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.
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 */
43 #define BTRFS_MAX_LEVEL 8
45 #define BTRFS_COMPAT_EXTENT_TREE_V0
47 /* holds pointers to all of the tree roots */
48 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
50 /* stores information about which extents are in use, and reference counts */
51 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
54 * chunk tree stores translations from logical -> physical block numbering
55 * the super block points to the chunk tree
57 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
60 * stores information about which areas of a given device are in use.
61 * one per device. The tree of tree roots points to the device tree
63 #define BTRFS_DEV_TREE_OBJECTID 4ULL
65 /* one per subvolume, storing files and directories */
66 #define BTRFS_FS_TREE_OBJECTID 5ULL
68 /* directory objectid inside the root tree */
69 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
70 /* holds checksums of all the data extents */
71 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
72 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
74 /* for storing items that use the BTRFS_UUID_KEY* */
75 #define BTRFS_UUID_TREE_OBJECTID 9ULL
77 /* for storing balance parameters in the root tree */
78 #define BTRFS_BALANCE_OBJECTID -4ULL
80 /* oprhan objectid for tracking unlinked/truncated files */
81 #define BTRFS_ORPHAN_OBJECTID -5ULL
83 /* does write ahead logging to speed up fsyncs */
84 #define BTRFS_TREE_LOG_OBJECTID -6ULL
85 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
88 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
89 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
92 * extent checksums all have this objectid
93 * this allows them to share the logging tree
96 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
98 /* For storing free space cache */
99 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
102 * The inode number assigned to the special inode for sotring
105 #define BTRFS_FREE_INO_OBJECTID -12ULL
107 /* dummy objectid represents multiple objectids */
108 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
111 * All files have objectids in this range.
113 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
114 #define BTRFS_LAST_FREE_OBJECTID -256ULL
115 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
120 * the device items go into the chunk tree. The key is in the form
121 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
123 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
126 * the max metadata block size. This limit is somewhat artificial,
127 * but the memmove costs go through the roof for larger blocks.
129 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
132 * we can actually store much bigger names, but lets not confuse the rest
135 #define BTRFS_NAME_LEN 255
138 * Theoretical limit is larger, but we keep this down to a sane
139 * value. That should limit greatly the possibility of collisions on
142 #define BTRFS_LINK_MAX 65535U
144 /* 32 bytes in various csum fields */
145 #define BTRFS_CSUM_SIZE 32
148 #define BTRFS_CSUM_TYPE_CRC32 0
150 static int btrfs_csum_sizes[] = { 4, 0 };
152 /* four bytes for CRC32 */
153 #define BTRFS_CRC32_SIZE 4
154 #define BTRFS_EMPTY_DIR_SIZE 0
156 #define BTRFS_FT_UNKNOWN 0
157 #define BTRFS_FT_REG_FILE 1
158 #define BTRFS_FT_DIR 2
159 #define BTRFS_FT_CHRDEV 3
160 #define BTRFS_FT_BLKDEV 4
161 #define BTRFS_FT_FIFO 5
162 #define BTRFS_FT_SOCK 6
163 #define BTRFS_FT_SYMLINK 7
164 #define BTRFS_FT_XATTR 8
165 #define BTRFS_FT_MAX 9
167 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
170 * the key defines the order in the tree, and so it also defines (optimal)
171 * block layout. objectid corresonds to the inode number. The flags
172 * tells us things about the object, and is a kind of stream selector.
173 * so for a given inode, keys with flags of 1 might refer to the inode
174 * data, flags of 2 may point to file data in the btree and flags == 3
175 * may point to extents.
177 * offset is the starting byte offset for this key in the stream.
179 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
180 * in cpu native order. Otherwise they are identical and their sizes
181 * should be the same (ie both packed)
183 struct btrfs_disk_key {
187 } __attribute__ ((__packed__));
193 } __attribute__ ((__packed__));
195 struct btrfs_mapping_tree {
196 struct cache_tree cache_tree;
199 #define BTRFS_UUID_SIZE 16
200 struct btrfs_dev_item {
201 /* the internal btrfs device id */
204 /* size of the device */
210 /* optimal io alignment for this device */
213 /* optimal io width for this device */
216 /* minimal io size for this device */
219 /* type and info about this device */
222 /* expected generation for this device */
226 * starting byte of this partition on the device,
227 * to allowr for stripe alignment in the future
231 /* grouping information for allocation decisions */
234 /* seek speed 0-100 where 100 is fastest */
237 /* bandwidth 0-100 where 100 is fastest */
240 /* btrfs generated uuid for this device */
241 u8 uuid[BTRFS_UUID_SIZE];
243 /* uuid of FS who owns this device */
244 u8 fsid[BTRFS_UUID_SIZE];
245 } __attribute__ ((__packed__));
247 struct btrfs_stripe {
250 u8 dev_uuid[BTRFS_UUID_SIZE];
251 } __attribute__ ((__packed__));
254 /* size of this chunk in bytes */
257 /* objectid of the root referencing this chunk */
263 /* optimal io alignment for this chunk */
266 /* optimal io width for this chunk */
269 /* minimal io size for this chunk */
272 /* 2^16 stripes is quite a lot, a second limit is the size of a single
277 /* sub stripes only matter for raid10 */
279 struct btrfs_stripe stripe;
280 /* additional stripes go here */
281 } __attribute__ ((__packed__));
283 #define BTRFS_FREE_SPACE_EXTENT 1
284 #define BTRFS_FREE_SPACE_BITMAP 2
286 struct btrfs_free_space_entry {
290 } __attribute__ ((__packed__));
292 struct btrfs_free_space_header {
293 struct btrfs_disk_key location;
297 } __attribute__ ((__packed__));
299 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
301 BUG_ON(num_stripes == 0);
302 return sizeof(struct btrfs_chunk) +
303 sizeof(struct btrfs_stripe) * (num_stripes - 1);
306 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
307 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
308 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
309 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
311 #define BTRFS_BACKREF_REV_MAX 256
312 #define BTRFS_BACKREF_REV_SHIFT 56
313 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
314 BTRFS_BACKREF_REV_SHIFT)
316 #define BTRFS_OLD_BACKREF_REV 0
317 #define BTRFS_MIXED_BACKREF_REV 1
320 * every tree block (leaf or node) starts with this header.
