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 struct rb_root qgroup_op_tree;
1652 spinlock_t qgroup_lock;
1653 spinlock_t qgroup_op_lock;
1654 atomic_t qgroup_op_seq;
1657 * used to avoid frequently calling ulist_alloc()/ulist_free()
1658 * when doing qgroup accounting, it must be protected by qgroup_lock.
1660 struct ulist *qgroup_ulist;
1662 /* protect user change for quota operations */
1663 struct mutex qgroup_ioctl_lock;
1665 /* list of dirty qgroups to be written at next commit */
1666 struct list_head dirty_qgroups;
1668 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1671 /* qgroup rescan items */
1672 struct mutex qgroup_rescan_lock; /* protects the progress item */
1673 struct btrfs_key qgroup_rescan_progress;
1674 struct btrfs_workqueue *qgroup_rescan_workers;
1675 struct completion qgroup_rescan_completion;
1676 struct btrfs_work qgroup_rescan_work;
1678 /* filesystem state */
1679 unsigned long fs_state;
1681 struct btrfs_delayed_root *delayed_root;
1683 /* readahead tree */
1684 spinlock_t reada_lock;
1685 struct radix_tree_root reada_tree;
1687 /* Extent buffer radix tree */
1688 spinlock_t buffer_lock;
1689 struct radix_tree_root buffer_radix;
1691 /* next backup root to be overwritten */
1692 int backup_root_index;
1694 int num_tolerated_disk_barrier_failures;
1696 /* device replace state */
1697 struct btrfs_dev_replace dev_replace;
1699 atomic_t mutually_exclusive_operation_running;
1701 struct percpu_counter bio_counter;
1702 wait_queue_head_t replace_wait;
1704 struct semaphore uuid_tree_rescan_sem;
1705 unsigned int update_uuid_tree_gen:1;
1707 /* Used to reclaim the metadata space in the background. */
1708 struct work_struct async_reclaim_work;
1711 struct btrfs_subvolume_writers {
1712 struct percpu_counter counter;
1713 wait_queue_head_t wait;
1717 * The state of btrfs root
1720 * btrfs_record_root_in_trans is a multi-step process,
1721 * and it can race with the balancing code. But the
1722 * race is very small, and only the first time the root
1723 * is added to each transaction. So IN_TRANS_SETUP
1724 * is used to tell us when more checks are required
1726 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1727 #define BTRFS_ROOT_REF_COWS 1
1728 #define BTRFS_ROOT_TRACK_DIRTY 2
1729 #define BTRFS_ROOT_IN_RADIX 3
1730 #define BTRFS_ROOT_DUMMY_ROOT 4
1731 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1732 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1733 #define BTRFS_ROOT_FORCE_COW 7
1734 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1737 * in ram representation of the tree. extent_root is used for all allocations
1738 * and for the extent tree extent_root root.
1741 struct extent_buffer *node;
1743 struct extent_buffer *commit_root;
1744 struct btrfs_root *log_root;
1745 struct btrfs_root *reloc_root;
1747 unsigned long state;
1748 struct btrfs_root_item root_item;
1749 struct btrfs_key root_key;
1750 struct btrfs_fs_info *fs_info;
1751 struct extent_io_tree dirty_log_pages;
1753 struct kobject root_kobj;
1754 struct completion kobj_unregister;
1755 struct mutex objectid_mutex;
1757 spinlock_t accounting_lock;
1758 struct btrfs_block_rsv *block_rsv;
1760 /* free ino cache stuff */
1761 struct btrfs_free_space_ctl *free_ino_ctl;
1762 enum btrfs_caching_type cached;
1763 spinlock_t cache_lock;
1764 wait_queue_head_t cache_wait;
1765 struct btrfs_free_space_ctl *free_ino_pinned;
1767 struct inode *cache_inode;
1769 struct mutex log_mutex;
1770 wait_queue_head_t log_writer_wait;
1771 wait_queue_head_t log_commit_wait[2];
1772 struct list_head log_ctxs[2];
1773 atomic_t log_writers;
1774 atomic_t log_commit[2];
1777 /* No matter the commit succeeds or not*/
1778 int log_transid_committed;
1779 /* Just be updated when the commit succeeds. */
1780 int last_log_commit;
1781 pid_t log_start_pid;
1786 /* data allocations are done in sectorsize units */
1789 /* node allocations are done in nodesize units */
1792 /* leaf allocations are done in leafsize units */
1799 u64 highest_objectid;
1801 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1805 u64 defrag_trans_start;
1806 struct btrfs_key defrag_progress;
1807 struct btrfs_key defrag_max;
1810 /* the dirty list is only used by non-reference counted roots */
1811 struct list_head dirty_list;
1813 struct list_head root_list;
1815 spinlock_t log_extents_lock[2];
1816 struct list_head logged_list[2];
1818 spinlock_t orphan_lock;
1819 atomic_t orphan_inodes;
1820 struct btrfs_block_rsv *orphan_block_rsv;
1821 int orphan_cleanup_state;
1823 spinlock_t inode_lock;
1824 /* red-black tree that keeps track of in-memory inodes */
1825 struct rb_root inode_tree;
1828 * radix tree that keeps track of delayed nodes of every inode,
1829 * protected by inode_lock
1831 struct radix_tree_root delayed_nodes_tree;
1833 * right now this just gets used so that a root has its own devid
1834 * for stat. It may be used for more later
1838 spinlock_t root_item_lock;
1841 struct mutex delalloc_mutex;
1842 spinlock_t delalloc_lock;
1844 * all of the inodes that have delalloc bytes. It is possible for
1845 * this list to be empty even when there is still dirty data=ordered
1846 * extents waiting to finish IO.
1848 struct list_head delalloc_inodes;
1849 struct list_head delalloc_root;
1850 u64 nr_delalloc_inodes;
1852 struct mutex ordered_extent_mutex;
1854 * this is used by the balancing code to wait for all the pending
1857 spinlock_t ordered_extent_lock;
1860 * all of the data=ordered extents pending writeback
1861 * these can span multiple transactions and basically include
1862 * every dirty data page that isn't from nodatacow
1864 struct list_head ordered_extents;
1865 struct list_head ordered_root;
1866 u64 nr_ordered_extents;
1869 * Number of currently running SEND ioctls to prevent
1870 * manipulation with the read-only status via SUBVOL_SETFLAGS
1872 int send_in_progress;
1873 struct btrfs_subvolume_writers *subv_writers;
1874 atomic_t will_be_snapshoted;
1877 struct btrfs_ioctl_defrag_range_args {
1878 /* start of the defrag operation */
1881 /* number of bytes to defrag, use (u64)-1 to say all */
1885 * flags for the operation, which can include turning
1886 * on compression for this one defrag
1891 * any extent bigger than this will be considered
1892 * already defragged. Use 0 to take the kernel default
1893 * Use 1 to say every single extent must be rewritten
1895 __u32 extent_thresh;
1898 * which compression method to use if turning on compression
1899 * for this defrag operation. If unspecified, zlib will
1902 __u32 compress_type;
1904 /* spare for later */
1910 * inode items have the data typically returned from stat and store other
1911 * info about object characteristics. There is one for every file and dir in
1914 #define BTRFS_INODE_ITEM_KEY 1
1915 #define BTRFS_INODE_REF_KEY 12
1916 #define BTRFS_INODE_EXTREF_KEY 13
1917 #define BTRFS_XATTR_ITEM_KEY 24
1918 #define BTRFS_ORPHAN_ITEM_KEY 48
1919 /* reserve 2-15 close to the inode for later flexibility */
1922 * dir items are the name -> inode pointers in a directory. There is one
1923 * for every name in a directory.
