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
65 /* holds pointers to all of the tree roots */
66 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
68 /* stores information about which extents are in use, and reference counts */
69 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
72 * chunk tree stores translations from logical -> physical block numbering
73 * the super block points to the chunk tree
75 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
78 * stores information about which areas of a given device are in use.
79 * one per device. The tree of tree roots points to the device tree
81 #define BTRFS_DEV_TREE_OBJECTID 4ULL
83 /* one per subvolume, storing files and directories */
84 #define BTRFS_FS_TREE_OBJECTID 5ULL
86 /* directory objectid inside the root tree */
87 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
89 /* holds checksums of all the data extents */
90 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
92 /* holds quota configuration and tracking */
93 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
95 /* for storing items that use the BTRFS_UUID_KEY* types */
96 #define BTRFS_UUID_TREE_OBJECTID 9ULL
98 /* for storing balance parameters in the root tree */
99 #define BTRFS_BALANCE_OBJECTID -4ULL
101 /* orhpan objectid for tracking unlinked/truncated files */
102 #define BTRFS_ORPHAN_OBJECTID -5ULL
104 /* does write ahead logging to speed up fsyncs */
105 #define BTRFS_TREE_LOG_OBJECTID -6ULL
106 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
108 /* for space balancing */
109 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
110 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
113 * extent checksums all have this objectid
114 * this allows them to share the logging tree
117 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
119 /* For storing free space cache */
120 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
123 * The inode number assigned to the special inode for storing
126 #define BTRFS_FREE_INO_OBJECTID -12ULL
128 /* dummy objectid represents multiple objectids */
129 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
132 * All files have objectids in this range.
134 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
135 #define BTRFS_LAST_FREE_OBJECTID -256ULL
136 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
140 * the device items go into the chunk tree. The key is in the form
141 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
143 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
145 #define BTRFS_BTREE_INODE_OBJECTID 1
147 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
149 #define BTRFS_DEV_REPLACE_DEVID 0ULL
152 * the max metadata block size. This limit is somewhat artificial,
153 * but the memmove costs go through the roof for larger blocks.
155 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
158 * we can actually store much bigger names, but lets not confuse the rest
161 #define BTRFS_NAME_LEN 255
164 * Theoretical limit is larger, but we keep this down to a sane
165 * value. That should limit greatly the possibility of collisions on
168 #define BTRFS_LINK_MAX 65535U
170 /* 32 bytes in various csum fields */
171 #define BTRFS_CSUM_SIZE 32
174 #define BTRFS_CSUM_TYPE_CRC32 0
176 static int btrfs_csum_sizes[] = { 4, 0 };
178 /* four bytes for CRC32 */
179 #define BTRFS_EMPTY_DIR_SIZE 0
181 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
182 #define REQ_GET_READ_MIRRORS (1 << 30)
184 #define BTRFS_FT_UNKNOWN 0
185 #define BTRFS_FT_REG_FILE 1
186 #define BTRFS_FT_DIR 2
187 #define BTRFS_FT_CHRDEV 3
188 #define BTRFS_FT_BLKDEV 4
189 #define BTRFS_FT_FIFO 5
190 #define BTRFS_FT_SOCK 6
191 #define BTRFS_FT_SYMLINK 7
192 #define BTRFS_FT_XATTR 8
193 #define BTRFS_FT_MAX 9
195 /* ioprio of readahead is set to idle */
196 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
198 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
201 * The key defines the order in the tree, and so it also defines (optimal)
204 * objectid corresponds to the inode number.
206 * type tells us things about the object, and is a kind of stream selector.
207 * so for a given inode, keys with type of 1 might refer to the inode data,
208 * type of 2 may point to file data in the btree and type == 3 may point to
211 * offset is the starting byte offset for this key in the stream.
213 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
214 * in cpu native order. Otherwise they are identical and their sizes
215 * should be the same (ie both packed)
217 struct btrfs_disk_key {
221 } __attribute__ ((__packed__));
227 } __attribute__ ((__packed__));
229 struct btrfs_mapping_tree {
230 struct extent_map_tree map_tree;
233 struct btrfs_dev_item {
234 /* the internal btrfs device id */
237 /* size of the device */
243 /* optimal io alignment for this device */
246 /* optimal io width for this device */
249 /* minimal io size for this device */
252 /* type and info about this device */
255 /* expected generation for this device */
259 * starting byte of this partition on the device,
260 * to allow for stripe alignment in the future
264 /* grouping information for allocation decisions */
267 /* seek speed 0-100 where 100 is fastest */
270 /* bandwidth 0-100 where 100 is fastest */
273 /* btrfs generated uuid for this device */
274 u8 uuid[BTRFS_UUID_SIZE];
276 /* uuid of FS who owns this device */
277 u8 fsid[BTRFS_UUID_SIZE];
278 } __attribute__ ((__packed__));
280 struct btrfs_stripe {
283 u8 dev_uuid[BTRFS_UUID_SIZE];
284 } __attribute__ ((__packed__));
287 /* size of this chunk in bytes */
290 /* objectid of the root referencing this chunk */
296 /* optimal io alignment for this chunk */
299 /* optimal io width for this chunk */
302 /* minimal io size for this chunk */
305 /* 2^16 stripes is quite a lot, a second limit is the size of a single
310 /* sub stripes only matter for raid10 */
312 struct btrfs_stripe stripe;
313 /* additional stripes go here */
314 } __attribute__ ((__packed__));
316 #define BTRFS_FREE_SPACE_EXTENT 1
317 #define BTRFS_FREE_SPACE_BITMAP 2
319 struct btrfs_free_space_entry {
323 } __attribute__ ((__packed__));
325 struct btrfs_free_space_header {
326 struct btrfs_disk_key location;
330 } __attribute__ ((__packed__));
332 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
334 BUG_ON(num_stripes == 0);
335 return sizeof(struct btrfs_chunk) +
336 sizeof(struct btrfs_stripe) * (num_stripes - 1);
339 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
340 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
345 #define BTRFS_FS_STATE_ERROR 0
346 #define BTRFS_FS_STATE_REMOUNTING 1
347 #define BTRFS_FS_STATE_TRANS_ABORTED 2
348 #define BTRFS_FS_STATE_DEV_REPLACING 3
350 /* Super block flags */
351 /* Errors detected */
352 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
354 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
355 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
357 #define BTRFS_BACKREF_REV_MAX 256
358 #define BTRFS_BACKREF_REV_SHIFT 56
359 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
360 BTRFS_BACKREF_REV_SHIFT)
362 #define BTRFS_OLD_BACKREF_REV 0
363 #define BTRFS_MIXED_BACKREF_REV 1
366 * every tree block (leaf or node) starts with this header.
368 struct btrfs_header {
369 /* these first four must match the super block */
370 u8 csum[BTRFS_CSUM_SIZE];
371 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
372 __le64 bytenr; /* which block this node is supposed to live in */
375 /* allowed to be different from the super from here on down */
376 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
381 } __attribute__ ((__packed__));
383 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
384 sizeof(struct btrfs_header)) / \
385 sizeof(struct btrfs_key_ptr))
386 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
387 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
388 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
389 sizeof(struct btrfs_item) - \
390 offsetof(struct btrfs_file_extent_item, disk_bytenr))
391 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
392 sizeof(struct btrfs_item) -\
393 sizeof(struct btrfs_dir_item))
397 * this is a very generous portion of the super block, giving us
398 * room to translate 14 chunks with 3 stripes each.
400 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
401 #define BTRFS_LABEL_SIZE 256
404 * just in case we somehow lose the roots and are not able to mount,
405 * we store an array of the roots from previous transactions
408 #define BTRFS_NUM_BACKUP_ROOTS 4
409 struct btrfs_root_backup {
411 __le64 tree_root_gen;
414 __le64 chunk_root_gen;
417 __le64 extent_root_gen;
426 __le64 csum_root_gen;
436 u8 extent_root_level;
440 /* future and to align */
442 } __attribute__ ((__packed__));
445 * the super block basically lists the main trees of the FS
446 * it currently lacks any block count etc etc
448 struct btrfs_super_block {
449 u8 csum[BTRFS_CSUM_SIZE];
450 /* the first 4 fields must match struct btrfs_header */
451 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
452 __le64 bytenr; /* this block number */
455 /* allowed to be different from the btrfs_header from here own down */
462 /* this will help find the new super based on the log root */
463 __le64 log_root_transid;
466 __le64 root_dir_objectid;
470 __le32 __unused_leafsize;
472 __le32 sys_chunk_array_size;
473 __le64 chunk_root_generation;
475 __le64 compat_ro_flags;
476 __le64 incompat_flags;
481 struct btrfs_dev_item dev_item;
483 char label[BTRFS_LABEL_SIZE];
485 __le64 cache_generation;
486 __le64 uuid_tree_generation;
488 /* future expansion */
490 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
491 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
492 } __attribute__ ((__packed__));
495 * Compat flags that we support. If any incompat flags are set other than the
496 * ones specified below then we will fail to mount
498 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
499 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
500 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
501 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
503 * some patches floated around with a second compression method
504 * lets save that incompat here for when they do get in
505 * Note we don't actually support it, we're just reserving the
508 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
511 * older kernels tried to do bigger metadata blocks, but the
512 * code was pretty buggy. Lets not let them try anymore.
514 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
516 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
517 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
518 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
519 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
521 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
522 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
523 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
524 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
525 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
526 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
528 #define BTRFS_FEATURE_INCOMPAT_SUPP \
529 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
530 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
531 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
532 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
533 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
534 BTRFS_FEATURE_INCOMPAT_RAID56 | \
535 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
536 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
537 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
539 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
540 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
541 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
544 * A leaf is full of items. offset and size tell us where to find
545 * the item in the leaf (relative to the start of the data area)
548 struct btrfs_disk_key key;
551 } __attribute__ ((__packed__));
554 * leaves have an item area and a data area:
555 * [item0, item1....itemN] [free space] [dataN...data1, data0]
557 * The data is separate from the items to get the keys closer together
561 struct btrfs_header header;
562 struct btrfs_item items[];
563 } __attribute__ ((__packed__));
566 * all non-leaf blocks are nodes, they hold only keys and pointers to
569 struct btrfs_key_ptr {
570 struct btrfs_disk_key key;
573 } __attribute__ ((__packed__));
576 struct btrfs_header header;
577 struct btrfs_key_ptr ptrs[];
578 } __attribute__ ((__packed__));
581 * btrfs_paths remember the path taken from the root down to the leaf.