322 struct btrfs_header {
323 /* these first four must match the super block */
324 u8 csum[BTRFS_CSUM_SIZE];
325 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
326 __le64 bytenr; /* which block this node is supposed to live in */
329 /* allowed to be different from the super from here on down */
330 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
335 } __attribute__ ((__packed__));
337 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
338 sizeof(struct btrfs_header)) / \
339 sizeof(struct btrfs_key_ptr))
340 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
341 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
342 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
343 sizeof(struct btrfs_item) - \
344 sizeof(struct btrfs_file_extent_item))
345 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
346 sizeof(struct btrfs_item) -\
347 sizeof(struct btrfs_dir_item))
351 * this is a very generous portion of the super block, giving us
352 * room to translate 14 chunks with 3 stripes each.
354 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
355 #define BTRFS_LABEL_SIZE 256
358 * just in case we somehow lose the roots and are not able to mount,
359 * we store an array of the roots from previous transactions
362 #define BTRFS_NUM_BACKUP_ROOTS 4
363 struct btrfs_root_backup {
365 __le64 tree_root_gen;
368 __le64 chunk_root_gen;
371 __le64 extent_root_gen;
380 __le64 csum_root_gen;
390 u8 extent_root_level;
394 /* future and to align */
396 } __attribute__ ((__packed__));
399 * the super block basically lists the main trees of the FS
400 * it currently lacks any block count etc etc
402 struct btrfs_super_block {
403 u8 csum[BTRFS_CSUM_SIZE];
404 /* the first 3 fields must match struct btrfs_header */
405 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
406 __le64 bytenr; /* this block number */
409 /* allowed to be different from the btrfs_header from here own down */
416 /* this will help find the new super based on the log root */
417 __le64 log_root_transid;
420 __le64 root_dir_objectid;
426 __le32 sys_chunk_array_size;
427 __le64 chunk_root_generation;
429 __le64 compat_ro_flags;
430 __le64 incompat_flags;
435 struct btrfs_dev_item dev_item;
437 char label[BTRFS_LABEL_SIZE];
439 __le64 cache_generation;
440 __le64 uuid_tree_generation;
442 /* future expansion */
444 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
445 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
446 } __attribute__ ((__packed__));
449 * Compat flags that we support. If any incompat flags are set other than the
450 * ones specified below then we will fail to mount
452 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
453 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
454 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
455 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
458 * some patches floated around with a second compression method
459 * lets save that incompat here for when they do get in
460 * Note we don't actually support it, we're just reserving the
463 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
466 * older kernels tried to do bigger metadata blocks, but the
467 * code was pretty buggy. Lets not let them try anymore.
469 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
470 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
471 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
472 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
475 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
476 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
477 #define BTRFS_FEATURE_INCOMPAT_SUPP \
478 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
479 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
480 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
481 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
482 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
483 BTRFS_FEATURE_INCOMPAT_RAID56 | \
484 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
485 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
488 * A leaf is full of items. offset and size tell us where to find
489 * the item in the leaf (relative to the start of the data area)
492 struct btrfs_disk_key key;
495 } __attribute__ ((__packed__));
498 * leaves have an item area and a data area:
499 * [item0, item1....itemN] [free space] [dataN...data1, data0]
501 * The data is separate from the items to get the keys closer together
505 struct btrfs_header header;
506 struct btrfs_item items[];
507 } __attribute__ ((__packed__));
510 * all non-leaf blocks are nodes, they hold only keys and pointers to
513 struct btrfs_key_ptr {
514 struct btrfs_disk_key key;
517 } __attribute__ ((__packed__));
520 struct btrfs_header header;
521 struct btrfs_key_ptr ptrs[];
522 } __attribute__ ((__packed__));
525 * btrfs_paths remember the path taken from the root down to the leaf.
526 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
527 * to any other levels that are present.
529 * The slots array records the index of the item or block pointer
530 * used while walking the tree.
