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/semaphore.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.h>
29 #include <linux/wait.h>
30 #include <linux/slab.h>
31 #include <linux/kobject.h>
32 #include <trace/events/btrfs.h>
33 #include <asm/kmap_types.h>
34 #include <linux/pagemap.h>
35 #include <linux/btrfs.h>
36 #include <linux/workqueue.h>
37 #include "extent_io.h"
38 #include "extent_map.h"
39 #include "async-thread.h"
41 struct btrfs_trans_handle;
42 struct btrfs_transaction;
43 struct btrfs_pending_snapshot;
44 extern struct kmem_cache *btrfs_trans_handle_cachep;
45 extern struct kmem_cache *btrfs_transaction_cachep;
46 extern struct kmem_cache *btrfs_bit_radix_cachep;
47 extern struct kmem_cache *btrfs_path_cachep;
48 extern struct kmem_cache *btrfs_free_space_cachep;
49 struct btrfs_ordered_sum;
51 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
52 #define STATIC noinline
54 #define STATIC static noinline
57 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
59 #define BTRFS_MAX_MIRRORS 3
61 #define BTRFS_MAX_LEVEL 8
63 #define BTRFS_COMPAT_EXTENT_TREE_V0
66 * files bigger than this get some pre-flushing when they are added
67 * to the ordered operations list. That way we limit the total
68 * work done by the commit
70 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
72 /* holds pointers to all of the tree roots */
73 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
75 /* stores information about which extents are in use, and reference counts */
76 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
79 * chunk tree stores translations from logical -> physical block numbering
80 * the super block points to the chunk tree
82 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
85 * stores information about which areas of a given device are in use.
86 * one per device. The tree of tree roots points to the device tree
88 #define BTRFS_DEV_TREE_OBJECTID 4ULL
90 /* one per subvolume, storing files and directories */
91 #define BTRFS_FS_TREE_OBJECTID 5ULL
93 /* directory objectid inside the root tree */
94 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
96 /* holds checksums of all the data extents */
97 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
99 /* holds quota configuration and tracking */
100 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
102 /* for storing items that use the BTRFS_UUID_KEY* types */
103 #define BTRFS_UUID_TREE_OBJECTID 9ULL
105 /* for storing balance parameters in the root tree */
106 #define BTRFS_BALANCE_OBJECTID -4ULL
108 /* orhpan objectid for tracking unlinked/truncated files */
109 #define BTRFS_ORPHAN_OBJECTID -5ULL
111 /* does write ahead logging to speed up fsyncs */
112 #define BTRFS_TREE_LOG_OBJECTID -6ULL
113 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
115 /* for space balancing */
116 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
117 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
120 * extent checksums all have this objectid
121 * this allows them to share the logging tree
124 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
126 /* For storing free space cache */
127 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
130 * The inode number assigned to the special inode for storing
133 #define BTRFS_FREE_INO_OBJECTID -12ULL
135 /* dummy objectid represents multiple objectids */
136 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
139 * All files have objectids in this range.
141 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
142 #define BTRFS_LAST_FREE_OBJECTID -256ULL
143 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
147 * the device items go into the chunk tree. The key is in the form
148 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
150 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
152 #define BTRFS_BTREE_INODE_OBJECTID 1
154 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
156 #define BTRFS_DEV_REPLACE_DEVID 0ULL
159 * the max metadata block size. This limit is somewhat artificial,
160 * but the memmove costs go through the roof for larger blocks.
162 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
165 * we can actually store much bigger names, but lets not confuse the rest
168 #define BTRFS_NAME_LEN 255
171 * Theoretical limit is larger, but we keep this down to a sane
172 * value. That should limit greatly the possibility of collisions on
175 #define BTRFS_LINK_MAX 65535U
177 /* 32 bytes in various csum fields */
178 #define BTRFS_CSUM_SIZE 32
181 #define BTRFS_CSUM_TYPE_CRC32 0
183 static int btrfs_csum_sizes[] = { 4, 0 };
185 /* four bytes for CRC32 */
186 #define BTRFS_EMPTY_DIR_SIZE 0
188 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
189 #define REQ_GET_READ_MIRRORS (1 << 30)
191 #define BTRFS_FT_UNKNOWN 0
192 #define BTRFS_FT_REG_FILE 1
193 #define BTRFS_FT_DIR 2
194 #define BTRFS_FT_CHRDEV 3
195 #define BTRFS_FT_BLKDEV 4
196 #define BTRFS_FT_FIFO 5
197 #define BTRFS_FT_SOCK 6
198 #define BTRFS_FT_SYMLINK 7
199 #define BTRFS_FT_XATTR 8
200 #define BTRFS_FT_MAX 9
202 /* ioprio of readahead is set to idle */
203 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
205 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
208 * The key defines the order in the tree, and so it also defines (optimal)
211 * objectid corresponds to the inode number.
213 * type tells us things about the object, and is a kind of stream selector.
214 * so for a given inode, keys with type of 1 might refer to the inode data,
215 * type of 2 may point to file data in the btree and type == 3 may point to
218 * offset is the starting byte offset for this key in the stream.
220 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
221 * in cpu native order. Otherwise they are identical and their sizes
222 * should be the same (ie both packed)
224 struct btrfs_disk_key {
228 } __attribute__ ((__packed__));
234 } __attribute__ ((__packed__));
236 struct btrfs_mapping_tree {
237 struct extent_map_tree map_tree;
240 struct btrfs_dev_item {
241 /* the internal btrfs device id */
244 /* size of the device */
250 /* optimal io alignment for this device */
253 /* optimal io width for this device */
256 /* minimal io size for this device */
259 /* type and info about this device */
262 /* expected generation for this device */
266 * starting byte of this partition on the device,
267 * to allow for stripe alignment in the future
271 /* grouping information for allocation decisions */
274 /* seek speed 0-100 where 100 is fastest */
277 /* bandwidth 0-100 where 100 is fastest */
280 /* btrfs generated uuid for this device */
281 u8 uuid[BTRFS_UUID_SIZE];
283 /* uuid of FS who owns this device */
284 u8 fsid[BTRFS_UUID_SIZE];
285 } __attribute__ ((__packed__));
287 struct btrfs_stripe {
290 u8 dev_uuid[BTRFS_UUID_SIZE];
291 } __attribute__ ((__packed__));
294 /* size of this chunk in bytes */
297 /* objectid of the root referencing this chunk */
303 /* optimal io alignment for this chunk */
306 /* optimal io width for this chunk */
309 /* minimal io size for this chunk */
312 /* 2^16 stripes is quite a lot, a second limit is the size of a single
317 /* sub stripes only matter for raid10 */
319 struct btrfs_stripe stripe;
320 /* additional stripes go here */
321 } __attribute__ ((__packed__));
323 #define BTRFS_FREE_SPACE_EXTENT 1
324 #define BTRFS_FREE_SPACE_BITMAP 2
326 struct btrfs_free_space_entry {
330 } __attribute__ ((__packed__));
332 struct btrfs_free_space_header {
333 struct btrfs_disk_key location;
337 } __attribute__ ((__packed__));
339 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
341 BUG_ON(num_stripes == 0);
342 return sizeof(struct btrfs_chunk) +
343 sizeof(struct btrfs_stripe) * (num_stripes - 1);
346 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
347 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
352 #define BTRFS_FS_STATE_ERROR 0
353 #define BTRFS_FS_STATE_REMOUNTING 1
354 #define BTRFS_FS_STATE_TRANS_ABORTED 2
355 #define BTRFS_FS_STATE_DEV_REPLACING 3
357 /* Super block flags */
358 /* Errors detected */
359 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
361 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
362 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
364 #define BTRFS_BACKREF_REV_MAX 256
365 #define BTRFS_BACKREF_REV_SHIFT 56
366 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
367 BTRFS_BACKREF_REV_SHIFT)
369 #define BTRFS_OLD_BACKREF_REV 0
370 #define BTRFS_MIXED_BACKREF_REV 1
373 * every tree block (leaf or node) starts with this header.
375 struct btrfs_header {
376 /* these first four must match the super block */
377 u8 csum[BTRFS_CSUM_SIZE];
378 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
379 __le64 bytenr; /* which block this node is supposed to live in */
382 /* allowed to be different from the super from here on down */
383 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
388 } __attribute__ ((__packed__));
390 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
391 sizeof(struct btrfs_header)) / \
392 sizeof(struct btrfs_key_ptr))
393 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
394 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
395 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
396 sizeof(struct btrfs_item) - \
397 sizeof(struct btrfs_file_extent_item))
398 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
399 sizeof(struct btrfs_item) -\
400 sizeof(struct btrfs_dir_item))
404 * this is a very generous portion of the super block, giving us
405 * room to translate 14 chunks with 3 stripes each.
407 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
408 #define BTRFS_LABEL_SIZE 256
411 * just in case we somehow lose the roots and are not able to mount,
412 * we store an array of the roots from previous transactions
415 #define BTRFS_NUM_BACKUP_ROOTS 4
416 struct btrfs_root_backup {
418 __le64 tree_root_gen;
421 __le64 chunk_root_gen;
424 __le64 extent_root_gen;
433 __le64 csum_root_gen;
443 u8 extent_root_level;
447 /* future and to align */
449 } __attribute__ ((__packed__));
452 * the super block basically lists the main trees of the FS
453 * it currently lacks any block count etc etc
455 struct btrfs_super_block {
456 u8 csum[BTRFS_CSUM_SIZE];
457 /* the first 4 fields must match struct btrfs_header */
458 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
459 __le64 bytenr; /* this block number */
462 /* allowed to be different from the btrfs_header from here own down */
469 /* this will help find the new super based on the log root */
470 __le64 log_root_transid;
473 __le64 root_dir_objectid;
479 __le32 sys_chunk_array_size;
480 __le64 chunk_root_generation;
482 __le64 compat_ro_flags;
483 __le64 incompat_flags;
488 struct btrfs_dev_item dev_item;
490 char label[BTRFS_LABEL_SIZE];
492 __le64 cache_generation;
493 __le64 uuid_tree_generation;
495 /* future expansion */
497 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
498 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
499 } __attribute__ ((__packed__));
502 * Compat flags that we support. If any incompat flags are set other than the
503 * ones specified below then we will fail to mount
505 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
506 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
507 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
508 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
510 * some patches floated around with a second compression method
511 * lets save that incompat here for when they do get in
512 * Note we don't actually support it, we're just reserving the
515 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
518 * older kernels tried to do bigger metadata blocks, but the
519 * code was pretty buggy. Lets not let them try anymore.
521 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
523 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
524 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
525 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
526 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
528 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
529 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
530 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
531 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
532 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
533 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
535 #define BTRFS_FEATURE_INCOMPAT_SUPP \
536 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
537 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
538 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
539 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
540 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
541 BTRFS_FEATURE_INCOMPAT_RAID56 | \
542 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
543 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
544 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
546 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
547 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
548 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
551 * A leaf is full of items. offset and size tell us where to find
552 * the item in the leaf (relative to the start of the data area)
555 struct btrfs_disk_key key;
558 } __attribute__ ((__packed__));
561 * leaves have an item area and a data area:
562 * [item0, item1....itemN] [free space] [dataN...data1, data0]
564 * The data is separate from the items to get the keys closer together
568 struct btrfs_header header;
569 struct btrfs_item items[];
570 } __attribute__ ((__packed__));
573 * all non-leaf blocks are nodes, they hold only keys and pointers to
576 struct btrfs_key_ptr {
577 struct btrfs_disk_key key;
580 } __attribute__ ((__packed__));
583 struct btrfs_header header;
584 struct btrfs_key_ptr ptrs[];
585 } __attribute__ ((__packed__));
588 * btrfs_paths remember the path taken from the root down to the leaf.
589 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
590 * to any other levels that are present.
592 * The slots array records the index of the item or block pointer
593 * used while walking the tree.
