nodesize units */
1180 u64 last_inode_alloc;
1183 * Record orphan data extent ref
1185 * TODO: Don't restore things in btrfs_root.
1186 * Directly record it into inode_record, which needs a lot of
1187 * infrastructure change to allow cooperation between extent
1190 struct list_head orphan_data_extents;
1192 /* the dirty list is only used by non-reference counted roots */
1193 struct list_head dirty_list;
1194 struct rb_node rb_node;
1198 * inode items have the data typically returned from stat and store other
1199 * info about object characteristics. There is one for every file and dir in
1202 #define BTRFS_INODE_ITEM_KEY 1
1203 #define BTRFS_INODE_REF_KEY 12
1204 #define BTRFS_INODE_EXTREF_KEY 13
1205 #define BTRFS_XATTR_ITEM_KEY 24
1206 #define BTRFS_ORPHAN_ITEM_KEY 48
1208 #define BTRFS_DIR_LOG_ITEM_KEY 60
1209 #define BTRFS_DIR_LOG_INDEX_KEY 72
1211 * dir items are the name -> inode pointers in a directory. There is one
1212 * for every name in a directory.
1214 #define BTRFS_DIR_ITEM_KEY 84
1215 #define BTRFS_DIR_INDEX_KEY 96
1218 * extent data is for file data
1220 #define BTRFS_EXTENT_DATA_KEY 108
1223 * csum items have the checksums for data in the extents
1225 #define BTRFS_CSUM_ITEM_KEY 120
1227 * extent csums are stored in a separate tree and hold csums for
1228 * an entire extent on disk.
1230 #define BTRFS_EXTENT_CSUM_KEY 128
1233 * root items point to tree roots. There are typically in the root
1234 * tree used by the super block to find all the other trees
1236 #define BTRFS_ROOT_ITEM_KEY 132
1239 * root backrefs tie subvols and snapshots to the directory entries that
1242 #define BTRFS_ROOT_BACKREF_KEY 144
1245 * root refs make a fast index for listing all of the snapshots and
1246 * subvolumes referenced by a given root. They point directly to the
1247 * directory item in the root that references the subvol
1249 #define BTRFS_ROOT_REF_KEY 156
1252 * extent items are in the extent map tree. These record which blocks
1253 * are used, and how many references there are to each block
1255 #define BTRFS_EXTENT_ITEM_KEY 168
1258 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1259 * the length, so we save the level in key->offset instead of the length.
1261 #define BTRFS_METADATA_ITEM_KEY 169
1263 #define BTRFS_TREE_BLOCK_REF_KEY 176
1265 #define BTRFS_EXTENT_DATA_REF_KEY 178
1267 /* old style extent backrefs */
1268 #define BTRFS_EXTENT_REF_V0_KEY 180
1270 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1272 #define BTRFS_SHARED_DATA_REF_KEY 184
1276 * block groups give us hints into the extent allocation trees. Which
1277 * blocks are free etc etc
1279 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1282 * Every block group is represented in the free space tree by a free space info
1283 * item, which stores some accounting information. It is keyed on
1284 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1286 #define BTRFS_FREE_SPACE_INFO_KEY 198
1289 * A free space extent tracks an extent of space that is free in a block group.
1290 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1292 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1295 * When a block group becomes very fragmented, we convert it to use bitmaps
1296 * instead of extents. A free space bitmap is keyed on
1297 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1298 * (length / sectorsize) bits.
1300 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1302 #define BTRFS_DEV_EXTENT_KEY 204
1303 #define BTRFS_DEV_ITEM_KEY 216
1304 #define BTRFS_CHUNK_ITEM_KEY 228
1306 #define BTRFS_BALANCE_ITEM_KEY 248
1311 #define BTRFS_QGROUP_STATUS_KEY 240
1312 #define BTRFS_QGROUP_INFO_KEY 242
1313 #define BTRFS_QGROUP_LIMIT_KEY 244
1314 #define BTRFS_QGROUP_RELATION_KEY 246
1317 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1319 #define BTRFS_BALANCE_ITEM_KEY 248
1322 * The key type for tree items that are stored persistently, but do not need to
1323 * exist for extended period of time. The items can exist in any tree.
