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)->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->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;
1153 * in ram representation of the tree. extent_root is used for all allocations
1154 * and for the extent tree extent_root root.
1157 struct extent_buffer *node;
1158 struct extent_buffer *commit_root;
1159 struct btrfs_root_item root_item;
1160 struct btrfs_key root_key;
1161 struct btrfs_fs_info *fs_info;
1165 /* data allocations are done in sectorsize units */
1168 /* node allocations are done in nodesize units */
1171 /* leaf allocations are done in nodesize units */
1179 u64 last_inode_alloc;
1182 * Record orphan data extent ref
1184 * TODO: Don't restore things in btrfs_root.
1185 * Directly record it into inode_record, which needs a lot of
1186 * infrastructure change to allow cooperation between extent
1189 struct list_head orphan_data_extents;
1191 /* the dirty list is only used by non-reference counted roots */
1192 struct list_head dirty_list;
1193 struct rb_node rb_node;
1197 * inode items have the data typically returned from stat and store other
1198 * info about object characteristics. There is one for every file and dir in
1201 #define BTRFS_INODE_ITEM_KEY 1
1202 #define BTRFS_INODE_REF_KEY 12
1203 #define BTRFS_INODE_EXTREF_KEY 13
1204 #define BTRFS_XATTR_ITEM_KEY 24
1205 #define BTRFS_ORPHAN_ITEM_KEY 48
1207 #define BTRFS_DIR_LOG_ITEM_KEY 60
1208 #define BTRFS_DIR_LOG_INDEX_KEY 72
1210 * dir items are the name -> inode pointers in a directory. There is one
1211 * for every name in a directory.
1213 #define BTRFS_DIR_ITEM_KEY 84
1214 #define BTRFS_DIR_INDEX_KEY 96
1217 * extent data is for file data
1219 #define BTRFS_EXTENT_DATA_KEY 108
1222 * csum items have the checksums for data in the extents
1224 #define BTRFS_CSUM_ITEM_KEY 120
1226 * extent csums are stored in a separate tree and hold csums for
1227 * an entire extent on disk.
1229 #define BTRFS_EXTENT_CSUM_KEY 128
1232 * root items point to tree roots. There are typically in the root
1233 * tree used by the super block to find all the other trees
1235 #define BTRFS_ROOT_ITEM_KEY 132
1238 * root backrefs tie subvols and snapshots to the directory entries that
1241 #define BTRFS_ROOT_BACKREF_KEY 144
1244 * root refs make a fast index for listing all of the snapshots and
1245 * subvolumes referenced by a given root. They point directly to the
1246 * directory item in the root that references the subvol
1248 #define BTRFS_ROOT_REF_KEY 156
1251 * extent items are in the extent map tree. These record which blocks
1252 * are used, and how many references there are to each block
1254 #define BTRFS_EXTENT_ITEM_KEY 168
1257 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1258 * the length, so we save the level in key->offset instead of the length.
1260 #define BTRFS_METADATA_ITEM_KEY 169
1262 #define BTRFS_TREE_BLOCK_REF_KEY 176
1264 #define BTRFS_EXTENT_DATA_REF_KEY 178
1266 /* old style extent backrefs */
1267 #define BTRFS_EXTENT_REF_V0_KEY 180
1269 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1271 #define BTRFS_SHARED_DATA_REF_KEY 184
1275 * block groups give us hints into the extent allocation trees. Which
1276 * blocks are free etc etc
1278 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1281 * Every block group is represented in the free space tree by a free space info
1282 * item, which stores some accounting information. It is keyed on
1283 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1285 #define BTRFS_FREE_SPACE_INFO_KEY 198
1288 * A free space extent tracks an extent of space that is free in a block group.
1289 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1291 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1294 * When a block group becomes very fragmented, we convert it to use bitmaps
1295 * instead of extents. A free space bitmap is keyed on
1296 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1297 * (length / sectorsize) bits.
1299 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1301 #define BTRFS_DEV_EXTENT_KEY 204
1302 #define BTRFS_DEV_ITEM_KEY 216
1303 #define BTRFS_CHUNK_ITEM_KEY 228
1305 #define BTRFS_BALANCE_ITEM_KEY 248
1310 #define BTRFS_QGROUP_STATUS_KEY 240
1311 #define BTRFS_QGROUP_INFO_KEY 242
1312 #define BTRFS_QGROUP_LIMIT_KEY 244
1313 #define BTRFS_QGROUP_RELATION_KEY 246
1316 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1318 #define BTRFS_BALANCE_ITEM_KEY 248
1321 * The key type for tree items that are stored persistently, but do not need to
1322 * exist for extended period of time. The items can exist in any tree.