596 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
597 int slots[BTRFS_MAX_LEVEL];
598 /* if there is real range locking, this locks field will change */
599 int locks[BTRFS_MAX_LEVEL];
601 /* keep some upper locks as we walk down */
605 * set by btrfs_split_item, tells search_slot to keep all locks
606 * and to force calls to keep space in the nodes
608 unsigned int search_for_split:1;
609 unsigned int keep_locks:1;
610 unsigned int skip_locking:1;
611 unsigned int leave_spinning:1;
612 unsigned int search_commit_root:1;
613 unsigned int need_commit_sem:1;
617 * items in the extent btree are used to record the objectid of the
618 * owner of the block and the number of references
621 struct btrfs_extent_item {
625 } __attribute__ ((__packed__));
627 struct btrfs_extent_item_v0 {
629 } __attribute__ ((__packed__));
631 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
632 sizeof(struct btrfs_item))
634 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
635 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
637 /* following flags only apply to tree blocks */
639 /* use full backrefs for extent pointers in the block */
640 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
643 * this flag is only used internally by scrub and may be changed at any time
644 * it is only declared here to avoid collisions
646 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
648 struct btrfs_tree_block_info {
649 struct btrfs_disk_key key;
651 } __attribute__ ((__packed__));
653 struct btrfs_extent_data_ref {
658 } __attribute__ ((__packed__));
660 struct btrfs_shared_data_ref {
662 } __attribute__ ((__packed__));
664 struct btrfs_extent_inline_ref {
667 } __attribute__ ((__packed__));
669 /* old style backrefs item */
670 struct btrfs_extent_ref_v0 {
675 } __attribute__ ((__packed__));
678 /* dev extents record free space on individual devices. The owner
679 * field points back to the chunk allocation mapping tree that allocated
680 * the extent. The chunk tree uuid field is a way to double check the owner
682 struct btrfs_dev_extent {
684 __le64 chunk_objectid;
687 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
688 } __attribute__ ((__packed__));
690 struct btrfs_inode_ref {
694 } __attribute__ ((__packed__));
696 struct btrfs_inode_extref {
697 __le64 parent_objectid;
702 } __attribute__ ((__packed__));
704 struct btrfs_timespec {
707 } __attribute__ ((__packed__));
709 enum btrfs_compression_type {
710 BTRFS_COMPRESS_NONE = 0,
711 BTRFS_COMPRESS_ZLIB = 1,
712 BTRFS_COMPRESS_LZO = 2,
713 BTRFS_COMPRESS_TYPES = 2,
714 BTRFS_COMPRESS_LAST = 3,
717 struct btrfs_inode_item {
718 /* nfs style generation number */
720 /* transid that last touched this inode */
732 /* modification sequence number for NFS */
736 * a little future expansion, for more than this we can
737 * just grow the inode item and version it
740 struct btrfs_timespec atime;
741 struct btrfs_timespec ctime;
742 struct btrfs_timespec mtime;
743 struct btrfs_timespec otime;
744 } __attribute__ ((__packed__));
746 struct btrfs_dir_log_item {
748 } __attribute__ ((__packed__));
750 struct btrfs_dir_item {
751 struct btrfs_disk_key location;
756 } __attribute__ ((__packed__));
758 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
761 * Internal in-memory flag that a subvolume has been marked for deletion but
762 * still visible as a directory
764 #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
766 struct btrfs_root_item {
767 struct btrfs_inode_item inode;
773 __le64 last_snapshot;
776 struct btrfs_disk_key drop_progress;
781 * The following fields appear after subvol_uuids+subvol_times
786 * This generation number is used to test if the new fields are valid
787 * and up to date while reading the root item. Everytime the root item
788 * is written out, the "generation" field is copied into this field. If
789 * anyone ever mounted the fs with an older kernel, we will have
790 * mismatching generation values here and thus must invalidate the
791 * new fields. See btrfs_update_root and btrfs_find_last_root for
793 * the offset of generation_v2 is also used as the start for the memset
794 * when invalidating the fields.
796 __le64 generation_v2;
797 u8 uuid[BTRFS_UUID_SIZE];
798 u8 parent_uuid[BTRFS_UUID_SIZE];
799 u8 received_uuid[BTRFS_UUID_SIZE];
800 __le64 ctransid; /* updated when an inode changes */
801 __le64 otransid; /* trans when created */
802 __le64 stransid; /* trans when sent. non-zero for received subvol */
803 __le64 rtransid; /* trans when received. non-zero for received subvol */
804 struct btrfs_timespec ctime;
805 struct btrfs_timespec otime;
806 struct btrfs_timespec stime;
807 struct btrfs_timespec rtime;
808 __le64 reserved[8]; /* for future */
809 } __attribute__ ((__packed__));
812 * this is used for both forward and backward root refs
814 struct btrfs_root_ref {
818 } __attribute__ ((__packed__));
820 struct btrfs_disk_balance_args {
822 * profiles to operate on, single is denoted by
823 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
833 /* devid subset filter [pstart..pend) */
837 /* btrfs virtual address space subset filter [vstart..vend) */
842 * profile to convert to, single is denoted by
843 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
847 /* BTRFS_BALANCE_ARGS_* */
850 /* BTRFS_BALANCE_ARGS_LIMIT value */
854 } __attribute__ ((__packed__));
857 * store balance parameters to disk so that balance can be properly
858 * resumed after crash or unmount
860 struct btrfs_balance_item {
861 /* BTRFS_BALANCE_* */
864 struct btrfs_disk_balance_args data;
865 struct btrfs_disk_balance_args meta;
866 struct btrfs_disk_balance_args sys;
869 } __attribute__ ((__packed__));
871 #define BTRFS_FILE_EXTENT_INLINE 0
872 #define BTRFS_FILE_EXTENT_REG 1
873 #define BTRFS_FILE_EXTENT_PREALLOC 2
875 struct btrfs_file_extent_item {
877 * transaction id that created this extent
881 * max number of bytes to hold this extent in ram
882 * when we split a compressed extent we can't know how big
883 * each of the resulting pieces will be. So, this is
884 * an upper limit on the size of the extent in ram instead of
890 * 32 bits for the various ways we might encode the data,
891 * including compression and encryption. If any of these
892 * are set to something a given disk format doesn't understand
893 * it is treated like an incompat flag for reading and writing,
898 __le16 other_encoding; /* spare for later use */
900 /* are we inline data or a real extent? */
904 * disk space consumed by the extent, checksum blocks are included
908 __le64 disk_num_bytes;
910 * the logical offset in file blocks (no csums)
911 * this extent record is for. This allows a file extent to point
912 * into the middle of an existing extent on disk, sharing it
913 * between two snapshots (useful if some bytes in the middle of the
914 * extent have changed
918 * the logical number of file blocks (no csums included). This
919 * always reflects the size uncompressed and without encoding.
923 } __attribute__ ((__packed__));
925 struct btrfs_csum_item {
927 } __attribute__ ((__packed__));
929 struct btrfs_dev_stats_item {
931 * grow this item struct at the end for future enhancements and keep
932 * the existing values unchanged
934 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
935 } __attribute__ ((__packed__));
937 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
938 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
939 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
940 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
941 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
942 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
943 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
945 struct btrfs_dev_replace {
946 u64 replace_state; /* see #define above */
947 u64 time_started; /* seconds since 1-Jan-1970 */
948 u64 time_stopped; /* seconds since 1-Jan-1970 */
949 atomic64_t num_write_errors;
950 atomic64_t num_uncorrectable_read_errors;
953 u64 committed_cursor_left;
954 u64 cursor_left_last_write_of_item;
957 u64 cont_reading_from_srcdev_mode; /* see #define above */
960 int item_needs_writeback;
961 struct btrfs_device *srcdev;
962 struct btrfs_device *tgtdev;
965 atomic_t nesting_level;
966 struct mutex lock_finishing_cancel_unmount;
967 struct mutex lock_management_lock;
970 struct btrfs_scrub_progress scrub_progress;
973 struct btrfs_dev_replace_item {
975 * grow this item struct at the end for future enhancements and keep
976 * the existing values unchanged
981 __le64 cont_reading_from_srcdev_mode;
983 __le64 replace_state;
986 __le64 num_write_errors;
987 __le64 num_uncorrectable_read_errors;
988 } __attribute__ ((__packed__));
990 /* different types of block groups (and chunks) */
991 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
992 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
993 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
994 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
995 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
996 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
997 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
998 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
999 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
1000 #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1001 BTRFS_SPACE_INFO_GLOBAL_RSV)
1003 enum btrfs_raid_types {
1014 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1015 BTRFS_BLOCK_GROUP_SYSTEM | \
1016 BTRFS_BLOCK_GROUP_METADATA)
1018 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1019 BTRFS_BLOCK_GROUP_RAID1 | \
1020 BTRFS_BLOCK_GROUP_RAID5 | \
1021 BTRFS_BLOCK_GROUP_RAID6 | \
1022 BTRFS_BLOCK_GROUP_DUP | \
1023 BTRFS_BLOCK_GROUP_RAID10)
1025 * We need a bit for restriper to be able to tell when chunks of type
1026 * SINGLE are available. This "extended" profile format is used in
1027 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1028 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1029 * to avoid remappings between two formats in future.
1031 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1034 * A fake block group type that is used to communicate global block reserve
1035 * size to userspace via the SPACE_INFO ioctl.
1037 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1039 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1040 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1042 static inline u64 chunk_to_extended(u64 flags)
1044 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1045 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1049 static inline u64 extended_to_chunk(u64 flags)
1051 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1054 struct btrfs_block_group_item {
1056 __le64 chunk_objectid;
1058 } __attribute__ ((__packed__));
1061 * is subvolume quota turned on?
1063 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1065 * RESCAN is set during the initialization phase
1067 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1069 * Some qgroup entries are known to be out of date,
1070 * either because the configuration has changed in a way that
1071 * makes a rescan necessary, or because the fs has been mounted
1072 * with a non-qgroup-aware version.
1073 * Turning qouta off and on again makes it inconsistent, too.
1075 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1077 #define BTRFS_QGROUP_STATUS_VERSION 1
1079 struct btrfs_qgroup_status_item {
1082 * the generation is updated during every commit. As older
1083 * versions of btrfs are not aware of qgroups, it will be
1084 * possible to detect inconsistencies by checking the
1085 * generation on mount time
1089 /* flag definitions see above */
1093 * only used during scanning to record the progress
1094 * of the scan. It contains a logical address
1097 } __attribute__ ((__packed__));
1099 struct btrfs_qgroup_info_item {
1105 } __attribute__ ((__packed__));
1107 /* flags definition for qgroup limits */
1108 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1109 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1110 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1111 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1112 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1113 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1115 struct btrfs_qgroup_limit_item {
1117 * only updated when any of the other values change
1124 } __attribute__ ((__packed__));
1126 struct btrfs_space_info {
1129 u64 total_bytes; /* total bytes in the space,
1130 this doesn't take mirrors into account */
1131 u64 bytes_used; /* total bytes used,
1132 this doesn't take mirrors into account */
1133 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1134 transaction finishes */
1135 u64 bytes_reserved; /* total bytes the allocator has reserved for
1136 current allocations */
1137 u64 bytes_may_use; /* number of bytes that may be used for
1138 delalloc/allocations */
1139 u64 bytes_readonly; /* total bytes that are read only */
1141 unsigned int full:1; /* indicates that we cannot allocate any more
1142 chunks for this space */
1143 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1145 unsigned int flush:1; /* set if we are trying to make space */
1147 unsigned int force_alloc; /* set if we need to force a chunk
1148 alloc for this space */
1150 u64 disk_used; /* total bytes used on disk */
1151 u64 disk_total; /* total bytes on disk, takes mirrors into
1157 * bytes_pinned is kept in line with what is actually pinned, as in
1158 * we've called update_block_group and dropped the bytes_used counter
1159 * and increased the bytes_pinned counter. However this means that
1160 * bytes_pinned does not reflect the bytes that will be pinned once the
1161 * delayed refs are flushed, so this counter is inc'ed everytime we call
1162 * btrfs_free_extent so it is a realtime count of what will be freed
1163 * once the transaction is committed. It will be zero'ed everytime the
1164 * transaction commits.