582 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
583 * to any other levels that are present.
585 * The slots array records the index of the item or block pointer
586 * used while walking the tree.
589 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
590 int slots[BTRFS_MAX_LEVEL];
591 /* if there is real range locking, this locks field will change */
592 int locks[BTRFS_MAX_LEVEL];
594 /* keep some upper locks as we walk down */
598 * set by btrfs_split_item, tells search_slot to keep all locks
599 * and to force calls to keep space in the nodes
601 unsigned int search_for_split:1;
602 unsigned int keep_locks:1;
603 unsigned int skip_locking:1;
604 unsigned int leave_spinning:1;
605 unsigned int search_commit_root:1;
606 unsigned int need_commit_sem:1;
610 * items in the extent btree are used to record the objectid of the
611 * owner of the block and the number of references
614 struct btrfs_extent_item {
618 } __attribute__ ((__packed__));
620 struct btrfs_extent_item_v0 {
622 } __attribute__ ((__packed__));
624 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
625 sizeof(struct btrfs_item))
627 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
628 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
630 /* following flags only apply to tree blocks */
632 /* use full backrefs for extent pointers in the block */
633 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
636 * this flag is only used internally by scrub and may be changed at any time
637 * it is only declared here to avoid collisions
639 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
641 struct btrfs_tree_block_info {
642 struct btrfs_disk_key key;
644 } __attribute__ ((__packed__));
646 struct btrfs_extent_data_ref {
651 } __attribute__ ((__packed__));
653 struct btrfs_shared_data_ref {
655 } __attribute__ ((__packed__));
657 struct btrfs_extent_inline_ref {
660 } __attribute__ ((__packed__));
662 /* old style backrefs item */
663 struct btrfs_extent_ref_v0 {
668 } __attribute__ ((__packed__));
671 /* dev extents record free space on individual devices. The owner
672 * field points back to the chunk allocation mapping tree that allocated
673 * the extent. The chunk tree uuid field is a way to double check the owner
675 struct btrfs_dev_extent {
677 __le64 chunk_objectid;
680 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
681 } __attribute__ ((__packed__));
683 struct btrfs_inode_ref {
687 } __attribute__ ((__packed__));
689 struct btrfs_inode_extref {
690 __le64 parent_objectid;
695 } __attribute__ ((__packed__));
697 struct btrfs_timespec {
700 } __attribute__ ((__packed__));
702 enum btrfs_compression_type {
703 BTRFS_COMPRESS_NONE = 0,
704 BTRFS_COMPRESS_ZLIB = 1,
705 BTRFS_COMPRESS_LZO = 2,
706 BTRFS_COMPRESS_TYPES = 2,
707 BTRFS_COMPRESS_LAST = 3,
710 struct btrfs_inode_item {
711 /* nfs style generation number */
713 /* transid that last touched this inode */
725 /* modification sequence number for NFS */
729 * a little future expansion, for more than this we can
730 * just grow the inode item and version it
733 struct btrfs_timespec atime;
734 struct btrfs_timespec ctime;
735 struct btrfs_timespec mtime;
736 struct btrfs_timespec otime;
737 } __attribute__ ((__packed__));
739 struct btrfs_dir_log_item {
741 } __attribute__ ((__packed__));
743 struct btrfs_dir_item {
744 struct btrfs_disk_key location;
749 } __attribute__ ((__packed__));
751 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
754 * Internal in-memory flag that a subvolume has been marked for deletion but
755 * still visible as a directory
757 #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
759 struct btrfs_root_item {
760 struct btrfs_inode_item inode;
766 __le64 last_snapshot;
769 struct btrfs_disk_key drop_progress;
774 * The following fields appear after subvol_uuids+subvol_times
779 * This generation number is used to test if the new fields are valid
780 * and up to date while reading the root item. Everytime the root item
781 * is written out, the "generation" field is copied into this field. If
782 * anyone ever mounted the fs with an older kernel, we will have
783 * mismatching generation values here and thus must invalidate the
784 * new fields. See btrfs_update_root and btrfs_find_last_root for
786 * the offset of generation_v2 is also used as the start for the memset
787 * when invalidating the fields.
789 __le64 generation_v2;
790 u8 uuid[BTRFS_UUID_SIZE];
791 u8 parent_uuid[BTRFS_UUID_SIZE];
792 u8 received_uuid[BTRFS_UUID_SIZE];
793 __le64 ctransid; /* updated when an inode changes */
794 __le64 otransid; /* trans when created */
795 __le64 stransid; /* trans when sent. non-zero for received subvol */
796 __le64 rtransid; /* trans when received. non-zero for received subvol */
797 struct btrfs_timespec ctime;
798 struct btrfs_timespec otime;
799 struct btrfs_timespec stime;
800 struct btrfs_timespec rtime;
801 __le64 reserved[8]; /* for future */
802 } __attribute__ ((__packed__));
805 * this is used for both forward and backward root refs
807 struct btrfs_root_ref {
811 } __attribute__ ((__packed__));
813 struct btrfs_disk_balance_args {
815 * profiles to operate on, single is denoted by
816 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
826 /* devid subset filter [pstart..pend) */
830 /* btrfs virtual address space subset filter [vstart..vend) */
835 * profile to convert to, single is denoted by
836 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
840 /* BTRFS_BALANCE_ARGS_* */
843 /* BTRFS_BALANCE_ARGS_LIMIT value */
847 } __attribute__ ((__packed__));
850 * store balance parameters to disk so that balance can be properly
851 * resumed after crash or unmount
853 struct btrfs_balance_item {
854 /* BTRFS_BALANCE_* */
857 struct btrfs_disk_balance_args data;
858 struct btrfs_disk_balance_args meta;
859 struct btrfs_disk_balance_args sys;
862 } __attribute__ ((__packed__));
864 #define BTRFS_FILE_EXTENT_INLINE 0
865 #define BTRFS_FILE_EXTENT_REG 1
866 #define BTRFS_FILE_EXTENT_PREALLOC 2
868 struct btrfs_file_extent_item {
870 * transaction id that created this extent
874 * max number of bytes to hold this extent in ram
875 * when we split a compressed extent we can't know how big
876 * each of the resulting pieces will be. So, this is
877 * an upper limit on the size of the extent in ram instead of
883 * 32 bits for the various ways we might encode the data,
884 * including compression and encryption. If any of these
885 * are set to something a given disk format doesn't understand
886 * it is treated like an incompat flag for reading and writing,
891 __le16 other_encoding; /* spare for later use */
893 /* are we inline data or a real extent? */
897 * disk space consumed by the extent, checksum blocks are included
901 __le64 disk_num_bytes;
903 * the logical offset in file blocks (no csums)
904 * this extent record is for. This allows a file extent to point
905 * into the middle of an existing extent on disk, sharing it
906 * between two snapshots (useful if some bytes in the middle of the
907 * extent have changed
911 * the logical number of file blocks (no csums included). This
912 * always reflects the size uncompressed and without encoding.
916 } __attribute__ ((__packed__));
918 struct btrfs_csum_item {
920 } __attribute__ ((__packed__));
922 struct btrfs_dev_stats_item {
924 * grow this item struct at the end for future enhancements and keep
925 * the existing values unchanged
927 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
928 } __attribute__ ((__packed__));
930 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
931 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
932 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
933 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
934 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
935 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
936 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
938 struct btrfs_dev_replace {
939 u64 replace_state; /* see #define above */
940 u64 time_started; /* seconds since 1-Jan-1970 */
941 u64 time_stopped; /* seconds since 1-Jan-1970 */
942 atomic64_t num_write_errors;
943 atomic64_t num_uncorrectable_read_errors;
946 u64 committed_cursor_left;
947 u64 cursor_left_last_write_of_item;
950 u64 cont_reading_from_srcdev_mode; /* see #define above */
953 int item_needs_writeback;
954 struct btrfs_device *srcdev;
955 struct btrfs_device *tgtdev;
958 atomic_t nesting_level;
959 struct mutex lock_finishing_cancel_unmount;
960 struct mutex lock_management_lock;
963 struct btrfs_scrub_progress scrub_progress;
966 struct btrfs_dev_replace_item {
968 * grow this item struct at the end for future enhancements and keep
969 * the existing values unchanged
974 __le64 cont_reading_from_srcdev_mode;
976 __le64 replace_state;
979 __le64 num_write_errors;
980 __le64 num_uncorrectable_read_errors;
981 } __attribute__ ((__packed__));
983 /* different types of block groups (and chunks) */
984 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
985 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
986 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
987 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
988 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
989 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
990 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
991 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
992 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
993 #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
994 BTRFS_SPACE_INFO_GLOBAL_RSV)
996 enum btrfs_raid_types {
1007 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1008 BTRFS_BLOCK_GROUP_SYSTEM | \
1009 BTRFS_BLOCK_GROUP_METADATA)
1011 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1012 BTRFS_BLOCK_GROUP_RAID1 | \
1013 BTRFS_BLOCK_GROUP_RAID5 | \
1014 BTRFS_BLOCK_GROUP_RAID6 | \
1015 BTRFS_BLOCK_GROUP_DUP | \
1016 BTRFS_BLOCK_GROUP_RAID10)
1018 * We need a bit for restriper to be able to tell when chunks of type
1019 * SINGLE are available. This "extended" profile format is used in
1020 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1021 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1022 * to avoid remappings between two formats in future.
1024 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1027 * A fake block group type that is used to communicate global block reserve
1028 * size to userspace via the SPACE_INFO ioctl.
1030 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1032 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1033 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1035 static inline u64 chunk_to_extended(u64 flags)
1037 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1038 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1042 static inline u64 extended_to_chunk(u64 flags)
1044 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1047 struct btrfs_block_group_item {
1049 __le64 chunk_objectid;
1051 } __attribute__ ((__packed__));
1054 * is subvolume quota turned on?
1056 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1058 * RESCAN is set during the initialization phase
1060 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1062 * Some qgroup entries are known to be out of date,
1063 * either because the configuration has changed in a way that
1064 * makes a rescan necessary, or because the fs has been mounted
1065 * with a non-qgroup-aware version.
1066 * Turning qouta off and on again makes it inconsistent, too.
