2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include <linux/pagemap.h>
34 #include "extent_io.h"
35 #include "extent_map.h"
36 #include "async-thread.h"
39 struct btrfs_trans_handle;
40 struct btrfs_transaction;
41 struct btrfs_pending_snapshot;
42 extern struct kmem_cache *btrfs_trans_handle_cachep;
43 extern struct kmem_cache *btrfs_transaction_cachep;
44 extern struct kmem_cache *btrfs_bit_radix_cachep;
45 extern struct kmem_cache *btrfs_path_cachep;
46 extern struct kmem_cache *btrfs_free_space_cachep;
47 struct btrfs_ordered_sum;
49 #define BTRFS_MAGIC "_BHRfS_M"
51 #define BTRFS_MAX_MIRRORS 2
53 #define BTRFS_MAX_LEVEL 8
55 #define BTRFS_COMPAT_EXTENT_TREE_V0
58 * files bigger than this get some pre-flushing when they are added
59 * to the ordered operations list. That way we limit the total
60 * work done by the commit
62 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
64 /* holds pointers to all of the tree roots */
65 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
67 /* stores information about which extents are in use, and reference counts */
68 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
71 * chunk tree stores translations from logical -> physical block numbering
72 * the super block points to the chunk tree
74 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
77 * stores information about which areas of a given device are in use.
78 * one per device. The tree of tree roots points to the device tree
80 #define BTRFS_DEV_TREE_OBJECTID 4ULL
82 /* one per subvolume, storing files and directories */
83 #define BTRFS_FS_TREE_OBJECTID 5ULL
85 /* directory objectid inside the root tree */
86 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
88 /* holds checksums of all the data extents */
89 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
91 /* for storing balance parameters in the root tree */
92 #define BTRFS_BALANCE_OBJECTID -4ULL
94 /* holds quota configuration and tracking */
95 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
97 /* orhpan objectid for tracking unlinked/truncated files */
98 #define BTRFS_ORPHAN_OBJECTID -5ULL
100 /* does write ahead logging to speed up fsyncs */
101 #define BTRFS_TREE_LOG_OBJECTID -6ULL
102 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
104 /* for space balancing */
105 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
106 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
109 * extent checksums all have this objectid
110 * this allows them to share the logging tree
113 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
115 /* For storing free space cache */
116 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
119 * The inode number assigned to the special inode for storing
122 #define BTRFS_FREE_INO_OBJECTID -12ULL
124 /* dummy objectid represents multiple objectids */
125 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
128 * All files have objectids in this range.
130 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
131 #define BTRFS_LAST_FREE_OBJECTID -256ULL
132 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
136 * the device items go into the chunk tree. The key is in the form
137 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
139 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
141 #define BTRFS_BTREE_INODE_OBJECTID 1
143 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
146 * the max metadata block size. This limit is somewhat artificial,
147 * but the memmove costs go through the roof for larger blocks.
149 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
152 * we can actually store much bigger names, but lets not confuse the rest
155 #define BTRFS_NAME_LEN 255
158 * Theoretical limit is larger, but we keep this down to a sane
159 * value. That should limit greatly the possibility of collisions on
162 #define BTRFS_LINK_MAX 65535U
164 /* 32 bytes in various csum fields */
165 #define BTRFS_CSUM_SIZE 32
168 #define BTRFS_CSUM_TYPE_CRC32 0
170 static int btrfs_csum_sizes[] = { 4, 0 };
172 /* four bytes for CRC32 */
173 #define BTRFS_EMPTY_DIR_SIZE 0
175 #define BTRFS_FT_UNKNOWN 0
176 #define BTRFS_FT_REG_FILE 1
177 #define BTRFS_FT_DIR 2
178 #define BTRFS_FT_CHRDEV 3
179 #define BTRFS_FT_BLKDEV 4
180 #define BTRFS_FT_FIFO 5
181 #define BTRFS_FT_SOCK 6
182 #define BTRFS_FT_SYMLINK 7
183 #define BTRFS_FT_XATTR 8
184 #define BTRFS_FT_MAX 9
186 /* ioprio of readahead is set to idle */
187 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
190 * The key defines the order in the tree, and so it also defines (optimal)
193 * objectid corresponds to the inode number.
195 * type tells us things about the object, and is a kind of stream selector.
196 * so for a given inode, keys with type of 1 might refer to the inode data,
197 * type of 2 may point to file data in the btree and type == 3 may point to
200 * offset is the starting byte offset for this key in the stream.
202 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
203 * in cpu native order. Otherwise they are identical and their sizes
204 * should be the same (ie both packed)
206 struct btrfs_disk_key {
210 } __attribute__ ((__packed__));
216 } __attribute__ ((__packed__));
218 struct btrfs_mapping_tree {
219 struct extent_map_tree map_tree;
222 struct btrfs_dev_item {
223 /* the internal btrfs device id */
226 /* size of the device */
232 /* optimal io alignment for this device */
235 /* optimal io width for this device */
238 /* minimal io size for this device */
241 /* type and info about this device */
244 /* expected generation for this device */
248 * starting byte of this partition on the device,
249 * to allow for stripe alignment in the future
253 /* grouping information for allocation decisions */
256 /* seek speed 0-100 where 100 is fastest */
259 /* bandwidth 0-100 where 100 is fastest */
262 /* btrfs generated uuid for this device */
263 u8 uuid[BTRFS_UUID_SIZE];
265 /* uuid of FS who owns this device */
266 u8 fsid[BTRFS_UUID_SIZE];
267 } __attribute__ ((__packed__));
269 struct btrfs_stripe {
272 u8 dev_uuid[BTRFS_UUID_SIZE];
273 } __attribute__ ((__packed__));
276 /* size of this chunk in bytes */
279 /* objectid of the root referencing this chunk */
285 /* optimal io alignment for this chunk */
288 /* optimal io width for this chunk */
291 /* minimal io size for this chunk */
294 /* 2^16 stripes is quite a lot, a second limit is the size of a single
299 /* sub stripes only matter for raid10 */
301 struct btrfs_stripe stripe;
302 /* additional stripes go here */
303 } __attribute__ ((__packed__));
305 #define BTRFS_FREE_SPACE_EXTENT 1
306 #define BTRFS_FREE_SPACE_BITMAP 2
308 struct btrfs_free_space_entry {
312 } __attribute__ ((__packed__));
314 struct btrfs_free_space_header {
315 struct btrfs_disk_key location;
319 } __attribute__ ((__packed__));
321 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
323 BUG_ON(num_stripes == 0);
324 return sizeof(struct btrfs_chunk) +
325 sizeof(struct btrfs_stripe) * (num_stripes - 1);
328 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
329 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
335 /* Errors detected */
336 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
338 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
339 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
341 #define BTRFS_BACKREF_REV_MAX 256
342 #define BTRFS_BACKREF_REV_SHIFT 56
343 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
344 BTRFS_BACKREF_REV_SHIFT)
346 #define BTRFS_OLD_BACKREF_REV 0
347 #define BTRFS_MIXED_BACKREF_REV 1
350 * every tree block (leaf or node) starts with this header.
352 struct btrfs_header {
353 /* these first four must match the super block */
354 u8 csum[BTRFS_CSUM_SIZE];
355 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
356 __le64 bytenr; /* which block this node is supposed to live in */
359 /* allowed to be different from the super from here on down */
360 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
365 } __attribute__ ((__packed__));
367 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
368 sizeof(struct btrfs_header)) / \
369 sizeof(struct btrfs_key_ptr))
370 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
371 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
372 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
373 sizeof(struct btrfs_item) - \
374 sizeof(struct btrfs_file_extent_item))
375 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
376 sizeof(struct btrfs_item) -\
377 sizeof(struct btrfs_dir_item))
381 * this is a very generous portion of the super block, giving us
382 * room to translate 14 chunks with 3 stripes each.
384 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
385 #define BTRFS_LABEL_SIZE 256
388 * just in case we somehow lose the roots and are not able to mount,
389 * we store an array of the roots from previous transactions
392 #define BTRFS_NUM_BACKUP_ROOTS 4
393 struct btrfs_root_backup {
395 __le64 tree_root_gen;
398 __le64 chunk_root_gen;
401 __le64 extent_root_gen;
410 __le64 csum_root_gen;
420 u8 extent_root_level;
424 /* future and to align */
426 } __attribute__ ((__packed__));
429 * the super block basically lists the main trees of the FS
430 * it currently lacks any block count etc etc
432 struct btrfs_super_block {
433 u8 csum[BTRFS_CSUM_SIZE];
434 /* the first 4 fields must match struct btrfs_header */
435 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
436 __le64 bytenr; /* this block number */
439 /* allowed to be different from the btrfs_header from here own down */
446 /* this will help find the new super based on the log root */
447 __le64 log_root_transid;
450 __le64 root_dir_objectid;
456 __le32 sys_chunk_array_size;
457 __le64 chunk_root_generation;
459 __le64 compat_ro_flags;
460 __le64 incompat_flags;
465 struct btrfs_dev_item dev_item;
467 char label[BTRFS_LABEL_SIZE];
469 __le64 cache_generation;
471 /* future expansion */
473 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
474 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
475 } __attribute__ ((__packed__));
478 * Compat flags that we support. If any incompat flags are set other than the
479 * ones specified below then we will fail to mount
481 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
482 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
483 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
484 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
486 * some patches floated around with a second compression method
487 * lets save that incompat here for when they do get in
488 * Note we don't actually support it, we're just reserving the
491 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
494 * older kernels tried to do bigger metadata blocks, but the
495 * code was pretty buggy. Lets not let them try anymore.
497 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
499 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
501 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
502 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
503 #define BTRFS_FEATURE_INCOMPAT_SUPP \
504 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
505 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
506 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
507 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
508 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
509 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
512 * A leaf is full of items. offset and size tell us where to find
513 * the item in the leaf (relative to the start of the data area)
516 struct btrfs_disk_key key;
519 } __attribute__ ((__packed__));
522 * leaves have an item area and a data area:
523 * [item0, item1....itemN] [free space] [dataN...data1, data0]
525 * The data is separate from the items to get the keys closer together
529 struct btrfs_header header;
530 struct btrfs_item items[];
531 } __attribute__ ((__packed__));
534 * all non-leaf blocks are nodes, they hold only keys and pointers to
537 struct btrfs_key_ptr {
538 struct btrfs_disk_key key;
541 } __attribute__ ((__packed__));
544 struct btrfs_header header;
545 struct btrfs_key_ptr ptrs[];
546 } __attribute__ ((__packed__));
549 * btrfs_paths remember the path taken from the root down to the leaf.