1166 struct percpu_counter total_bytes_pinned;
1168 struct list_head list;
1170 struct rw_semaphore groups_sem;
1171 /* for block groups in our same type */
1172 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1173 wait_queue_head_t wait;
1175 struct kobject kobj;
1176 struct kobject block_group_kobjs[BTRFS_NR_RAID_TYPES];
1179 #define BTRFS_BLOCK_RSV_GLOBAL 1
1180 #define BTRFS_BLOCK_RSV_DELALLOC 2
1181 #define BTRFS_BLOCK_RSV_TRANS 3
1182 #define BTRFS_BLOCK_RSV_CHUNK 4
1183 #define BTRFS_BLOCK_RSV_DELOPS 5
1184 #define BTRFS_BLOCK_RSV_EMPTY 6
1185 #define BTRFS_BLOCK_RSV_TEMP 7
1187 struct btrfs_block_rsv {
1190 struct btrfs_space_info *space_info;
1192 unsigned short full;
1193 unsigned short type;
1194 unsigned short failfast;
1198 * free clusters are used to claim free space in relatively large chunks,
1199 * allowing us to do less seeky writes. They are used for all metadata
1200 * allocations and data allocations in ssd mode.
1202 struct btrfs_free_cluster {
1204 spinlock_t refill_lock;
1205 struct rb_root root;
1207 /* largest extent in this cluster */
1210 /* first extent starting offset */
1213 struct btrfs_block_group_cache *block_group;
1215 * when a cluster is allocated from a block group, we put the
1216 * cluster onto a list in the block group so that it can
1217 * be freed before the block group is freed.
1219 struct list_head block_group_list;
1222 enum btrfs_caching_type {
1224 BTRFS_CACHE_STARTED = 1,
1225 BTRFS_CACHE_FAST = 2,
1226 BTRFS_CACHE_FINISHED = 3,
1227 BTRFS_CACHE_ERROR = 4,
1230 enum btrfs_disk_cache_state {
1231 BTRFS_DC_WRITTEN = 0,
1235 BTRFS_DC_NEED_WRITE = 4,
1238 struct btrfs_caching_control {
1239 struct list_head list;
1241 wait_queue_head_t wait;
1242 struct btrfs_work work;
1243 struct btrfs_block_group_cache *block_group;
1248 struct btrfs_block_group_cache {
1249 struct btrfs_key key;
1250 struct btrfs_block_group_item item;
1251 struct btrfs_fs_info *fs_info;
1252 struct inode *inode;
1259 u64 cache_generation;
1261 /* for raid56, this is a full stripe, without parity */
1262 unsigned long full_stripe_len;
1265 unsigned int dirty:1;
1266 unsigned int iref:1;
1268 int disk_cache_state;
1270 /* cache tracking stuff */
1272 struct btrfs_caching_control *caching_ctl;
1273 u64 last_byte_to_unpin;
1275 struct btrfs_space_info *space_info;
1277 /* free space cache stuff */
1278 struct btrfs_free_space_ctl *free_space_ctl;
1280 /* block group cache stuff */
1281 struct rb_node cache_node;
1283 /* for block groups in the same raid type */
1284 struct list_head list;
1289 /* List of struct btrfs_free_clusters for this block group.
1290 * Today it will only have one thing on it, but that may change
1292 struct list_head cluster_list;
1294 /* For delayed block group creation */
1295 struct list_head new_bg_list;
1298 /* delayed seq elem */
1300 struct list_head list;
1304 enum btrfs_orphan_cleanup_state {
1305 ORPHAN_CLEANUP_STARTED = 1,
1306 ORPHAN_CLEANUP_DONE = 2,
1309 /* used by the raid56 code to lock stripes for read/modify/write */
1310 struct btrfs_stripe_hash {
1311 struct list_head hash_list;
1312 wait_queue_head_t wait;
1316 /* used by the raid56 code to lock stripes for read/modify/write */
1317 struct btrfs_stripe_hash_table {
1318 struct list_head stripe_cache;
1319 spinlock_t cache_lock;
1321 struct btrfs_stripe_hash table[];
1324 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1326 void btrfs_init_async_reclaim_work(struct work_struct *work);
1329 struct reloc_control;
1330 struct btrfs_device;
1331 struct btrfs_fs_devices;
1332 struct btrfs_balance_control;
1333 struct btrfs_delayed_root;
1334 struct btrfs_fs_info {
1335 u8 fsid[BTRFS_FSID_SIZE];
1336 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1337 struct btrfs_root *extent_root;
1338 struct btrfs_root *tree_root;
1339 struct btrfs_root *chunk_root;
1340 struct btrfs_root *dev_root;
1341 struct btrfs_root *fs_root;
1342 struct btrfs_root *csum_root;
1343 struct btrfs_root *quota_root;
1344 struct btrfs_root *uuid_root;
1346 /* the log root tree is a directory of all the other log roots */
1347 struct btrfs_root *log_root_tree;
1349 spinlock_t fs_roots_radix_lock;
1350 struct radix_tree_root fs_roots_radix;
1352 /* block group cache stuff */
1353 spinlock_t block_group_cache_lock;
1354 u64 first_logical_byte;
1355 struct rb_root block_group_cache_tree;
1357 /* keep track of unallocated space */
1358 spinlock_t free_chunk_lock;
1359 u64 free_chunk_space;
1361 struct extent_io_tree freed_extents[2];
1362 struct extent_io_tree *pinned_extents;
1364 /* logical->physical extent mapping */
1365 struct btrfs_mapping_tree mapping_tree;
1368 * block reservation for extent, checksum, root tree and
1369 * delayed dir index item
1371 struct btrfs_block_rsv global_block_rsv;
1372 /* block reservation for delay allocation */
1373 struct btrfs_block_rsv delalloc_block_rsv;
1374 /* block reservation for metadata operations */
1375 struct btrfs_block_rsv trans_block_rsv;
1376 /* block reservation for chunk tree */
1377 struct btrfs_block_rsv chunk_block_rsv;
1378 /* block reservation for delayed operations */
1379 struct btrfs_block_rsv delayed_block_rsv;
1381 struct btrfs_block_rsv empty_block_rsv;
1384 u64 last_trans_committed;
1385 u64 avg_delayed_ref_runtime;
1388 * this is updated to the current trans every time a full commit
1389 * is required instead of the faster short fsync log commits
1391 u64 last_trans_log_full_commit;
1392 unsigned long mount_opt;
1393 unsigned long compress_type:4;
1394 int commit_interval;
1396 * It is a suggestive number, the read side is safe even it gets a
1397 * wrong number because we will write out the data into a regular
1398 * extent. The write side(mount/remount) is under ->s_umount lock,
1399 * so it is also safe.
1403 * Protected by ->chunk_mutex and sb->s_umount.
1405 * The reason that we use two lock to protect it is because only
1406 * remount and mount operations can change it and these two operations
1407 * are under sb->s_umount, but the read side (chunk allocation) can not
1408 * acquire sb->s_umount or the deadlock would happen. So we use two
1409 * locks to protect it. On the write side, we must acquire two locks,
1410 * and on the read side, we just need acquire one of them.
1413 struct btrfs_transaction *running_transaction;
1414 wait_queue_head_t transaction_throttle;
1415 wait_queue_head_t transaction_wait;
1416 wait_queue_head_t transaction_blocked_wait;
1417 wait_queue_head_t async_submit_wait;
1420 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1421 * when they are updated.
1423 * Because we do not clear the flags for ever, so we needn't use
1424 * the lock on the read side.
1426 * We also needn't use the lock when we mount the fs, because
1427 * there is no other task which will update the flag.
1429 spinlock_t super_lock;
1430 struct btrfs_super_block *super_copy;
1431 struct btrfs_super_block *super_for_commit;
1432 struct block_device *__bdev;
1433 struct super_block *sb;
1434 struct inode *btree_inode;
1435 struct backing_dev_info bdi;
1436 struct mutex tree_log_mutex;
1437 struct mutex transaction_kthread_mutex;
1438 struct mutex cleaner_mutex;
1439 struct mutex chunk_mutex;
1440 struct mutex volume_mutex;
1442 /* this is used during read/modify/write to make sure
1443 * no two ios are trying to mod the same stripe at the same
1446 struct btrfs_stripe_hash_table *stripe_hash_table;
1449 * this protects the ordered operations list only while we are
1450 * processing all of the entries on it. This way we make
1451 * sure the commit code doesn't find the list temporarily empty
1452 * because another function happens to be doing non-waiting preflush
1453 * before jumping into the main commit.
1455 struct mutex ordered_operations_mutex;
1458 * Same as ordered_operations_mutex except this is for ordered extents
1459 * and not the operations.
1461 struct mutex ordered_extent_flush_mutex;
1463 struct rw_semaphore commit_root_sem;
1465 struct rw_semaphore cleanup_work_sem;
1467 struct rw_semaphore subvol_sem;
1468 struct srcu_struct subvol_srcu;
1470 spinlock_t trans_lock;
1472 * the reloc mutex goes with the trans lock, it is taken
1473 * during commit to protect us from the relocation code
1475 struct mutex reloc_mutex;
1477 struct list_head trans_list;
1478 struct list_head dead_roots;
1479 struct list_head caching_block_groups;
1481 spinlock_t delayed_iput_lock;
1482 struct list_head delayed_iputs;
1484 /* this protects tree_mod_seq_list */
1485 spinlock_t tree_mod_seq_lock;
1486 atomic64_t tree_mod_seq;
1487 struct list_head tree_mod_seq_list;
1489 /* this protects tree_mod_log */
1490 rwlock_t tree_mod_log_lock;
1491 struct rb_root tree_mod_log;
1493 atomic_t nr_async_submits;
1494 atomic_t async_submit_draining;
1495 atomic_t nr_async_bios;
1496 atomic_t async_delalloc_pages;
1497 atomic_t open_ioctl_trans;
1500 * this is used to protect the following list -- ordered_roots.
1502 spinlock_t ordered_root_lock;
1505 * all fs/file tree roots in which there are data=ordered extents
1506 * pending writeback are added into this list.
1508 * these can span multiple transactions and basically include
1509 * every dirty data page that isn't from nodatacow
1511 struct list_head ordered_roots;
1513 struct mutex delalloc_root_mutex;
1514 spinlock_t delalloc_root_lock;
1515 /* all fs/file tree roots that have delalloc inodes. */
1516 struct list_head delalloc_roots;
1519 * there is a pool of worker threads for checksumming during writes
1520 * and a pool for checksumming after reads. This is because readers
1521 * can run with FS locks held, and the writers may be waiting for
1522 * those locks. We don't want ordering in the pending list to cause
1523 * deadlocks, and so the two are serviced separately.
1525 * A third pool does submit_bio to avoid deadlocking with the other
1528 struct btrfs_workqueue *workers;
1529 struct btrfs_workqueue *delalloc_workers;
1530 struct btrfs_workqueue *flush_workers;
1531 struct btrfs_workqueue *endio_workers;
1532 struct btrfs_workqueue *endio_meta_workers;
1533 struct btrfs_workqueue *endio_raid56_workers;
1534 struct btrfs_workqueue *rmw_workers;
1535 struct btrfs_workqueue *endio_meta_write_workers;
1536 struct btrfs_workqueue *endio_write_workers;
1537 struct btrfs_workqueue *endio_freespace_worker;
1538 struct btrfs_workqueue *submit_workers;
1539 struct btrfs_workqueue *caching_workers;
1540 struct btrfs_workqueue *readahead_workers;
1543 * fixup workers take dirty pages that didn't properly go through
1544 * the cow mechanism and make them safe to write. It happens
1545 * for the sys_munmap function call path
1547 struct btrfs_workqueue *fixup_workers;
1548 struct btrfs_workqueue *delayed_workers;
1549 struct task_struct *transaction_kthread;
1550 struct task_struct *cleaner_kthread;
1551 int thread_pool_size;
1553 struct kobject super_kobj;
1554 struct kobject *space_info_kobj;
1555 struct kobject *device_dir_kobj;
1556 struct completion kobj_unregister;
1559 int log_root_recovering;
1563 /* used to keep from writing metadata until there is a nice batch */
1564 struct percpu_counter dirty_metadata_bytes;
1565 struct percpu_counter delalloc_bytes;
1566 s32 dirty_metadata_batch;
1569 struct list_head dirty_cowonly_roots;
1571 struct btrfs_fs_devices *fs_devices;
1574 * the space_info list is almost entirely read only. It only changes
1575 * when we add a new raid type to the FS, and that happens
1576 * very rarely. RCU is used to protect it.