1068 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1070 #define BTRFS_QGROUP_STATUS_VERSION 1
1072 struct btrfs_qgroup_status_item {
1075 * the generation is updated during every commit. As older
1076 * versions of btrfs are not aware of qgroups, it will be
1077 * possible to detect inconsistencies by checking the
1078 * generation on mount time
1082 /* flag definitions see above */
1086 * only used during scanning to record the progress
1087 * of the scan. It contains a logical address
1090 } __attribute__ ((__packed__));
1092 struct btrfs_qgroup_info_item {
1098 } __attribute__ ((__packed__));
1100 /* flags definition for qgroup limits */
1101 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1102 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1103 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1104 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1105 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1106 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1108 struct btrfs_qgroup_limit_item {
1110 * only updated when any of the other values change
1117 } __attribute__ ((__packed__));
1119 /* For raid type sysfs entries */
1120 struct raid_kobject {
1122 struct kobject kobj;
1125 struct btrfs_space_info {
1128 u64 total_bytes; /* total bytes in the space,
1129 this doesn't take mirrors into account */
1130 u64 bytes_used; /* total bytes used,
1131 this doesn't take mirrors into account */
1132 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1133 transaction finishes */
1134 u64 bytes_reserved; /* total bytes the allocator has reserved for
1135 current allocations */
1136 u64 bytes_may_use; /* number of bytes that may be used for
1137 delalloc/allocations */
1138 u64 bytes_readonly; /* total bytes that are read only */
1140 unsigned int full:1; /* indicates that we cannot allocate any more
1141 chunks for this space */
1142 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1144 unsigned int flush:1; /* set if we are trying to make space */
1146 unsigned int force_alloc; /* set if we need to force a chunk
1147 alloc for this space */
1149 u64 disk_used; /* total bytes used on disk */
1150 u64 disk_total; /* total bytes on disk, takes mirrors into
1156 * bytes_pinned is kept in line with what is actually pinned, as in
1157 * we've called update_block_group and dropped the bytes_used counter
1158 * and increased the bytes_pinned counter. However this means that
1159 * bytes_pinned does not reflect the bytes that will be pinned once the
1160 * delayed refs are flushed, so this counter is inc'ed everytime we call
1161 * btrfs_free_extent so it is a realtime count of what will be freed
1162 * once the transaction is committed. It will be zero'ed everytime the
1163 * transaction commits.
1165 struct percpu_counter total_bytes_pinned;
1167 struct list_head list;
1169 struct rw_semaphore groups_sem;
1170 /* for block groups in our same type */
1171 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1172 wait_queue_head_t wait;
1174 struct kobject kobj;
1175 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
1178 #define BTRFS_BLOCK_RSV_GLOBAL 1
1179 #define BTRFS_BLOCK_RSV_DELALLOC 2
1180 #define BTRFS_BLOCK_RSV_TRANS 3
1181 #define BTRFS_BLOCK_RSV_CHUNK 4
1182 #define BTRFS_BLOCK_RSV_DELOPS 5
1183 #define BTRFS_BLOCK_RSV_EMPTY 6
1184 #define BTRFS_BLOCK_RSV_TEMP 7
1186 struct btrfs_block_rsv {
1189 struct btrfs_space_info *space_info;
1191 unsigned short full;
1192 unsigned short type;
1193 unsigned short failfast;
1197 * free clusters are used to claim free space in relatively large chunks,
1198 * allowing us to do less seeky writes. They are used for all metadata
1199 * allocations and data allocations in ssd mode.
1201 struct btrfs_free_cluster {
1203 spinlock_t refill_lock;
1204 struct rb_root root;
1206 /* largest extent in this cluster */
1209 /* first extent starting offset */
1212 struct btrfs_block_group_cache *block_group;
1214 * when a cluster is allocated from a block group, we put the
1215 * cluster onto a list in the block group so that it can
1216 * be freed before the block group is freed.
1218 struct list_head block_group_list;
1221 enum btrfs_caching_type {
1223 BTRFS_CACHE_STARTED = 1,
1224 BTRFS_CACHE_FAST = 2,
1225 BTRFS_CACHE_FINISHED = 3,
1226 BTRFS_CACHE_ERROR = 4,
1229 enum btrfs_disk_cache_state {
1230 BTRFS_DC_WRITTEN = 0,
1234 BTRFS_DC_NEED_WRITE = 4,
1237 struct btrfs_caching_control {
1238 struct list_head list;
1240 wait_queue_head_t wait;
1241 struct btrfs_work work;
1242 struct btrfs_block_group_cache *block_group;
1247 struct btrfs_block_group_cache {
1248 struct btrfs_key key;
1249 struct btrfs_block_group_item item;
1250 struct btrfs_fs_info *fs_info;
1251 struct inode *inode;
1259 u64 cache_generation;
1262 * It is just used for the delayed data space allocation because
1263 * only the data space allocation and the relative metadata update
1264 * can be done cross the transaction.
1266 struct rw_semaphore data_rwsem;
1268 /* for raid56, this is a full stripe, without parity */
1269 unsigned long full_stripe_len;
1272 unsigned int dirty:1;
1273 unsigned int iref:1;
1275 int disk_cache_state;
1277 /* cache tracking stuff */
1279 struct btrfs_caching_control *caching_ctl;
1280 u64 last_byte_to_unpin;
1282 struct btrfs_space_info *space_info;
1284 /* free space cache stuff */
1285 struct btrfs_free_space_ctl *free_space_ctl;
1287 /* block group cache stuff */
1288 struct rb_node cache_node;
1290 /* for block groups in the same raid type */
1291 struct list_head list;
1296 /* List of struct btrfs_free_clusters for this block group.
1297 * Today it will only have one thing on it, but that may change
1299 struct list_head cluster_list;
1301 /* For delayed block group creation */
1302 struct list_head new_bg_list;
1305 /* delayed seq elem */
1307 struct list_head list;
1311 enum btrfs_orphan_cleanup_state {
1312 ORPHAN_CLEANUP_STARTED = 1,
1313 ORPHAN_CLEANUP_DONE = 2,
1316 /* used by the raid56 code to lock stripes for read/modify/write */
1317 struct btrfs_stripe_hash {
1318 struct list_head hash_list;
1319 wait_queue_head_t wait;
1323 /* used by the raid56 code to lock stripes for read/modify/write */
1324 struct btrfs_stripe_hash_table {
1325 struct list_head stripe_cache;
1326 spinlock_t cache_lock;
1328 struct btrfs_stripe_hash table[];
1331 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1333 void btrfs_init_async_reclaim_work(struct work_struct *work);
1336 struct reloc_control;
1337 struct btrfs_device;
1338 struct btrfs_fs_devices;
1339 struct btrfs_balance_control;
1340 struct btrfs_delayed_root;
1341 struct btrfs_fs_info {
1342 u8 fsid[BTRFS_FSID_SIZE];
1343 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1344 struct btrfs_root *extent_root;
1345 struct btrfs_root *tree_root;
1346 struct btrfs_root *chunk_root;
1347 struct btrfs_root *dev_root;
1348 struct btrfs_root *fs_root;
1349 struct btrfs_root *csum_root;
1350 struct btrfs_root *quota_root;
1351 struct btrfs_root *uuid_root;
1353 /* the log root tree is a directory of all the other log roots */
1354 struct btrfs_root *log_root_tree;
1356 spinlock_t fs_roots_radix_lock;
1357 struct radix_tree_root fs_roots_radix;
1359 /* block group cache stuff */
1360 spinlock_t block_group_cache_lock;
1361 u64 first_logical_byte;
1362 struct rb_root block_group_cache_tree;
1364 /* keep track of unallocated space */
1365 spinlock_t free_chunk_lock;
1366 u64 free_chunk_space;
1368 struct extent_io_tree freed_extents[2];
1369 struct extent_io_tree *pinned_extents;
1371 /* logical->physical extent mapping */
1372 struct btrfs_mapping_tree mapping_tree;
1375 * block reservation for extent, checksum, root tree and
1376 * delayed dir index item
1378 struct btrfs_block_rsv global_block_rsv;
1379 /* block reservation for delay allocation */
1380 struct btrfs_block_rsv delalloc_block_rsv;
1381 /* block reservation for metadata operations */
1382 struct btrfs_block_rsv trans_block_rsv;
1383 /* block reservation for chunk tree */
1384 struct btrfs_block_rsv chunk_block_rsv;
1385 /* block reservation for delayed operations */
1386 struct btrfs_block_rsv delayed_block_rsv;
1388 struct btrfs_block_rsv empty_block_rsv;
1391 u64 last_trans_committed;
1392 u64 avg_delayed_ref_runtime;
1395 * this is updated to the current trans every time a full commit
1396 * is required instead of the faster short fsync log commits
1398 u64 last_trans_log_full_commit;
1399 unsigned long mount_opt;
1400 unsigned long compress_type:4;
1401 int commit_interval;
1403 * It is a suggestive number, the read side is safe even it gets a
1404 * wrong number because we will write out the data into a regular
1405 * extent. The write side(mount/remount) is under ->s_umount lock,
1406 * so it is also safe.
1410 * Protected by ->chunk_mutex and sb->s_umount.
1412 * The reason that we use two lock to protect it is because only
1413 * remount and mount operations can change it and these two operations
1414 * are under sb->s_umount, but the read side (chunk allocation) can not
1415 * acquire sb->s_umount or the deadlock would happen. So we use two
1416 * locks to protect it. On the write side, we must acquire two locks,
1417 * and on the read side, we just need acquire one of them.
1420 struct btrfs_transaction *running_transaction;
1421 wait_queue_head_t transaction_throttle;
1422 wait_queue_head_t transaction_wait;
1423 wait_queue_head_t transaction_blocked_wait;
1424 wait_queue_head_t async_submit_wait;
1427 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1428 * when they are updated.
1430 * Because we do not clear the flags for ever, so we needn't use
1431 * the lock on the read side.
1433 * We also needn't use the lock when we mount the fs, because
1434 * there is no other task which will update the flag.
1436 spinlock_t super_lock;
1437 struct btrfs_super_block *super_copy;
1438 struct btrfs_super_block *super_for_commit;
1439 struct block_device *__bdev;
1440 struct super_block *sb;
1441 struct inode *btree_inode;
1442 struct backing_dev_info bdi;
1443 struct mutex tree_log_mutex;
1444 struct mutex transaction_kthread_mutex;
1445 struct mutex cleaner_mutex;
1446 struct mutex chunk_mutex;
1447 struct mutex volume_mutex;
1449 /* this is used during read/modify/write to make sure
1450 * no two ios are trying to mod the same stripe at the same
1453 struct btrfs_stripe_hash_table *stripe_hash_table;
1456 * this protects the ordered operations list only while we are
1457 * processing all of the entries on it. This way we make
1458 * sure the commit code doesn't find the list temporarily empty
1459 * because another function happens to be doing non-waiting preflush
1460 * before jumping into the main commit.
