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
342 #define BTRFS_FS_STATE_REMOUNTING 1
343 #define BTRFS_FS_STATE_TRANS_ABORTED 2
345 /* Super block flags */
346 /* Errors detected */
347 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
349 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
350 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
352 #define BTRFS_BACKREF_REV_MAX 256
353 #define BTRFS_BACKREF_REV_SHIFT 56
354 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
355 BTRFS_BACKREF_REV_SHIFT)
357 #define BTRFS_OLD_BACKREF_REV 0
358 #define BTRFS_MIXED_BACKREF_REV 1
361 * every tree block (leaf or node) starts with this header.
363 struct btrfs_header {
364 /* these first four must match the super block */
365 u8 csum[BTRFS_CSUM_SIZE];
366 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
367 __le64 bytenr; /* which block this node is supposed to live in */
370 /* allowed to be different from the super from here on down */
371 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
376 } __attribute__ ((__packed__));
378 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
379 sizeof(struct btrfs_header)) / \
380 sizeof(struct btrfs_key_ptr))
381 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
382 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
383 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
384 sizeof(struct btrfs_item) - \
385 sizeof(struct btrfs_file_extent_item))
386 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
387 sizeof(struct btrfs_item) -\
388 sizeof(struct btrfs_dir_item))
392 * this is a very generous portion of the super block, giving us
393 * room to translate 14 chunks with 3 stripes each.
395 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
396 #define BTRFS_LABEL_SIZE 256
399 * just in case we somehow lose the roots and are not able to mount,
400 * we store an array of the roots from previous transactions
403 #define BTRFS_NUM_BACKUP_ROOTS 4
404 struct btrfs_root_backup {
406 __le64 tree_root_gen;
409 __le64 chunk_root_gen;
412 __le64 extent_root_gen;
421 __le64 csum_root_gen;
431 u8 extent_root_level;
435 /* future and to align */
437 } __attribute__ ((__packed__));
440 * the super block basically lists the main trees of the FS
441 * it currently lacks any block count etc etc
443 struct btrfs_super_block {
444 u8 csum[BTRFS_CSUM_SIZE];
445 /* the first 4 fields must match struct btrfs_header */
446 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
447 __le64 bytenr; /* this block number */
450 /* allowed to be different from the btrfs_header from here own down */
457 /* this will help find the new super based on the log root */
458 __le64 log_root_transid;
461 __le64 root_dir_objectid;
467 __le32 sys_chunk_array_size;
468 __le64 chunk_root_generation;
470 __le64 compat_ro_flags;
471 __le64 incompat_flags;
476 struct btrfs_dev_item dev_item;
478 char label[BTRFS_LABEL_SIZE];
480 __le64 cache_generation;
482 /* future expansion */
484 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
485 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
486 } __attribute__ ((__packed__));
489 * Compat flags that we support. If any incompat flags are set other than the
490 * ones specified below then we will fail to mount
492 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
493 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
494 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
495 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
497 * some patches floated around with a second compression method
498 * lets save that incompat here for when they do get in
499 * Note we don't actually support it, we're just reserving the
502 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
505 * older kernels tried to do bigger metadata blocks, but the
506 * code was pretty buggy. Lets not let them try anymore.
508 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
510 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
511 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
513 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
514 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
515 #define BTRFS_FEATURE_INCOMPAT_SUPP \
516 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
517 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
518 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
519 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
520 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
521 BTRFS_FEATURE_INCOMPAT_RAID56 | \
522 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
525 * A leaf is full of items. offset and size tell us where to find
526 * the item in the leaf (relative to the start of the data area)
529 struct btrfs_disk_key key;
532 } __attribute__ ((__packed__));
535 * leaves have an item area and a data area:
536 * [item0, item1....itemN] [free space] [dataN...data1, data0]
538 * The data is separate from the items to get the keys closer together
542 struct btrfs_header header;
543 struct btrfs_item items[];
544 } __attribute__ ((__packed__));
547 * all non-leaf blocks are nodes, they hold only keys and pointers to
550 struct btrfs_key_ptr {
551 struct btrfs_disk_key key;
554 } __attribute__ ((__packed__));
557 struct btrfs_header header;
558 struct btrfs_key_ptr ptrs[];
559 } __attribute__ ((__packed__));
562 * btrfs_paths remember the path taken from the root down to the leaf.
563 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
564 * to any other levels that are present.
566 * The slots array records the index of the item or block pointer
567 * used while walking the tree.
570 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
571 int slots[BTRFS_MAX_LEVEL];
572 /* if there is real range locking, this locks field will change */
573 int locks[BTRFS_MAX_LEVEL];
575 /* keep some upper locks as we walk down */
579 * set by btrfs_split_item, tells search_slot to keep all locks
580 * and to force calls to keep space in the nodes
582 unsigned int search_for_split:1;
583 unsigned int keep_locks:1;
584 unsigned int skip_locking:1;
585 unsigned int leave_spinning:1;
586 unsigned int search_commit_root:1;
587 unsigned int really_keep_locks:1;
591 * items in the extent btree are used to record the objectid of the
592 * owner of the block and the number of references
595 struct btrfs_extent_item {
599 } __attribute__ ((__packed__));
601 struct btrfs_extent_item_v0 {
603 } __attribute__ ((__packed__));
605 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
606 sizeof(struct btrfs_item))
608 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
609 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
611 /* following flags only apply to tree blocks */
613 /* use full backrefs for extent pointers in the block */
614 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
617 * this flag is only used internally by scrub and may be changed at any time
618 * it is only declared here to avoid collisions
620 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
622 struct btrfs_tree_block_info {
623 struct btrfs_disk_key key;
625 } __attribute__ ((__packed__));
627 struct btrfs_extent_data_ref {
632 } __attribute__ ((__packed__));
634 struct btrfs_shared_data_ref {
636 } __attribute__ ((__packed__));
638 struct btrfs_extent_inline_ref {
641 } __attribute__ ((__packed__));
643 /* old style backrefs item */
644 struct btrfs_extent_ref_v0 {
649 } __attribute__ ((__packed__));
652 /* dev extents record free space on individual devices. The owner
653 * field points back to the chunk allocation mapping tree that allocated
654 * the extent. The chunk tree uuid field is a way to double check the owner
656 struct btrfs_dev_extent {
658 __le64 chunk_objectid;
661 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
662 } __attribute__ ((__packed__));
664 struct btrfs_inode_ref {
668 } __attribute__ ((__packed__));
670 struct btrfs_inode_extref {
671 __le64 parent_objectid;
676 } __attribute__ ((__packed__));
678 struct btrfs_timespec {
681 } __attribute__ ((__packed__));
683 enum btrfs_compression_type {
684 BTRFS_COMPRESS_NONE = 0,
685 BTRFS_COMPRESS_ZLIB = 1,
686 BTRFS_COMPRESS_LZO = 2,
687 BTRFS_COMPRESS_TYPES = 2,
688 BTRFS_COMPRESS_LAST = 3,
691 struct btrfs_inode_item {
692 /* nfs style generation number */
694 /* transid that last touched this inode */
706 /* modification sequence number for NFS */
710 * a little future expansion, for more than this we can
711 * just grow the inode item and version it
714 struct btrfs_timespec atime;
715 struct btrfs_timespec ctime;
716 struct btrfs_timespec mtime;
717 struct btrfs_timespec otime;
718 } __attribute__ ((__packed__));
720 struct btrfs_dir_log_item {
722 } __attribute__ ((__packed__));
724 struct btrfs_dir_item {
725 struct btrfs_disk_key location;
730 } __attribute__ ((__packed__));
732 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
734 struct btrfs_root_item {
735 struct btrfs_inode_item inode;
741 __le64 last_snapshot;
744 struct btrfs_disk_key drop_progress;
749 * The following fields appear after subvol_uuids+subvol_times
754 * This generation number is used to test if the new fields are valid
755 * and up to date while reading the root item. Everytime the root item
756 * is written out, the "generation" field is copied into this field. If
757 * anyone ever mounted the fs with an older kernel, we will have
758 * mismatching generation values here and thus must invalidate the
759 * new fields. See btrfs_update_root and btrfs_find_last_root for
761 * the offset of generation_v2 is also used as the start for the memset
762 * when invalidating the fields.
764 __le64 generation_v2;
765 u8 uuid[BTRFS_UUID_SIZE];
766 u8 parent_uuid[BTRFS_UUID_SIZE];
767 u8 received_uuid[BTRFS_UUID_SIZE];
768 __le64 ctransid; /* updated when an inode changes */
769 __le64 otransid; /* trans when created */
770 __le64 stransid; /* trans when sent. non-zero for received subvol */
771 __le64 rtransid; /* trans when received. non-zero for received subvol */
772 struct btrfs_timespec ctime;
773 struct btrfs_timespec otime;
774 struct btrfs_timespec stime;
775 struct btrfs_timespec rtime;
776 __le64 reserved[8]; /* for future */
777 } __attribute__ ((__packed__));
780 * this is used for both forward and backward root refs
782 struct btrfs_root_ref {
786 } __attribute__ ((__packed__));
788 struct btrfs_disk_balance_args {
790 * profiles to operate on, single is denoted by
791 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
801 /* devid subset filter [pstart..pend) */
805 /* btrfs virtual address space subset filter [vstart..vend) */
810 * profile to convert to, single is denoted by
811 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
815 /* BTRFS_BALANCE_ARGS_* */
819 } __attribute__ ((__packed__));
822 * store balance parameters to disk so that balance can be properly
823 * resumed after crash or unmount
825 struct btrfs_balance_item {
826 /* BTRFS_BALANCE_* */
829 struct btrfs_disk_balance_args data;
830 struct btrfs_disk_balance_args meta;
831 struct btrfs_disk_balance_args sys;
834 } __attribute__ ((__packed__));
836 #define BTRFS_FILE_EXTENT_INLINE 0
837 #define BTRFS_FILE_EXTENT_REG 1
838 #define BTRFS_FILE_EXTENT_PREALLOC 2
840 struct btrfs_file_extent_item {
842 * transaction id that created this extent
846 * max number of bytes to hold this extent in ram
847 * when we split a compressed extent we can't know how big
848 * each of the resulting pieces will be. So, this is
849 * an upper limit on the size of the extent in ram instead of
855 * 32 bits for the various ways we might encode the data,
856 * including compression and encryption. If any of these
857 * are set to something a given disk format doesn't understand
858 * it is treated like an incompat flag for reading and writing,
863 __le16 other_encoding; /* spare for later use */
865 /* are we inline data or a real extent? */
869 * disk space consumed by the extent, checksum blocks are included
873 __le64 disk_num_bytes;
875 * the logical offset in file blocks (no csums)
876 * this extent record is for. This allows a file extent to point
877 * into the middle of an existing extent on disk, sharing it
878 * between two snapshots (useful if some bytes in the middle of the
879 * extent have changed
883 * the logical number of file blocks (no csums included). This
884 * always reflects the size uncompressed and without encoding.