1578 struct list_head space_info;
1580 struct btrfs_space_info *data_sinfo;
1582 struct reloc_control *reloc_ctl;
1584 /* data_alloc_cluster is only used in ssd mode */
1585 struct btrfs_free_cluster data_alloc_cluster;
1587 /* all metadata allocations go through this cluster */
1588 struct btrfs_free_cluster meta_alloc_cluster;
1590 /* auto defrag inodes go here */
1591 spinlock_t defrag_inodes_lock;
1592 struct rb_root defrag_inodes;
1593 atomic_t defrag_running;
1595 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1596 seqlock_t profiles_lock;
1598 * these three are in extended format (availability of single
1599 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1600 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1602 u64 avail_data_alloc_bits;
1603 u64 avail_metadata_alloc_bits;
1604 u64 avail_system_alloc_bits;
1606 /* restriper state */
1607 spinlock_t balance_lock;
1608 struct mutex balance_mutex;
1609 atomic_t balance_running;
1610 atomic_t balance_pause_req;
1611 atomic_t balance_cancel_req;
1612 struct btrfs_balance_control *balance_ctl;
1613 wait_queue_head_t balance_wait_q;
1615 unsigned data_chunk_allocations;
1616 unsigned metadata_ratio;
1620 /* private scrub information */
1621 struct mutex scrub_lock;
1622 atomic_t scrubs_running;
1623 atomic_t scrub_pause_req;
1624 atomic_t scrubs_paused;
1625 atomic_t scrub_cancel_req;
1626 wait_queue_head_t scrub_pause_wait;
1627 int scrub_workers_refcnt;
1628 struct btrfs_workqueue *scrub_workers;
1629 struct btrfs_workqueue *scrub_wr_completion_workers;
1630 struct btrfs_workqueue *scrub_nocow_workers;
1632 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1633 u32 check_integrity_print_mask;
1638 unsigned int quota_enabled:1;
1641 * quota_enabled only changes state after a commit. This holds the
1644 unsigned int pending_quota_state:1;
1646 /* is qgroup tracking in a consistent state? */
1649 /* holds configuration and tracking. Protected by qgroup_lock */
1650 struct rb_root qgroup_tree;
1651 spinlock_t qgroup_lock;
1654 * used to avoid frequently calling ulist_alloc()/ulist_free()
1655 * when doing qgroup accounting, it must be protected by qgroup_lock.
1657 struct ulist *qgroup_ulist;
1659 /* protect user change for quota operations */
1660 struct mutex qgroup_ioctl_lock;
1662 /* list of dirty qgroups to be written at next commit */
1663 struct list_head dirty_qgroups;
1665 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1668 /* qgroup rescan items */
1669 struct mutex qgroup_rescan_lock; /* protects the progress item */
1670 struct btrfs_key qgroup_rescan_progress;
1671 struct btrfs_workqueue *qgroup_rescan_workers;
1672 struct completion qgroup_rescan_completion;
1673 struct btrfs_work qgroup_rescan_work;
1675 /* filesystem state */
1676 unsigned long fs_state;
1678 struct btrfs_delayed_root *delayed_root;
1680 /* readahead tree */
1681 spinlock_t reada_lock;
1682 struct radix_tree_root reada_tree;
1684 /* Extent buffer radix tree */
1685 spinlock_t buffer_lock;
1686 struct radix_tree_root buffer_radix;
1688 /* next backup root to be overwritten */
1689 int backup_root_index;
1691 int num_tolerated_disk_barrier_failures;
1693 /* device replace state */
1694 struct btrfs_dev_replace dev_replace;
1696 atomic_t mutually_exclusive_operation_running;
1698 struct percpu_counter bio_counter;
1699 wait_queue_head_t replace_wait;
1701 struct semaphore uuid_tree_rescan_sem;
1702 unsigned int update_uuid_tree_gen:1;
1704 /* Used to reclaim the metadata space in the background. */
1705 struct work_struct async_reclaim_work;
1708 struct btrfs_subvolume_writers {
1709 struct percpu_counter counter;
1710 wait_queue_head_t wait;
1714 * The state of btrfs root
1717 * btrfs_record_root_in_trans is a multi-step process,
1718 * and it can race with the balancing code. But the
1719 * race is very small, and only the first time the root
1720 * is added to each transaction. So IN_TRANS_SETUP
1721 * is used to tell us when more checks are required
1723 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1724 #define BTRFS_ROOT_REF_COWS 1
1725 #define BTRFS_ROOT_TRACK_DIRTY 2
1726 #define BTRFS_ROOT_IN_RADIX 3
1727 #define BTRFS_ROOT_DUMMY_ROOT 4
1728 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1729 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1730 #define BTRFS_ROOT_FORCE_COW 7
1731 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1734 * in ram representation of the tree. extent_root is used for all allocations
1735 * and for the extent tree extent_root root.
1738 struct extent_buffer *node;
1740 struct extent_buffer *commit_root;
1741 struct btrfs_root *log_root;
1742 struct btrfs_root *reloc_root;
1744 unsigned long state;
1745 struct btrfs_root_item root_item;
1746 struct btrfs_key root_key;
1747 struct btrfs_fs_info *fs_info;
1748 struct extent_io_tree dirty_log_pages;
1750 struct kobject root_kobj;
1751 struct completion kobj_unregister;
1752 struct mutex objectid_mutex;
1754 spinlock_t accounting_lock;
1755 struct btrfs_block_rsv *block_rsv;
1757 /* free ino cache stuff */
1758 struct btrfs_free_space_ctl *free_ino_ctl;
1759 enum btrfs_caching_type cached;
1760 spinlock_t cache_lock;
1761 wait_queue_head_t cache_wait;
1762 struct btrfs_free_space_ctl *free_ino_pinned;
1764 struct inode *cache_inode;
1766 struct mutex log_mutex;
1767 wait_queue_head_t log_writer_wait;
1768 wait_queue_head_t log_commit_wait[2];
1769 struct list_head log_ctxs[2];
1770 atomic_t log_writers;
1771 atomic_t log_commit[2];
1774 /* No matter the commit succeeds or not*/
1775 int log_transid_committed;
1776 /* Just be updated when the commit succeeds. */
1777 int last_log_commit;
1778 pid_t log_start_pid;
1783 /* data allocations are done in sectorsize units */
1786 /* node allocations are done in nodesize units */
1789 /* leaf allocations are done in leafsize units */
1796 u64 highest_objectid;
1798 u64 defrag_trans_start;
1799 struct btrfs_key defrag_progress;
1800 struct btrfs_key defrag_max;
1803 /* the dirty list is only used by non-reference counted roots */
1804 struct list_head dirty_list;
1806 struct list_head root_list;
1808 spinlock_t log_extents_lock[2];
1809 struct list_head logged_list[2];
1811 spinlock_t orphan_lock;
1812 atomic_t orphan_inodes;
1813 struct btrfs_block_rsv *orphan_block_rsv;
1814 int orphan_cleanup_state;
1816 spinlock_t inode_lock;
1817 /* red-black tree that keeps track of in-memory inodes */
1818 struct rb_root inode_tree;
1821 * radix tree that keeps track of delayed nodes of every inode,
1822 * protected by inode_lock
1824 struct radix_tree_root delayed_nodes_tree;
1826 * right now this just gets used so that a root has its own devid
1827 * for stat. It may be used for more later
1831 spinlock_t root_item_lock;
1834 struct mutex delalloc_mutex;
1835 spinlock_t delalloc_lock;
1837 * all of the inodes that have delalloc bytes. It is possible for
1838 * this list to be empty even when there is still dirty data=ordered
1839 * extents waiting to finish IO.
1841 struct list_head delalloc_inodes;
1842 struct list_head delalloc_root;
1843 u64 nr_delalloc_inodes;
1845 struct mutex ordered_extent_mutex;
1847 * this is used by the balancing code to wait for all the pending
1850 spinlock_t ordered_extent_lock;
1853 * all of the data=ordered extents pending writeback
1854 * these can span multiple transactions and basically include
1855 * every dirty data page that isn't from nodatacow
1857 struct list_head ordered_extents;
1858 struct list_head ordered_root;
1859 u64 nr_ordered_extents;
1862 * Number of currently running SEND ioctls to prevent
1863 * manipulation with the read-only status via SUBVOL_SETFLAGS
1865 int send_in_progress;
1866 struct btrfs_subvolume_writers *subv_writers;
1867 atomic_t will_be_snapshoted;
1870 struct btrfs_ioctl_defrag_range_args {
1871 /* start of the defrag operation */
1874 /* number of bytes to defrag, use (u64)-1 to say all */
1878 * flags for the operation, which can include turning
1879 * on compression for this one defrag
1884 * any extent bigger than this will be considered
1885 * already defragged. Use 0 to take the kernel default
1886 * Use 1 to say every single extent must be rewritten
1888 __u32 extent_thresh;
1891 * which compression method to use if turning on compression
1892 * for this defrag operation. If unspecified, zlib will
1895 __u32 compress_type;
1897 /* spare for later */
1903 * inode items have the data typically returned from stat and store other
1904 * info about object characteristics. There is one for every file and dir in
1907 #define BTRFS_INODE_ITEM_KEY 1
1908 #define BTRFS_INODE_REF_KEY 12
1909 #define BTRFS_INODE_EXTREF_KEY 13
1910 #define BTRFS_XATTR_ITEM_KEY 24
1911 #define BTRFS_ORPHAN_ITEM_KEY 48
1912 /* reserve 2-15 close to the inode for later flexibility */
1915 * dir items are the name -> inode pointers in a directory. There is one
1916 * for every name in a directory.
1918 #define BTRFS_DIR_LOG_ITEM_KEY 60
1919 #define BTRFS_DIR_LOG_INDEX_KEY 72
1920 #define BTRFS_DIR_ITEM_KEY 84
1921 #define BTRFS_DIR_INDEX_KEY 96
1923 * extent data is for file data
1925 #define BTRFS_EXTENT_DATA_KEY 108
1928 * extent csums are stored in a separate tree and hold csums for
1929 * an entire extent on disk.
1931 #define BTRFS_EXTENT_CSUM_KEY 128
1934 * root items point to tree roots. They are typically in the root
1935 * tree used by the super block to find all the other trees
1937 #define BTRFS_ROOT_ITEM_KEY 132
1940 * root backrefs tie subvols and snapshots to the directory entries that
1943 #define BTRFS_ROOT_BACKREF_KEY 144
1946 * root refs make a fast index for listing all of the snapshots and
1947 * subvolumes referenced by a given root. They point directly to the
1948 * directory item in the root that references the subvol
1950 #define BTRFS_ROOT_REF_KEY 156
1953 * extent items are in the extent map tree. These record which blocks
1954 * are used, and how many references there are to each block
1956 #define BTRFS_EXTENT_ITEM_KEY 168
1959 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1960 * the length, so we save the level in key->offset instead of the length.
1962 #define BTRFS_METADATA_ITEM_KEY 169
1964 #define BTRFS_TREE_BLOCK_REF_KEY 176
1966 #define BTRFS_EXTENT_DATA_REF_KEY 178
1968 #define BTRFS_EXTENT_REF_V0_KEY 180
1970 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1972 #define BTRFS_SHARED_DATA_REF_KEY 184
1975 * block groups give us hints into the extent allocation trees. Which
1976 * blocks are free etc etc
1978 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1980 #define BTRFS_DEV_EXTENT_KEY 204
1981 #define BTRFS_DEV_ITEM_KEY 216
1982 #define BTRFS_CHUNK_ITEM_KEY 228
1985 * Records the overall state of the qgroups.
1986 * There's only one instance of this key present,
1987 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1989 #define BTRFS_QGROUP_STATUS_KEY 240
1991 * Records the currently used space of the qgroup.