550 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
551 * to any other levels that are present.
553 * The slots array records the index of the item or block pointer
554 * used while walking the tree.
557 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
558 int slots[BTRFS_MAX_LEVEL];
559 /* if there is real range locking, this locks field will change */
560 int locks[BTRFS_MAX_LEVEL];
562 /* keep some upper locks as we walk down */
566 * set by btrfs_split_item, tells search_slot to keep all locks
567 * and to force calls to keep space in the nodes
569 unsigned int search_for_split:1;
570 unsigned int keep_locks:1;
571 unsigned int skip_locking:1;
572 unsigned int leave_spinning:1;
573 unsigned int search_commit_root:1;
574 unsigned int shecantgoanyfarthercapt:1;
578 * items in the extent btree are used to record the objectid of the
579 * owner of the block and the number of references
582 struct btrfs_extent_item {
586 } __attribute__ ((__packed__));
588 struct btrfs_extent_item_v0 {
590 } __attribute__ ((__packed__));
592 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
593 sizeof(struct btrfs_item))
595 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
596 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
598 /* following flags only apply to tree blocks */
600 /* use full backrefs for extent pointers in the block */
601 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
604 * this flag is only used internally by scrub and may be changed at any time
605 * it is only declared here to avoid collisions
607 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
609 struct btrfs_tree_block_info {
610 struct btrfs_disk_key key;
612 } __attribute__ ((__packed__));
614 struct btrfs_extent_data_ref {
619 } __attribute__ ((__packed__));
621 struct btrfs_shared_data_ref {
623 } __attribute__ ((__packed__));
625 struct btrfs_extent_inline_ref {
628 } __attribute__ ((__packed__));
630 /* old style backrefs item */
631 struct btrfs_extent_ref_v0 {
636 } __attribute__ ((__packed__));
639 /* dev extents record free space on individual devices. The owner
640 * field points back to the chunk allocation mapping tree that allocated
641 * the extent. The chunk tree uuid field is a way to double check the owner
643 struct btrfs_dev_extent {
645 __le64 chunk_objectid;
648 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
649 } __attribute__ ((__packed__));
651 struct btrfs_inode_ref {
655 } __attribute__ ((__packed__));
657 struct btrfs_inode_extref {
658 __le64 parent_objectid;
663 } __attribute__ ((__packed__));
665 struct btrfs_timespec {
668 } __attribute__ ((__packed__));
670 enum btrfs_compression_type {
671 BTRFS_COMPRESS_NONE = 0,
672 BTRFS_COMPRESS_ZLIB = 1,
673 BTRFS_COMPRESS_LZO = 2,
674 BTRFS_COMPRESS_TYPES = 2,
675 BTRFS_COMPRESS_LAST = 3,
678 struct btrfs_inode_item {
679 /* nfs style generation number */
681 /* transid that last touched this inode */
693 /* modification sequence number for NFS */
697 * a little future expansion, for more than this we can
698 * just grow the inode item and version it
701 struct btrfs_timespec atime;
702 struct btrfs_timespec ctime;
703 struct btrfs_timespec mtime;
704 struct btrfs_timespec otime;
705 } __attribute__ ((__packed__));
707 struct btrfs_dir_log_item {
709 } __attribute__ ((__packed__));
711 struct btrfs_dir_item {
712 struct btrfs_disk_key location;
717 } __attribute__ ((__packed__));
719 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
721 struct btrfs_root_item {
722 struct btrfs_inode_item inode;
728 __le64 last_snapshot;
731 struct btrfs_disk_key drop_progress;
736 * The following fields appear after subvol_uuids+subvol_times
741 * This generation number is used to test if the new fields are valid
742 * and up to date while reading the root item. Everytime the root item
743 * is written out, the "generation" field is copied into this field. If
744 * anyone ever mounted the fs with an older kernel, we will have
745 * mismatching generation values here and thus must invalidate the
746 * new fields. See btrfs_update_root and btrfs_find_last_root for
748 * the offset of generation_v2 is also used as the start for the memset
749 * when invalidating the fields.
751 __le64 generation_v2;
752 u8 uuid[BTRFS_UUID_SIZE];
753 u8 parent_uuid[BTRFS_UUID_SIZE];
754 u8 received_uuid[BTRFS_UUID_SIZE];
755 __le64 ctransid; /* updated when an inode changes */
756 __le64 otransid; /* trans when created */
757 __le64 stransid; /* trans when sent. non-zero for received subvol */
758 __le64 rtransid; /* trans when received. non-zero for received subvol */
759 struct btrfs_timespec ctime;
760 struct btrfs_timespec otime;
761 struct btrfs_timespec stime;
762 struct btrfs_timespec rtime;
763 __le64 reserved[8]; /* for future */
764 } __attribute__ ((__packed__));
767 * this is used for both forward and backward root refs
769 struct btrfs_root_ref {
773 } __attribute__ ((__packed__));
775 struct btrfs_disk_balance_args {
777 * profiles to operate on, single is denoted by
778 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
788 /* devid subset filter [pstart..pend) */
792 /* btrfs virtual address space subset filter [vstart..vend) */
797 * profile to convert to, single is denoted by
798 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
802 /* BTRFS_BALANCE_ARGS_* */
806 } __attribute__ ((__packed__));
809 * store balance parameters to disk so that balance can be properly
810 * resumed after crash or unmount
812 struct btrfs_balance_item {
813 /* BTRFS_BALANCE_* */
816 struct btrfs_disk_balance_args data;
817 struct btrfs_disk_balance_args meta;
818 struct btrfs_disk_balance_args sys;
821 } __attribute__ ((__packed__));
823 #define BTRFS_FILE_EXTENT_INLINE 0
824 #define BTRFS_FILE_EXTENT_REG 1
825 #define BTRFS_FILE_EXTENT_PREALLOC 2
827 struct btrfs_file_extent_item {
829 * transaction id that created this extent
833 * max number of bytes to hold this extent in ram
834 * when we split a compressed extent we can't know how big
835 * each of the resulting pieces will be. So, this is
836 * an upper limit on the size of the extent in ram instead of
842 * 32 bits for the various ways we might encode the data,
843 * including compression and encryption. If any of these
844 * are set to something a given disk format doesn't understand
845 * it is treated like an incompat flag for reading and writing,
850 __le16 other_encoding; /* spare for later use */
852 /* are we inline data or a real extent? */
856 * disk space consumed by the extent, checksum blocks are included
860 __le64 disk_num_bytes;
862 * the logical offset in file blocks (no csums)
863 * this extent record is for. This allows a file extent to point
864 * into the middle of an existing extent on disk, sharing it
865 * between two snapshots (useful if some bytes in the middle of the
866 * extent have changed
870 * the logical number of file blocks (no csums included). This
871 * always reflects the size uncompressed and without encoding.
875 } __attribute__ ((__packed__));
877 struct btrfs_csum_item {
879 } __attribute__ ((__packed__));
881 struct btrfs_dev_stats_item {
883 * grow this item struct at the end for future enhancements and keep
884 * the existing values unchanged
886 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
887 } __attribute__ ((__packed__));
889 /* different types of block groups (and chunks) */
890 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
891 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
892 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
893 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
894 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
895 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
896 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
897 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
898 #define BTRFS_NR_RAID_TYPES 5
900 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
901 BTRFS_BLOCK_GROUP_SYSTEM | \
902 BTRFS_BLOCK_GROUP_METADATA)
904 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
905 BTRFS_BLOCK_GROUP_RAID1 | \
906 BTRFS_BLOCK_GROUP_DUP | \
907 BTRFS_BLOCK_GROUP_RAID10)
909 * We need a bit for restriper to be able to tell when chunks of type
910 * SINGLE are available. This "extended" profile format is used in
911 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
912 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
913 * to avoid remappings between two formats in future.
915 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
917 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
918 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
920 static inline u64 chunk_to_extended(u64 flags)
922 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
923 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
927 static inline u64 extended_to_chunk(u64 flags)
929 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
932 struct btrfs_block_group_item {
934 __le64 chunk_objectid;
936 } __attribute__ ((__packed__));
939 * is subvolume quota turned on?
941 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
943 * SCANNING is set during the initialization phase
945 #define BTRFS_QGROUP_STATUS_FLAG_SCANNING (1ULL << 1)
947 * Some qgroup entries are known to be out of date,
948 * either because the configuration has changed in a way that
949 * makes a rescan necessary, or because the fs has been mounted
950 * with a non-qgroup-aware version.
951 * Turning qouta off and on again makes it inconsistent, too.
953 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
955 #define BTRFS_QGROUP_STATUS_VERSION 1
957 struct btrfs_qgroup_status_item {
960 * the generation is updated during every commit. As older
961 * versions of btrfs are not aware of qgroups, it will be
962 * possible to detect inconsistencies by checking the
963 * generation on mount time
967 /* flag definitions see above */
971 * only used during scanning to record the progress
972 * of the scan. It contains a logical address
975 } __attribute__ ((__packed__));
977 struct btrfs_qgroup_info_item {
983 } __attribute__ ((__packed__));
985 /* flags definition for qgroup limits */
986 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
987 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
988 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
989 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
990 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
991 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
993 struct btrfs_qgroup_limit_item {
995 * only updated when any of the other values change
1002 } __attribute__ ((__packed__));
1004 struct btrfs_space_info {
1007 u64 total_bytes; /* total bytes in the space,
1008 this doesn't take mirrors into account */
1009 u64 bytes_used; /* total bytes used,
1010 this doesn't take mirrors into account */
1011 u64 bytes_pinned; /* total bytes pinned, will be freed when the
1012 transaction finishes */
1013 u64 bytes_reserved; /* total bytes the allocator has reserved for
1014 current allocations */
1015 u64 bytes_readonly; /* total bytes that are read only */
1017 u64 bytes_may_use; /* number of bytes that may be used for
1018 delalloc/allocations */
1019 u64 disk_used; /* total bytes used on disk */
1020 u64 disk_total; /* total bytes on disk, takes mirrors into
1024 * we bump reservation progress every time we decrement
1025 * bytes_reserved. This way people waiting for reservations
1026 * know something good has happened and they can check
1027 * for progress. The number here isn't to be trusted, it
1028 * just shows reclaim activity
1030 unsigned long reservation_progress;
1032 unsigned int full:1; /* indicates that we cannot allocate any more
1033 chunks for this space */
1034 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1036 unsigned int flush:1; /* set if we are trying to make space */
1038 unsigned int force_alloc; /* set if we need to force a chunk
1039 alloc for this space */
1041 struct list_head list;
1043 /* for block groups in our same type */
1044 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1046 struct rw_semaphore groups_sem;
1047 wait_queue_head_t wait;
1050 #define BTRFS_BLOCK_RSV_GLOBAL 1
1051 #define BTRFS_BLOCK_RSV_DELALLOC 2
1052 #define BTRFS_BLOCK_RSV_TRANS 3
1053 #define BTRFS_BLOCK_RSV_CHUNK 4
1054 #define BTRFS_BLOCK_RSV_DELOPS 5
1055 #define BTRFS_BLOCK_RSV_EMPTY 6
1056 #define BTRFS_BLOCK_RSV_TEMP 7
1058 struct btrfs_block_rsv {
1061 struct btrfs_space_info *space_info;
1063 unsigned short full;
1064 unsigned short type;
1065 unsigned short failfast;
1069 * free clusters are used to claim free space in relatively large chunks,
1070 * allowing us to do less seeky writes. They are used for all metadata
1071 * allocations and data allocations in ssd mode.