1325 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1329 * - balance status item
1330 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1332 #define BTRFS_TEMPORARY_ITEM_KEY 248
1335 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1337 #define BTRFS_DEV_STATS_KEY 249
1340 * The key type for tree items that are stored persistently and usually exist
1341 * for a long period, eg. filesystem lifetime. The item kinds can be status
1342 * information, stats or preference values. The item can exist in any tree.
1344 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1348 * - device statistics, store IO stats in the device tree, one key for all
1350 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1352 #define BTRFS_PERSISTENT_ITEM_KEY 249
1355 * Persistently stores the device replace state in the device tree.
1356 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1358 #define BTRFS_DEV_REPLACE_KEY 250
1361 * Stores items that allow to quickly map UUIDs to something else.
1362 * These items are part of the filesystem UUID tree.
1363 * The key is built like this:
1364 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1366 #if BTRFS_UUID_SIZE != 16
1367 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1369 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1370 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1371 * received subvols */
1374 * string items are for debugging. They just store a short string of
1377 #define BTRFS_STRING_ITEM_KEY 253
1381 #define BTRFS_INODE_NODATASUM (1 << 0)
1382 #define BTRFS_INODE_NODATACOW (1 << 1)
1383 #define BTRFS_INODE_READONLY (1 << 2)
1384 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1385 #define BTRFS_INODE_PREALLOC (1 << 4)
1386 #define BTRFS_INODE_SYNC (1 << 5)
1387 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1388 #define BTRFS_INODE_APPEND (1 << 7)
1389 #define BTRFS_INODE_NODUMP (1 << 8)
1390 #define BTRFS_INODE_NOATIME (1 << 9)
1391 #define BTRFS_INODE_DIRSYNC (1 << 10)
1392 #define BTRFS_INODE_COMPRESS (1 << 11)
1394 #define read_eb_member(eb, ptr, type, member, result) ( \
1395 read_extent_buffer(eb, (char *)(result), \
1396 ((unsigned long)(ptr)) + \
1397 offsetof(type, member), \
1398 sizeof(((type *)0)->member)))
1400 #define write_eb_member(eb, ptr, type, member, result) ( \
1401 write_extent_buffer(eb, (char *)(result), \
1402 ((unsigned long)(ptr)) + \
1403 offsetof(type, member), \
1404 sizeof(((type *)0)->member)))
1406 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1407 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1409 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1410 return le##bits##_to_cpu(h->member); \
1412 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1415 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1416 h->member = cpu_to_le##bits(val); \
1419 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1420 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1423 unsigned long offset = (unsigned long)s; \
1424 const type *p = (type *) (eb->data + offset); \
1425 return get_unaligned_le##bits(&p->member); \
1427 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1428 type *s, u##bits val) \
1430 unsigned long offset = (unsigned long)s; \
1431 type *p = (type *) (eb->data + offset); \
1432 put_unaligned_le##bits(val, &p->member); \
1435 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1436 static inline u##bits btrfs_##name(const type *s) \
1438 return le##bits##_to_cpu(s->member); \
1440 static inline void btrfs_set_##name(type *s, u##bits val) \
1442 s->member = cpu_to_le##bits(val); \
1445 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1446 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1447 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1448 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1449 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1450 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1452 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1453 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1454 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1455 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1456 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1457 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1459 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1460 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1462 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1464 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1466 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1468 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1470 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1471 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1473 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1475 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1477 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1480 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1482 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1485 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1487 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1490 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1491 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1492 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1493 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1494 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1495 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1496 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1497 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1498 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1499 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1500 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1502 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1504 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1507 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1508 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1509 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1511 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1513 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1515 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1517 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1518 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1520 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1522 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1523 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1525 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1528 unsigned long offset = (unsigned long)c;
1529 offset += offsetof(struct btrfs_chunk, stripe);
1530 offset += nr * sizeof(struct btrfs_stripe);
1531 return (struct btrfs_stripe *)offset;
1534 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1536 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1539 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1540 struct btrfs_chunk *c, int nr)
1542 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1545 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1546 struct btrfs_chunk *c, int nr,
1549 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1552 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1553 struct btrfs_chunk *c, int nr)
1555 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1558 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1559 struct btrfs_chunk *c, int nr,
1562 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1565 /* struct btrfs_block_group_item */
1566 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1568 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1570 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1571 struct btrfs_block_group_item, chunk_objectid, 64);
1573 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1574 struct btrfs_block_group_item, chunk_objectid, 64);
1575 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1576 struct btrfs_block_group_item, flags, 64);
1577 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1578 struct btrfs_block_group_item, flags, 64);
1580 /* struct btrfs_free_space_info */
1581 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1583 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1585 /* struct btrfs_inode_ref */
1586 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1587 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1588 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1590 /* struct btrfs_inode_extref */