1992 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1994 #define BTRFS_QGROUP_INFO_KEY 242
1996 * Contains the user configured limits for the qgroup.
1997 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1999 #define BTRFS_QGROUP_LIMIT_KEY 244
2001 * Records the child-parent relationship of qgroups. For
2002 * each relation, 2 keys are present:
2003 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2004 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2006 #define BTRFS_QGROUP_RELATION_KEY 246
2008 #define BTRFS_BALANCE_ITEM_KEY 248
2011 * Persistantly stores the io stats in the device tree.
2012 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
2014 #define BTRFS_DEV_STATS_KEY 249
2017 * Persistantly stores the device replace state in the device tree.
2018 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2020 #define BTRFS_DEV_REPLACE_KEY 250
2023 * Stores items that allow to quickly map UUIDs to something else.
2024 * These items are part of the filesystem UUID tree.
2025 * The key is built like this:
2026 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2028 #if BTRFS_UUID_SIZE != 16
2029 #error "UUID items require BTRFS_UUID_SIZE == 16!"
2031 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2032 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2033 * received subvols */
2036 * string items are for debugging. They just store a short string of
2039 #define BTRFS_STRING_ITEM_KEY 253
2042 * Flags for mount options.
2044 * Note: don't forget to add new options to btrfs_show_options()
2046 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2047 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2048 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2049 #define BTRFS_MOUNT_SSD (1 << 3)
2050 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2051 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2052 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2053 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2054 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2055 #define BTRFS_MOUNT_NOSSD (1 << 9)
2056 #define BTRFS_MOUNT_DISCARD (1 << 10)
2057 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2058 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2059 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2060 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2061 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2062 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2063 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2064 #define BTRFS_MOUNT_RECOVERY (1 << 18)
2065 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2066 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2067 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2068 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2069 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2070 #define BTRFS_MOUNT_CHANGE_INODE_CACHE (1 << 24)
2072 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2074 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2075 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2076 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2077 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2079 #define btrfs_set_and_info(root, opt, fmt, args...) \
2081 if (!btrfs_test_opt(root, opt)) \
2082 btrfs_info(root->fs_info, fmt, ##args); \
2083 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2086 #define btrfs_clear_and_info(root, opt, fmt, args...) \
2088 if (btrfs_test_opt(root, opt)) \
2089 btrfs_info(root->fs_info, fmt, ##args); \
2090 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2096 #define BTRFS_INODE_NODATASUM (1 << 0)
2097 #define BTRFS_INODE_NODATACOW (1 << 1)
2098 #define BTRFS_INODE_READONLY (1 << 2)
2099 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2100 #define BTRFS_INODE_PREALLOC (1 << 4)
2101 #define BTRFS_INODE_SYNC (1 << 5)
2102 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2103 #define BTRFS_INODE_APPEND (1 << 7)
2104 #define BTRFS_INODE_NODUMP (1 << 8)
2105 #define BTRFS_INODE_NOATIME (1 << 9)
2106 #define BTRFS_INODE_DIRSYNC (1 << 10)
2107 #define BTRFS_INODE_COMPRESS (1 << 11)
2109 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2111 struct btrfs_map_token {
2112 struct extent_buffer *eb;
2114 unsigned long offset;
2117 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2119 token->kaddr = NULL;
2122 /* some macros to generate set/get funcs for the struct fields. This
2123 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2126 #define le8_to_cpu(v) (v)
2127 #define cpu_to_le8(v) (v)
2130 #define read_eb_member(eb, ptr, type, member, result) ( \
2131 read_extent_buffer(eb, (char *)(result), \
2132 ((unsigned long)(ptr)) + \
2133 offsetof(type, member), \
2134 sizeof(((type *)0)->member)))
2136 #define write_eb_member(eb, ptr, type, member, result) ( \
2137 write_extent_buffer(eb, (char *)(result), \
2138 ((unsigned long)(ptr)) + \
2139 offsetof(type, member), \
2140 sizeof(((type *)0)->member)))
2142 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2143 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2144 unsigned long off, \
2145 struct btrfs_map_token *token); \
2146 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2147 unsigned long off, u##bits val, \
2148 struct btrfs_map_token *token); \
2149 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2150 unsigned long off) \
2152 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2154 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2155 unsigned long off, u##bits val) \
2157 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2160 DECLARE_BTRFS_SETGET_BITS(8)
2161 DECLARE_BTRFS_SETGET_BITS(16)
2162 DECLARE_BTRFS_SETGET_BITS(32)
2163 DECLARE_BTRFS_SETGET_BITS(64)
2165 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2166 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2168 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2169 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2171 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2174 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2175 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2177 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2178 struct btrfs_map_token *token) \
2180 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2181 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2183 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2184 type *s, u##bits val, \
2185 struct btrfs_map_token *token) \
2187 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2188 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2191 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2192 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2194 type *p = page_address(eb->pages[0]); \
2195 u##bits res = le##bits##_to_cpu(p->member); \
2198 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2201 type *p = page_address(eb->pages[0]); \
2202 p->member = cpu_to_le##bits(val); \
2205 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2206 static inline u##bits btrfs_##name(type *s) \
2208 return le##bits##_to_cpu(s->member); \
2210 static inline void btrfs_set_##name(type *s, u##bits val) \
2212 s->member = cpu_to_le##bits(val); \
2215 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2216 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2217 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2218 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2219 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2220 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2222 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2223 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2224 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2225 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2226 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2227 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2229 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2230 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2232 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2234 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2236 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2238 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2240 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2241 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2243 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2245 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2247 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2250 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2252 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2255 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
2257 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
2260 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2261 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2262 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2263 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2264 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2265 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2266 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2267 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2268 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2269 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2270 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2272 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2274 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2277 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2278 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2279 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2281 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2283 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2285 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2287 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2288 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2290 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2292 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2293 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2295 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2298 unsigned long offset = (unsigned long)c;
2299 offset += offsetof(struct btrfs_chunk, stripe);
2300 offset += nr * sizeof(struct btrfs_stripe);
2301 return (struct btrfs_stripe *)offset;
2304 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2306 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2309 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2310 struct btrfs_chunk *c, int nr)
2312 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2315 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2316 struct btrfs_chunk *c, int nr)
2318 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2321 /* struct btrfs_block_group_item */
2322 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2324 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2326 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2327 struct btrfs_block_group_item, chunk_objectid, 64);
2329 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2330 struct btrfs_block_group_item, chunk_objectid, 64);
2331 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2332 struct btrfs_block_group_item, flags, 64);
2333 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2334 struct btrfs_block_group_item, flags, 64);
2336 /* struct btrfs_inode_ref */
2337 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2338 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2340 /* struct btrfs_inode_extref */
2341 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2342 parent_objectid, 64);
2343 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2345 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2347 /* struct btrfs_inode_item */
2348 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2349 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2350 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2351 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2352 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2353 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2354 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2355 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2356 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2357 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2358 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2359 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2360 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2362 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2364 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2366 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2367 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2369 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2371 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2372 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2373 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2374 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2375 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2376 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
2378 static inline struct btrfs_timespec *
2379 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
2381 unsigned long ptr = (unsigned long)inode_item;
2382 ptr += offsetof(struct btrfs_inode_item, atime);
2383 return (struct btrfs_timespec *)ptr;
2386 static inline struct btrfs_timespec *
2387 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
2389 unsigned long ptr = (unsigned long)inode_item;
2390 ptr += offsetof(struct btrfs_inode_item, mtime);
2391 return (struct btrfs_timespec *)ptr;
2394 static inline struct btrfs_timespec *
2395 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
2397 unsigned long ptr = (unsigned long)inode_item;
2398 ptr += offsetof(struct btrfs_inode_item, ctime);
2399 return (struct btrfs_timespec *)ptr;
2402 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2403 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2404 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2405 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
2407 /* struct btrfs_dev_extent */
2408 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2410 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2411 chunk_objectid, 64);
2412 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2414 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2416 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2418 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2419 return (unsigned long)dev + ptr;
2422 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2423 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2425 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2427 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2430 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2432 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2433 struct btrfs_tree_block_info *item,
2434 struct btrfs_disk_key *key)
2436 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2439 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2440 struct btrfs_tree_block_info *item,
2441 struct btrfs_disk_key *key)
2443 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2446 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2448 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2450 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2452 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2455 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2458 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2460 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2463 static inline u32 btrfs_extent_inline_ref_size(int type)
2465 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2466 type == BTRFS_SHARED_BLOCK_REF_KEY)
2467 return sizeof(struct btrfs_extent_inline_ref);
2468 if (type == BTRFS_SHARED_DATA_REF_KEY)
2469 return sizeof(struct btrfs_shared_data_ref) +
2470 sizeof(struct btrfs_extent_inline_ref);
2471 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2472 return sizeof(struct btrfs_extent_data_ref) +
2473 offsetof(struct btrfs_extent_inline_ref, offset);
2478 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2479 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2481 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2482 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2484 /* struct btrfs_node */
2485 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2486 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2487 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2489 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2492 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2495 ptr = offsetof(struct btrfs_node, ptrs) +
2496 sizeof(struct btrfs_key_ptr) * nr;
2497 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2500 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2504 ptr = offsetof(struct btrfs_node, ptrs) +
2505 sizeof(struct btrfs_key_ptr) * nr;
2506 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2509 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2512 ptr = offsetof(struct btrfs_node, ptrs) +
2513 sizeof(struct btrfs_key_ptr) * nr;
2514 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2517 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2521 ptr = offsetof(struct btrfs_node, ptrs) +
2522 sizeof(struct btrfs_key_ptr) * nr;
2523 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2526 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2528 return offsetof(struct btrfs_node, ptrs) +
2529 sizeof(struct btrfs_key_ptr) * nr;
2532 void btrfs_node_key(struct extent_buffer *eb,
2533 struct btrfs_disk_key *disk_key, int nr);
2535 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2536 struct btrfs_disk_key *disk_key, int nr)
2539 ptr = btrfs_node_key_ptr_offset(nr);
2540 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2541 struct btrfs_key_ptr, key, disk_key);
2544 /* struct btrfs_item */
