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 <linux/btrfs.h>
35 #include "extent_io.h"
36 #include "extent_map.h"
37 #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 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
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))
194 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
197 * The key defines the order in the tree, and so it also defines (optimal)
200 * objectid corresponds to the inode number.
202 * type tells us things about the object, and is a kind of stream selector.
203 * so for a given inode, keys with type of 1 might refer to the inode data,
204 * type of 2 may point to file data in the btree and type == 3 may point to
207 * offset is the starting byte offset for this key in the stream.
209 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
210 * in cpu native order. Otherwise they are identical and their sizes
211 * should be the same (ie both packed)
213 struct btrfs_disk_key {
217 } __attribute__ ((__packed__));
223 } __attribute__ ((__packed__));
225 struct btrfs_mapping_tree {
226 struct extent_map_tree map_tree;
229 struct btrfs_dev_item {
230 /* the internal btrfs device id */
233 /* size of the device */
239 /* optimal io alignment for this device */
242 /* optimal io width for this device */
245 /* minimal io size for this device */
248 /* type and info about this device */
251 /* expected generation for this device */
255 * starting byte of this partition on the device,
256 * to allow for stripe alignment in the future
260 /* grouping information for allocation decisions */
263 /* seek speed 0-100 where 100 is fastest */
266 /* bandwidth 0-100 where 100 is fastest */
269 /* btrfs generated uuid for this device */
270 u8 uuid[BTRFS_UUID_SIZE];
272 /* uuid of FS who owns this device */
273 u8 fsid[BTRFS_UUID_SIZE];
274 } __attribute__ ((__packed__));
276 struct btrfs_stripe {
279 u8 dev_uuid[BTRFS_UUID_SIZE];
280 } __attribute__ ((__packed__));
283 /* size of this chunk in bytes */
286 /* objectid of the root referencing this chunk */
292 /* optimal io alignment for this chunk */
295 /* optimal io width for this chunk */
298 /* minimal io size for this chunk */
301 /* 2^16 stripes is quite a lot, a second limit is the size of a single
306 /* sub stripes only matter for raid10 */
308 struct btrfs_stripe stripe;
309 /* additional stripes go here */
310 } __attribute__ ((__packed__));
312 #define BTRFS_FREE_SPACE_EXTENT 1
313 #define BTRFS_FREE_SPACE_BITMAP 2
315 struct btrfs_free_space_entry {
319 } __attribute__ ((__packed__));
321 struct btrfs_free_space_header {
322 struct btrfs_disk_key location;
326 } __attribute__ ((__packed__));
328 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
330 BUG_ON(num_stripes == 0);
331 return sizeof(struct btrfs_chunk) +
332 sizeof(struct btrfs_stripe) * (num_stripes - 1);
335 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
336 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
341 #define BTRFS_FS_STATE_ERROR 0
343 /* Super block flags */
344 /* Errors detected */
345 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
347 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
348 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
350 #define BTRFS_BACKREF_REV_MAX 256
351 #define BTRFS_BACKREF_REV_SHIFT 56
352 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
353 BTRFS_BACKREF_REV_SHIFT)
355 #define BTRFS_OLD_BACKREF_REV 0
356 #define BTRFS_MIXED_BACKREF_REV 1
359 * every tree block (leaf or node) starts with this header.
361 struct btrfs_header {
362 /* these first four must match the super block */
363 u8 csum[BTRFS_CSUM_SIZE];
364 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
365 __le64 bytenr; /* which block this node is supposed to live in */
368 /* allowed to be different from the super from here on down */
369 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
374 } __attribute__ ((__packed__));
376 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
377 sizeof(struct btrfs_header)) / \
378 sizeof(struct btrfs_key_ptr))
379 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
380 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
381 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
382 sizeof(struct btrfs_item) - \
383 sizeof(struct btrfs_file_extent_item))
384 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
385 sizeof(struct btrfs_item) -\
386 sizeof(struct btrfs_dir_item))
390 * this is a very generous portion of the super block, giving us
391 * room to translate 14 chunks with 3 stripes each.
393 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
394 #define BTRFS_LABEL_SIZE 256
397 * just in case we somehow lose the roots and are not able to mount,
398 * we store an array of the roots from previous transactions
401 #define BTRFS_NUM_BACKUP_ROOTS 4
402 struct btrfs_root_backup {
404 __le64 tree_root_gen;
407 __le64 chunk_root_gen;
410 __le64 extent_root_gen;
419 __le64 csum_root_gen;
429 u8 extent_root_level;
433 /* future and to align */
435 } __attribute__ ((__packed__));
438 * the super block basically lists the main trees of the FS
439 * it currently lacks any block count etc etc
441 struct btrfs_super_block {
442 u8 csum[BTRFS_CSUM_SIZE];
443 /* the first 4 fields must match struct btrfs_header */
444 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
445 __le64 bytenr; /* this block number */
448 /* allowed to be different from the btrfs_header from here own down */
455 /* this will help find the new super based on the log root */
456 __le64 log_root_transid;
459 __le64 root_dir_objectid;
465 __le32 sys_chunk_array_size;
466 __le64 chunk_root_generation;
468 __le64 compat_ro_flags;
469 __le64 incompat_flags;
474 struct btrfs_dev_item dev_item;
476 char label[BTRFS_LABEL_SIZE];
478 __le64 cache_generation;
480 /* future expansion */
482 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
483 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
484 } __attribute__ ((__packed__));
487 * Compat flags that we support. If any incompat flags are set other than the
488 * ones specified below then we will fail to mount
490 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
491 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
492 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
493 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
495 * some patches floated around with a second compression method
496 * lets save that incompat here for when they do get in
497 * Note we don't actually support it, we're just reserving the
500 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
503 * older kernels tried to do bigger metadata blocks, but the
504 * code was pretty buggy. Lets not let them try anymore.
506 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
508 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
510 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
511 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
512 #define BTRFS_FEATURE_INCOMPAT_SUPP \
513 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
514 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
515 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
516 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
517 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
518 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
521 * A leaf is full of items. offset and size tell us where to find
522 * the item in the leaf (relative to the start of the data area)
525 struct btrfs_disk_key key;
528 } __attribute__ ((__packed__));
531 * leaves have an item area and a data area:
532 * [item0, item1....itemN] [free space] [dataN...data1, data0]
534 * The data is separate from the items to get the keys closer together
538 struct btrfs_header header;
539 struct btrfs_item items[];
540 } __attribute__ ((__packed__));
543 * all non-leaf blocks are nodes, they hold only keys and pointers to
546 struct btrfs_key_ptr {
547 struct btrfs_disk_key key;
550 } __attribute__ ((__packed__));
553 struct btrfs_header header;
554 struct btrfs_key_ptr ptrs[];
555 } __attribute__ ((__packed__));
558 * btrfs_paths remember the path taken from the root down to the leaf.
559 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
560 * to any other levels that are present.
562 * The slots array records the index of the item or block pointer
563 * used while walking the tree.
566 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
567 int slots[BTRFS_MAX_LEVEL];
568 /* if there is real range locking, this locks field will change */
569 int locks[BTRFS_MAX_LEVEL];
571 /* keep some upper locks as we walk down */
575 * set by btrfs_split_item, tells search_slot to keep all locks
576 * and to force calls to keep space in the nodes
578 unsigned int search_for_split:1;
579 unsigned int keep_locks:1;
580 unsigned int skip_locking:1;
581 unsigned int leave_spinning:1;
582 unsigned int search_commit_root:1;
583 unsigned int really_keep_locks:1;
587 * items in the extent btree are used to record the objectid of the
588 * owner of the block and the number of references
591 struct btrfs_extent_item {
595 } __attribute__ ((__packed__));
597 struct btrfs_extent_item_v0 {
599 } __attribute__ ((__packed__));
601 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
602 sizeof(struct btrfs_item))
604 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
605 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
607 /* following flags only apply to tree blocks */
609 /* use full backrefs for extent pointers in the block */
610 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
613 * this flag is only used internally by scrub and may be changed at any time
614 * it is only declared here to avoid collisions
616 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
618 struct btrfs_tree_block_info {
619 struct btrfs_disk_key key;
621 } __attribute__ ((__packed__));
623 struct btrfs_extent_data_ref {
628 } __attribute__ ((__packed__));
630 struct btrfs_shared_data_ref {
632 } __attribute__ ((__packed__));
634 struct btrfs_extent_inline_ref {
637 } __attribute__ ((__packed__));
639 /* old style backrefs item */
640 struct btrfs_extent_ref_v0 {
645 } __attribute__ ((__packed__));
648 /* dev extents record free space on individual devices. The owner
649 * field points back to the chunk allocation mapping tree that allocated
650 * the extent. The chunk tree uuid field is a way to double check the owner
652 struct btrfs_dev_extent {
654 __le64 chunk_objectid;
657 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
658 } __attribute__ ((__packed__));
660 struct btrfs_inode_ref {
664 } __attribute__ ((__packed__));
666 struct btrfs_inode_extref {
667 __le64 parent_objectid;
672 } __attribute__ ((__packed__));
674 struct btrfs_timespec {
677 } __attribute__ ((__packed__));
679 enum btrfs_compression_type {
680 BTRFS_COMPRESS_NONE = 0,
681 BTRFS_COMPRESS_ZLIB = 1,
682 BTRFS_COMPRESS_LZO = 2,
683 BTRFS_COMPRESS_TYPES = 2,
684 BTRFS_COMPRESS_LAST = 3,
687 struct btrfs_inode_item {
688 /* nfs style generation number */
690 /* transid that last touched this inode */
702 /* modification sequence number for NFS */
706 * a little future expansion, for more than this we can
707 * just grow the inode item and version it
710 struct btrfs_timespec atime;
711 struct btrfs_timespec ctime;
712 struct btrfs_timespec mtime;
713 struct btrfs_timespec otime;
714 } __attribute__ ((__packed__));
716 struct btrfs_dir_log_item {
718 } __attribute__ ((__packed__));
720 struct btrfs_dir_item {
721 struct btrfs_disk_key location;
726 } __attribute__ ((__packed__));
728 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
730 struct btrfs_root_item {
731 struct btrfs_inode_item inode;
737 __le64 last_snapshot;
740 struct btrfs_disk_key drop_progress;
745 * The following fields appear after subvol_uuids+subvol_times
750 * This generation number is used to test if the new fields are valid
751 * and up to date while reading the root item. Everytime the root item
752 * is written out, the "generation" field is copied into this field. If
753 * anyone ever mounted the fs with an older kernel, we will have
754 * mismatching generation values here and thus must invalidate the
755 * new fields. See btrfs_update_root and btrfs_find_last_root for
757 * the offset of generation_v2 is also used as the start for the memset
758 * when invalidating the fields.