888 } __attribute__ ((__packed__));
890 struct btrfs_csum_item {
892 } __attribute__ ((__packed__));
894 struct btrfs_dev_stats_item {
896 * grow this item struct at the end for future enhancements and keep
897 * the existing values unchanged
899 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
900 } __attribute__ ((__packed__));
902 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
903 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
904 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
905 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
906 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
907 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
908 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
910 struct btrfs_dev_replace {
911 u64 replace_state; /* see #define above */
912 u64 time_started; /* seconds since 1-Jan-1970 */
913 u64 time_stopped; /* seconds since 1-Jan-1970 */
914 atomic64_t num_write_errors;
915 atomic64_t num_uncorrectable_read_errors;
918 u64 committed_cursor_left;
919 u64 cursor_left_last_write_of_item;
922 u64 cont_reading_from_srcdev_mode; /* see #define above */
925 int item_needs_writeback;
926 struct btrfs_device *srcdev;
927 struct btrfs_device *tgtdev;
930 atomic_t nesting_level;
931 struct mutex lock_finishing_cancel_unmount;
932 struct mutex lock_management_lock;
935 struct btrfs_scrub_progress scrub_progress;
938 struct btrfs_dev_replace_item {
940 * grow this item struct at the end for future enhancements and keep
941 * the existing values unchanged
946 __le64 cont_reading_from_srcdev_mode;
948 __le64 replace_state;
951 __le64 num_write_errors;
952 __le64 num_uncorrectable_read_errors;
953 } __attribute__ ((__packed__));
955 /* different types of block groups (and chunks) */
956 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
957 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
958 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
959 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
960 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
961 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
962 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
963 #define BTRFS_BLOCK_GROUP_RAID5 (1 << 7)
964 #define BTRFS_BLOCK_GROUP_RAID6 (1 << 8)
965 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
967 enum btrfs_raid_types {
978 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
979 BTRFS_BLOCK_GROUP_SYSTEM | \
980 BTRFS_BLOCK_GROUP_METADATA)
982 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
983 BTRFS_BLOCK_GROUP_RAID1 | \
984 BTRFS_BLOCK_GROUP_RAID5 | \
985 BTRFS_BLOCK_GROUP_RAID6 | \
986 BTRFS_BLOCK_GROUP_DUP | \
987 BTRFS_BLOCK_GROUP_RAID10)
989 * We need a bit for restriper to be able to tell when chunks of type
990 * SINGLE are available. This "extended" profile format is used in
991 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
992 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
993 * to avoid remappings between two formats in future.
995 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
997 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
998 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1000 static inline u64 chunk_to_extended(u64 flags)
1002 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1003 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1007 static inline u64 extended_to_chunk(u64 flags)
1009 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1012 struct btrfs_block_group_item {
1014 __le64 chunk_objectid;
1016 } __attribute__ ((__packed__));
1019 * is subvolume quota turned on?
1021 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1023 * SCANNING is set during the initialization phase
1025 #define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
1027 * Some qgroup entries are known to be out of date,
1028 * either because the configuration has changed in a way that
1029 * makes a rescan necessary, or because the fs has been mounted
1030 * with a non-qgroup-aware version.
1031 * Turning qouta off and on again makes it inconsistent, too.
1033 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1035 #define BTRFS_QGROUP_STATUS_VERSION 1
1037 struct btrfs_qgroup_status_item {
1040 * the generation is updated during every commit. As older
1041 * versions of btrfs are not aware of qgroups, it will be
1042 * possible to detect inconsistencies by checking the
1043 * generation on mount time
1047 /* flag definitions see above */
1051 * only used during scanning to record the progress
1052 * of the scan. It contains a logical address
1055 } __attribute__ ((__packed__));
1057 struct btrfs_qgroup_info_item {
1063 } __attribute__ ((__packed__));
1065 /* flags definition for qgroup limits */
1066 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1067 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1068 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1069 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1070 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1071 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1073 struct btrfs_qgroup_limit_item {
1075 * only updated when any of the other values change
1082 } __attribute__ ((__packed__));
1084 struct btrfs_space_info {
1087 u64 total_bytes; /* total bytes in the space,
1088 this doesn't take mirrors into account */
1089 u64 bytes_used; /* total bytes used,
1090 this doesn't take mirrors into account */
1091 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1092 transaction finishes */
1093 u64 bytes_reserved; /* total bytes the allocator has reserved for
1094 current allocations */
1095 u64 bytes_readonly; /* total bytes that are read only */
1097 u64 bytes_may_use; /* number of bytes that may be used for
1098 delalloc/allocations */
1099 u64 disk_used; /* total bytes used on disk */
1100 u64 disk_total; /* total bytes on disk, takes mirrors into
1104 * we bump reservation progress every time we decrement
1105 * bytes_reserved. This way people waiting for reservations
1106 * know something good has happened and they can check
1107 * for progress. The number here isn't to be trusted, it
1108 * just shows reclaim activity
1110 unsigned long reservation_progress;
1112 unsigned int full:1; /* indicates that we cannot allocate any more
1113 chunks for this space */
1114 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1116 unsigned int flush:1; /* set if we are trying to make space */
1118 unsigned int force_alloc; /* set if we need to force a chunk
1119 alloc for this space */
1121 struct list_head list;
1123 /* for block groups in our same type */
1124 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1126 struct rw_semaphore groups_sem;
1127 wait_queue_head_t wait;
1130 #define BTRFS_BLOCK_RSV_GLOBAL 1
1131 #define BTRFS_BLOCK_RSV_DELALLOC 2
1132 #define BTRFS_BLOCK_RSV_TRANS 3
1133 #define BTRFS_BLOCK_RSV_CHUNK 4
1134 #define BTRFS_BLOCK_RSV_DELOPS 5
1135 #define BTRFS_BLOCK_RSV_EMPTY 6
1136 #define BTRFS_BLOCK_RSV_TEMP 7
1138 struct btrfs_block_rsv {
1141 struct btrfs_space_info *space_info;
1143 unsigned short full;
1144 unsigned short type;
1145 unsigned short failfast;
1149 * free clusters are used to claim free space in relatively large chunks,
1150 * allowing us to do less seeky writes. They are used for all metadata
1151 * allocations and data allocations in ssd mode.
1153 struct btrfs_free_cluster {
1155 spinlock_t refill_lock;
1156 struct rb_root root;
1158 /* largest extent in this cluster */
1161 /* first extent starting offset */
1164 struct btrfs_block_group_cache *block_group;
1166 * when a cluster is allocated from a block group, we put the
1167 * cluster onto a list in the block group so that it can
1168 * be freed before the block group is freed.
1170 struct list_head block_group_list;
1173 enum btrfs_caching_type {
1175 BTRFS_CACHE_STARTED = 1,
1176 BTRFS_CACHE_FAST = 2,
1177 BTRFS_CACHE_FINISHED = 3,
1180 enum btrfs_disk_cache_state {
1181 BTRFS_DC_WRITTEN = 0,
1185 BTRFS_DC_NEED_WRITE = 4,
1188 struct btrfs_caching_control {
1189 struct list_head list;
1191 wait_queue_head_t wait;
1192 struct btrfs_work work;
1193 struct btrfs_block_group_cache *block_group;
1198 struct btrfs_block_group_cache {
1199 struct btrfs_key key;
1200 struct btrfs_block_group_item item;
1201 struct btrfs_fs_info *fs_info;
1202 struct inode *inode;
1209 u64 cache_generation;
1211 /* for raid56, this is a full stripe, without parity */
1212 unsigned long full_stripe_len;
1215 unsigned int dirty:1;
1216 unsigned int iref:1;
1218 int disk_cache_state;
1220 /* cache tracking stuff */
1222 struct btrfs_caching_control *caching_ctl;
1223 u64 last_byte_to_unpin;
1225 struct btrfs_space_info *space_info;
1227 /* free space cache stuff */
1228 struct btrfs_free_space_ctl *free_space_ctl;
1230 /* block group cache stuff */
1231 struct rb_node cache_node;
1233 /* for block groups in the same raid type */
1234 struct list_head list;
1239 /* List of struct btrfs_free_clusters for this block group.