1925 #define BTRFS_DIR_LOG_ITEM_KEY 60
1926 #define BTRFS_DIR_LOG_INDEX_KEY 72
1927 #define BTRFS_DIR_ITEM_KEY 84
1928 #define BTRFS_DIR_INDEX_KEY 96
1930 * extent data is for file data
1932 #define BTRFS_EXTENT_DATA_KEY 108
1935 * extent csums are stored in a separate tree and hold csums for
1936 * an entire extent on disk.
1938 #define BTRFS_EXTENT_CSUM_KEY 128
1941 * root items point to tree roots. They are typically in the root
1942 * tree used by the super block to find all the other trees
1944 #define BTRFS_ROOT_ITEM_KEY 132
1947 * root backrefs tie subvols and snapshots to the directory entries that
1950 #define BTRFS_ROOT_BACKREF_KEY 144
1953 * root refs make a fast index for listing all of the snapshots and
1954 * subvolumes referenced by a given root. They point directly to the
1955 * directory item in the root that references the subvol
1957 #define BTRFS_ROOT_REF_KEY 156
1960 * extent items are in the extent map tree. These record which blocks
1961 * are used, and how many references there are to each block
1963 #define BTRFS_EXTENT_ITEM_KEY 168
1966 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1967 * the length, so we save the level in key->offset instead of the length.
1969 #define BTRFS_METADATA_ITEM_KEY 169
1971 #define BTRFS_TREE_BLOCK_REF_KEY 176
1973 #define BTRFS_EXTENT_DATA_REF_KEY 178
1975 #define BTRFS_EXTENT_REF_V0_KEY 180
1977 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1979 #define BTRFS_SHARED_DATA_REF_KEY 184
1982 * block groups give us hints into the extent allocation trees. Which
1983 * blocks are free etc etc
1985 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1987 #define BTRFS_DEV_EXTENT_KEY 204
1988 #define BTRFS_DEV_ITEM_KEY 216
1989 #define BTRFS_CHUNK_ITEM_KEY 228
1992 * Records the overall state of the qgroups.
1993 * There's only one instance of this key present,
1994 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1996 #define BTRFS_QGROUP_STATUS_KEY 240
1998 * Records the currently used space of the qgroup.
1999 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2001 #define BTRFS_QGROUP_INFO_KEY 242
2003 * Contains the user configured limits for the qgroup.
2004 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2006 #define BTRFS_QGROUP_LIMIT_KEY 244
2008 * Records the child-parent relationship of qgroups. For
2009 * each relation, 2 keys are present:
2010 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2011 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2013 #define BTRFS_QGROUP_RELATION_KEY 246
2015 #define BTRFS_BALANCE_ITEM_KEY 248
2018 * Persistantly stores the io stats in the device tree.
2019 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
2021 #define BTRFS_DEV_STATS_KEY 249
2024 * Persistantly stores the device replace state in the device tree.
2025 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2027 #define BTRFS_DEV_REPLACE_KEY 250
2030 * Stores items that allow to quickly map UUIDs to something else.
2031 * These items are part of the filesystem UUID tree.
2032 * The key is built like this:
2033 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2035 #if BTRFS_UUID_SIZE != 16
2036 #error "UUID items require BTRFS_UUID_SIZE == 16!"
2038 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2039 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2040 * received subvols */
2043 * string items are for debugging. They just store a short string of
2046 #define BTRFS_STRING_ITEM_KEY 253
2049 * Flags for mount options.
2051 * Note: don't forget to add new options to btrfs_show_options()
2053 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2054 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2055 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2056 #define BTRFS_MOUNT_SSD (1 << 3)
2057 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2058 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2059 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2060 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2061 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2062 #define BTRFS_MOUNT_NOSSD (1 << 9)
2063 #define BTRFS_MOUNT_DISCARD (1 << 10)
2064 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2065 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2066 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2067 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2068 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2069 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2070 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2071 #define BTRFS_MOUNT_RECOVERY (1 << 18)
2072 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2073 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2074 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2075 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2076 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2077 #define BTRFS_MOUNT_CHANGE_INODE_CACHE (1 << 24)
2079 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2081 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2082 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2083 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2084 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2086 #define btrfs_set_and_info(root, opt, fmt, args...) \
2088 if (!btrfs_test_opt(root, opt)) \
2089 btrfs_info(root->fs_info, fmt, ##args); \
2090 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2093 #define btrfs_clear_and_info(root, opt, fmt, args...) \
2095 if (btrfs_test_opt(root, opt)) \
2096 btrfs_info(root->fs_info, fmt, ##args); \
2097 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2103 #define BTRFS_INODE_NODATASUM (1 << 0)
2104 #define BTRFS_INODE_NODATACOW (1 << 1)
2105 #define BTRFS_INODE_READONLY (1 << 2)
2106 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2107 #define BTRFS_INODE_PREALLOC (1 << 4)
2108 #define BTRFS_INODE_SYNC (1 << 5)
2109 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2110 #define BTRFS_INODE_APPEND (1 << 7)
2111 #define BTRFS_INODE_NODUMP (1 << 8)
2112 #define BTRFS_INODE_NOATIME (1 << 9)
2113 #define BTRFS_INODE_DIRSYNC (1 << 10)
2114 #define BTRFS_INODE_COMPRESS (1 << 11)
2116 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2118 struct btrfs_map_token {
2119 struct extent_buffer *eb;
2121 unsigned long offset;
2124 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2126 token->kaddr = NULL;
2129 /* some macros to generate set/get funcs for the struct fields. This
2130 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2133 #define le8_to_cpu(v) (v)
2134 #define cpu_to_le8(v) (v)
2137 #define read_eb_member(eb, ptr, type, member, result) ( \
2138 read_extent_buffer(eb, (char *)(result), \
2139 ((unsigned long)(ptr)) + \
2140 offsetof(type, member), \
2141 sizeof(((type *)0)->member)))
2143 #define write_eb_member(eb, ptr, type, member, result) ( \
2144 write_extent_buffer(eb, (char *)(result), \
2145 ((unsigned long)(ptr)) + \
2146 offsetof(type, member), \
2147 sizeof(((type *)0)->member)))
2149 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2150 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2151 unsigned long off, \
2152 struct btrfs_map_token *token); \
2153 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2154 unsigned long off, u##bits val, \
2155 struct btrfs_map_token *token); \
2156 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2157 unsigned long off) \
2159 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2161 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2162 unsigned long off, u##bits val) \
2164 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2167 DECLARE_BTRFS_SETGET_BITS(8)
2168 DECLARE_BTRFS_SETGET_BITS(16)
2169 DECLARE_BTRFS_SETGET_BITS(32)
2170 DECLARE_BTRFS_SETGET_BITS(64)
2172 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2173 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2175 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2176 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2178 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2181 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2182 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2184 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2185 struct btrfs_map_token *token) \
2187 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2188 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2190 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2191 type *s, u##bits val, \
2192 struct btrfs_map_token *token) \
2194 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2195 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2198 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2199 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2201 type *p = page_address(eb->pages[0]); \
2202 u##bits res = le##bits##_to_cpu(p->member); \
2205 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2208 type *p = page_address(eb->pages[0]); \
2209 p->member = cpu_to_le##bits(val); \
2212 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2213 static inline u##bits btrfs_##name(type *s) \
2215 return le##bits##_to_cpu(s->member); \
2217 static inline void btrfs_set_##name(type *s, u##bits val) \
2219 s->member = cpu_to_le##bits(val); \
2222 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2223 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2224 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2225 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2226 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2227 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2229 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2230 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2231 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2232 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2233 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2234 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2236 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2237 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2239 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2241 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2243 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2245 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2247 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2248 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2250 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2252 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2254 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2257 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2259 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2262 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
2264 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
2267 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2268 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2269 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2270 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2271 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2272 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2273 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2274 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2275 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2276 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2277 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2279 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2281 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2284 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2285 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2286 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2288 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2290 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2292 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2294 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2295 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2297 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2299 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2300 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2302 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2305 unsigned long offset = (unsigned long)c;