760 __le64 generation_v2;
761 u8 uuid[BTRFS_UUID_SIZE];
762 u8 parent_uuid[BTRFS_UUID_SIZE];
763 u8 received_uuid[BTRFS_UUID_SIZE];
764 __le64 ctransid; /* updated when an inode changes */
765 __le64 otransid; /* trans when created */
766 __le64 stransid; /* trans when sent. non-zero for received subvol */
767 __le64 rtransid; /* trans when received. non-zero for received subvol */
768 struct btrfs_timespec ctime;
769 struct btrfs_timespec otime;
770 struct btrfs_timespec stime;
771 struct btrfs_timespec rtime;
772 __le64 reserved[8]; /* for future */
773 } __attribute__ ((__packed__));
776 * this is used for both forward and backward root refs
778 struct btrfs_root_ref {
782 } __attribute__ ((__packed__));
784 struct btrfs_disk_balance_args {
786 * profiles to operate on, single is denoted by
787 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
797 /* devid subset filter [pstart..pend) */
801 /* btrfs virtual address space subset filter [vstart..vend) */
806 * profile to convert to, single is denoted by
807 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
811 /* BTRFS_BALANCE_ARGS_* */
815 } __attribute__ ((__packed__));
818 * store balance parameters to disk so that balance can be properly
819 * resumed after crash or unmount
821 struct btrfs_balance_item {
822 /* BTRFS_BALANCE_* */
825 struct btrfs_disk_balance_args data;
826 struct btrfs_disk_balance_args meta;
827 struct btrfs_disk_balance_args sys;
830 } __attribute__ ((__packed__));
832 #define BTRFS_FILE_EXTENT_INLINE 0
833 #define BTRFS_FILE_EXTENT_REG 1
834 #define BTRFS_FILE_EXTENT_PREALLOC 2
836 struct btrfs_file_extent_item {
838 * transaction id that created this extent
842 * max number of bytes to hold this extent in ram
843 * when we split a compressed extent we can't know how big
844 * each of the resulting pieces will be. So, this is
845 * an upper limit on the size of the extent in ram instead of
851 * 32 bits for the various ways we might encode the data,
852 * including compression and encryption. If any of these
853 * are set to something a given disk format doesn't understand
854 * it is treated like an incompat flag for reading and writing,
859 __le16 other_encoding; /* spare for later use */
861 /* are we inline data or a real extent? */
865 * disk space consumed by the extent, checksum blocks are included
869 __le64 disk_num_bytes;
871 * the logical offset in file blocks (no csums)
872 * this extent record is for. This allows a file extent to point
873 * into the middle of an existing extent on disk, sharing it
874 * between two snapshots (useful if some bytes in the middle of the
875 * extent have changed
879 * the logical number of file blocks (no csums included). This
880 * always reflects the size uncompressed and without encoding.
884 } __attribute__ ((__packed__));
886 struct btrfs_csum_item {
888 } __attribute__ ((__packed__));
890 struct btrfs_dev_stats_item {
892 * grow this item struct at the end for future enhancements and keep
893 * the existing values unchanged
895 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
896 } __attribute__ ((__packed__));
898 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
899 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
900 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
901 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
902 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
903 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
904 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
906 struct btrfs_dev_replace {
907 u64 replace_state; /* see #define above */
908 u64 time_started; /* seconds since 1-Jan-1970 */
909 u64 time_stopped; /* seconds since 1-Jan-1970 */
910 atomic64_t num_write_errors;
911 atomic64_t num_uncorrectable_read_errors;
914 u64 committed_cursor_left;
915 u64 cursor_left_last_write_of_item;
918 u64 cont_reading_from_srcdev_mode; /* see #define above */
921 int item_needs_writeback;
922 struct btrfs_device *srcdev;
923 struct btrfs_device *tgtdev;
926 atomic_t nesting_level;
927 struct mutex lock_finishing_cancel_unmount;
928 struct mutex lock_management_lock;
931 struct btrfs_scrub_progress scrub_progress;
934 struct btrfs_dev_replace_item {
936 * grow this item struct at the end for future enhancements and keep
937 * the existing values unchanged
942 __le64 cont_reading_from_srcdev_mode;
944 __le64 replace_state;
947 __le64 num_write_errors;
948 __le64 num_uncorrectable_read_errors;
949 } __attribute__ ((__packed__));
951 /* different types of block groups (and chunks) */
952 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
953 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
954 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
955 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
956 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
957 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
958 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
959 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
961 enum btrfs_raid_types {
970 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
971 BTRFS_BLOCK_GROUP_SYSTEM | \
972 BTRFS_BLOCK_GROUP_METADATA)
974 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
975 BTRFS_BLOCK_GROUP_RAID1 | \
976 BTRFS_BLOCK_GROUP_DUP | \
977 BTRFS_BLOCK_GROUP_RAID10)
979 * We need a bit for restriper to be able to tell when chunks of type
980 * SINGLE are available. This "extended" profile format is used in
981 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
982 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
983 * to avoid remappings between two formats in future.
985 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
987 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
988 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
990 static inline u64 chunk_to_extended(u64 flags)
992 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
993 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
997 static inline u64 extended_to_chunk(u64 flags)
999 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1002 struct btrfs_block_group_item {
1004 __le64 chunk_objectid;
1006 } __attribute__ ((__packed__));
1009 * is subvolume quota turned on?
1011 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1013 * SCANNING is set during the initialization phase
1015 #define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
1017 * Some qgroup entries are known to be out of date,
1018 * either because the configuration has changed in a way that
1019 * makes a rescan necessary, or because the fs has been mounted
1020 * with a non-qgroup-aware version.
1021 * Turning qouta off and on again makes it inconsistent, too.
1023 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1025 #define BTRFS_QGROUP_STATUS_VERSION 1
1027 struct btrfs_qgroup_status_item {
1030 * the generation is updated during every commit. As older
1031 * versions of btrfs are not aware of qgroups, it will be
1032 * possible to detect inconsistencies by checking the
1033 * generation on mount time
1037 /* flag definitions see above */
1041 * only used during scanning to record the progress
1042 * of the scan. It contains a logical address
1045 } __attribute__ ((__packed__));
1047 struct btrfs_qgroup_info_item {
1053 } __attribute__ ((__packed__));
1055 /* flags definition for qgroup limits */
1056 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1057 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1058 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1059 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1060 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1061 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1063 struct btrfs_qgroup_limit_item {
1065 * only updated when any of the other values change
1072 } __attribute__ ((__packed__));
1074 struct btrfs_space_info {
1077 u64 total_bytes; /* total bytes in the space,
1078 this doesn't take mirrors into account */
1079 u64 bytes_used; /* total bytes used,
1080 this doesn't take mirrors into account */
1081 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1082 transaction finishes */
1083 u64 bytes_reserved; /* total bytes the allocator has reserved for
1084 current allocations */
1085 u64 bytes_readonly; /* total bytes that are read only */
1087 u64 bytes_may_use; /* number of bytes that may be used for
1088 delalloc/allocations */
1089 u64 disk_used; /* total bytes used on disk */
1090 u64 disk_total; /* total bytes on disk, takes mirrors into
1094 * we bump reservation progress every time we decrement
1095 * bytes_reserved. This way people waiting for reservations
1096 * know something good has happened and they can check
1097 * for progress. The number here isn't to be trusted, it
1098 * just shows reclaim activity
1100 unsigned long reservation_progress;
1102 unsigned int full:1; /* indicates that we cannot allocate any more
1103 chunks for this space */
1104 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1106 unsigned int flush:1; /* set if we are trying to make space */
1108 unsigned int force_alloc; /* set if we need to force a chunk
1109 alloc for this space */
1111 struct list_head list;
1113 /* for block groups in our same type */
1114 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1116 struct rw_semaphore groups_sem;
1117 wait_queue_head_t wait;
1120 #define BTRFS_BLOCK_RSV_GLOBAL 1
1121 #define BTRFS_BLOCK_RSV_DELALLOC 2
1122 #define BTRFS_BLOCK_RSV_TRANS 3
1123 #define BTRFS_BLOCK_RSV_CHUNK 4
1124 #define BTRFS_BLOCK_RSV_DELOPS 5
1125 #define BTRFS_BLOCK_RSV_EMPTY 6
1126 #define BTRFS_BLOCK_RSV_TEMP 7
1128 struct btrfs_block_rsv {
1131 struct btrfs_space_info *space_info;
1133 unsigned short full;
1134 unsigned short type;
1135 unsigned short failfast;
1139 * free clusters are used to claim free space in relatively large chunks,
1140 * allowing us to do less seeky writes. They are used for all metadata
1141 * allocations and data allocations in ssd mode.
1143 struct btrfs_free_cluster {
1145 spinlock_t refill_lock;
1146 struct rb_root root;
1148 /* largest extent in this cluster */
1151 /* first extent starting offset */
1154 struct btrfs_block_group_cache *block_group;
1156 * when a cluster is allocated from a block group, we put the
1157 * cluster onto a list in the block group so that it can
1158 * be freed before the block group is freed.
1160 struct list_head block_group_list;
1163 enum btrfs_caching_type {
1165 BTRFS_CACHE_STARTED = 1,
1166 BTRFS_CACHE_FAST = 2,
1167 BTRFS_CACHE_FINISHED = 3,
1170 enum btrfs_disk_cache_state {
1171 BTRFS_DC_WRITTEN = 0,
1175 BTRFS_DC_NEED_WRITE = 4,
1178 struct btrfs_caching_control {
1179 struct list_head list;
1181 wait_queue_head_t wait;
1182 struct btrfs_work work;
1183 struct btrfs_block_group_cache *block_group;
1188 struct btrfs_block_group_cache {
1189 struct btrfs_key key;
1190 struct btrfs_block_group_item item;
1191 struct btrfs_fs_info *fs_info;
1192 struct inode *inode;
1199 u64 cache_generation;
1201 unsigned int dirty:1;
1202 unsigned int iref:1;
1204 int disk_cache_state;
1206 /* cache tracking stuff */
1208 struct btrfs_caching_control *caching_ctl;
1209 u64 last_byte_to_unpin;
1211 struct btrfs_space_info *space_info;
1213 /* free space cache stuff */
1214 struct btrfs_free_space_ctl *free_space_ctl;
1216 /* block group cache stuff */
1217 struct rb_node cache_node;
1219 /* for block groups in the same raid type */
1220 struct list_head list;
1225 /* List of struct btrfs_free_clusters for this block group.