1240 * Today it will only have one thing on it, but that may change
1242 struct list_head cluster_list;
1244 /* For delayed block group creation */
1245 struct list_head new_bg_list;
1248 /* delayed seq elem */
1250 struct list_head list;
1254 enum btrfs_orphan_cleanup_state {
1255 ORPHAN_CLEANUP_STARTED = 1,
1256 ORPHAN_CLEANUP_DONE = 2,
1259 /* used by the raid56 code to lock stripes for read/modify/write */
1260 struct btrfs_stripe_hash {
1261 struct list_head hash_list;
1262 wait_queue_head_t wait;
1266 /* used by the raid56 code to lock stripes for read/modify/write */
1267 struct btrfs_stripe_hash_table {
1268 struct list_head stripe_cache;
1269 spinlock_t cache_lock;
1271 struct btrfs_stripe_hash table[];
1274 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1277 struct reloc_control;
1278 struct btrfs_device;
1279 struct btrfs_fs_devices;
1280 struct btrfs_balance_control;
1281 struct btrfs_delayed_root;
1282 struct btrfs_fs_info {
1283 u8 fsid[BTRFS_FSID_SIZE];
1284 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1285 struct btrfs_root *extent_root;
1286 struct btrfs_root *tree_root;
1287 struct btrfs_root *chunk_root;
1288 struct btrfs_root *dev_root;
1289 struct btrfs_root *fs_root;
1290 struct btrfs_root *csum_root;
1291 struct btrfs_root *quota_root;
1293 /* the log root tree is a directory of all the other log roots */
1294 struct btrfs_root *log_root_tree;
1296 spinlock_t fs_roots_radix_lock;
1297 struct radix_tree_root fs_roots_radix;
1299 /* block group cache stuff */
1300 spinlock_t block_group_cache_lock;
1301 u64 first_logical_byte;
1302 struct rb_root block_group_cache_tree;
1304 /* keep track of unallocated space */
1305 spinlock_t free_chunk_lock;
1306 u64 free_chunk_space;
1308 struct extent_io_tree freed_extents[2];
1309 struct extent_io_tree *pinned_extents;
1311 /* logical->physical extent mapping */
1312 struct btrfs_mapping_tree mapping_tree;
1315 * block reservation for extent, checksum, root tree and
1316 * delayed dir index item
1318 struct btrfs_block_rsv global_block_rsv;
1319 /* block reservation for delay allocation */
1320 struct btrfs_block_rsv delalloc_block_rsv;
1321 /* block reservation for metadata operations */
1322 struct btrfs_block_rsv trans_block_rsv;
1323 /* block reservation for chunk tree */
1324 struct btrfs_block_rsv chunk_block_rsv;
1325 /* block reservation for delayed operations */
1326 struct btrfs_block_rsv delayed_block_rsv;
1328 struct btrfs_block_rsv empty_block_rsv;
1331 u64 last_trans_committed;
1334 * this is updated to the current trans every time a full commit
1335 * is required instead of the faster short fsync log commits
1337 u64 last_trans_log_full_commit;
1338 unsigned long mount_opt;
1339 unsigned long compress_type:4;
1341 * It is a suggestive number, the read side is safe even it gets a
1342 * wrong number because we will write out the data into a regular
1343 * extent. The write side(mount/remount) is under ->s_umount lock,
1344 * so it is also safe.
1348 * Protected by ->chunk_mutex and sb->s_umount.
1350 * The reason that we use two lock to protect it is because only
1351 * remount and mount operations can change it and these two operations
1352 * are under sb->s_umount, but the read side (chunk allocation) can not
1353 * acquire sb->s_umount or the deadlock would happen. So we use two
1354 * locks to protect it. On the write side, we must acquire two locks,
1355 * and on the read side, we just need acquire one of them.
1358 struct btrfs_transaction *running_transaction;
1359 wait_queue_head_t transaction_throttle;
1360 wait_queue_head_t transaction_wait;
1361 wait_queue_head_t transaction_blocked_wait;
1362 wait_queue_head_t async_submit_wait;
1364 struct btrfs_super_block *super_copy;
1365 struct btrfs_super_block *super_for_commit;
1366 struct block_device *__bdev;
1367 struct super_block *sb;
1368 struct inode *btree_inode;
1369 struct backing_dev_info bdi;
1370 struct mutex tree_log_mutex;
1371 struct mutex transaction_kthread_mutex;
1372 struct mutex cleaner_mutex;
1373 struct mutex chunk_mutex;
1374 struct mutex volume_mutex;
1376 /* this is used during read/modify/write to make sure
1377 * no two ios are trying to mod the same stripe at the same
1380 struct btrfs_stripe_hash_table *stripe_hash_table;
1383 * this protects the ordered operations list only while we are
1384 * processing all of the entries on it. This way we make
1385 * sure the commit code doesn't find the list temporarily empty
1386 * because another function happens to be doing non-waiting preflush
1387 * before jumping into the main commit.
1389 struct mutex ordered_operations_mutex;
1390 struct rw_semaphore extent_commit_sem;
1392 struct rw_semaphore cleanup_work_sem;
1394 struct rw_semaphore subvol_sem;
1395 struct srcu_struct subvol_srcu;
1397 spinlock_t trans_lock;
1399 * the reloc mutex goes with the trans lock, it is taken
1400 * during commit to protect us from the relocation code
1402 struct mutex reloc_mutex;
1404 struct list_head trans_list;
1405 struct list_head dead_roots;
1406 struct list_head caching_block_groups;
1408 spinlock_t delayed_iput_lock;
1409 struct list_head delayed_iputs;
1411 /* this protects tree_mod_seq_list */
1412 spinlock_t tree_mod_seq_lock;
1413 atomic_t tree_mod_seq;
1414 struct list_head tree_mod_seq_list;
1415 struct seq_list tree_mod_seq_elem;
1417 /* this protects tree_mod_log */
1418 rwlock_t tree_mod_log_lock;
1419 struct rb_root tree_mod_log;
1421 atomic_t nr_async_submits;
1422 atomic_t async_submit_draining;
1423 atomic_t nr_async_bios;
1424 atomic_t async_delalloc_pages;
1425 atomic_t open_ioctl_trans;
1428 * this is used by the balancing code to wait for all the pending
1431 spinlock_t ordered_extent_lock;
1434 * all of the data=ordered extents pending writeback
1435 * these can span multiple transactions and basically include
1436 * every dirty data page that isn't from nodatacow
1438 struct list_head ordered_extents;
1440 spinlock_t delalloc_lock;
1442 * all of the inodes that have delalloc bytes. It is possible for
1443 * this list to be empty even when there is still dirty data=ordered
1444 * extents waiting to finish IO.
1446 struct list_head delalloc_inodes;
1449 * there is a pool of worker threads for checksumming during writes
1450 * and a pool for checksumming after reads. This is because readers
1451 * can run with FS locks held, and the writers may be waiting for
1452 * those locks. We don't want ordering in the pending list to cause
1453 * deadlocks, and so the two are serviced separately.
1455 * A third pool does submit_bio to avoid deadlocking with the other
1458 struct btrfs_workers generic_worker;
1459 struct btrfs_workers workers;
1460 struct btrfs_workers delalloc_workers;
1461 struct btrfs_workers flush_workers;
1462 struct btrfs_workers endio_workers;
1463 struct btrfs_workers endio_meta_workers;
1464 struct btrfs_workers endio_raid56_workers;
1465 struct btrfs_workers rmw_workers;
1466 struct btrfs_workers endio_meta_write_workers;
1467 struct btrfs_workers endio_write_workers;
1468 struct btrfs_workers endio_freespace_worker;
1469 struct btrfs_workers submit_workers;
1470 struct btrfs_workers caching_workers;
1471 struct btrfs_workers readahead_workers;
1474 * fixup workers take dirty pages that didn't properly go through
1475 * the cow mechanism and make them safe to write. It happens
1476 * for the sys_munmap function call path
1478 struct btrfs_workers fixup_workers;
1479 struct btrfs_workers delayed_workers;
1480 struct task_struct *transaction_kthread;
1481 struct task_struct *cleaner_kthread;
1482 int thread_pool_size;
1484 struct kobject super_kobj;
1485 struct completion kobj_unregister;
1488 int log_root_recovering;
1494 /* used to keep from writing metadata until there is a nice batch */
1495 struct percpu_counter dirty_metadata_bytes;
1496 struct percpu_counter delalloc_bytes;
1497 s32 dirty_metadata_batch;
1500 struct list_head dirty_cowonly_roots;
1502 struct btrfs_fs_devices *fs_devices;
1505 * the space_info list is almost entirely read only. It only changes
1506 * when we add a new raid type to the FS, and that happens
1507 * very rarely. RCU is used to protect it.
1509 struct list_head space_info;
1511 struct btrfs_space_info *data_sinfo;
1513 struct reloc_control *reloc_ctl;
1515 /* data_alloc_cluster is only used in ssd mode */
1516 struct btrfs_free_cluster data_alloc_cluster;
1518 /* all metadata allocations go through this cluster */
1519 struct btrfs_free_cluster meta_alloc_cluster;
1521 /* auto defrag inodes go here */
1522 spinlock_t defrag_inodes_lock;
1523 struct rb_root defrag_inodes;
1524 atomic_t defrag_running;
1526 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1527 seqlock_t profiles_lock;
1529 * these three are in extended format (availability of single
1530 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1531 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1533 u64 avail_data_alloc_bits;
1534 u64 avail_metadata_alloc_bits;
1535 u64 avail_system_alloc_bits;
1537 /* restriper state */
1538 spinlock_t balance_lock;
1539 struct mutex balance_mutex;
1540 atomic_t balance_running;
1541 atomic_t balance_pause_req;
1542 atomic_t balance_cancel_req;
1543 struct btrfs_balance_control *balance_ctl;
1544 wait_queue_head_t balance_wait_q;
1546 unsigned data_chunk_allocations;
1547 unsigned metadata_ratio;
1551 /* private scrub information */
1552 struct mutex scrub_lock;
1553 atomic_t scrubs_running;
1554 atomic_t scrub_pause_req;
1555 atomic_t scrubs_paused;
1556 atomic_t scrub_cancel_req;
1557 wait_queue_head_t scrub_pause_wait;
1558 struct rw_semaphore scrub_super_lock;
1559 int scrub_workers_refcnt;
1560 struct btrfs_workers scrub_workers;
1561 struct btrfs_workers scrub_wr_completion_workers;
1562 struct btrfs_workers scrub_nocow_workers;
1564 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1565 u32 check_integrity_print_mask;
1570 unsigned int quota_enabled:1;
1573 * quota_enabled only changes state after a commit. This holds the
1576 unsigned int pending_quota_state:1;
1578 /* is qgroup tracking in a consistent state? */
1581 /* holds configuration and tracking. Protected by qgroup_lock */
1582 struct rb_root qgroup_tree;
1583 spinlock_t qgroup_lock;
1585 /* list of dirty qgroups to be written at next commit */
1586 struct list_head dirty_qgroups;
1588 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1591 /* filesystem state */
1592 unsigned long fs_state;
1594 struct btrfs_delayed_root *delayed_root;
1596 /* readahead tree */
1597 spinlock_t reada_lock;
1598 struct radix_tree_root reada_tree;
1600 /* next backup root to be overwritten */
1601 int backup_root_index;
1603 int num_tolerated_disk_barrier_failures;
1605 /* device replace state */
1606 struct btrfs_dev_replace dev_replace;
1608 atomic_t mutually_exclusive_operation_running;
1612 * in ram representation of the tree. extent_root is used for all allocations
1613 * and for the extent tree extent_root root.
