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__
20 #define __BTRFS_CTREE__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include <linux/pagemap.h>
34 #include "extent_io.h"
35 #include "extent_map.h"
36 #include "async-thread.h"
39 struct btrfs_trans_handle;
40 struct btrfs_transaction;
41 struct btrfs_pending_snapshot;
42 extern struct kmem_cache *btrfs_trans_handle_cachep;
43 extern struct kmem_cache *btrfs_transaction_cachep;
44 extern struct kmem_cache *btrfs_bit_radix_cachep;
45 extern struct kmem_cache *btrfs_path_cachep;
46 extern struct kmem_cache *btrfs_free_space_cachep;
47 struct btrfs_ordered_sum;
49 #define BTRFS_MAGIC "_BHRfS_M"
51 #define BTRFS_MAX_MIRRORS 3
53 #define BTRFS_MAX_LEVEL 8
55 #define BTRFS_COMPAT_EXTENT_TREE_V0
58 * files bigger than this get some pre-flushing when they are added
59 * to the ordered operations list. That way we limit the total
60 * work done by the commit
62 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
64 /* holds pointers to all of the tree roots */
65 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
67 /* stores information about which extents are in use, and reference counts */
68 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
71 * chunk tree stores translations from logical -> physical block numbering
72 * the super block points to the chunk tree
74 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
77 * stores information about which areas of a given device are in use.
78 * one per device. The tree of tree roots points to the device tree
80 #define BTRFS_DEV_TREE_OBJECTID 4ULL
82 /* one per subvolume, storing files and directories */
83 #define BTRFS_FS_TREE_OBJECTID 5ULL
85 /* directory objectid inside the root tree */
86 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
88 /* holds checksums of all the data extents */
89 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
91 /* for storing balance parameters in the root tree */
92 #define BTRFS_BALANCE_OBJECTID -4ULL
94 /* holds quota configuration and tracking */
95 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
97 /* orhpan objectid for tracking unlinked/truncated files */
98 #define BTRFS_ORPHAN_OBJECTID -5ULL
100 /* does write ahead logging to speed up fsyncs */
101 #define BTRFS_TREE_LOG_OBJECTID -6ULL
102 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
104 /* for space balancing */
105 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
106 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
109 * extent checksums all have this objectid
110 * this allows them to share the logging tree
113 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
115 /* For storing free space cache */
116 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
119 * The inode number assigned to the special inode for storing
122 #define BTRFS_FREE_INO_OBJECTID -12ULL
124 /* dummy objectid represents multiple objectids */
125 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
128 * All files have objectids in this range.
130 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
131 #define BTRFS_LAST_FREE_OBJECTID -256ULL
132 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
136 * the device items go into the chunk tree. The key is in the form
137 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
139 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
141 #define BTRFS_BTREE_INODE_OBJECTID 1
143 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
145 #define BTRFS_DEV_REPLACE_DEVID 0
148 * the max metadata block size. This limit is somewhat artificial,
149 * but the memmove costs go through the roof for larger blocks.
151 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
154 * we can actually store much bigger names, but lets not confuse the rest
157 #define BTRFS_NAME_LEN 255
160 * Theoretical limit is larger, but we keep this down to a sane
161 * value. That should limit greatly the possibility of collisions on
164 #define BTRFS_LINK_MAX 65535U
166 /* 32 bytes in various csum fields */
167 #define BTRFS_CSUM_SIZE 32
170 #define BTRFS_CSUM_TYPE_CRC32 0
172 static int btrfs_csum_sizes[] = { 4, 0 };
174 /* four bytes for CRC32 */
175 #define BTRFS_EMPTY_DIR_SIZE 0
177 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
178 #define REQ_GET_READ_MIRRORS (1 << 30)
180 #define BTRFS_FT_UNKNOWN 0
181 #define BTRFS_FT_REG_FILE 1
182 #define BTRFS_FT_DIR 2
183 #define BTRFS_FT_CHRDEV 3
184 #define BTRFS_FT_BLKDEV 4
185 #define BTRFS_FT_FIFO 5
186 #define BTRFS_FT_SOCK 6
187 #define BTRFS_FT_SYMLINK 7
188 #define BTRFS_FT_XATTR 8
189 #define BTRFS_FT_MAX 9
191 /* ioprio of readahead is set to idle */
192 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
195 * The key defines the order in the tree, and so it also defines (optimal)
198 * objectid corresponds to the inode number.
200 * type tells us things about the object, and is a kind of stream selector.
201 * so for a given inode, keys with type of 1 might refer to the inode data,
202 * type of 2 may point to file data in the btree and type == 3 may point to
205 * offset is the starting byte offset for this key in the stream.
207 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
208 * in cpu native order. Otherwise they are identical and their sizes
209 * should be the same (ie both packed)
211 struct btrfs_disk_key {
215 } __attribute__ ((__packed__));
221 } __attribute__ ((__packed__));
223 struct btrfs_mapping_tree {
224 struct extent_map_tree map_tree;
227 struct btrfs_dev_item {
228 /* the internal btrfs device id */
231 /* size of the device */
237 /* optimal io alignment for this device */
240 /* optimal io width for this device */
243 /* minimal io size for this device */
246 /* type and info about this device */
249 /* expected generation for this device */
253 * starting byte of this partition on the device,
254 * to allow for stripe alignment in the future
258 /* grouping information for allocation decisions */
261 /* seek speed 0-100 where 100 is fastest */
264 /* bandwidth 0-100 where 100 is fastest */
267 /* btrfs generated uuid for this device */
268 u8 uuid[BTRFS_UUID_SIZE];
270 /* uuid of FS who owns this device */
271 u8 fsid[BTRFS_UUID_SIZE];
272 } __attribute__ ((__packed__));
274 struct btrfs_stripe {
277 u8 dev_uuid[BTRFS_UUID_SIZE];
278 } __attribute__ ((__packed__));
281 /* size of this chunk in bytes */
284 /* objectid of the root referencing this chunk */
290 /* optimal io alignment for this chunk */
293 /* optimal io width for this chunk */
296 /* minimal io size for this chunk */
299 /* 2^16 stripes is quite a lot, a second limit is the size of a single
304 /* sub stripes only matter for raid10 */
306 struct btrfs_stripe stripe;
307 /* additional stripes go here */
308 } __attribute__ ((__packed__));
310 #define BTRFS_FREE_SPACE_EXTENT 1
311 #define BTRFS_FREE_SPACE_BITMAP 2
313 struct btrfs_free_space_entry {
317 } __attribute__ ((__packed__));
319 struct btrfs_free_space_header {
320 struct btrfs_disk_key location;
324 } __attribute__ ((__packed__));
326 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
328 BUG_ON(num_stripes == 0);
329 return sizeof(struct btrfs_chunk) +
330 sizeof(struct btrfs_stripe) * (num_stripes - 1);
333 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
334 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
340 /* Errors detected */
341 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
343 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
344 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
346 #define BTRFS_BACKREF_REV_MAX 256
347 #define BTRFS_BACKREF_REV_SHIFT 56
348 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
349 BTRFS_BACKREF_REV_SHIFT)
351 #define BTRFS_OLD_BACKREF_REV 0
352 #define BTRFS_MIXED_BACKREF_REV 1
355 * every tree block (leaf or node) starts with this header.
357 struct btrfs_header {
358 /* these first four must match the super block */
359 u8 csum[BTRFS_CSUM_SIZE];
360 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
361 __le64 bytenr; /* which block this node is supposed to live in */
364 /* allowed to be different from the super from here on down */
365 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
370 } __attribute__ ((__packed__));
372 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
373 sizeof(struct btrfs_header)) / \
374 sizeof(struct btrfs_key_ptr))
375 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
376 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
377 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
378 sizeof(struct btrfs_item) - \
379 sizeof(struct btrfs_file_extent_item))
380 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
381 sizeof(struct btrfs_item) -\
382 sizeof(struct btrfs_dir_item))
386 * this is a very generous portion of the super block, giving us
387 * room to translate 14 chunks with 3 stripes each.
389 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
390 #define BTRFS_LABEL_SIZE 256
393 * just in case we somehow lose the roots and are not able to mount,
394 * we store an array of the roots from previous transactions
397 #define BTRFS_NUM_BACKUP_ROOTS 4
398 struct btrfs_root_backup {
400 __le64 tree_root_gen;
403 __le64 chunk_root_gen;
406 __le64 extent_root_gen;
415 __le64 csum_root_gen;
425 u8 extent_root_level;
429 /* future and to align */
431 } __attribute__ ((__packed__));
434 * the super block basically lists the main trees of the FS
435 * it currently lacks any block count etc etc
437 struct btrfs_super_block {
438 u8 csum[BTRFS_CSUM_SIZE];
439 /* the first 4 fields must match struct btrfs_header */
440 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
441 __le64 bytenr; /* this block number */
444 /* allowed to be different from the btrfs_header from here own down */
451 /* this will help find the new super based on the log root */
452 __le64 log_root_transid;
455 __le64 root_dir_objectid;
461 __le32 sys_chunk_array_size;
462 __le64 chunk_root_generation;
464 __le64 compat_ro_flags;
465 __le64 incompat_flags;
470 struct btrfs_dev_item dev_item;
472 char label[BTRFS_LABEL_SIZE];
474 __le64 cache_generation;
476 /* future expansion */
478 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
479 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
480 } __attribute__ ((__packed__));
483 * Compat flags that we support. If any incompat flags are set other than the
484 * ones specified below then we will fail to mount
486 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
487 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
488 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
489 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
491 * some patches floated around with a second compression method
492 * lets save that incompat here for when they do get in
493 * Note we don't actually support it, we're just reserving the
496 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
499 * older kernels tried to do bigger metadata blocks, but the
500 * code was pretty buggy. Lets not let them try anymore.
502 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
504 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
505 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
507 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
508 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
509 #define BTRFS_FEATURE_INCOMPAT_SUPP \
510 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
511 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
512 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
513 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
514 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
515 BTRFS_FEATURE_INCOMPAT_RAID56 | \
516 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
519 * A leaf is full of items. offset and size tell us where to find
520 * the item in the leaf (relative to the start of the data area)
523 struct btrfs_disk_key key;
526 } __attribute__ ((__packed__));
529 * leaves have an item area and a data area:
530 * [item0, item1....itemN] [free space] [dataN...data1, data0]
532 * The data is separate from the items to get the keys closer together
536 struct btrfs_header header;
537 struct btrfs_item items[];
538 } __attribute__ ((__packed__));
541 * all non-leaf blocks are nodes, they hold only keys and pointers to
544 struct btrfs_key_ptr {
545 struct btrfs_disk_key key;
548 } __attribute__ ((__packed__));
551 struct btrfs_header header;
552 struct btrfs_key_ptr ptrs[];
553 } __attribute__ ((__packed__));
556 * btrfs_paths remember the path taken from the root down to the leaf.