2545 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2546 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2547 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2548 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2550 static inline unsigned long btrfs_item_nr_offset(int nr)
2552 return offsetof(struct btrfs_leaf, items) +
2553 sizeof(struct btrfs_item) * nr;
2556 static inline struct btrfs_item *btrfs_item_nr(int nr)
2558 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2561 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2562 struct btrfs_item *item)
2564 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2567 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2569 return btrfs_item_end(eb, btrfs_item_nr(nr));
2572 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2574 return btrfs_item_offset(eb, btrfs_item_nr(nr));
2577 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2579 return btrfs_item_size(eb, btrfs_item_nr(nr));
2582 static inline void btrfs_item_key(struct extent_buffer *eb,
2583 struct btrfs_disk_key *disk_key, int nr)
2585 struct btrfs_item *item = btrfs_item_nr(nr);
2586 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2589 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2590 struct btrfs_disk_key *disk_key, int nr)
2592 struct btrfs_item *item = btrfs_item_nr(nr);
2593 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2596 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2599 * struct btrfs_root_ref
2601 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2602 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2603 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2605 /* struct btrfs_dir_item */
2606 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2607 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2608 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2609 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2610 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2611 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2613 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2615 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2618 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2619 struct btrfs_dir_item *item,
2620 struct btrfs_disk_key *key)
2622 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2625 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2626 struct btrfs_dir_item *item,
2627 struct btrfs_disk_key *key)
2629 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2632 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2634 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2636 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2639 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2640 struct btrfs_free_space_header *h,
2641 struct btrfs_disk_key *key)
2643 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2646 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2647 struct btrfs_free_space_header *h,
2648 struct btrfs_disk_key *key)
2650 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2653 /* struct btrfs_disk_key */
2654 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2656 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2657 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2659 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2660 struct btrfs_disk_key *disk)
2662 cpu->offset = le64_to_cpu(disk->offset);
2663 cpu->type = disk->type;
2664 cpu->objectid = le64_to_cpu(disk->objectid);
2667 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2668 struct btrfs_key *cpu)
2670 disk->offset = cpu_to_le64(cpu->offset);
2671 disk->type = cpu->type;
2672 disk->objectid = cpu_to_le64(cpu->objectid);
2675 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2676 struct btrfs_key *key, int nr)
2678 struct btrfs_disk_key disk_key;
2679 btrfs_node_key(eb, &disk_key, nr);
2680 btrfs_disk_key_to_cpu(key, &disk_key);
2683 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2684 struct btrfs_key *key, int nr)
2686 struct btrfs_disk_key disk_key;
2687 btrfs_item_key(eb, &disk_key, nr);
2688 btrfs_disk_key_to_cpu(key, &disk_key);
2691 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2692 struct btrfs_dir_item *item,
2693 struct btrfs_key *key)
2695 struct btrfs_disk_key disk_key;
2696 btrfs_dir_item_key(eb, item, &disk_key);
2697 btrfs_disk_key_to_cpu(key, &disk_key);
2701 static inline u8 btrfs_key_type(struct btrfs_key *key)
2706 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2711 /* struct btrfs_header */
2712 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2713 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2715 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2716 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2717 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2718 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2719 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2721 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2722 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2724 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2726 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2728 return (btrfs_header_flags(eb) & flag) == flag;
2731 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2733 u64 flags = btrfs_header_flags(eb);
2734 btrfs_set_header_flags(eb, flags | flag);
2735 return (flags & flag) == flag;
2738 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2740 u64 flags = btrfs_header_flags(eb);
2741 btrfs_set_header_flags(eb, flags & ~flag);
2742 return (flags & flag) == flag;
2745 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2747 u64 flags = btrfs_header_flags(eb);
2748 return flags >> BTRFS_BACKREF_REV_SHIFT;
2751 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2754 u64 flags = btrfs_header_flags(eb);
2755 flags &= ~BTRFS_BACKREF_REV_MASK;
2756 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2757 btrfs_set_header_flags(eb, flags);
2760 static inline unsigned long btrfs_header_fsid(void)
2762 return offsetof(struct btrfs_header, fsid);
2765 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2767 return offsetof(struct btrfs_header, chunk_tree_uuid);
2770 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2772 return btrfs_header_level(eb) == 0;
2775 /* struct btrfs_root_item */
2776 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2778 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2779 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2780 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2782 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2784 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2785 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2786 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2787 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2788 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2789 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2790 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2791 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2793 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2795 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2797 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2799 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2801 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2804 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2806 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2809 static inline bool btrfs_root_dead(struct btrfs_root *root)
2811 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2814 /* struct btrfs_root_backup */
2815 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2817 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2819 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2820 tree_root_level, 8);
2822 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2824 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2825 chunk_root_gen, 64);
2826 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2827 chunk_root_level, 8);
2829 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2831 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2832 extent_root_gen, 64);
2833 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2834 extent_root_level, 8);
2836 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2838 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2840 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2843 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2845 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2847 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2850 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2852 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2854 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2855 csum_root_level, 8);
2856 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2858 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2860 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2863 /* struct btrfs_balance_item */
2864 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2866 static inline void btrfs_balance_data(struct extent_buffer *eb,
2867 struct btrfs_balance_item *bi,
2868 struct btrfs_disk_balance_args *ba)
2870 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2873 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2874 struct btrfs_balance_item *bi,
2875 struct btrfs_disk_balance_args *ba)
2877 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2880 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2881 struct btrfs_balance_item *bi,
2882 struct btrfs_disk_balance_args *ba)
2884 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2887 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2888 struct btrfs_balance_item *bi,
2889 struct btrfs_disk_balance_args *ba)
2891 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2894 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2895 struct btrfs_balance_item *bi,
2896 struct btrfs_disk_balance_args *ba)
2898 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2901 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2902 struct btrfs_balance_item *bi,
2903 struct btrfs_disk_balance_args *ba)
2905 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2909 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2910 struct btrfs_disk_balance_args *disk)
2912 memset(cpu, 0, sizeof(*cpu));
2914 cpu->profiles = le64_to_cpu(disk->profiles);
2915 cpu->usage = le64_to_cpu(disk->usage);
2916 cpu->devid = le64_to_cpu(disk->devid);
2917 cpu->pstart = le64_to_cpu(disk->pstart);
2918 cpu->pend = le64_to_cpu(disk->pend);
2919 cpu->vstart = le64_to_cpu(disk->vstart);
2920 cpu->vend = le64_to_cpu(disk->vend);
2921 cpu->target = le64_to_cpu(disk->target);
2922 cpu->flags = le64_to_cpu(disk->flags);
2923 cpu->limit = le64_to_cpu(disk->limit);
2927 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2928 struct btrfs_balance_args *cpu)
2930 memset(disk, 0, sizeof(*disk));
2932 disk->profiles = cpu_to_le64(cpu->profiles);
2933 disk->usage = cpu_to_le64(cpu->usage);
2934 disk->devid = cpu_to_le64(cpu->devid);
2935 disk->pstart = cpu_to_le64(cpu->pstart);
2936 disk->pend = cpu_to_le64(cpu->pend);
2937 disk->vstart = cpu_to_le64(cpu->vstart);
2938 disk->vend = cpu_to_le64(cpu->vend);
2939 disk->target = cpu_to_le64(cpu->target);
2940 disk->flags = cpu_to_le64(cpu->flags);
2941 disk->limit = cpu_to_le64(cpu->limit);
2944 /* struct btrfs_super_block */
2945 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2946 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2947 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2949 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2950 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2951 struct btrfs_super_block, sys_chunk_array_size, 32);
2952 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2953 struct btrfs_super_block, chunk_root_generation, 64);
2954 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2956 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2958 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2959 chunk_root_level, 8);
2960 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2962 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2963 log_root_transid, 64);
2964 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2966 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2968 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2970 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2972 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2974 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2976 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2978 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2979 root_dir_objectid, 64);
2980 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2982 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2984 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2985 compat_ro_flags, 64);
2986 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2987 incompat_flags, 64);
2988 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2990 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2991 cache_generation, 64);
2992 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2993 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2994 uuid_tree_generation, 64);
2996 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2998 u16 t = btrfs_super_csum_type(s);
3000 * csum type is validated at mount time
3002 return btrfs_csum_sizes[t];
3005 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
3007 return offsetof(struct btrfs_leaf, items);
3010 /* struct btrfs_file_extent_item */
3011 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
3012 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
3013 struct btrfs_file_extent_item, disk_bytenr, 64);
3014 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
3015 struct btrfs_file_extent_item, offset, 64);
3016 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
3017 struct btrfs_file_extent_item, generation, 64);
3018 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
3019 struct btrfs_file_extent_item, num_bytes, 64);
3020 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
3021 struct btrfs_file_extent_item, disk_num_bytes, 64);
3022 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
3023 struct btrfs_file_extent_item, compression, 8);
3025 static inline unsigned long
3026 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
3028 unsigned long offset = (unsigned long)e;
3029 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
3033 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
3035 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
3038 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
3040 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
3042 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
3043 disk_num_bytes, 64);
3044 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
3046 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
3048 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
3050 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
3052 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
3054 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
3055 other_encoding, 16);
3058 * this returns the number of bytes used by the item on disk, minus the
3059 * size of any extent headers. If a file is compressed on disk, this is
3060 * the compressed size
3062 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
3063 struct btrfs_item *e)
3065 unsigned long offset;
3066 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
3067 return btrfs_item_size(eb, e) - offset;
3070 /* this returns the number of file bytes represented by the inline item.
3071 * If an item is compressed, this is the uncompressed size
3073 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3075 struct btrfs_file_extent_item *fi)
3077 struct btrfs_map_token token;
3079 btrfs_init_map_token(&token);
3081 * return the space used on disk if this item isn't
3082 * compressed or encoded
3084 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3085 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3086 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3087 return btrfs_file_extent_inline_item_len(eb,
3088 btrfs_item_nr(slot));
3091 /* otherwise use the ram bytes field */
3092 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3096 /* btrfs_dev_stats_item */
3097 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3098 struct btrfs_dev_stats_item *ptr,
3103 read_extent_buffer(eb, &val,
3104 offsetof(struct btrfs_dev_stats_item, values) +
3105 ((unsigned long)ptr) + (index * sizeof(u64)),
3110 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3111 struct btrfs_dev_stats_item *ptr,
3114 write_extent_buffer(eb, &val,
3115 offsetof(struct btrfs_dev_stats_item, values) +
3116 ((unsigned long)ptr) + (index * sizeof(u64)),
3120 /* btrfs_qgroup_status_item */
3121 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3123 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3125 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3127 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3130 /* btrfs_qgroup_info_item */
3131 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3133 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3134 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3136 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3137 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3140 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3141 struct btrfs_qgroup_info_item, generation, 64);
3142 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3144 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3145 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3146 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3148 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3149 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3151 /* btrfs_qgroup_limit_item */
3152 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3154 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3156 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3158 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3160 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3163 /* btrfs_dev_replace_item */