1616 struct extent_buffer *node;
1618 struct extent_buffer *commit_root;
1619 struct btrfs_root *log_root;
1620 struct btrfs_root *reloc_root;
1622 struct btrfs_root_item root_item;
1623 struct btrfs_key root_key;
1624 struct btrfs_fs_info *fs_info;
1625 struct extent_io_tree dirty_log_pages;
1627 struct kobject root_kobj;
1628 struct completion kobj_unregister;
1629 struct mutex objectid_mutex;
1631 spinlock_t accounting_lock;
1632 struct btrfs_block_rsv *block_rsv;
1634 /* free ino cache stuff */
1635 struct mutex fs_commit_mutex;
1636 struct btrfs_free_space_ctl *free_ino_ctl;
1637 enum btrfs_caching_type cached;
1638 spinlock_t cache_lock;
1639 wait_queue_head_t cache_wait;
1640 struct btrfs_free_space_ctl *free_ino_pinned;
1642 struct inode *cache_inode;
1644 struct mutex log_mutex;
1645 wait_queue_head_t log_writer_wait;
1646 wait_queue_head_t log_commit_wait[2];
1647 atomic_t log_writers;
1648 atomic_t log_commit[2];
1650 unsigned long log_transid;
1651 unsigned long last_log_commit;
1652 pid_t log_start_pid;
1653 bool log_multiple_pids;
1658 /* data allocations are done in sectorsize units */
1661 /* node allocations are done in nodesize units */
1664 /* leaf allocations are done in leafsize units */
1671 u64 highest_objectid;
1673 /* btrfs_record_root_in_trans is a multi-step process,
1674 * and it can race with the balancing code. But the
1675 * race is very small, and only the first time the root
1676 * is added to each transaction. So in_trans_setup
1677 * is used to tell us when more checks are required
1679 unsigned long in_trans_setup;
1684 u64 defrag_trans_start;
1685 struct btrfs_key defrag_progress;
1686 struct btrfs_key defrag_max;
1690 /* the dirty list is only used by non-reference counted roots */
1691 struct list_head dirty_list;
1693 struct list_head root_list;
1695 spinlock_t log_extents_lock[2];
1696 struct list_head logged_list[2];
1698 spinlock_t orphan_lock;
1699 atomic_t orphan_inodes;
1700 struct btrfs_block_rsv *orphan_block_rsv;
1701 int orphan_item_inserted;
1702 int orphan_cleanup_state;
1704 spinlock_t inode_lock;
1705 /* red-black tree that keeps track of in-memory inodes */
1706 struct rb_root inode_tree;
1709 * radix tree that keeps track of delayed nodes of every inode,
1710 * protected by inode_lock
1712 struct radix_tree_root delayed_nodes_tree;
1714 * right now this just gets used so that a root has its own devid
1715 * for stat. It may be used for more later
1721 spinlock_t root_item_lock;
1724 struct btrfs_ioctl_defrag_range_args {
1725 /* start of the defrag operation */
1728 /* number of bytes to defrag, use (u64)-1 to say all */
1732 * flags for the operation, which can include turning
1733 * on compression for this one defrag
1738 * any extent bigger than this will be considered
1739 * already defragged. Use 0 to take the kernel default
1740 * Use 1 to say every single extent must be rewritten
1742 __u32 extent_thresh;
1745 * which compression method to use if turning on compression
1746 * for this defrag operation. If unspecified, zlib will
1749 __u32 compress_type;
1751 /* spare for later */
1757 * inode items have the data typically returned from stat and store other
1758 * info about object characteristics. There is one for every file and dir in
1761 #define BTRFS_INODE_ITEM_KEY 1
1762 #define BTRFS_INODE_REF_KEY 12
1763 #define BTRFS_INODE_EXTREF_KEY 13
1764 #define BTRFS_XATTR_ITEM_KEY 24
1765 #define BTRFS_ORPHAN_ITEM_KEY 48
1766 /* reserve 2-15 close to the inode for later flexibility */
1769 * dir items are the name -> inode pointers in a directory. There is one
1770 * for every name in a directory.
1772 #define BTRFS_DIR_LOG_ITEM_KEY 60
1773 #define BTRFS_DIR_LOG_INDEX_KEY 72
1774 #define BTRFS_DIR_ITEM_KEY 84
1775 #define BTRFS_DIR_INDEX_KEY 96
1777 * extent data is for file data
1779 #define BTRFS_EXTENT_DATA_KEY 108
1782 * extent csums are stored in a separate tree and hold csums for
1783 * an entire extent on disk.
1785 #define BTRFS_EXTENT_CSUM_KEY 128
1788 * root items point to tree roots. They are typically in the root
1789 * tree used by the super block to find all the other trees
1791 #define BTRFS_ROOT_ITEM_KEY 132
1794 * root backrefs tie subvols and snapshots to the directory entries that
1797 #define BTRFS_ROOT_BACKREF_KEY 144
1800 * root refs make a fast index for listing all of the snapshots and
1801 * subvolumes referenced by a given root. They point directly to the
1802 * directory item in the root that references the subvol
1804 #define BTRFS_ROOT_REF_KEY 156
1807 * extent items are in the extent map tree. These record which blocks
1808 * are used, and how many references there are to each block
1810 #define BTRFS_EXTENT_ITEM_KEY 168
1812 #define BTRFS_TREE_BLOCK_REF_KEY 176
1814 #define BTRFS_EXTENT_DATA_REF_KEY 178
1816 #define BTRFS_EXTENT_REF_V0_KEY 180
1818 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1820 #define BTRFS_SHARED_DATA_REF_KEY 184
1823 * block groups give us hints into the extent allocation trees. Which
1824 * blocks are free etc etc
1826 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1828 #define BTRFS_DEV_EXTENT_KEY 204
1829 #define BTRFS_DEV_ITEM_KEY 216
1830 #define BTRFS_CHUNK_ITEM_KEY 228
1833 * Records the overall state of the qgroups.
1834 * There's only one instance of this key present,
1835 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1837 #define BTRFS_QGROUP_STATUS_KEY 240
1839 * Records the currently used space of the qgroup.
1840 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1842 #define BTRFS_QGROUP_INFO_KEY 242
1844 * Contains the user configured limits for the qgroup.
1845 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1847 #define BTRFS_QGROUP_LIMIT_KEY 244
1849 * Records the child-parent relationship of qgroups. For
1850 * each relation, 2 keys are present:
1851 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1852 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1854 #define BTRFS_QGROUP_RELATION_KEY 246
1856 #define BTRFS_BALANCE_ITEM_KEY 248
1859 * Persistantly stores the io stats in the device tree.
1860 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1862 #define BTRFS_DEV_STATS_KEY 249
1865 * Persistantly stores the device replace state in the device tree.
1866 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1868 #define BTRFS_DEV_REPLACE_KEY 250
1871 * string items are for debugging. They just store a short string of
1874 #define BTRFS_STRING_ITEM_KEY 253
1877 * Flags for mount options.
1879 * Note: don't forget to add new options to btrfs_show_options()
1881 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1882 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1883 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1884 #define BTRFS_MOUNT_SSD (1 << 3)
1885 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1886 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1887 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1888 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1889 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1890 #define BTRFS_MOUNT_NOSSD (1 << 9)
1891 #define BTRFS_MOUNT_DISCARD (1 << 10)
1892 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1893 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1894 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1895 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1896 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1897 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1898 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1899 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1900 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1901 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1902 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1903 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1905 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1906 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1907 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1908 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1913 #define BTRFS_INODE_NODATASUM (1 << 0)
1914 #define BTRFS_INODE_NODATACOW (1 << 1)
1915 #define BTRFS_INODE_READONLY (1 << 2)
1916 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1917 #define BTRFS_INODE_PREALLOC (1 << 4)
1918 #define BTRFS_INODE_SYNC (1 << 5)
1919 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1920 #define BTRFS_INODE_APPEND (1 << 7)
1921 #define BTRFS_INODE_NODUMP (1 << 8)
1922 #define BTRFS_INODE_NOATIME (1 << 9)
1923 #define BTRFS_INODE_DIRSYNC (1 << 10)
1924 #define BTRFS_INODE_COMPRESS (1 << 11)
1926 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1928 struct btrfs_map_token {
1929 struct extent_buffer *eb;
1931 unsigned long offset;
1934 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1936 token->kaddr = NULL;
1939 /* some macros to generate set/get funcs for the struct fields. This
1940 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1943 #define le8_to_cpu(v) (v)
1944 #define cpu_to_le8(v) (v)
1947 #define read_eb_member(eb, ptr, type, member, result) ( \
1948 read_extent_buffer(eb, (char *)(result), \
1949 ((unsigned long)(ptr)) + \
1950 offsetof(type, member), \
1951 sizeof(((type *)0)->member)))
1953 #define write_eb_member(eb, ptr, type, member, result) ( \
1954 write_extent_buffer(eb, (char *)(result), \
1955 ((unsigned long)(ptr)) + \
1956 offsetof(type, member), \
1957 sizeof(((type *)0)->member)))
1959 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1960 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1961 unsigned long off, \
1962 struct btrfs_map_token *token); \
1963 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1964 unsigned long off, u##bits val, \
1965 struct btrfs_map_token *token); \
1966 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1967 unsigned long off) \
1969 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1971 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1972 unsigned long off, u##bits val) \
1974 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1977 DECLARE_BTRFS_SETGET_BITS(8)
1978 DECLARE_BTRFS_SETGET_BITS(16)
1979 DECLARE_BTRFS_SETGET_BITS(32)
1980 DECLARE_BTRFS_SETGET_BITS(64)
1982 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1983 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1985 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1986 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1988 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1991 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1992 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1994 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1995 struct btrfs_map_token *token) \
1997 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1998 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2000 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2001 type *s, u##bits val, \
2002 struct btrfs_map_token *token) \
2004 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2005 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2008 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2009 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2011 type *p = page_address(eb->pages[0]); \
2012 u##bits res = le##bits##_to_cpu(p->member); \
2015 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2018 type *p = page_address(eb->pages[0]); \
2019 p->member = cpu_to_le##bits(val); \
2022 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2023 static inline u##bits btrfs_##name(type *s) \
2025 return le##bits##_to_cpu(s->member); \
2027 static inline void btrfs_set_##name(type *s, u##bits val) \
2029 s->member = cpu_to_le##bits(val); \
2032 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2033 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2034 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2035 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2036 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2037 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2039 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2040 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2041 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2042 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2043 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2044 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2046 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2047 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2049 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2051 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2053 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2055 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2057 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2058 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2060 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2062 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2064 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2067 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
2069 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
2072 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
2074 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
2077 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2078 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2079 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2080 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2081 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2082 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2083 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2084 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2085 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2086 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2087 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2089 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2091 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2094 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2095 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2096 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2098 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2100 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2102 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2104 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2105 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2107 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2109 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2110 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2112 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2115 unsigned long offset = (unsigned long)c;
2116 offset += offsetof(struct btrfs_chunk, stripe);
2117 offset += nr * sizeof(struct btrfs_stripe);
2118 return (struct btrfs_stripe *)offset;
2121 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2123 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2126 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2127 struct btrfs_chunk *c, int nr)
2129 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2132 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2133 struct btrfs_chunk *c, int nr)
2135 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2138 /* struct btrfs_block_group_item */
2139 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2141 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2143 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2144 struct btrfs_block_group_item, chunk_objectid, 64);
2146 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2147 struct btrfs_block_group_item, chunk_objectid, 64);
2148 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2149 struct btrfs_block_group_item, flags, 64);
2150 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2151 struct btrfs_block_group_item, flags, 64);
2153 /* struct btrfs_inode_ref */
2154 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2155 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2157 /* struct btrfs_inode_extref */
2158 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2159 parent_objectid, 64);
2160 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2162 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2164 /* struct btrfs_inode_item */
2165 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2166 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2167 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2168 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2169 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2170 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2171 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2172 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2173 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2174 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2175 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2176 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2178 static inline struct btrfs_timespec *
2179 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
2181 unsigned long ptr = (unsigned long)inode_item;
2182 ptr += offsetof(struct btrfs_inode_item, atime);
2183 return (struct btrfs_timespec *)ptr;
2186 static inline struct btrfs_timespec *
2187 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
2189 unsigned long ptr = (unsigned long)inode_item;
2190 ptr += offsetof(struct btrfs_inode_item, mtime);
2191 return (struct btrfs_timespec *)ptr;
2194 static inline struct btrfs_timespec *
2195 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
2197 unsigned long ptr = (unsigned long)inode_item;
2198 ptr += offsetof(struct btrfs_inode_item, ctime);