557 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
558 * to any other levels that are present.
560 * The slots array records the index of the item or block pointer
561 * used while walking the tree.
564 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
565 int slots[BTRFS_MAX_LEVEL];
566 /* if there is real range locking, this locks field will change */
567 int locks[BTRFS_MAX_LEVEL];
569 /* keep some upper locks as we walk down */
573 * set by btrfs_split_item, tells search_slot to keep all locks
574 * and to force calls to keep space in the nodes
576 unsigned int search_for_split:1;
577 unsigned int keep_locks:1;
578 unsigned int skip_locking:1;
579 unsigned int leave_spinning:1;
580 unsigned int search_commit_root:1;
581 unsigned int really_keep_locks:1;
585 * items in the extent btree are used to record the objectid of the
586 * owner of the block and the number of references
589 struct btrfs_extent_item {
593 } __attribute__ ((__packed__));
595 struct btrfs_extent_item_v0 {
597 } __attribute__ ((__packed__));
599 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
600 sizeof(struct btrfs_item))
602 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
603 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
605 /* following flags only apply to tree blocks */
607 /* use full backrefs for extent pointers in the block */
608 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
611 * this flag is only used internally by scrub and may be changed at any time
612 * it is only declared here to avoid collisions
614 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
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 /* old style backrefs item */
638 struct btrfs_extent_ref_v0 {
643 } __attribute__ ((__packed__));
646 /* dev extents record free space on individual devices. The owner
647 * field points back to the chunk allocation mapping tree that allocated
648 * the extent. The chunk tree uuid field is a way to double check the owner
650 struct btrfs_dev_extent {
652 __le64 chunk_objectid;
655 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
656 } __attribute__ ((__packed__));
658 struct btrfs_inode_ref {
662 } __attribute__ ((__packed__));
664 struct btrfs_inode_extref {
665 __le64 parent_objectid;
670 } __attribute__ ((__packed__));
672 struct btrfs_timespec {
675 } __attribute__ ((__packed__));
677 enum btrfs_compression_type {
678 BTRFS_COMPRESS_NONE = 0,
679 BTRFS_COMPRESS_ZLIB = 1,
680 BTRFS_COMPRESS_LZO = 2,
681 BTRFS_COMPRESS_TYPES = 2,
682 BTRFS_COMPRESS_LAST = 3,
685 struct btrfs_inode_item {
686 /* nfs style generation number */
688 /* transid that last touched this inode */
700 /* modification sequence number for NFS */
704 * a little future expansion, for more than this we can
705 * just grow the inode item and version it
708 struct btrfs_timespec atime;
709 struct btrfs_timespec ctime;
710 struct btrfs_timespec mtime;
711 struct btrfs_timespec otime;
712 } __attribute__ ((__packed__));
714 struct btrfs_dir_log_item {
716 } __attribute__ ((__packed__));
718 struct btrfs_dir_item {
719 struct btrfs_disk_key location;
724 } __attribute__ ((__packed__));
726 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
728 struct btrfs_root_item {
729 struct btrfs_inode_item inode;
735 __le64 last_snapshot;
738 struct btrfs_disk_key drop_progress;
743 * The following fields appear after subvol_uuids+subvol_times
748 * This generation number is used to test if the new fields are valid
749 * and up to date while reading the root item. Everytime the root item
750 * is written out, the "generation" field is copied into this field. If
751 * anyone ever mounted the fs with an older kernel, we will have
752 * mismatching generation values here and thus must invalidate the
753 * new fields. See btrfs_update_root and btrfs_find_last_root for
755 * the offset of generation_v2 is also used as the start for the memset
756 * when invalidating the fields.
758 __le64 generation_v2;
759 u8 uuid[BTRFS_UUID_SIZE];
760 u8 parent_uuid[BTRFS_UUID_SIZE];
761 u8 received_uuid[BTRFS_UUID_SIZE];
762 __le64 ctransid; /* updated when an inode changes */
763 __le64 otransid; /* trans when created */
764 __le64 stransid; /* trans when sent. non-zero for received subvol */
765 __le64 rtransid; /* trans when received. non-zero for received subvol */
766 struct btrfs_timespec ctime;
767 struct btrfs_timespec otime;
768 struct btrfs_timespec stime;
769 struct btrfs_timespec rtime;
770 __le64 reserved[8]; /* for future */
771 } __attribute__ ((__packed__));
774 * this is used for both forward and backward root refs
776 struct btrfs_root_ref {
780 } __attribute__ ((__packed__));
782 struct btrfs_disk_balance_args {
784 * profiles to operate on, single is denoted by
785 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
795 /* devid subset filter [pstart..pend) */
799 /* btrfs virtual address space subset filter [vstart..vend) */
804 * profile to convert to, single is denoted by
805 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
809 /* BTRFS_BALANCE_ARGS_* */
813 } __attribute__ ((__packed__));
816 * store balance parameters to disk so that balance can be properly
817 * resumed after crash or unmount
819 struct btrfs_balance_item {
820 /* BTRFS_BALANCE_* */
823 struct btrfs_disk_balance_args data;
824 struct btrfs_disk_balance_args meta;
825 struct btrfs_disk_balance_args sys;
828 } __attribute__ ((__packed__));
830 #define BTRFS_FILE_EXTENT_INLINE 0
831 #define BTRFS_FILE_EXTENT_REG 1
832 #define BTRFS_FILE_EXTENT_PREALLOC 2
834 struct btrfs_file_extent_item {
836 * transaction id that created this extent
840 * max number of bytes to hold this extent in ram
841 * when we split a compressed extent we can't know how big
842 * each of the resulting pieces will be. So, this is
843 * an upper limit on the size of the extent in ram instead of
849 * 32 bits for the various ways we might encode the data,
850 * including compression and encryption. If any of these
851 * are set to something a given disk format doesn't understand
852 * it is treated like an incompat flag for reading and writing,
857 __le16 other_encoding; /* spare for later use */
859 /* are we inline data or a real extent? */
863 * disk space consumed by the extent, checksum blocks are included
867 __le64 disk_num_bytes;
869 * the logical offset in file blocks (no csums)
870 * this extent record is for. This allows a file extent to point
871 * into the middle of an existing extent on disk, sharing it
872 * between two snapshots (useful if some bytes in the middle of the
873 * extent have changed
877 * the logical number of file blocks (no csums included). This
878 * always reflects the size uncompressed and without encoding.
882 } __attribute__ ((__packed__));
884 struct btrfs_csum_item {
886 } __attribute__ ((__packed__));
888 struct btrfs_dev_stats_item {
890 * grow this item struct at the end for future enhancements and keep
891 * the existing values unchanged
893 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
894 } __attribute__ ((__packed__));
896 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
897 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
898 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
899 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
900 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
901 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
902 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
904 struct btrfs_dev_replace {
905 u64 replace_state; /* see #define above */
906 u64 time_started; /* seconds since 1-Jan-1970 */
907 u64 time_stopped; /* seconds since 1-Jan-1970 */
908 atomic64_t num_write_errors;
909 atomic64_t num_uncorrectable_read_errors;
912 u64 committed_cursor_left;
913 u64 cursor_left_last_write_of_item;
916 u64 cont_reading_from_srcdev_mode; /* see #define above */
919 int item_needs_writeback;
920 struct btrfs_device *srcdev;
921 struct btrfs_device *tgtdev;
924 atomic_t nesting_level;
925 struct mutex lock_finishing_cancel_unmount;
926 struct mutex lock_management_lock;
929 struct btrfs_scrub_progress scrub_progress;
932 struct btrfs_dev_replace_item {
934 * grow this item struct at the end for future enhancements and keep
935 * the existing values unchanged
940 __le64 cont_reading_from_srcdev_mode;
942 __le64 replace_state;
945 __le64 num_write_errors;
946 __le64 num_uncorrectable_read_errors;
947 } __attribute__ ((__packed__));
949 /* different types of block groups (and chunks) */
950 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
951 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
952 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
953 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
954 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
955 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
956 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
957 #define BTRFS_BLOCK_GROUP_RAID5 (1 << 7)
958 #define BTRFS_BLOCK_GROUP_RAID6 (1 << 8)
959 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
960 #define BTRFS_NR_RAID_TYPES 7
962 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
963 BTRFS_BLOCK_GROUP_SYSTEM | \
964 BTRFS_BLOCK_GROUP_METADATA)
966 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
967 BTRFS_BLOCK_GROUP_RAID1 | \
968 BTRFS_BLOCK_GROUP_RAID5 | \
969 BTRFS_BLOCK_GROUP_RAID6 | \
970 BTRFS_BLOCK_GROUP_DUP | \
971 BTRFS_BLOCK_GROUP_RAID10)
973 * We need a bit for restriper to be able to tell when chunks of type
974 * SINGLE are available. This "extended" profile format is used in
975 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
976 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
977 * to avoid remappings between two formats in future.
979 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
981 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
982 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
984 static inline u64 chunk_to_extended(u64 flags)
986 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
987 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
991 static inline u64 extended_to_chunk(u64 flags)
993 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
996 struct btrfs_block_group_item {
998 __le64 chunk_objectid;
1000 } __attribute__ ((__packed__));
1003 * is subvolume quota turned on?
1005 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1007 * SCANNING is set during the initialization phase
1009 #define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
1011 * Some qgroup entries are known to be out of date,
1012 * either because the configuration has changed in a way that
1013 * makes a rescan necessary, or because the fs has been mounted
1014 * with a non-qgroup-aware version.
1015 * Turning qouta off and on again makes it inconsistent, too.