1591 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1592 parent_objectid, 64);
1593 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1595 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1597 /* struct btrfs_inode_item */
1598 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1599 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1600 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1601 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1602 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1603 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1604 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1605 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1606 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1607 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1608 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1609 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1611 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1612 struct btrfs_inode_item, generation, 64);
1613 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1614 struct btrfs_inode_item, sequence, 64);
1615 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1616 struct btrfs_inode_item, transid, 64);
1617 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1618 struct btrfs_inode_item, size, 64);
1619 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1620 struct btrfs_inode_item, nbytes, 64);
1621 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1622 struct btrfs_inode_item, block_group, 64);
1623 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1624 struct btrfs_inode_item, nlink, 32);
1625 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1626 struct btrfs_inode_item, uid, 32);
1627 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1628 struct btrfs_inode_item, gid, 32);
1629 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1630 struct btrfs_inode_item, mode, 32);
1631 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1632 struct btrfs_inode_item, rdev, 64);
1633 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1634 struct btrfs_inode_item, flags, 64);
1636 static inline struct btrfs_timespec *
1637 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1639 unsigned long ptr = (unsigned long)inode_item;
1640 ptr += offsetof(struct btrfs_inode_item, atime);
1641 return (struct btrfs_timespec *)ptr;
1644 static inline struct btrfs_timespec *
1645 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1647 unsigned long ptr = (unsigned long)inode_item;
1648 ptr += offsetof(struct btrfs_inode_item, mtime);
1649 return (struct btrfs_timespec *)ptr;
1652 static inline struct btrfs_timespec *
1653 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1655 unsigned long ptr = (unsigned long)inode_item;
1656 ptr += offsetof(struct btrfs_inode_item, ctime);
1657 return (struct btrfs_timespec *)ptr;
1660 static inline struct btrfs_timespec *
1661 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1663 unsigned long ptr = (unsigned long)inode_item;
1664 ptr += offsetof(struct btrfs_inode_item, otime);
1665 return (struct btrfs_timespec *)ptr;
1668 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1669 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1670 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1672 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1675 /* struct btrfs_dev_extent */
1676 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1678 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1679 chunk_objectid, 64);
1680 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1682 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1684 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1687 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1689 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1690 return (u8 *)((unsigned long)dev + ptr);
1694 /* struct btrfs_extent_item */
1695 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1696 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1697 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1699 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1700 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1702 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1704 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1706 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1707 struct btrfs_tree_block_info *item,
1708 struct btrfs_disk_key *key)
1710 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1713 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1714 struct btrfs_tree_block_info *item,
1715 struct btrfs_disk_key *key)
1717 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1720 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1722 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1724 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1726 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1729 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1732 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1734 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1736 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1737 struct btrfs_extent_inline_ref, type, 8);
1738 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1739 struct btrfs_extent_inline_ref, offset, 64);
1741 static inline u32 btrfs_extent_inline_ref_size(int type)
1743 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1744 type == BTRFS_SHARED_BLOCK_REF_KEY)
1745 return sizeof(struct btrfs_extent_inline_ref);
1746 if (type == BTRFS_SHARED_DATA_REF_KEY)
1747 return sizeof(struct btrfs_shared_data_ref) +
1748 sizeof(struct btrfs_extent_inline_ref);
1749 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1750 return sizeof(struct btrfs_extent_data_ref) +
1751 offsetof(struct btrfs_extent_inline_ref, offset);
1756 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1757 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1759 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1760 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1762 /* struct btrfs_node */
1763 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1764 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1766 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1769 ptr = offsetof(struct btrfs_node, ptrs) +
1770 sizeof(struct btrfs_key_ptr) * nr;
1771 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1774 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1778 ptr = offsetof(struct btrfs_node, ptrs) +
1779 sizeof(struct btrfs_key_ptr) * nr;
1780 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1783 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1786 ptr = offsetof(struct btrfs_node, ptrs) +
1787 sizeof(struct btrfs_key_ptr) * nr;
1788 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1791 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1795 ptr = offsetof(struct btrfs_node, ptrs) +
1796 sizeof(struct btrfs_key_ptr) * nr;
1797 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1800 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1802 return offsetof(struct btrfs_node, ptrs) +
1803 sizeof(struct btrfs_key_ptr) * nr;
1806 static inline void btrfs_node_key(struct extent_buffer *eb,
1807 struct btrfs_disk_key *disk_key, int nr)
1810 ptr = btrfs_node_key_ptr_offset(nr);
1811 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1812 struct btrfs_key_ptr, key, disk_key);
1815 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1816 struct btrfs_disk_key *disk_key, int nr)
1819 ptr = btrfs_node_key_ptr_offset(nr);
1820 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1821 struct btrfs_key_ptr, key, disk_key);
1824 /* struct btrfs_item */
1825 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1826 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1828 static inline unsigned long btrfs_item_nr_offset(int nr)
1830 return offsetof(struct btrfs_leaf, items) +
1831 sizeof(struct btrfs_item) * nr;
1834 static inline struct btrfs_item *btrfs_item_nr(int nr)
1836 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1839 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1840 struct btrfs_item *item)
1842 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1845 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1847 return btrfs_item_end(eb, btrfs_item_nr(nr));