1462 struct mutex ordered_operations_mutex;
1465 * Same as ordered_operations_mutex except this is for ordered extents
1466 * and not the operations.
1468 struct mutex ordered_extent_flush_mutex;
1470 struct rw_semaphore commit_root_sem;
1472 struct rw_semaphore cleanup_work_sem;
1474 struct rw_semaphore subvol_sem;
1475 struct srcu_struct subvol_srcu;
1477 spinlock_t trans_lock;
1479 * the reloc mutex goes with the trans lock, it is taken
1480 * during commit to protect us from the relocation code
1482 struct mutex reloc_mutex;
1484 struct list_head trans_list;
1485 struct list_head dead_roots;
1486 struct list_head caching_block_groups;
1488 spinlock_t delayed_iput_lock;
1489 struct list_head delayed_iputs;
1491 /* this protects tree_mod_seq_list */
1492 spinlock_t tree_mod_seq_lock;
1493 atomic64_t tree_mod_seq;
1494 struct list_head tree_mod_seq_list;
1496 /* this protects tree_mod_log */
1497 rwlock_t tree_mod_log_lock;
1498 struct rb_root tree_mod_log;
1500 atomic_t nr_async_submits;
1501 atomic_t async_submit_draining;
1502 atomic_t nr_async_bios;
1503 atomic_t async_delalloc_pages;
1504 atomic_t open_ioctl_trans;
1507 * this is used to protect the following list -- ordered_roots.
1509 spinlock_t ordered_root_lock;
1512 * all fs/file tree roots in which there are data=ordered extents
1513 * pending writeback are added into this list.
1515 * these can span multiple transactions and basically include
1516 * every dirty data page that isn't from nodatacow
1518 struct list_head ordered_roots;
1520 struct mutex delalloc_root_mutex;
1521 spinlock_t delalloc_root_lock;
1522 /* all fs/file tree roots that have delalloc inodes. */
1523 struct list_head delalloc_roots;
1526 * there is a pool of worker threads for checksumming during writes
1527 * and a pool for checksumming after reads. This is because readers
1528 * can run with FS locks held, and the writers may be waiting for
1529 * those locks. We don't want ordering in the pending list to cause
1530 * deadlocks, and so the two are serviced separately.
1532 * A third pool does submit_bio to avoid deadlocking with the other
1535 struct btrfs_workqueue *workers;
1536 struct btrfs_workqueue *delalloc_workers;
1537 struct btrfs_workqueue *flush_workers;
1538 struct btrfs_workqueue *endio_workers;
1539 struct btrfs_workqueue *endio_meta_workers;
1540 struct btrfs_workqueue *endio_raid56_workers;
1541 struct btrfs_workqueue *rmw_workers;
1542 struct btrfs_workqueue *endio_meta_write_workers;
1543 struct btrfs_workqueue *endio_write_workers;
1544 struct btrfs_workqueue *endio_freespace_worker;
1545 struct btrfs_workqueue *submit_workers;
1546 struct btrfs_workqueue *caching_workers;
1547 struct btrfs_workqueue *readahead_workers;
1550 * fixup workers take dirty pages that didn't properly go through
1551 * the cow mechanism and make them safe to write. It happens
1552 * for the sys_munmap function call path
1554 struct btrfs_workqueue *fixup_workers;
1555 struct btrfs_workqueue *delayed_workers;
1557 /* the extent workers do delayed refs on the extent allocation tree */
1558 struct btrfs_workqueue *extent_workers;
1559 struct task_struct *transaction_kthread;
1560 struct task_struct *cleaner_kthread;
1561 int thread_pool_size;
1563 struct kobject super_kobj;
1564 struct kobject *space_info_kobj;
1565 struct kobject *device_dir_kobj;
1566 struct completion kobj_unregister;
1569 int log_root_recovering;
1573 /* used to keep from writing metadata until there is a nice batch */
1574 struct percpu_counter dirty_metadata_bytes;
1575 struct percpu_counter delalloc_bytes;
1576 s32 dirty_metadata_batch;
1579 struct list_head dirty_cowonly_roots;
1581 struct btrfs_fs_devices *fs_devices;
1584 * the space_info list is almost entirely read only. It only changes
1585 * when we add a new raid type to the FS, and that happens
1586 * very rarely. RCU is used to protect it.
1588 struct list_head space_info;
1590 struct btrfs_space_info *data_sinfo;
1592 struct reloc_control *reloc_ctl;
1594 /* data_alloc_cluster is only used in ssd mode */
1595 struct btrfs_free_cluster data_alloc_cluster;
1597 /* all metadata allocations go through this cluster */
1598 struct btrfs_free_cluster meta_alloc_cluster;
1600 /* auto defrag inodes go here */
1601 spinlock_t defrag_inodes_lock;
1602 struct rb_root defrag_inodes;
1603 atomic_t defrag_running;
1605 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1606 seqlock_t profiles_lock;
1608 * these three are in extended format (availability of single
1609 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1610 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1612 u64 avail_data_alloc_bits;
1613 u64 avail_metadata_alloc_bits;
1614 u64 avail_system_alloc_bits;
1616 /* restriper state */
1617 spinlock_t balance_lock;
1618 struct mutex balance_mutex;
1619 atomic_t balance_running;
1620 atomic_t balance_pause_req;
1621 atomic_t balance_cancel_req;
1622 struct btrfs_balance_control *balance_ctl;
1623 wait_queue_head_t balance_wait_q;
1625 unsigned data_chunk_allocations;
1626 unsigned metadata_ratio;
1630 /* private scrub information */
1631 struct mutex scrub_lock;
1632 atomic_t scrubs_running;
1633 atomic_t scrub_pause_req;
1634 atomic_t scrubs_paused;
1635 atomic_t scrub_cancel_req;
1636 wait_queue_head_t scrub_pause_wait;
1637 int scrub_workers_refcnt;
1638 struct btrfs_workqueue *scrub_workers;
1639 struct btrfs_workqueue *scrub_wr_completion_workers;
1640 struct btrfs_workqueue *scrub_nocow_workers;
1642 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1643 u32 check_integrity_print_mask;
1648 unsigned int quota_enabled:1;
1651 * quota_enabled only changes state after a commit. This holds the
1654 unsigned int pending_quota_state:1;
1656 /* is qgroup tracking in a consistent state? */
1659 /* holds configuration and tracking. Protected by qgroup_lock */
1660 struct rb_root qgroup_tree;
1661 struct rb_root qgroup_op_tree;
1662 spinlock_t qgroup_lock;
1663 spinlock_t qgroup_op_lock;
1664 atomic_t qgroup_op_seq;
1667 * used to avoid frequently calling ulist_alloc()/ulist_free()
1668 * when doing qgroup accounting, it must be protected by qgroup_lock.
1670 struct ulist *qgroup_ulist;
1672 /* protect user change for quota operations */
1673 struct mutex qgroup_ioctl_lock;
1675 /* list of dirty qgroups to be written at next commit */
1676 struct list_head dirty_qgroups;
1678 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1681 /* qgroup rescan items */
1682 struct mutex qgroup_rescan_lock; /* protects the progress item */
1683 struct btrfs_key qgroup_rescan_progress;
1684 struct btrfs_workqueue *qgroup_rescan_workers;
1685 struct completion qgroup_rescan_completion;
1686 struct btrfs_work qgroup_rescan_work;
1688 /* filesystem state */
1689 unsigned long fs_state;
1691 struct btrfs_delayed_root *delayed_root;
1693 /* readahead tree */
1694 spinlock_t reada_lock;
1695 struct radix_tree_root reada_tree;
1697 /* Extent buffer radix tree */
1698 spinlock_t buffer_lock;
1699 struct radix_tree_root buffer_radix;
1701 /* next backup root to be overwritten */
1702 int backup_root_index;
1704 int num_tolerated_disk_barrier_failures;
1706 /* device replace state */
1707 struct btrfs_dev_replace dev_replace;
1709 atomic_t mutually_exclusive_operation_running;
1711 struct percpu_counter bio_counter;
1712 wait_queue_head_t replace_wait;
1714 struct semaphore uuid_tree_rescan_sem;
1715 unsigned int update_uuid_tree_gen:1;
1717 /* Used to reclaim the metadata space in the background. */
1718 struct work_struct async_reclaim_work;
1721 struct btrfs_subvolume_writers {
1722 struct percpu_counter counter;
1723 wait_queue_head_t wait;
1727 * The state of btrfs root
1730 * btrfs_record_root_in_trans is a multi-step process,
1731 * and it can race with the balancing code. But the
1732 * race is very small, and only the first time the root
1733 * is added to each transaction. So IN_TRANS_SETUP
1734 * is used to tell us when more checks are required
1736 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1737 #define BTRFS_ROOT_REF_COWS 1
1738 #define BTRFS_ROOT_TRACK_DIRTY 2
1739 #define BTRFS_ROOT_IN_RADIX 3
1740 #define BTRFS_ROOT_DUMMY_ROOT 4
1741 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1742 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1743 #define BTRFS_ROOT_FORCE_COW 7
1744 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1747 * in ram representation of the tree. extent_root is used for all allocations
1748 * and for the extent tree extent_root root.