3164 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3165 struct btrfs_dev_replace_item, src_devid, 64);
3166 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3167 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3169 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3171 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3173 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3175 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3176 num_write_errors, 64);
3177 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3178 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3180 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3182 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3185 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3186 struct btrfs_dev_replace_item, src_devid, 64);
3187 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3188 struct btrfs_dev_replace_item,
3189 cont_reading_from_srcdev_mode, 64);
3190 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3191 struct btrfs_dev_replace_item, replace_state, 64);
3192 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3193 struct btrfs_dev_replace_item, time_started, 64);
3194 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3195 struct btrfs_dev_replace_item, time_stopped, 64);
3196 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3197 struct btrfs_dev_replace_item, num_write_errors, 64);
3198 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3199 struct btrfs_dev_replace_item,
3200 num_uncorrectable_read_errors, 64);
3201 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3202 struct btrfs_dev_replace_item, cursor_left, 64);
3203 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3204 struct btrfs_dev_replace_item, cursor_right, 64);
3206 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
3208 return sb->s_fs_info;
3211 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
3214 return root->leafsize;
3215 return root->nodesize;
3218 /* helper function to cast into the data area of the leaf. */
3219 #define btrfs_item_ptr(leaf, slot, type) \
3220 ((type *)(btrfs_leaf_data(leaf) + \
3221 btrfs_item_offset_nr(leaf, slot)))
3223 #define btrfs_item_ptr_offset(leaf, slot) \
3224 ((unsigned long)(btrfs_leaf_data(leaf) + \
3225 btrfs_item_offset_nr(leaf, slot)))
3227 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3229 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3230 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3233 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3235 return mapping_gfp_mask(mapping) & ~__GFP_FS;
3239 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3242 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3247 * Doing a truncate won't result in new nodes or leaves, just what we need for
3250 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3253 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3257 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3258 struct btrfs_root *root);
3259 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3260 struct btrfs_root *root);
3261 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3262 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3263 struct btrfs_root *root, unsigned long count);
3264 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
3265 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3266 struct btrfs_root *root, u64 bytenr,
3267 u64 offset, int metadata, u64 *refs, u64 *flags);
3268 int btrfs_pin_extent(struct btrfs_root *root,
3269 u64 bytenr, u64 num, int reserved);
3270 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3271 u64 bytenr, u64 num_bytes);
3272 int btrfs_exclude_logged_extents(struct btrfs_root *root,
3273 struct extent_buffer *eb);
3274 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3275 struct btrfs_root *root,
3276 u64 objectid, u64 offset, u64 bytenr);
3277 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3278 struct btrfs_fs_info *info,
3280 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3281 int get_block_group_index(struct btrfs_block_group_cache *cache);
3282 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
3283 struct btrfs_root *root, u32 blocksize,
3284 u64 parent, u64 root_objectid,
3285 struct btrfs_disk_key *key, int level,
3286 u64 hint, u64 empty_size);
3287 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3288 struct btrfs_root *root,
3289 struct extent_buffer *buf,
3290 u64 parent, int last_ref);
3291 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3292 struct btrfs_root *root,
3293 u64 root_objectid, u64 owner,
3294 u64 offset, struct btrfs_key *ins);
3295 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3296 struct btrfs_root *root,
3297 u64 root_objectid, u64 owner, u64 offset,
3298 struct btrfs_key *ins);
3299 int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3300 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3301 struct btrfs_key *ins, int is_data);
3302 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3303 struct extent_buffer *buf, int full_backref, int for_cow);
3304 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3305 struct extent_buffer *buf, int full_backref, int for_cow);
3306 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3307 struct btrfs_root *root,
3308 u64 bytenr, u64 num_bytes, u64 flags,
3309 int level, int is_data);
3310 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3311 struct btrfs_root *root,
3312 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3313 u64 owner, u64 offset, int for_cow);
3315 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
3316 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3317 u64 start, u64 len);
3318 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3319 struct btrfs_root *root);
3320 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3321 struct btrfs_root *root);
3322 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3323 struct btrfs_root *root,
3324 u64 bytenr, u64 num_bytes, u64 parent,
3325 u64 root_objectid, u64 owner, u64 offset, int for_cow);
3327 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3328 struct btrfs_root *root);
3329 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3330 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3331 int btrfs_read_block_groups(struct btrfs_root *root);
3332 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3333 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3334 struct btrfs_root *root, u64 bytes_used,
3335 u64 type, u64 chunk_objectid, u64 chunk_offset,
3337 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3338 struct btrfs_root *root, u64 group_start);
3339 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3340 struct btrfs_root *root);
3341 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3342 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3344 enum btrfs_reserve_flush_enum {
3345 /* If we are in the transaction, we can't flush anything.*/
3346 BTRFS_RESERVE_NO_FLUSH,
3348 * Flushing delalloc may cause deadlock somewhere, in this
3349 * case, use FLUSH LIMIT
3351 BTRFS_RESERVE_FLUSH_LIMIT,
3352 BTRFS_RESERVE_FLUSH_ALL,
3355 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
3356 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3357 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3358 struct btrfs_root *root);
3359 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3360 struct inode *inode);
3361 void btrfs_orphan_release_metadata(struct inode *inode);
3362 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3363 struct btrfs_block_rsv *rsv,
3365 u64 *qgroup_reserved, bool use_global_rsv);
3366 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3367 struct btrfs_block_rsv *rsv,
3368 u64 qgroup_reserved);
3369 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3370 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3371 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3372 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3373 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3374 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3375 unsigned short type);
3376 void btrfs_free_block_rsv(struct btrfs_root *root,
3377 struct btrfs_block_rsv *rsv);
3378 int btrfs_block_rsv_add(struct btrfs_root *root,
3379 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3380 enum btrfs_reserve_flush_enum flush);
3381 int btrfs_block_rsv_check(struct btrfs_root *root,
3382 struct btrfs_block_rsv *block_rsv, int min_factor);
3383 int btrfs_block_rsv_refill(struct btrfs_root *root,
3384 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3385 enum btrfs_reserve_flush_enum flush);
3386 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3387 struct btrfs_block_rsv *dst_rsv,
3389 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3390 struct btrfs_block_rsv *dest, u64 num_bytes,
3392 void btrfs_block_rsv_release(struct btrfs_root *root,
3393 struct btrfs_block_rsv *block_rsv,
3395 int btrfs_set_block_group_ro(struct btrfs_root *root,
3396 struct btrfs_block_group_cache *cache);
3397 void btrfs_set_block_group_rw(struct btrfs_root *root,
3398 struct btrfs_block_group_cache *cache);
3399 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3400 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3401 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3402 u64 start, u64 end);
3403 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
3404 u64 num_bytes, u64 *actual_bytes);
3405 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3406 struct btrfs_root *root, u64 type);
3407 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3409 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3410 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3411 struct btrfs_fs_info *fs_info);
3412 int __get_raid_index(u64 flags);
3414 int btrfs_start_nocow_write(struct btrfs_root *root);
3415 void btrfs_end_nocow_write(struct btrfs_root *root);
3417 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3418 int level, int *slot);
3419 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3420 int btrfs_previous_item(struct btrfs_root *root,
3421 struct btrfs_path *path, u64 min_objectid,
3423 int btrfs_previous_extent_item(struct btrfs_root *root,
3424 struct btrfs_path *path, u64 min_objectid);
3425 void btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
3426 struct btrfs_key *new_key);
3427 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3428 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3429 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3430 struct btrfs_key *key, int lowest_level,
3432 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3433 struct btrfs_path *path,
3435 enum btrfs_compare_tree_result {
3436 BTRFS_COMPARE_TREE_NEW,
3437 BTRFS_COMPARE_TREE_DELETED,
3438 BTRFS_COMPARE_TREE_CHANGED,
3439 BTRFS_COMPARE_TREE_SAME,
3441 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3442 struct btrfs_root *right_root,
3443 struct btrfs_path *left_path,
3444 struct btrfs_path *right_path,
3445 struct btrfs_key *key,
3446 enum btrfs_compare_tree_result result,
3448 int btrfs_compare_trees(struct btrfs_root *left_root,
3449 struct btrfs_root *right_root,
3450 btrfs_changed_cb_t cb, void *ctx);
3451 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3452 struct btrfs_root *root, struct extent_buffer *buf,
3453 struct extent_buffer *parent, int parent_slot,
3454 struct extent_buffer **cow_ret);
3455 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3456 struct btrfs_root *root,
3457 struct extent_buffer *buf,
3458 struct extent_buffer **cow_ret, u64 new_root_objectid);
3459 int btrfs_block_can_be_shared(struct btrfs_root *root,
3460 struct extent_buffer *buf);
3461 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3463 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3464 u32 new_size, int from_end);
3465 int btrfs_split_item(struct btrfs_trans_handle *trans,
3466 struct btrfs_root *root,
3467 struct btrfs_path *path,
3468 struct btrfs_key *new_key,
3469 unsigned long split_offset);
3470 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3471 struct btrfs_root *root,
3472 struct btrfs_path *path,
3473 struct btrfs_key *new_key);
3474 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
3475 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
3476 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3477 *root, struct btrfs_key *key, struct btrfs_path *p, int
3479 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3480 struct btrfs_path *p, u64 time_seq);
3481 int btrfs_search_slot_for_read(struct btrfs_root *root,
3482 struct btrfs_key *key, struct btrfs_path *p,
3483 int find_higher, int return_any);
3484 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3485 struct btrfs_root *root, struct extent_buffer *parent,
3486 int start_slot, u64 *last_ret,
3487 struct btrfs_key *progress);
3488 void btrfs_release_path(struct btrfs_path *p);
3489 struct btrfs_path *btrfs_alloc_path(void);
3490 void btrfs_free_path(struct btrfs_path *p);
3491 void btrfs_set_path_blocking(struct btrfs_path *p);
3492 void btrfs_clear_path_blocking(struct btrfs_path *p,
3493 struct extent_buffer *held, int held_rw);
3494 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3496 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3497 struct btrfs_path *path, int slot, int nr);
3498 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3499 struct btrfs_root *root,
3500 struct btrfs_path *path)
3502 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3505 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3506 struct btrfs_key *cpu_key, u32 *data_size,
3507 u32 total_data, u32 total_size, int nr);
3508 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3509 *root, struct btrfs_key *key, void *data, u32 data_size);
3510 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3511 struct btrfs_root *root,
3512 struct btrfs_path *path,
3513 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3515 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3516 struct btrfs_root *root,
3517 struct btrfs_path *path,
3518 struct btrfs_key *key,
3521 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3524 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3525 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3526 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3528 static inline int btrfs_next_old_item(struct btrfs_root *root,
3529 struct btrfs_path *p, u64 time_seq)
3532 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3533 return btrfs_next_old_leaf(root, p, time_seq);
3536 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3538 return btrfs_next_old_item(root, p, 0);
3540 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3541 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3542 struct btrfs_block_rsv *block_rsv,
3543 int update_ref, int for_reloc);
3544 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3545 struct btrfs_root *root,
3546 struct extent_buffer *node,
3547 struct extent_buffer *parent);
3548 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3551 * Get synced with close_ctree()
3554 return fs_info->closing;
3558 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3559 * anything except sleeping. This function is used to check the status of
3562 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3564 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3565 btrfs_fs_closing(root->fs_info));
3568 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3570 kfree(fs_info->balance_ctl);
3571 kfree(fs_info->delayed_root);
3572 kfree(fs_info->extent_root);
3573 kfree(fs_info->tree_root);
3574 kfree(fs_info->chunk_root);
3575 kfree(fs_info->dev_root);
3576 kfree(fs_info->csum_root);
3577 kfree(fs_info->quota_root);
3578 kfree(fs_info->uuid_root);
3579 kfree(fs_info->super_copy);
3580 kfree(fs_info->super_for_commit);
3584 /* tree mod log functions from ctree.c */
3585 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3586 struct seq_list *elem);
3587 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3588 struct seq_list *elem);
3589 u64 btrfs_tree_mod_seq_prev(u64 seq);
3590 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3593 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3594 struct btrfs_path *path,
3595 u64 root_id, u64 ref_id);
3596 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3597 struct btrfs_root *tree_root,
3598 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3599 const char *name, int name_len);
3600 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3601 struct btrfs_root *tree_root,
3602 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3603 const char *name, int name_len);
3604 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3605 struct btrfs_key *key);
3606 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3607 *root, struct btrfs_key *key, struct btrfs_root_item
3609 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3610 struct btrfs_root *root,
3611 struct btrfs_key *key,
3612 struct btrfs_root_item *item);
3613 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3614 struct btrfs_path *path, struct btrfs_root_item *root_item,
3615 struct btrfs_key *root_key);
3616 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3617 void btrfs_set_root_node(struct btrfs_root_item *item,
3618 struct extent_buffer *node);
3619 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3620 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3621 struct btrfs_root *root);
3624 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3625 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3627 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3628 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3630 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3631 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3635 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3636 const char *name, int name_len);
3637 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3638 struct btrfs_root *root, const char *name,
3639 int name_len, struct inode *dir,
3640 struct btrfs_key *location, u8 type, u64 index);
3641 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3642 struct btrfs_root *root,