2199 return (struct btrfs_timespec *)ptr;
2202 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2203 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2205 /* struct btrfs_dev_extent */
2206 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2208 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2209 chunk_objectid, 64);
2210 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2212 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2214 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2216 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2217 return (u8 *)((unsigned long)dev + ptr);
2220 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2221 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2223 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2225 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2228 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2230 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2231 struct btrfs_tree_block_info *item,
2232 struct btrfs_disk_key *key)
2234 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2237 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2238 struct btrfs_tree_block_info *item,
2239 struct btrfs_disk_key *key)
2241 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2244 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2246 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2248 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2250 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2253 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2256 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2258 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2261 static inline u32 btrfs_extent_inline_ref_size(int type)
2263 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2264 type == BTRFS_SHARED_BLOCK_REF_KEY)
2265 return sizeof(struct btrfs_extent_inline_ref);
2266 if (type == BTRFS_SHARED_DATA_REF_KEY)
2267 return sizeof(struct btrfs_shared_data_ref) +
2268 sizeof(struct btrfs_extent_inline_ref);
2269 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2270 return sizeof(struct btrfs_extent_data_ref) +
2271 offsetof(struct btrfs_extent_inline_ref, offset);
2276 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2277 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2279 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2280 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2282 /* struct btrfs_node */
2283 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2284 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2286 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2289 ptr = offsetof(struct btrfs_node, ptrs) +
2290 sizeof(struct btrfs_key_ptr) * nr;
2291 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2294 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2298 ptr = offsetof(struct btrfs_node, ptrs) +
2299 sizeof(struct btrfs_key_ptr) * nr;
2300 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2303 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2306 ptr = offsetof(struct btrfs_node, ptrs) +
2307 sizeof(struct btrfs_key_ptr) * nr;
2308 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2311 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2315 ptr = offsetof(struct btrfs_node, ptrs) +
2316 sizeof(struct btrfs_key_ptr) * nr;
2317 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2320 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2322 return offsetof(struct btrfs_node, ptrs) +
2323 sizeof(struct btrfs_key_ptr) * nr;
2326 void btrfs_node_key(struct extent_buffer *eb,
2327 struct btrfs_disk_key *disk_key, int nr);
2329 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2330 struct btrfs_disk_key *disk_key, int nr)
2333 ptr = btrfs_node_key_ptr_offset(nr);
2334 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2335 struct btrfs_key_ptr, key, disk_key);
2338 /* struct btrfs_item */
2339 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2340 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2342 static inline unsigned long btrfs_item_nr_offset(int nr)
2344 return offsetof(struct btrfs_leaf, items) +
2345 sizeof(struct btrfs_item) * nr;
2348 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
2351 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2354 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2355 struct btrfs_item *item)
2357 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2360 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2362 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
2365 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2367 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
2370 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2372 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
2375 static inline void btrfs_item_key(struct extent_buffer *eb,
2376 struct btrfs_disk_key *disk_key, int nr)
2378 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2379 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2382 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2383 struct btrfs_disk_key *disk_key, int nr)
2385 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2386 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2389 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2392 * struct btrfs_root_ref
2394 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2395 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2396 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2398 /* struct btrfs_dir_item */
2399 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2400 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2401 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2402 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2404 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2405 struct btrfs_dir_item *item,
2406 struct btrfs_disk_key *key)
2408 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2411 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2412 struct btrfs_dir_item *item,
2413 struct btrfs_disk_key *key)
2415 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2418 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2420 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2422 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2425 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2426 struct btrfs_free_space_header *h,
2427 struct btrfs_disk_key *key)
2429 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2432 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2433 struct btrfs_free_space_header *h,
2434 struct btrfs_disk_key *key)
2436 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2439 /* struct btrfs_disk_key */
2440 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2442 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2443 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2445 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2446 struct btrfs_disk_key *disk)
2448 cpu->offset = le64_to_cpu(disk->offset);
2449 cpu->type = disk->type;
2450 cpu->objectid = le64_to_cpu(disk->objectid);
2453 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2454 struct btrfs_key *cpu)
2456 disk->offset = cpu_to_le64(cpu->offset);
2457 disk->type = cpu->type;
2458 disk->objectid = cpu_to_le64(cpu->objectid);
2461 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2462 struct btrfs_key *key, int nr)
2464 struct btrfs_disk_key disk_key;
2465 btrfs_node_key(eb, &disk_key, nr);
2466 btrfs_disk_key_to_cpu(key, &disk_key);
2469 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2470 struct btrfs_key *key, int nr)
2472 struct btrfs_disk_key disk_key;
2473 btrfs_item_key(eb, &disk_key, nr);
2474 btrfs_disk_key_to_cpu(key, &disk_key);
2477 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2478 struct btrfs_dir_item *item,
2479 struct btrfs_key *key)
2481 struct btrfs_disk_key disk_key;
2482 btrfs_dir_item_key(eb, item, &disk_key);
2483 btrfs_disk_key_to_cpu(key, &disk_key);
2487 static inline u8 btrfs_key_type(struct btrfs_key *key)
2492 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2497 /* struct btrfs_header */
2498 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2499 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2501 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2502 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2503 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2504 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2506 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2508 return (btrfs_header_flags(eb) & flag) == flag;
2511 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2513 u64 flags = btrfs_header_flags(eb);
2514 btrfs_set_header_flags(eb, flags | flag);
2515 return (flags & flag) == flag;
2518 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2520 u64 flags = btrfs_header_flags(eb);
2521 btrfs_set_header_flags(eb, flags & ~flag);
2522 return (flags & flag) == flag;
2525 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2527 u64 flags = btrfs_header_flags(eb);
2528 return flags >> BTRFS_BACKREF_REV_SHIFT;
2531 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2534 u64 flags = btrfs_header_flags(eb);
2535 flags &= ~BTRFS_BACKREF_REV_MASK;
2536 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2537 btrfs_set_header_flags(eb, flags);
2540 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
2542 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2546 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2548 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2552 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2554 return btrfs_header_level(eb) == 0;
2557 /* struct btrfs_root_item */
2558 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2560 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2561 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2562 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2564 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2566 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2567 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2568 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2569 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2570 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2571 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2572 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2573 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2575 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2577 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2579 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2581 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2583 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2586 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2588 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2591 /* struct btrfs_root_backup */
2592 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2594 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2596 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2597 tree_root_level, 8);
2599 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2601 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2602 chunk_root_gen, 64);
2603 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2604 chunk_root_level, 8);
2606 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2608 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2609 extent_root_gen, 64);
2610 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2611 extent_root_level, 8);
2613 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2615 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2617 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2620 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2622 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2624 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2627 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2629 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2631 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2632 csum_root_level, 8);
2633 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2635 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2637 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2640 /* struct btrfs_balance_item */
2641 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2643 static inline void btrfs_balance_data(struct extent_buffer *eb,
2644 struct btrfs_balance_item *bi,
2645 struct btrfs_disk_balance_args *ba)
2647 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2650 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2651 struct btrfs_balance_item *bi,
2652 struct btrfs_disk_balance_args *ba)
2654 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2657 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2658 struct btrfs_balance_item *bi,
2659 struct btrfs_disk_balance_args *ba)
2661 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2664 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2665 struct btrfs_balance_item *bi,
2666 struct btrfs_disk_balance_args *ba)
2668 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2671 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2672 struct btrfs_balance_item *bi,
2673 struct btrfs_disk_balance_args *ba)
2675 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2678 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2679 struct btrfs_balance_item *bi,
2680 struct btrfs_disk_balance_args *ba)
2682 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2686 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2687 struct btrfs_disk_balance_args *disk)
2689 memset(cpu, 0, sizeof(*cpu));
2691 cpu->profiles = le64_to_cpu(disk->profiles);
2692 cpu->usage = le64_to_cpu(disk->usage);
2693 cpu->devid = le64_to_cpu(disk->devid);
2694 cpu->pstart = le64_to_cpu(disk->pstart);
2695 cpu->pend = le64_to_cpu(disk->pend);
2696 cpu->vstart = le64_to_cpu(disk->vstart);
2697 cpu->vend = le64_to_cpu(disk->vend);
2698 cpu->target = le64_to_cpu(disk->target);
2699 cpu->flags = le64_to_cpu(disk->flags);
2703 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2704 struct btrfs_balance_args *cpu)
2706 memset(disk, 0, sizeof(*disk));
2708 disk->profiles = cpu_to_le64(cpu->profiles);
2709 disk->usage = cpu_to_le64(cpu->usage);
2710 disk->devid = cpu_to_le64(cpu->devid);
2711 disk->pstart = cpu_to_le64(cpu->pstart);
2712 disk->pend = cpu_to_le64(cpu->pend);
2713 disk->vstart = cpu_to_le64(cpu->vstart);
2714 disk->vend = cpu_to_le64(cpu->vend);
2715 disk->target = cpu_to_le64(cpu->target);
2716 disk->flags = cpu_to_le64(cpu->flags);
2719 /* struct btrfs_super_block */
2720 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2721 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2722 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2724 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2725 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2726 struct btrfs_super_block, sys_chunk_array_size, 32);
2727 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2728 struct btrfs_super_block, chunk_root_generation, 64);
2729 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2731 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2733 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2734 chunk_root_level, 8);
2735 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2737 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2738 log_root_transid, 64);
2739 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2741 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2743 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2745 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2747 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2749 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2751 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2753 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2754 root_dir_objectid, 64);
2755 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2757 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2759 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2760 compat_ro_flags, 64);
2761 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2762 incompat_flags, 64);
2763 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2765 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2766 cache_generation, 64);
2768 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2770 int t = btrfs_super_csum_type(s);
2771 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2772 return btrfs_csum_sizes[t];
2775 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2777 return offsetof(struct btrfs_leaf, items);
2780 /* struct btrfs_file_extent_item */
2781 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2783 static inline unsigned long
2784 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2786 unsigned long offset = (unsigned long)e;
2787 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2791 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2793 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2796 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2798 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2800 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2801 disk_num_bytes, 64);
2802 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2804 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2806 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2808 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2810 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2812 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2813 other_encoding, 16);
2815 /* this returns the number of file bytes represented by the inline item.