1226 * Today it will only have one thing on it, but that may change
1228 struct list_head cluster_list;
1230 /* For delayed block group creation */
1231 struct list_head new_bg_list;
1234 /* delayed seq elem */
1236 struct list_head list;
1240 enum btrfs_orphan_cleanup_state {
1241 ORPHAN_CLEANUP_STARTED = 1,
1242 ORPHAN_CLEANUP_DONE = 2,
1246 struct reloc_control;
1247 struct btrfs_device;
1248 struct btrfs_fs_devices;
1249 struct btrfs_balance_control;
1250 struct btrfs_delayed_root;
1251 struct btrfs_fs_info {
1252 u8 fsid[BTRFS_FSID_SIZE];
1253 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1254 struct btrfs_root *extent_root;
1255 struct btrfs_root *tree_root;
1256 struct btrfs_root *chunk_root;
1257 struct btrfs_root *dev_root;
1258 struct btrfs_root *fs_root;
1259 struct btrfs_root *csum_root;
1260 struct btrfs_root *quota_root;
1262 /* the log root tree is a directory of all the other log roots */
1263 struct btrfs_root *log_root_tree;
1265 spinlock_t fs_roots_radix_lock;
1266 struct radix_tree_root fs_roots_radix;
1268 /* block group cache stuff */
1269 spinlock_t block_group_cache_lock;
1270 u64 first_logical_byte;
1271 struct rb_root block_group_cache_tree;
1273 /* keep track of unallocated space */
1274 spinlock_t free_chunk_lock;
1275 u64 free_chunk_space;
1277 struct extent_io_tree freed_extents[2];
1278 struct extent_io_tree *pinned_extents;
1280 /* logical->physical extent mapping */
1281 struct btrfs_mapping_tree mapping_tree;
1284 * block reservation for extent, checksum, root tree and
1285 * delayed dir index item
1287 struct btrfs_block_rsv global_block_rsv;
1288 /* block reservation for delay allocation */
1289 struct btrfs_block_rsv delalloc_block_rsv;
1290 /* block reservation for metadata operations */
1291 struct btrfs_block_rsv trans_block_rsv;
1292 /* block reservation for chunk tree */
1293 struct btrfs_block_rsv chunk_block_rsv;
1294 /* block reservation for delayed operations */
1295 struct btrfs_block_rsv delayed_block_rsv;
1297 struct btrfs_block_rsv empty_block_rsv;
1300 u64 last_trans_committed;
1303 * this is updated to the current trans every time a full commit
1304 * is required instead of the faster short fsync log commits
1306 u64 last_trans_log_full_commit;
1307 unsigned long mount_opt;
1308 unsigned long compress_type:4;
1310 * It is a suggestive number, the read side is safe even it gets a
1311 * wrong number because we will write out the data into a regular
1312 * extent. The write side(mount/remount) is under ->s_umount lock,
1313 * so it is also safe.
1317 * Protected by ->chunk_mutex and sb->s_umount.
1319 * The reason that we use two lock to protect it is because only
1320 * remount and mount operations can change it and these two operations
1321 * are under sb->s_umount, but the read side (chunk allocation) can not
1322 * acquire sb->s_umount or the deadlock would happen. So we use two
1323 * locks to protect it. On the write side, we must acquire two locks,
1324 * and on the read side, we just need acquire one of them.
1327 struct btrfs_transaction *running_transaction;
1328 wait_queue_head_t transaction_throttle;
1329 wait_queue_head_t transaction_wait;
1330 wait_queue_head_t transaction_blocked_wait;
1331 wait_queue_head_t async_submit_wait;
1333 struct btrfs_super_block *super_copy;
1334 struct btrfs_super_block *super_for_commit;
1335 struct block_device *__bdev;
1336 struct super_block *sb;
1337 struct inode *btree_inode;
1338 struct backing_dev_info bdi;
1339 struct mutex tree_log_mutex;
1340 struct mutex transaction_kthread_mutex;
1341 struct mutex cleaner_mutex;
1342 struct mutex chunk_mutex;
1343 struct mutex volume_mutex;
1345 * this protects the ordered operations list only while we are
1346 * processing all of the entries on it. This way we make
1347 * sure the commit code doesn't find the list temporarily empty
1348 * because another function happens to be doing non-waiting preflush
1349 * before jumping into the main commit.
1351 struct mutex ordered_operations_mutex;
1352 struct rw_semaphore extent_commit_sem;
1354 struct rw_semaphore cleanup_work_sem;
1356 struct rw_semaphore subvol_sem;
1357 struct srcu_struct subvol_srcu;
1359 spinlock_t trans_lock;
1361 * the reloc mutex goes with the trans lock, it is taken
1362 * during commit to protect us from the relocation code
1364 struct mutex reloc_mutex;
1366 struct list_head trans_list;
1367 struct list_head dead_roots;
1368 struct list_head caching_block_groups;
1370 spinlock_t delayed_iput_lock;
1371 struct list_head delayed_iputs;
1373 /* this protects tree_mod_seq_list */
1374 spinlock_t tree_mod_seq_lock;
1375 atomic_t tree_mod_seq;
1376 struct list_head tree_mod_seq_list;
1377 struct seq_list tree_mod_seq_elem;
1379 /* this protects tree_mod_log */
1380 rwlock_t tree_mod_log_lock;
1381 struct rb_root tree_mod_log;
1383 atomic_t nr_async_submits;
1384 atomic_t async_submit_draining;
1385 atomic_t nr_async_bios;
1386 atomic_t async_delalloc_pages;
1387 atomic_t open_ioctl_trans;
1390 * this is used by the balancing code to wait for all the pending
1393 spinlock_t ordered_extent_lock;
1396 * all of the data=ordered extents pending writeback
1397 * these can span multiple transactions and basically include
1398 * every dirty data page that isn't from nodatacow
1400 struct list_head ordered_extents;
1402 spinlock_t delalloc_lock;
1404 * all of the inodes that have delalloc bytes. It is possible for
1405 * this list to be empty even when there is still dirty data=ordered
1406 * extents waiting to finish IO.
1408 struct list_head delalloc_inodes;
1411 * there is a pool of worker threads for checksumming during writes
1412 * and a pool for checksumming after reads. This is because readers
1413 * can run with FS locks held, and the writers may be waiting for
1414 * those locks. We don't want ordering in the pending list to cause
1415 * deadlocks, and so the two are serviced separately.
1417 * A third pool does submit_bio to avoid deadlocking with the other
1420 struct btrfs_workers generic_worker;
1421 struct btrfs_workers workers;
1422 struct btrfs_workers delalloc_workers;
1423 struct btrfs_workers flush_workers;
1424 struct btrfs_workers endio_workers;
1425 struct btrfs_workers endio_meta_workers;
1426 struct btrfs_workers endio_meta_write_workers;
1427 struct btrfs_workers endio_write_workers;
1428 struct btrfs_workers endio_freespace_worker;
1429 struct btrfs_workers submit_workers;
1430 struct btrfs_workers caching_workers;
1431 struct btrfs_workers readahead_workers;
1434 * fixup workers take dirty pages that didn't properly go through
1435 * the cow mechanism and make them safe to write. It happens
1436 * for the sys_munmap function call path
1438 struct btrfs_workers fixup_workers;
1439 struct btrfs_workers delayed_workers;
1440 struct task_struct *transaction_kthread;
1441 struct task_struct *cleaner_kthread;
1442 int thread_pool_size;
1444 struct kobject super_kobj;
1445 struct completion kobj_unregister;
1448 int log_root_recovering;
1454 /* used to keep from writing metadata until there is a nice batch */
1455 struct percpu_counter dirty_metadata_bytes;
1456 struct percpu_counter delalloc_bytes;
1457 s32 dirty_metadata_batch;
1460 struct list_head dirty_cowonly_roots;
1462 struct btrfs_fs_devices *fs_devices;
1465 * the space_info list is almost entirely read only. It only changes
1466 * when we add a new raid type to the FS, and that happens
1467 * very rarely. RCU is used to protect it.
1469 struct list_head space_info;
1471 struct btrfs_space_info *data_sinfo;
1473 struct reloc_control *reloc_ctl;
1475 /* data_alloc_cluster is only used in ssd mode */
1476 struct btrfs_free_cluster data_alloc_cluster;
1478 /* all metadata allocations go through this cluster */
1479 struct btrfs_free_cluster meta_alloc_cluster;
1481 /* auto defrag inodes go here */
1482 spinlock_t defrag_inodes_lock;
1483 struct rb_root defrag_inodes;
1484 atomic_t defrag_running;
1486 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1487 seqlock_t profiles_lock;
1489 * these three are in extended format (availability of single
1490 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1491 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1493 u64 avail_data_alloc_bits;
1494 u64 avail_metadata_alloc_bits;
1495 u64 avail_system_alloc_bits;
1497 /* restriper state */
1498 spinlock_t balance_lock;
1499 struct mutex balance_mutex;
1500 atomic_t balance_running;
1501 atomic_t balance_pause_req;
1502 atomic_t balance_cancel_req;
1503 struct btrfs_balance_control *balance_ctl;
1504 wait_queue_head_t balance_wait_q;
1506 unsigned data_chunk_allocations;
1507 unsigned metadata_ratio;
1511 /* private scrub information */
1512 struct mutex scrub_lock;
1513 atomic_t scrubs_running;
1514 atomic_t scrub_pause_req;
1515 atomic_t scrubs_paused;
1516 atomic_t scrub_cancel_req;
1517 wait_queue_head_t scrub_pause_wait;
1518 struct rw_semaphore scrub_super_lock;
1519 int scrub_workers_refcnt;
1520 struct btrfs_workers scrub_workers;
1521 struct btrfs_workers scrub_wr_completion_workers;
1522 struct btrfs_workers scrub_nocow_workers;
1524 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1525 u32 check_integrity_print_mask;
1530 unsigned int quota_enabled:1;
1533 * quota_enabled only changes state after a commit. This holds the
1536 unsigned int pending_quota_state:1;
1538 /* is qgroup tracking in a consistent state? */
1541 /* holds configuration and tracking. Protected by qgroup_lock */
1542 struct rb_root qgroup_tree;
1543 spinlock_t qgroup_lock;
1545 /* list of dirty qgroups to be written at next commit */
1546 struct list_head dirty_qgroups;
1548 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1551 /* filesystem state */
1552 unsigned long fs_state;
1554 struct btrfs_delayed_root *delayed_root;
1556 /* readahead tree */
1557 spinlock_t reada_lock;
1558 struct radix_tree_root reada_tree;
1560 /* next backup root to be overwritten */
1561 int backup_root_index;
1563 int num_tolerated_disk_barrier_failures;
1565 /* device replace state */
1566 struct btrfs_dev_replace dev_replace;
1568 atomic_t mutually_exclusive_operation_running;
1572 * in ram representation of the tree. extent_root is used for all allocations
1573 * and for the extent tree extent_root root.