1073 struct btrfs_free_cluster {
1075 spinlock_t refill_lock;
1076 struct rb_root root;
1078 /* largest extent in this cluster */
1081 /* first extent starting offset */
1084 struct btrfs_block_group_cache *block_group;
1086 * when a cluster is allocated from a block group, we put the
1087 * cluster onto a list in the block group so that it can
1088 * be freed before the block group is freed.
1090 struct list_head block_group_list;
1093 enum btrfs_caching_type {
1095 BTRFS_CACHE_STARTED = 1,
1096 BTRFS_CACHE_FAST = 2,
1097 BTRFS_CACHE_FINISHED = 3,
1100 enum btrfs_disk_cache_state {
1101 BTRFS_DC_WRITTEN = 0,
1105 BTRFS_DC_NEED_WRITE = 4,
1108 struct btrfs_caching_control {
1109 struct list_head list;
1111 wait_queue_head_t wait;
1112 struct btrfs_work work;
1113 struct btrfs_block_group_cache *block_group;
1118 struct btrfs_block_group_cache {
1119 struct btrfs_key key;
1120 struct btrfs_block_group_item item;
1121 struct btrfs_fs_info *fs_info;
1122 struct inode *inode;
1129 u64 cache_generation;
1131 unsigned int dirty:1;
1132 unsigned int iref:1;
1134 int disk_cache_state;
1136 /* cache tracking stuff */
1138 struct btrfs_caching_control *caching_ctl;
1139 u64 last_byte_to_unpin;
1141 struct btrfs_space_info *space_info;
1143 /* free space cache stuff */
1144 struct btrfs_free_space_ctl *free_space_ctl;
1146 /* block group cache stuff */
1147 struct rb_node cache_node;
1149 /* for block groups in the same raid type */
1150 struct list_head list;
1155 /* List of struct btrfs_free_clusters for this block group.
1156 * Today it will only have one thing on it, but that may change
1158 struct list_head cluster_list;
1160 /* For delayed block group creation */
1161 struct list_head new_bg_list;
1164 /* delayed seq elem */
1166 struct list_head list;
1171 struct reloc_control;
1172 struct btrfs_device;
1173 struct btrfs_fs_devices;
1174 struct btrfs_balance_control;
1175 struct btrfs_delayed_root;
1176 struct btrfs_fs_info {
1177 u8 fsid[BTRFS_FSID_SIZE];
1178 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1179 struct btrfs_root *extent_root;
1180 struct btrfs_root *tree_root;
1181 struct btrfs_root *chunk_root;
1182 struct btrfs_root *dev_root;
1183 struct btrfs_root *fs_root;
1184 struct btrfs_root *csum_root;
1185 struct btrfs_root *quota_root;
1187 /* the log root tree is a directory of all the other log roots */
1188 struct btrfs_root *log_root_tree;
1190 spinlock_t fs_roots_radix_lock;
1191 struct radix_tree_root fs_roots_radix;
1193 /* block group cache stuff */
1194 spinlock_t block_group_cache_lock;
1195 struct rb_root block_group_cache_tree;
1197 /* keep track of unallocated space */
1198 spinlock_t free_chunk_lock;
1199 u64 free_chunk_space;
1201 struct extent_io_tree freed_extents[2];
1202 struct extent_io_tree *pinned_extents;
1204 /* logical->physical extent mapping */
1205 struct btrfs_mapping_tree mapping_tree;
1208 * block reservation for extent, checksum, root tree and
1209 * delayed dir index item
1211 struct btrfs_block_rsv global_block_rsv;
1212 /* block reservation for delay allocation */
1213 struct btrfs_block_rsv delalloc_block_rsv;
1214 /* block reservation for metadata operations */
1215 struct btrfs_block_rsv trans_block_rsv;
1216 /* block reservation for chunk tree */
1217 struct btrfs_block_rsv chunk_block_rsv;
1218 /* block reservation for delayed operations */
1219 struct btrfs_block_rsv delayed_block_rsv;
1221 struct btrfs_block_rsv empty_block_rsv;
1224 u64 last_trans_committed;
1227 * this is updated to the current trans every time a full commit
1228 * is required instead of the faster short fsync log commits
1230 u64 last_trans_log_full_commit;
1231 unsigned long mount_opt;
1232 unsigned long compress_type:4;
1235 struct btrfs_transaction *running_transaction;
1236 wait_queue_head_t transaction_throttle;
1237 wait_queue_head_t transaction_wait;
1238 wait_queue_head_t transaction_blocked_wait;
1239 wait_queue_head_t async_submit_wait;
1241 struct btrfs_super_block *super_copy;
1242 struct btrfs_super_block *super_for_commit;
1243 struct block_device *__bdev;
1244 struct super_block *sb;
1245 struct inode *btree_inode;
1246 struct backing_dev_info bdi;
1247 struct mutex tree_log_mutex;
1248 struct mutex transaction_kthread_mutex;
1249 struct mutex cleaner_mutex;
1250 struct mutex chunk_mutex;
1251 struct mutex volume_mutex;
1253 * this protects the ordered operations list only while we are
1254 * processing all of the entries on it. This way we make
1255 * sure the commit code doesn't find the list temporarily empty
1256 * because another function happens to be doing non-waiting preflush
1257 * before jumping into the main commit.
1259 struct mutex ordered_operations_mutex;
1260 struct rw_semaphore extent_commit_sem;
1262 struct rw_semaphore cleanup_work_sem;
1264 struct rw_semaphore subvol_sem;
1265 struct srcu_struct subvol_srcu;
1267 spinlock_t trans_lock;
1269 * the reloc mutex goes with the trans lock, it is taken
1270 * during commit to protect us from the relocation code
1272 struct mutex reloc_mutex;
1274 struct list_head trans_list;
1275 struct list_head dead_roots;
1276 struct list_head caching_block_groups;
1278 spinlock_t delayed_iput_lock;
1279 struct list_head delayed_iputs;
1281 /* this protects tree_mod_seq_list */
1282 spinlock_t tree_mod_seq_lock;
1283 atomic_t tree_mod_seq;
1284 struct list_head tree_mod_seq_list;
1285 struct seq_list tree_mod_seq_elem;
1287 /* this protects tree_mod_log */
1288 rwlock_t tree_mod_log_lock;
1289 struct rb_root tree_mod_log;
1291 atomic_t nr_async_submits;
1292 atomic_t async_submit_draining;
1293 atomic_t nr_async_bios;
1294 atomic_t async_delalloc_pages;
1295 atomic_t open_ioctl_trans;
1298 * this is used by the balancing code to wait for all the pending
1301 spinlock_t ordered_extent_lock;
1304 * all of the data=ordered extents pending writeback
1305 * these can span multiple transactions and basically include
1306 * every dirty data page that isn't from nodatacow
1308 struct list_head ordered_extents;
1311 * all of the inodes that have delalloc bytes. It is possible for
1312 * this list to be empty even when there is still dirty data=ordered
1313 * extents waiting to finish IO.
1315 struct list_head delalloc_inodes;
1318 * special rename and truncate targets that must be on disk before
1319 * we're allowed to commit. This is basically the ext3 style
1320 * data=ordered list.
1322 struct list_head ordered_operations;
1325 * there is a pool of worker threads for checksumming during writes
1326 * and a pool for checksumming after reads. This is because readers
1327 * can run with FS locks held, and the writers may be waiting for
1328 * those locks. We don't want ordering in the pending list to cause
1329 * deadlocks, and so the two are serviced separately.
1331 * A third pool does submit_bio to avoid deadlocking with the other
1334 struct btrfs_workers generic_worker;
1335 struct btrfs_workers workers;
1336 struct btrfs_workers delalloc_workers;
1337 struct btrfs_workers endio_workers;
1338 struct btrfs_workers endio_meta_workers;
1339 struct btrfs_workers endio_meta_write_workers;
1340 struct btrfs_workers endio_write_workers;
1341 struct btrfs_workers endio_freespace_worker;
1342 struct btrfs_workers submit_workers;
1343 struct btrfs_workers caching_workers;
1344 struct btrfs_workers readahead_workers;
1347 * fixup workers take dirty pages that didn't properly go through
1348 * the cow mechanism and make them safe to write. It happens
1349 * for the sys_munmap function call path
1351 struct btrfs_workers fixup_workers;
1352 struct btrfs_workers delayed_workers;
1353 struct task_struct *transaction_kthread;
1354 struct task_struct *cleaner_kthread;
1355 int thread_pool_size;
1357 struct kobject super_kobj;
1358 struct completion kobj_unregister;
1361 int log_root_recovering;
1367 /* protected by the delalloc lock, used to keep from writing
1368 * metadata until there is a nice batch
1370 u64 dirty_metadata_bytes;
1371 struct list_head dirty_cowonly_roots;
1373 struct btrfs_fs_devices *fs_devices;
1376 * the space_info list is almost entirely read only. It only changes
1377 * when we add a new raid type to the FS, and that happens
1378 * very rarely. RCU is used to protect it.