1751 struct extent_buffer *node;
1753 struct extent_buffer *commit_root;
1754 struct btrfs_root *log_root;
1755 struct btrfs_root *reloc_root;
1757 unsigned long state;
1758 struct btrfs_root_item root_item;
1759 struct btrfs_key root_key;
1760 struct btrfs_fs_info *fs_info;
1761 struct extent_io_tree dirty_log_pages;
1763 struct kobject root_kobj;
1764 struct completion kobj_unregister;
1765 struct mutex objectid_mutex;
1767 spinlock_t accounting_lock;
1768 struct btrfs_block_rsv *block_rsv;
1770 /* free ino cache stuff */
1771 struct btrfs_free_space_ctl *free_ino_ctl;
1772 enum btrfs_caching_type ino_cache_state;
1773 spinlock_t ino_cache_lock;
1774 wait_queue_head_t ino_cache_wait;
1775 struct btrfs_free_space_ctl *free_ino_pinned;
1776 u64 ino_cache_progress;
1777 struct inode *ino_cache_inode;
1779 struct mutex log_mutex;
1780 wait_queue_head_t log_writer_wait;
1781 wait_queue_head_t log_commit_wait[2];
1782 struct list_head log_ctxs[2];
1783 atomic_t log_writers;
1784 atomic_t log_commit[2];
1787 /* No matter the commit succeeds or not*/
1788 int log_transid_committed;
1789 /* Just be updated when the commit succeeds. */
1790 int last_log_commit;
1791 pid_t log_start_pid;
1796 /* data allocations are done in sectorsize units */
1799 /* node allocations are done in nodesize units */
1806 u64 highest_objectid;
1808 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1812 u64 defrag_trans_start;
1813 struct btrfs_key defrag_progress;
1814 struct btrfs_key defrag_max;
1817 /* the dirty list is only used by non-reference counted roots */
1818 struct list_head dirty_list;
1820 struct list_head root_list;
1822 spinlock_t log_extents_lock[2];
1823 struct list_head logged_list[2];
1825 spinlock_t orphan_lock;
1826 atomic_t orphan_inodes;
1827 struct btrfs_block_rsv *orphan_block_rsv;
1828 int orphan_cleanup_state;
1830 spinlock_t inode_lock;
1831 /* red-black tree that keeps track of in-memory inodes */
1832 struct rb_root inode_tree;
1835 * radix tree that keeps track of delayed nodes of every inode,
1836 * protected by inode_lock
1838 struct radix_tree_root delayed_nodes_tree;
1840 * right now this just gets used so that a root has its own devid
1841 * for stat. It may be used for more later
1845 spinlock_t root_item_lock;
1848 struct mutex delalloc_mutex;
1849 spinlock_t delalloc_lock;
1851 * all of the inodes that have delalloc bytes. It is possible for
1852 * this list to be empty even when there is still dirty data=ordered
1853 * extents waiting to finish IO.
1855 struct list_head delalloc_inodes;
1856 struct list_head delalloc_root;
1857 u64 nr_delalloc_inodes;
1859 struct mutex ordered_extent_mutex;
1861 * this is used by the balancing code to wait for all the pending
1864 spinlock_t ordered_extent_lock;
1867 * all of the data=ordered extents pending writeback
1868 * these can span multiple transactions and basically include
1869 * every dirty data page that isn't from nodatacow
1871 struct list_head ordered_extents;
1872 struct list_head ordered_root;
1873 u64 nr_ordered_extents;
1876 * Number of currently running SEND ioctls to prevent
1877 * manipulation with the read-only status via SUBVOL_SETFLAGS
1879 int send_in_progress;
1880 struct btrfs_subvolume_writers *subv_writers;
1881 atomic_t will_be_snapshoted;
1884 struct btrfs_ioctl_defrag_range_args {
1885 /* start of the defrag operation */
1888 /* number of bytes to defrag, use (u64)-1 to say all */
1892 * flags for the operation, which can include turning
1893 * on compression for this one defrag
1898 * any extent bigger than this will be considered
1899 * already defragged. Use 0 to take the kernel default
1900 * Use 1 to say every single extent must be rewritten
1902 __u32 extent_thresh;
1905 * which compression method to use if turning on compression
1906 * for this defrag operation. If unspecified, zlib will
1909 __u32 compress_type;
1911 /* spare for later */
1917 * inode items have the data typically returned from stat and store other
1918 * info about object characteristics. There is one for every file and dir in
1921 #define BTRFS_INODE_ITEM_KEY 1
1922 #define BTRFS_INODE_REF_KEY 12
1923 #define BTRFS_INODE_EXTREF_KEY 13
1924 #define BTRFS_XATTR_ITEM_KEY 24
1925 #define BTRFS_ORPHAN_ITEM_KEY 48
1926 /* reserve 2-15 close to the inode for later flexibility */
1929 * dir items are the name -> inode pointers in a directory. There is one
1930 * for every name in a directory.
1932 #define BTRFS_DIR_LOG_ITEM_KEY 60
1933 #define BTRFS_DIR_LOG_INDEX_KEY 72
1934 #define BTRFS_DIR_ITEM_KEY 84
1935 #define BTRFS_DIR_INDEX_KEY 96
1937 * extent data is for file data
1939 #define BTRFS_EXTENT_DATA_KEY 108
1942 * extent csums are stored in a separate tree and hold csums for
1943 * an entire extent on disk.
1945 #define BTRFS_EXTENT_CSUM_KEY 128
1948 * root items point to tree roots. They are typically in the root
1949 * tree used by the super block to find all the other trees
1951 #define BTRFS_ROOT_ITEM_KEY 132
1954 * root backrefs tie subvols and snapshots to the directory entries that
1957 #define BTRFS_ROOT_BACKREF_KEY 144
1960 * root refs make a fast index for listing all of the snapshots and
1961 * subvolumes referenced by a given root. They point directly to the
1962 * directory item in the root that references the subvol
1964 #define BTRFS_ROOT_REF_KEY 156
1967 * extent items are in the extent map tree. These record which blocks
1968 * are used, and how many references there are to each block
1970 #define BTRFS_EXTENT_ITEM_KEY 168
1973 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1974 * the length, so we save the level in key->offset instead of the length.
1976 #define BTRFS_METADATA_ITEM_KEY 169
1978 #define BTRFS_TREE_BLOCK_REF_KEY 176
1980 #define BTRFS_EXTENT_DATA_REF_KEY 178
1982 #define BTRFS_EXTENT_REF_V0_KEY 180
1984 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1986 #define BTRFS_SHARED_DATA_REF_KEY 184
1989 * block groups give us hints into the extent allocation trees. Which
1990 * blocks are free etc etc
1992 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1994 #define BTRFS_DEV_EXTENT_KEY 204
1995 #define BTRFS_DEV_ITEM_KEY 216
1996 #define BTRFS_CHUNK_ITEM_KEY 228
1999 * Records the overall state of the qgroups.
2000 * There's only one instance of this key present,
2001 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
2003 #define BTRFS_QGROUP_STATUS_KEY 240
2005 * Records the currently used space of the qgroup.
2006 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2008 #define BTRFS_QGROUP_INFO_KEY 242
2010 * Contains the user configured limits for the qgroup.
2011 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2013 #define BTRFS_QGROUP_LIMIT_KEY 244
2015 * Records the child-parent relationship of qgroups. For
2016 * each relation, 2 keys are present:
2017 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2018 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2020 #define BTRFS_QGROUP_RELATION_KEY 246
2022 #define BTRFS_BALANCE_ITEM_KEY 248
2025 * Persistantly stores the io stats in the device tree.
2026 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
2028 #define BTRFS_DEV_STATS_KEY 249
2031 * Persistantly stores the device replace state in the device tree.
2032 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2034 #define BTRFS_DEV_REPLACE_KEY 250
2037 * Stores items that allow to quickly map UUIDs to something else.
2038 * These items are part of the filesystem UUID tree.
2039 * The key is built like this:
2040 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2042 #if BTRFS_UUID_SIZE != 16
2043 #error "UUID items require BTRFS_UUID_SIZE == 16!"
2045 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2046 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2047 * received subvols */
2050 * string items are for debugging. They just store a short string of
2053 #define BTRFS_STRING_ITEM_KEY 253
2056 * Flags for mount options.
2058 * Note: don't forget to add new options to btrfs_show_options()
2060 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2061 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2062 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2063 #define BTRFS_MOUNT_SSD (1 << 3)
2064 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2065 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2066 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2067 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2068 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2069 #define BTRFS_MOUNT_NOSSD (1 << 9)
2070 #define BTRFS_MOUNT_DISCARD (1 << 10)
2071 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2072 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2073 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2074 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2075 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2076 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2077 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2078 #define BTRFS_MOUNT_RECOVERY (1 << 18)
2079 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2080 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2081 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2082 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2083 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2084 #define BTRFS_MOUNT_CHANGE_INODE_CACHE (1 << 24)
2086 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2088 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2089 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2090 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2091 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2093 #define btrfs_set_and_info(root, opt, fmt, args...) \
2095 if (!btrfs_test_opt(root, opt)) \
2096 btrfs_info(root->fs_info, fmt, ##args); \
2097 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2100 #define btrfs_clear_and_info(root, opt, fmt, args...) \
2102 if (btrfs_test_opt(root, opt)) \
2103 btrfs_info(root->fs_info, fmt, ##args); \
2104 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2110 #define BTRFS_INODE_NODATASUM (1 << 0)
2111 #define BTRFS_INODE_NODATACOW (1 << 1)
2112 #define BTRFS_INODE_READONLY (1 << 2)
2113 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2114 #define BTRFS_INODE_PREALLOC (1 << 4)
2115 #define BTRFS_INODE_SYNC (1 << 5)
2116 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2117 #define BTRFS_INODE_APPEND (1 << 7)
2118 #define BTRFS_INODE_NODUMP (1 << 8)
2119 #define BTRFS_INODE_NOATIME (1 << 9)
2120 #define BTRFS_INODE_DIRSYNC (1 << 10)
2121 #define BTRFS_INODE_COMPRESS (1 << 11)
2123 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2125 struct btrfs_map_token {
2126 struct extent_buffer *eb;
2128 unsigned long offset;
2131 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2133 token->kaddr = NULL;
2136 /* some macros to generate set/get funcs for the struct fields. This
2137 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2140 #define le8_to_cpu(v) (v)
2141 #define cpu_to_le8(v) (v)
2144 #define read_eb_member(eb, ptr, type, member, result) ( \
2145 read_extent_buffer(eb, (char *)(result), \
2146 ((unsigned long)(ptr)) + \
2147 offsetof(type, member), \
2148 sizeof(((type *)0)->member)))
2150 #define write_eb_member(eb, ptr, type, member, result) ( \
2151 write_extent_buffer(eb, (char *)(result), \
2152 ((unsigned long)(ptr)) + \
2153 offsetof(type, member), \
2154 sizeof(((type *)0)->member)))
2156 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2157 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2158 unsigned long off, \
2159 struct btrfs_map_token *token); \
2160 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2161 unsigned long off, u##bits val, \
2162 struct btrfs_map_token *token); \
2163 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2164 unsigned long off) \
2166 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2168 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2169 unsigned long off, u##bits val) \
2171 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2174 DECLARE_BTRFS_SETGET_BITS(8)
2175 DECLARE_BTRFS_SETGET_BITS(16)
2176 DECLARE_BTRFS_SETGET_BITS(32)
2177 DECLARE_BTRFS_SETGET_BITS(64)
2179 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2180 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2182 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2183 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2185 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2188 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2189 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2191 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2192 struct btrfs_map_token *token) \
2194 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2195 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2197 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2198 type *s, u##bits val, \
2199 struct btrfs_map_token *token) \
2201 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2202 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2205 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2206 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2208 type *p = page_address(eb->pages[0]); \
2209 u##bits res = le##bits##_to_cpu(p->member); \
2212 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2215 type *p = page_address(eb->pages[0]); \
2216 p->member = cpu_to_le##bits(val); \
2219 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2220 static inline u##bits btrfs_##name(type *s) \
2222 return le##bits##_to_cpu(s->member); \
2224 static inline void btrfs_set_##name(type *s, u##bits val) \
2226 s->member = cpu_to_le##bits(val); \
2229 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2230 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2231 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2232 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2233 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2234 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2236 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2237 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2238 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2239 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2240 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2241 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2243 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2244 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2246 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2248 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2250 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2252 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2254 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2255 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2257 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2259 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2261 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2264 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2266 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2269 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
2271 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