1576 struct extent_buffer *node;
1578 struct extent_buffer *commit_root;
1579 struct btrfs_root *log_root;
1580 struct btrfs_root *reloc_root;
1582 struct btrfs_root_item root_item;
1583 struct btrfs_key root_key;
1584 struct btrfs_fs_info *fs_info;
1585 struct extent_io_tree dirty_log_pages;
1587 struct kobject root_kobj;
1588 struct completion kobj_unregister;
1589 struct mutex objectid_mutex;
1591 spinlock_t accounting_lock;
1592 struct btrfs_block_rsv *block_rsv;
1594 /* free ino cache stuff */
1595 struct mutex fs_commit_mutex;
1596 struct btrfs_free_space_ctl *free_ino_ctl;
1597 enum btrfs_caching_type cached;
1598 spinlock_t cache_lock;
1599 wait_queue_head_t cache_wait;
1600 struct btrfs_free_space_ctl *free_ino_pinned;
1602 struct inode *cache_inode;
1604 struct mutex log_mutex;
1605 wait_queue_head_t log_writer_wait;
1606 wait_queue_head_t log_commit_wait[2];
1607 atomic_t log_writers;
1608 atomic_t log_commit[2];
1610 unsigned long log_transid;
1611 unsigned long last_log_commit;
1612 pid_t log_start_pid;
1613 bool log_multiple_pids;
1618 /* data allocations are done in sectorsize units */
1621 /* node allocations are done in nodesize units */
1624 /* leaf allocations are done in leafsize units */
1631 u64 highest_objectid;
1633 /* btrfs_record_root_in_trans is a multi-step process,
1634 * and it can race with the balancing code. But the
1635 * race is very small, and only the first time the root
1636 * is added to each transaction. So in_trans_setup
1637 * is used to tell us when more checks are required
1639 unsigned long in_trans_setup;
1644 u64 defrag_trans_start;
1645 struct btrfs_key defrag_progress;
1646 struct btrfs_key defrag_max;
1650 /* the dirty list is only used by non-reference counted roots */
1651 struct list_head dirty_list;
1653 struct list_head root_list;
1655 spinlock_t log_extents_lock[2];
1656 struct list_head logged_list[2];
1658 spinlock_t orphan_lock;
1659 atomic_t orphan_inodes;
1660 struct btrfs_block_rsv *orphan_block_rsv;
1661 int orphan_item_inserted;
1662 int orphan_cleanup_state;
1664 spinlock_t inode_lock;
1665 /* red-black tree that keeps track of in-memory inodes */
1666 struct rb_root inode_tree;
1669 * radix tree that keeps track of delayed nodes of every inode,
1670 * protected by inode_lock
1672 struct radix_tree_root delayed_nodes_tree;
1674 * right now this just gets used so that a root has its own devid
1675 * for stat. It may be used for more later
1681 spinlock_t root_item_lock;
1684 struct btrfs_ioctl_defrag_range_args {
1685 /* start of the defrag operation */
1688 /* number of bytes to defrag, use (u64)-1 to say all */
1692 * flags for the operation, which can include turning
1693 * on compression for this one defrag
1698 * any extent bigger than this will be considered
1699 * already defragged. Use 0 to take the kernel default
1700 * Use 1 to say every single extent must be rewritten
1702 __u32 extent_thresh;
1705 * which compression method to use if turning on compression
1706 * for this defrag operation. If unspecified, zlib will
1709 __u32 compress_type;
1711 /* spare for later */
1717 * inode items have the data typically returned from stat and store other
1718 * info about object characteristics. There is one for every file and dir in
1721 #define BTRFS_INODE_ITEM_KEY 1
1722 #define BTRFS_INODE_REF_KEY 12
1723 #define BTRFS_INODE_EXTREF_KEY 13
1724 #define BTRFS_XATTR_ITEM_KEY 24
1725 #define BTRFS_ORPHAN_ITEM_KEY 48
1726 /* reserve 2-15 close to the inode for later flexibility */
1729 * dir items are the name -> inode pointers in a directory. There is one
1730 * for every name in a directory.
1732 #define BTRFS_DIR_LOG_ITEM_KEY 60
1733 #define BTRFS_DIR_LOG_INDEX_KEY 72
1734 #define BTRFS_DIR_ITEM_KEY 84
1735 #define BTRFS_DIR_INDEX_KEY 96
1737 * extent data is for file data
1739 #define BTRFS_EXTENT_DATA_KEY 108
1742 * extent csums are stored in a separate tree and hold csums for
1743 * an entire extent on disk.
1745 #define BTRFS_EXTENT_CSUM_KEY 128
1748 * root items point to tree roots. They are typically in the root
1749 * tree used by the super block to find all the other trees
1751 #define BTRFS_ROOT_ITEM_KEY 132
1754 * root backrefs tie subvols and snapshots to the directory entries that
1757 #define BTRFS_ROOT_BACKREF_KEY 144
1760 * root refs make a fast index for listing all of the snapshots and
1761 * subvolumes referenced by a given root. They point directly to the
1762 * directory item in the root that references the subvol
1764 #define BTRFS_ROOT_REF_KEY 156
1767 * extent items are in the extent map tree. These record which blocks
1768 * are used, and how many references there are to each block
1770 #define BTRFS_EXTENT_ITEM_KEY 168
1772 #define BTRFS_TREE_BLOCK_REF_KEY 176
1774 #define BTRFS_EXTENT_DATA_REF_KEY 178
1776 #define BTRFS_EXTENT_REF_V0_KEY 180
1778 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1780 #define BTRFS_SHARED_DATA_REF_KEY 184
1783 * block groups give us hints into the extent allocation trees. Which
1784 * blocks are free etc etc
1786 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1788 #define BTRFS_DEV_EXTENT_KEY 204
1789 #define BTRFS_DEV_ITEM_KEY 216
1790 #define BTRFS_CHUNK_ITEM_KEY 228
1793 * Records the overall state of the qgroups.
1794 * There's only one instance of this key present,
1795 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1797 #define BTRFS_QGROUP_STATUS_KEY 240
1799 * Records the currently used space of the qgroup.
1800 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1802 #define BTRFS_QGROUP_INFO_KEY 242
1804 * Contains the user configured limits for the qgroup.
1805 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1807 #define BTRFS_QGROUP_LIMIT_KEY 244
1809 * Records the child-parent relationship of qgroups. For
1810 * each relation, 2 keys are present:
1811 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1812 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1814 #define BTRFS_QGROUP_RELATION_KEY 246
1816 #define BTRFS_BALANCE_ITEM_KEY 248
1819 * Persistantly stores the io stats in the device tree.
1820 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1822 #define BTRFS_DEV_STATS_KEY 249
1825 * Persistantly stores the device replace state in the device tree.
1826 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1828 #define BTRFS_DEV_REPLACE_KEY 250
1831 * string items are for debugging. They just store a short string of
1834 #define BTRFS_STRING_ITEM_KEY 253
1837 * Flags for mount options.