1380 struct list_head space_info;
1382 struct btrfs_space_info *data_sinfo;
1384 struct reloc_control *reloc_ctl;
1386 spinlock_t delalloc_lock;
1389 /* data_alloc_cluster is only used in ssd mode */
1390 struct btrfs_free_cluster data_alloc_cluster;
1392 /* all metadata allocations go through this cluster */
1393 struct btrfs_free_cluster meta_alloc_cluster;
1395 /* auto defrag inodes go here */
1396 spinlock_t defrag_inodes_lock;
1397 struct rb_root defrag_inodes;
1398 atomic_t defrag_running;
1401 * these three are in extended format (availability of single
1402 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1403 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1405 u64 avail_data_alloc_bits;
1406 u64 avail_metadata_alloc_bits;
1407 u64 avail_system_alloc_bits;
1409 /* restriper state */
1410 spinlock_t balance_lock;
1411 struct mutex balance_mutex;
1412 atomic_t balance_running;
1413 atomic_t balance_pause_req;
1414 atomic_t balance_cancel_req;
1415 struct btrfs_balance_control *balance_ctl;
1416 wait_queue_head_t balance_wait_q;
1418 unsigned data_chunk_allocations;
1419 unsigned metadata_ratio;
1423 /* private scrub information */
1424 struct mutex scrub_lock;
1425 atomic_t scrubs_running;
1426 atomic_t scrub_pause_req;
1427 atomic_t scrubs_paused;
1428 atomic_t scrub_cancel_req;
1429 wait_queue_head_t scrub_pause_wait;
1430 struct rw_semaphore scrub_super_lock;
1431 int scrub_workers_refcnt;
1432 struct btrfs_workers scrub_workers;
1434 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1435 u32 check_integrity_print_mask;
1440 unsigned int quota_enabled:1;
1443 * quota_enabled only changes state after a commit. This holds the
1446 unsigned int pending_quota_state:1;
1448 /* is qgroup tracking in a consistent state? */
1451 /* holds configuration and tracking. Protected by qgroup_lock */
1452 struct rb_root qgroup_tree;
1453 spinlock_t qgroup_lock;
1455 /* list of dirty qgroups to be written at next commit */
1456 struct list_head dirty_qgroups;
1458 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1461 /* filesystem state */
1464 struct btrfs_delayed_root *delayed_root;
1466 /* readahead tree */
1467 spinlock_t reada_lock;
1468 struct radix_tree_root reada_tree;
1470 /* next backup root to be overwritten */
1471 int backup_root_index;
1475 * in ram representation of the tree. extent_root is used for all allocations
1476 * and for the extent tree extent_root root.
1479 struct extent_buffer *node;
1481 struct extent_buffer *commit_root;
1482 struct btrfs_root *log_root;
1483 struct btrfs_root *reloc_root;
1485 struct btrfs_root_item root_item;
1486 struct btrfs_key root_key;
1487 struct btrfs_fs_info *fs_info;
1488 struct extent_io_tree dirty_log_pages;
1490 struct kobject root_kobj;
1491 struct completion kobj_unregister;
1492 struct mutex objectid_mutex;
1494 spinlock_t accounting_lock;
1495 struct btrfs_block_rsv *block_rsv;
1497 /* free ino cache stuff */
1498 struct mutex fs_commit_mutex;
1499 struct btrfs_free_space_ctl *free_ino_ctl;
1500 enum btrfs_caching_type cached;
1501 spinlock_t cache_lock;
1502 wait_queue_head_t cache_wait;
1503 struct btrfs_free_space_ctl *free_ino_pinned;
1505 struct inode *cache_inode;
1507 struct mutex log_mutex;
1508 wait_queue_head_t log_writer_wait;
1509 wait_queue_head_t log_commit_wait[2];
1510 atomic_t log_writers;
1511 atomic_t log_commit[2];
1513 unsigned long log_transid;
1514 unsigned long last_log_commit;
1515 pid_t log_start_pid;
1516 bool log_multiple_pids;
1521 /* data allocations are done in sectorsize units */
1524 /* node allocations are done in nodesize units */
1527 /* leaf allocations are done in leafsize units */
1534 u64 highest_objectid;
1536 /* btrfs_record_root_in_trans is a multi-step process,
1537 * and it can race with the balancing code. But the
1538 * race is very small, and only the first time the root
1539 * is added to each transaction. So in_trans_setup
1540 * is used to tell us when more checks are required
1542 unsigned long in_trans_setup;
1547 u64 defrag_trans_start;
1548 struct btrfs_key defrag_progress;
1549 struct btrfs_key defrag_max;
1553 /* the dirty list is only used by non-reference counted roots */
1554 struct list_head dirty_list;
1556 struct list_head root_list;
1558 spinlock_t orphan_lock;
1559 atomic_t orphan_inodes;
1560 struct btrfs_block_rsv *orphan_block_rsv;
1561 int orphan_item_inserted;
1562 int orphan_cleanup_state;
1564 spinlock_t inode_lock;
1565 /* red-black tree that keeps track of in-memory inodes */
1566 struct rb_root inode_tree;
1569 * radix tree that keeps track of delayed nodes of every inode,
1570 * protected by inode_lock
1572 struct radix_tree_root delayed_nodes_tree;
1574 * right now this just gets used so that a root has its own devid
1575 * for stat. It may be used for more later
1581 spinlock_t root_times_lock;
1584 struct btrfs_ioctl_defrag_range_args {
1585 /* start of the defrag operation */
1588 /* number of bytes to defrag, use (u64)-1 to say all */
1592 * flags for the operation, which can include turning
1593 * on compression for this one defrag
1598 * any extent bigger than this will be considered
1599 * already defragged. Use 0 to take the kernel default
1600 * Use 1 to say every single extent must be rewritten
1602 __u32 extent_thresh;
1605 * which compression method to use if turning on compression
1606 * for this defrag operation. If unspecified, zlib will
1609 __u32 compress_type;
1611 /* spare for later */
1617 * inode items have the data typically returned from stat and store other
1618 * info about object characteristics. There is one for every file and dir in
1621 #define BTRFS_INODE_ITEM_KEY 1
1622 #define BTRFS_INODE_REF_KEY 12
1623 #define BTRFS_INODE_EXTREF_KEY 13
1624 #define BTRFS_XATTR_ITEM_KEY 24
1625 #define BTRFS_ORPHAN_ITEM_KEY 48
1626 /* reserve 2-15 close to the inode for later flexibility */
1629 * dir items are the name -> inode pointers in a directory. There is one
1630 * for every name in a directory.
1632 #define BTRFS_DIR_LOG_ITEM_KEY 60
1633 #define BTRFS_DIR_LOG_INDEX_KEY 72
1634 #define BTRFS_DIR_ITEM_KEY 84
1635 #define BTRFS_DIR_INDEX_KEY 96
1637 * extent data is for file data
1639 #define BTRFS_EXTENT_DATA_KEY 108
1642 * extent csums are stored in a separate tree and hold csums for
1643 * an entire extent on disk.
1645 #define BTRFS_EXTENT_CSUM_KEY 128
1648 * root items point to tree roots. They are typically in the root
1649 * tree used by the super block to find all the other trees
1651 #define BTRFS_ROOT_ITEM_KEY 132
1654 * root backrefs tie subvols and snapshots to the directory entries that
1657 #define BTRFS_ROOT_BACKREF_KEY 144
1660 * root refs make a fast index for listing all of the snapshots and
1661 * subvolumes referenced by a given root. They point directly to the
1662 * directory item in the root that references the subvol
1664 #define BTRFS_ROOT_REF_KEY 156
1667 * extent items are in the extent map tree. These record which blocks
1668 * are used, and how many references there are to each block
1670 #define BTRFS_EXTENT_ITEM_KEY 168
1672 #define BTRFS_TREE_BLOCK_REF_KEY 176
1674 #define BTRFS_EXTENT_DATA_REF_KEY 178
1676 #define BTRFS_EXTENT_REF_V0_KEY 180
1678 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1680 #define BTRFS_SHARED_DATA_REF_KEY 184
1683 * block groups give us hints into the extent allocation trees. Which
1684 * blocks are free etc etc
1686 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1688 #define BTRFS_DEV_EXTENT_KEY 204
1689 #define BTRFS_DEV_ITEM_KEY 216
1690 #define BTRFS_CHUNK_ITEM_KEY 228
1693 * Records the overall state of the qgroups.
1694 * There's only one instance of this key present,
1695 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1697 #define BTRFS_QGROUP_STATUS_KEY 240
1699 * Records the currently used space of the qgroup.
1700 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1702 #define BTRFS_QGROUP_INFO_KEY 242
1704 * Contains the user configured limits for the qgroup.
1705 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1707 #define BTRFS_QGROUP_LIMIT_KEY 244
1709 * Records the child-parent relationship of qgroups. For
1710 * each relation, 2 keys are present:
1711 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1712 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1714 #define BTRFS_QGROUP_RELATION_KEY 246
1716 #define BTRFS_BALANCE_ITEM_KEY 248
1719 * Persistantly stores the io stats in the device tree.
1720 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1722 #define BTRFS_DEV_STATS_KEY 249
1725 * string items are for debugging. They just store a short string of
1728 #define BTRFS_STRING_ITEM_KEY 253
1731 * Flags for mount options.