1324 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1328 * - balance status item
1329 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1331 #define BTRFS_TEMPORARY_ITEM_KEY 248
1334 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1336 #define BTRFS_DEV_STATS_KEY 249
1339 * The key type for tree items that are stored persistently and usually exist
1340 * for a long period, eg. filesystem lifetime. The item kinds can be status
1341 * information, stats or preference values. The item can exist in any tree.
1343 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1347 * - device statistics, store IO stats in the device tree, one key for all
1349 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1351 #define BTRFS_PERSISTENT_ITEM_KEY 249
1354 * Persistently stores the device replace state in the device tree.
1355 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1357 #define BTRFS_DEV_REPLACE_KEY 250
1360 * Stores items that allow to quickly map UUIDs to something else.
1361 * These items are part of the filesystem UUID tree.
1362 * The key is built like this:
1363 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1365 #if BTRFS_UUID_SIZE != 16
1366 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1368 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1369 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1370 * received subvols */
1373 * string items are for debugging. They just store a short string of
1376 #define BTRFS_STRING_ITEM_KEY 253
1380 #define BTRFS_INODE_NODATASUM (1 << 0)
1381 #define BTRFS_INODE_NODATACOW (1 << 1)
1382 #define BTRFS_INODE_READONLY (1 << 2)
1383 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1384 #define BTRFS_INODE_PREALLOC (1 << 4)
1385 #define BTRFS_INODE_SYNC (1 << 5)
1386 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1387 #define BTRFS_INODE_APPEND (1 << 7)
1388 #define BTRFS_INODE_NODUMP (1 << 8)
1389 #define BTRFS_INODE_NOATIME (1 << 9)
1390 #define BTRFS_INODE_DIRSYNC (1 << 10)
1391 #define BTRFS_INODE_COMPRESS (1 << 11)
1393 #define read_eb_member(eb, ptr, type, member, result) ( \
1394 read_extent_buffer(eb, (char *)(result), \
1395 ((unsigned long)(ptr)) + \
1396 offsetof(type, member), \
1397 sizeof(((type *)0)->member)))
1399 #define write_eb_member(eb, ptr, type, member, result) ( \
1400 write_extent_buffer(eb, (char *)(result), \
1401 ((unsigned long)(ptr)) + \
1402 offsetof(type, member), \
1403 sizeof(((type *)0)->member)))
1405 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1406 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1408 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1409 return le##bits##_to_cpu(h->member); \
1411 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1414 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1415 h->member = cpu_to_le##bits(val); \
1418 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1419 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1422 unsigned long offset = (unsigned long)s; \
1423 const type *p = (type *) (eb->data + offset); \
1424 return get_unaligned_le##bits(&p->member); \
1426 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1427 type *s, u##bits val) \
1429 unsigned long offset = (unsigned long)s; \
1430 type *p = (type *) (eb->data + offset); \
1431 put_unaligned_le##bits(val, &p->member); \
1434 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1435 static inline u##bits btrfs_##name(const type *s) \
1437 return le##bits##_to_cpu(s->member); \
1439 static inline void btrfs_set_##name(type *s, u##bits val) \
1441 s->member = cpu_to_le##bits(val); \
1444 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1445 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1446 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1447 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1448 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1449 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1451 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1452 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1453 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1454 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1455 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1456 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1458 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1459 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1461 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1463 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1465 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1467 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1469 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1470 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1472 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1474 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1476 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1479 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1481 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1484 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1486 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1489 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1490 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1491 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1492 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1493 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1494 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1495 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1496 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1497 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1498 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1499 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1501 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1503 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1506 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1507 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1508 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1510 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1512 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1514 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1516 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1517 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1519 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1521 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1522 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1524 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1527 unsigned long offset = (unsigned long)c;
1528 offset += offsetof(struct btrfs_chunk, stripe);
1529 offset += nr * sizeof(struct btrfs_stripe);
1530 return (struct btrfs_stripe *)offset;