1017 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1019 #define BTRFS_QGROUP_STATUS_VERSION 1
1021 struct btrfs_qgroup_status_item {
1024 * the generation is updated during every commit. As older
1025 * versions of btrfs are not aware of qgroups, it will be
1026 * possible to detect inconsistencies by checking the
1027 * generation on mount time
1031 /* flag definitions see above */
1035 * only used during scanning to record the progress
1036 * of the scan. It contains a logical address
1039 } __attribute__ ((__packed__));
1041 struct btrfs_qgroup_info_item {
1047 } __attribute__ ((__packed__));
1049 /* flags definition for qgroup limits */
1050 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1051 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1052 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1053 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1054 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1055 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1057 struct btrfs_qgroup_limit_item {
1059 * only updated when any of the other values change
1066 } __attribute__ ((__packed__));
1068 struct btrfs_space_info {
1071 u64 total_bytes; /* total bytes in the space,
1072 this doesn't take mirrors into account */
1073 u64 bytes_used; /* total bytes used,
1074 this doesn't take mirrors into account */
1075 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1076 transaction finishes */
1077 u64 bytes_reserved; /* total bytes the allocator has reserved for
1078 current allocations */
1079 u64 bytes_readonly; /* total bytes that are read only */
1081 u64 bytes_may_use; /* number of bytes that may be used for
1082 delalloc/allocations */
1083 u64 disk_used; /* total bytes used on disk */
1084 u64 disk_total; /* total bytes on disk, takes mirrors into
1088 * we bump reservation progress every time we decrement
1089 * bytes_reserved. This way people waiting for reservations
1090 * know something good has happened and they can check
1091 * for progress. The number here isn't to be trusted, it
1092 * just shows reclaim activity
1094 unsigned long reservation_progress;
1096 unsigned int full:1; /* indicates that we cannot allocate any more
1097 chunks for this space */
1098 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1100 unsigned int flush:1; /* set if we are trying to make space */
1102 unsigned int force_alloc; /* set if we need to force a chunk
1103 alloc for this space */
1105 struct list_head list;
1107 /* for block groups in our same type */
1108 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1110 struct rw_semaphore groups_sem;
1111 wait_queue_head_t wait;
1114 #define BTRFS_BLOCK_RSV_GLOBAL 1
1115 #define BTRFS_BLOCK_RSV_DELALLOC 2
1116 #define BTRFS_BLOCK_RSV_TRANS 3
1117 #define BTRFS_BLOCK_RSV_CHUNK 4
1118 #define BTRFS_BLOCK_RSV_DELOPS 5
1119 #define BTRFS_BLOCK_RSV_EMPTY 6
1120 #define BTRFS_BLOCK_RSV_TEMP 7
1122 struct btrfs_block_rsv {
1125 struct btrfs_space_info *space_info;
1127 unsigned short full;
1128 unsigned short type;
1129 unsigned short failfast;
1133 * free clusters are used to claim free space in relatively large chunks,
1134 * allowing us to do less seeky writes. They are used for all metadata
1135 * allocations and data allocations in ssd mode.
1137 struct btrfs_free_cluster {
1139 spinlock_t refill_lock;
1140 struct rb_root root;
1142 /* largest extent in this cluster */
1145 /* first extent starting offset */
1148 struct btrfs_block_group_cache *block_group;
1150 * when a cluster is allocated from a block group, we put the
1151 * cluster onto a list in the block group so that it can
1152 * be freed before the block group is freed.
1154 struct list_head block_group_list;
1157 enum btrfs_caching_type {
1159 BTRFS_CACHE_STARTED = 1,
1160 BTRFS_CACHE_FAST = 2,
1161 BTRFS_CACHE_FINISHED = 3,
1164 enum btrfs_disk_cache_state {
1165 BTRFS_DC_WRITTEN = 0,
1169 BTRFS_DC_NEED_WRITE = 4,
1172 struct btrfs_caching_control {
1173 struct list_head list;
1175 wait_queue_head_t wait;
1176 struct btrfs_work work;
1177 struct btrfs_block_group_cache *block_group;
1182 struct btrfs_block_group_cache {
1183 struct btrfs_key key;
1184 struct btrfs_block_group_item item;
1185 struct btrfs_fs_info *fs_info;
1186 struct inode *inode;
1193 u64 cache_generation;
1195 /* for raid56, this is a full stripe, without parity */
1196 unsigned long full_stripe_len;
1199 unsigned int dirty:1;
1200 unsigned int iref:1;
1202 int disk_cache_state;
1204 /* cache tracking stuff */
1206 struct btrfs_caching_control *caching_ctl;
1207 u64 last_byte_to_unpin;
1209 struct btrfs_space_info *space_info;
1211 /* free space cache stuff */
1212 struct btrfs_free_space_ctl *free_space_ctl;
1214 /* block group cache stuff */
1215 struct rb_node cache_node;
1217 /* for block groups in the same raid type */
1218 struct list_head list;
1223 /* List of struct btrfs_free_clusters for this block group.
1224 * Today it will only have one thing on it, but that may change
1226 struct list_head cluster_list;
1228 /* For delayed block group creation */
1229 struct list_head new_bg_list;
1232 /* delayed seq elem */
1234 struct list_head list;
1238 /* used by the raid56 code to lock stripes for read/modify/write */
1239 struct btrfs_stripe_hash {
1240 struct list_head hash_list;
1241 wait_queue_head_t wait;
1245 /* used by the raid56 code to lock stripes for read/modify/write */
1246 struct btrfs_stripe_hash_table {
1247 struct btrfs_stripe_hash *table;
1250 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1253 struct reloc_control;
1254 struct btrfs_device;
1255 struct btrfs_fs_devices;
1256 struct btrfs_balance_control;
1257 struct btrfs_delayed_root;
1258 struct btrfs_fs_info {
1259 u8 fsid[BTRFS_FSID_SIZE];
1260 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1261 struct btrfs_root *extent_root;
1262 struct btrfs_root *tree_root;
1263 struct btrfs_root *chunk_root;
1264 struct btrfs_root *dev_root;
1265 struct btrfs_root *fs_root;
1266 struct btrfs_root *csum_root;
1267 struct btrfs_root *quota_root;
1269 /* the log root tree is a directory of all the other log roots */
1270 struct btrfs_root *log_root_tree;
1272 spinlock_t fs_roots_radix_lock;
1273 struct radix_tree_root fs_roots_radix;
1275 /* block group cache stuff */
1276 spinlock_t block_group_cache_lock;
1277 struct rb_root block_group_cache_tree;
1279 /* keep track of unallocated space */
1280 spinlock_t free_chunk_lock;
1281 u64 free_chunk_space;
1283 struct extent_io_tree freed_extents[2];
1284 struct extent_io_tree *pinned_extents;
1286 /* logical->physical extent mapping */
1287 struct btrfs_mapping_tree mapping_tree;
1290 * block reservation for extent, checksum, root tree and
1291 * delayed dir index item
1293 struct btrfs_block_rsv global_block_rsv;
1294 /* block reservation for delay allocation */
1295 struct btrfs_block_rsv delalloc_block_rsv;
1296 /* block reservation for metadata operations */
1297 struct btrfs_block_rsv trans_block_rsv;
1298 /* block reservation for chunk tree */
1299 struct btrfs_block_rsv chunk_block_rsv;
1300 /* block reservation for delayed operations */
1301 struct btrfs_block_rsv delayed_block_rsv;
1303 struct btrfs_block_rsv empty_block_rsv;
1306 u64 last_trans_committed;
1309 * this is updated to the current trans every time a full commit
1310 * is required instead of the faster short fsync log commits
1312 u64 last_trans_log_full_commit;
1313 unsigned long mount_opt;
1314 unsigned long compress_type:4;
1317 struct btrfs_transaction *running_transaction;
1318 wait_queue_head_t transaction_throttle;
1319 wait_queue_head_t transaction_wait;
1320 wait_queue_head_t transaction_blocked_wait;
1321 wait_queue_head_t async_submit_wait;
1323 struct btrfs_super_block *super_copy;
1324 struct btrfs_super_block *super_for_commit;
1325 struct block_device *__bdev;
1326 struct super_block *sb;
1327 struct inode *btree_inode;
1328 struct backing_dev_info bdi;
1329 struct mutex tree_log_mutex;
1330 struct mutex transaction_kthread_mutex;
1331 struct mutex cleaner_mutex;
1332 struct mutex chunk_mutex;
1333 struct mutex volume_mutex;
1335 /* this is used during read/modify/write to make sure
1336 * no two ios are trying to mod the same stripe at the same
1339 struct btrfs_stripe_hash_table *stripe_hash_table;
1342 * this protects the ordered operations list only while we are
1343 * processing all of the entries on it. This way we make
1344 * sure the commit code doesn't find the list temporarily empty
1345 * because another function happens to be doing non-waiting preflush
1346 * before jumping into the main commit.
1348 struct mutex ordered_operations_mutex;
1349 struct rw_semaphore extent_commit_sem;
1351 struct rw_semaphore cleanup_work_sem;
1353 struct rw_semaphore subvol_sem;
1354 struct srcu_struct subvol_srcu;
1356 spinlock_t trans_lock;
1358 * the reloc mutex goes with the trans lock, it is taken
1359 * during commit to protect us from the relocation code
1361 struct mutex reloc_mutex;
1363 struct list_head trans_list;
1364 struct list_head dead_roots;
1365 struct list_head caching_block_groups;
1367 spinlock_t delayed_iput_lock;
1368 struct list_head delayed_iputs;
1370 /* this protects tree_mod_seq_list */
1371 spinlock_t tree_mod_seq_lock;
1372 atomic_t tree_mod_seq;
1373 struct list_head tree_mod_seq_list;
1374 struct seq_list tree_mod_seq_elem;
1376 /* this protects tree_mod_log */
1377 rwlock_t tree_mod_log_lock;
1378 struct rb_root tree_mod_log;
1380 atomic_t nr_async_submits;
1381 atomic_t async_submit_draining;
1382 atomic_t nr_async_bios;
1383 atomic_t async_delalloc_pages;
1384 atomic_t open_ioctl_trans;
1387 * this is used by the balancing code to wait for all the pending
1390 spinlock_t ordered_extent_lock;
1393 * all of the data=ordered extents pending writeback
1394 * these can span multiple transactions and basically include
1395 * every dirty data page that isn't from nodatacow
1397 struct list_head ordered_extents;
1400 * all of the inodes that have delalloc bytes. It is possible for
1401 * this list to be empty even when there is still dirty data=ordered
1402 * extents waiting to finish IO.
1404 struct list_head delalloc_inodes;
1407 * special rename and truncate targets that must be on disk before
1408 * we're allowed to commit. This is basically the ext3 style
1409 * data=ordered list.
1411 struct list_head ordered_operations;
1414 * there is a pool of worker threads for checksumming during writes
1415 * and a pool for checksumming after reads. This is because readers
1416 * can run with FS locks held, and the writers may be waiting for
1417 * those locks. We don't want ordering in the pending list to cause
1418 * deadlocks, and so the two are serviced separately.
1420 * A third pool does submit_bio to avoid deadlocking with the other
1423 struct btrfs_workers generic_worker;
1424 struct btrfs_workers workers;
1425 struct btrfs_workers delalloc_workers;
1426 struct btrfs_workers flush_workers;
1427 struct btrfs_workers endio_workers;
1428 struct btrfs_workers endio_meta_workers;
1429 struct btrfs_workers endio_raid56_workers;
1430 struct btrfs_workers rmw_workers;
1431 struct btrfs_workers endio_meta_write_workers;
1432 struct btrfs_workers endio_write_workers;
1433 struct btrfs_workers endio_freespace_worker;
1434 struct btrfs_workers submit_workers;
1435 struct btrfs_workers caching_workers;
1436 struct btrfs_workers readahead_workers;
1439 * fixup workers take dirty pages that didn't properly go through
1440 * the cow mechanism and make them safe to write. It happens
1441 * for the sys_munmap function call path
1443 struct btrfs_workers fixup_workers;
1444 struct btrfs_workers delayed_workers;
1445 struct task_struct *transaction_kthread;
1446 struct task_struct *cleaner_kthread;
1447 int thread_pool_size;
1449 struct kobject super_kobj;
1450 struct completion kobj_unregister;
1453 int log_root_recovering;
1459 /* protected by the delalloc lock, used to keep from writing
1460 * metadata until there is a nice batch
1462 u64 dirty_metadata_bytes;
1463 struct list_head dirty_cowonly_roots;
1465 struct btrfs_fs_devices *fs_devices;
1468 * the space_info list is almost entirely read only. It only changes
1469 * when we add a new raid type to the FS, and that happens
1470 * very rarely. RCU is used to protect it.