1839 * Note: don't forget to add new options to btrfs_show_options()
1841 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1842 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1843 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1844 #define BTRFS_MOUNT_SSD (1 << 3)
1845 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1846 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1847 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1848 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1849 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1850 #define BTRFS_MOUNT_NOSSD (1 << 9)
1851 #define BTRFS_MOUNT_DISCARD (1 << 10)
1852 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1853 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1854 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1855 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1856 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1857 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1858 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1859 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1860 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1861 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1862 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1863 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1865 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1866 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1867 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1872 #define BTRFS_INODE_NODATASUM (1 << 0)
1873 #define BTRFS_INODE_NODATACOW (1 << 1)
1874 #define BTRFS_INODE_READONLY (1 << 2)
1875 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1876 #define BTRFS_INODE_PREALLOC (1 << 4)
1877 #define BTRFS_INODE_SYNC (1 << 5)
1878 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1879 #define BTRFS_INODE_APPEND (1 << 7)
1880 #define BTRFS_INODE_NODUMP (1 << 8)
1881 #define BTRFS_INODE_NOATIME (1 << 9)
1882 #define BTRFS_INODE_DIRSYNC (1 << 10)
1883 #define BTRFS_INODE_COMPRESS (1 << 11)
1885 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1887 struct btrfs_map_token {
1888 struct extent_buffer *eb;
1890 unsigned long offset;
1893 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1895 token->kaddr = NULL;
1898 /* some macros to generate set/get funcs for the struct fields. This
1899 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1902 #define le8_to_cpu(v) (v)
1903 #define cpu_to_le8(v) (v)
1906 #define read_eb_member(eb, ptr, type, member, result) ( \
1907 read_extent_buffer(eb, (char *)(result), \
1908 ((unsigned long)(ptr)) + \
1909 offsetof(type, member), \
1910 sizeof(((type *)0)->member)))
1912 #define write_eb_member(eb, ptr, type, member, result) ( \
1913 write_extent_buffer(eb, (char *)(result), \
1914 ((unsigned long)(ptr)) + \
1915 offsetof(type, member), \
1916 sizeof(((type *)0)->member)))
1918 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1919 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1920 unsigned long off, \
1921 struct btrfs_map_token *token); \
1922 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1923 unsigned long off, u##bits val, \
1924 struct btrfs_map_token *token); \
1925 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1926 unsigned long off) \
1928 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1930 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1931 unsigned long off, u##bits val) \
1933 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1936 DECLARE_BTRFS_SETGET_BITS(8)
1937 DECLARE_BTRFS_SETGET_BITS(16)
1938 DECLARE_BTRFS_SETGET_BITS(32)
1939 DECLARE_BTRFS_SETGET_BITS(64)
1941 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1942 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1944 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1945 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1947 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1950 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1951 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1953 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1954 struct btrfs_map_token *token) \
1956 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1957 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1959 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1960 type *s, u##bits val, \
1961 struct btrfs_map_token *token) \
1963 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1964 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1967 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1968 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1970 type *p = page_address(eb->pages[0]); \
1971 u##bits res = le##bits##_to_cpu(p->member); \
1974 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1977 type *p = page_address(eb->pages[0]); \
1978 p->member = cpu_to_le##bits(val); \
1981 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1982 static inline u##bits btrfs_##name(type *s) \
1984 return le##bits##_to_cpu(s->member); \
1986 static inline void btrfs_set_##name(type *s, u##bits val) \
1988 s->member = cpu_to_le##bits(val); \
1991 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1992 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1993 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1994 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1995 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1996 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1998 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1999 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2000 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2001 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2002 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2003 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2005 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2006 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2008 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2010 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2012 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2014 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2016 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2017 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2019 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2021 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2023 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2026 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
2028 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
2031 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
2033 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
2036 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2037 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2038 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2039 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2040 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2041 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2042 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2043 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2044 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2045 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2046 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2048 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2050 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2053 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2054 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2055 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2057 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2059 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2061 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2063 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2064 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2066 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2068 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2069 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2071 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2074 unsigned long offset = (unsigned long)c;
2075 offset += offsetof(struct btrfs_chunk, stripe);
2076 offset += nr * sizeof(struct btrfs_stripe);
2077 return (struct btrfs_stripe *)offset;
2080 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2082 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2085 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2086 struct btrfs_chunk *c, int nr)
2088 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2091 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2092 struct btrfs_chunk *c, int nr)
2094 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2097 /* struct btrfs_block_group_item */
2098 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2100 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2102 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2103 struct btrfs_block_group_item, chunk_objectid, 64);
2105 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2106 struct btrfs_block_group_item, chunk_objectid, 64);
2107 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2108 struct btrfs_block_group_item, flags, 64);
2109 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2110 struct btrfs_block_group_item, flags, 64);
2112 /* struct btrfs_inode_ref */
2113 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2114 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2116 /* struct btrfs_inode_extref */
2117 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2118 parent_objectid, 64);
2119 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2121 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2123 /* struct btrfs_inode_item */
2124 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2125 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2126 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2127 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2128 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2129 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2130 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2131 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2132 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2133 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2134 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2135 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2137 static inline struct btrfs_timespec *
2138 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
2140 unsigned long ptr = (unsigned long)inode_item;
2141 ptr += offsetof(struct btrfs_inode_item, atime);
2142 return (struct btrfs_timespec *)ptr;
2145 static inline struct btrfs_timespec *
2146 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
2148 unsigned long ptr = (unsigned long)inode_item;
2149 ptr += offsetof(struct btrfs_inode_item, mtime);
2150 return (struct btrfs_timespec *)ptr;
2153 static inline struct btrfs_timespec *
2154 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
2156 unsigned long ptr = (unsigned long)inode_item;
2157 ptr += offsetof(struct btrfs_inode_item, ctime);
2158 return (struct btrfs_timespec *)ptr;
2161 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2162 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2164 /* struct btrfs_dev_extent */
2165 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2167 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2168 chunk_objectid, 64);
2169 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2171 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2173 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2175 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2176 return (u8 *)((unsigned long)dev + ptr);
2179 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2180 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2182 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2184 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2187 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2189 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2190 struct btrfs_tree_block_info *item,
2191 struct btrfs_disk_key *key)
2193 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2196 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2197 struct btrfs_tree_block_info *item,
2198 struct btrfs_disk_key *key)
2200 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2203 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2205 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2207 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2209 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2212 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2215 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2217 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2220 static inline u32 btrfs_extent_inline_ref_size(int type)
2222 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2223 type == BTRFS_SHARED_BLOCK_REF_KEY)
2224 return sizeof(struct btrfs_extent_inline_ref);
2225 if (type == BTRFS_SHARED_DATA_REF_KEY)
2226 return sizeof(struct btrfs_shared_data_ref) +
2227 sizeof(struct btrfs_extent_inline_ref);
2228 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2229 return sizeof(struct btrfs_extent_data_ref) +
2230 offsetof(struct btrfs_extent_inline_ref, offset);
2235 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2236 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2238 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2239 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2241 /* struct btrfs_node */
2242 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2243 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2245 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2248 ptr = offsetof(struct btrfs_node, ptrs) +
2249 sizeof(struct btrfs_key_ptr) * nr;
2250 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2253 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2257 ptr = offsetof(struct btrfs_node, ptrs) +
2258 sizeof(struct btrfs_key_ptr) * nr;
2259 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2262 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2265 ptr = offsetof(struct btrfs_node, ptrs) +
2266 sizeof(struct btrfs_key_ptr) * nr;
2267 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2270 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2274 ptr = offsetof(struct btrfs_node, ptrs) +
2275 sizeof(struct btrfs_key_ptr) * nr;
2276 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2279 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2281 return offsetof(struct btrfs_node, ptrs) +
2282 sizeof(struct btrfs_key_ptr) * nr;
2285 void btrfs_node_key(struct extent_buffer *eb,
2286 struct btrfs_disk_key *disk_key, int nr);
2288 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2289 struct btrfs_disk_key *disk_key, int nr)
2292 ptr = btrfs_node_key_ptr_offset(nr);
2293 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2294 struct btrfs_key_ptr, key, disk_key);
2297 /* struct btrfs_item */
2298 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2299 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2301 static inline unsigned long btrfs_item_nr_offset(int nr)
2303 return offsetof(struct btrfs_leaf, items) +
2304 sizeof(struct btrfs_item) * nr;
2307 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
2310 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2313 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2314 struct btrfs_item *item)
2316 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2319 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2321 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
2324 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2326 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
2329 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2331 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
2334 static inline void btrfs_item_key(struct extent_buffer *eb,
2335 struct btrfs_disk_key *disk_key, int nr)
2337 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2338 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2341 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2342 struct btrfs_disk_key *disk_key, int nr)
2344 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2345 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2348 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2351 * struct btrfs_root_ref
2353 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2354 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2355 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2357 /* struct btrfs_dir_item */
2358 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2359 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2360 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2361 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2363 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2364 struct btrfs_dir_item *item,
2365 struct btrfs_disk_key *key)
2367 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2370 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2371 struct btrfs_dir_item *item,
2372 struct btrfs_disk_key *key)
2374 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2377 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2379 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2381 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2384 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2385 struct btrfs_free_space_header *h,
2386 struct btrfs_disk_key *key)
2388 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2391 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2392 struct btrfs_free_space_header *h,
2393 struct btrfs_disk_key *key)
2395 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2398 /* struct btrfs_disk_key */
2399 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2401 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2402 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2404 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2405 struct btrfs_disk_key *disk)
2407 cpu->offset = le64_to_cpu(disk->offset);
2408 cpu->type = disk->type;
2409 cpu->objectid = le64_to_cpu(disk->objectid);
2412 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2413 struct btrfs_key *cpu)
2415 disk->offset = cpu_to_le64(cpu->offset);
2416 disk->type = cpu->type;
2417 disk->objectid = cpu_to_le64(cpu->objectid);
2420 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2421 struct btrfs_key *key, int nr)
2423 struct btrfs_disk_key disk_key;
2424 btrfs_node_key(eb, &disk_key, nr);
2425 btrfs_disk_key_to_cpu(key, &disk_key);
2428 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2429 struct btrfs_key *key, int nr)
2431 struct btrfs_disk_key disk_key;
2432 btrfs_item_key(eb, &disk_key, nr);
2433 btrfs_disk_key_to_cpu(key, &disk_key);
2436 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2437 struct btrfs_dir_item *item,
2438 struct btrfs_key *key)
2440 struct btrfs_disk_key disk_key;
2441 btrfs_dir_item_key(eb, item, &disk_key);
2442 btrfs_disk_key_to_cpu(key, &disk_key);
2446 static inline u8 btrfs_key_type(struct btrfs_key *key)
2451 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2456 /* struct btrfs_header */
2457 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2458 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2460 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2461 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2462 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2463 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2465 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2467 return (btrfs_header_flags(eb) & flag) == flag;
2470 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2472 u64 flags = btrfs_header_flags(eb);
2473 btrfs_set_header_flags(eb, flags | flag);
2474 return (flags & flag) == flag;
2477 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2479 u64 flags = btrfs_header_flags(eb);
2480 btrfs_set_header_flags(eb, flags & ~flag);
2481 return (flags & flag) == flag;
2484 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2486 u64 flags = btrfs_header_flags(eb);
2487 return flags >> BTRFS_BACKREF_REV_SHIFT;
2490 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2493 u64 flags = btrfs_header_flags(eb);
2494 flags &= ~BTRFS_BACKREF_REV_MASK;
2495 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2496 btrfs_set_header_flags(eb, flags);
2499 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
2501 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2505 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2507 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2511 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2513 return btrfs_header_level(eb) == 0;
2516 /* struct btrfs_root_item */
2517 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2519 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2520 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2521 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2523 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2525 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2526 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2527 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2528 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2529 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2530 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2531 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2532 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2534 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2536 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2538 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2540 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2542 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2545 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2547 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2550 /* struct btrfs_root_backup */
2551 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2553 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2555 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2556 tree_root_level, 8);
2558 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2560 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2561 chunk_root_gen, 64);
2562 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2563 chunk_root_level, 8);
2565 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2567 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2568 extent_root_gen, 64);
2569 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2570 extent_root_level, 8);
2572 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2574 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2576 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2579 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2581 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2583 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2586 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2588 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2590 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2591 csum_root_level, 8);
2592 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2594 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2596 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2599 /* struct btrfs_balance_item */
2600 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2602 static inline void btrfs_balance_data(struct extent_buffer *eb,
2603 struct btrfs_balance_item *bi,
2604 struct btrfs_disk_balance_args *ba)
2606 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2609 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2610 struct btrfs_balance_item *bi,
2611 struct btrfs_disk_balance_args *ba)
2613 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2616 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2617 struct btrfs_balance_item *bi,
2618 struct btrfs_disk_balance_args *ba)
2620 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2623 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2624 struct btrfs_balance_item *bi,
2625 struct btrfs_disk_balance_args *ba)
2627 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2630 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2631 struct btrfs_balance_item *bi,
2632 struct btrfs_disk_balance_args *ba)
2634 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2637 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2638 struct btrfs_balance_item *bi,
2639 struct btrfs_disk_balance_args *ba)
2641 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2645 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2646 struct btrfs_disk_balance_args *disk)
2648 memset(cpu, 0, sizeof(*cpu));
2650 cpu->profiles = le64_to_cpu(disk->profiles);
2651 cpu->usage = le64_to_cpu(disk->usage);
2652 cpu->devid = le64_to_cpu(disk->devid);
2653 cpu->pstart = le64_to_cpu(disk->pstart);
2654 cpu->pend = le64_to_cpu(disk->pend);
2655 cpu->vstart = le64_to_cpu(disk->vstart);
2656 cpu->vend = le64_to_cpu(disk->vend);
2657 cpu->target = le64_to_cpu(disk->target);
2658 cpu->flags = le64_to_cpu(disk->flags);
2662 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2663 struct btrfs_balance_args *cpu)
2665 memset(disk, 0, sizeof(*disk));
2667 disk->profiles = cpu_to_le64(cpu->profiles);
2668 disk->usage = cpu_to_le64(cpu->usage);
2669 disk->devid = cpu_to_le64(cpu->devid);
2670 disk->pstart = cpu_to_le64(cpu->pstart);
2671 disk->pend = cpu_to_le64(cpu->pend);
2672 disk->vstart = cpu_to_le64(cpu->vstart);
2673 disk->vend = cpu_to_le64(cpu->vend);
2674 disk->target = cpu_to_le64(cpu->target);
2675 disk->flags = cpu_to_le64(cpu->flags);
2678 /* struct btrfs_super_block */
2679 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2680 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2681 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2683 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2684 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2685 struct btrfs_super_block, sys_chunk_array_size, 32);
2686 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2687 struct btrfs_super_block, chunk_root_generation, 64);
2688 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2690 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2692 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2693 chunk_root_level, 8);
2694 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2696 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2697 log_root_transid, 64);
2698 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2700 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2702 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2704 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2706 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2708 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2710 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2712 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2713 root_dir_objectid, 64);
2714 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2716 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2718 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2719 compat_ro_flags, 64);
2720 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2721 incompat_flags, 64);
2722 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2724 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2725 cache_generation, 64);
2727 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2729 int t = btrfs_super_csum_type(s);
2730 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2731 return btrfs_csum_sizes[t];
2734 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2736 return offsetof(struct btrfs_leaf, items);
2739 /* struct btrfs_file_extent_item */
2740 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2742 static inline unsigned long
2743 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2745 unsigned long offset = (unsigned long)e;
2746 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2750 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2752 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2755 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2757 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2759 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2760 disk_num_bytes, 64);
2761 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2763 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2765 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2767 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2769 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2771 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2772 other_encoding, 16);
2774 /* this returns the number of file bytes represented by the inline item.