1533 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1535 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1538 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1539 struct btrfs_chunk *c, int nr)
1541 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1544 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1545 struct btrfs_chunk *c, int nr,
1548 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1551 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1552 struct btrfs_chunk *c, int nr)
1554 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1557 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1558 struct btrfs_chunk *c, int nr,
1561 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1564 /* struct btrfs_block_group_item */
1565 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1567 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1569 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1570 struct btrfs_block_group_item, chunk_objectid, 64);
1572 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1573 struct btrfs_block_group_item, chunk_objectid, 64);
1574 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1575 struct btrfs_block_group_item, flags, 64);
1576 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1577 struct btrfs_block_group_item, flags, 64);
1579 /* struct btrfs_free_space_info */
1580 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1582 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1584 /* struct btrfs_inode_ref */
1585 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1586 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1587 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1589 /* struct btrfs_inode_extref */
1590 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1591 parent_objectid, 64);
1592 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1594 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1596 /* struct btrfs_inode_item */
1597 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1598 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1599 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1600 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1601 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1602 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1603 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1604 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1605 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1606 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1607 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1608 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1610 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1611 struct btrfs_inode_item, generation, 64);
1612 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1613 struct btrfs_inode_item, sequence, 64);
1614 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1615 struct btrfs_inode_item, transid, 64);
1616 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1617 struct btrfs_inode_item, size, 64);
1618 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1619 struct btrfs_inode_item, nbytes, 64);
1620 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1621 struct btrfs_inode_item, block_group, 64);
1622 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1623 struct btrfs_inode_item, nlink, 32);
1624 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1625 struct btrfs_inode_item, uid, 32);
1626 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1627 struct btrfs_inode_item, gid, 32);
1628 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1629 struct btrfs_inode_item, mode, 32);
1630 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1631 struct btrfs_inode_item, rdev, 64);
1632 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1633 struct btrfs_inode_item, flags, 64);
1635 static inline struct btrfs_timespec *
1636 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1638 unsigned long ptr = (unsigned long)inode_item;
1639 ptr += offsetof(struct btrfs_inode_item, atime);
1640 return (struct btrfs_timespec *)ptr;
1643 static inline struct btrfs_timespec *
1644 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1646 unsigned long ptr = (unsigned long)inode_item;
1647 ptr += offsetof(struct btrfs_inode_item, mtime);
1648 return (struct btrfs_timespec *)ptr;
1651 static inline struct btrfs_timespec *
1652 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1654 unsigned long ptr = (unsigned long)inode_item;
1655 ptr += offsetof(struct btrfs_inode_item, ctime);
1656 return (struct btrfs_timespec *)ptr;
1659 static inline struct btrfs_timespec *
1660 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1662 unsigned long ptr = (unsigned long)inode_item;
1663 ptr += offsetof(struct btrfs_inode_item, otime);
1664 return (struct btrfs_timespec *)ptr;
1667 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1668 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1669 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1671 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1674 /* struct btrfs_dev_extent */
1675 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1677 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1678 chunk_objectid, 64);
1679 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1681 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1683 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1686 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1688 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1689 return (u8 *)((unsigned long)dev + ptr);
1693 /* struct btrfs_extent_item */
1694 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1695 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1696 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1698 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1699 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1701 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1703 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1705 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1706 struct btrfs_tree_block_info *item,
1707 struct btrfs_disk_key *key)
1709 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1712 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1713 struct btrfs_tree_block_info *item,
1714 struct btrfs_disk_key *key)
1716 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1719 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1721 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1723 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1725 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1728 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1731 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1733 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1735 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1736 struct btrfs_extent_inline_ref, type, 8);