1850 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1852 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1855 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1857 return btrfs_item_size(eb, btrfs_item_nr(nr));
1860 static inline void btrfs_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 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1867 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1868 struct btrfs_disk_key *disk_key, int nr)
1870 struct btrfs_item *item = btrfs_item_nr(nr);
1871 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1874 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1877 * struct btrfs_root_ref
1879 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1880 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1881 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1883 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1884 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1885 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1887 /* struct btrfs_dir_item */
1888 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1889 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1890 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1891 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1893 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1894 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1895 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1896 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1898 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1899 struct btrfs_dir_item *item,
1900 struct btrfs_disk_key *key)
1902 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1905 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1906 struct btrfs_dir_item *item,
1907 struct btrfs_disk_key *key)
1909 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1912 /* struct btrfs_free_space_header */
1913 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1915 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1917 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1920 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1921 struct btrfs_free_space_header *h,
1922 struct btrfs_disk_key *key)
1924 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1927 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1928 struct btrfs_free_space_header *h,
1929 struct btrfs_disk_key *key)
1931 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1934 /* struct btrfs_disk_key */
1935 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1937 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1938 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1940 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1941 struct btrfs_disk_key *disk)
1943 cpu->offset = le64_to_cpu(disk->offset);
1944 cpu->type = disk->type;
1945 cpu->objectid = le64_to_cpu(disk->objectid);
1948 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1949 struct btrfs_key *cpu)
1951 disk->offset = cpu_to_le64(cpu->offset);
1952 disk->type = cpu->type;
1953 disk->objectid = cpu_to_le64(cpu->objectid);
1956 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1957 struct btrfs_key *key, int nr)
1959 struct btrfs_disk_key disk_key;
1960 btrfs_node_key(eb, &disk_key, nr);
1961 btrfs_disk_key_to_cpu(key, &disk_key);
1964 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1965 struct btrfs_key *key, int nr)
1967 struct btrfs_disk_key disk_key;
1968 btrfs_item_key(eb, &disk_key, nr);
1969 btrfs_disk_key_to_cpu(key, &disk_key);
1972 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1973 struct btrfs_dir_item *item,
1974 struct btrfs_key *key)
1976 struct btrfs_disk_key disk_key;
1977 btrfs_dir_item_key(eb, item, &disk_key);
1978 btrfs_disk_key_to_cpu(key, &disk_key);
1981 /* struct btrfs_header */
1982 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1983 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1985 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1986 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1987 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1988 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1989 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1990 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1992 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1993 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1996 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1998 return (btrfs_header_flags(eb) & flag) == flag;
2001 static inline int btrfs_set_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_clear_header_flag(struct extent_buffer *eb, u64 flag)
2010 u64 flags = btrfs_header_flags(eb);
2011 btrfs_set_header_flags(eb, flags & ~flag);
2012 return (flags & flag) == flag;
2015 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2017 u64 flags = btrfs_header_flags(eb);
2018 return flags >> BTRFS_BACKREF_REV_SHIFT;
2021 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2024 u64 flags = btrfs_header_flags(eb);
2025 flags &= ~BTRFS_BACKREF_REV_MASK;
2026 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2027 btrfs_set_header_flags(eb, flags);
2030 static inline unsigned long btrfs_header_fsid(void)
2032 return offsetof(struct btrfs_header, fsid);
2035 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2037 return offsetof(struct btrfs_header, chunk_tree_uuid);
2040 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
2042 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
2046 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
2048 unsigned long ptr = offsetof(struct btrfs_header, csum);
2052 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
2057 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
2062 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
2067 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2069 return (btrfs_header_level(eb) == 0);
2072 /* struct btrfs_root_item */
2073 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2075 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2076 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2077 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2079 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2081 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2082 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2083 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2084 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2085 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2086 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2087 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2088 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2090 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2092 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2094 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2096 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2098 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2101 /* struct btrfs_root_backup */
2102 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2104 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2106 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2107 tree_root_level, 8);
2109 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2111 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2112 chunk_root_gen, 64);
2113 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2114 chunk_root_level, 8);
2116 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2118 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2119 extent_root_gen, 64);
2120 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2121 extent_root_level, 8);
2123 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2125 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2127 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2130 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2132 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2134 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2137 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2139 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2141 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2142 csum_root_level, 8);
2143 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2145 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2147 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2150 /* struct btrfs_super_block */