2775 * If an item is compressed, this is the uncompressed size
2777 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2778 struct btrfs_file_extent_item *e)
2780 return btrfs_file_extent_ram_bytes(eb, e);
2784 * this returns the number of bytes used by the item on disk, minus the
2785 * size of any extent headers. If a file is compressed on disk, this is
2786 * the compressed size
2788 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2789 struct btrfs_item *e)
2791 unsigned long offset;
2792 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2793 return btrfs_item_size(eb, e) - offset;
2796 /* btrfs_dev_stats_item */
2797 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2798 struct btrfs_dev_stats_item *ptr,
2803 read_extent_buffer(eb, &val,
2804 offsetof(struct btrfs_dev_stats_item, values) +
2805 ((unsigned long)ptr) + (index * sizeof(u64)),
2810 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2811 struct btrfs_dev_stats_item *ptr,
2814 write_extent_buffer(eb, &val,
2815 offsetof(struct btrfs_dev_stats_item, values) +
2816 ((unsigned long)ptr) + (index * sizeof(u64)),
2820 /* btrfs_qgroup_status_item */
2821 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2823 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2825 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2827 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2830 /* btrfs_qgroup_info_item */
2831 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2833 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2834 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2836 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2837 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2840 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2841 struct btrfs_qgroup_info_item, generation, 64);
2842 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2844 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2845 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2846 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2848 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2849 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2851 /* btrfs_qgroup_limit_item */
2852 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2854 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2856 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2858 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2860 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2863 /* btrfs_dev_replace_item */
2864 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2865 struct btrfs_dev_replace_item, src_devid, 64);
2866 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2867 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2869 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2871 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2873 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2875 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2876 num_write_errors, 64);
2877 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2878 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2880 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2882 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2885 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2886 struct btrfs_dev_replace_item, src_devid, 64);
2887 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2888 struct btrfs_dev_replace_item,
2889 cont_reading_from_srcdev_mode, 64);
2890 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2891 struct btrfs_dev_replace_item, replace_state, 64);
2892 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2893 struct btrfs_dev_replace_item, time_started, 64);
2894 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2895 struct btrfs_dev_replace_item, time_stopped, 64);
2896 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2897 struct btrfs_dev_replace_item, num_write_errors, 64);
2898 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2899 struct btrfs_dev_replace_item,
2900 num_uncorrectable_read_errors, 64);
2901 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2902 struct btrfs_dev_replace_item, cursor_left, 64);
2903 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2904 struct btrfs_dev_replace_item, cursor_right, 64);
2906 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
2908 return sb->s_fs_info;
2911 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2914 return root->leafsize;
2915 return root->nodesize;
2918 /* helper function to cast into the data area of the leaf. */
2919 #define btrfs_item_ptr(leaf, slot, type) \
2920 ((type *)(btrfs_leaf_data(leaf) + \
2921 btrfs_item_offset_nr(leaf, slot)))
2923 #define btrfs_item_ptr_offset(leaf, slot) \
2924 ((unsigned long)(btrfs_leaf_data(leaf) + \
2925 btrfs_item_offset_nr(leaf, slot)))
2927 static inline struct dentry *fdentry(struct file *file)
2929 return file->f_path.dentry;
2932 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2934 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2935 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2938 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2940 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2944 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2947 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2952 * Doing a truncate won't result in new nodes or leaves, just what we need for
2955 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2958 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2962 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2963 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2964 struct btrfs_root *root, unsigned long count);
2965 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2966 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2967 struct btrfs_root *root, u64 bytenr,
2968 u64 num_bytes, u64 *refs, u64 *flags);
2969 int btrfs_pin_extent(struct btrfs_root *root,
2970 u64 bytenr, u64 num, int reserved);
2971 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
2972 u64 bytenr, u64 num_bytes);
2973 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2974 struct btrfs_root *root,
2975 u64 objectid, u64 offset, u64 bytenr);
2976 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2977 struct btrfs_fs_info *info,
2979 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2980 u64 btrfs_find_block_group(struct btrfs_root *root,
2981 u64 search_start, u64 search_hint, int owner);
2982 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2983 struct btrfs_root *root, u32 blocksize,
2984 u64 parent, u64 root_objectid,
2985 struct btrfs_disk_key *key, int level,
2986 u64 hint, u64 empty_size);
2987 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2988 struct btrfs_root *root,
2989 struct extent_buffer *buf,
2990 u64 parent, int last_ref);
2991 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2992 struct btrfs_root *root,
2993 u64 bytenr, u32 blocksize,
2995 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2996 struct btrfs_root *root,
2997 u64 root_objectid, u64 owner,
2998 u64 offset, struct btrfs_key *ins);
2999 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3000 struct btrfs_root *root,
3001 u64 root_objectid, u64 owner, u64 offset,
3002 struct btrfs_key *ins);
3003 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
3004 struct btrfs_root *root,
3005 u64 num_bytes, u64 min_alloc_size,
3006 u64 empty_size, u64 hint_byte,
3007 struct btrfs_key *ins, u64 data);
3008 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3009 struct extent_buffer *buf, int full_backref, int for_cow);
3010 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3011 struct extent_buffer *buf, int full_backref, int for_cow);
3012 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3013 struct btrfs_root *root,
3014 u64 bytenr, u64 num_bytes, u64 flags,
3016 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3017 struct btrfs_root *root,
3018 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3019 u64 owner, u64 offset, int for_cow);
3021 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
3022 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3023 u64 start, u64 len);
3024 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3025 struct btrfs_root *root);
3026 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3027 struct btrfs_root *root);
3028 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3029 struct btrfs_root *root,
3030 u64 bytenr, u64 num_bytes, u64 parent,
3031 u64 root_objectid, u64 owner, u64 offset, int for_cow);
3033 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3034 struct btrfs_root *root);
3035 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3036 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3037 int btrfs_read_block_groups(struct btrfs_root *root);
3038 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3039 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3040 struct btrfs_root *root, u64 bytes_used,
3041 u64 type, u64 chunk_objectid, u64 chunk_offset,
3043 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3044 struct btrfs_root *root, u64 group_start);
3045 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3046 struct btrfs_root *root);
3047 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
3048 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3049 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3051 enum btrfs_reserve_flush_enum {
3052 /* If we are in the transaction, we can't flush anything.*/
3053 BTRFS_RESERVE_NO_FLUSH,
3055 * Flushing delalloc may cause deadlock somewhere, in this
3056 * case, use FLUSH LIMIT
3058 BTRFS_RESERVE_FLUSH_LIMIT,
3059 BTRFS_RESERVE_FLUSH_ALL,
3062 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
3063 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3064 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3065 struct btrfs_root *root);
3066 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3067 struct inode *inode);
3068 void btrfs_orphan_release_metadata(struct inode *inode);
3069 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
3070 struct btrfs_pending_snapshot *pending);
3071 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3072 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3073 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3074 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3075 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3076 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3077 unsigned short type);
3078 void btrfs_free_block_rsv(struct btrfs_root *root,
3079 struct btrfs_block_rsv *rsv);
3080 int btrfs_block_rsv_add(struct btrfs_root *root,
3081 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3082 enum btrfs_reserve_flush_enum flush);
3083 int btrfs_block_rsv_check(struct btrfs_root *root,
3084 struct btrfs_block_rsv *block_rsv, int min_factor);
3085 int btrfs_block_rsv_refill(struct btrfs_root *root,
3086 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3087 enum btrfs_reserve_flush_enum flush);
3088 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3089 struct btrfs_block_rsv *dst_rsv,
3091 void btrfs_block_rsv_release(struct btrfs_root *root,
3092 struct btrfs_block_rsv *block_rsv,
3094 int btrfs_set_block_group_ro(struct btrfs_root *root,
3095 struct btrfs_block_group_cache *cache);
3096 void btrfs_set_block_group_rw(struct btrfs_root *root,
3097 struct btrfs_block_group_cache *cache);
3098 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3099 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3100 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3101 u64 start, u64 end);
3102 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
3103 u64 num_bytes, u64 *actual_bytes);
3104 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3105 struct btrfs_root *root, u64 type);
3106 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3108 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3109 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3110 struct btrfs_fs_info *fs_info);
3111 int __get_raid_index(u64 flags);
3113 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3114 int level, int *slot);
3115 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3116 int btrfs_previous_item(struct btrfs_root *root,