1737 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1738 struct btrfs_extent_inline_ref, offset, 64);
1740 static inline u32 btrfs_extent_inline_ref_size(int type)
1742 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1743 type == BTRFS_SHARED_BLOCK_REF_KEY)
1744 return sizeof(struct btrfs_extent_inline_ref);
1745 if (type == BTRFS_SHARED_DATA_REF_KEY)
1746 return sizeof(struct btrfs_shared_data_ref) +
1747 sizeof(struct btrfs_extent_inline_ref);
1748 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1749 return sizeof(struct btrfs_extent_data_ref) +
1750 offsetof(struct btrfs_extent_inline_ref, offset);
1755 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1756 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1758 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1759 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1761 /* struct btrfs_node */
1762 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1763 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1765 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1768 ptr = offsetof(struct btrfs_node, ptrs) +
1769 sizeof(struct btrfs_key_ptr) * nr;
1770 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1773 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1777 ptr = offsetof(struct btrfs_node, ptrs) +
1778 sizeof(struct btrfs_key_ptr) * nr;
1779 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1782 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1785 ptr = offsetof(struct btrfs_node, ptrs) +
1786 sizeof(struct btrfs_key_ptr) * nr;
1787 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1790 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1794 ptr = offsetof(struct btrfs_node, ptrs) +
1795 sizeof(struct btrfs_key_ptr) * nr;
1796 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1799 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1801 return offsetof(struct btrfs_node, ptrs) +
1802 sizeof(struct btrfs_key_ptr) * nr;
1805 static inline void btrfs_node_key(struct extent_buffer *eb,
1806 struct btrfs_disk_key *disk_key, int nr)
1809 ptr = btrfs_node_key_ptr_offset(nr);
1810 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1811 struct btrfs_key_ptr, key, disk_key);
1814 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1815 struct btrfs_disk_key *disk_key, int nr)
1818 ptr = btrfs_node_key_ptr_offset(nr);
1819 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1820 struct btrfs_key_ptr, key, disk_key);
1823 /* struct btrfs_item */
1824 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1825 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1827 static inline unsigned long btrfs_item_nr_offset(int nr)
1829 return offsetof(struct btrfs_leaf, items) +
1830 sizeof(struct btrfs_item) * nr;
1833 static inline struct btrfs_item *btrfs_item_nr(int nr)
1835 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1838 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1839 struct btrfs_item *item)
1841 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1844 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1846 return btrfs_item_end(eb, btrfs_item_nr(nr));
1849 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1851 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1854 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1856 return btrfs_item_size(eb, btrfs_item_nr(nr));
1859 static inline void btrfs_item_key(struct extent_buffer *eb,
1860 struct btrfs_disk_key *disk_key, int nr)
1862 struct btrfs_item *item = btrfs_item_nr(nr);
1863 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1866 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1867 struct btrfs_disk_key *disk_key, int nr)
1869 struct btrfs_item *item = btrfs_item_nr(nr);
1870 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1873 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1876 * struct btrfs_root_ref
1878 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1879 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1880 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1882 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1883 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1884 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1886 /* struct btrfs_dir_item */
1887 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1888 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1889 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1890 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1892 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1893 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1894 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1895 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1897 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1898 struct btrfs_dir_item *item,
1899 struct btrfs_disk_key *key)
1901 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1904 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1905 struct btrfs_dir_item *item,
1906 struct btrfs_disk_key *key)
1908 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1911 /* struct btrfs_free_space_header */
1912 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1914 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1916 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1919 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1920 struct btrfs_free_space_header *h,
1921 struct btrfs_disk_key *key)
1923 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1926 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1927 struct btrfs_free_space_header *h,
1928 struct btrfs_disk_key *key)
1930 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1933 /* struct btrfs_disk_key */
1934 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1936 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1937 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1939 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1940 struct btrfs_disk_key *disk)
1942 cpu->offset = le64_to_cpu(disk->offset);
1943 cpu->type = disk->type;
1944 cpu->objectid = le64_to_cpu(disk->objectid);
1947 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1948 struct btrfs_key *cpu)
1950 disk->offset = cpu_to_le64(cpu->offset);
1951 disk->type = cpu->type;
1952 disk->objectid = cpu_to_le64(cpu->objectid);
1955 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1956 struct btrfs_key *key, int nr)
1958 struct btrfs_disk_key disk_key;
1959 btrfs_node_key(eb, &disk_key, nr);
1960 btrfs_disk_key_to_cpu(key, &disk_key);
1963 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1964 struct btrfs_key *key, int nr)
1966 struct btrfs_disk_key disk_key;
1967 btrfs_item_key(eb, &disk_key, nr);
1968 btrfs_disk_key_to_cpu(key, &disk_key);
1971 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1972 struct btrfs_dir_item *item,