2152 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2153 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2154 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2156 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2157 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2158 struct btrfs_super_block, sys_chunk_array_size, 32);
2159 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2160 struct btrfs_super_block, chunk_root_generation, 64);
2161 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2163 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2165 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2166 chunk_root_level, 8);
2167 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2169 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2170 log_root_transid, 64);
2171 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2173 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2175 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2177 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2179 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2181 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2183 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2185 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2186 root_dir_objectid, 64);
2187 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2189 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2191 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2192 compat_ro_flags, 64);
2193 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2194 incompat_flags, 64);
2195 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2197 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2198 cache_generation, 64);
2199 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2200 uuid_tree_generation, 64);
2201 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2203 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2205 int t = btrfs_super_csum_type(s);
2206 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2207 return btrfs_csum_sizes[t];
2210 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2212 return offsetof(struct btrfs_leaf, items);
2215 /* struct btrfs_file_extent_item */
2216 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2217 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2219 static inline unsigned long btrfs_file_extent_inline_start(struct
2220 btrfs_file_extent_item *e)
2222 unsigned long offset = (unsigned long)e;
2223 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2227 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2229 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2232 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2234 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2236 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2238 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2240 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2241 disk_num_bytes, 64);
2242 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2244 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2246 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2248 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2250 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2252 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2254 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2256 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2258 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2260 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2261 other_encoding, 16);
2263 /* btrfs_qgroup_status_item */
2264 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2266 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2268 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2270 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2273 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2274 struct btrfs_qgroup_status_item, version, 64);
2275 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2276 struct btrfs_qgroup_status_item, generation, 64);
2277 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2278 struct btrfs_qgroup_status_item, flags, 64);
2279 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2280 struct btrfs_qgroup_status_item, rescan, 64);
2282 /* btrfs_qgroup_info_item */
2283 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2285 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2287 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2288 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2289 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2291 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2292 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2294 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2295 struct btrfs_qgroup_info_item, generation, 64);
2296 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2297 struct btrfs_qgroup_info_item, referenced, 64);
2298 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2299 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2300 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2301 struct btrfs_qgroup_info_item, exclusive, 64);
2302 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2303 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2305 /* btrfs_qgroup_limit_item */
2306 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2308 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2309 max_referenced, 64);
2310 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2312 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2313 rsv_referenced, 64);
2314 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2317 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2318 struct btrfs_qgroup_limit_item, flags, 64);
2319 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2320 struct btrfs_qgroup_limit_item, max_referenced, 64);
2321 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2322 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2323 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2324 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2325 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2326 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2328 /* btrfs_balance_item */
2329 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
2331 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
2332 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2334 unsigned long offset = (unsigned long)bi;
2335 struct btrfs_balance_item *p;
2336 p = (struct btrfs_balance_item *)(eb->data + offset);
2340 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
2341 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2343 unsigned long offset = (unsigned long)bi;
2344 struct btrfs_balance_item *p;
2345 p = (struct btrfs_balance_item *)(eb->data + offset);
2349 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
2350 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2352 unsigned long offset = (unsigned long)bi;
2353 struct btrfs_balance_item *p;
2354 p = (struct btrfs_balance_item *)(eb->data + offset);
2359 * btrfs_dev_stats_item helper, returns pointer to the raw array, do the
2360 * endiannes conversion, @dsi is offset to eb data
2362 static inline __le64* btrfs_dev_stats_values(struct extent_buffer *eb,
2363 struct btrfs_dev_stats_item *dsi)
2365 unsigned long offset = (unsigned long)dsi;
2366 struct btrfs_dev_stats_item *p;
2367 p = (struct btrfs_dev_stats_item *)(eb->data + offset);
2372 * this returns the number of bytes used by the item on disk, minus the
2373 * size of any extent headers. If a file is compressed on disk, this is
2374 * the compressed size
2376 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2377 struct btrfs_item *e)
2379 unsigned long offset;
2380 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2381 return btrfs_item_size(eb, e) - offset;
2384 /* struct btrfs_ioctl_search_header */
2385 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2387 return get_unaligned_64(&sh->transid);
2390 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2392 return get_unaligned_64(&sh->objectid);
2395 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2397 return get_unaligned_64(&sh->offset);
2400 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2402 return get_unaligned_32(&sh->type);
2405 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2407 return get_unaligned_32(&sh->len);
2410 /* this returns the number of file bytes represented by the inline item.