534 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
535 int slots[BTRFS_MAX_LEVEL];
536 /* if there is real range locking, this locks field will change */
537 int locks[BTRFS_MAX_LEVEL];
539 /* keep some upper locks as we walk down */
543 * set by btrfs_split_item, tells search_slot to keep all locks
544 * and to force calls to keep space in the nodes
546 unsigned int search_for_split:1;
547 unsigned int keep_locks:1;
548 unsigned int skip_locking:1;
549 unsigned int leave_spinning:1;
553 * items in the extent btree are used to record the objectid of the
554 * owner of the block and the number of references
557 struct btrfs_extent_item {
561 } __attribute__ ((__packed__));
563 struct btrfs_extent_item_v0 {
565 } __attribute__ ((__packed__));
567 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
568 sizeof(struct btrfs_item))
570 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
571 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
573 /* following flags only apply to tree blocks */
575 /* use full backrefs for extent pointers in the block*/
576 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
578 struct btrfs_tree_block_info {
579 struct btrfs_disk_key key;
581 } __attribute__ ((__packed__));
583 struct btrfs_extent_data_ref {
588 } __attribute__ ((__packed__));
590 struct btrfs_shared_data_ref {
592 } __attribute__ ((__packed__));
594 struct btrfs_extent_inline_ref {
597 } __attribute__ ((__packed__));
599 struct btrfs_extent_ref_v0 {
604 } __attribute__ ((__packed__));
606 /* dev extents record free space on individual devices. The owner
607 * field points back to the chunk allocation mapping tree that allocated
608 * the extent. The chunk tree uuid field is a way to double check the owner
610 struct btrfs_dev_extent {
612 __le64 chunk_objectid;
615 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
616 } __attribute__ ((__packed__));
618 struct btrfs_inode_ref {
622 } __attribute__ ((__packed__));
624 struct btrfs_inode_extref {
625 __le64 parent_objectid;
628 __u8 name[0]; /* name goes here */
629 } __attribute__ ((__packed__));
631 struct btrfs_timespec {
634 } __attribute__ ((__packed__));
637 BTRFS_COMPRESS_NONE = 0,
638 BTRFS_COMPRESS_ZLIB = 1,
639 BTRFS_COMPRESS_LZO = 2,
640 BTRFS_COMPRESS_TYPES = 2,
641 BTRFS_COMPRESS_LAST = 3,
642 } btrfs_compression_type;
644 /* we don't understand any encryption methods right now */
646 BTRFS_ENCRYPTION_NONE = 0,
647 BTRFS_ENCRYPTION_LAST = 1,
648 } btrfs_encryption_type;
650 struct btrfs_inode_item {
651 /* nfs style generation number */
653 /* transid that last touched this inode */
665 /* modification sequence number for NFS */
669 * a little future expansion, for more than this we can
670 * just grow the inode item and version it
673 struct btrfs_timespec atime;
674 struct btrfs_timespec ctime;
675 struct btrfs_timespec mtime;
676 struct btrfs_timespec otime;
677 } __attribute__ ((__packed__));
679 struct btrfs_dir_log_item {
681 } __attribute__ ((__packed__));
683 struct btrfs_dir_item {
684 struct btrfs_disk_key location;
689 } __attribute__ ((__packed__));
691 struct btrfs_root_item_v0 {
692 struct btrfs_inode_item inode;
698 __le64 last_snapshot;
701 struct btrfs_disk_key drop_progress;
704 } __attribute__ ((__packed__));
706 struct btrfs_root_item {
707 struct btrfs_inode_item inode;
713 __le64 last_snapshot;
716 struct btrfs_disk_key drop_progress;
721 * The following fields appear after subvol_uuids+subvol_times
726 * This generation number is used to test if the new fields are valid
727 * and up to date while reading the root item. Everytime the root item
728 * is written out, the "generation" field is copied into this field. If
729 * anyone ever mounted the fs with an older kernel, we will have
730 * mismatching generation values here and thus must invalidate the
731 * new fields. See btrfs_update_root and btrfs_find_last_root for
733 * the offset of generation_v2 is also used as the start for the memset
734 * when invalidating the fields.
736 __le64 generation_v2;
737 u8 uuid[BTRFS_UUID_SIZE];
738 u8 parent_uuid[BTRFS_UUID_SIZE];
739 u8 received_uuid[BTRFS_UUID_SIZE];
740 __le64 ctransid; /* updated when an inode changes */
741 __le64 otransid; /* trans when created */
742 __le64 stransid; /* trans when sent. non-zero for received subvol */
743 __le64 rtransid; /* trans when received. non-zero for received subvol */
744 struct btrfs_timespec ctime;
745 struct btrfs_timespec otime;
746 struct btrfs_timespec stime;
747 struct btrfs_timespec rtime;
748 __le64 reserved[8]; /* for future */
749 } __attribute__ ((__packed__));
752 * this is used for both forward and backward root refs
754 struct btrfs_root_ref {
758 } __attribute__ ((__packed__));
760 #define BTRFS_FILE_EXTENT_INLINE 0
761 #define BTRFS_FILE_EXTENT_REG 1
762 #define BTRFS_FILE_EXTENT_PREALLOC 2
764 struct btrfs_file_extent_item {
766 * transaction id that created this extent
770 * max number of bytes to hold this extent in ram
771 * when we split a compressed extent we can't know how big
772 * each of the resulting pieces will be. So, this is
773 * an upper limit on the size of the extent in ram instead of
779 * 32 bits for the various ways we might encode the data,
780 * including compression and encryption. If any of these
781 * are set to something a given disk format doesn't understand
782 * it is treated like an incompat flag for reading and writing,
787 __le16 other_encoding; /* spare for later use */
789 /* are we inline data or a real extent? */
793 * disk space consumed by the extent, checksum blocks are included
797 __le64 disk_num_bytes;
799 * the logical offset in file blocks (no csums)
800 * this extent record is for. This allows a file extent to point
801 * into the middle of an existing extent on disk, sharing it
802 * between two snapshots (useful if some bytes in the middle of the
803 * extent have changed
807 * the logical number of file blocks (no csums included)
811 } __attribute__ ((__packed__));
813 struct btrfs_csum_item {
815 } __attribute__ ((__packed__));
818 * We don't want to overwrite 1M at the beginning of device, even though
819 * there is our 1st superblock at 64k. Some possible reasons:
820 * - the first 64k blank is useful for some boot loader/manager
821 * - the first 1M could be scratched by buggy partitioner or somesuch
823 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
825 /* tag for the radix tree of block groups in ram */
826 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
827 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
828 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
829 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
830 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
831 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