2306 offset += offsetof(struct btrfs_chunk, stripe);
2307 offset += nr * sizeof(struct btrfs_stripe);
2308 return (struct btrfs_stripe *)offset;
2311 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2313 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2316 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2317 struct btrfs_chunk *c, int nr)
2319 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2322 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2323 struct btrfs_chunk *c, int nr)
2325 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2328 /* struct btrfs_block_group_item */
2329 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2331 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2333 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2334 struct btrfs_block_group_item, chunk_objectid, 64);
2336 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2337 struct btrfs_block_group_item, chunk_objectid, 64);
2338 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2339 struct btrfs_block_group_item, flags, 64);
2340 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2341 struct btrfs_block_group_item, flags, 64);
2343 /* struct btrfs_inode_ref */
2344 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2345 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2347 /* struct btrfs_inode_extref */
2348 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2349 parent_objectid, 64);
2350 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2352 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2354 /* struct btrfs_inode_item */
2355 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2356 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2357 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2358 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2359 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2360 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2361 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2362 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2363 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2364 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2365 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2366 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2367 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2369 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2371 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2373 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2374 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2376 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2378 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2379 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2380 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2381 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2382 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2383 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
2385 static inline struct btrfs_timespec *
2386 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
2388 unsigned long ptr = (unsigned long)inode_item;
2389 ptr += offsetof(struct btrfs_inode_item, atime);
2390 return (struct btrfs_timespec *)ptr;
2393 static inline struct btrfs_timespec *
2394 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
2396 unsigned long ptr = (unsigned long)inode_item;
2397 ptr += offsetof(struct btrfs_inode_item, mtime);
2398 return (struct btrfs_timespec *)ptr;
2401 static inline struct btrfs_timespec *
2402 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
2404 unsigned long ptr = (unsigned long)inode_item;
2405 ptr += offsetof(struct btrfs_inode_item, ctime);
2406 return (struct btrfs_timespec *)ptr;
2409 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2410 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2411 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2412 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
2414 /* struct btrfs_dev_extent */
2415 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2417 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2418 chunk_objectid, 64);
2419 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2421 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2423 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2425 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2426 return (unsigned long)dev + ptr;
2429 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2430 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2432 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2434 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2437 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2439 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2440 struct btrfs_tree_block_info *item,
2441 struct btrfs_disk_key *key)
2443 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2446 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2447 struct btrfs_tree_block_info *item,
2448 struct btrfs_disk_key *key)
2450 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2453 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2455 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2457 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2459 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2462 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2465 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2467 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2470 static inline u32 btrfs_extent_inline_ref_size(int type)
2472 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2473 type == BTRFS_SHARED_BLOCK_REF_KEY)
2474 return sizeof(struct btrfs_extent_inline_ref);
2475 if (type == BTRFS_SHARED_DATA_REF_KEY)
2476 return sizeof(struct btrfs_shared_data_ref) +
2477 sizeof(struct btrfs_extent_inline_ref);
2478 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2479 return sizeof(struct btrfs_extent_data_ref) +
2480 offsetof(struct btrfs_extent_inline_ref, offset);
2485 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2486 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2488 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2489 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2491 /* struct btrfs_node */
2492 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2493 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2494 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2496 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2499 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2502 ptr = offsetof(struct btrfs_node, ptrs) +
2503 sizeof(struct btrfs_key_ptr) * nr;
2504 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2507 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2511 ptr = offsetof(struct btrfs_node, ptrs) +
2512 sizeof(struct btrfs_key_ptr) * nr;
2513 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2516 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2519 ptr = offsetof(struct btrfs_node, ptrs) +
2520 sizeof(struct btrfs_key_ptr) * nr;
2521 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2524 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2528 ptr = offsetof(struct btrfs_node, ptrs) +
2529 sizeof(struct btrfs_key_ptr) * nr;
2530 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2533 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2535 return offsetof(struct btrfs_node, ptrs) +
2536 sizeof(struct btrfs_key_ptr) * nr;
2539 void btrfs_node_key(struct extent_buffer *eb,
2540 struct btrfs_disk_key *disk_key, int nr);
2542 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2543 struct btrfs_disk_key *disk_key, int nr)
2546 ptr = btrfs_node_key_ptr_offset(nr);
2547 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2548 struct btrfs_key_ptr, key, disk_key);
2551 /* struct btrfs_item */
2552 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2553 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2554 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2555 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2557 static inline unsigned long btrfs_item_nr_offset(int nr)
2559 return offsetof(struct btrfs_leaf, items) +
2560 sizeof(struct btrfs_item) * nr;
2563 static inline struct btrfs_item *btrfs_item_nr(int nr)
2565 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2568 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2569 struct btrfs_item *item)
2571 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2574 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2576 return btrfs_item_end(eb, btrfs_item_nr(nr));
2579 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2581 return btrfs_item_offset(eb, btrfs_item_nr(nr));
2584 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2586 return btrfs_item_size(eb, btrfs_item_nr(nr));
2589 static inline void btrfs_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 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2596 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2597 struct btrfs_disk_key *disk_key, int nr)
2599 struct btrfs_item *item = btrfs_item_nr(nr);
2600 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2603 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2606 * struct btrfs_root_ref
2608 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2609 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2610 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2612 /* struct btrfs_dir_item */
2613 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2614 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2615 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2616 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2617 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2618 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2620 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2622 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2625 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2626 struct btrfs_dir_item *item,
2627 struct btrfs_disk_key *key)
2629 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2632 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2633 struct btrfs_dir_item *item,
2634 struct btrfs_disk_key *key)
2636 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2639 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2641 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2643 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2646 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2647 struct btrfs_free_space_header *h,
2648 struct btrfs_disk_key *key)
2650 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2653 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2654 struct btrfs_free_space_header *h,
2655 struct btrfs_disk_key *key)
2657 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2660 /* struct btrfs_disk_key */
2661 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2663 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2664 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2666 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2667 struct btrfs_disk_key *disk)
2669 cpu->offset = le64_to_cpu(disk->offset);
2670 cpu->type = disk->type;
2671 cpu->objectid = le64_to_cpu(disk->objectid);
2674 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2675 struct btrfs_key *cpu)
2677 disk->offset = cpu_to_le64(cpu->offset);
2678 disk->type = cpu->type;
2679 disk->objectid = cpu_to_le64(cpu->objectid);
2682 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2683 struct btrfs_key *key, int nr)