2816 * If an item is compressed, this is the uncompressed size
2818 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2819 struct btrfs_file_extent_item *e)
2821 return btrfs_file_extent_ram_bytes(eb, e);
2825 * this returns the number of bytes used by the item on disk, minus the
2826 * size of any extent headers. If a file is compressed on disk, this is
2827 * the compressed size
2829 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2830 struct btrfs_item *e)
2832 unsigned long offset;
2833 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2834 return btrfs_item_size(eb, e) - offset;
2837 /* btrfs_dev_stats_item */
2838 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2839 struct btrfs_dev_stats_item *ptr,
2844 read_extent_buffer(eb, &val,
2845 offsetof(struct btrfs_dev_stats_item, values) +
2846 ((unsigned long)ptr) + (index * sizeof(u64)),
2851 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2852 struct btrfs_dev_stats_item *ptr,
2855 write_extent_buffer(eb, &val,
2856 offsetof(struct btrfs_dev_stats_item, values) +
2857 ((unsigned long)ptr) + (index * sizeof(u64)),
2861 /* btrfs_qgroup_status_item */
2862 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2864 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2866 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2868 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2871 /* btrfs_qgroup_info_item */
2872 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2874 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2875 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2877 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2878 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2881 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2882 struct btrfs_qgroup_info_item, generation, 64);
2883 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2885 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2886 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2887 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2889 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2890 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2892 /* btrfs_qgroup_limit_item */
2893 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2895 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2897 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2899 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2901 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2904 /* btrfs_dev_replace_item */
2905 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2906 struct btrfs_dev_replace_item, src_devid, 64);
2907 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2908 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2910 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2912 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2914 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2916 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2917 num_write_errors, 64);
2918 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2919 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2921 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2923 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2926 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2927 struct btrfs_dev_replace_item, src_devid, 64);
2928 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2929 struct btrfs_dev_replace_item,
2930 cont_reading_from_srcdev_mode, 64);
2931 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2932 struct btrfs_dev_replace_item, replace_state, 64);
2933 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2934 struct btrfs_dev_replace_item, time_started, 64);
2935 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2936 struct btrfs_dev_replace_item, time_stopped, 64);
2937 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2938 struct btrfs_dev_replace_item, num_write_errors, 64);
2939 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2940 struct btrfs_dev_replace_item,
2941 num_uncorrectable_read_errors, 64);
2942 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2943 struct btrfs_dev_replace_item, cursor_left, 64);
2944 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2945 struct btrfs_dev_replace_item, cursor_right, 64);
2947 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
2949 return sb->s_fs_info;
2952 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2955 return root->leafsize;
2956 return root->nodesize;
2959 /* helper function to cast into the data area of the leaf. */
2960 #define btrfs_item_ptr(leaf, slot, type) \
2961 ((type *)(btrfs_leaf_data(leaf) + \
2962 btrfs_item_offset_nr(leaf, slot)))
2964 #define btrfs_item_ptr_offset(leaf, slot) \
2965 ((unsigned long)(btrfs_leaf_data(leaf) + \
2966 btrfs_item_offset_nr(leaf, slot)))
2968 static inline struct dentry *fdentry(struct file *file)
2970 return file->f_path.dentry;
2973 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2975 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2976 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2979 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2981 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2985 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2988 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2993 * Doing a truncate won't result in new nodes or leaves, just what we need for
2996 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2999 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3003 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3004 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3005 struct btrfs_root *root, unsigned long count);
3006 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
3007 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3008 struct btrfs_root *root, u64 bytenr,
3009 u64 num_bytes, u64 *refs, u64 *flags);
3010 int btrfs_pin_extent(struct btrfs_root *root,
3011 u64 bytenr, u64 num, int reserved);
3012 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3013 u64 bytenr, u64 num_bytes);
3014 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3015 struct btrfs_root *root,
3016 u64 objectid, u64 offset, u64 bytenr);
3017 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3018 struct btrfs_fs_info *info,
3020 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3021 u64 btrfs_find_block_group(struct btrfs_root *root,
3022 u64 search_start, u64 search_hint, int owner);
3023 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
3024 struct btrfs_root *root, u32 blocksize,
3025 u64 parent, u64 root_objectid,
3026 struct btrfs_disk_key *key, int level,
3027 u64 hint, u64 empty_size);
3028 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3029 struct btrfs_root *root,
3030 struct extent_buffer *buf,
3031 u64 parent, int last_ref);
3032 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
3033 struct btrfs_root *root,
3034 u64 bytenr, u32 blocksize,
3036 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3037 struct btrfs_root *root,
3038 u64 root_objectid, u64 owner,
3039 u64 offset, struct btrfs_key *ins);
3040 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3041 struct btrfs_root *root,
3042 u64 root_objectid, u64 owner, u64 offset,
3043 struct btrfs_key *ins);
3044 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
3045 struct btrfs_root *root,
3046 u64 num_bytes, u64 min_alloc_size,
3047 u64 empty_size, u64 hint_byte,
3048 struct btrfs_key *ins, u64 data);
3049 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3050 struct extent_buffer *buf, int full_backref, int for_cow);
3051 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3052 struct extent_buffer *buf, int full_backref, int for_cow);
3053 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3054 struct btrfs_root *root,
3055 u64 bytenr, u64 num_bytes, u64 flags,
3057 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3058 struct btrfs_root *root,
3059 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3060 u64 owner, u64 offset, int for_cow);
3062 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
3063 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3064 u64 start, u64 len);
3065 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3066 struct btrfs_root *root);
3067 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3068 struct btrfs_root *root);
3069 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3070 struct btrfs_root *root,
3071 u64 bytenr, u64 num_bytes, u64 parent,
3072 u64 root_objectid, u64 owner, u64 offset, int for_cow);
3074 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3075 struct btrfs_root *root);
3076 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3077 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3078 int btrfs_read_block_groups(struct btrfs_root *root);
3079 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3080 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3081 struct btrfs_root *root, u64 bytes_used,
3082 u64 type, u64 chunk_objectid, u64 chunk_offset,
3084 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3085 struct btrfs_root *root, u64 group_start);
3086 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3087 struct btrfs_root *root);
3088 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
3089 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3090 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3092 enum btrfs_reserve_flush_enum {
3093 /* If we are in the transaction, we can't flush anything.*/
3094 BTRFS_RESERVE_NO_FLUSH,
3096 * Flushing delalloc may cause deadlock somewhere, in this
3097 * case, use FLUSH LIMIT
3099 BTRFS_RESERVE_FLUSH_LIMIT,
3100 BTRFS_RESERVE_FLUSH_ALL,
3103 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
3104 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3105 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3106 struct btrfs_root *root);
3107 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3108 struct inode *inode);
3109 void btrfs_orphan_release_metadata(struct inode *inode);
3110 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3111 struct btrfs_block_rsv *rsv,
3113 u64 *qgroup_reserved);
3114 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3115 struct btrfs_block_rsv *rsv,
3116 u64 qgroup_reserved);
3117 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3118 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3119 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3120 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3121 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3122 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3123 unsigned short type);
3124 void btrfs_free_block_rsv(struct btrfs_root *root,
3125 struct btrfs_block_rsv *rsv);
3126 int btrfs_block_rsv_add(struct btrfs_root *root,
3127 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3128 enum btrfs_reserve_flush_enum flush);
3129 int btrfs_block_rsv_check(struct btrfs_root *root,
3130 struct btrfs_block_rsv *block_rsv, int min_factor);
3131 int btrfs_block_rsv_refill(struct btrfs_root *root,
3132 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3133 enum btrfs_reserve_flush_enum flush);
3134 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3135 struct btrfs_block_rsv *dst_rsv,
3137 void btrfs_block_rsv_release(struct btrfs_root *root,
3138 struct btrfs_block_rsv *block_rsv,
3140 int btrfs_set_block_group_ro(struct btrfs_root *root,
3141 struct btrfs_block_group_cache *cache);
3142 void btrfs_set_block_group_rw(struct btrfs_root *root,
3143 struct btrfs_block_group_cache *cache);
3144 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3145 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3146 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3147 u64 start, u64 end);
3148 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
3149 u64 num_bytes, u64 *actual_bytes);
3150 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3151 struct btrfs_root *root, u64 type);
3152 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3154 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3155 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3156 struct btrfs_fs_info *fs_info);
3157 int __get_raid_index(u64 flags);
3159 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3160 int level, int *slot);