1973 struct btrfs_key *key)
1975 struct btrfs_disk_key disk_key;
1976 btrfs_dir_item_key(eb, item, &disk_key);
1977 btrfs_disk_key_to_cpu(key, &disk_key);
1980 /* struct btrfs_header */
1981 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1982 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1984 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1985 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1986 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1987 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1988 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1989 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1991 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1992 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1995 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1997 return (btrfs_header_flags(eb) & flag) == flag;
2000 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2002 u64 flags = btrfs_header_flags(eb);
2003 btrfs_set_header_flags(eb, flags | flag);
2004 return (flags & flag) == flag;
2007 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2009 u64 flags = btrfs_header_flags(eb);
2010 btrfs_set_header_flags(eb, flags & ~flag);
2011 return (flags & flag) == flag;
2014 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2016 u64 flags = btrfs_header_flags(eb);
2017 return flags >> BTRFS_BACKREF_REV_SHIFT;
2020 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2023 u64 flags = btrfs_header_flags(eb);
2024 flags &= ~BTRFS_BACKREF_REV_MASK;
2025 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2026 btrfs_set_header_flags(eb, flags);
2029 static inline unsigned long btrfs_header_fsid(void)
2031 return offsetof(struct btrfs_header, fsid);
2034 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2036 return offsetof(struct btrfs_header, chunk_tree_uuid);
2039 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
2041 unsigned long ptr = offsetof(struct btrfs_header, csum);
2045 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2047 return (btrfs_header_level(eb) == 0);
2050 /* struct btrfs_root_item */
2051 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2053 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2054 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2055 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2057 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2059 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2060 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2061 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2062 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2063 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2064 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2065 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2066 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2068 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2070 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2072 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2074 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2076 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2079 /* struct btrfs_root_backup */
2080 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2082 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2084 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2085 tree_root_level, 8);
2087 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2089 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2090 chunk_root_gen, 64);
2091 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2092 chunk_root_level, 8);
2094 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2096 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2097 extent_root_gen, 64);
2098 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2099 extent_root_level, 8);
2101 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2103 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2105 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2108 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2110 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2112 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2115 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2117 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2119 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2120 csum_root_level, 8);
2121 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2123 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2125 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2128 /* struct btrfs_super_block */
2130 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2131 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2132 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2134 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2135 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2136 struct btrfs_super_block, sys_chunk_array_size, 32);
2137 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2138 struct btrfs_super_block, chunk_root_generation, 64);
2139 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2141 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2143 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2144 chunk_root_level, 8);
2145 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2147 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2148 log_root_transid, 64);
2149 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2151 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2153 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2155 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2157 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2159 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2161 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2162 root_dir_objectid, 64);
2163 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2165 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2167 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2168 compat_ro_flags, 64);
2169 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2170 incompat_flags, 64);
2171 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2173 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2174 cache_generation, 64);
2175 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2176 uuid_tree_generation, 64);
2177 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2179 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2181 int t = btrfs_super_csum_type(s);
2182 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2183 return btrfs_csum_sizes[t];
2186 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2188 return offsetof(struct btrfs_leaf, items);
2191 /* struct btrfs_file_extent_item */