2685 struct btrfs_disk_key disk_key;
2686 btrfs_node_key(eb, &disk_key, nr);
2687 btrfs_disk_key_to_cpu(key, &disk_key);
2690 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2691 struct btrfs_key *key, int nr)
2693 struct btrfs_disk_key disk_key;
2694 btrfs_item_key(eb, &disk_key, nr);
2695 btrfs_disk_key_to_cpu(key, &disk_key);
2698 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2699 struct btrfs_dir_item *item,
2700 struct btrfs_key *key)
2702 struct btrfs_disk_key disk_key;
2703 btrfs_dir_item_key(eb, item, &disk_key);
2704 btrfs_disk_key_to_cpu(key, &disk_key);
2708 static inline u8 btrfs_key_type(struct btrfs_key *key)
2713 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2718 /* struct btrfs_header */
2719 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2720 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2722 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2723 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2724 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2725 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2726 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2728 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2729 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2731 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2733 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2735 return (btrfs_header_flags(eb) & flag) == flag;
2738 static inline int btrfs_set_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_clear_header_flag(struct extent_buffer *eb, u64 flag)
2747 u64 flags = btrfs_header_flags(eb);
2748 btrfs_set_header_flags(eb, flags & ~flag);
2749 return (flags & flag) == flag;
2752 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2754 u64 flags = btrfs_header_flags(eb);
2755 return flags >> BTRFS_BACKREF_REV_SHIFT;
2758 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2761 u64 flags = btrfs_header_flags(eb);
2762 flags &= ~BTRFS_BACKREF_REV_MASK;
2763 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2764 btrfs_set_header_flags(eb, flags);
2767 static inline unsigned long btrfs_header_fsid(void)
2769 return offsetof(struct btrfs_header, fsid);
2772 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2774 return offsetof(struct btrfs_header, chunk_tree_uuid);
2777 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2779 return btrfs_header_level(eb) == 0;
2782 /* struct btrfs_root_item */
2783 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2785 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2786 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2787 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2789 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2791 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2792 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2793 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2794 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2795 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2796 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2797 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2798 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2800 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2802 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2804 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2806 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2808 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2811 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2813 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2816 static inline bool btrfs_root_dead(struct btrfs_root *root)
2818 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2821 /* struct btrfs_root_backup */
2822 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2824 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2826 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2827 tree_root_level, 8);
2829 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2831 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2832 chunk_root_gen, 64);
2833 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2834 chunk_root_level, 8);
2836 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2838 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2839 extent_root_gen, 64);
2840 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2841 extent_root_level, 8);
2843 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2845 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2847 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2850 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2852 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2854 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2857 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2859 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2861 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2862 csum_root_level, 8);
2863 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2865 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2867 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2870 /* struct btrfs_balance_item */
2871 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2873 static inline void btrfs_balance_data(struct extent_buffer *eb,
2874 struct btrfs_balance_item *bi,
2875 struct btrfs_disk_balance_args *ba)
2877 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2880 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2881 struct btrfs_balance_item *bi,
2882 struct btrfs_disk_balance_args *ba)
2884 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2887 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2888 struct btrfs_balance_item *bi,
2889 struct btrfs_disk_balance_args *ba)
2891 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2894 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2895 struct btrfs_balance_item *bi,
2896 struct btrfs_disk_balance_args *ba)
2898 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2901 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2902 struct btrfs_balance_item *bi,
2903 struct btrfs_disk_balance_args *ba)
2905 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2908 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2909 struct btrfs_balance_item *bi,
2910 struct btrfs_disk_balance_args *ba)
2912 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2916 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2917 struct btrfs_disk_balance_args *disk)
2919 memset(cpu, 0, sizeof(*cpu));
2921 cpu->profiles = le64_to_cpu(disk->profiles);
2922 cpu->usage = le64_to_cpu(disk->usage);
2923 cpu->devid = le64_to_cpu(disk->devid);
2924 cpu->pstart = le64_to_cpu(disk->pstart);
2925 cpu->pend = le64_to_cpu(disk->pend);
2926 cpu->vstart = le64_to_cpu(disk->vstart);
2927 cpu->vend = le64_to_cpu(disk->vend);
2928 cpu->target = le64_to_cpu(disk->target);
2929 cpu->flags = le64_to_cpu(disk->flags);
2930 cpu->limit = le64_to_cpu(disk->limit);
2934 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2935 struct btrfs_balance_args *cpu)
2937 memset(disk, 0, sizeof(*disk));
2939 disk->profiles = cpu_to_le64(cpu->profiles);
2940 disk->usage = cpu_to_le64(cpu->usage);
2941 disk->devid = cpu_to_le64(cpu->devid);
2942 disk->pstart = cpu_to_le64(cpu->pstart);
2943 disk->pend = cpu_to_le64(cpu->pend);
2944 disk->vstart = cpu_to_le64(cpu->vstart);
2945 disk->vend = cpu_to_le64(cpu->vend);
2946 disk->target = cpu_to_le64(cpu->target);
2947 disk->flags = cpu_to_le64(cpu->flags);
2948 disk->limit = cpu_to_le64(cpu->limit);
2951 /* struct btrfs_super_block */
2952 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2953 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2954 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2956 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2957 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2958 struct btrfs_super_block, sys_chunk_array_size, 32);
2959 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2960 struct btrfs_super_block, chunk_root_generation, 64);
2961 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2963 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2965 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2966 chunk_root_level, 8);
2967 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2969 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2970 log_root_transid, 64);
2971 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2973 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2975 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2977 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2979 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2981 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2983 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2985 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2986 root_dir_objectid, 64);
2987 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2989 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2991 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2992 compat_ro_flags, 64);
2993 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2994 incompat_flags, 64);
2995 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2997 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2998 cache_generation, 64);
2999 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
3000 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
3001 uuid_tree_generation, 64);
3003 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
3005 u16 t = btrfs_super_csum_type(s);
3007 * csum type is validated at mount time
3009 return btrfs_csum_sizes[t];
3012 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
3014 return offsetof(struct btrfs_leaf, items);
3017 /* struct btrfs_file_extent_item */
3018 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
3019 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
3020 struct btrfs_file_extent_item, disk_bytenr, 64);
3021 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
3022 struct btrfs_file_extent_item, offset, 64);
3023 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
3024 struct btrfs_file_extent_item, generation, 64);
3025 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
3026 struct btrfs_file_extent_item, num_bytes, 64);
3027 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
3028 struct btrfs_file_extent_item, disk_num_bytes, 64);
3029 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
3030 struct btrfs_file_extent_item, compression, 8);
3032 static inline unsigned long
3033 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
3035 unsigned long offset = (unsigned long)e;
3036 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
3040 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
3042 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
3045 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
3047 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
3049 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
3050 disk_num_bytes, 64);
3051 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
3053 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
3055 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
3057 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
3059 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
3061 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
3062 other_encoding, 16);
3065 * this returns the number of bytes used by the item on disk, minus the
3066 * size of any extent headers. If a file is compressed on disk, this is
3067 * the compressed size
3069 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
3070 struct btrfs_item *e)
3072 unsigned long offset;
3073 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
3074 return btrfs_item_size(eb, e) - offset;
3077 /* this returns the number of file bytes represented by the inline item.