2411 * If an item is compressed, this is the uncompressed size
2413 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2415 struct btrfs_file_extent_item *fi)
2418 * return the space used on disk if this item isn't
2419 * compressed or encoded
2421 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2422 btrfs_file_extent_encryption(eb, fi) == 0 &&
2423 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2424 return btrfs_file_extent_inline_item_len(eb,
2425 btrfs_item_nr(slot));
2428 /* otherwise use the ram bytes field */
2429 return btrfs_file_extent_ram_bytes(eb, fi);
2433 * NOTE: Backward compatibility, do not use.
2434 * Replacement: read nodesize directly
2436 __attribute__((deprecated))
2437 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2439 return root->leafsize;
2440 return root->nodesize;
2443 #define btrfs_fs_incompat(fs_info, opt) \
2444 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
2446 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2448 struct btrfs_super_block *disk_super;
2449 disk_super = fs_info->super_copy;
2450 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2453 #define btrfs_fs_compat_ro(fs_info, opt) \
2454 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
2456 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2458 struct btrfs_super_block *disk_super;
2459 disk_super = fs_info->super_copy;
2460 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2463 /* helper function to cast into the data area of the leaf. */
2464 #define btrfs_item_ptr(leaf, slot, type) \
2465 ((type *)(btrfs_leaf_data(leaf) + \
2466 btrfs_item_offset_nr(leaf, slot)))
2468 #define btrfs_item_ptr_offset(leaf, slot) \
2469 ((unsigned long)(btrfs_leaf_data(leaf) + \
2470 btrfs_item_offset_nr(leaf, slot)))
2473 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2474 struct btrfs_root *root,
2475 u64 num_bytes, u64 empty_size,
2476 u64 hint_byte, u64 search_end,
2477 struct btrfs_key *ins, int data);
2478 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2479 struct btrfs_root *root);
2480 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2481 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2482 u64 bytenr, u64 num_bytes);
2483 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2484 struct btrfs_root *root);
2485 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2486 btrfs_fs_info *info,
2488 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2489 btrfs_fs_info *info,
2491 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2492 struct btrfs_root *root,
2493 u32 blocksize, u64 root_objectid,
2494 struct btrfs_disk_key *key, int level,
2495 u64 hint, u64 empty_size);
2496 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2497 struct btrfs_root *root,
2498 u64 num_bytes, u64 parent,
2499 u64 root_objectid, u64 ref_generation,
2500 u64 owner, u64 empty_size, u64 hint_byte,
2501 u64 search_end, struct btrfs_key *ins, int data);
2502 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2503 struct btrfs_root *root, u64 bytenr,
2504 u64 offset, int metadata, u64 *refs, u64 *flags);
2505 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2506 struct btrfs_root *root,
2507 u64 bytenr, int level, u64 flags);
2508 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2509 struct extent_buffer *buf, int record_parent);
2510 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2511 struct extent_buffer *buf, int record_parent);
2512 int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2513 struct btrfs_root *root,
2514 struct extent_buffer *buf,
2515 u64 parent, int last_ref);
2516 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2517 struct btrfs_root *root,
2518 u64 bytenr, u64 num_bytes, u64 parent,
2519 u64 root_objectid, u64 owner, u64 offset);
2520 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2521 struct btrfs_root *root,
2522 struct extent_io_tree *unpin);
2523 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2524 struct btrfs_root *root,
2525 u64 bytenr, u64 num_bytes, u64 parent,
2526 u64 root_objectid, u64 ref_generation,
2527 u64 owner_objectid);
2528 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2529 struct btrfs_root *root, u64 bytenr,
2530 u64 orig_parent, u64 parent,
2531 u64 root_objectid, u64 ref_generation,
2532 u64 owner_objectid);
2533 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2534 struct btrfs_root *root);
2535 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2536 int btrfs_read_block_groups(struct btrfs_root *root);
2537 struct btrfs_block_group_cache *
2538 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2539 u64 chunk_objectid, u64 chunk_offset, u64 size);
2540 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2541 struct btrfs_root *root, u64 bytes_used,
2542 u64 type, u64 chunk_objectid, u64 chunk_offset,
2544 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2545 struct btrfs_root *root);