1472 struct list_head space_info;
1474 struct btrfs_space_info *data_sinfo;
1476 struct reloc_control *reloc_ctl;
1478 spinlock_t delalloc_lock;
1481 /* data_alloc_cluster is only used in ssd mode */
1482 struct btrfs_free_cluster data_alloc_cluster;
1484 /* all metadata allocations go through this cluster */
1485 struct btrfs_free_cluster meta_alloc_cluster;
1487 /* auto defrag inodes go here */
1488 spinlock_t defrag_inodes_lock;
1489 struct rb_root defrag_inodes;
1490 atomic_t defrag_running;
1493 * these three are in extended format (availability of single
1494 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1495 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1497 u64 avail_data_alloc_bits;
1498 u64 avail_metadata_alloc_bits;
1499 u64 avail_system_alloc_bits;
1501 /* restriper state */
1502 spinlock_t balance_lock;
1503 struct mutex balance_mutex;
1504 atomic_t balance_running;
1505 atomic_t balance_pause_req;
1506 atomic_t balance_cancel_req;
1507 struct btrfs_balance_control *balance_ctl;
1508 wait_queue_head_t balance_wait_q;
1510 unsigned data_chunk_allocations;
1511 unsigned metadata_ratio;
1515 /* private scrub information */
1516 struct mutex scrub_lock;
1517 atomic_t scrubs_running;
1518 atomic_t scrub_pause_req;
1519 atomic_t scrubs_paused;
1520 atomic_t scrub_cancel_req;
1521 wait_queue_head_t scrub_pause_wait;
1522 struct rw_semaphore scrub_super_lock;
1523 int scrub_workers_refcnt;
1524 struct btrfs_workers scrub_workers;
1525 struct btrfs_workers scrub_wr_completion_workers;
1526 struct btrfs_workers scrub_nocow_workers;
1528 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1529 u32 check_integrity_print_mask;
1534 unsigned int quota_enabled:1;
1537 * quota_enabled only changes state after a commit. This holds the
1540 unsigned int pending_quota_state:1;
1542 /* is qgroup tracking in a consistent state? */
1545 /* holds configuration and tracking. Protected by qgroup_lock */
1546 struct rb_root qgroup_tree;
1547 spinlock_t qgroup_lock;
1549 /* list of dirty qgroups to be written at next commit */
1550 struct list_head dirty_qgroups;
1552 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1555 /* filesystem state */
1558 struct btrfs_delayed_root *delayed_root;
1560 /* readahead tree */
1561 spinlock_t reada_lock;
1562 struct radix_tree_root reada_tree;
1564 /* next backup root to be overwritten */
1565 int backup_root_index;
1567 int num_tolerated_disk_barrier_failures;
1569 /* device replace state */
1570 struct btrfs_dev_replace dev_replace;
1572 atomic_t mutually_exclusive_operation_running;
1576 * in ram representation of the tree. extent_root is used for all allocations
1577 * and for the extent tree extent_root root.
1580 struct extent_buffer *node;
1582 struct extent_buffer *commit_root;
1583 struct btrfs_root *log_root;
1584 struct btrfs_root *reloc_root;
1586 struct btrfs_root_item root_item;
1587 struct btrfs_key root_key;
1588 struct btrfs_fs_info *fs_info;
1589 struct extent_io_tree dirty_log_pages;
1591 struct kobject root_kobj;
1592 struct completion kobj_unregister;
1593 struct mutex objectid_mutex;
1595 spinlock_t accounting_lock;
1596 struct btrfs_block_rsv *block_rsv;
1598 /* free ino cache stuff */
1599 struct mutex fs_commit_mutex;
1600 struct btrfs_free_space_ctl *free_ino_ctl;
1601 enum btrfs_caching_type cached;
1602 spinlock_t cache_lock;
1603 wait_queue_head_t cache_wait;
1604 struct btrfs_free_space_ctl *free_ino_pinned;
1606 struct inode *cache_inode;
1608 struct mutex log_mutex;
1609 wait_queue_head_t log_writer_wait;
1610 wait_queue_head_t log_commit_wait[2];
1611 atomic_t log_writers;
1612 atomic_t log_commit[2];
1614 unsigned long log_transid;
1615 unsigned long last_log_commit;
1616 pid_t log_start_pid;
1617 bool log_multiple_pids;
1622 /* data allocations are done in sectorsize units */
1625 /* node allocations are done in nodesize units */
1628 /* leaf allocations are done in leafsize units */
1635 u64 highest_objectid;
1637 /* btrfs_record_root_in_trans is a multi-step process,
1638 * and it can race with the balancing code. But the
1639 * race is very small, and only the first time the root
1640 * is added to each transaction. So in_trans_setup
1641 * is used to tell us when more checks are required
1643 unsigned long in_trans_setup;
1648 u64 defrag_trans_start;
1649 struct btrfs_key defrag_progress;
1650 struct btrfs_key defrag_max;
1654 /* the dirty list is only used by non-reference counted roots */
1655 struct list_head dirty_list;
1657 struct list_head root_list;
1659 spinlock_t orphan_lock;
1660 atomic_t orphan_inodes;
1661 struct btrfs_block_rsv *orphan_block_rsv;
1662 int orphan_item_inserted;
1663 int orphan_cleanup_state;
1665 spinlock_t inode_lock;
1666 /* red-black tree that keeps track of in-memory inodes */
1667 struct rb_root inode_tree;
1670 * radix tree that keeps track of delayed nodes of every inode,
1671 * protected by inode_lock
1673 struct radix_tree_root delayed_nodes_tree;
1675 * right now this just gets used so that a root has its own devid
1676 * for stat. It may be used for more later
1682 spinlock_t root_item_lock;
1685 struct btrfs_ioctl_defrag_range_args {
1686 /* start of the defrag operation */
1689 /* number of bytes to defrag, use (u64)-1 to say all */
1693 * flags for the operation, which can include turning
1694 * on compression for this one defrag
1699 * any extent bigger than this will be considered
1700 * already defragged. Use 0 to take the kernel default
1701 * Use 1 to say every single extent must be rewritten
1703 __u32 extent_thresh;
1706 * which compression method to use if turning on compression
1707 * for this defrag operation. If unspecified, zlib will
1710 __u32 compress_type;
1712 /* spare for later */
1718 * inode items have the data typically returned from stat and store other
1719 * info about object characteristics. There is one for every file and dir in
1722 #define BTRFS_INODE_ITEM_KEY 1
1723 #define BTRFS_INODE_REF_KEY 12
1724 #define BTRFS_INODE_EXTREF_KEY 13
1725 #define BTRFS_XATTR_ITEM_KEY 24
1726 #define BTRFS_ORPHAN_ITEM_KEY 48
1727 /* reserve 2-15 close to the inode for later flexibility */
1730 * dir items are the name -> inode pointers in a directory. There is one
1731 * for every name in a directory.
1733 #define BTRFS_DIR_LOG_ITEM_KEY 60
1734 #define BTRFS_DIR_LOG_INDEX_KEY 72
1735 #define BTRFS_DIR_ITEM_KEY 84
1736 #define BTRFS_DIR_INDEX_KEY 96
1738 * extent data is for file data
1740 #define BTRFS_EXTENT_DATA_KEY 108
1743 * extent csums are stored in a separate tree and hold csums for
1744 * an entire extent on disk.
1746 #define BTRFS_EXTENT_CSUM_KEY 128
1749 * root items point to tree roots. They are typically in the root
1750 * tree used by the super block to find all the other trees
1752 #define BTRFS_ROOT_ITEM_KEY 132
1755 * root backrefs tie subvols and snapshots to the directory entries that
1758 #define BTRFS_ROOT_BACKREF_KEY 144
1761 * root refs make a fast index for listing all of the snapshots and
1762 * subvolumes referenced by a given root. They point directly to the
1763 * directory item in the root that references the subvol
1765 #define BTRFS_ROOT_REF_KEY 156
1768 * extent items are in the extent map tree. These record which blocks
1769 * are used, and how many references there are to each block
1771 #define BTRFS_EXTENT_ITEM_KEY 168
1773 #define BTRFS_TREE_BLOCK_REF_KEY 176
1775 #define BTRFS_EXTENT_DATA_REF_KEY 178
1777 #define BTRFS_EXTENT_REF_V0_KEY 180
1779 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1781 #define BTRFS_SHARED_DATA_REF_KEY 184
1784 * block groups give us hints into the extent allocation trees. Which
1785 * blocks are free etc etc
1787 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1789 #define BTRFS_DEV_EXTENT_KEY 204
1790 #define BTRFS_DEV_ITEM_KEY 216
1791 #define BTRFS_CHUNK_ITEM_KEY 228
1794 * Records the overall state of the qgroups.
1795 * There's only one instance of this key present,
1796 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1798 #define BTRFS_QGROUP_STATUS_KEY 240
1800 * Records the currently used space of the qgroup.
1801 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1803 #define BTRFS_QGROUP_INFO_KEY 242
1805 * Contains the user configured limits for the qgroup.
1806 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1808 #define BTRFS_QGROUP_LIMIT_KEY 244
1810 * Records the child-parent relationship of qgroups. For
1811 * each relation, 2 keys are present:
1812 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1813 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1815 #define BTRFS_QGROUP_RELATION_KEY 246
1817 #define BTRFS_BALANCE_ITEM_KEY 248
1820 * Persistantly stores the io stats in the device tree.
1821 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1823 #define BTRFS_DEV_STATS_KEY 249
1826 * Persistantly stores the device replace state in the device tree.
1827 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1829 #define BTRFS_DEV_REPLACE_KEY 250
1832 * string items are for debugging. They just store a short string of
1835 #define BTRFS_STRING_ITEM_KEY 253
1838 * Flags for mount options.