3161 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3162 int btrfs_previous_item(struct btrfs_root *root,
3163 struct btrfs_path *path, u64 min_objectid,
3165 void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
3166 struct btrfs_root *root, struct btrfs_path *path,
3167 struct btrfs_key *new_key);
3168 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3169 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3170 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3171 struct btrfs_key *key, int lowest_level,
3173 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3174 struct btrfs_key *max_key,
3175 struct btrfs_path *path,
3177 enum btrfs_compare_tree_result {
3178 BTRFS_COMPARE_TREE_NEW,
3179 BTRFS_COMPARE_TREE_DELETED,
3180 BTRFS_COMPARE_TREE_CHANGED,
3182 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3183 struct btrfs_root *right_root,
3184 struct btrfs_path *left_path,
3185 struct btrfs_path *right_path,
3186 struct btrfs_key *key,
3187 enum btrfs_compare_tree_result result,
3189 int btrfs_compare_trees(struct btrfs_root *left_root,
3190 struct btrfs_root *right_root,
3191 btrfs_changed_cb_t cb, void *ctx);
3192 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3193 struct btrfs_root *root, struct extent_buffer *buf,
3194 struct extent_buffer *parent, int parent_slot,
3195 struct extent_buffer **cow_ret);
3196 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3197 struct btrfs_root *root,
3198 struct extent_buffer *buf,
3199 struct extent_buffer **cow_ret, u64 new_root_objectid);
3200 int btrfs_block_can_be_shared(struct btrfs_root *root,
3201 struct extent_buffer *buf);
3202 void btrfs_extend_item(struct btrfs_trans_handle *trans,
3203 struct btrfs_root *root, struct btrfs_path *path,
3205 void btrfs_truncate_item(struct btrfs_trans_handle *trans,
3206 struct btrfs_root *root,
3207 struct btrfs_path *path,
3208 u32 new_size, int from_end);
3209 int btrfs_split_item(struct btrfs_trans_handle *trans,
3210 struct btrfs_root *root,
3211 struct btrfs_path *path,
3212 struct btrfs_key *new_key,
3213 unsigned long split_offset);
3214 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3215 struct btrfs_root *root,
3216 struct btrfs_path *path,
3217 struct btrfs_key *new_key);
3218 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3219 *root, struct btrfs_key *key, struct btrfs_path *p, int
3221 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3222 struct btrfs_path *p, u64 time_seq);
3223 int btrfs_search_slot_for_read(struct btrfs_root *root,
3224 struct btrfs_key *key, struct btrfs_path *p,
3225 int find_higher, int return_any);
3226 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3227 struct btrfs_root *root, struct extent_buffer *parent,
3228 int start_slot, u64 *last_ret,
3229 struct btrfs_key *progress);
3230 void btrfs_release_path(struct btrfs_path *p);
3231 struct btrfs_path *btrfs_alloc_path(void);
3232 void btrfs_free_path(struct btrfs_path *p);
3233 void btrfs_set_path_blocking(struct btrfs_path *p);
3234 void btrfs_clear_path_blocking(struct btrfs_path *p,
3235 struct extent_buffer *held, int held_rw);
3236 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3238 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3239 struct btrfs_path *path, int slot, int nr);
3240 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3241 struct btrfs_root *root,
3242 struct btrfs_path *path)
3244 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3247 void setup_items_for_insert(struct btrfs_trans_handle *trans,
3248 struct btrfs_root *root, struct btrfs_path *path,
3249 struct btrfs_key *cpu_key, u32 *data_size,
3250 u32 total_data, u32 total_size, int nr);
3251 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3252 *root, struct btrfs_key *key, void *data, u32 data_size);
3253 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3254 struct btrfs_root *root,
3255 struct btrfs_path *path,
3256 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3258 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3259 struct btrfs_root *root,
3260 struct btrfs_path *path,
3261 struct btrfs_key *key,
3264 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3267 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3268 int btrfs_next_leaf_write(struct btrfs_trans_handle *trans,
3269 struct btrfs_root *root, struct btrfs_path *path,
3271 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3273 static inline int btrfs_next_old_item(struct btrfs_root *root,
3274 struct btrfs_path *p, u64 time_seq)
3277 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3278 return btrfs_next_old_leaf(root, p, time_seq);
3281 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3283 return btrfs_next_old_item(root, p, 0);
3285 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3286 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3287 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3288 struct btrfs_block_rsv *block_rsv,
3289 int update_ref, int for_reloc);
3290 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3291 struct btrfs_root *root,
3292 struct extent_buffer *node,
3293 struct extent_buffer *parent);
3294 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3297 * Get synced with close_ctree()
3300 return fs_info->closing;
3302 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3304 kfree(fs_info->balance_ctl);
3305 kfree(fs_info->delayed_root);
3306 kfree(fs_info->extent_root);
3307 kfree(fs_info->tree_root);
3308 kfree(fs_info->chunk_root);
3309 kfree(fs_info->dev_root);
3310 kfree(fs_info->csum_root);
3311 kfree(fs_info->quota_root);
3312 kfree(fs_info->super_copy);
3313 kfree(fs_info->super_for_commit);
3317 /* tree mod log functions from ctree.c */
3318 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3319 struct seq_list *elem);
3320 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3321 struct seq_list *elem);
3322 static inline u64 btrfs_inc_tree_mod_seq(struct btrfs_fs_info *fs_info)
3324 return atomic_inc_return(&fs_info->tree_mod_seq);
3326 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3329 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3330 struct btrfs_path *path,
3331 u64 root_id, u64 ref_id);
3332 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3333 struct btrfs_root *tree_root,
3334 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3335 const char *name, int name_len);
3336 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3337 struct btrfs_root *tree_root,
3338 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3339 const char *name, int name_len);
3340 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3341 struct btrfs_key *key);
3342 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3343 *root, struct btrfs_key *key, struct btrfs_root_item
3345 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3346 struct btrfs_root *root,
3347 struct btrfs_key *key,
3348 struct btrfs_root_item *item);
3349 void btrfs_read_root_item(struct btrfs_root *root,
3350 struct extent_buffer *eb, int slot,
3351 struct btrfs_root_item *item);
3352 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
3353 btrfs_root_item *item, struct btrfs_key *key);
3354 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
3355 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3356 void btrfs_set_root_node(struct btrfs_root_item *item,
3357 struct extent_buffer *node);
3358 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3359 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3360 struct btrfs_root *root);
3363 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3364 const char *name, int name_len);
3365 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3366 struct btrfs_root *root, const char *name,
3367 int name_len, struct inode *dir,
3368 struct btrfs_key *location, u8 type, u64 index);
3369 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3370 struct btrfs_root *root,
3371 struct btrfs_path *path, u64 dir,
3372 const char *name, int name_len,
3374 struct btrfs_dir_item *
3375 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3376 struct btrfs_root *root,
3377 struct btrfs_path *path, u64 dir,
3378 u64 objectid, const char *name, int name_len,
3380 struct btrfs_dir_item *
3381 btrfs_search_dir_index_item(struct btrfs_root *root,
3382 struct btrfs_path *path, u64 dirid,
3383 const char *name, int name_len);
3384 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3385 struct btrfs_path *path,
3386 const char *name, int name_len);
3387 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3388 struct btrfs_root *root,
3389 struct btrfs_path *path,
3390 struct btrfs_dir_item *di);
3391 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3392 struct btrfs_root *root,
3393 struct btrfs_path *path, u64 objectid,
3394 const char *name, u16 name_len,
3395 const void *data, u16 data_len);
3396 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3397 struct btrfs_root *root,
3398 struct btrfs_path *path, u64 dir,
3399 const char *name, u16 name_len,
3401 int verify_dir_item(struct btrfs_root *root,
3402 struct extent_buffer *leaf,
3403 struct btrfs_dir_item *dir_item);
3406 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3407 struct btrfs_root *root, u64 offset);
3408 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3409 struct btrfs_root *root, u64 offset);
3410 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3413 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3414 struct btrfs_root *root,
3415 const char *name, int name_len,
3416 u64 inode_objectid, u64 ref_objectid, u64 index);
3417 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3418 struct btrfs_root *root,
3419 const char *name, int name_len,
3420 u64 inode_objectid, u64 ref_objectid, u64 *index);
3421 int btrfs_get_inode_ref_index(struct btrfs_trans_handle *trans,
3422 struct btrfs_root *root,
3423 struct btrfs_path *path,
3424 const char *name, int name_len,
3425 u64 inode_objectid, u64 ref_objectid, int mod,
3427 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3428 struct btrfs_root *root,
3429 struct btrfs_path *path, u64 objectid);
3430 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3431 *root, struct btrfs_path *path,
3432 struct btrfs_key *location, int mod);
3434 struct btrfs_inode_extref *
3435 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3436 struct btrfs_root *root,
3437 struct btrfs_path *path,
3438 const char *name, int name_len,
3439 u64 inode_objectid, u64 ref_objectid, int ins_len,
3442 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3443 u64 ref_objectid, const char *name,
3445 struct btrfs_inode_extref **extref_ret);
3448 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3449 struct btrfs_root *root, u64 bytenr, u64 len);
3450 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3451 struct bio *bio, u32 *dst);
3452 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3453 struct bio *bio, u64 logical_offset);
3454 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3455 struct btrfs_root *root,
3456 u64 objectid, u64 pos,
3457 u64 disk_offset, u64 disk_num_bytes,
3458 u64 num_bytes, u64 offset, u64 ram_bytes,
3459 u8 compression, u8 encryption, u16 other_encoding);
3460 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3461 struct btrfs_root *root,
3462 struct btrfs_path *path, u64 objectid,
3463 u64 bytenr, int mod);
3464 u64 btrfs_file_extent_length(struct btrfs_path *path);
3465 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3466 struct btrfs_root *root,
3467 struct btrfs_ordered_sum *sums);
3468 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3469 struct bio *bio, u64 file_start, int contig);
3470 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
3471 struct btrfs_root *root,
3472 struct btrfs_path *path,
3473 u64 bytenr, int cow);
3474 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
3475 struct btrfs_root *root, struct btrfs_path *path,
3477 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3478 struct list_head *list, int search_commit);
3480 struct btrfs_delalloc_work {
3481 struct inode *inode;
3484 struct completion completion;
3485 struct list_head list;
3486 struct btrfs_work work;
3489 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3490 int wait, int delay_iput);