2192 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2193 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2195 static inline unsigned long btrfs_file_extent_inline_start(struct
2196 btrfs_file_extent_item *e)
2198 unsigned long offset = (unsigned long)e;
2199 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2203 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2205 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2208 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2210 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2212 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2214 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2216 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2217 disk_num_bytes, 64);
2218 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2220 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2222 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2224 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2226 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2228 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2230 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2232 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2234 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2236 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2237 other_encoding, 16);
2239 /* btrfs_qgroup_status_item */
2240 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2242 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2244 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2246 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2249 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2250 struct btrfs_qgroup_status_item, version, 64);
2251 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2252 struct btrfs_qgroup_status_item, generation, 64);
2253 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2254 struct btrfs_qgroup_status_item, flags, 64);
2255 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2256 struct btrfs_qgroup_status_item, rescan, 64);
2258 /* btrfs_qgroup_info_item */
2259 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2261 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2263 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2264 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2265 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2267 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2268 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2270 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2271 struct btrfs_qgroup_info_item, generation, 64);
2272 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2273 struct btrfs_qgroup_info_item, referenced, 64);
2274 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2275 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2276 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2277 struct btrfs_qgroup_info_item, exclusive, 64);
2278 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2279 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2281 /* btrfs_qgroup_limit_item */
2282 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2284 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2285 max_referenced, 64);
2286 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2288 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2289 rsv_referenced, 64);
2290 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2293 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2294 struct btrfs_qgroup_limit_item, flags, 64);
2295 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2296 struct btrfs_qgroup_limit_item, max_referenced, 64);
2297 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2298 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2299 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2300 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2301 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2302 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2304 /* btrfs_balance_item */
2305 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
2307 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
2308 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2310 unsigned long offset = (unsigned long)bi;
2311 struct btrfs_balance_item *p;
2312 p = (struct btrfs_balance_item *)(eb->data + offset);
2316 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
2317 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2319 unsigned long offset = (unsigned long)bi;
2320 struct btrfs_balance_item *p;
2321 p = (struct btrfs_balance_item *)(eb->data + offset);
2325 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
2326 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2328 unsigned long offset = (unsigned long)bi;
2329 struct btrfs_balance_item *p;
2330 p = (struct btrfs_balance_item *)(eb->data + offset);
2335 * btrfs_dev_stats_item helper, returns pointer to the raw array, do the
2336 * endiannes conversion, @dsi is offset to eb data
2338 static inline __le64* btrfs_dev_stats_values(struct extent_buffer *eb,
2339 struct btrfs_dev_stats_item *dsi)
2341 unsigned long offset = (unsigned long)dsi;
2342 struct btrfs_dev_stats_item *p;
2343 p = (struct btrfs_dev_stats_item *)(eb->data + offset);
2348 * this returns the number of bytes used by the item on disk, minus the
2349 * size of any extent headers. If a file is compressed on disk, this is
2350 * the compressed size
2352 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2353 struct btrfs_item *e)
2355 unsigned long offset;
2356 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2357 return btrfs_item_size(eb, e) - offset;
2360 /* struct btrfs_ioctl_search_header */
2361 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2363 return get_unaligned_64(&sh->transid);
2366 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2368 return get_unaligned_64(&sh->objectid);
2371 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2373 return get_unaligned_64(&sh->offset);
2376 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2378 return get_unaligned_32(&sh->type);
2381 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2383 return get_unaligned_32(&sh->len);
2386 /* this returns the number of file bytes represented by the inline item.
2387 * If an item is compressed, this is the uncompressed size
2389 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2391 struct btrfs_file_extent_item *fi)
2394 * return the space used on disk if this item isn't
2395 * compressed or encoded
2397 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2398 btrfs_file_extent_encryption(eb, fi) == 0 &&
2399 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2400 return btrfs_file_extent_inline_item_len(eb,
2401 btrfs_item_nr(slot));
2404 /* otherwise use the ram bytes field */
2405 return btrfs_file_extent_ram_bytes(eb, fi);
2408 #define btrfs_fs_incompat(fs_info, opt) \