832 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
833 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
834 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
835 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
837 /* used in struct btrfs_balance_args fields */
838 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
840 #define BTRFS_QGROUP_STATUS_OFF 0
841 #define BTRFS_QGROUP_STATUS_ON 1
842 #define BTRFS_QGROUP_STATUS_SCANNING 2
844 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1 << 0)
846 struct btrfs_qgroup_status_item {
850 __le64 scan; /* progress during scanning */
851 } __attribute__ ((__packed__));
853 struct btrfs_block_group_item {
855 __le64 chunk_objectid;
857 } __attribute__ ((__packed__));
859 struct btrfs_qgroup_info_item {
862 __le64 referenced_compressed;
864 __le64 exclusive_compressed;
865 } __attribute__ ((__packed__));
867 /* flags definition for qgroup limits */
868 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
869 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
870 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
871 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
872 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
873 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
875 struct btrfs_qgroup_limit_item {
877 __le64 max_referenced;
878 __le64 max_exclusive;
879 __le64 rsv_referenced;
880 __le64 rsv_exclusive;
881 } __attribute__ ((__packed__));
883 struct btrfs_space_info {
889 struct list_head list;
892 struct btrfs_block_group_cache {
893 struct cache_extent cache;
894 struct btrfs_key key;
895 struct btrfs_block_group_item item;
896 struct btrfs_space_info *space_info;
897 struct btrfs_free_space_ctl *free_space_ctl;
904 struct btrfs_extent_ops {
905 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
906 u64 hint_byte, struct btrfs_key *ins);
907 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
912 struct btrfs_fs_devices;
913 struct btrfs_fs_info {
914 u8 fsid[BTRFS_FSID_SIZE];
915 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
916 struct btrfs_root *fs_root;
917 struct btrfs_root *extent_root;
918 struct btrfs_root *tree_root;
919 struct btrfs_root *chunk_root;
920 struct btrfs_root *dev_root;
921 struct btrfs_root *csum_root;
923 struct rb_root fs_root_tree;
925 /* the log root tree is a directory of all the other log roots */
926 struct btrfs_root *log_root_tree;
928 struct extent_io_tree extent_cache;
929 struct extent_io_tree free_space_cache;
930 struct extent_io_tree block_group_cache;
931 struct extent_io_tree pinned_extents;
932 struct extent_io_tree pending_del;
933 struct extent_io_tree extent_ins;
935 /* logical->physical extent mapping */
936 struct btrfs_mapping_tree mapping_tree;
939 u64 last_trans_committed;
941 u64 avail_data_alloc_bits;
942 u64 avail_metadata_alloc_bits;
943 u64 avail_system_alloc_bits;
944 u64 data_alloc_profile;
945 u64 metadata_alloc_profile;
946 u64 system_alloc_profile;
949 struct btrfs_trans_handle *running_transaction;
950 struct btrfs_super_block *super_copy;
951 struct mutex fs_mutex;
956 struct btrfs_extent_ops *extent_ops;
957 struct list_head dirty_cowonly_roots;
959 struct btrfs_fs_devices *fs_devices;
960 struct list_head space_info;
964 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
965 struct btrfs_root *root,
966 u64 bytenr, u64 num_bytes, u64 parent,
967 u64 root_objectid, u64 owner, u64 offset,
969 struct cache_tree *fsck_extent_cache;
970 struct cache_tree *corrupt_blocks;
974 * in ram representation of the tree. extent_root is used for all allocations
975 * and for the extent tree extent_root root.
978 struct extent_buffer *node;
979 struct extent_buffer *commit_root;
980 struct btrfs_root_item root_item;
981 struct btrfs_key root_key;
982 struct btrfs_fs_info *fs_info;
986 /* data allocations are done in sectorsize units */
989 /* node allocations are done in nodesize units */
992 /* leaf allocations are done in leafsize units */
995 /* leaf allocations are done in leafsize units */
1004 u64 last_inode_alloc;
1006 /* the dirty list is only used by non-reference counted roots */
1007 struct list_head dirty_list;
1008 struct rb_node rb_node;
1012 * inode items have the data typically returned from stat and store other
1013 * info about object characteristics. There is one for every file and dir in
1016 #define BTRFS_INODE_ITEM_KEY 1
1017 #define BTRFS_INODE_REF_KEY 12
1018 #define BTRFS_INODE_EXTREF_KEY 13
1019 #define BTRFS_XATTR_ITEM_KEY 24
1020 #define BTRFS_ORPHAN_ITEM_KEY 48
1022 #define BTRFS_DIR_LOG_ITEM_KEY 60
1023 #define BTRFS_DIR_LOG_INDEX_KEY 72
1025 * dir items are the name -> inode pointers in a directory. There is one
1026 * for every name in a directory.
1028 #define BTRFS_DIR_ITEM_KEY 84
1029 #define BTRFS_DIR_INDEX_KEY 96
1032 * extent data is for file data
1034 #define BTRFS_EXTENT_DATA_KEY 108
1037 * csum items have the checksums for data in the extents
1039 #define BTRFS_CSUM_ITEM_KEY 120
1041 * extent csums are stored in a separate tree and hold csums for
1042 * an entire extent on disk.
1044 #define BTRFS_EXTENT_CSUM_KEY 128
1047 * root items point to tree roots. There are typically in the root
1048 * tree used by the super block to find all the other trees
1050 #define BTRFS_ROOT_ITEM_KEY 132
1053 * root backrefs tie subvols and snapshots to the directory entries that
1056 #define BTRFS_ROOT_BACKREF_KEY 144
1059 * root refs make a fast index for listing all of the snapshots and
1060 * subvolumes referenced by a given root. They point directly to the
1061 * directory item in the root that references the subvol
1063 #define BTRFS_ROOT_REF_KEY 156
1066 * extent items are in the extent map tree. These record which blocks
1067 * are used, and how many references there are to each block
1069 #define BTRFS_EXTENT_ITEM_KEY 168
1072 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1073 * the length, so we save the level in key->offset instead of the length.
1075 #define BTRFS_METADATA_ITEM_KEY 169
1077 #define BTRFS_TREE_BLOCK_REF_KEY 176
1079 #define BTRFS_EXTENT_DATA_REF_KEY 178
1081 /* old style extent backrefs */
1082 #define BTRFS_EXTENT_REF_V0_KEY 180
1084 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1086 #define BTRFS_SHARED_DATA_REF_KEY 184
1090 * block groups give us hints into the extent allocation trees. Which
1091 * blocks are free etc etc
1093 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1095 #define BTRFS_DEV_EXTENT_KEY 204
1096 #define BTRFS_DEV_ITEM_KEY 216
1097 #define BTRFS_CHUNK_ITEM_KEY 228
1099 #define BTRFS_BALANCE_ITEM_KEY 248
1104 #define BTRFS_QGROUP_STATUS_KEY 240
1105 #define BTRFS_QGROUP_INFO_KEY 242
1106 #define BTRFS_QGROUP_LIMIT_KEY 244
1107 #define BTRFS_QGROUP_RELATION_KEY 246
1110 * Persistently stores the io stats in the device tree.