3117 struct btrfs_path *path, u64 min_objectid,
3119 void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
3120 struct btrfs_root *root, struct btrfs_path *path,
3121 struct btrfs_key *new_key);
3122 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3123 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3124 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3125 struct btrfs_key *key, int lowest_level,
3127 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3128 struct btrfs_key *max_key,
3129 struct btrfs_path *path,
3131 enum btrfs_compare_tree_result {
3132 BTRFS_COMPARE_TREE_NEW,
3133 BTRFS_COMPARE_TREE_DELETED,
3134 BTRFS_COMPARE_TREE_CHANGED,
3136 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3137 struct btrfs_root *right_root,
3138 struct btrfs_path *left_path,
3139 struct btrfs_path *right_path,
3140 struct btrfs_key *key,
3141 enum btrfs_compare_tree_result result,
3143 int btrfs_compare_trees(struct btrfs_root *left_root,
3144 struct btrfs_root *right_root,
3145 btrfs_changed_cb_t cb, void *ctx);
3146 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3147 struct btrfs_root *root, struct extent_buffer *buf,
3148 struct extent_buffer *parent, int parent_slot,
3149 struct extent_buffer **cow_ret);
3150 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3151 struct btrfs_root *root,
3152 struct extent_buffer *buf,
3153 struct extent_buffer **cow_ret, u64 new_root_objectid);
3154 int btrfs_block_can_be_shared(struct btrfs_root *root,
3155 struct extent_buffer *buf);
3156 void btrfs_extend_item(struct btrfs_trans_handle *trans,
3157 struct btrfs_root *root, struct btrfs_path *path,
3159 void btrfs_truncate_item(struct btrfs_trans_handle *trans,
3160 struct btrfs_root *root,
3161 struct btrfs_path *path,
3162 u32 new_size, int from_end);
3163 int btrfs_split_item(struct btrfs_trans_handle *trans,
3164 struct btrfs_root *root,
3165 struct btrfs_path *path,
3166 struct btrfs_key *new_key,
3167 unsigned long split_offset);
3168 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3169 struct btrfs_root *root,
3170 struct btrfs_path *path,
3171 struct btrfs_key *new_key);
3172 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3173 *root, struct btrfs_key *key, struct btrfs_path *p, int
3175 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3176 struct btrfs_path *p, u64 time_seq);
3177 int btrfs_search_slot_for_read(struct btrfs_root *root,
3178 struct btrfs_key *key, struct btrfs_path *p,
3179 int find_higher, int return_any);
3180 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3181 struct btrfs_root *root, struct extent_buffer *parent,
3182 int start_slot, u64 *last_ret,
3183 struct btrfs_key *progress);
3184 void btrfs_release_path(struct btrfs_path *p);
3185 struct btrfs_path *btrfs_alloc_path(void);
3186 void btrfs_free_path(struct btrfs_path *p);
3187 void btrfs_set_path_blocking(struct btrfs_path *p);
3188 void btrfs_clear_path_blocking(struct btrfs_path *p,
3189 struct extent_buffer *held, int held_rw);
3190 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3192 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3193 struct btrfs_path *path, int slot, int nr);
3194 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3195 struct btrfs_root *root,
3196 struct btrfs_path *path)
3198 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3201 void setup_items_for_insert(struct btrfs_trans_handle *trans,
3202 struct btrfs_root *root, struct btrfs_path *path,
3203 struct btrfs_key *cpu_key, u32 *data_size,
3204 u32 total_data, u32 total_size, int nr);
3205 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3206 *root, struct btrfs_key *key, void *data, u32 data_size);
3207 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3208 struct btrfs_root *root,
3209 struct btrfs_path *path,
3210 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3212 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3213 struct btrfs_root *root,
3214 struct btrfs_path *path,
3215 struct btrfs_key *key,
3218 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3221 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3222 int btrfs_next_leaf_write(struct btrfs_trans_handle *trans,
3223 struct btrfs_root *root, struct btrfs_path *path,
3225 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3227 static inline int btrfs_next_old_item(struct btrfs_root *root,
3228 struct btrfs_path *p, u64 time_seq)
3231 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3232 return btrfs_next_old_leaf(root, p, time_seq);
3235 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3237 return btrfs_next_old_item(root, p, 0);
3239 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3240 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3241 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3242 struct btrfs_block_rsv *block_rsv,
3243 int update_ref, int for_reloc);
3244 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3245 struct btrfs_root *root,
3246 struct extent_buffer *node,
3247 struct extent_buffer *parent);
3248 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3251 * Get synced with close_ctree()
3254 return fs_info->closing;
3256 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3258 kfree(fs_info->balance_ctl);
3259 kfree(fs_info->delayed_root);
3260 kfree(fs_info->extent_root);
3261 kfree(fs_info->tree_root);
3262 kfree(fs_info->chunk_root);
3263 kfree(fs_info->dev_root);
3264 kfree(fs_info->csum_root);
3265 kfree(fs_info->quota_root);
3266 kfree(fs_info->super_copy);
3267 kfree(fs_info->super_for_commit);
3271 /* tree mod log functions from ctree.c */
3272 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3273 struct seq_list *elem);
3274 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3275 struct seq_list *elem);
3276 static inline u64 btrfs_inc_tree_mod_seq(struct btrfs_fs_info *fs_info)
3278 return atomic_inc_return(&fs_info->tree_mod_seq);
3280 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3283 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3284 struct btrfs_path *path,
3285 u64 root_id, u64 ref_id);
3286 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3287 struct btrfs_root *tree_root,
3288 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3289 const char *name, int name_len);
3290 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3291 struct btrfs_root *tree_root,
3292 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3293 const char *name, int name_len);
3294 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3295 struct btrfs_key *key);
3296 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3297 *root, struct btrfs_key *key, struct btrfs_root_item
3299 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3300 struct btrfs_root *root,
3301 struct btrfs_key *key,
3302 struct btrfs_root_item *item);
3303 void btrfs_read_root_item(struct btrfs_root *root,
3304 struct extent_buffer *eb, int slot,
3305 struct btrfs_root_item *item);
3306 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
3307 btrfs_root_item *item, struct btrfs_key *key);
3308 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
3309 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3310 void btrfs_set_root_node(struct btrfs_root_item *item,
3311 struct extent_buffer *node);
3312 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3313 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3314 struct btrfs_root *root);
3317 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3318 const char *name, int name_len);
3319 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3320 struct btrfs_root *root, const char *name,
3321 int name_len, struct inode *dir,
3322 struct btrfs_key *location, u8 type, u64 index);
3323 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3324 struct btrfs_root *root,
3325 struct btrfs_path *path, u64 dir,
3326 const char *name, int name_len,
3328 struct btrfs_dir_item *
3329 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3330 struct btrfs_root *root,
3331 struct btrfs_path *path, u64 dir,
3332 u64 objectid, const char *name, int name_len,
3334 struct btrfs_dir_item *
3335 btrfs_search_dir_index_item(struct btrfs_root *root,
3336 struct btrfs_path *path, u64 dirid,
3337 const char *name, int name_len);
3338 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3339 struct btrfs_path *path,
3340 const char *name, int name_len);
3341 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3342 struct btrfs_root *root,
3343 struct btrfs_path *path,
3344 struct btrfs_dir_item *di);
3345 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3346 struct btrfs_root *root,
3347 struct btrfs_path *path, u64 objectid,
3348 const char *name, u16 name_len,
3349 const void *data, u16 data_len);
3350 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3351 struct btrfs_root *root,
3352 struct btrfs_path *path, u64 dir,
3353 const char *name, u16 name_len,
3355 int verify_dir_item(struct btrfs_root *root,
3356 struct extent_buffer *leaf,
3357 struct btrfs_dir_item *dir_item);
3360 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3361 struct btrfs_root *root, u64 offset);
3362 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3363 struct btrfs_root *root, u64 offset);
3364 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3367 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3368 struct btrfs_root *root,
3369 const char *name, int name_len,
3370 u64 inode_objectid, u64 ref_objectid, u64 index);
3371 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3372 struct btrfs_root *root,
3373 const char *name, int name_len,
3374 u64 inode_objectid, u64 ref_objectid, u64 *index);
3375 int btrfs_get_inode_ref_index(struct btrfs_trans_handle *trans,
3376 struct btrfs_root *root,
3377 struct btrfs_path *path,
3378 const char *name, int name_len,
3379 u64 inode_objectid, u64 ref_objectid, int mod,
3381 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3382 struct btrfs_root *root,
3383 struct btrfs_path *path, u64 objectid);
3384 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3385 *root, struct btrfs_path *path,
3386 struct btrfs_key *location, int mod);
3388 struct btrfs_inode_extref *
3389 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3390 struct btrfs_root *root,
3391 struct btrfs_path *path,
3392 const char *name, int name_len,
3393 u64 inode_objectid, u64 ref_objectid, int ins_len,
3396 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3397 u64 ref_objectid, const char *name,
3399 struct btrfs_inode_extref **extref_ret);
3402 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3403 struct btrfs_root *root, u64 bytenr, u64 len);
3404 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3405 struct bio *bio, u32 *dst);
3406 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3407 struct bio *bio, u64 logical_offset);
3408 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3409 struct btrfs_root *root,
3410 u64 objectid, u64 pos,
3411 u64 disk_offset, u64 disk_num_bytes,
3412 u64 num_bytes, u64 offset, u64 ram_bytes,
3413 u8 compression, u8 encryption, u16 other_encoding);
3414 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3415 struct btrfs_root *root,
3416 struct btrfs_path *path, u64 objectid,
3417 u64 bytenr, int mod);
3418 u64 btrfs_file_extent_length(struct btrfs_path *path);
3419 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3420 struct btrfs_root *root,
3421 struct btrfs_ordered_sum *sums);
3422 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3423 struct bio *bio, u64 file_start, int contig);
3424 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
3425 struct btrfs_root *root,
3426 struct btrfs_path *path,
3427 u64 bytenr, int cow);
3428 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
3429 struct btrfs_root *root, struct btrfs_path *path,
3431 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3432 struct list_head *list, int search_commit);
3434 struct btrfs_delalloc_work {
3435 struct inode *inode;
3438 struct completion completion;
3439 struct list_head list;
3440 struct btrfs_work work;
3443 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3444 int wait, int delay_iput);