2274 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2275 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2276 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2277 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2278 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2279 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2280 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2281 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2282 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2283 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2284 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2286 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2288 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2291 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2292 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2293 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2295 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2297 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2299 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2301 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2302 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2304 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2306 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2307 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2309 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2312 unsigned long offset = (unsigned long)c;
2313 offset += offsetof(struct btrfs_chunk, stripe);
2314 offset += nr * sizeof(struct btrfs_stripe);
2315 return (struct btrfs_stripe *)offset;
2318 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2320 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2323 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2324 struct btrfs_chunk *c, int nr)
2326 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2329 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2330 struct btrfs_chunk *c, int nr)
2332 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2335 /* struct btrfs_block_group_item */
2336 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2338 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2340 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2341 struct btrfs_block_group_item, chunk_objectid, 64);
2343 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2344 struct btrfs_block_group_item, chunk_objectid, 64);
2345 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2346 struct btrfs_block_group_item, flags, 64);
2347 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2348 struct btrfs_block_group_item, flags, 64);
2350 /* struct btrfs_inode_ref */
2351 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2352 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2354 /* struct btrfs_inode_extref */
2355 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2356 parent_objectid, 64);
2357 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2359 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2361 /* struct btrfs_inode_item */
2362 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2363 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2364 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2365 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2366 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2367 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2368 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2369 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2370 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2371 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2372 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2373 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2374 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2376 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2378 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2380 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2381 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2383 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2385 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2386 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2387 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2388 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2389 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2390 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
2392 static inline struct btrfs_timespec *
2393 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
2395 unsigned long ptr = (unsigned long)inode_item;
2396 ptr += offsetof(struct btrfs_inode_item, atime);
2397 return (struct btrfs_timespec *)ptr;
2400 static inline struct btrfs_timespec *
2401 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
2403 unsigned long ptr = (unsigned long)inode_item;
2404 ptr += offsetof(struct btrfs_inode_item, mtime);
2405 return (struct btrfs_timespec *)ptr;
2408 static inline struct btrfs_timespec *
2409 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
2411 unsigned long ptr = (unsigned long)inode_item;
2412 ptr += offsetof(struct btrfs_inode_item, ctime);
2413 return (struct btrfs_timespec *)ptr;
2416 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2417 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2418 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2419 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
2421 /* struct btrfs_dev_extent */
2422 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2424 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2425 chunk_objectid, 64);
2426 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2428 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2430 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2432 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2433 return (unsigned long)dev + ptr;
2436 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2437 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2439 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2441 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2444 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2446 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2447 struct btrfs_tree_block_info *item,
2448 struct btrfs_disk_key *key)
2450 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2453 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2454 struct btrfs_tree_block_info *item,
2455 struct btrfs_disk_key *key)
2457 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2460 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2462 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2464 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2466 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2469 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2472 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2474 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2477 static inline u32 btrfs_extent_inline_ref_size(int type)
2479 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2480 type == BTRFS_SHARED_BLOCK_REF_KEY)
2481 return sizeof(struct btrfs_extent_inline_ref);
2482 if (type == BTRFS_SHARED_DATA_REF_KEY)
2483 return sizeof(struct btrfs_shared_data_ref) +
2484 sizeof(struct btrfs_extent_inline_ref);
2485 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2486 return sizeof(struct btrfs_extent_data_ref) +
2487 offsetof(struct btrfs_extent_inline_ref, offset);
2492 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2493 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2495 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2496 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2498 /* struct btrfs_node */
2499 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2500 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2501 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2503 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2506 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2509 ptr = offsetof(struct btrfs_node, ptrs) +
2510 sizeof(struct btrfs_key_ptr) * nr;
2511 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2514 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2518 ptr = offsetof(struct btrfs_node, ptrs) +
2519 sizeof(struct btrfs_key_ptr) * nr;
2520 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2523 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2526 ptr = offsetof(struct btrfs_node, ptrs) +
2527 sizeof(struct btrfs_key_ptr) * nr;
2528 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2531 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2535 ptr = offsetof(struct btrfs_node, ptrs) +
2536 sizeof(struct btrfs_key_ptr) * nr;
2537 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2540 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2542 return offsetof(struct btrfs_node, ptrs) +
2543 sizeof(struct btrfs_key_ptr) * nr;
2546 void btrfs_node_key(struct extent_buffer *eb,
2547 struct btrfs_disk_key *disk_key, int nr);
2549 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2550 struct btrfs_disk_key *disk_key, int nr)
2553 ptr = btrfs_node_key_ptr_offset(nr);
2554 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2555 struct btrfs_key_ptr, key, disk_key);
2558 /* struct btrfs_item */
2559 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2560 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2561 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2562 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2564 static inline unsigned long btrfs_item_nr_offset(int nr)
2566 return offsetof(struct btrfs_leaf, items) +
2567 sizeof(struct btrfs_item) * nr;
2570 static inline struct btrfs_item *btrfs_item_nr(int nr)
2572 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2575 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2576 struct btrfs_item *item)
2578 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2581 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2583 return btrfs_item_end(eb, btrfs_item_nr(nr));
2586 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2588 return btrfs_item_offset(eb, btrfs_item_nr(nr));
2591 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2593 return btrfs_item_size(eb, btrfs_item_nr(nr));
2596 static inline void btrfs_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 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2603 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2604 struct btrfs_disk_key *disk_key, int nr)
2606 struct btrfs_item *item = btrfs_item_nr(nr);
2607 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2610 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2613 * struct btrfs_root_ref
2615 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2616 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2617 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2619 /* struct btrfs_dir_item */
2620 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2621 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2622 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2623 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2624 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2625 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2627 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2629 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2632 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2633 struct btrfs_dir_item *item,
2634 struct btrfs_disk_key *key)
2636 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2639 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2640 struct btrfs_dir_item *item,
2641 struct btrfs_disk_key *key)
2643 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2646 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2648 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2650 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2653 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2654 struct btrfs_free_space_header *h,
2655 struct btrfs_disk_key *key)
2657 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2660 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2661 struct btrfs_free_space_header *h,
2662 struct btrfs_disk_key *key)
2664 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2667 /* struct btrfs_disk_key */
2668 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2670 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2671 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2673 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2674 struct btrfs_disk_key *disk)
2676 cpu->offset = le64_to_cpu(disk->offset);
2677 cpu->type = disk->type;
2678 cpu->objectid = le64_to_cpu(disk->objectid);
2681 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2682 struct btrfs_key *cpu)
2684 disk->offset = cpu_to_le64(cpu->offset);
2685 disk->type = cpu->type;
2686 disk->objectid = cpu_to_le64(cpu->objectid);
2689 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2690 struct btrfs_key *key, int nr)
2692 struct btrfs_disk_key disk_key;
2693 btrfs_node_key(eb, &disk_key, nr);
2694 btrfs_disk_key_to_cpu(key, &disk_key);
2697 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2698 struct btrfs_key *key, int nr)
2700 struct btrfs_disk_key disk_key;
2701 btrfs_item_key(eb, &disk_key, nr);
2702 btrfs_disk_key_to_cpu(key, &disk_key);
2705 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2706 struct btrfs_dir_item *item,
2707 struct btrfs_key *key)
2709 struct btrfs_disk_key disk_key;
2710 btrfs_dir_item_key(eb, item, &disk_key);
2711 btrfs_disk_key_to_cpu(key, &disk_key);
2715 static inline u8 btrfs_key_type(struct btrfs_key *key)
2720 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2725 /* struct btrfs_header */
2726 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2727 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2729 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2730 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2731 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2732 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2733 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2735 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2736 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2738 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2740 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2742 return (btrfs_header_flags(eb) & flag) == flag;
2745 static inline int btrfs_set_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_clear_header_flag(struct extent_buffer *eb, u64 flag)
2754 u64 flags = btrfs_header_flags(eb);
2755 btrfs_set_header_flags(eb, flags & ~flag);
2756 return (flags & flag) == flag;
2759 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2761 u64 flags = btrfs_header_flags(eb);
2762 return flags >> BTRFS_BACKREF_REV_SHIFT;
2765 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2768 u64 flags = btrfs_header_flags(eb);
2769 flags &= ~BTRFS_BACKREF_REV_MASK;
2770 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2771 btrfs_set_header_flags(eb, flags);
2774 static inline unsigned long btrfs_header_fsid(void)
2776 return offsetof(struct btrfs_header, fsid);
2779 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2781 return offsetof(struct btrfs_header, chunk_tree_uuid);
2784 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2786 return btrfs_header_level(eb) == 0;
2789 /* struct btrfs_root_item */