2546 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2547 struct btrfs_root *root, u64 bytenr, u64 num,
2548 int alloc, int mark_free);
2549 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2550 struct btrfs_root *root, u64 objectid,
2551 struct btrfs_inode_item *inode,
2552 u64 file_pos, u64 disk_bytenr,
2554 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2555 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2556 void free_excluded_extents(struct btrfs_root *root,
2557 struct btrfs_block_group_cache *cache);
2558 int exclude_super_stripes(struct btrfs_root *root,
2559 struct btrfs_block_group_cache *cache);
2560 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2561 struct btrfs_fs_info *info, u64 start, u64 end);
2562 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2565 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2566 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2567 struct btrfs_path *path, int level, int slot);
2568 enum btrfs_tree_block_status
2569 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2570 struct extent_buffer *buf);
2571 enum btrfs_tree_block_status
2572 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2573 struct extent_buffer *buf);
2574 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2575 int level, int slot, u64 objectid);
2576 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2577 struct extent_buffer *parent, int slot);
2578 int btrfs_previous_item(struct btrfs_root *root,
2579 struct btrfs_path *path, u64 min_objectid,
2581 int btrfs_previous_extent_item(struct btrfs_root *root,
2582 struct btrfs_path *path, u64 min_objectid);
2583 int btrfs_next_extent_item(struct btrfs_root *root,
2584 struct btrfs_path *path, u64 max_objectid);
2585 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2586 struct btrfs_root *root, struct extent_buffer *buf,
2587 struct extent_buffer *parent, int parent_slot,
2588 struct extent_buffer **cow_ret);
2589 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2590 struct btrfs_root *root,
2591 struct extent_buffer *buf,
2592 struct extent_buffer *parent, int parent_slot,
2593 struct extent_buffer **cow_ret,
2594 u64 search_start, u64 empty_size);
2595 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2596 struct btrfs_root *root,
2597 struct extent_buffer *buf,
2598 struct extent_buffer **cow_ret, u64 new_root_objectid);
2599 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2600 *root, struct btrfs_path *path, u32 data_size);
2601 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2602 struct btrfs_root *root,
2603 struct btrfs_path *path,
2604 u32 new_size, int from_end);
2605 int btrfs_split_item(struct btrfs_trans_handle *trans,
2606 struct btrfs_root *root,
2607 struct btrfs_path *path,
2608 struct btrfs_key *new_key,
2609 unsigned long split_offset);
2610 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2611 *root, struct btrfs_key *key, struct btrfs_path *p, int
2613 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2614 u64 iobjectid, u64 ioff, u8 key_type,
2615 struct btrfs_key *found_key);
2616 void btrfs_release_path(struct btrfs_path *p);
2617 void add_root_to_dirty_list(struct btrfs_root *root);
2618 struct btrfs_path *btrfs_alloc_path(void);
2619 void btrfs_free_path(struct btrfs_path *p);
2620 void btrfs_init_path(struct btrfs_path *p);
2621 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2622 struct btrfs_path *path, int slot, int nr);
2624 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2625 struct btrfs_root *root,
2626 struct btrfs_path *path)
2628 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2631 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2632 *root, struct btrfs_key *key, void *data, u32 data_size);
2633 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2634 struct btrfs_root *root,
2635 struct btrfs_path *path,
2636 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2638 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2639 struct btrfs_root *root,
2640 struct btrfs_path *path,
2641 struct btrfs_key *key,
2644 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2647 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2648 static inline int btrfs_next_item(struct btrfs_root *root,
2649 struct btrfs_path *p)
2652 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2653 return btrfs_next_leaf(root, p);
2657 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2658 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2659 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2660 struct btrfs_disk_key *key, int level);
2661 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2662 struct btrfs_key *new_key);
2663 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2664 struct btrfs_path *path,
2665 struct btrfs_key *new_key);
2668 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2669 struct btrfs_root *tree_root,