1840 * Note: don't forget to add new options to btrfs_show_options()
1842 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1843 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1844 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1845 #define BTRFS_MOUNT_SSD (1 << 3)
1846 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1847 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1848 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1849 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1850 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1851 #define BTRFS_MOUNT_NOSSD (1 << 9)
1852 #define BTRFS_MOUNT_DISCARD (1 << 10)
1853 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1854 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1855 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1856 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1857 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1858 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1859 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1860 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1861 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1862 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1863 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1864 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1866 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1867 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1868 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1873 #define BTRFS_INODE_NODATASUM (1 << 0)
1874 #define BTRFS_INODE_NODATACOW (1 << 1)
1875 #define BTRFS_INODE_READONLY (1 << 2)
1876 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1877 #define BTRFS_INODE_PREALLOC (1 << 4)
1878 #define BTRFS_INODE_SYNC (1 << 5)
1879 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1880 #define BTRFS_INODE_APPEND (1 << 7)
1881 #define BTRFS_INODE_NODUMP (1 << 8)
1882 #define BTRFS_INODE_NOATIME (1 << 9)
1883 #define BTRFS_INODE_DIRSYNC (1 << 10)
1884 #define BTRFS_INODE_COMPRESS (1 << 11)
1886 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1888 struct btrfs_map_token {
1889 struct extent_buffer *eb;
1891 unsigned long offset;
1894 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1896 token->kaddr = NULL;
1899 /* some macros to generate set/get funcs for the struct fields. This
1900 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1903 #define le8_to_cpu(v) (v)
1904 #define cpu_to_le8(v) (v)
1907 #define read_eb_member(eb, ptr, type, member, result) ( \
1908 read_extent_buffer(eb, (char *)(result), \
1909 ((unsigned long)(ptr)) + \
1910 offsetof(type, member), \
1911 sizeof(((type *)0)->member)))
1913 #define write_eb_member(eb, ptr, type, member, result) ( \
1914 write_extent_buffer(eb, (char *)(result), \
1915 ((unsigned long)(ptr)) + \
1916 offsetof(type, member), \
1917 sizeof(((type *)0)->member)))
1919 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1920 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1921 unsigned long off, \
1922 struct btrfs_map_token *token); \
1923 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1924 unsigned long off, u##bits val, \
1925 struct btrfs_map_token *token); \
1926 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1927 unsigned long off) \
1929 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1931 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1932 unsigned long off, u##bits val) \
1934 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1937 DECLARE_BTRFS_SETGET_BITS(8)
1938 DECLARE_BTRFS_SETGET_BITS(16)
1939 DECLARE_BTRFS_SETGET_BITS(32)
1940 DECLARE_BTRFS_SETGET_BITS(64)
1942 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1943 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1945 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1946 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1948 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1951 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1952 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1954 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1955 struct btrfs_map_token *token) \
1957 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1958 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1960 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1961 type *s, u##bits val, \
1962 struct btrfs_map_token *token) \
1964 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1965 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1968 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1969 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1971 type *p = page_address(eb->pages[0]); \
1972 u##bits res = le##bits##_to_cpu(p->member); \
1975 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1978 type *p = page_address(eb->pages[0]); \
1979 p->member = cpu_to_le##bits(val); \
1982 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1983 static inline u##bits btrfs_##name(type *s) \
1985 return le##bits##_to_cpu(s->member); \
1987 static inline void btrfs_set_##name(type *s, u##bits val) \
1989 s->member = cpu_to_le##bits(val); \
1992 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1993 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1994 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1995 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1996 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1997 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1999 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2000 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2001 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2002 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2003 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2004 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2006 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2007 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2009 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2011 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2013 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2015 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2017 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2018 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2020 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2022 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2024 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2027 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
2029 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
2032 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
2034 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
2037 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2038 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2039 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2040 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2041 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2042 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2043 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2044 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2045 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2046 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2047 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2049 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2051 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2054 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2055 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2056 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2058 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2060 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2062 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2064 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2065 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2067 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2069 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2070 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2072 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2075 unsigned long offset = (unsigned long)c;
2076 offset += offsetof(struct btrfs_chunk, stripe);
2077 offset += nr * sizeof(struct btrfs_stripe);
2078 return (struct btrfs_stripe *)offset;
2081 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2083 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2086 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2087 struct btrfs_chunk *c, int nr)
2089 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2092 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2093 struct btrfs_chunk *c, int nr)
2095 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2098 /* struct btrfs_block_group_item */
2099 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2101 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2103 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2104 struct btrfs_block_group_item, chunk_objectid, 64);
2106 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2107 struct btrfs_block_group_item, chunk_objectid, 64);
2108 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2109 struct btrfs_block_group_item, flags, 64);
2110 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2111 struct btrfs_block_group_item, flags, 64);
2113 /* struct btrfs_inode_ref */
2114 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2115 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2117 /* struct btrfs_inode_extref */
2118 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2119 parent_objectid, 64);
2120 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2122 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2124 /* struct btrfs_inode_item */
2125 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2126 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2127 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2128 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2129 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2130 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2131 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2132 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2133 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2134 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2135 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2136 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2138 static inline struct btrfs_timespec *
2139 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
2141 unsigned long ptr = (unsigned long)inode_item;
2142 ptr += offsetof(struct btrfs_inode_item, atime);
2143 return (struct btrfs_timespec *)ptr;
2146 static inline struct btrfs_timespec *
2147 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
2149 unsigned long ptr = (unsigned long)inode_item;
2150 ptr += offsetof(struct btrfs_inode_item, mtime);
2151 return (struct btrfs_timespec *)ptr;
2154 static inline struct btrfs_timespec *
2155 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
2157 unsigned long ptr = (unsigned long)inode_item;
2158 ptr += offsetof(struct btrfs_inode_item, ctime);
2159 return (struct btrfs_timespec *)ptr;
2162 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2163 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2165 /* struct btrfs_dev_extent */
2166 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2168 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2169 chunk_objectid, 64);
2170 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2172 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2174 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2176 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2177 return (u8 *)((unsigned long)dev + ptr);
2180 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2181 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2183 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2185 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2188 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2190 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2191 struct btrfs_tree_block_info *item,
2192 struct btrfs_disk_key *key)
2194 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2197 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2198 struct btrfs_tree_block_info *item,
2199 struct btrfs_disk_key *key)
2201 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2204 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2206 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2208 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2210 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2213 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2216 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2218 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2221 static inline u32 btrfs_extent_inline_ref_size(int type)
2223 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2224 type == BTRFS_SHARED_BLOCK_REF_KEY)
2225 return sizeof(struct btrfs_extent_inline_ref);
2226 if (type == BTRFS_SHARED_DATA_REF_KEY)
2227 return sizeof(struct btrfs_shared_data_ref) +
2228 sizeof(struct btrfs_extent_inline_ref);
2229 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2230 return sizeof(struct btrfs_extent_data_ref) +
2231 offsetof(struct btrfs_extent_inline_ref, offset);
2236 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2237 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2239 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2240 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2242 /* struct btrfs_node */
2243 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2244 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2246 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2249 ptr = offsetof(struct btrfs_node, ptrs) +
2250 sizeof(struct btrfs_key_ptr) * nr;
2251 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2254 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2258 ptr = offsetof(struct btrfs_node, ptrs) +
2259 sizeof(struct btrfs_key_ptr) * nr;
2260 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2263 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2266 ptr = offsetof(struct btrfs_node, ptrs) +
2267 sizeof(struct btrfs_key_ptr) * nr;
2268 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2271 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2275 ptr = offsetof(struct btrfs_node, ptrs) +
2276 sizeof(struct btrfs_key_ptr) * nr;
2277 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2280 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2282 return offsetof(struct btrfs_node, ptrs) +
2283 sizeof(struct btrfs_key_ptr) * nr;
2286 void btrfs_node_key(struct extent_buffer *eb,
2287 struct btrfs_disk_key *disk_key, int nr);
2289 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2290 struct btrfs_disk_key *disk_key, int nr)
2293 ptr = btrfs_node_key_ptr_offset(nr);
2294 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2295 struct btrfs_key_ptr, key, disk_key);
2298 /* struct btrfs_item */
2299 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2300 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2302 static inline unsigned long btrfs_item_nr_offset(int nr)
2304 return offsetof(struct btrfs_leaf, items) +
2305 sizeof(struct btrfs_item) * nr;
2308 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
2311 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2314 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2315 struct btrfs_item *item)
2317 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2320 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2322 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
2325 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2327 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
2330 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2332 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
2335 static inline void btrfs_item_key(struct extent_buffer *eb,
2336 struct btrfs_disk_key *disk_key, int nr)
2338 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2339 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2342 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2343 struct btrfs_disk_key *disk_key, int nr)
2345 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2346 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2349 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2352 * struct btrfs_root_ref