2790 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2792 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2793 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2794 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2796 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2798 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2799 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2800 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2801 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2802 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2803 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2804 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2805 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2807 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2809 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2811 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2813 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2815 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2818 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2820 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2823 static inline bool btrfs_root_dead(struct btrfs_root *root)
2825 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2828 /* struct btrfs_root_backup */
2829 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2831 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2833 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2834 tree_root_level, 8);
2836 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2838 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2839 chunk_root_gen, 64);
2840 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2841 chunk_root_level, 8);
2843 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2845 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2846 extent_root_gen, 64);
2847 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2848 extent_root_level, 8);
2850 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2852 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2854 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2857 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2859 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2861 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2864 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2866 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2868 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2869 csum_root_level, 8);
2870 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2872 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2874 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2877 /* struct btrfs_balance_item */
2878 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2880 static inline void btrfs_balance_data(struct extent_buffer *eb,
2881 struct btrfs_balance_item *bi,
2882 struct btrfs_disk_balance_args *ba)
2884 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2887 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2888 struct btrfs_balance_item *bi,
2889 struct btrfs_disk_balance_args *ba)
2891 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2894 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2895 struct btrfs_balance_item *bi,
2896 struct btrfs_disk_balance_args *ba)
2898 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2901 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2902 struct btrfs_balance_item *bi,
2903 struct btrfs_disk_balance_args *ba)
2905 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2908 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2909 struct btrfs_balance_item *bi,
2910 struct btrfs_disk_balance_args *ba)
2912 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2915 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2916 struct btrfs_balance_item *bi,
2917 struct btrfs_disk_balance_args *ba)
2919 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2923 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2924 struct btrfs_disk_balance_args *disk)
2926 memset(cpu, 0, sizeof(*cpu));
2928 cpu->profiles = le64_to_cpu(disk->profiles);
2929 cpu->usage = le64_to_cpu(disk->usage);
2930 cpu->devid = le64_to_cpu(disk->devid);
2931 cpu->pstart = le64_to_cpu(disk->pstart);
2932 cpu->pend = le64_to_cpu(disk->pend);
2933 cpu->vstart = le64_to_cpu(disk->vstart);
2934 cpu->vend = le64_to_cpu(disk->vend);
2935 cpu->target = le64_to_cpu(disk->target);
2936 cpu->flags = le64_to_cpu(disk->flags);
2937 cpu->limit = le64_to_cpu(disk->limit);
2941 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2942 struct btrfs_balance_args *cpu)
2944 memset(disk, 0, sizeof(*disk));
2946 disk->profiles = cpu_to_le64(cpu->profiles);
2947 disk->usage = cpu_to_le64(cpu->usage);
2948 disk->devid = cpu_to_le64(cpu->devid);
2949 disk->pstart = cpu_to_le64(cpu->pstart);
2950 disk->pend = cpu_to_le64(cpu->pend);
2951 disk->vstart = cpu_to_le64(cpu->vstart);
2952 disk->vend = cpu_to_le64(cpu->vend);
2953 disk->target = cpu_to_le64(cpu->target);
2954 disk->flags = cpu_to_le64(cpu->flags);
2955 disk->limit = cpu_to_le64(cpu->limit);
2958 /* struct btrfs_super_block */
2959 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2960 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2961 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2963 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2964 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2965 struct btrfs_super_block, sys_chunk_array_size, 32);
2966 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2967 struct btrfs_super_block, chunk_root_generation, 64);
2968 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2970 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2972 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2973 chunk_root_level, 8);
2974 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2976 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2977 log_root_transid, 64);
2978 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2980 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2982 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2984 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2986 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2988 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2990 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2991 root_dir_objectid, 64);
2992 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2994 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2996 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2997 compat_ro_flags, 64);
2998 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2999 incompat_flags, 64);
3000 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
3002 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
3003 cache_generation, 64);
3004 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
3005 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
3006 uuid_tree_generation, 64);
3008 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
3010 u16 t = btrfs_super_csum_type(s);
3012 * csum type is validated at mount time
3014 return btrfs_csum_sizes[t];
3017 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
3019 return offsetof(struct btrfs_leaf, items);
3022 /* struct btrfs_file_extent_item */
3023 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
3024 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
3025 struct btrfs_file_extent_item, disk_bytenr, 64);
3026 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
3027 struct btrfs_file_extent_item, offset, 64);
3028 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
3029 struct btrfs_file_extent_item, generation, 64);
3030 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
3031 struct btrfs_file_extent_item, num_bytes, 64);
3032 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
3033 struct btrfs_file_extent_item, disk_num_bytes, 64);
3034 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
3035 struct btrfs_file_extent_item, compression, 8);
3037 static inline unsigned long
3038 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
3040 unsigned long offset = (unsigned long)e;
3041 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
3045 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
3047 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
3050 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
3052 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
3054 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
3055 disk_num_bytes, 64);
3056 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
3058 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
3060 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
3062 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
3064 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
3066 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
3067 other_encoding, 16);
3070 * this returns the number of bytes used by the item on disk, minus the
3071 * size of any extent headers. If a file is compressed on disk, this is
3072 * the compressed size
3074 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
3075 struct btrfs_item *e)
3077 unsigned long offset;
3078 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
3079 return btrfs_item_size(eb, e) - offset;
3082 /* this returns the number of file bytes represented by the inline item.
3083 * If an item is compressed, this is the uncompressed size
3085 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3087 struct btrfs_file_extent_item *fi)
3089 struct btrfs_map_token token;
3091 btrfs_init_map_token(&token);
3093 * return the space used on disk if this item isn't
3094 * compressed or encoded
3096 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3097 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3098 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3099 return btrfs_file_extent_inline_item_len(eb,
3100 btrfs_item_nr(slot));
3103 /* otherwise use the ram bytes field */
3104 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3108 /* btrfs_dev_stats_item */
3109 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3110 struct btrfs_dev_stats_item *ptr,
3115 read_extent_buffer(eb, &val,
3116 offsetof(struct btrfs_dev_stats_item, values) +
3117 ((unsigned long)ptr) + (index * sizeof(u64)),
3122 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3123 struct btrfs_dev_stats_item *ptr,
3126 write_extent_buffer(eb, &val,
3127 offsetof(struct btrfs_dev_stats_item, values) +
3128 ((unsigned long)ptr) + (index * sizeof(u64)),
3132 /* btrfs_qgroup_status_item */
3133 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3135 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3137 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3139 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3142 /* btrfs_qgroup_info_item */
3143 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3145 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3146 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3148 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3149 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3152 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3153 struct btrfs_qgroup_info_item, generation, 64);
3154 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3156 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3157 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3158 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3160 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3161 struct btrfs_qgroup_info_item, excl_cmpr, 64);
3163 /* btrfs_qgroup_limit_item */
3164 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3166 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3168 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3170 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3172 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3175 /* btrfs_dev_replace_item */
3176 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3177 struct btrfs_dev_replace_item, src_devid, 64);
3178 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3179 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3181 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3183 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3185 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3187 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3188 num_write_errors, 64);
3189 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3190 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3192 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3194 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3197 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3198 struct btrfs_dev_replace_item, src_devid, 64);
3199 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3200 struct btrfs_dev_replace_item,
3201 cont_reading_from_srcdev_mode, 64);
3202 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3203 struct btrfs_dev_replace_item, replace_state, 64);
3204 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3205 struct btrfs_dev_replace_item, time_started, 64);
3206 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3207 struct btrfs_dev_replace_item, time_stopped, 64);
3208 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3209 struct btrfs_dev_replace_item, num_write_errors, 64);
3210 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3211 struct btrfs_dev_replace_item,
3212 num_uncorrectable_read_errors, 64);
3213 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3214 struct btrfs_dev_replace_item, cursor_left, 64);
3215 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3216 struct btrfs_dev_replace_item, cursor_right, 64);
3218 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
3220 return sb->s_fs_info;
3223 /* helper function to cast into the data area of the leaf. */
3224 #define btrfs_item_ptr(leaf, slot, type) \
3225 ((type *)(btrfs_leaf_data(leaf) + \
3226 btrfs_item_offset_nr(leaf, slot)))
3228 #define btrfs_item_ptr_offset(leaf, slot) \
3229 ((unsigned long)(btrfs_leaf_data(leaf) + \
3230 btrfs_item_offset_nr(leaf, slot)))
3232 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3234 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3235 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3238 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3240 return mapping_gfp_mask(mapping) & ~__GFP_FS;
3244 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3247 return (root->nodesize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3252 * Doing a truncate won't result in new nodes or leaves, just what we need for
3255 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3258 return root->nodesize * BTRFS_MAX_LEVEL * num_items;
3261 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3262 struct btrfs_root *root);
3263 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3264 struct btrfs_root *root);
3265 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3266 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3267 struct btrfs_root *root, unsigned long count);
3268 int btrfs_async_run_delayed_refs(struct btrfs_root *root,
3269 unsigned long count, int wait);
3270 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
3271 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3272 struct btrfs_root *root, u64 bytenr,
3273 u64 offset, int metadata, u64 *refs, u64 *flags);
3274 int btrfs_pin_extent(struct btrfs_root *root,
3275 u64 bytenr, u64 num, int reserved);
3276 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3277 u64 bytenr, u64 num_bytes);
3278 int btrfs_exclude_logged_extents(struct btrfs_root *root,
3279 struct extent_buffer *eb);
3280 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3281 struct btrfs_root *root,