3078 * If an item is compressed, this is the uncompressed size
3080 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3082 struct btrfs_file_extent_item *fi)
3084 struct btrfs_map_token token;
3086 btrfs_init_map_token(&token);
3088 * return the space used on disk if this item isn't
3089 * compressed or encoded
3091 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3092 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3093 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3094 return btrfs_file_extent_inline_item_len(eb,
3095 btrfs_item_nr(slot));
3098 /* otherwise use the ram bytes field */
3099 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3103 /* btrfs_dev_stats_item */
3104 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3105 struct btrfs_dev_stats_item *ptr,
3110 read_extent_buffer(eb, &val,
3111 offsetof(struct btrfs_dev_stats_item, values) +
3112 ((unsigned long)ptr) + (index * sizeof(u64)),
3117 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3118 struct btrfs_dev_stats_item *ptr,
3121 write_extent_buffer(eb, &val,
3122 offsetof(struct btrfs_dev_stats_item, values) +
3123 ((unsigned long)ptr) + (index * sizeof(u64)),
3127 /* btrfs_qgroup_status_item */
3128 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3130 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3132 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3134 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3137 /* btrfs_qgroup_info_item */
3138 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3140 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3141 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3143 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3144 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3147 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3148 struct btrfs_qgroup_info_item, generation, 64);
3149 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3151 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3152 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3153 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3155 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3156 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3158 /* btrfs_qgroup_limit_item */
3159 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3161 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3163 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3165 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3167 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3170 /* btrfs_dev_replace_item */
3171 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3172 struct btrfs_dev_replace_item, src_devid, 64);
3173 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3174 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3176 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3178 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3180 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3182 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3183 num_write_errors, 64);
3184 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3185 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3187 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3189 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3192 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3193 struct btrfs_dev_replace_item, src_devid, 64);
3194 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3195 struct btrfs_dev_replace_item,
3196 cont_reading_from_srcdev_mode, 64);
3197 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3198 struct btrfs_dev_replace_item, replace_state, 64);
3199 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3200 struct btrfs_dev_replace_item, time_started, 64);
3201 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3202 struct btrfs_dev_replace_item, time_stopped, 64);
3203 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3204 struct btrfs_dev_replace_item, num_write_errors, 64);
3205 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3206 struct btrfs_dev_replace_item,
3207 num_uncorrectable_read_errors, 64);
3208 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3209 struct btrfs_dev_replace_item, cursor_left, 64);
3210 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3211 struct btrfs_dev_replace_item, cursor_right, 64);
3213 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
3215 return sb->s_fs_info;
3218 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
3221 return root->leafsize;
3222 return root->nodesize;
3225 /* helper function to cast into the data area of the leaf. */
3226 #define btrfs_item_ptr(leaf, slot, type) \
3227 ((type *)(btrfs_leaf_data(leaf) + \
3228 btrfs_item_offset_nr(leaf, slot)))
3230 #define btrfs_item_ptr_offset(leaf, slot) \
3231 ((unsigned long)(btrfs_leaf_data(leaf) + \
3232 btrfs_item_offset_nr(leaf, slot)))
3234 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3236 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3237 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3240 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3242 return mapping_gfp_mask(mapping) & ~__GFP_FS;
3246 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3249 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3254 * Doing a truncate won't result in new nodes or leaves, just what we need for
3257 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3260 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3264 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3265 struct btrfs_root *root);
3266 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3267 struct btrfs_root *root);
3268 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3269 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3270 struct btrfs_root *root, unsigned long count);
3271 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
3272 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3273 struct btrfs_root *root, u64 bytenr,
3274 u64 offset, int metadata, u64 *refs, u64 *flags);
3275 int btrfs_pin_extent(struct btrfs_root *root,
3276 u64 bytenr, u64 num, int reserved);
3277 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3278 u64 bytenr, u64 num_bytes);
3279 int btrfs_exclude_logged_extents(struct btrfs_root *root,
3280 struct extent_buffer *eb);
3281 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3282 struct btrfs_root *root,
3283 u64 objectid, u64 offset, u64 bytenr);
3284 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3285 struct btrfs_fs_info *info,
3287 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3288 int get_block_group_index(struct btrfs_block_group_cache *cache);
3289 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
3290 struct btrfs_root *root, u32 blocksize,
3291 u64 parent, u64 root_objectid,
3292 struct btrfs_disk_key *key, int level,
3293 u64 hint, u64 empty_size);
3294 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3295 struct btrfs_root *root,
3296 struct extent_buffer *buf,
3297 u64 parent, int last_ref);
3298 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3299 struct btrfs_root *root,
3300 u64 root_objectid, u64 owner,
3301 u64 offset, struct btrfs_key *ins);
3302 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3303 struct btrfs_root *root,
3304 u64 root_objectid, u64 owner, u64 offset,
3305 struct btrfs_key *ins);
3306 int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3307 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3308 struct btrfs_key *ins, int is_data);
3309 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3310 struct extent_buffer *buf, int full_backref, int no_quota);
3311 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3312 struct extent_buffer *buf, int full_backref, int no_quota);
3313 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3314 struct btrfs_root *root,
3315 u64 bytenr, u64 num_bytes, u64 flags,
3316 int level, int is_data);
3317 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3318 struct btrfs_root *root,
3319 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3320 u64 owner, u64 offset, int no_quota);
3322 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
3323 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3324 u64 start, u64 len);
3325 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3326 struct btrfs_root *root);
3327 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3328 struct btrfs_root *root);
3329 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3330 struct btrfs_root *root,
3331 u64 bytenr, u64 num_bytes, u64 parent,
3332 u64 root_objectid, u64 owner, u64 offset, int no_quota);
3334 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3335 struct btrfs_root *root);
3336 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3337 int btrfs_free_block_groups(struct btrfs_fs_info *info);
3338 int btrfs_read_block_groups(struct btrfs_root *root);
3339 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3340 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3341 struct btrfs_root *root, u64 bytes_used,
3342 u64 type, u64 chunk_objectid, u64 chunk_offset,
3344 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3345 struct btrfs_root *root, u64 group_start);