2354 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2355 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2356 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2358 /* struct btrfs_dir_item */
2359 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2360 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2361 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2362 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2364 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2365 struct btrfs_dir_item *item,
2366 struct btrfs_disk_key *key)
2368 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2371 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2372 struct btrfs_dir_item *item,
2373 struct btrfs_disk_key *key)
2375 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2378 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2380 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2382 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2385 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2386 struct btrfs_free_space_header *h,
2387 struct btrfs_disk_key *key)
2389 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2392 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2393 struct btrfs_free_space_header *h,
2394 struct btrfs_disk_key *key)
2396 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2399 /* struct btrfs_disk_key */
2400 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2402 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2403 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2405 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2406 struct btrfs_disk_key *disk)
2408 cpu->offset = le64_to_cpu(disk->offset);
2409 cpu->type = disk->type;
2410 cpu->objectid = le64_to_cpu(disk->objectid);
2413 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2414 struct btrfs_key *cpu)
2416 disk->offset = cpu_to_le64(cpu->offset);
2417 disk->type = cpu->type;
2418 disk->objectid = cpu_to_le64(cpu->objectid);
2421 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2422 struct btrfs_key *key, int nr)
2424 struct btrfs_disk_key disk_key;
2425 btrfs_node_key(eb, &disk_key, nr);
2426 btrfs_disk_key_to_cpu(key, &disk_key);
2429 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2430 struct btrfs_key *key, int nr)
2432 struct btrfs_disk_key disk_key;
2433 btrfs_item_key(eb, &disk_key, nr);
2434 btrfs_disk_key_to_cpu(key, &disk_key);
2437 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2438 struct btrfs_dir_item *item,
2439 struct btrfs_key *key)
2441 struct btrfs_disk_key disk_key;
2442 btrfs_dir_item_key(eb, item, &disk_key);
2443 btrfs_disk_key_to_cpu(key, &disk_key);
2447 static inline u8 btrfs_key_type(struct btrfs_key *key)
2452 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2457 /* struct btrfs_header */
2458 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2459 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2461 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2462 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2463 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2464 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2466 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2468 return (btrfs_header_flags(eb) & flag) == flag;
2471 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2473 u64 flags = btrfs_header_flags(eb);
2474 btrfs_set_header_flags(eb, flags | flag);
2475 return (flags & flag) == flag;
2478 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2480 u64 flags = btrfs_header_flags(eb);
2481 btrfs_set_header_flags(eb, flags & ~flag);
2482 return (flags & flag) == flag;
2485 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2487 u64 flags = btrfs_header_flags(eb);
2488 return flags >> BTRFS_BACKREF_REV_SHIFT;
2491 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2494 u64 flags = btrfs_header_flags(eb);
2495 flags &= ~BTRFS_BACKREF_REV_MASK;
2496 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2497 btrfs_set_header_flags(eb, flags);
2500 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
2502 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2506 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2508 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2512 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2514 return btrfs_header_level(eb) == 0;
2517 /* struct btrfs_root_item */
2518 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2520 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2521 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2522 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2524 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2526 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2527 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2528 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2529 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2530 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2531 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2532 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2533 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2535 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2537 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2539 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2541 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2543 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2546 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2548 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2551 /* struct btrfs_root_backup */
2552 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2554 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2556 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2557 tree_root_level, 8);
2559 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2561 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2562 chunk_root_gen, 64);
2563 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2564 chunk_root_level, 8);
2566 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2568 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2569 extent_root_gen, 64);
2570 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2571 extent_root_level, 8);
2573 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2575 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2577 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2580 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2582 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2584 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2587 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2589 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2591 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2592 csum_root_level, 8);
2593 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2595 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2597 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2600 /* struct btrfs_balance_item */
2601 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2603 static inline void btrfs_balance_data(struct extent_buffer *eb,
2604 struct btrfs_balance_item *bi,
2605 struct btrfs_disk_balance_args *ba)
2607 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2610 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2611 struct btrfs_balance_item *bi,
2612 struct btrfs_disk_balance_args *ba)
2614 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2617 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2618 struct btrfs_balance_item *bi,
2619 struct btrfs_disk_balance_args *ba)
2621 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2624 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2625 struct btrfs_balance_item *bi,
2626 struct btrfs_disk_balance_args *ba)
2628 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2631 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2632 struct btrfs_balance_item *bi,
2633 struct btrfs_disk_balance_args *ba)
2635 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2638 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2639 struct btrfs_balance_item *bi,
2640 struct btrfs_disk_balance_args *ba)
2642 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2646 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2647 struct btrfs_disk_balance_args *disk)
2649 memset(cpu, 0, sizeof(*cpu));
2651 cpu->profiles = le64_to_cpu(disk->profiles);
2652 cpu->usage = le64_to_cpu(disk->usage);
2653 cpu->devid = le64_to_cpu(disk->devid);
2654 cpu->pstart = le64_to_cpu(disk->pstart);
2655 cpu->pend = le64_to_cpu(disk->pend);
2656 cpu->vstart = le64_to_cpu(disk->vstart);
2657 cpu->vend = le64_to_cpu(disk->vend);
2658 cpu->target = le64_to_cpu(disk->target);
2659 cpu->flags = le64_to_cpu(disk->flags);
2663 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2664 struct btrfs_balance_args *cpu)
2666 memset(disk, 0, sizeof(*disk));
2668 disk->profiles = cpu_to_le64(cpu->profiles);
2669 disk->usage = cpu_to_le64(cpu->usage);
2670 disk->devid = cpu_to_le64(cpu->devid);
2671 disk->pstart = cpu_to_le64(cpu->pstart);
2672 disk->pend = cpu_to_le64(cpu->pend);
2673 disk->vstart = cpu_to_le64(cpu->vstart);
2674 disk->vend = cpu_to_le64(cpu->vend);
2675 disk->target = cpu_to_le64(cpu->target);
2676 disk->flags = cpu_to_le64(cpu->flags);
2679 /* struct btrfs_super_block */
2680 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2681 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2682 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2684 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2685 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2686 struct btrfs_super_block, sys_chunk_array_size, 32);
2687 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2688 struct btrfs_super_block, chunk_root_generation, 64);
2689 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2691 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2693 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2694 chunk_root_level, 8);
2695 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2697 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2698 log_root_transid, 64);
2699 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2701 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2703 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2705 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2707 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2709 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2711 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2713 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2714 root_dir_objectid, 64);
2715 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2717 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2719 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2720 compat_ro_flags, 64);
2721 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2722 incompat_flags, 64);
2723 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2725 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2726 cache_generation, 64);
2728 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2730 int t = btrfs_super_csum_type(s);
2731 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2732 return btrfs_csum_sizes[t];
2735 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2737 return offsetof(struct btrfs_leaf, items);
2740 /* struct btrfs_file_extent_item */
2741 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2743 static inline unsigned long
2744 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2746 unsigned long offset = (unsigned long)e;
2747 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2751 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2753 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2756 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2758 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2760 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2761 disk_num_bytes, 64);
2762 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2764 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2766 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2768 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2770 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2772 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2773 other_encoding, 16);
2775 /* this returns the number of file bytes represented by the inline item.
2776 * If an item is compressed, this is the uncompressed size
2778 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2779 struct btrfs_file_extent_item *e)
2781 return btrfs_file_extent_ram_bytes(eb, e);
2785 * this returns the number of bytes used by the item on disk, minus the
2786 * size of any extent headers. If a file is compressed on disk, this is
2787 * the compressed size
2789 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2790 struct btrfs_item *e)
2792 unsigned long offset;
2793 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2794 return btrfs_item_size(eb, e) - offset;
2797 /* btrfs_dev_stats_item */
2798 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2799 struct btrfs_dev_stats_item *ptr,
2804 read_extent_buffer(eb, &val,
2805 offsetof(struct btrfs_dev_stats_item, values) +
2806 ((unsigned long)ptr) + (index * sizeof(u64)),
2811 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2812 struct btrfs_dev_stats_item *ptr,
2815 write_extent_buffer(eb, &val,
2816 offsetof(struct btrfs_dev_stats_item, values) +
2817 ((unsigned long)ptr) + (index * sizeof(u64)),
2821 /* btrfs_qgroup_status_item */
2822 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2824 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2826 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2828 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2831 /* btrfs_qgroup_info_item */
2832 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2834 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2835 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2837 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2838 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2841 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2842 struct btrfs_qgroup_info_item, generation, 64);
2843 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2845 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2846 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2847 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2849 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2850 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2852 /* btrfs_qgroup_limit_item */
2853 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2855 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2857 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2859 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2861 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2864 /* btrfs_dev_replace_item */
2865 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2866 struct btrfs_dev_replace_item, src_devid, 64);
2867 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2868 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2870 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2872 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2874 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2876 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2877 num_write_errors, 64);
2878 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2879 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2881 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2883 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2886 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2887 struct btrfs_dev_replace_item, src_devid, 64);
2888 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2889 struct btrfs_dev_replace_item,
2890 cont_reading_from_srcdev_mode, 64);
2891 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2892 struct btrfs_dev_replace_item, replace_state, 64);
2893 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2894 struct btrfs_dev_replace_item, time_started, 64);
2895 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2896 struct btrfs_dev_replace_item, time_stopped, 64);
2897 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2898 struct btrfs_dev_replace_item, num_write_errors, 64);