2409 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
2411 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2413 struct btrfs_super_block *disk_super;
2414 disk_super = fs_info->super_copy;
2415 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2418 #define btrfs_fs_compat_ro(fs_info, opt) \
2419 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
2421 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2423 struct btrfs_super_block *disk_super;
2424 disk_super = fs_info->super_copy;
2425 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2428 /* helper function to cast into the data area of the leaf. */
2429 #define btrfs_item_ptr(leaf, slot, type) \
2430 ((type *)(btrfs_leaf_data(leaf) + \
2431 btrfs_item_offset_nr(leaf, slot)))
2433 #define btrfs_item_ptr_offset(leaf, slot) \
2434 ((unsigned long)(btrfs_leaf_data(leaf) + \
2435 btrfs_item_offset_nr(leaf, slot)))
2438 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2439 struct btrfs_root *root,
2440 u64 num_bytes, u64 empty_size,
2441 u64 hint_byte, u64 search_end,
2442 struct btrfs_key *ins, int data);
2443 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2444 struct btrfs_root *root);
2445 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2446 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2447 u64 bytenr, u64 num_bytes);
2448 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2449 struct btrfs_root *root);
2450 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2451 btrfs_fs_info *info,
2453 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2454 btrfs_fs_info *info,
2456 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2457 struct btrfs_root *root,
2458 u32 blocksize, u64 root_objectid,
2459 struct btrfs_disk_key *key, int level,
2460 u64 hint, u64 empty_size);
2461 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2462 struct btrfs_root *root,
2463 u64 num_bytes, u64 parent,
2464 u64 root_objectid, u64 ref_generation,
2465 u64 owner, u64 empty_size, u64 hint_byte,
2466 u64 search_end, struct btrfs_key *ins, int data);
2467 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2468 struct btrfs_root *root, u64 bytenr,
2469 u64 offset, int metadata, u64 *refs, u64 *flags);
2470 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2471 struct btrfs_root *root,
2472 u64 bytenr, int level, u64 flags);
2473 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2474 struct extent_buffer *buf, int record_parent);
2475 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2476 struct extent_buffer *buf, int record_parent);
2477 int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2478 struct btrfs_root *root,
2479 struct extent_buffer *buf,
2480 u64 parent, int last_ref);
2481 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2482 struct btrfs_root *root,
2483 u64 bytenr, u64 num_bytes, u64 parent,
2484 u64 root_objectid, u64 owner, u64 offset);
2485 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2486 struct btrfs_root *root,
2487 struct extent_io_tree *unpin);
2488 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2489 struct btrfs_root *root,
2490 u64 bytenr, u64 num_bytes, u64 parent,
2491 u64 root_objectid, u64 ref_generation,
2492 u64 owner_objectid);
2493 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2494 struct btrfs_root *root, u64 bytenr,
2495 u64 orig_parent, u64 parent,
2496 u64 root_objectid, u64 ref_generation,
2497 u64 owner_objectid);
2498 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2499 struct btrfs_root *root);
2500 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2501 int btrfs_read_block_groups(struct btrfs_root *root);
2502 struct btrfs_block_group_cache *
2503 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2504 u64 chunk_objectid, u64 chunk_offset, u64 size);
2505 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2506 struct btrfs_root *root, u64 bytes_used,
2507 u64 type, u64 chunk_objectid, u64 chunk_offset,
2509 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2510 struct btrfs_root *root);
2511 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2512 struct btrfs_root *root, u64 bytenr, u64 num,
2513 int alloc, int mark_free);
2514 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2515 struct btrfs_root *root, u64 objectid,
2516 struct btrfs_inode_item *inode,
2517 u64 file_pos, u64 disk_bytenr,
2519 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2520 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2521 void free_excluded_extents(struct btrfs_root *root,
2522 struct btrfs_block_group_cache *cache);
2523 int exclude_super_stripes(struct btrfs_root *root,
2524 struct btrfs_block_group_cache *cache);
2525 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2526 struct btrfs_fs_info *info, u64 start, u64 end);
2527 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2530 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2531 int btrfs_del_ptr(struct btrfs_root *root, struct btrfs_path *path,
2532 int level, int slot);
2533 enum btrfs_tree_block_status
2534 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2535 struct extent_buffer *buf);
2536 enum btrfs_tree_block_status
2537 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2538 struct extent_buffer *buf);
2539 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2540 int level, int slot, u64 objectid);
2541 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2542 struct extent_buffer *parent, int slot);
2543 int btrfs_previous_item(struct btrfs_root *root,
2544 struct btrfs_path *path, u64 min_objectid,
2546 int btrfs_previous_extent_item(struct btrfs_root *root,
2547 struct btrfs_path *path, u64 min_objectid);
2548 int btrfs_next_extent_item(struct btrfs_root *root,
2549 struct btrfs_path *path, u64 max_objectid);
2550 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2551 struct btrfs_root *root, struct extent_buffer *buf,
2552 struct extent_buffer *parent, int parent_slot,
2553 struct extent_buffer **cow_ret);
2554 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2555 struct btrfs_root *root,
2556 struct extent_buffer *buf,
2557 struct extent_buffer *parent, int parent_slot,
2558 struct extent_buffer **cow_ret,
2559 u64 search_start, u64 empty_size);
2560 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2561 struct btrfs_root *root,
2562 struct extent_buffer *buf,
2563 struct extent_buffer **cow_ret, u64 new_root_objectid);
2564 int btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
2566 int btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
2567 u32 new_size, int from_end);
2568 int btrfs_split_item(struct btrfs_trans_handle *trans,
2569 struct btrfs_root *root,
2570 struct btrfs_path *path,
2571 struct btrfs_key *new_key,
2572 unsigned long split_offset);
2573 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2574 *root, struct btrfs_key *key, struct btrfs_path *p, int