3643 struct btrfs_path *path, u64 dir,
3644 const char *name, int name_len,
3646 struct btrfs_dir_item *
3647 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3648 struct btrfs_root *root,
3649 struct btrfs_path *path, u64 dir,
3650 u64 objectid, const char *name, int name_len,
3652 struct btrfs_dir_item *
3653 btrfs_search_dir_index_item(struct btrfs_root *root,
3654 struct btrfs_path *path, u64 dirid,
3655 const char *name, int name_len);
3656 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3657 struct btrfs_root *root,
3658 struct btrfs_path *path,
3659 struct btrfs_dir_item *di);
3660 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3661 struct btrfs_root *root,
3662 struct btrfs_path *path, u64 objectid,
3663 const char *name, u16 name_len,
3664 const void *data, u16 data_len);
3665 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3666 struct btrfs_root *root,
3667 struct btrfs_path *path, u64 dir,
3668 const char *name, u16 name_len,
3670 int verify_dir_item(struct btrfs_root *root,
3671 struct extent_buffer *leaf,
3672 struct btrfs_dir_item *dir_item);
3675 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3676 struct btrfs_root *root, u64 offset);
3677 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3678 struct btrfs_root *root, u64 offset);
3679 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3682 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3683 struct btrfs_root *root,
3684 const char *name, int name_len,
3685 u64 inode_objectid, u64 ref_objectid, u64 index);
3686 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3687 struct btrfs_root *root,
3688 const char *name, int name_len,
3689 u64 inode_objectid, u64 ref_objectid, u64 *index);
3690 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3691 struct btrfs_root *root,
3692 struct btrfs_path *path, u64 objectid);
3693 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3694 *root, struct btrfs_path *path,
3695 struct btrfs_key *location, int mod);
3697 struct btrfs_inode_extref *
3698 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3699 struct btrfs_root *root,
3700 struct btrfs_path *path,
3701 const char *name, int name_len,
3702 u64 inode_objectid, u64 ref_objectid, int ins_len,
3705 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3706 u64 ref_objectid, const char *name,
3708 struct btrfs_inode_extref **extref_ret);
3711 struct btrfs_dio_private;
3712 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3713 struct btrfs_root *root, u64 bytenr, u64 len);
3714 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3715 struct bio *bio, u32 *dst);
3716 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3717 struct btrfs_dio_private *dip, struct bio *bio,
3718 u64 logical_offset);
3719 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3720 struct btrfs_root *root,
3721 u64 objectid, u64 pos,
3722 u64 disk_offset, u64 disk_num_bytes,
3723 u64 num_bytes, u64 offset, u64 ram_bytes,
3724 u8 compression, u8 encryption, u16 other_encoding);
3725 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3726 struct btrfs_root *root,
3727 struct btrfs_path *path, u64 objectid,
3728 u64 bytenr, int mod);
3729 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3730 struct btrfs_root *root,
3731 struct btrfs_ordered_sum *sums);
3732 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3733 struct bio *bio, u64 file_start, int contig);
3734 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3735 struct list_head *list, int search_commit);
3737 struct btrfs_delalloc_work {
3738 struct inode *inode;
3741 struct completion completion;
3742 struct list_head list;
3743 struct btrfs_work work;
3746 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3747 int wait, int delay_iput);
3748 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3750 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3751 size_t pg_offset, u64 start, u64 len,
3753 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3754 u64 *orig_start, u64 *orig_block_len,
3757 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3758 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3759 #define ClearPageChecked ClearPageFsMisc
3760 #define SetPageChecked SetPageFsMisc
3761 #define PageChecked PageFsMisc
3764 /* This forces readahead on a given range of bytes in an inode */
3765 static inline void btrfs_force_ra(struct address_space *mapping,
3766 struct file_ra_state *ra, struct file *file,
3767 pgoff_t offset, unsigned long req_size)
3769 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3772 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3773 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3774 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3775 struct btrfs_root *root,
3776 struct inode *dir, struct inode *inode,
3777 const char *name, int name_len);
3778 int btrfs_add_link(struct btrfs_trans_handle *trans,
3779 struct inode *parent_inode, struct inode *inode,
3780 const char *name, int name_len, int add_backref, u64 index);
3781 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3782 struct btrfs_root *root,
3783 struct inode *dir, u64 objectid,
3784 const char *name, int name_len);
3785 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3787 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3788 struct btrfs_root *root,
3789 struct inode *inode, u64 new_size,
3792 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3793 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3795 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3796 struct extent_state **cached_state);
3797 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3798 struct btrfs_root *new_root,
3799 struct btrfs_root *parent_root,
3801 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3802 size_t size, struct bio *bio,
3803 unsigned long bio_flags);
3804 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3805 int btrfs_readpage(struct file *file, struct page *page);
3806 void btrfs_evict_inode(struct inode *inode);
3807 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3808 struct inode *btrfs_alloc_inode(struct super_block *sb);
3809 void btrfs_destroy_inode(struct inode *inode);
3810 int btrfs_drop_inode(struct inode *inode);
3811 int btrfs_init_cachep(void);
3812 void btrfs_destroy_cachep(void);
3813 long btrfs_ioctl_trans_end(struct file *file);
3814 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3815 struct btrfs_root *root, int *was_new);
3816 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3817 size_t pg_offset, u64 start, u64 end,
3819 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3820 struct btrfs_root *root,
3821 struct inode *inode);
3822 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3823 struct btrfs_root *root, struct inode *inode);
3824 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3825 int btrfs_orphan_cleanup(struct btrfs_root *root);
3826 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3827 struct btrfs_root *root);
3828 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3829 void btrfs_invalidate_inodes(struct btrfs_root *root);
3830 void btrfs_add_delayed_iput(struct inode *inode);
3831 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3832 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3833 u64 start, u64 num_bytes, u64 min_size,
3834 loff_t actual_len, u64 *alloc_hint);
3835 int btrfs_prealloc_file_range_trans(struct inode *inode,
3836 struct btrfs_trans_handle *trans, int mode,
3837 u64 start, u64 num_bytes, u64 min_size,
3838 loff_t actual_len, u64 *alloc_hint);
3839 extern const struct dentry_operations btrfs_dentry_operations;
3842 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3843 void btrfs_update_iflags(struct inode *inode);
3844 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3845 int btrfs_is_empty_uuid(u8 *uuid);
3846 int btrfs_defrag_file(struct inode *inode, struct file *file,
3847 struct btrfs_ioctl_defrag_range_args *range,
3848 u64 newer_than, unsigned long max_pages);
3849 void btrfs_get_block_group_info(struct list_head *groups_list,
3850 struct btrfs_ioctl_space_info *space);
3851 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3852 struct btrfs_ioctl_balance_args *bargs);
3856 int btrfs_auto_defrag_init(void);
3857 void btrfs_auto_defrag_exit(void);
3858 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3859 struct inode *inode);
3860 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3861 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3862 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3863 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3865 extern const struct file_operations btrfs_file_operations;
3866 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3867 struct btrfs_root *root, struct inode *inode,
3868 struct btrfs_path *path, u64 start, u64 end,
3869 u64 *drop_end, int drop_cache,
3871 u32 extent_item_size,
3873 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3874 struct btrfs_root *root, struct inode *inode, u64 start,
3875 u64 end, int drop_cache);
3876 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3877 struct inode *inode, u64 start, u64 end);
3878 int btrfs_release_file(struct inode *inode, struct file *file);
3879 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3880 struct page **pages, size_t num_pages,
3881 loff_t pos, size_t write_bytes,
3882 struct extent_state **cached);
3885 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3886 struct btrfs_root *root);
3889 int btrfs_init_sysfs(void);
3890 void btrfs_exit_sysfs(void);
3891 int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info);
3892 void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info);
3895 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3898 int btrfs_parse_options(struct btrfs_root *root, char *options);
3899 int btrfs_sync_fs(struct super_block *sb, int wait);
3901 #ifdef CONFIG_PRINTK
3903 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3905 static inline __printf(2, 3)
3906 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3911 #define btrfs_emerg(fs_info, fmt, args...) \
3912 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3913 #define btrfs_alert(fs_info, fmt, args...) \
3914 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3915 #define btrfs_crit(fs_info, fmt, args...) \
3916 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3917 #define btrfs_err(fs_info, fmt, args...) \
3918 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3919 #define btrfs_warn(fs_info, fmt, args...) \
3920 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3921 #define btrfs_notice(fs_info, fmt, args...) \
3922 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3923 #define btrfs_info(fs_info, fmt, args...) \
3924 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3927 #define btrfs_debug(fs_info, fmt, args...) \
3928 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3930 #define btrfs_debug(fs_info, fmt, args...) \
3931 no_printk(KERN_DEBUG fmt, ##args)
3934 #ifdef CONFIG_BTRFS_ASSERT
3936 static inline void assfail(char *expr, char *file, int line)
3938 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3943 #define ASSERT(expr) \
3944 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3946 #define ASSERT(expr) ((void)0)
3949 #define btrfs_assert()
3951 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3952 unsigned int line, int errno, const char *fmt, ...);
3955 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3956 struct btrfs_root *root, const char *function,
3957 unsigned int line, int errno);
3959 #define btrfs_set_fs_incompat(__fs_info, opt) \
3960 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3962 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3965 struct btrfs_super_block *disk_super;
3968 disk_super = fs_info->super_copy;
3969 features = btrfs_super_incompat_flags(disk_super);
3970 if (!(features & flag)) {
3971 spin_lock(&fs_info->super_lock);
3972 features = btrfs_super_incompat_flags(disk_super);
3973 if (!(features & flag)) {
3975 btrfs_set_super_incompat_flags(disk_super, features);
3976 btrfs_info(fs_info, "setting %llu feature flag",
3979 spin_unlock(&fs_info->super_lock);
3983 #define btrfs_fs_incompat(fs_info, opt) \
3984 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3986 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3988 struct btrfs_super_block *disk_super;
3989 disk_super = fs_info->super_copy;
3990 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3994 * Call btrfs_abort_transaction as early as possible when an error condition is
3995 * detected, that way the exact line number is reported.
3998 #define btrfs_abort_transaction(trans, root, errno) \
4000 __btrfs_abort_transaction(trans, root, __func__, \
4004 #define btrfs_std_error(fs_info, errno) \
4007 __btrfs_std_error((fs_info), __func__, \
4008 __LINE__, (errno), NULL); \
4011 #define btrfs_error(fs_info, errno, fmt, args...) \
4013 __btrfs_std_error((fs_info), __func__, __LINE__, \
4014 (errno), fmt, ##args); \
4018 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
4019 unsigned int line, int errno, const char *fmt, ...);
4022 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4023 * will panic(). Otherwise we BUG() here.
4025 #define btrfs_panic(fs_info, errno, fmt, args...) \
4027 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4032 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4033 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
4034 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
4035 int btrfs_init_acl(struct btrfs_trans_handle *trans,
4036 struct inode *inode, struct inode *dir);
4038 #define btrfs_get_acl NULL
4039 #define btrfs_set_acl NULL
4040 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
4041 struct inode *inode, struct inode *dir)
4048 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
4049 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
4050 struct btrfs_root *root);
4051 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
4052 struct btrfs_root *root);
4053 int btrfs_recover_relocation(struct btrfs_root *root);
4054 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
4055 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
4056 struct btrfs_root *root, struct extent_buffer *buf,
4057 struct extent_buffer *cow);
4058 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
4059 struct btrfs_pending_snapshot *pending,
4060 u64 *bytes_to_reserve);
4061 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4062 struct btrfs_pending_snapshot *pending);
4065 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
4066 u64 end, struct btrfs_scrub_progress *progress,
4067 int readonly, int is_dev_replace);
4068 void btrfs_scrub_pause(struct btrfs_root *root);
4069 void btrfs_scrub_continue(struct btrfs_root *root);
4070 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4071 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4072 struct btrfs_device *dev);
4073 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4074 struct btrfs_scrub_progress *progress);
4077 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
4078 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
4079 void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info);
4082 struct reada_control {
4083 struct btrfs_root *root; /* tree to prefetch */
4084 struct btrfs_key key_start;
4085 struct btrfs_key key_end; /* exclusive */
4088 wait_queue_head_t wait;
4090 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4091 struct btrfs_key *start, struct btrfs_key *end);
4092 int btrfs_reada_wait(void *handle);
4093 void btrfs_reada_detach(void *handle);
4094 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
4095 u64 start, int err);
4098 struct qgroup_update {
4099 struct list_head list;
4100 struct btrfs_delayed_ref_node *node;
4101 struct btrfs_delayed_extent_op *extent_op;
4104 int btrfs_quota_enable(struct btrfs_trans_handle *trans,
4105 struct btrfs_fs_info *fs_info);
4106 int btrfs_quota_disable(struct btrfs_trans_handle *trans,
4107 struct btrfs_fs_info *fs_info);
4108 int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info);
4109 void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info);
4110 int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info);
4111 int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
4112 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
4113 int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
4114 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
4115 int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
4116 struct btrfs_fs_info *fs_info, u64 qgroupid,
4118 int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
4119 struct btrfs_fs_info *fs_info, u64 qgroupid);
4120 int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
4121 struct btrfs_fs_info *fs_info, u64 qgroupid,
4122 struct btrfs_qgroup_limit *limit);
4123 int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
4124 void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
4125 struct btrfs_delayed_extent_op;
4126 int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
4127 struct btrfs_delayed_ref_node *node,
4128 struct btrfs_delayed_extent_op *extent_op);
4129 int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
4130 struct btrfs_fs_info *fs_info,
4131 struct btrfs_delayed_ref_node *node,
4132 struct btrfs_delayed_extent_op *extent_op);
4133 int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
4134 struct btrfs_fs_info *fs_info);
4135 int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
4136 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
4137 struct btrfs_qgroup_inherit *inherit);
4138 int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
4139 void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
4141 void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
4143 static inline int is_fstree(u64 rootid)
4145 if (rootid == BTRFS_FS_TREE_OBJECTID ||
4146 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
4151 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4153 return signal_pending(current);
4156 /* Sanity test specific functions */
4157 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4158 void btrfs_test_destroy_inode(struct inode *inode);