2899 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2900 struct btrfs_dev_replace_item,
2901 num_uncorrectable_read_errors, 64);
2902 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2903 struct btrfs_dev_replace_item, cursor_left, 64);
2904 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2905 struct btrfs_dev_replace_item, cursor_right, 64);
2907 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
2909 return sb->s_fs_info;
2912 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2915 return root->leafsize;
2916 return root->nodesize;
2919 /* helper function to cast into the data area of the leaf. */
2920 #define btrfs_item_ptr(leaf, slot, type) \
2921 ((type *)(btrfs_leaf_data(leaf) + \
2922 btrfs_item_offset_nr(leaf, slot)))
2924 #define btrfs_item_ptr_offset(leaf, slot) \
2925 ((unsigned long)(btrfs_leaf_data(leaf) + \
2926 btrfs_item_offset_nr(leaf, slot)))
2928 static inline struct dentry *fdentry(struct file *file)
2930 return file->f_path.dentry;
2933 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2935 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2936 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2939 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2941 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2945 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2948 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2953 * Doing a truncate won't result in new nodes or leaves, just what we need for
2956 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2959 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2963 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2964 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2965 struct btrfs_root *root, unsigned long count);
2966 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2967 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2968 struct btrfs_root *root, u64 bytenr,
2969 u64 num_bytes, u64 *refs, u64 *flags);
2970 int btrfs_pin_extent(struct btrfs_root *root,
2971 u64 bytenr, u64 num, int reserved);
2972 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2973 struct btrfs_root *root,
2974 u64 bytenr, u64 num_bytes);
2975 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2976 struct btrfs_root *root,
2977 u64 objectid, u64 offset, u64 bytenr);
2978 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2979 struct btrfs_fs_info *info,
2981 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2982 u64 btrfs_find_block_group(struct btrfs_root *root,
2983 u64 search_start, u64 search_hint, int owner);
2984 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2985 struct btrfs_root *root, u32 blocksize,
2986 u64 parent, u64 root_objectid,
2987 struct btrfs_disk_key *key, int level,
2988 u64 hint, u64 empty_size);
2989 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2990 struct btrfs_root *root,
2991 struct extent_buffer *buf,
2992 u64 parent, int last_ref);
2993 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2994 struct btrfs_root *root,
2995 u64 bytenr, u32 blocksize,
2997 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2998 struct btrfs_root *root,
2999 u64 root_objectid, u64 owner,
3000 u64 offset, struct btrfs_key *ins);
3001 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3002 struct btrfs_root *root,
3003 u64 root_objectid, u64 owner, u64 offset,
3004 struct btrfs_key *ins);
3005 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
3006 struct btrfs_root *root,
3007 u64 num_bytes, u64 min_alloc_size,
3008 u64 empty_size, u64 hint_byte,
3009 struct btrfs_key *ins, u64 data);
3010 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3011 struct extent_buffer *buf, int full_backref, int for_cow);
3012 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3013 struct extent_buffer *buf, int full_backref, int for_cow);
3014 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3015 struct btrfs_root *root,
3016 u64 bytenr, u64 num_bytes, u64 flags,
3018 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3019 struct btrfs_root *root,
3020 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3021 u64 owner, u64 offset, int for_cow);
3023 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
3024 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3025 u64 start, u64 len);
3026 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3027 struct btrfs_root *root);
3028 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3029 struct btrfs_root *root);
3030 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3031 struct btrfs_root *root,
3032 u64 bytenr, u64 num_bytes, u64 parent,
3033 u64 root_objectid, u64 owner, u64 offset, int for_cow);
3035 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3036 struct btrfs_root *root);
3037 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3038 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3039 int btrfs_read_block_groups(struct btrfs_root *root);
3040 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3041 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3042 struct btrfs_root *root, u64 bytes_used,
3043 u64 type, u64 chunk_objectid, u64 chunk_offset,
3045 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3046 struct btrfs_root *root, u64 group_start);
3047 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3048 struct btrfs_root *root);
3049 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
3050 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3051 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3053 enum btrfs_reserve_flush_enum {
3054 /* If we are in the transaction, we can't flush anything.*/
3055 BTRFS_RESERVE_NO_FLUSH,
3057 * Flushing delalloc may cause deadlock somewhere, in this
3058 * case, use FLUSH LIMIT
3060 BTRFS_RESERVE_FLUSH_LIMIT,
3061 BTRFS_RESERVE_FLUSH_ALL,
3064 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
3065 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3066 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3067 struct btrfs_root *root);
3068 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3069 struct inode *inode);
3070 void btrfs_orphan_release_metadata(struct inode *inode);
3071 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
3072 struct btrfs_pending_snapshot *pending);
3073 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3074 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3075 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3076 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3077 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3078 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3079 unsigned short type);
3080 void btrfs_free_block_rsv(struct btrfs_root *root,
3081 struct btrfs_block_rsv *rsv);
3082 int btrfs_block_rsv_add(struct btrfs_root *root,
3083 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3084 enum btrfs_reserve_flush_enum flush);
3085 int btrfs_block_rsv_check(struct btrfs_root *root,
3086 struct btrfs_block_rsv *block_rsv, int min_factor);
3087 int btrfs_block_rsv_refill(struct btrfs_root *root,
3088 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3089 enum btrfs_reserve_flush_enum flush);
3090 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3091 struct btrfs_block_rsv *dst_rsv,
3093 void btrfs_block_rsv_release(struct btrfs_root *root,
3094 struct btrfs_block_rsv *block_rsv,
3096 int btrfs_set_block_group_ro(struct btrfs_root *root,
3097 struct btrfs_block_group_cache *cache);
3098 void btrfs_set_block_group_rw(struct btrfs_root *root,
3099 struct btrfs_block_group_cache *cache);
3100 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3101 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3102 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3103 u64 start, u64 end);
3104 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
3105 u64 num_bytes, u64 *actual_bytes);
3106 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3107 struct btrfs_root *root, u64 type);
3108 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3110 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3111 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3112 struct btrfs_fs_info *fs_info);
3113 int __get_raid_index(u64 flags);
3115 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3116 int level, int *slot);
3117 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3118 int btrfs_previous_item(struct btrfs_root *root,
3119 struct btrfs_path *path, u64 min_objectid,
3121 void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
3122 struct btrfs_root *root, struct btrfs_path *path,
3123 struct btrfs_key *new_key);
3124 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3125 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3126 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3127 struct btrfs_key *key, int lowest_level,
3128 int cache_only, u64 min_trans);
3129 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3130 struct btrfs_key *max_key,
3131 struct btrfs_path *path, int cache_only,
3133 enum btrfs_compare_tree_result {
3134 BTRFS_COMPARE_TREE_NEW,
3135 BTRFS_COMPARE_TREE_DELETED,
3136 BTRFS_COMPARE_TREE_CHANGED,
3138 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3139 struct btrfs_root *right_root,
3140 struct btrfs_path *left_path,
3141 struct btrfs_path *right_path,
3142 struct btrfs_key *key,
3143 enum btrfs_compare_tree_result result,
3145 int btrfs_compare_trees(struct btrfs_root *left_root,
3146 struct btrfs_root *right_root,
3147 btrfs_changed_cb_t cb, void *ctx);
3148 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3149 struct btrfs_root *root, struct extent_buffer *buf,
3150 struct extent_buffer *parent, int parent_slot,
3151 struct extent_buffer **cow_ret);
3152 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3153 struct btrfs_root *root,
3154 struct extent_buffer *buf,
3155 struct extent_buffer **cow_ret, u64 new_root_objectid);
3156 int btrfs_block_can_be_shared(struct btrfs_root *root,
3157 struct extent_buffer *buf);
3158 void btrfs_extend_item(struct btrfs_trans_handle *trans,
3159 struct btrfs_root *root, struct btrfs_path *path,
3161 void btrfs_truncate_item(struct btrfs_trans_handle *trans,
3162 struct btrfs_root *root,
3163 struct btrfs_path *path,
3164 u32 new_size, int from_end);
3165 int btrfs_split_item(struct btrfs_trans_handle *trans,
3166 struct btrfs_root *root,
3167 struct btrfs_path *path,
3168 struct btrfs_key *new_key,
3169 unsigned long split_offset);
3170 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3171 struct btrfs_root *root,
3172 struct btrfs_path *path,
3173 struct btrfs_key *new_key);
3174 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3175 *root, struct btrfs_key *key, struct btrfs_path *p, int
3177 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3178 struct btrfs_path *p, u64 time_seq);
3179 int btrfs_search_slot_for_read(struct btrfs_root *root,
3180 struct btrfs_key *key, struct btrfs_path *p,
3181 int find_higher, int return_any);
3182 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3183 struct btrfs_root *root, struct extent_buffer *parent,
3184 int start_slot, int cache_only, u64 *last_ret,
3185 struct btrfs_key *progress);
3186 void btrfs_release_path(struct btrfs_path *p);
3187 struct btrfs_path *btrfs_alloc_path(void);
3188 void btrfs_free_path(struct btrfs_path *p);
3189 void btrfs_set_path_blocking(struct btrfs_path *p);
3190 void btrfs_clear_path_blocking(struct btrfs_path *p,
3191 struct extent_buffer *held, int held_rw);
3192 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3194 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3195 struct btrfs_path *path, int slot, int nr);
3196 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3197 struct btrfs_root *root,
3198 struct btrfs_path *path)
3200 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3203 void setup_items_for_insert(struct btrfs_trans_handle *trans,
3204 struct btrfs_root *root, struct btrfs_path *path,
3205 struct btrfs_key *cpu_key, u32 *data_size,
3206 u32 total_data, u32 total_size, int nr);
3207 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3208 *root, struct btrfs_key *key, void *data, u32 data_size);
3209 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3210 struct btrfs_root *root,
3211 struct btrfs_path *path,
3212 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3214 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3215 struct btrfs_root *root,
3216 struct btrfs_path *path,
3217 struct btrfs_key *key,
3220 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3223 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3224 int btrfs_next_leaf_write(struct btrfs_trans_handle *trans,
3225 struct btrfs_root *root, struct btrfs_path *path,
3227 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3229 static inline int btrfs_next_old_item(struct btrfs_root *root,
3230 struct btrfs_path *p, u64 time_seq)
3233 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3234 return btrfs_next_old_leaf(root, p, time_seq);
3237 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3239 return btrfs_next_old_item(root, p, 0);
3241 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3242 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3243 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3244 struct btrfs_block_rsv *block_rsv,
3245 int update_ref, int for_reloc);
3246 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3247 struct btrfs_root *root,
3248 struct extent_buffer *node,
3249 struct extent_buffer *parent);
3250 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3253 * Get synced with close_ctree()
3256 return fs_info->closing;
3258 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3260 kfree(fs_info->balance_ctl);
3261 kfree(fs_info->delayed_root);
3262 kfree(fs_info->extent_root);
3263 kfree(fs_info->tree_root);
3264 kfree(fs_info->chunk_root);
3265 kfree(fs_info->dev_root);
3266 kfree(fs_info->csum_root);
3267 kfree(fs_info->quota_root);
3268 kfree(fs_info->super_copy);
3269 kfree(fs_info->super_for_commit);
3273 /* tree mod log functions from ctree.c */
3274 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3275 struct seq_list *elem);
3276 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3277 struct seq_list *elem);
3278 static inline u64 btrfs_inc_tree_mod_seq(struct btrfs_fs_info *fs_info)
3280 return atomic_inc_return(&fs_info->tree_mod_seq);
3282 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3285 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3286 struct btrfs_path *path,
3287 u64 root_id, u64 ref_id);
3288 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3289 struct btrfs_root *tree_root,
3290 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3291 const char *name, int name_len);
3292 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3293 struct btrfs_root *tree_root,
3294 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3295 const char *name, int name_len);
3296 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3297 struct btrfs_key *key);
3298 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3299 *root, struct btrfs_key *key, struct btrfs_root_item
3301 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3302 struct btrfs_root *root,
3303 struct btrfs_key *key,
3304 struct btrfs_root_item *item);
3305 void btrfs_read_root_item(struct btrfs_root *root,
3306 struct extent_buffer *eb, int slot,
3307 struct btrfs_root_item *item);
3308 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
3309 btrfs_root_item *item, struct btrfs_key *key);
3310 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
3311 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3312 void btrfs_set_root_node(struct btrfs_root_item *item,
3313 struct extent_buffer *node);
3314 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3315 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3316 struct btrfs_root *root);
3319 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3320 const char *name, int name_len);
3321 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3322 struct btrfs_root *root, const char *name,
3323 int name_len, struct inode *dir,
3324 struct btrfs_key *location, u8 type, u64 index);
3325 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3326 struct btrfs_root *root,
3327 struct btrfs_path *path, u64 dir,
3328 const char *name, int name_len,
3330 struct btrfs_dir_item *
3331 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3332 struct btrfs_root *root,