3346 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3347 struct btrfs_root *root);
3348 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3349 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3351 enum btrfs_reserve_flush_enum {
3352 /* If we are in the transaction, we can't flush anything.*/
3353 BTRFS_RESERVE_NO_FLUSH,
3355 * Flushing delalloc may cause deadlock somewhere, in this
3356 * case, use FLUSH LIMIT
3358 BTRFS_RESERVE_FLUSH_LIMIT,
3359 BTRFS_RESERVE_FLUSH_ALL,
3362 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
3363 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3364 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3365 struct btrfs_root *root);
3366 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3367 struct inode *inode);
3368 void btrfs_orphan_release_metadata(struct inode *inode);
3369 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3370 struct btrfs_block_rsv *rsv,
3372 u64 *qgroup_reserved, bool use_global_rsv);
3373 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3374 struct btrfs_block_rsv *rsv,
3375 u64 qgroup_reserved);
3376 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3377 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3378 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3379 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3380 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3381 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3382 unsigned short type);
3383 void btrfs_free_block_rsv(struct btrfs_root *root,
3384 struct btrfs_block_rsv *rsv);
3385 int btrfs_block_rsv_add(struct btrfs_root *root,
3386 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3387 enum btrfs_reserve_flush_enum flush);
3388 int btrfs_block_rsv_check(struct btrfs_root *root,
3389 struct btrfs_block_rsv *block_rsv, int min_factor);
3390 int btrfs_block_rsv_refill(struct btrfs_root *root,
3391 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3392 enum btrfs_reserve_flush_enum flush);
3393 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3394 struct btrfs_block_rsv *dst_rsv,
3396 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3397 struct btrfs_block_rsv *dest, u64 num_bytes,
3399 void btrfs_block_rsv_release(struct btrfs_root *root,
3400 struct btrfs_block_rsv *block_rsv,
3402 int btrfs_set_block_group_ro(struct btrfs_root *root,
3403 struct btrfs_block_group_cache *cache);
3404 void btrfs_set_block_group_rw(struct btrfs_root *root,
3405 struct btrfs_block_group_cache *cache);
3406 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3407 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3408 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3409 u64 start, u64 end);
3410 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
3411 u64 num_bytes, u64 *actual_bytes);
3412 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3413 struct btrfs_root *root, u64 type);
3414 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3416 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3417 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3418 struct btrfs_fs_info *fs_info);
3419 int __get_raid_index(u64 flags);
3420 int btrfs_start_nocow_write(struct btrfs_root *root);
3421 void btrfs_end_nocow_write(struct btrfs_root *root);
3423 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3424 int level, int *slot);
3425 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3426 int btrfs_previous_item(struct btrfs_root *root,
3427 struct btrfs_path *path, u64 min_objectid,
3429 int btrfs_previous_extent_item(struct btrfs_root *root,
3430 struct btrfs_path *path, u64 min_objectid);
3431 void btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
3432 struct btrfs_key *new_key);
3433 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3434 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3435 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3436 struct btrfs_key *key, int lowest_level,
3438 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3439 struct btrfs_path *path,
3441 enum btrfs_compare_tree_result {
3442 BTRFS_COMPARE_TREE_NEW,
3443 BTRFS_COMPARE_TREE_DELETED,
3444 BTRFS_COMPARE_TREE_CHANGED,
3445 BTRFS_COMPARE_TREE_SAME,
3447 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3448 struct btrfs_root *right_root,
3449 struct btrfs_path *left_path,
3450 struct btrfs_path *right_path,
3451 struct btrfs_key *key,
3452 enum btrfs_compare_tree_result result,
3454 int btrfs_compare_trees(struct btrfs_root *left_root,
3455 struct btrfs_root *right_root,
3456 btrfs_changed_cb_t cb, void *ctx);
3457 int btrfs_cow_block(struct btrfs_trans_handle *trans,
3458 struct btrfs_root *root, struct extent_buffer *buf,
3459 struct extent_buffer *parent, int parent_slot,
3460 struct extent_buffer **cow_ret);
3461 int btrfs_copy_root(struct btrfs_trans_handle *trans,
3462 struct btrfs_root *root,
3463 struct extent_buffer *buf,
3464 struct extent_buffer **cow_ret, u64 new_root_objectid);
3465 int btrfs_block_can_be_shared(struct btrfs_root *root,
3466 struct extent_buffer *buf);
3467 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3469 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3470 u32 new_size, int from_end);
3471 int btrfs_split_item(struct btrfs_trans_handle *trans,
3472 struct btrfs_root *root,
3473 struct btrfs_path *path,
3474 struct btrfs_key *new_key,
3475 unsigned long split_offset);
3476 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3477 struct btrfs_root *root,
3478 struct btrfs_path *path,
3479 struct btrfs_key *new_key);
3480 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
3481 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
3482 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3483 *root, struct btrfs_key *key, struct btrfs_path *p, int
3485 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3486 struct btrfs_path *p, u64 time_seq);
3487 int btrfs_search_slot_for_read(struct btrfs_root *root,
3488 struct btrfs_key *key, struct btrfs_path *p,
3489 int find_higher, int return_any);
3490 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3491 struct btrfs_root *root, struct extent_buffer *parent,
3492 int start_slot, u64 *last_ret,
3493 struct btrfs_key *progress);
3494 void btrfs_release_path(struct btrfs_path *p);
3495 struct btrfs_path *btrfs_alloc_path(void);
3496 void btrfs_free_path(struct btrfs_path *p);
3497 void btrfs_set_path_blocking(struct btrfs_path *p);
3498 void btrfs_clear_path_blocking(struct btrfs_path *p,
3499 struct extent_buffer *held, int held_rw);
3500 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3502 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3503 struct btrfs_path *path, int slot, int nr);
3504 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3505 struct btrfs_root *root,
3506 struct btrfs_path *path)
3508 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3511 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3512 struct btrfs_key *cpu_key, u32 *data_size,
3513 u32 total_data, u32 total_size, int nr);
3514 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3515 *root, struct btrfs_key *key, void *data, u32 data_size);
3516 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3517 struct btrfs_root *root,
3518 struct btrfs_path *path,
3519 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3521 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3522 struct btrfs_root *root,
3523 struct btrfs_path *path,
3524 struct btrfs_key *key,
3527 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3530 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3531 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3532 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3534 static inline int btrfs_next_old_item(struct btrfs_root *root,
3535 struct btrfs_path *p, u64 time_seq)
3538 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3539 return btrfs_next_old_leaf(root, p, time_seq);
3542 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3544 return btrfs_next_old_item(root, p, 0);
3546 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3547 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3548 struct btrfs_block_rsv *block_rsv,
3549 int update_ref, int for_reloc);
3550 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3551 struct btrfs_root *root,
3552 struct extent_buffer *node,
3553 struct extent_buffer *parent);
3554 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3557 * Get synced with close_ctree()
3560 return fs_info->closing;
3564 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3565 * anything except sleeping. This function is used to check the status of
3568 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3570 return (root->fs_info->sb->s_flags & MS_RDONLY ||
3571 btrfs_fs_closing(root->fs_info));
3574 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3576 kfree(fs_info->balance_ctl);
3577 kfree(fs_info->delayed_root);
3578 kfree(fs_info->extent_root);
3579 kfree(fs_info->tree_root);
3580 kfree(fs_info->chunk_root);
3581 kfree(fs_info->dev_root);
3582 kfree(fs_info->csum_root);
3583 kfree(fs_info->quota_root);
3584 kfree(fs_info->uuid_root);
3585 kfree(fs_info->super_copy);
3586 kfree(fs_info->super_for_commit);
3590 /* tree mod log functions from ctree.c */