1111 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1113 #define BTRFS_DEV_STATS_KEY 249
1116 * Persistently stores the device replace state in the device tree.
1117 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1119 #define BTRFS_DEV_REPLACE_KEY 250
1122 * Stores items that allow to quickly map UUIDs to something else.
1123 * These items are part of the filesystem UUID tree.
1124 * The key is built like this:
1125 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1127 #if BTRFS_UUID_SIZE != 16
1128 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1130 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1131 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1132 * received subvols */
1135 * string items are for debugging. They just store a short string of
1138 #define BTRFS_STRING_ITEM_KEY 253
1142 #define BTRFS_INODE_NODATASUM (1 << 0)
1143 #define BTRFS_INODE_NODATACOW (1 << 1)
1144 #define BTRFS_INODE_READONLY (1 << 2)
1146 #define read_eb_member(eb, ptr, type, member, result) ( \
1147 read_extent_buffer(eb, (char *)(result), \
1148 ((unsigned long)(ptr)) + \
1149 offsetof(type, member), \
1150 sizeof(((type *)0)->member)))
1152 #define write_eb_member(eb, ptr, type, member, result) ( \
1153 write_extent_buffer(eb, (char *)(result), \
1154 ((unsigned long)(ptr)) + \
1155 offsetof(type, member), \
1156 sizeof(((type *)0)->member)))
1158 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1159 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1161 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1162 return le##bits##_to_cpu(h->member); \
1164 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1167 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1168 h->member = cpu_to_le##bits(val); \
1171 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1172 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
1175 unsigned long offset = (unsigned long)s; \
1176 type *p = (type *) (eb->data + offset); \
1177 return get_unaligned_le##bits(&p->member); \
1179 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1180 type *s, u##bits val) \
1182 unsigned long offset = (unsigned long)s; \
1183 type *p = (type *) (eb->data + offset); \
1184 put_unaligned_le##bits(val, &p->member); \
1187 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1188 static inline u##bits btrfs_##name(type *s) \
1190 return le##bits##_to_cpu(s->member); \
1192 static inline void btrfs_set_##name(type *s, u##bits val) \
1194 s->member = cpu_to_le##bits(val); \
1197 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1198 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1199 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1200 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1201 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1202 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1204 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1205 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1206 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1207 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1208 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1209 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1211 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1212 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1214 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1216 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1218 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1220 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1222 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1223 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1225 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1227 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1229 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1232 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1234 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1237 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1239 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1242 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1243 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1244 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1245 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1246 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1247 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1248 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1249 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1250 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1251 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1252 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1254 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1256 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1259 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1260 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1261 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1263 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1265 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1267 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1269 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1270 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1272 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1274 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1275 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1277 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1280 unsigned long offset = (unsigned long)c;
1281 offset += offsetof(struct btrfs_chunk, stripe);
1282 offset += nr * sizeof(struct btrfs_stripe);
1283 return (struct btrfs_stripe *)offset;
1286 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1288 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1291 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1292 struct btrfs_chunk *c, int nr)
1294 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1297 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1298 struct btrfs_chunk *c, int nr,
1301 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1304 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1305 struct btrfs_chunk *c, int nr)
1307 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1310 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1311 struct btrfs_chunk *c, int nr,
1314 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1317 /* struct btrfs_block_group_item */
1318 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1320 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1322 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1323 struct btrfs_block_group_item, chunk_objectid, 64);
1325 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1326 struct btrfs_block_group_item, chunk_objectid, 64);
1327 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1328 struct btrfs_block_group_item, flags, 64);
1329 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1330 struct btrfs_block_group_item, flags, 64);
1332 /* struct btrfs_inode_ref */
1333 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1334 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1335 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1337 /* struct btrfs_inode_extref */
1338 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1339 parent_objectid, 64);
1340 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1342 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1344 /* struct btrfs_inode_item */
1345 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1346 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1347 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1348 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1349 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1350 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1351 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1352 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1353 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1354 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1355 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1356 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1358 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1359 struct btrfs_inode_item, generation, 64);
1360 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1361 struct btrfs_inode_item, generation, 64);
1362 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1363 struct btrfs_inode_item, size, 64);
1364 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1365 struct btrfs_inode_item, nbytes, 64);
1366 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1367 struct btrfs_inode_item, block_group, 64);
1368 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1369 struct btrfs_inode_item, nlink, 32);
1370 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1371 struct btrfs_inode_item, uid, 32);
1372 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1373 struct btrfs_inode_item, gid, 32);
1374 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1375 struct btrfs_inode_item, mode, 32);
1376 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1377 struct btrfs_inode_item, rdev, 64);
1378 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1379 struct btrfs_inode_item, flags, 64);
1381 static inline struct btrfs_timespec *
1382 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1384 unsigned long ptr = (unsigned long)inode_item;
1385 ptr += offsetof(struct btrfs_inode_item, atime);
1386 return (struct btrfs_timespec *)ptr;
1389 static inline struct btrfs_timespec *
1390 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1392 unsigned long ptr = (unsigned long)inode_item;
1393 ptr += offsetof(struct btrfs_inode_item, mtime);