1733 * Note: don't forget to add new options to btrfs_show_options()
1735 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1736 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1737 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1738 #define BTRFS_MOUNT_SSD (1 << 3)
1739 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1740 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1741 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1742 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1743 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1744 #define BTRFS_MOUNT_NOSSD (1 << 9)
1745 #define BTRFS_MOUNT_DISCARD (1 << 10)
1746 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1747 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1748 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1749 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1750 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1751 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1752 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1753 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1754 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1755 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1756 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1757 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1759 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1760 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1761 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1766 #define BTRFS_INODE_NODATASUM (1 << 0)
1767 #define BTRFS_INODE_NODATACOW (1 << 1)
1768 #define BTRFS_INODE_READONLY (1 << 2)
1769 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1770 #define BTRFS_INODE_PREALLOC (1 << 4)
1771 #define BTRFS_INODE_SYNC (1 << 5)
1772 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1773 #define BTRFS_INODE_APPEND (1 << 7)
1774 #define BTRFS_INODE_NODUMP (1 << 8)
1775 #define BTRFS_INODE_NOATIME (1 << 9)
1776 #define BTRFS_INODE_DIRSYNC (1 << 10)
1777 #define BTRFS_INODE_COMPRESS (1 << 11)
1779 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1781 struct btrfs_map_token {
1782 struct extent_buffer *eb;
1784 unsigned long offset;
1787 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1789 memset(token, 0, sizeof(*token));
1792 /* some macros to generate set/get funcs for the struct fields. This
1793 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1796 #define le8_to_cpu(v) (v)
1797 #define cpu_to_le8(v) (v)
1800 #define read_eb_member(eb, ptr, type, member, result) ( \
1801 read_extent_buffer(eb, (char *)(result), \
1802 ((unsigned long)(ptr)) + \
1803 offsetof(type, member), \
1804 sizeof(((type *)0)->member)))
1806 #define write_eb_member(eb, ptr, type, member, result) ( \
1807 write_extent_buffer(eb, (char *)(result), \
1808 ((unsigned long)(ptr)) + \
1809 offsetof(type, member), \
1810 sizeof(((type *)0)->member)))
1812 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1813 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1814 unsigned long off, \
1815 struct btrfs_map_token *token); \
1816 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1817 unsigned long off, u##bits val, \
1818 struct btrfs_map_token *token); \
1819 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1820 unsigned long off) \
1822 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1824 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1825 unsigned long off, u##bits val) \
1827 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1830 DECLARE_BTRFS_SETGET_BITS(8)
1831 DECLARE_BTRFS_SETGET_BITS(16)
1832 DECLARE_BTRFS_SETGET_BITS(32)
1833 DECLARE_BTRFS_SETGET_BITS(64)
1835 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1836 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1838 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1839 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1841 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1844 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1845 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1847 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1848 struct btrfs_map_token *token) \
1850 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1851 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1853 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1854 type *s, u##bits val, \
1855 struct btrfs_map_token *token) \
1857 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1858 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1861 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1862 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1864 type *p = page_address(eb->pages[0]); \
1865 u##bits res = le##bits##_to_cpu(p->member); \
1868 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1871 type *p = page_address(eb->pages[0]); \
1872 p->member = cpu_to_le##bits(val); \
1875 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1876 static inline u##bits btrfs_##name(type *s) \
1878 return le##bits##_to_cpu(s->member); \
1880 static inline void btrfs_set_##name(type *s, u##bits val) \
1882 s->member = cpu_to_le##bits(val); \
1885 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1886 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1887 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1888 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1889 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1890 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1892 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1893 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1894 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1895 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1896 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1897 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1899 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1900 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1902 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1904 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1906 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1908 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1910 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1911 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1913 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1915 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1917 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1920 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1922 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1925 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1927 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1930 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1931 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1932 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1933 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1934 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1935 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1936 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1937 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1938 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1939 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1940 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1942 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1944 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1947 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1948 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1949 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1951 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1953 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1955 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1957 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1958 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1960 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1962 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1963 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1965 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1968 unsigned long offset = (unsigned long)c;
1969 offset += offsetof(struct btrfs_chunk, stripe);
1970 offset += nr * sizeof(struct btrfs_stripe);
1971 return (struct btrfs_stripe *)offset;
1974 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1976 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1979 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1980 struct btrfs_chunk *c, int nr)
1982 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1985 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1986 struct btrfs_chunk *c, int nr)
1988 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1991 /* struct btrfs_block_group_item */
1992 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1994 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1996 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1997 struct btrfs_block_group_item, chunk_objectid, 64);
1999 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2000 struct btrfs_block_group_item, chunk_objectid, 64);
2001 BTRFS_SETGET_FUNCS(disk_block_group_flags,
2002 struct btrfs_block_group_item, flags, 64);
2003 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2004 struct btrfs_block_group_item, flags, 64);
2006 /* struct btrfs_inode_ref */
2007 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2008 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2010 /* struct btrfs_inode_extref */
2011 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2012 parent_objectid, 64);
2013 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2015 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2017 /* struct btrfs_inode_item */
2018 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2019 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2020 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2021 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2022 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2023 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2024 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2025 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2026 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2027 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2028 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2029 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2031 static inline struct btrfs_timespec *
2032 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
2034 unsigned long ptr = (unsigned long)inode_item;
2035 ptr += offsetof(struct btrfs_inode_item, atime);
2036 return (struct btrfs_timespec *)ptr;
2039 static inline struct btrfs_timespec *
2040 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
2042 unsigned long ptr = (unsigned long)inode_item;
2043 ptr += offsetof(struct btrfs_inode_item, mtime);
2044 return (struct btrfs_timespec *)ptr;
2047 static inline struct btrfs_timespec *
2048 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
2050 unsigned long ptr = (unsigned long)inode_item;
2051 ptr += offsetof(struct btrfs_inode_item, ctime);
2052 return (struct btrfs_timespec *)ptr;
2055 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2056 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2058 /* struct btrfs_dev_extent */
2059 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2061 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2062 chunk_objectid, 64);
2063 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2065 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2067 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2069 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2070 return (u8 *)((unsigned long)dev + ptr);
2073 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2074 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2076 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2078 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2081 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2083 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2084 struct btrfs_tree_block_info *item,
2085 struct btrfs_disk_key *key)
2087 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2090 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2091 struct btrfs_tree_block_info *item,
2092 struct btrfs_disk_key *key)
2094 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2097 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2099 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2101 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2103 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2106 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2109 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2111 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2114 static inline u32 btrfs_extent_inline_ref_size(int type)
2116 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2117 type == BTRFS_SHARED_BLOCK_REF_KEY)
2118 return sizeof(struct btrfs_extent_inline_ref);
2119 if (type == BTRFS_SHARED_DATA_REF_KEY)
2120 return sizeof(struct btrfs_shared_data_ref) +
2121 sizeof(struct btrfs_extent_inline_ref);
2122 if (type == BTRFS_EXTENT_DATA_REF_KEY)
2123 return sizeof(struct btrfs_extent_data_ref) +
2124 offsetof(struct btrfs_extent_inline_ref, offset);
2129 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2130 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2132 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2133 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2135 /* struct btrfs_node */
2136 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2137 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2139 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2142 ptr = offsetof(struct btrfs_node, ptrs) +
2143 sizeof(struct btrfs_key_ptr) * nr;
2144 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2147 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2151 ptr = offsetof(struct btrfs_node, ptrs) +
2152 sizeof(struct btrfs_key_ptr) * nr;
2153 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2156 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2159 ptr = offsetof(struct btrfs_node, ptrs) +
2160 sizeof(struct btrfs_key_ptr) * nr;
2161 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2164 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2168 ptr = offsetof(struct btrfs_node, ptrs) +
2169 sizeof(struct btrfs_key_ptr) * nr;
2170 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2173 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2175 return offsetof(struct btrfs_node, ptrs) +
2176 sizeof(struct btrfs_key_ptr) * nr;
2179 void btrfs_node_key(struct extent_buffer *eb,
2180 struct btrfs_disk_key *disk_key, int nr);
2182 static inline void btrfs_set_node_key(struct extent_buffer *eb,
2183 struct btrfs_disk_key *disk_key, int nr)
2186 ptr = btrfs_node_key_ptr_offset(nr);
2187 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2188 struct btrfs_key_ptr, key, disk_key);
2191 /* struct btrfs_item */
2192 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2193 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2195 static inline unsigned long btrfs_item_nr_offset(int nr)
2197 return offsetof(struct btrfs_leaf, items) +
2198 sizeof(struct btrfs_item) * nr;
2201 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
2204 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2207 static inline u32 btrfs_item_end(struct extent_buffer *eb,
2208 struct btrfs_item *item)
2210 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2213 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2215 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