2670 u64 root_id, u8 type, u64 ref_id,
2671 u64 dirid, u64 sequence,
2672 const char *name, int name_len);
2673 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2674 *root, struct btrfs_key *key, struct btrfs_root_item
2676 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2677 struct btrfs_key *key);
2678 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2679 *root, struct btrfs_key *key, struct btrfs_root_item
2681 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2682 btrfs_root_item *item, struct btrfs_key *key);
2684 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2685 *root, const char *name, int name_len, u64 dir,
2686 struct btrfs_key *location, u8 type, u64 index);
2687 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2688 struct btrfs_root *root,
2689 struct btrfs_path *path, u64 dir,
2690 const char *name, int name_len,
2692 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2693 struct btrfs_root *root,
2694 struct btrfs_path *path, u64 dir,
2695 const char *name, int name_len,
2696 u64 index, int mod);
2697 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2698 struct btrfs_root *root,
2699 struct btrfs_path *path,
2700 struct btrfs_dir_item *di);
2701 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2702 struct btrfs_root *root, const char *name,
2703 u16 name_len, const void *data, u16 data_len,
2706 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2707 struct btrfs_root *fs_root,
2708 u64 dirid, u64 *objectid);
2711 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2712 struct btrfs_root *root,
2713 const char *name, int name_len,
2714 u64 inode_objectid, u64 ref_objectid, u64 index);
2715 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2716 *root, u64 objectid, struct btrfs_inode_item
2718 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2719 *root, struct btrfs_path *path,
2720 struct btrfs_key *location, int mod);
2721 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2722 *trans, struct btrfs_path *path, struct btrfs_root *root,
2723 u64 ino, u64 parent_ino, u64 index, const char *name,
2724 int namelen, int ins_len);
2725 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2726 struct btrfs_root *root,
2727 const char *name, int name_len,
2728 u64 inode_objectid, u64 ref_objectid,
2730 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2731 struct btrfs_root *root,
2732 const char *name, int name_len,
2733 u64 inode_objectid, u64 ref_objectid, u64 index);
2734 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2735 struct btrfs_root *root, struct btrfs_path *path,
2736 const char *name, int namelen, u64 ino, u64 parent_ino,
2737 u64 index, int ins_len);
2738 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2739 struct btrfs_root *root, const char *name, int name_len,
2740 u64 ino, u64 parent_ino, u64 *index);
2743 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2744 struct btrfs_root *root, u64 bytenr, u64 len);
2745 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2746 struct btrfs_root *root,
2747 u64 objectid, u64 pos, u64 offset,
2750 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2751 struct btrfs_root *root, u64 objectid,
2752 u64 offset, char *buffer, size_t size);
2753 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2754 struct btrfs_root *root, u64 alloc_end,
2755 u64 bytenr, char *data, size_t len);
2756 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2757 struct btrfs_root *root, struct btrfs_path *path,
2761 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2762 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2765 static inline int is_fstree(u64 rootid)
2767 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2768 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2774 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2775 u64 dir, u64 index);
2776 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2778 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2779 struct btrfs_root *root, u64 ino, u64 flags);
2780 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2781 u64 ino, u64 parent_ino, char *name, int namelen,
2782 u8 type, u64 *index, int add_backref);
2783 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2784 u64 ino, u64 parent_ino, u64 index, const char *name,
2785 int namelen, int add_orphan);
2786 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2787 struct btrfs_root *root, struct btrfs_path *path,
2789 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2790 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2793 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2794 struct btrfs_root *root,
2795 struct btrfs_path *path,
2796 u64 ino, u64 offset, u64 len, int ins_len);
2797 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2798 struct btrfs_root *root,
2799 u64 ino, u64 offset, u64 len);