1394 return (struct btrfs_timespec *)ptr;
1397 static inline struct btrfs_timespec *
1398 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1400 unsigned long ptr = (unsigned long)inode_item;
1401 ptr += offsetof(struct btrfs_inode_item, ctime);
1402 return (struct btrfs_timespec *)ptr;
1405 static inline struct btrfs_timespec *
1406 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1408 unsigned long ptr = (unsigned long)inode_item;
1409 ptr += offsetof(struct btrfs_inode_item, otime);
1410 return (struct btrfs_timespec *)ptr;
1413 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1414 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1415 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1417 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1420 /* struct btrfs_dev_extent */
1421 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1423 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1424 chunk_objectid, 64);
1425 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1427 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1429 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1431 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1432 return (u8 *)((unsigned long)dev + ptr);
1436 /* struct btrfs_extent_item */
1437 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1438 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1439 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1441 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1442 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1444 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1446 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1448 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1449 struct btrfs_tree_block_info *item,
1450 struct btrfs_disk_key *key)
1452 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1455 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1456 struct btrfs_tree_block_info *item,
1457 struct btrfs_disk_key *key)
1459 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1462 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1464 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1466 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1468 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1471 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1474 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1476 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1478 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1479 struct btrfs_extent_inline_ref, type, 8);
1480 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1481 struct btrfs_extent_inline_ref, offset, 64);
1483 static inline u32 btrfs_extent_inline_ref_size(int type)
1485 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1486 type == BTRFS_SHARED_BLOCK_REF_KEY)
1487 return sizeof(struct btrfs_extent_inline_ref);
1488 if (type == BTRFS_SHARED_DATA_REF_KEY)
1489 return sizeof(struct btrfs_shared_data_ref) +
1490 sizeof(struct btrfs_extent_inline_ref);
1491 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1492 return sizeof(struct btrfs_extent_data_ref) +
1493 offsetof(struct btrfs_extent_inline_ref, offset);
1498 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1499 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1501 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1502 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1504 /* struct btrfs_node */
1505 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1506 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1508 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1511 ptr = offsetof(struct btrfs_node, ptrs) +
1512 sizeof(struct btrfs_key_ptr) * nr;
1513 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1516 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1520 ptr = offsetof(struct btrfs_node, ptrs) +
1521 sizeof(struct btrfs_key_ptr) * nr;
1522 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1525 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1528 ptr = offsetof(struct btrfs_node, ptrs) +
1529 sizeof(struct btrfs_key_ptr) * nr;
1530 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1533 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1537 ptr = offsetof(struct btrfs_node, ptrs) +
1538 sizeof(struct btrfs_key_ptr) * nr;
1539 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1542 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1544 return offsetof(struct btrfs_node, ptrs) +
1545 sizeof(struct btrfs_key_ptr) * nr;
1548 static inline void btrfs_node_key(struct extent_buffer *eb,
1549 struct btrfs_disk_key *disk_key, int nr)
1552 ptr = btrfs_node_key_ptr_offset(nr);
1553 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1554 struct btrfs_key_ptr, key, disk_key);
1557 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1558 struct btrfs_disk_key *disk_key, int nr)
1561 ptr = btrfs_node_key_ptr_offset(nr);
1562 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1563 struct btrfs_key_ptr, key, disk_key);
1566 /* struct btrfs_item */
1567 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1568 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1570 static inline unsigned long btrfs_item_nr_offset(int nr)
1572 return offsetof(struct btrfs_leaf, items) +
1573 sizeof(struct btrfs_item) * nr;
1576 static inline struct btrfs_item *btrfs_item_nr(int nr)
1578 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1581 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1582 struct btrfs_item *item)
1584 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1587 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1589 return btrfs_item_end(eb, btrfs_item_nr(nr));
1592 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1594 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1597 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1599 return btrfs_item_size(eb, btrfs_item_nr(nr));
1602 static inline void btrfs_item_key(struct extent_buffer *eb,
1603 struct btrfs_disk_key *disk_key, int nr)
1605 struct btrfs_item *item = btrfs_item_nr(nr);
1606 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1609 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1610 struct btrfs_disk_key *disk_key, int nr)
1612 struct btrfs_item *item = btrfs_item_nr(nr);
1613 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1616 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1619 * struct btrfs_root_ref
1621 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1622 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1623 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1625 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1626 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1627 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1629 /* struct btrfs_dir_item */
1630 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1631 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1632 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1633 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1635 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1637 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1638 struct btrfs_dir_item *item,
1639 struct btrfs_disk_key *key)
1641 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1644 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1645 struct btrfs_dir_item *item,
1646 struct btrfs_disk_key *key)
1648 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1651 /* struct btrfs_free_space_header */
1652 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1654 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1656 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1659 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1660 struct btrfs_free_space_header *h,
1661 struct btrfs_disk_key *key)
1663 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1666 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1667 struct btrfs_free_space_header *h,
1668 struct btrfs_disk_key *key)
1670 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1673 /* struct btrfs_disk_key */
1674 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1676 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1677 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1679 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1680 struct btrfs_disk_key *disk)
1682 cpu->offset = le64_to_cpu(disk->offset);
1683 cpu->type = disk->type;
1684 cpu->objectid = le64_to_cpu(disk->objectid);
1687 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1688 struct btrfs_key *cpu)
1690 disk->offset = cpu_to_le64(cpu->offset);
1691 disk->type = cpu->type;
1692 disk->objectid = cpu_to_le64(cpu->objectid);
1695 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1696 struct btrfs_key *key, int nr)
1698 struct btrfs_disk_key disk_key;
1699 btrfs_node_key(eb, &disk_key, nr);
1700 btrfs_disk_key_to_cpu(key, &disk_key);
1703 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1704 struct btrfs_key *key, int nr)
1706 struct btrfs_disk_key disk_key;
1707 btrfs_item_key(eb, &disk_key, nr);
1708 btrfs_disk_key_to_cpu(key, &disk_key);
1711 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1712 struct btrfs_dir_item *item,
1713 struct btrfs_key *key)
1715 struct btrfs_disk_key disk_key;
1716 btrfs_dir_item_key(eb, item, &disk_key);
1717 btrfs_disk_key_to_cpu(key, &disk_key);
1721 static inline u8 btrfs_key_type(struct btrfs_key *key)
1726 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1731 /* struct btrfs_header */