3333 struct btrfs_path *path, u64 dir,
3334 u64 objectid, const char *name, int name_len,
3336 struct btrfs_dir_item *
3337 btrfs_search_dir_index_item(struct btrfs_root *root,
3338 struct btrfs_path *path, u64 dirid,
3339 const char *name, int name_len);
3340 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3341 struct btrfs_path *path,
3342 const char *name, int name_len);
3343 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3344 struct btrfs_root *root,
3345 struct btrfs_path *path,
3346 struct btrfs_dir_item *di);
3347 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3348 struct btrfs_root *root,
3349 struct btrfs_path *path, u64 objectid,
3350 const char *name, u16 name_len,
3351 const void *data, u16 data_len);
3352 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3353 struct btrfs_root *root,
3354 struct btrfs_path *path, u64 dir,
3355 const char *name, u16 name_len,
3357 int verify_dir_item(struct btrfs_root *root,
3358 struct extent_buffer *leaf,
3359 struct btrfs_dir_item *dir_item);
3362 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3363 struct btrfs_root *root, u64 offset);
3364 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3365 struct btrfs_root *root, u64 offset);
3366 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3369 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3370 struct btrfs_root *root,
3371 const char *name, int name_len,
3372 u64 inode_objectid, u64 ref_objectid, u64 index);
3373 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3374 struct btrfs_root *root,
3375 const char *name, int name_len,
3376 u64 inode_objectid, u64 ref_objectid, u64 *index);
3377 int btrfs_get_inode_ref_index(struct btrfs_trans_handle *trans,
3378 struct btrfs_root *root,
3379 struct btrfs_path *path,
3380 const char *name, int name_len,
3381 u64 inode_objectid, u64 ref_objectid, int mod,
3383 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3384 struct btrfs_root *root,
3385 struct btrfs_path *path, u64 objectid);
3386 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3387 *root, struct btrfs_path *path,
3388 struct btrfs_key *location, int mod);
3390 struct btrfs_inode_extref *
3391 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3392 struct btrfs_root *root,
3393 struct btrfs_path *path,
3394 const char *name, int name_len,
3395 u64 inode_objectid, u64 ref_objectid, int ins_len,
3398 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3399 u64 ref_objectid, const char *name,
3401 struct btrfs_inode_extref **extref_ret);
3404 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3405 struct btrfs_root *root, u64 bytenr, u64 len);
3406 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3407 struct bio *bio, u32 *dst);
3408 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3409 struct bio *bio, u64 logical_offset);
3410 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3411 struct btrfs_root *root,
3412 u64 objectid, u64 pos,
3413 u64 disk_offset, u64 disk_num_bytes,
3414 u64 num_bytes, u64 offset, u64 ram_bytes,
3415 u8 compression, u8 encryption, u16 other_encoding);
3416 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3417 struct btrfs_root *root,
3418 struct btrfs_path *path, u64 objectid,
3419 u64 bytenr, int mod);
3420 u64 btrfs_file_extent_length(struct btrfs_path *path);
3421 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3422 struct btrfs_root *root,
3423 struct btrfs_ordered_sum *sums);
3424 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3425 struct bio *bio, u64 file_start, int contig);
3426 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
3427 struct btrfs_root *root,
3428 struct btrfs_path *path,
3429 u64 bytenr, int cow);
3430 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
3431 struct btrfs_root *root, struct btrfs_path *path,
3433 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3434 struct list_head *list, int search_commit);
3436 struct btrfs_delalloc_work {
3437 struct inode *inode;
3440 struct completion completion;
3441 struct list_head list;
3442 struct btrfs_work work;
3445 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3446 int wait, int delay_iput);
3447 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3449 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3450 size_t pg_offset, u64 start, u64 len,
3453 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3454 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3455 #define ClearPageChecked ClearPageFsMisc
3456 #define SetPageChecked SetPageFsMisc
3457 #define PageChecked PageFsMisc
3460 /* This forces readahead on a given range of bytes in an inode */
3461 static inline void btrfs_force_ra(struct address_space *mapping,
3462 struct file_ra_state *ra, struct file *file,
3463 pgoff_t offset, unsigned long req_size)
3465 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3468 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3469 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3470 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3471 struct btrfs_root *root,
3472 struct inode *dir, struct inode *inode,
3473 const char *name, int name_len);
3474 int btrfs_add_link(struct btrfs_trans_handle *trans,
3475 struct inode *parent_inode, struct inode *inode,
3476 const char *name, int name_len, int add_backref, u64 index);
3477 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3478 struct btrfs_root *root,
3479 struct inode *dir, u64 objectid,
3480 const char *name, int name_len);
3481 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3483 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3484 struct btrfs_root *root,
3485 struct inode *inode, u64 new_size,
3488 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3489 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3490 struct extent_state **cached_state);
3491 int btrfs_writepages(struct address_space *mapping,
3492 struct writeback_control *wbc);
3493 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3494 struct btrfs_root *new_root, u64 new_dirid);
3495 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3496 size_t size, struct bio *bio,
3497 unsigned long bio_flags);
3498 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3499 int btrfs_readpage(struct file *file, struct page *page);
3500 void btrfs_evict_inode(struct inode *inode);
3501 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3502 int btrfs_dirty_inode(struct inode *inode);
3503 struct inode *btrfs_alloc_inode(struct super_block *sb);
3504 void btrfs_destroy_inode(struct inode *inode);
3505 int btrfs_drop_inode(struct inode *inode);
3506 int btrfs_init_cachep(void);
3507 void btrfs_destroy_cachep(void);
3508 long btrfs_ioctl_trans_end(struct file *file);
3509 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3510 struct btrfs_root *root, int *was_new);
3511 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3512 size_t pg_offset, u64 start, u64 end,
3514 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3515 struct btrfs_root *root,
3516 struct inode *inode);
3517 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3518 struct btrfs_root *root, struct inode *inode);
3519 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3520 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
3521 int btrfs_orphan_cleanup(struct btrfs_root *root);
3522 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3523 struct btrfs_root *root);
3524 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3525 void btrfs_invalidate_inodes(struct btrfs_root *root);
3526 void btrfs_add_delayed_iput(struct inode *inode);
3527 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3528 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3529 u64 start, u64 num_bytes, u64 min_size,
3530 loff_t actual_len, u64 *alloc_hint);
3531 int btrfs_prealloc_file_range_trans(struct inode *inode,
3532 struct btrfs_trans_handle *trans, int mode,
3533 u64 start, u64 num_bytes, u64 min_size,
3534 loff_t actual_len, u64 *alloc_hint);
3535 extern const struct dentry_operations btrfs_dentry_operations;
3538 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3539 void btrfs_update_iflags(struct inode *inode);
3540 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3541 int btrfs_defrag_file(struct inode *inode, struct file *file,
3542 struct btrfs_ioctl_defrag_range_args *range,
3543 u64 newer_than, unsigned long max_pages);
3544 void btrfs_get_block_group_info(struct list_head *groups_list,
3545 struct btrfs_ioctl_space_info *space);
3548 int btrfs_auto_defrag_init(void);
3549 void btrfs_auto_defrag_exit(void);
3550 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3551 struct inode *inode);
3552 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3553 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3554 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3555 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3557 int btrfs_replace_extent_cache(struct inode *inode, struct extent_map *replace,
3558 u64 start, u64 end, int skip_pinned,
3560 extern const struct file_operations btrfs_file_operations;
3561 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3562 struct btrfs_root *root, struct inode *inode,
3563 struct btrfs_path *path, u64 start, u64 end,
3564 u64 *drop_end, int drop_cache);
3565 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3566 struct btrfs_root *root, struct inode *inode, u64 start,
3567 u64 end, int drop_cache);
3568 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3569 struct inode *inode, u64 start, u64 end);
3570 int btrfs_release_file(struct inode *inode, struct file *file);
3571 void btrfs_drop_pages(struct page **pages, size_t num_pages);
3572 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3573 struct page **pages, size_t num_pages,
3574 loff_t pos, size_t write_bytes,
3575 struct extent_state **cached);
3578 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3579 struct btrfs_root *root, int cache_only);
3582 int btrfs_init_sysfs(void);
3583 void btrfs_exit_sysfs(void);
3586 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3589 int btrfs_parse_options(struct btrfs_root *root, char *options);
3590 int btrfs_sync_fs(struct super_block *sb, int wait);
3592 #ifdef CONFIG_PRINTK
3594 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
3596 static inline __printf(2, 3)
3597 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...)
3603 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3604 unsigned int line, int errno, const char *fmt, ...);
3607 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3608 struct btrfs_root *root, const char *function,
3609 unsigned int line, int errno);
3611 #define btrfs_set_fs_incompat(__fs_info, opt) \
3612 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3614 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3617 struct btrfs_super_block *disk_super;
3620 disk_super = fs_info->super_copy;
3621 features = btrfs_super_incompat_flags(disk_super);
3622 if (!(features & flag)) {
3624 btrfs_set_super_incompat_flags(disk_super, features);
3629 * Call btrfs_abort_transaction as early as possible when an error condition is
3630 * detected, that way the exact line number is reported.
3633 #define btrfs_abort_transaction(trans, root, errno) \
3635 __btrfs_abort_transaction(trans, root, __func__, \
3639 #define btrfs_std_error(fs_info, errno) \
3642 __btrfs_std_error((fs_info), __func__, \
3643 __LINE__, (errno), NULL); \
3646 #define btrfs_error(fs_info, errno, fmt, args...) \
3648 __btrfs_std_error((fs_info), __func__, __LINE__, \
3649 (errno), fmt, ##args); \
3653 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3654 unsigned int line, int errno, const char *fmt, ...);
3656 #define btrfs_panic(fs_info, errno, fmt, args...) \
3658 struct btrfs_fs_info *_i = (fs_info); \
3659 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3660 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
3664 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3665 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3666 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3667 struct inode *inode, struct inode *dir);
3668 int btrfs_acl_chmod(struct inode *inode);
3670 #define btrfs_get_acl NULL
3671 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3672 struct inode *inode, struct inode *dir)
3676 static inline int btrfs_acl_chmod(struct inode *inode)
3683 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3684 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3685 struct btrfs_root *root);
3686 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3687 struct btrfs_root *root);
3688 int btrfs_recover_relocation(struct btrfs_root *root);
3689 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3690 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3691 struct btrfs_root *root, struct extent_buffer *buf,
3692 struct extent_buffer *cow);
3693 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3694 struct btrfs_pending_snapshot *pending,
3695 u64 *bytes_to_reserve);
3696 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3697 struct btrfs_pending_snapshot *pending);
3700 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3701 u64 end, struct btrfs_scrub_progress *progress,
3702 int readonly, int is_dev_replace);
3703 void btrfs_scrub_pause(struct btrfs_root *root);
3704 void btrfs_scrub_pause_super(struct btrfs_root *root);
3705 void btrfs_scrub_continue(struct btrfs_root *root);
3706 void btrfs_scrub_continue_super(struct btrfs_root *root);
3707 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3708 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3709 struct btrfs_device *dev);
3710 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
3711 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3712 struct btrfs_scrub_progress *progress);
3715 struct reada_control {
3716 struct btrfs_root *root; /* tree to prefetch */
3717 struct btrfs_key key_start;
3718 struct btrfs_key key_end; /* exclusive */
3721 wait_queue_head_t wait;
3723 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3724 struct btrfs_key *start, struct btrfs_key *end);
3725 int btrfs_reada_wait(void *handle);
3726 void btrfs_reada_detach(void *handle);
3727 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3728 u64 start, int err);
3731 struct qgroup_update {
3732 struct list_head list;
3733 struct btrfs_delayed_ref_node *node;
3734 struct btrfs_delayed_extent_op *extent_op;
3737 int btrfs_quota_enable(struct btrfs_trans_handle *trans,
3738 struct btrfs_fs_info *fs_info);
3739 int btrfs_quota_disable(struct btrfs_trans_handle *trans,
3740 struct btrfs_fs_info *fs_info);
3741 int btrfs_quota_rescan(struct btrfs_fs_info *fs_info);
3742 int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
3743 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3744 int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
3745 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3746 int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
3747 struct btrfs_fs_info *fs_info, u64 qgroupid,
3749 int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
3750 struct btrfs_fs_info *fs_info, u64 qgroupid);
3751 int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
3752 struct btrfs_fs_info *fs_info, u64 qgroupid,
3753 struct btrfs_qgroup_limit *limit);
3754 int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
3755 void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
3756 struct btrfs_delayed_extent_op;
3757 int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
3758 struct btrfs_delayed_ref_node *node,
3759 struct btrfs_delayed_extent_op *extent_op);
3760 int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
3761 struct btrfs_fs_info *fs_info,
3762 struct btrfs_delayed_ref_node *node,
3763 struct btrfs_delayed_extent_op *extent_op);
3764 int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
3765 struct btrfs_fs_info *fs_info);
3766 int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
3767 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
3768 struct btrfs_qgroup_inherit *inherit);
3769 int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
3770 void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
3772 void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
3774 static inline int is_fstree(u64 rootid)
3776 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3777 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)