3591 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3592 struct seq_list *elem);
3593 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3594 struct seq_list *elem);
3595 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3598 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3599 struct btrfs_path *path,
3600 u64 root_id, u64 ref_id);
3601 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3602 struct btrfs_root *tree_root,
3603 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3604 const char *name, int name_len);
3605 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3606 struct btrfs_root *tree_root,
3607 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3608 const char *name, int name_len);
3609 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3610 struct btrfs_key *key);
3611 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3612 *root, struct btrfs_key *key, struct btrfs_root_item
3614 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3615 struct btrfs_root *root,
3616 struct btrfs_key *key,
3617 struct btrfs_root_item *item);
3618 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3619 struct btrfs_path *path, struct btrfs_root_item *root_item,
3620 struct btrfs_key *root_key);
3621 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3622 void btrfs_set_root_node(struct btrfs_root_item *item,
3623 struct extent_buffer *node);
3624 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3625 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3626 struct btrfs_root *root);
3629 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3630 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3632 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3633 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3635 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3636 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3640 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3641 const char *name, int name_len);
3642 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3643 struct btrfs_root *root, const char *name,
3644 int name_len, struct inode *dir,
3645 struct btrfs_key *location, u8 type, u64 index);
3646 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3647 struct btrfs_root *root,
3648 struct btrfs_path *path, u64 dir,
3649 const char *name, int name_len,
3651 struct btrfs_dir_item *
3652 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3653 struct btrfs_root *root,
3654 struct btrfs_path *path, u64 dir,
3655 u64 objectid, const char *name, int name_len,
3657 struct btrfs_dir_item *
3658 btrfs_search_dir_index_item(struct btrfs_root *root,
3659 struct btrfs_path *path, u64 dirid,
3660 const char *name, int name_len);
3661 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3662 struct btrfs_root *root,
3663 struct btrfs_path *path,
3664 struct btrfs_dir_item *di);
3665 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3666 struct btrfs_root *root,
3667 struct btrfs_path *path, u64 objectid,
3668 const char *name, u16 name_len,
3669 const void *data, u16 data_len);
3670 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3671 struct btrfs_root *root,
3672 struct btrfs_path *path, u64 dir,
3673 const char *name, u16 name_len,
3675 int verify_dir_item(struct btrfs_root *root,
3676 struct extent_buffer *leaf,
3677 struct btrfs_dir_item *dir_item);
3680 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3681 struct btrfs_root *root, u64 offset);
3682 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3683 struct btrfs_root *root, u64 offset);
3684 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3687 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3688 struct btrfs_root *root,
3689 const char *name, int name_len,
3690 u64 inode_objectid, u64 ref_objectid, u64 index);
3691 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3692 struct btrfs_root *root,
3693 const char *name, int name_len,
3694 u64 inode_objectid, u64 ref_objectid, u64 *index);
3695 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3696 struct btrfs_root *root,
3697 struct btrfs_path *path, u64 objectid);
3698 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3699 *root, struct btrfs_path *path,
3700 struct btrfs_key *location, int mod);
3702 struct btrfs_inode_extref *
3703 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3704 struct btrfs_root *root,
3705 struct btrfs_path *path,
3706 const char *name, int name_len,
3707 u64 inode_objectid, u64 ref_objectid, int ins_len,
3710 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3711 u64 ref_objectid, const char *name,
3713 struct btrfs_inode_extref **extref_ret);
3716 struct btrfs_dio_private;
3717 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3718 struct btrfs_root *root, u64 bytenr, u64 len);
3719 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3720 struct bio *bio, u32 *dst);
3721 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3722 struct btrfs_dio_private *dip, struct bio *bio,
3723 u64 logical_offset);
3724 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3725 struct btrfs_root *root,
3726 u64 objectid, u64 pos,
3727 u64 disk_offset, u64 disk_num_bytes,
3728 u64 num_bytes, u64 offset, u64 ram_bytes,
3729 u8 compression, u8 encryption, u16 other_encoding);
3730 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3731 struct btrfs_root *root,
3732 struct btrfs_path *path, u64 objectid,
3733 u64 bytenr, int mod);
3734 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3735 struct btrfs_root *root,
3736 struct btrfs_ordered_sum *sums);
3737 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3738 struct bio *bio, u64 file_start, int contig);
3739 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3740 struct list_head *list, int search_commit);
3742 struct btrfs_delalloc_work {
3743 struct inode *inode;
3746 struct completion completion;
3747 struct list_head list;
3748 struct btrfs_work work;
3751 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3752 int wait, int delay_iput);
3753 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3755 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3756 size_t pg_offset, u64 start, u64 len,
3758 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3759 u64 *orig_start, u64 *orig_block_len,
3762 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3763 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3764 #define ClearPageChecked ClearPageFsMisc
3765 #define SetPageChecked SetPageFsMisc
3766 #define PageChecked PageFsMisc
3769 /* This forces readahead on a given range of bytes in an inode */
3770 static inline void btrfs_force_ra(struct address_space *mapping,
3771 struct file_ra_state *ra, struct file *file,
3772 pgoff_t offset, unsigned long req_size)
3774 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3777 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3778 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3779 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3780 struct btrfs_root *root,
3781 struct inode *dir, struct inode *inode,
3782 const char *name, int name_len);
3783 int btrfs_add_link(struct btrfs_trans_handle *trans,
3784 struct inode *parent_inode, struct inode *inode,
3785 const char *name, int name_len, int add_backref, u64 index);
3786 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3787 struct btrfs_root *root,
3788 struct inode *dir, u64 objectid,
3789 const char *name, int name_len);
3790 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3792 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3793 struct btrfs_root *root,
3794 struct inode *inode, u64 new_size,
3797 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3798 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3800 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3801 struct extent_state **cached_state);
3802 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3803 struct btrfs_root *new_root,
3804 struct btrfs_root *parent_root,
3806 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3807 size_t size, struct bio *bio,
3808 unsigned long bio_flags);
3809 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3810 int btrfs_readpage(struct file *file, struct page *page);
3811 void btrfs_evict_inode(struct inode *inode);
3812 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3813 struct inode *btrfs_alloc_inode(struct super_block *sb);
3814 void btrfs_destroy_inode(struct inode *inode);
3815 int btrfs_drop_inode(struct inode *inode);
3816 int btrfs_init_cachep(void);
3817 void btrfs_destroy_cachep(void);
3818 long btrfs_ioctl_trans_end(struct file *file);
3819 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3820 struct btrfs_root *root, int *was_new);
3821 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3822 size_t pg_offset, u64 start, u64 end,
3824 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3825 struct btrfs_root *root,
3826 struct inode *inode);
3827 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3828 struct btrfs_root *root, struct inode *inode);
3829 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3830 int btrfs_orphan_cleanup(struct btrfs_root *root);
3831 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3832 struct btrfs_root *root);