3491 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3493 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3494 size_t pg_offset, u64 start, u64 len,
3497 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3498 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3499 #define ClearPageChecked ClearPageFsMisc
3500 #define SetPageChecked SetPageFsMisc
3501 #define PageChecked PageFsMisc
3504 /* This forces readahead on a given range of bytes in an inode */
3505 static inline void btrfs_force_ra(struct address_space *mapping,
3506 struct file_ra_state *ra, struct file *file,
3507 pgoff_t offset, unsigned long req_size)
3509 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3512 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3513 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3514 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3515 struct btrfs_root *root,
3516 struct inode *dir, struct inode *inode,
3517 const char *name, int name_len);
3518 int btrfs_add_link(struct btrfs_trans_handle *trans,
3519 struct inode *parent_inode, struct inode *inode,
3520 const char *name, int name_len, int add_backref, u64 index);
3521 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3522 struct btrfs_root *root,
3523 struct inode *dir, u64 objectid,
3524 const char *name, int name_len);
3525 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3527 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3528 struct btrfs_root *root,
3529 struct inode *inode, u64 new_size,
3532 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3533 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3534 struct extent_state **cached_state);
3535 int btrfs_writepages(struct address_space *mapping,
3536 struct writeback_control *wbc);
3537 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3538 struct btrfs_root *new_root, u64 new_dirid);
3539 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3540 size_t size, struct bio *bio,
3541 unsigned long bio_flags);
3542 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3543 int btrfs_readpage(struct file *file, struct page *page);
3544 void btrfs_evict_inode(struct inode *inode);
3545 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3546 int btrfs_dirty_inode(struct inode *inode);
3547 struct inode *btrfs_alloc_inode(struct super_block *sb);
3548 void btrfs_destroy_inode(struct inode *inode);
3549 int btrfs_drop_inode(struct inode *inode);
3550 int btrfs_init_cachep(void);
3551 void btrfs_destroy_cachep(void);
3552 long btrfs_ioctl_trans_end(struct file *file);
3553 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3554 struct btrfs_root *root, int *was_new);
3555 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3556 size_t pg_offset, u64 start, u64 end,
3558 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3559 struct btrfs_root *root,
3560 struct inode *inode);
3561 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3562 struct btrfs_root *root, struct inode *inode);
3563 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3564 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
3565 int btrfs_orphan_cleanup(struct btrfs_root *root);
3566 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3567 struct btrfs_root *root);
3568 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3569 void btrfs_invalidate_inodes(struct btrfs_root *root);
3570 void btrfs_add_delayed_iput(struct inode *inode);
3571 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3572 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3573 u64 start, u64 num_bytes, u64 min_size,
3574 loff_t actual_len, u64 *alloc_hint);
3575 int btrfs_prealloc_file_range_trans(struct inode *inode,
3576 struct btrfs_trans_handle *trans, int mode,
3577 u64 start, u64 num_bytes, u64 min_size,
3578 loff_t actual_len, u64 *alloc_hint);
3579 extern const struct dentry_operations btrfs_dentry_operations;
3582 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3583 void btrfs_update_iflags(struct inode *inode);
3584 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3585 int btrfs_defrag_file(struct inode *inode, struct file *file,
3586 struct btrfs_ioctl_defrag_range_args *range,
3587 u64 newer_than, unsigned long max_pages);
3588 void btrfs_get_block_group_info(struct list_head *groups_list,
3589 struct btrfs_ioctl_space_info *space);
3592 int btrfs_auto_defrag_init(void);
3593 void btrfs_auto_defrag_exit(void);
3594 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3595 struct inode *inode);
3596 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3597 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3598 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3599 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3601 int btrfs_replace_extent_cache(struct inode *inode, struct extent_map *replace,
3602 u64 start, u64 end, int skip_pinned,
3604 extern const struct file_operations btrfs_file_operations;
3605 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3606 struct btrfs_root *root, struct inode *inode,
3607 struct btrfs_path *path, u64 start, u64 end,
3608 u64 *drop_end, int drop_cache);
3609 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3610 struct btrfs_root *root, struct inode *inode, u64 start,
3611 u64 end, int drop_cache);
3612 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3613 struct inode *inode, u64 start, u64 end);
3614 int btrfs_release_file(struct inode *inode, struct file *file);
3615 void btrfs_drop_pages(struct page **pages, size_t num_pages);
3616 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3617 struct page **pages, size_t num_pages,
3618 loff_t pos, size_t write_bytes,
3619 struct extent_state **cached);
3622 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3623 struct btrfs_root *root);
3626 int btrfs_init_sysfs(void);
3627 void btrfs_exit_sysfs(void);
3630 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3633 int btrfs_parse_options(struct btrfs_root *root, char *options);
3634 int btrfs_sync_fs(struct super_block *sb, int wait);
3636 #ifdef CONFIG_PRINTK
3638 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
3640 static inline __printf(2, 3)
3641 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...)
3647 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3648 unsigned int line, int errno, const char *fmt, ...);
3651 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3652 struct btrfs_root *root, const char *function,
3653 unsigned int line, int errno);
3655 #define btrfs_set_fs_incompat(__fs_info, opt) \
3656 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3658 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3661 struct btrfs_super_block *disk_super;
3664 disk_super = fs_info->super_copy;
3665 features = btrfs_super_incompat_flags(disk_super);
3666 if (!(features & flag)) {
3668 btrfs_set_super_incompat_flags(disk_super, features);
3673 * Call btrfs_abort_transaction as early as possible when an error condition is
3674 * detected, that way the exact line number is reported.
3677 #define btrfs_abort_transaction(trans, root, errno) \
3679 __btrfs_abort_transaction(trans, root, __func__, \
3683 #define btrfs_std_error(fs_info, errno) \
3686 __btrfs_std_error((fs_info), __func__, \
3687 __LINE__, (errno), NULL); \
3690 #define btrfs_error(fs_info, errno, fmt, args...) \
3692 __btrfs_std_error((fs_info), __func__, __LINE__, \
3693 (errno), fmt, ##args); \
3697 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3698 unsigned int line, int errno, const char *fmt, ...);
3701 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3702 * will panic(). Otherwise we BUG() here.
3704 #define btrfs_panic(fs_info, errno, fmt, args...) \
3706 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3711 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3712 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3713 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3714 struct inode *inode, struct inode *dir);
3715 int btrfs_acl_chmod(struct inode *inode);
3717 #define btrfs_get_acl NULL
3718 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3719 struct inode *inode, struct inode *dir)
3723 static inline int btrfs_acl_chmod(struct inode *inode)
3730 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3731 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3732 struct btrfs_root *root);
3733 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3734 struct btrfs_root *root);
3735 int btrfs_recover_relocation(struct btrfs_root *root);
3736 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3737 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3738 struct btrfs_root *root, struct extent_buffer *buf,
3739 struct extent_buffer *cow);
3740 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3741 struct btrfs_pending_snapshot *pending,
3742 u64 *bytes_to_reserve);
3743 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3744 struct btrfs_pending_snapshot *pending);
3747 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3748 u64 end, struct btrfs_scrub_progress *progress,
3749 int readonly, int is_dev_replace);
3750 void btrfs_scrub_pause(struct btrfs_root *root);
3751 void btrfs_scrub_pause_super(struct btrfs_root *root);
3752 void btrfs_scrub_continue(struct btrfs_root *root);
3753 void btrfs_scrub_continue_super(struct btrfs_root *root);
3754 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3755 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3756 struct btrfs_device *dev);
3757 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
3758 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3759 struct btrfs_scrub_progress *progress);
3762 struct reada_control {
3763 struct btrfs_root *root; /* tree to prefetch */
3764 struct btrfs_key key_start;
3765 struct btrfs_key key_end; /* exclusive */
3768 wait_queue_head_t wait;
3770 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3771 struct btrfs_key *start, struct btrfs_key *end);
3772 int btrfs_reada_wait(void *handle);
3773 void btrfs_reada_detach(void *handle);
3774 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3775 u64 start, int err);
3778 struct qgroup_update {
3779 struct list_head list;
3780 struct btrfs_delayed_ref_node *node;
3781 struct btrfs_delayed_extent_op *extent_op;
3784 int btrfs_quota_enable(struct btrfs_trans_handle *trans,
3785 struct btrfs_fs_info *fs_info);
3786 int btrfs_quota_disable(struct btrfs_trans_handle *trans,
3787 struct btrfs_fs_info *fs_info);
3788 int btrfs_quota_rescan(struct btrfs_fs_info *fs_info);
3789 int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
3790 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3791 int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
3792 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3793 int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
3794 struct btrfs_fs_info *fs_info, u64 qgroupid,
3796 int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
3797 struct btrfs_fs_info *fs_info, u64 qgroupid);
3798 int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
3799 struct btrfs_fs_info *fs_info, u64 qgroupid,
3800 struct btrfs_qgroup_limit *limit);
3801 int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
3802 void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
3803 struct btrfs_delayed_extent_op;
3804 int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
3805 struct btrfs_delayed_ref_node *node,
3806 struct btrfs_delayed_extent_op *extent_op);
3807 int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
3808 struct btrfs_fs_info *fs_info,
3809 struct btrfs_delayed_ref_node *node,
3810 struct btrfs_delayed_extent_op *extent_op);
3811 int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
3812 struct btrfs_fs_info *fs_info);
3813 int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
3814 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
3815 struct btrfs_qgroup_inherit *inherit);
3816 int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
3817 void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
3819 void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
3821 static inline int is_fstree(u64 rootid)
3823 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3824 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
3829 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3831 return signal_pending(current);