1732 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1733 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1735 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1736 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1737 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1738 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1739 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1740 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1742 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1743 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1746 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1748 return (btrfs_header_flags(eb) & flag) == flag;
1751 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1753 u64 flags = btrfs_header_flags(eb);
1754 btrfs_set_header_flags(eb, flags | flag);
1755 return (flags & flag) == flag;
1758 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1760 u64 flags = btrfs_header_flags(eb);
1761 btrfs_set_header_flags(eb, flags & ~flag);
1762 return (flags & flag) == flag;
1765 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1767 u64 flags = btrfs_header_flags(eb);
1768 return flags >> BTRFS_BACKREF_REV_SHIFT;
1771 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1774 u64 flags = btrfs_header_flags(eb);
1775 flags &= ~BTRFS_BACKREF_REV_MASK;
1776 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1777 btrfs_set_header_flags(eb, flags);
1780 static inline u8 *btrfs_header_fsid(void)
1782 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1786 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1788 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1792 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1794 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1798 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1800 unsigned long ptr = offsetof(struct btrfs_header, csum);
1804 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1809 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1814 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1819 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1821 return (btrfs_header_level(eb) == 0);
1824 /* struct btrfs_root_item */
1825 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1827 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1828 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1829 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1831 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1833 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1834 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1835 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1836 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1837 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1838 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1839 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1840 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1842 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1844 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1846 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1848 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1850 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1853 /* struct btrfs_root_backup */
1854 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1856 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1858 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1859 tree_root_level, 8);
1861 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1863 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1864 chunk_root_gen, 64);
1865 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1866 chunk_root_level, 8);
1868 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1870 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1871 extent_root_gen, 64);
1872 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1873 extent_root_level, 8);
1875 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1877 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1879 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1882 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1884 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1886 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1889 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1891 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1893 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1894 csum_root_level, 8);
1895 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1897 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1899 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1902 /* struct btrfs_super_block */
1904 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1905 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1906 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1908 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1909 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1910 struct btrfs_super_block, sys_chunk_array_size, 32);
1911 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1912 struct btrfs_super_block, chunk_root_generation, 64);
1913 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1915 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1917 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1918 chunk_root_level, 8);
1919 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1921 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1922 log_root_transid, 64);
1923 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1925 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1927 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1929 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1931 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1933 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1935 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1937 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1938 root_dir_objectid, 64);
1939 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1941 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1943 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1944 compat_ro_flags, 64);
1945 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1946 incompat_flags, 64);
1947 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1949 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1950 cache_generation, 64);
1951 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
1952 uuid_tree_generation, 64);
1953 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
1955 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1957 int t = btrfs_super_csum_type(s);
1958 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1959 return btrfs_csum_sizes[t];
1962 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1964 return offsetof(struct btrfs_leaf, items);
1967 /* struct btrfs_file_extent_item */
1968 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1969 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
1971 static inline unsigned long btrfs_file_extent_inline_start(struct
1972 btrfs_file_extent_item *e)
1974 unsigned long offset = (unsigned long)e;
1975 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1979 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1981 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1984 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1986 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
1988 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1990 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
1992 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1993 disk_num_bytes, 64);
1994 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1996 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
1998 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2000 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2002 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2004 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2006 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2008 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2010 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2012 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2013 other_encoding, 16);
2015 /* btrfs_qgroup_status_item */
2016 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2018 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2020 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2022 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2025 /* btrfs_qgroup_info_item */
2026 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2028 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2030 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2031 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2032 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2034 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2035 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2037 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2038 struct btrfs_qgroup_info_item, generation, 64);
2039 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2040 struct btrfs_qgroup_info_item, referenced, 64);
2041 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2042 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2043 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2044 struct btrfs_qgroup_info_item, exclusive, 64);
2045 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2046 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2048 /* btrfs_qgroup_limit_item */
2049 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2051 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2052 max_referenced, 64);
2053 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2055 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2056 rsv_referenced, 64);
2057 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2060 /* this returns the number of file bytes represented by the inline item.