2218 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2220 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
2223 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2225 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
2228 static inline void btrfs_item_key(struct extent_buffer *eb,
2229 struct btrfs_disk_key *disk_key, int nr)
2231 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2232 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2235 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2236 struct btrfs_disk_key *disk_key, int nr)
2238 struct btrfs_item *item = btrfs_item_nr(eb, nr);
2239 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2242 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2245 * struct btrfs_root_ref
2247 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2248 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2249 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2251 /* struct btrfs_dir_item */
2252 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2253 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2254 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2255 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2257 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2258 struct btrfs_dir_item *item,
2259 struct btrfs_disk_key *key)
2261 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2264 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2265 struct btrfs_dir_item *item,
2266 struct btrfs_disk_key *key)
2268 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2271 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2273 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2275 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2278 static inline void btrfs_free_space_key(struct extent_buffer *eb,
2279 struct btrfs_free_space_header *h,
2280 struct btrfs_disk_key *key)
2282 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2285 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2286 struct btrfs_free_space_header *h,
2287 struct btrfs_disk_key *key)
2289 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2292 /* struct btrfs_disk_key */
2293 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2295 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2296 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2298 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2299 struct btrfs_disk_key *disk)
2301 cpu->offset = le64_to_cpu(disk->offset);
2302 cpu->type = disk->type;
2303 cpu->objectid = le64_to_cpu(disk->objectid);
2306 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2307 struct btrfs_key *cpu)
2309 disk->offset = cpu_to_le64(cpu->offset);
2310 disk->type = cpu->type;
2311 disk->objectid = cpu_to_le64(cpu->objectid);
2314 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2315 struct btrfs_key *key, int nr)
2317 struct btrfs_disk_key disk_key;
2318 btrfs_node_key(eb, &disk_key, nr);
2319 btrfs_disk_key_to_cpu(key, &disk_key);
2322 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2323 struct btrfs_key *key, int nr)
2325 struct btrfs_disk_key disk_key;
2326 btrfs_item_key(eb, &disk_key, nr);
2327 btrfs_disk_key_to_cpu(key, &disk_key);
2330 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2331 struct btrfs_dir_item *item,
2332 struct btrfs_key *key)
2334 struct btrfs_disk_key disk_key;
2335 btrfs_dir_item_key(eb, item, &disk_key);
2336 btrfs_disk_key_to_cpu(key, &disk_key);
2340 static inline u8 btrfs_key_type(struct btrfs_key *key)
2345 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2350 /* struct btrfs_header */
2351 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2352 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2354 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2355 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2356 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2357 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2359 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2361 return (btrfs_header_flags(eb) & flag) == flag;
2364 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2366 u64 flags = btrfs_header_flags(eb);
2367 btrfs_set_header_flags(eb, flags | flag);
2368 return (flags & flag) == flag;
2371 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2373 u64 flags = btrfs_header_flags(eb);
2374 btrfs_set_header_flags(eb, flags & ~flag);
2375 return (flags & flag) == flag;
2378 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2380 u64 flags = btrfs_header_flags(eb);
2381 return flags >> BTRFS_BACKREF_REV_SHIFT;
2384 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2387 u64 flags = btrfs_header_flags(eb);
2388 flags &= ~BTRFS_BACKREF_REV_MASK;
2389 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2390 btrfs_set_header_flags(eb, flags);
2393 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
2395 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2399 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2401 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2405 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2407 return btrfs_header_level(eb) == 0;
2410 /* struct btrfs_root_item */
2411 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2413 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2414 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2415 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2417 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2419 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2420 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2421 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2422 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2423 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2424 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2425 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2426 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2428 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2430 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2432 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2434 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2436 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2439 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2441 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2444 /* struct btrfs_root_backup */
2445 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2447 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2449 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2450 tree_root_level, 8);
2452 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2454 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2455 chunk_root_gen, 64);
2456 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2457 chunk_root_level, 8);
2459 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2461 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2462 extent_root_gen, 64);
2463 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2464 extent_root_level, 8);
2466 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2468 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2470 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2473 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2475 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2477 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2480 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2482 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2484 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2485 csum_root_level, 8);
2486 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2488 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2490 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2493 /* struct btrfs_balance_item */
2494 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2496 static inline void btrfs_balance_data(struct extent_buffer *eb,
2497 struct btrfs_balance_item *bi,
2498 struct btrfs_disk_balance_args *ba)
2500 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2503 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2504 struct btrfs_balance_item *bi,
2505 struct btrfs_disk_balance_args *ba)
2507 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2510 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2511 struct btrfs_balance_item *bi,
2512 struct btrfs_disk_balance_args *ba)
2514 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2517 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2518 struct btrfs_balance_item *bi,
2519 struct btrfs_disk_balance_args *ba)
2521 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2524 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2525 struct btrfs_balance_item *bi,
2526 struct btrfs_disk_balance_args *ba)
2528 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2531 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2532 struct btrfs_balance_item *bi,
2533 struct btrfs_disk_balance_args *ba)
2535 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2539 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2540 struct btrfs_disk_balance_args *disk)
2542 memset(cpu, 0, sizeof(*cpu));
2544 cpu->profiles = le64_to_cpu(disk->profiles);
2545 cpu->usage = le64_to_cpu(disk->usage);
2546 cpu->devid = le64_to_cpu(disk->devid);
2547 cpu->pstart = le64_to_cpu(disk->pstart);
2548 cpu->pend = le64_to_cpu(disk->pend);
2549 cpu->vstart = le64_to_cpu(disk->vstart);
2550 cpu->vend = le64_to_cpu(disk->vend);
2551 cpu->target = le64_to_cpu(disk->target);
2552 cpu->flags = le64_to_cpu(disk->flags);
2556 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2557 struct btrfs_balance_args *cpu)
2559 memset(disk, 0, sizeof(*disk));
2561 disk->profiles = cpu_to_le64(cpu->profiles);
2562 disk->usage = cpu_to_le64(cpu->usage);
2563 disk->devid = cpu_to_le64(cpu->devid);
2564 disk->pstart = cpu_to_le64(cpu->pstart);
2565 disk->pend = cpu_to_le64(cpu->pend);
2566 disk->vstart = cpu_to_le64(cpu->vstart);
2567 disk->vend = cpu_to_le64(cpu->vend);
2568 disk->target = cpu_to_le64(cpu->target);
2569 disk->flags = cpu_to_le64(cpu->flags);
2572 /* struct btrfs_super_block */
2573 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2574 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2575 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2577 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2578 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2579 struct btrfs_super_block, sys_chunk_array_size, 32);
2580 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2581 struct btrfs_super_block, chunk_root_generation, 64);
2582 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2584 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2586 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2587 chunk_root_level, 8);
2588 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2590 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2591 log_root_transid, 64);
2592 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2594 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2596 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2598 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2600 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2602 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2604 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2606 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2607 root_dir_objectid, 64);
2608 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2610 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2612 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2613 compat_ro_flags, 64);
2614 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2615 incompat_flags, 64);
2616 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2618 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2619 cache_generation, 64);
2621 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2623 int t = btrfs_super_csum_type(s);
2624 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2625 return btrfs_csum_sizes[t];
2628 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2630 return offsetof(struct btrfs_leaf, items);
2633 /* struct btrfs_file_extent_item */
2634 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2636 static inline unsigned long
2637 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2639 unsigned long offset = (unsigned long)e;
2640 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2644 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2646 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2649 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2651 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2653 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2654 disk_num_bytes, 64);
2655 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2657 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2659 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2661 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2663 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2665 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2666 other_encoding, 16);
2668 /* this returns the number of file bytes represented by the inline item.
2669 * If an item is compressed, this is the uncompressed size
2671 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2672 struct btrfs_file_extent_item *e)
2674 return btrfs_file_extent_ram_bytes(eb, e);
2678 * this returns the number of bytes used by the item on disk, minus the
2679 * size of any extent headers. If a file is compressed on disk, this is
2680 * the compressed size
2682 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2683 struct btrfs_item *e)
2685 unsigned long offset;
2686 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2687 return btrfs_item_size(eb, e) - offset;
2690 /* btrfs_dev_stats_item */
2691 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2692 struct btrfs_dev_stats_item *ptr,
2697 read_extent_buffer(eb, &val,
2698 offsetof(struct btrfs_dev_stats_item, values) +
2699 ((unsigned long)ptr) + (index * sizeof(u64)),
2704 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2705 struct btrfs_dev_stats_item *ptr,
2708 write_extent_buffer(eb, &val,
2709 offsetof(struct btrfs_dev_stats_item, values) +
2710 ((unsigned long)ptr) + (index * sizeof(u64)),
2714 /* btrfs_qgroup_status_item */
2715 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2717 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2719 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2721 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2724 /* btrfs_qgroup_info_item */
2725 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2727 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2728 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2730 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2731 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2734 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2735 struct btrfs_qgroup_info_item, generation, 64);
2736 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2738 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2739 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2740 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2742 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2743 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2745 /* btrfs_qgroup_limit_item */
2746 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2748 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2750 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2752 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2754 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2757 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