3445 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3447 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3448 size_t pg_offset, u64 start, u64 len,
3451 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3452 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3453 #define ClearPageChecked ClearPageFsMisc
3454 #define SetPageChecked SetPageFsMisc
3455 #define PageChecked PageFsMisc
3458 /* This forces readahead on a given range of bytes in an inode */
3459 static inline void btrfs_force_ra(struct address_space *mapping,
3460 struct file_ra_state *ra, struct file *file,
3461 pgoff_t offset, unsigned long req_size)
3463 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3466 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3467 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3468 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3469 struct btrfs_root *root,
3470 struct inode *dir, struct inode *inode,
3471 const char *name, int name_len);
3472 int btrfs_add_link(struct btrfs_trans_handle *trans,
3473 struct inode *parent_inode, struct inode *inode,
3474 const char *name, int name_len, int add_backref, u64 index);
3475 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3476 struct btrfs_root *root,
3477 struct inode *dir, u64 objectid,
3478 const char *name, int name_len);
3479 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3481 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3482 struct btrfs_root *root,
3483 struct inode *inode, u64 new_size,
3486 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3487 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3488 struct extent_state **cached_state);
3489 int btrfs_writepages(struct address_space *mapping,
3490 struct writeback_control *wbc);
3491 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3492 struct btrfs_root *new_root, u64 new_dirid);
3493 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3494 size_t size, struct bio *bio, unsigned long bio_flags);
3496 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3497 int btrfs_readpage(struct file *file, struct page *page);
3498 void btrfs_evict_inode(struct inode *inode);
3499 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3500 int btrfs_dirty_inode(struct inode *inode);
3501 struct inode *btrfs_alloc_inode(struct super_block *sb);
3502 void btrfs_destroy_inode(struct inode *inode);
3503 int btrfs_drop_inode(struct inode *inode);
3504 int btrfs_init_cachep(void);
3505 void btrfs_destroy_cachep(void);
3506 long btrfs_ioctl_trans_end(struct file *file);
3507 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3508 struct btrfs_root *root, int *was_new);
3509 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3510 size_t pg_offset, u64 start, u64 end,
3512 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3513 struct btrfs_root *root,
3514 struct inode *inode);
3515 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3516 struct btrfs_root *root, struct inode *inode);
3517 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3518 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
3519 int btrfs_orphan_cleanup(struct btrfs_root *root);
3520 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3521 struct btrfs_root *root);
3522 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3523 void btrfs_invalidate_inodes(struct btrfs_root *root);
3524 void btrfs_add_delayed_iput(struct inode *inode);
3525 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3526 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3527 u64 start, u64 num_bytes, u64 min_size,
3528 loff_t actual_len, u64 *alloc_hint);
3529 int btrfs_prealloc_file_range_trans(struct inode *inode,
3530 struct btrfs_trans_handle *trans, int mode,
3531 u64 start, u64 num_bytes, u64 min_size,
3532 loff_t actual_len, u64 *alloc_hint);
3533 extern const struct dentry_operations btrfs_dentry_operations;
3536 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3537 void btrfs_update_iflags(struct inode *inode);
3538 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3539 int btrfs_defrag_file(struct inode *inode, struct file *file,
3540 struct btrfs_ioctl_defrag_range_args *range,
3541 u64 newer_than, unsigned long max_pages);
3542 void btrfs_get_block_group_info(struct list_head *groups_list,
3543 struct btrfs_ioctl_space_info *space);
3546 int btrfs_auto_defrag_init(void);
3547 void btrfs_auto_defrag_exit(void);
3548 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3549 struct inode *inode);
3550 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3551 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3552 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3553 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3555 int btrfs_replace_extent_cache(struct inode *inode, struct extent_map *replace,
3556 u64 start, u64 end, int skip_pinned,
3558 extern const struct file_operations btrfs_file_operations;
3559 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3560 struct btrfs_root *root, struct inode *inode,
3561 struct btrfs_path *path, u64 start, u64 end,
3562 u64 *drop_end, int drop_cache);
3563 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3564 struct btrfs_root *root, struct inode *inode, u64 start,
3565 u64 end, int drop_cache);
3566 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3567 struct inode *inode, u64 start, u64 end);
3568 int btrfs_release_file(struct inode *inode, struct file *file);
3569 void btrfs_drop_pages(struct page **pages, size_t num_pages);
3570 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3571 struct page **pages, size_t num_pages,
3572 loff_t pos, size_t write_bytes,
3573 struct extent_state **cached);
3576 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3577 struct btrfs_root *root);
3580 int btrfs_init_sysfs(void);
3581 void btrfs_exit_sysfs(void);
3584 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3587 int btrfs_parse_options(struct btrfs_root *root, char *options);
3588 int btrfs_sync_fs(struct super_block *sb, int wait);
3590 #ifdef CONFIG_PRINTK
3592 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
3594 static inline __printf(2, 3)
3595 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...)
3601 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3602 unsigned int line, int errno, const char *fmt, ...);
3605 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3606 struct btrfs_root *root, const char *function,
3607 unsigned int line, int errno);
3609 #define btrfs_set_fs_incompat(__fs_info, opt) \
3610 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3612 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3615 struct btrfs_super_block *disk_super;
3618 disk_super = fs_info->super_copy;
3619 features = btrfs_super_incompat_flags(disk_super);
3620 if (!(features & flag)) {
3622 btrfs_set_super_incompat_flags(disk_super, features);
3627 * Call btrfs_abort_transaction as early as possible when an error condition is
3628 * detected, that way the exact line number is reported.
3631 #define btrfs_abort_transaction(trans, root, errno) \
3633 __btrfs_abort_transaction(trans, root, __func__, \
3637 #define btrfs_std_error(fs_info, errno) \
3640 __btrfs_std_error((fs_info), __func__, \
3641 __LINE__, (errno), NULL); \
3644 #define btrfs_error(fs_info, errno, fmt, args...) \
3646 __btrfs_std_error((fs_info), __func__, __LINE__, \
3647 (errno), fmt, ##args); \
3651 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3652 unsigned int line, int errno, const char *fmt, ...);
3655 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3656 * will panic(). Otherwise we BUG() here.
3658 #define btrfs_panic(fs_info, errno, fmt, args...) \
3660 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3665 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3666 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3667 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3668 struct inode *inode, struct inode *dir);
3669 int btrfs_acl_chmod(struct inode *inode);
3671 #define btrfs_get_acl NULL
3672 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3673 struct inode *inode, struct inode *dir)
3677 static inline int btrfs_acl_chmod(struct inode *inode)
3684 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3685 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3686 struct btrfs_root *root);
3687 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3688 struct btrfs_root *root);
3689 int btrfs_recover_relocation(struct btrfs_root *root);
3690 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3691 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3692 struct btrfs_root *root, struct extent_buffer *buf,
3693 struct extent_buffer *cow);
3694 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3695 struct btrfs_pending_snapshot *pending,
3696 u64 *bytes_to_reserve);
3697 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3698 struct btrfs_pending_snapshot *pending);
3701 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3702 u64 end, struct btrfs_scrub_progress *progress,
3703 int readonly, int is_dev_replace);
3704 void btrfs_scrub_pause(struct btrfs_root *root);
3705 void btrfs_scrub_pause_super(struct btrfs_root *root);
3706 void btrfs_scrub_continue(struct btrfs_root *root);
3707 void btrfs_scrub_continue_super(struct btrfs_root *root);
3708 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3709 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3710 struct btrfs_device *dev);
3711 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
3712 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3713 struct btrfs_scrub_progress *progress);
3716 struct reada_control {
3717 struct btrfs_root *root; /* tree to prefetch */
3718 struct btrfs_key key_start;
3719 struct btrfs_key key_end; /* exclusive */
3722 wait_queue_head_t wait;
3724 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3725 struct btrfs_key *start, struct btrfs_key *end);
3726 int btrfs_reada_wait(void *handle);
3727 void btrfs_reada_detach(void *handle);
3728 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3729 u64 start, int err);
3732 struct qgroup_update {
3733 struct list_head list;
3734 struct btrfs_delayed_ref_node *node;
3735 struct btrfs_delayed_extent_op *extent_op;
3738 int btrfs_quota_enable(struct btrfs_trans_handle *trans,
3739 struct btrfs_fs_info *fs_info);
3740 int btrfs_quota_disable(struct btrfs_trans_handle *trans,
3741 struct btrfs_fs_info *fs_info);
3742 int btrfs_quota_rescan(struct btrfs_fs_info *fs_info);
3743 int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
3744 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3745 int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
3746 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3747 int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
3748 struct btrfs_fs_info *fs_info, u64 qgroupid,
3750 int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
3751 struct btrfs_fs_info *fs_info, u64 qgroupid);
3752 int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
3753 struct btrfs_fs_info *fs_info, u64 qgroupid,
3754 struct btrfs_qgroup_limit *limit);
3755 int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
3756 void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
3757 struct btrfs_delayed_extent_op;
3758 int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
3759 struct btrfs_delayed_ref_node *node,
3760 struct btrfs_delayed_extent_op *extent_op);
3761 int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
3762 struct btrfs_fs_info *fs_info,
3763 struct btrfs_delayed_ref_node *node,
3764 struct btrfs_delayed_extent_op *extent_op);
3765 int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
3766 struct btrfs_fs_info *fs_info);
3767 int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
3768 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
3769 struct btrfs_qgroup_inherit *inherit);
3770 int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
3771 void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
3773 void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
3775 static inline int is_fstree(u64 rootid)
3777 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3778 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
3783 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3785 return signal_pending(current);