3833 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3834 void btrfs_invalidate_inodes(struct btrfs_root *root);
3835 void btrfs_add_delayed_iput(struct inode *inode);
3836 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3837 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3838 u64 start, u64 num_bytes, u64 min_size,
3839 loff_t actual_len, u64 *alloc_hint);
3840 int btrfs_prealloc_file_range_trans(struct inode *inode,
3841 struct btrfs_trans_handle *trans, int mode,
3842 u64 start, u64 num_bytes, u64 min_size,
3843 loff_t actual_len, u64 *alloc_hint);
3844 extern const struct dentry_operations btrfs_dentry_operations;
3847 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3848 void btrfs_update_iflags(struct inode *inode);
3849 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3850 int btrfs_is_empty_uuid(u8 *uuid);
3851 int btrfs_defrag_file(struct inode *inode, struct file *file,
3852 struct btrfs_ioctl_defrag_range_args *range,
3853 u64 newer_than, unsigned long max_pages);
3854 void btrfs_get_block_group_info(struct list_head *groups_list,
3855 struct btrfs_ioctl_space_info *space);
3856 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3857 struct btrfs_ioctl_balance_args *bargs);
3861 int btrfs_auto_defrag_init(void);
3862 void btrfs_auto_defrag_exit(void);
3863 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3864 struct inode *inode);
3865 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3866 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3867 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3868 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3870 extern const struct file_operations btrfs_file_operations;
3871 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3872 struct btrfs_root *root, struct inode *inode,
3873 struct btrfs_path *path, u64 start, u64 end,
3874 u64 *drop_end, int drop_cache,
3876 u32 extent_item_size,
3878 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3879 struct btrfs_root *root, struct inode *inode, u64 start,
3880 u64 end, int drop_cache);
3881 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3882 struct inode *inode, u64 start, u64 end);
3883 int btrfs_release_file(struct inode *inode, struct file *file);
3884 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3885 struct page **pages, size_t num_pages,
3886 loff_t pos, size_t write_bytes,
3887 struct extent_state **cached);
3890 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3891 struct btrfs_root *root);
3894 int btrfs_init_sysfs(void);
3895 void btrfs_exit_sysfs(void);
3896 int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info);
3897 void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info);
3900 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3903 int btrfs_parse_options(struct btrfs_root *root, char *options);
3904 int btrfs_sync_fs(struct super_block *sb, int wait);
3906 #ifdef CONFIG_PRINTK
3908 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3910 static inline __printf(2, 3)
3911 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3916 #define btrfs_emerg(fs_info, fmt, args...) \
3917 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3918 #define btrfs_alert(fs_info, fmt, args...) \
3919 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3920 #define btrfs_crit(fs_info, fmt, args...) \
3921 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3922 #define btrfs_err(fs_info, fmt, args...) \
3923 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3924 #define btrfs_warn(fs_info, fmt, args...) \
3925 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3926 #define btrfs_notice(fs_info, fmt, args...) \
3927 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3928 #define btrfs_info(fs_info, fmt, args...) \
3929 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3932 #define btrfs_debug(fs_info, fmt, args...) \
3933 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3935 #define btrfs_debug(fs_info, fmt, args...) \
3936 no_printk(KERN_DEBUG fmt, ##args)
3939 #ifdef CONFIG_BTRFS_ASSERT
3941 static inline void assfail(char *expr, char *file, int line)
3943 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3948 #define ASSERT(expr) \
3949 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3951 #define ASSERT(expr) ((void)0)
3954 #define btrfs_assert()
3956 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3957 unsigned int line, int errno, const char *fmt, ...);
3960 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3961 struct btrfs_root *root, const char *function,
3962 unsigned int line, int errno);
3964 #define btrfs_set_fs_incompat(__fs_info, opt) \
3965 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3967 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3970 struct btrfs_super_block *disk_super;
3973 disk_super = fs_info->super_copy;
3974 features = btrfs_super_incompat_flags(disk_super);
3975 if (!(features & flag)) {
3976 spin_lock(&fs_info->super_lock);
3977 features = btrfs_super_incompat_flags(disk_super);
3978 if (!(features & flag)) {
3980 btrfs_set_super_incompat_flags(disk_super, features);
3981 btrfs_info(fs_info, "setting %llu feature flag",
3984 spin_unlock(&fs_info->super_lock);
3988 #define btrfs_fs_incompat(fs_info, opt) \
3989 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3991 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3993 struct btrfs_super_block *disk_super;
3994 disk_super = fs_info->super_copy;
3995 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3999 * Call btrfs_abort_transaction as early as possible when an error condition is
4000 * detected, that way the exact line number is reported.
4003 #define btrfs_abort_transaction(trans, root, errno) \
4005 __btrfs_abort_transaction(trans, root, __func__, \
4009 #define btrfs_std_error(fs_info, errno) \
4012 __btrfs_std_error((fs_info), __func__, \
4013 __LINE__, (errno), NULL); \
4016 #define btrfs_error(fs_info, errno, fmt, args...) \
4018 __btrfs_std_error((fs_info), __func__, __LINE__, \
4019 (errno), fmt, ##args); \
4023 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
4024 unsigned int line, int errno, const char *fmt, ...);
4027 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4028 * will panic(). Otherwise we BUG() here.
4030 #define btrfs_panic(fs_info, errno, fmt, args...) \
4032 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4037 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4038 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
4039 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
4040 int btrfs_init_acl(struct btrfs_trans_handle *trans,
4041 struct inode *inode, struct inode *dir);
4043 #define btrfs_get_acl NULL
4044 #define btrfs_set_acl NULL
4045 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
4046 struct inode *inode, struct inode *dir)
4053 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
4054 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
4055 struct btrfs_root *root);
4056 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
4057 struct btrfs_root *root);
4058 int btrfs_recover_relocation(struct btrfs_root *root);
4059 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
4060 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
4061 struct btrfs_root *root, struct extent_buffer *buf,
4062 struct extent_buffer *cow);
4063 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
4064 struct btrfs_pending_snapshot *pending,
4065 u64 *bytes_to_reserve);
4066 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4067 struct btrfs_pending_snapshot *pending);
4070 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
4071 u64 end, struct btrfs_scrub_progress *progress,
4072 int readonly, int is_dev_replace);
4073 void btrfs_scrub_pause(struct btrfs_root *root);
4074 void btrfs_scrub_continue(struct btrfs_root *root);
4075 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4076 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4077 struct btrfs_device *dev);
4078 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4079 struct btrfs_scrub_progress *progress);
4082 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
4083 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
4084 void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info);
4087 struct reada_control {
4088 struct btrfs_root *root; /* tree to prefetch */
4089 struct btrfs_key key_start;
4090 struct btrfs_key key_end; /* exclusive */
4093 wait_queue_head_t wait;
4095 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4096 struct btrfs_key *start, struct btrfs_key *end);
4097 int btrfs_reada_wait(void *handle);
4098 void btrfs_reada_detach(void *handle);
4099 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
4100 u64 start, int err);
4102 static inline int is_fstree(u64 rootid)
4104 if (rootid == BTRFS_FS_TREE_OBJECTID ||
4105 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
4110 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4112 return signal_pending(current);
4115 /* Sanity test specific functions */
4116 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4117 void btrfs_test_destroy_inode(struct inode *inode);
4118 int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid,
4119 u64 rfer, u64 excl);