2759 return sb->s_fs_info;
2762 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2765 return root->leafsize;
2766 return root->nodesize;
2769 /* helper function to cast into the data area of the leaf. */
2770 #define btrfs_item_ptr(leaf, slot, type) \
2771 ((type *)(btrfs_leaf_data(leaf) + \
2772 btrfs_item_offset_nr(leaf, slot)))
2774 #define btrfs_item_ptr_offset(leaf, slot) \
2775 ((unsigned long)(btrfs_leaf_data(leaf) + \
2776 btrfs_item_offset_nr(leaf, slot)))
2778 static inline struct dentry *fdentry(struct file *file)
2780 return file->f_path.dentry;
2783 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2785 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2786 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2789 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2791 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2795 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2798 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2803 * Doing a truncate won't result in new nodes or leaves, just what we need for
2806 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2809 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2813 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2814 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2815 struct btrfs_root *root, unsigned long count);
2816 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2817 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2818 struct btrfs_root *root, u64 bytenr,
2819 u64 num_bytes, u64 *refs, u64 *flags);
2820 int btrfs_pin_extent(struct btrfs_root *root,
2821 u64 bytenr, u64 num, int reserved);
2822 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2823 struct btrfs_root *root,
2824 u64 bytenr, u64 num_bytes);
2825 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2826 struct btrfs_root *root,
2827 u64 objectid, u64 offset, u64 bytenr);
2828 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2829 struct btrfs_fs_info *info,
2831 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2832 u64 btrfs_find_block_group(struct btrfs_root *root,
2833 u64 search_start, u64 search_hint, int owner);
2834 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2835 struct btrfs_root *root, u32 blocksize,
2836 u64 parent, u64 root_objectid,
2837 struct btrfs_disk_key *key, int level,
2838 u64 hint, u64 empty_size);
2839 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2840 struct btrfs_root *root,
2841 struct extent_buffer *buf,
2842 u64 parent, int last_ref);
2843 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2844 struct btrfs_root *root,
2845 u64 bytenr, u32 blocksize,
2847 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2848 struct btrfs_root *root,
2849 u64 root_objectid, u64 owner,
2850 u64 offset, struct btrfs_key *ins);
2851 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2852 struct btrfs_root *root,
2853 u64 root_objectid, u64 owner, u64 offset,
2854 struct btrfs_key *ins);
2855 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2856 struct btrfs_root *root,
2857 u64 num_bytes, u64 min_alloc_size,
2858 u64 empty_size, u64 hint_byte,
2859 struct btrfs_key *ins, u64 data);
2860 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2861 struct extent_buffer *buf, int full_backref, int for_cow);
2862 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2863 struct extent_buffer *buf, int full_backref, int for_cow);
2864 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2865 struct btrfs_root *root,
2866 u64 bytenr, u64 num_bytes, u64 flags,
2868 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2869 struct btrfs_root *root,
2870 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2871 u64 owner, u64 offset, int for_cow);
2873 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2874 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2875 u64 start, u64 len);
2876 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2877 struct btrfs_root *root);
2878 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2879 struct btrfs_root *root);
2880 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2881 struct btrfs_root *root,
2882 u64 bytenr, u64 num_bytes, u64 parent,
2883 u64 root_objectid, u64 owner, u64 offset, int for_cow);
2885 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2886 struct btrfs_root *root);
2887 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2888 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2889 int btrfs_read_block_groups(struct btrfs_root *root);
2890 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2891 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2892 struct btrfs_root *root, u64 bytes_used,
2893 u64 type, u64 chunk_objectid, u64 chunk_offset,
2895 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2896 struct btrfs_root *root, u64 group_start);
2897 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
2898 struct btrfs_root *root);
2899 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2900 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2901 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2902 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2903 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2904 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2905 struct btrfs_root *root);
2906 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2907 struct inode *inode);
2908 void btrfs_orphan_release_metadata(struct inode *inode);
2909 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2910 struct btrfs_pending_snapshot *pending);
2911 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2912 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2913 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2914 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2915 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2916 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
2917 unsigned short type);
2918 void btrfs_free_block_rsv(struct btrfs_root *root,
2919 struct btrfs_block_rsv *rsv);
2920 int btrfs_block_rsv_add(struct btrfs_root *root,
2921 struct btrfs_block_rsv *block_rsv,
2923 int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
2924 struct btrfs_block_rsv *block_rsv,
2926 int btrfs_block_rsv_check(struct btrfs_root *root,
2927 struct btrfs_block_rsv *block_rsv, int min_factor);
2928 int btrfs_block_rsv_refill(struct btrfs_root *root,
2929 struct btrfs_block_rsv *block_rsv,
2931 int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
2932 struct btrfs_block_rsv *block_rsv,
2934 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2935 struct btrfs_block_rsv *dst_rsv,
2937 void btrfs_block_rsv_release(struct btrfs_root *root,
2938 struct btrfs_block_rsv *block_rsv,
2940 int btrfs_set_block_group_ro(struct btrfs_root *root,
2941 struct btrfs_block_group_cache *cache);
2942 void btrfs_set_block_group_rw(struct btrfs_root *root,
2943 struct btrfs_block_group_cache *cache);
2944 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2945 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2946 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2947 u64 start, u64 end);
2948 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2949 u64 num_bytes, u64 *actual_bytes);
2950 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2951 struct btrfs_root *root, u64 type);
2952 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2954 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2955 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2956 struct btrfs_fs_info *fs_info);
2958 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2959 int level, int *slot);
2960 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2961 int btrfs_previous_item(struct btrfs_root *root,
2962 struct btrfs_path *path, u64 min_objectid,
2964 void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2965 struct btrfs_root *root, struct btrfs_path *path,
2966 struct btrfs_key *new_key);
2967 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2968 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2969 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2970 struct btrfs_key *key, int lowest_level,
2971 int cache_only, u64 min_trans);
2972 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2973 struct btrfs_key *max_key,
2974 struct btrfs_path *path, int cache_only,
2976 enum btrfs_compare_tree_result {
2977 BTRFS_COMPARE_TREE_NEW,
2978 BTRFS_COMPARE_TREE_DELETED,
2979 BTRFS_COMPARE_TREE_CHANGED,
2981 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
2982 struct btrfs_root *right_root,
2983 struct btrfs_path *left_path,
2984 struct btrfs_path *right_path,
2985 struct btrfs_key *key,
2986 enum btrfs_compare_tree_result result,
2988 int btrfs_compare_trees(struct btrfs_root *left_root,
2989 struct btrfs_root *right_root,
2990 btrfs_changed_cb_t cb, void *ctx);
2991 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2992 struct btrfs_root *root, struct extent_buffer *buf,
2993 struct extent_buffer *parent, int parent_slot,
2994 struct extent_buffer **cow_ret);
2995 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2996 struct btrfs_root *root,
2997 struct extent_buffer *buf,
2998 struct extent_buffer **cow_ret, u64 new_root_objectid);
2999 int btrfs_block_can_be_shared(struct btrfs_root *root,
3000 struct extent_buffer *buf);
3001 void btrfs_extend_item(struct btrfs_trans_handle *trans,
3002 struct btrfs_root *root, struct btrfs_path *path,
3004 void btrfs_truncate_item(struct btrfs_trans_handle *trans,
3005 struct btrfs_root *root,
3006 struct btrfs_path *path,
3007 u32 new_size, int from_end);
3008 int btrfs_split_item(struct btrfs_trans_handle *trans,
3009 struct btrfs_root *root,
3010 struct btrfs_path *path,
3011 struct btrfs_key *new_key,
3012 unsigned long split_offset);
3013 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3014 struct btrfs_root *root,
3015 struct btrfs_path *path,
3016 struct btrfs_key *new_key);
3017 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3018 *root, struct btrfs_key *key, struct btrfs_path *p, int
3020 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3021 struct btrfs_path *p, u64 time_seq);
3022 int btrfs_search_slot_for_read(struct btrfs_root *root,
3023 struct btrfs_key *key, struct btrfs_path *p,
3024 int find_higher, int return_any);
3025 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3026 struct btrfs_root *root, struct extent_buffer *parent,
3027 int start_slot, int cache_only, u64 *last_ret,
3028 struct btrfs_key *progress);
3029 void btrfs_release_path(struct btrfs_path *p);
3030 struct btrfs_path *btrfs_alloc_path(void);
3031 void btrfs_free_path(struct btrfs_path *p);
3032 void btrfs_set_path_blocking(struct btrfs_path *p);
3033 void btrfs_clear_path_blocking(struct btrfs_path *p,
3034 struct extent_buffer *held, int held_rw);
3035 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3037 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3038 struct btrfs_path *path, int slot, int nr);
3039 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3040 struct btrfs_root *root,
3041 struct btrfs_path *path)
3043 return btrfs_del_items(trans, root, path, path->slots[0], 1);
3046 void setup_items_for_insert(struct btrfs_trans_handle *trans,
3047 struct btrfs_root *root, struct btrfs_path *path,
3048 struct btrfs_key *cpu_key, u32 *data_size,
3049 u32 total_data, u32 total_size, int nr);
3050 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3051 *root, struct btrfs_key *key, void *data, u32 data_size);
3052 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3053 struct btrfs_root *root,
3054 struct btrfs_path *path,
3055 struct btrfs_key *cpu_key, u32 *data_size, int nr);
3057 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3058 struct btrfs_root *root,
3059 struct btrfs_path *path,
3060 struct btrfs_key *key,
3063 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3066 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3067 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3069 static inline int btrfs_next_old_item(struct btrfs_root *root,
3070 struct btrfs_path *p, u64 time_seq)
3073 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3074 return btrfs_next_old_leaf(root, p, time_seq);
3077 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3079 return btrfs_next_old_item(root, p, 0);
3081 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3082 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3083 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3084 struct btrfs_block_rsv *block_rsv,
3085 int update_ref, int for_reloc);
3086 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3087 struct btrfs_root *root,
3088 struct extent_buffer *node,
3089 struct extent_buffer *parent);
3090 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3093 * Get synced with close_ctree()
3096 return fs_info->closing;
3098 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3100 kfree(fs_info->balance_ctl);
3101 kfree(fs_info->delayed_root);
3102 kfree(fs_info->extent_root);
3103 kfree(fs_info->tree_root);
3104 kfree(fs_info->chunk_root);
3105 kfree(fs_info->dev_root);
3106 kfree(fs_info->csum_root);
3107 kfree(fs_info->quota_root);
3108 kfree(fs_info->super_copy);
3109 kfree(fs_info->super_for_commit);
3113 /* tree mod log functions from ctree.c */
3114 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3115 struct seq_list *elem);
3116 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3117 struct seq_list *elem);
3118 static inline u64 btrfs_inc_tree_mod_seq(struct btrfs_fs_info *fs_info)
3120 return atomic_inc_return(&fs_info->tree_mod_seq);
3124 int btrfs_find_root_ref(struct btrfs_root *tree_root,
3125 struct btrfs_path *path,
3126 u64 root_id, u64 ref_id);
3127 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3128 struct btrfs_root *tree_root,
3129 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3130 const char *name, int name_len);
3131 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3132 struct btrfs_root *tree_root,
3133 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3134 const char *name, int name_len);
3135 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3136 struct btrfs_key *key);
3137 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3138 *root, struct btrfs_key *key, struct btrfs_root_item
3140 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3141 struct btrfs_root *root,
3142 struct btrfs_key *key,
3143 struct btrfs_root_item *item);
3144 void btrfs_read_root_item(struct btrfs_root *root,
3145 struct extent_buffer *eb, int slot,
3146 struct btrfs_root_item *item);
3147 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
3148 btrfs_root_item *item, struct btrfs_key *key);
3149 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
3150 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3151 void btrfs_set_root_node(struct btrfs_root_item *item,
3152 struct extent_buffer *node);
3153 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3154 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3155 struct btrfs_root *root);
3158 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3159 struct btrfs_root *root, const char *name,
3160 int name_len, struct inode *dir,
3161 struct btrfs_key *location, u8 type, u64 index);
3162 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3163 struct btrfs_root *root,
3164 struct btrfs_path *path, u64 dir,
3165 const char *name, int name_len,
3167 struct btrfs_dir_item *
3168 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3169 struct btrfs_root *root,