3282 u64 objectid, u64 offset, u64 bytenr);
3283 struct btrfs_block_group_cache *btrfs_lookup_block_group(
3284 struct btrfs_fs_info *info,
3286 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3287 int get_block_group_index(struct btrfs_block_group_cache *cache);
3288 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
3289 struct btrfs_root *root, u32 blocksize,
3290 u64 parent, u64 root_objectid,
3291 struct btrfs_disk_key *key, int level,
3292 u64 hint, u64 empty_size);
3293 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3294 struct btrfs_root *root,
3295 struct extent_buffer *buf,
3296 u64 parent, int last_ref);
3297 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3298 struct btrfs_root *root,
3299 u64 root_objectid, u64 owner,
3300 u64 offset, struct btrfs_key *ins);
3301 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3302 struct btrfs_root *root,
3303 u64 root_objectid, u64 owner, u64 offset,
3304 struct btrfs_key *ins);
3305 int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3306 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3307 struct btrfs_key *ins, int is_data, int delalloc);
3308 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3309 struct extent_buffer *buf, int full_backref);
3310 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3311 struct extent_buffer *buf, int full_backref);
3312 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3313 struct btrfs_root *root,
3314 u64 bytenr, u64 num_bytes, u64 flags,
3315 int level, int is_data);
3316 int btrfs_free_extent(struct btrfs_trans_handle *trans,
3317 struct btrfs_root *root,
3318 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3319 u64 owner, u64 offset, int no_quota);
3321 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 bio *bio, u64 logical_offset);
3723 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3724 struct btrfs_root *root,
3725 u64 objectid, u64 pos,
3726 u64 disk_offset, u64 disk_num_bytes,
3727 u64 num_bytes, u64 offset, u64 ram_bytes,
3728 u8 compression, u8 encryption, u16 other_encoding);
3729 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3730 struct btrfs_root *root,
3731 struct btrfs_path *path, u64 objectid,
3732 u64 bytenr, int mod);
3733 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3734 struct btrfs_root *root,
3735 struct btrfs_ordered_sum *sums);
3736 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3737 struct bio *bio, u64 file_start, int contig);
3738 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3739 struct list_head *list, int search_commit);
3740 void btrfs_extent_item_to_extent_map(struct inode *inode,
3741 const struct btrfs_path *path,
3742 struct btrfs_file_extent_item *fi,
3743 const bool new_inline,
3744 struct extent_map *em);
3747 struct btrfs_delalloc_work {
3748 struct inode *inode;
3751 struct completion completion;
3752 struct list_head list;
3753 struct btrfs_work work;
3756 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3757 int wait, int delay_iput);
3758 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3760 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3761 size_t pg_offset, u64 start, u64 len,
3763 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3764 u64 *orig_start, u64 *orig_block_len,
3767 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3768 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3769 #define ClearPageChecked ClearPageFsMisc
3770 #define SetPageChecked SetPageFsMisc
3771 #define PageChecked PageFsMisc
3774 /* This forces readahead on a given range of bytes in an inode */
3775 static inline void btrfs_force_ra(struct address_space *mapping,
3776 struct file_ra_state *ra, struct file *file,
3777 pgoff_t offset, unsigned long req_size)
3779 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3782 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3783 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3784 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3785 struct btrfs_root *root,
3786 struct inode *dir, struct inode *inode,
3787 const char *name, int name_len);
3788 int btrfs_add_link(struct btrfs_trans_handle *trans,
3789 struct inode *parent_inode, struct inode *inode,
3790 const char *name, int name_len, int add_backref, u64 index);
3791 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3792 struct btrfs_root *root,
3793 struct inode *dir, u64 objectid,
3794 const char *name, int name_len);
3795 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3797 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3798 struct btrfs_root *root,
3799 struct inode *inode, u64 new_size,
3802 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3803 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3805 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3806 struct extent_state **cached_state);
3807 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3808 struct btrfs_root *new_root,
3809 struct btrfs_root *parent_root,
3811 int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3812 size_t size, struct bio *bio,
3813 unsigned long bio_flags);
3814 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3815 int btrfs_readpage(struct file *file, struct page *page);
3816 void btrfs_evict_inode(struct inode *inode);
3817 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3818 struct inode *btrfs_alloc_inode(struct super_block *sb);
3819 void btrfs_destroy_inode(struct inode *inode);
3820 int btrfs_drop_inode(struct inode *inode);
3821 int btrfs_init_cachep(void);
3822 void btrfs_destroy_cachep(void);
3823 long btrfs_ioctl_trans_end(struct file *file);
3824 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3825 struct btrfs_root *root, int *was_new);
3826 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3827 size_t pg_offset, u64 start, u64 end,
3829 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3830 struct btrfs_root *root,
3831 struct inode *inode);
3832 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3833 struct btrfs_root *root, struct inode *inode);
3834 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3835 int btrfs_orphan_cleanup(struct btrfs_root *root);
3836 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3837 struct btrfs_root *root);
3838 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3839 void btrfs_invalidate_inodes(struct btrfs_root *root);
3840 void btrfs_add_delayed_iput(struct inode *inode);
3841 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3842 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3843 u64 start, u64 num_bytes, u64 min_size,
3844 loff_t actual_len, u64 *alloc_hint);
3845 int btrfs_prealloc_file_range_trans(struct inode *inode,
3846 struct btrfs_trans_handle *trans, int mode,
3847 u64 start, u64 num_bytes, u64 min_size,
3848 loff_t actual_len, u64 *alloc_hint);
3849 extern const struct dentry_operations btrfs_dentry_operations;
3852 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3853 void btrfs_update_iflags(struct inode *inode);
3854 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3855 int btrfs_is_empty_uuid(u8 *uuid);
3856 int btrfs_defrag_file(struct inode *inode, struct file *file,
3857 struct btrfs_ioctl_defrag_range_args *range,
3858 u64 newer_than, unsigned long max_pages);
3859 void btrfs_get_block_group_info(struct list_head *groups_list,
3860 struct btrfs_ioctl_space_info *space);
3861 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3862 struct btrfs_ioctl_balance_args *bargs);
3866 int btrfs_auto_defrag_init(void);
3867 void btrfs_auto_defrag_exit(void);
3868 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3869 struct inode *inode);
3870 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3871 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3872 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3873 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3875 extern const struct file_operations btrfs_file_operations;
3876 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3877 struct btrfs_root *root, struct inode *inode,
3878 struct btrfs_path *path, u64 start, u64 end,
3879 u64 *drop_end, int drop_cache,
3881 u32 extent_item_size,
3883 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3884 struct btrfs_root *root, struct inode *inode, u64 start,
3885 u64 end, int drop_cache);
3886 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3887 struct inode *inode, u64 start, u64 end);
3888 int btrfs_release_file(struct inode *inode, struct file *file);
3889 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3890 struct page **pages, size_t num_pages,
3891 loff_t pos, size_t write_bytes,
3892 struct extent_state **cached);
3895 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3896 struct btrfs_root *root);
3899 int btrfs_init_sysfs(void);
3900 void btrfs_exit_sysfs(void);
3901 int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info);
3902 void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info);
3905 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3908 int btrfs_parse_options(struct btrfs_root *root, char *options);
3909 int btrfs_sync_fs(struct super_block *sb, int wait);
3911 #ifdef CONFIG_PRINTK
3913 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3915 static inline __printf(2, 3)
3916 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3921 #define btrfs_emerg(fs_info, fmt, args...) \
3922 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3923 #define btrfs_alert(fs_info, fmt, args...) \
3924 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3925 #define btrfs_crit(fs_info, fmt, args...) \
3926 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3927 #define btrfs_err(fs_info, fmt, args...) \
3928 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3929 #define btrfs_warn(fs_info, fmt, args...) \
3930 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3931 #define btrfs_notice(fs_info, fmt, args...) \
3932 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3933 #define btrfs_info(fs_info, fmt, args...) \
3934 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3937 #define btrfs_debug(fs_info, fmt, args...) \
3938 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3940 #define btrfs_debug(fs_info, fmt, args...) \
3941 no_printk(KERN_DEBUG fmt, ##args)
3944 #ifdef CONFIG_BTRFS_ASSERT
3946 static inline void assfail(char *expr, char *file, int line)
3948 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3953 #define ASSERT(expr) \
3954 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3956 #define ASSERT(expr) ((void)0)
3959 #define btrfs_assert()
3961 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3962 unsigned int line, int errno, const char *fmt, ...);
3965 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3966 struct btrfs_root *root, const char *function,
3967 unsigned int line, int errno);
3969 #define btrfs_set_fs_incompat(__fs_info, opt) \
3970 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3972 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3975 struct btrfs_super_block *disk_super;
3978 disk_super = fs_info->super_copy;
3979 features = btrfs_super_incompat_flags(disk_super);
3980 if (!(features & flag)) {
3981 spin_lock(&fs_info->super_lock);
3982 features = btrfs_super_incompat_flags(disk_super);
3983 if (!(features & flag)) {
3985 btrfs_set_super_incompat_flags(disk_super, features);
3986 btrfs_info(fs_info, "setting %llu feature flag",
3989 spin_unlock(&fs_info->super_lock);
3993 #define btrfs_fs_incompat(fs_info, opt) \
3994 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3996 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3998 struct btrfs_super_block *disk_super;
3999 disk_super = fs_info->super_copy;
4000 return !!(btrfs_super_incompat_flags(disk_super) & flag);
4004 * Call btrfs_abort_transaction as early as possible when an error condition is
4005 * detected, that way the exact line number is reported.
4008 #define btrfs_abort_transaction(trans, root, errno) \
4010 __btrfs_abort_transaction(trans, root, __func__, \
4014 #define btrfs_std_error(fs_info, errno) \
4017 __btrfs_std_error((fs_info), __func__, \
4018 __LINE__, (errno), NULL); \
4021 #define btrfs_error(fs_info, errno, fmt, args...) \
4023 __btrfs_std_error((fs_info), __func__, __LINE__, \
4024 (errno), fmt, ##args); \
4028 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
4029 unsigned int line, int errno, const char *fmt, ...);
4032 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4033 * will panic(). Otherwise we BUG() here.
4035 #define btrfs_panic(fs_info, errno, fmt, args...) \
4037 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4042 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4043 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
4044 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
4045 int btrfs_init_acl(struct btrfs_trans_handle *trans,
4046 struct inode *inode, struct inode *dir);
4048 #define btrfs_get_acl NULL
4049 #define btrfs_set_acl NULL
4050 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
4051 struct inode *inode, struct inode *dir)
4058 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
4059 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
4060 struct btrfs_root *root);
4061 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
4062 struct btrfs_root *root);
4063 int btrfs_recover_relocation(struct btrfs_root *root);
4064 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
4065 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
4066 struct btrfs_root *root, struct extent_buffer *buf,
4067 struct extent_buffer *cow);
4068 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
4069 struct btrfs_pending_snapshot *pending,
4070 u64 *bytes_to_reserve);
4071 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4072 struct btrfs_pending_snapshot *pending);
4075 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
4076 u64 end, struct btrfs_scrub_progress *progress,
4077 int readonly, int is_dev_replace);
4078 void btrfs_scrub_pause(struct btrfs_root *root);
4079 void btrfs_scrub_continue(struct btrfs_root *root);
4080 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4081 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4082 struct btrfs_device *dev);
4083 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4084 struct btrfs_scrub_progress *progress);
4087 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
4088 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
4089 void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info);
4092 struct reada_control {
4093 struct btrfs_root *root; /* tree to prefetch */
4094 struct btrfs_key key_start;
4095 struct btrfs_key key_end; /* exclusive */
4098 wait_queue_head_t wait;
4100 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4101 struct btrfs_key *start, struct btrfs_key *end);
4102 int btrfs_reada_wait(void *handle);
4103 void btrfs_reada_detach(void *handle);
4104 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
4105 u64 start, int err);
4107 static inline int is_fstree(u64 rootid)
4109 if (rootid == BTRFS_FS_TREE_OBJECTID ||
4110 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
4115 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4117 return signal_pending(current);
4120 /* Sanity test specific functions */
4121 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4122 void btrfs_test_destroy_inode(struct inode *inode);
4123 int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid,
4124 u64 rfer, u64 excl);