2061 * If an item is compressed, this is the uncompressed size
2063 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2064 struct btrfs_file_extent_item *e)
2066 return btrfs_file_extent_ram_bytes(eb, e);
2070 * this returns the number of bytes used by the item on disk, minus the
2071 * size of any extent headers. If a file is compressed on disk, this is
2072 * the compressed size
2074 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2075 struct btrfs_item *e)
2077 unsigned long offset;
2078 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2079 return btrfs_item_size(eb, e) - offset;
2082 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2084 return root->leafsize;
2085 return root->nodesize;
2088 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2090 struct btrfs_super_block *disk_super;
2091 disk_super = fs_info->super_copy;
2092 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2095 /* helper function to cast into the data area of the leaf. */
2096 #define btrfs_item_ptr(leaf, slot, type) \
2097 ((type *)(btrfs_leaf_data(leaf) + \
2098 btrfs_item_offset_nr(leaf, slot)))
2100 #define btrfs_item_ptr_offset(leaf, slot) \
2101 ((unsigned long)(btrfs_leaf_data(leaf) + \
2102 btrfs_item_offset_nr(leaf, slot)))
2105 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2106 struct btrfs_root *root);
2107 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2108 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2109 u64 bytenr, u64 num_bytes);
2110 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2111 struct btrfs_root *root);
2112 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2113 btrfs_fs_info *info,
2115 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2116 btrfs_fs_info *info,
2118 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2119 struct btrfs_root *root,
2120 u32 blocksize, u64 root_objectid,
2121 struct btrfs_disk_key *key, int level,
2122 u64 hint, u64 empty_size);
2123 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2124 struct btrfs_root *root,
2125 u64 num_bytes, u64 parent,
2126 u64 root_objectid, u64 ref_generation,
2127 u64 owner, u64 empty_size, u64 hint_byte,
2128 u64 search_end, struct btrfs_key *ins, int data);
2129 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2130 struct btrfs_root *root, u64 bytenr,
2131 u64 offset, int metadata, u64 *refs, u64 *flags);
2132 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2133 struct btrfs_root *root,
2134 u64 bytenr, int level, u64 flags);
2135 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2136 struct extent_buffer *buf, int record_parent);
2137 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2138 struct extent_buffer *buf, int record_parent);
2139 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2140 struct btrfs_root *root,
2141 u64 bytenr, u64 num_bytes, u64 parent,
2142 u64 root_objectid, u64 owner, u64 offset);
2143 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2144 struct btrfs_root *root,
2145 struct extent_io_tree *unpin);
2146 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2147 struct btrfs_root *root,
2148 u64 bytenr, u64 num_bytes, u64 parent,
2149 u64 root_objectid, u64 ref_generation,
2150 u64 owner_objectid);
2151 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2152 struct btrfs_root *root, u64 bytenr,
2153 u64 orig_parent, u64 parent,
2154 u64 root_objectid, u64 ref_generation,
2155 u64 owner_objectid);
2156 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2157 struct btrfs_root *root);
2158 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2159 int btrfs_read_block_groups(struct btrfs_root *root);
2160 struct btrfs_block_group_cache *
2161 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2162 u64 chunk_objectid, u64 chunk_offset, u64 size);
2163 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2164 struct btrfs_root *root, u64 bytes_used,
2165 u64 type, u64 chunk_objectid, u64 chunk_offset,
2167 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2168 struct btrfs_root *root);
2169 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2170 struct btrfs_root *root, u64 bytenr, u64 num,
2171 int alloc, int mark_free);
2173 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2174 struct btrfs_path *path, int level, int slot);
2175 int btrfs_check_node(struct btrfs_root *root,
2176 struct btrfs_disk_key *parent_key,
2177 struct extent_buffer *buf);
2178 int btrfs_check_leaf(struct btrfs_root *root,
2179 struct btrfs_disk_key *parent_key,
2180 struct extent_buffer *buf);
2181 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2182 int level, int slot, u64 objectid);
2183 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2184 struct extent_buffer *parent, int slot);
2185 int btrfs_previous_item(struct btrfs_root *root,
2186 struct btrfs_path *path, u64 min_objectid,
2188 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2189 struct btrfs_root *root, struct extent_buffer *buf,
2190 struct extent_buffer *parent, int parent_slot,
2191 struct extent_buffer **cow_ret);
2192 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2193 struct btrfs_root *root,
2194 struct extent_buffer *buf,
2195 struct extent_buffer *parent, int parent_slot,
2196 struct extent_buffer **cow_ret,
2197 u64 search_start, u64 empty_size);
2198 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2199 struct btrfs_root *root,
2200 struct extent_buffer *buf,
2201 struct extent_buffer **cow_ret, u64 new_root_objectid);
2202 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2203 *root, struct btrfs_path *path, u32 data_size);
2204 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2205 struct btrfs_root *root,
2206 struct btrfs_path *path,
2207 u32 new_size, int from_end);
2208 int btrfs_split_item(struct btrfs_trans_handle *trans,
2209 struct btrfs_root *root,
2210 struct btrfs_path *path,
2211 struct btrfs_key *new_key,
2212 unsigned long split_offset);
2213 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2214 *root, struct btrfs_key *key, struct btrfs_path *p, int
2216 void btrfs_release_path(struct btrfs_path *p);
2217 void add_root_to_dirty_list(struct btrfs_root *root);
2218 struct btrfs_path *btrfs_alloc_path(void);
2219 void btrfs_free_path(struct btrfs_path *p);
2220 void btrfs_init_path(struct btrfs_path *p);
2221 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2222 struct btrfs_path *path, int slot, int nr);
2224 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2225 struct btrfs_root *root,
2226 struct btrfs_path *path)
2228 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2231 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2232 *root, struct btrfs_key *key, void *data, u32 data_size);
2233 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2234 struct btrfs_root *root,
2235 struct btrfs_path *path,
2236 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2238 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2239 struct btrfs_root *root,
2240 struct btrfs_path *path,
2241 struct btrfs_key *key,
2244 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2247 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2248 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2249 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2250 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2251 struct btrfs_root *root, struct btrfs_path *path,
2252 struct btrfs_key *new_key);
2255 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2256 struct btrfs_root *tree_root,
2257 u64 root_id, u8 type, u64 ref_id,
2258 u64 dirid, u64 sequence,
2259 const char *name, int name_len);
2260 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2261 *root, struct btrfs_key *key, struct btrfs_root_item
2263 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2264 *root, struct btrfs_key *key, struct btrfs_root_item
2266 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2267 btrfs_root_item *item, struct btrfs_key *key);
2269 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2270 *root, const char *name, int name_len, u64 dir,
2271 struct btrfs_key *location, u8 type, u64 index);
2272 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2273 struct btrfs_root *root,
2274 struct btrfs_path *path, u64 dir,
2275 const char *name, int name_len,
2277 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2278 struct btrfs_root *root, const char *name,
2279 u16 name_len, const void *data, u16 data_len,
2282 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2283 struct btrfs_root *fs_root,
2284 u64 dirid, u64 *objectid);
2287 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2288 struct btrfs_root *root,
2289 const char *name, int name_len,
2290 u64 inode_objectid, u64 ref_objectid, u64 index);
2291 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2292 *root, u64 objectid, struct btrfs_inode_item
2294 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2295 *root, struct btrfs_path *path,
2296 struct btrfs_key *location, int mod);
2299 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2300 struct btrfs_root *root, u64 bytenr, u64 len);
2301 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2302 struct btrfs_root *root,
2303 u64 objectid, u64 pos, u64 offset,
2306 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2307 struct btrfs_root *root, u64 objectid,
2308 u64 offset, char *buffer, size_t size);
2309 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2310 struct btrfs_root *root, u64 alloc_end,
2311 u64 bytenr, char *data, size_t len);
2312 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2313 struct btrfs_root *root, struct btrfs_path *path,
2317 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2318 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,