3170 struct btrfs_path *path, u64 dir,
3171 u64 objectid, const char *name, int name_len,
3173 struct btrfs_dir_item *
3174 btrfs_search_dir_index_item(struct btrfs_root *root,
3175 struct btrfs_path *path, u64 dirid,
3176 const char *name, int name_len);
3177 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3178 struct btrfs_path *path,
3179 const char *name, int name_len);
3180 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3181 struct btrfs_root *root,
3182 struct btrfs_path *path,
3183 struct btrfs_dir_item *di);
3184 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3185 struct btrfs_root *root,
3186 struct btrfs_path *path, u64 objectid,
3187 const char *name, u16 name_len,
3188 const void *data, u16 data_len);
3189 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3190 struct btrfs_root *root,
3191 struct btrfs_path *path, u64 dir,
3192 const char *name, u16 name_len,
3194 int verify_dir_item(struct btrfs_root *root,
3195 struct extent_buffer *leaf,
3196 struct btrfs_dir_item *dir_item);
3199 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3200 struct btrfs_root *root, u64 offset);
3201 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3202 struct btrfs_root *root, u64 offset);
3203 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3206 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3207 struct btrfs_root *root,
3208 const char *name, int name_len,
3209 u64 inode_objectid, u64 ref_objectid, u64 index);
3210 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3211 struct btrfs_root *root,
3212 const char *name, int name_len,
3213 u64 inode_objectid, u64 ref_objectid, u64 *index);
3214 int btrfs_get_inode_ref_index(struct btrfs_trans_handle *trans,
3215 struct btrfs_root *root,
3216 struct btrfs_path *path,
3217 const char *name, int name_len,
3218 u64 inode_objectid, u64 ref_objectid, int mod,
3220 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3221 struct btrfs_root *root,
3222 struct btrfs_path *path, u64 objectid);
3223 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3224 *root, struct btrfs_path *path,
3225 struct btrfs_key *location, int mod);
3227 struct btrfs_inode_extref *
3228 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3229 struct btrfs_root *root,
3230 struct btrfs_path *path,
3231 const char *name, int name_len,
3232 u64 inode_objectid, u64 ref_objectid, int ins_len,
3235 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3236 u64 ref_objectid, const char *name,
3238 struct btrfs_inode_extref **extref_ret);
3241 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3242 struct btrfs_root *root, u64 bytenr, u64 len);
3243 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3244 struct bio *bio, u32 *dst);
3245 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3246 struct bio *bio, u64 logical_offset);
3247 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3248 struct btrfs_root *root,
3249 u64 objectid, u64 pos,
3250 u64 disk_offset, u64 disk_num_bytes,
3251 u64 num_bytes, u64 offset, u64 ram_bytes,
3252 u8 compression, u8 encryption, u16 other_encoding);
3253 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3254 struct btrfs_root *root,
3255 struct btrfs_path *path, u64 objectid,
3256 u64 bytenr, int mod);
3257 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3258 struct btrfs_root *root,
3259 struct btrfs_ordered_sum *sums);
3260 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3261 struct bio *bio, u64 file_start, int contig);
3262 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
3263 struct btrfs_root *root,
3264 struct btrfs_path *path,
3265 u64 bytenr, int cow);
3266 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
3267 struct btrfs_root *root, struct btrfs_path *path,
3269 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3270 struct list_head *list, int search_commit);
3272 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3273 size_t pg_offset, u64 start, u64 len,
3276 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3277 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3278 #define ClearPageChecked ClearPageFsMisc
3279 #define SetPageChecked SetPageFsMisc
3280 #define PageChecked PageFsMisc
3283 /* This forces readahead on a given range of bytes in an inode */
3284 static inline void btrfs_force_ra(struct address_space *mapping,
3285 struct file_ra_state *ra, struct file *file,
3286 pgoff_t offset, unsigned long req_size)
3288 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3291 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3292 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3293 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3294 struct btrfs_root *root,
3295 struct inode *dir, struct inode *inode,
3296 const char *name, int name_len);
3297 int btrfs_add_link(struct btrfs_trans_handle *trans,
3298 struct inode *parent_inode, struct inode *inode,
3299 const char *name, int name_len, int add_backref, u64 index);
3300 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3301 struct btrfs_root *root,
3302 struct inode *dir, u64 objectid,
3303 const char *name, int name_len);
3304 int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3306 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3307 struct btrfs_root *root,
3308 struct inode *inode, u64 new_size,
3311 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3312 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3313 struct extent_state **cached_state);
3314 int btrfs_writepages(struct address_space *mapping,
3315 struct writeback_control *wbc);
3316 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3317 struct btrfs_root *new_root, u64 new_dirid);
3318 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3319 size_t size, struct bio *bio, unsigned long bio_flags);
3321 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3322 int btrfs_readpage(struct file *file, struct page *page);
3323 void btrfs_evict_inode(struct inode *inode);
3324 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3325 int btrfs_dirty_inode(struct inode *inode);
3326 struct inode *btrfs_alloc_inode(struct super_block *sb);
3327 void btrfs_destroy_inode(struct inode *inode);
3328 int btrfs_drop_inode(struct inode *inode);
3329 int btrfs_init_cachep(void);
3330 void btrfs_destroy_cachep(void);
3331 long btrfs_ioctl_trans_end(struct file *file);
3332 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3333 struct btrfs_root *root, int *was_new);
3334 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3335 size_t pg_offset, u64 start, u64 end,
3337 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3338 struct btrfs_root *root,
3339 struct inode *inode);
3340 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3341 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
3342 int btrfs_orphan_cleanup(struct btrfs_root *root);
3343 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3344 struct btrfs_root *root);
3345 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3346 void btrfs_invalidate_inodes(struct btrfs_root *root);
3347 void btrfs_add_delayed_iput(struct inode *inode);
3348 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3349 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3350 u64 start, u64 num_bytes, u64 min_size,
3351 loff_t actual_len, u64 *alloc_hint);
3352 int btrfs_prealloc_file_range_trans(struct inode *inode,
3353 struct btrfs_trans_handle *trans, int mode,
3354 u64 start, u64 num_bytes, u64 min_size,
3355 loff_t actual_len, u64 *alloc_hint);
3356 extern const struct dentry_operations btrfs_dentry_operations;
3359 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3360 void btrfs_update_iflags(struct inode *inode);
3361 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3362 int btrfs_defrag_file(struct inode *inode, struct file *file,
3363 struct btrfs_ioctl_defrag_range_args *range,
3364 u64 newer_than, unsigned long max_pages);
3366 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3367 struct inode *inode);
3368 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3369 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3370 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3372 int btrfs_replace_extent_cache(struct inode *inode, struct extent_map *replace,
3373 u64 start, u64 end, int skip_pinned,
3375 extern const struct file_operations btrfs_file_operations;
3376 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3377 struct btrfs_root *root, struct inode *inode,
3378 struct btrfs_path *path, u64 start, u64 end,
3379 u64 *drop_end, int drop_cache);
3380 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3381 struct btrfs_root *root, struct inode *inode, u64 start,
3382 u64 end, int drop_cache);
3383 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3384 struct inode *inode, u64 start, u64 end);
3385 int btrfs_release_file(struct inode *inode, struct file *file);
3386 void btrfs_drop_pages(struct page **pages, size_t num_pages);
3387 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3388 struct page **pages, size_t num_pages,
3389 loff_t pos, size_t write_bytes,
3390 struct extent_state **cached);
3393 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3394 struct btrfs_root *root, int cache_only);
3397 int btrfs_init_sysfs(void);
3398 void btrfs_exit_sysfs(void);
3401 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3404 int btrfs_parse_options(struct btrfs_root *root, char *options);
3405 int btrfs_sync_fs(struct super_block *sb, int wait);
3407 #ifdef CONFIG_PRINTK
3409 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
3411 static inline __printf(2, 3)
3412 void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...)
3418 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3419 unsigned int line, int errno, const char *fmt, ...);
3422 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3423 struct btrfs_root *root, const char *function,
3424 unsigned int line, int errno);
3426 #define btrfs_set_fs_incompat(__fs_info, opt) \
3427 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3429 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3432 struct btrfs_super_block *disk_super;
3435 disk_super = fs_info->super_copy;
3436 features = btrfs_super_incompat_flags(disk_super);
3437 if (!(features & flag)) {
3439 btrfs_set_super_incompat_flags(disk_super, features);
3444 * Call btrfs_abort_transaction as early as possible when an error condition is
3445 * detected, that way the exact line number is reported.
3448 #define btrfs_abort_transaction(trans, root, errno) \
3450 __btrfs_abort_transaction(trans, root, __func__, \
3454 #define btrfs_std_error(fs_info, errno) \
3457 __btrfs_std_error((fs_info), __func__, \
3458 __LINE__, (errno), NULL); \
3461 #define btrfs_error(fs_info, errno, fmt, args...) \
3463 __btrfs_std_error((fs_info), __func__, __LINE__, \
3464 (errno), fmt, ##args); \
3468 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3469 unsigned int line, int errno, const char *fmt, ...);
3471 #define btrfs_panic(fs_info, errno, fmt, args...) \
3473 struct btrfs_fs_info *_i = (fs_info); \
3474 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3475 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
3479 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3480 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3481 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3482 struct inode *inode, struct inode *dir);
3483 int btrfs_acl_chmod(struct inode *inode);
3485 #define btrfs_get_acl NULL
3486 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3487 struct inode *inode, struct inode *dir)
3491 static inline int btrfs_acl_chmod(struct inode *inode)
3498 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3499 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3500 struct btrfs_root *root);
3501 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3502 struct btrfs_root *root);
3503 int btrfs_recover_relocation(struct btrfs_root *root);
3504 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3505 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3506 struct btrfs_root *root, struct extent_buffer *buf,
3507 struct extent_buffer *cow);
3508 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
3509 struct btrfs_pending_snapshot *pending,
3510 u64 *bytes_to_reserve);
3511 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3512 struct btrfs_pending_snapshot *pending);
3515 int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
3516 struct btrfs_scrub_progress *progress, int readonly);
3517 void btrfs_scrub_pause(struct btrfs_root *root);
3518 void btrfs_scrub_pause_super(struct btrfs_root *root);
3519 void btrfs_scrub_continue(struct btrfs_root *root);
3520 void btrfs_scrub_continue_super(struct btrfs_root *root);
3521 int __btrfs_scrub_cancel(struct btrfs_fs_info *info);
3522 int btrfs_scrub_cancel(struct btrfs_root *root);
3523 int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
3524 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
3525 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3526 struct btrfs_scrub_progress *progress);
3529 struct reada_control {
3530 struct btrfs_root *root; /* tree to prefetch */
3531 struct btrfs_key key_start;
3532 struct btrfs_key key_end; /* exclusive */
3535 wait_queue_head_t wait;
3537 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3538 struct btrfs_key *start, struct btrfs_key *end);
3539 int btrfs_reada_wait(void *handle);
3540 void btrfs_reada_detach(void *handle);
3541 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
3542 u64 start, int err);
3545 struct qgroup_update {
3546 struct list_head list;
3547 struct btrfs_delayed_ref_node *node;
3548 struct btrfs_delayed_extent_op *extent_op;
3551 int btrfs_quota_enable(struct btrfs_trans_handle *trans,
3552 struct btrfs_fs_info *fs_info);
3553 int btrfs_quota_disable(struct btrfs_trans_handle *trans,
3554 struct btrfs_fs_info *fs_info);
3555 int btrfs_quota_rescan(struct btrfs_fs_info *fs_info);
3556 int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
3557 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3558 int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
3559 struct btrfs_fs_info *fs_info, u64 src, u64 dst);
3560 int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
3561 struct btrfs_fs_info *fs_info, u64 qgroupid,
3563 int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
3564 struct btrfs_fs_info *fs_info, u64 qgroupid);
3565 int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
3566 struct btrfs_fs_info *fs_info, u64 qgroupid,
3567 struct btrfs_qgroup_limit *limit);
3568 int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
3569 void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
3570 struct btrfs_delayed_extent_op;
3571 int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
3572 struct btrfs_delayed_ref_node *node,
3573 struct btrfs_delayed_extent_op *extent_op);
3574 int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
3575 struct btrfs_fs_info *fs_info,
3576 struct btrfs_delayed_ref_node *node,
3577 struct btrfs_delayed_extent_op *extent_op);
3578 int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
3579 struct btrfs_fs_info *fs_info);
3580 int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
3581 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
3582 struct btrfs_qgroup_inherit *inherit);
3583 int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
3584 void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);
3586 void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
3588 static inline int is_fstree(u64 rootid)
3590 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3591 (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)