2576 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2577 u64 iobjectid, u64 ioff, u8 key_type,
2578 struct btrfs_key *found_key);
2579 void btrfs_release_path(struct btrfs_path *p);
2580 void add_root_to_dirty_list(struct btrfs_root *root);
2581 struct btrfs_path *btrfs_alloc_path(void);
2582 void btrfs_free_path(struct btrfs_path *p);
2583 void btrfs_init_path(struct btrfs_path *p);
2584 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2585 struct btrfs_path *path, int slot, int nr);
2587 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2588 struct btrfs_root *root,
2589 struct btrfs_path *path)
2591 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2594 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2595 *root, struct btrfs_key *key, void *data, u32 data_size);
2596 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2597 struct btrfs_root *root,
2598 struct btrfs_path *path,
2599 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2601 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2602 struct btrfs_root *root,
2603 struct btrfs_path *path,
2604 struct btrfs_key *key,
2607 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2610 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2611 static inline int btrfs_next_item(struct btrfs_root *root,
2612 struct btrfs_path *p)
2615 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2616 return btrfs_next_leaf(root, p);
2620 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2621 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2622 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2623 struct btrfs_disk_key *key, int level);
2624 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2625 struct btrfs_key *new_key);
2626 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2627 struct btrfs_path *path,
2628 struct btrfs_key *new_key);
2631 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2632 struct btrfs_root *tree_root,
2633 u64 root_id, u8 type, u64 ref_id,
2634 u64 dirid, u64 sequence,
2635 const char *name, int name_len);
2636 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2637 *root, struct btrfs_key *key, struct btrfs_root_item
2639 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2640 struct btrfs_key *key);
2641 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2642 *root, struct btrfs_key *key, struct btrfs_root_item
2644 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2645 btrfs_root_item *item, struct btrfs_key *key);
2647 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2648 *root, const char *name, int name_len, u64 dir,
2649 struct btrfs_key *location, u8 type, u64 index);
2650 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2651 struct btrfs_root *root,
2652 struct btrfs_path *path, u64 dir,
2653 const char *name, int name_len,
2655 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2656 struct btrfs_root *root,
2657 struct btrfs_path *path, u64 dir,
2658 const char *name, int name_len,
2659 u64 index, int mod);
2660 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2661 struct btrfs_root *root,
2662 struct btrfs_path *path,
2663 struct btrfs_dir_item *di);
2664 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2665 struct btrfs_root *root, const char *name,
2666 u16 name_len, const void *data, u16 data_len,
2669 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2670 struct btrfs_root *fs_root,
2671 u64 dirid, u64 *objectid);
2674 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2675 struct btrfs_root *root,
2676 const char *name, int name_len,
2677 u64 inode_objectid, u64 ref_objectid, u64 index);
2678 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2679 *root, u64 objectid, struct btrfs_inode_item
2681 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2682 *root, struct btrfs_path *path,
2683 struct btrfs_key *location, int mod);
2684 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2685 *trans, struct btrfs_path *path, struct btrfs_root *root,
2686 u64 ino, u64 parent_ino, u64 index, const char *name,
2687 int namelen, int ins_len);
2688 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2689 struct btrfs_root *root,
2690 const char *name, int name_len,
2691 u64 inode_objectid, u64 ref_objectid,
2693 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2694 struct btrfs_root *root,
2695 const char *name, int name_len,
2696 u64 inode_objectid, u64 ref_objectid, u64 index);
2697 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2698 struct btrfs_root *root, struct btrfs_path *path,
2699 const char *name, int namelen, u64 ino, u64 parent_ino,
2701 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2702 struct btrfs_root *root, const char *name, int name_len,
2703 u64 ino, u64 parent_ino, u64 *index);
2706 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2707 struct btrfs_root *root, u64 bytenr, u64 len);
2708 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2709 struct btrfs_root *root,
2710 u64 objectid, u64 pos, u64 offset,
2713 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2714 struct btrfs_root *root, u64 objectid,
2715 u64 offset, char *buffer, size_t size);
2716 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2717 struct btrfs_root *root, u64 alloc_end,
2718 u64 bytenr, char *data, size_t len);
2719 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2720 struct btrfs_root *root, struct btrfs_path *path,
2724 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2725 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2728 static inline int is_fstree(u64 rootid)
2730 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2731 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2737 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2738 u64 dir, u64 index);
2739 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2741 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2742 struct btrfs_root *root, u64 ino, u64 flags);
2743 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2744 u64 ino, u64 parent_ino, char *name, int namelen,
2745 u8 type, u64 *index, int add_backref);
2746 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2747 u64 ino, u64 parent_ino, u64 index, const char *name,
2748 int namelen, int add_orphan);
2749 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2750 struct btrfs_root *root, struct btrfs_path *path,
2752 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2753 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2756 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2757 struct btrfs_root *root,
2758 struct btrfs_path *path,
2759 u64 ino, u64 offset, u64 len, int ins_len);
2760 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2761 struct btrfs_root *root,
2762 u64 ino, u64 offset, u64 len);
2763 int btrfs_read_file(struct btrfs_root *root, u64 ino, u64 start, int len,