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_LEVEL 8
53 #define BTRFS_COMPAT_EXTENT_TREE_V0
56 * files bigger than this get some pre-flushing when they are added
57 * to the ordered operations list. That way we limit the total
58 * work done by the commit
60 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
62 /* holds pointers to all of the tree roots */
63 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
65 /* stores information about which extents are in use, and reference counts */
66 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
69 * chunk tree stores translations from logical -> physical block numbering
70 * the super block points to the chunk tree
72 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
75 * stores information about which areas of a given device are in use.
76 * one per device. The tree of tree roots points to the device tree
78 #define BTRFS_DEV_TREE_OBJECTID 4ULL
80 /* one per subvolume, storing files and directories */
81 #define BTRFS_FS_TREE_OBJECTID 5ULL
83 /* directory objectid inside the root tree */
84 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
86 /* holds checksums of all the data extents */
87 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
89 /* orhpan objectid for tracking unlinked/truncated files */
90 #define BTRFS_ORPHAN_OBJECTID -5ULL
92 /* does write ahead logging to speed up fsyncs */
93 #define BTRFS_TREE_LOG_OBJECTID -6ULL
94 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
96 /* for space balancing */
97 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
98 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
101 * extent checksums all have this objectid
102 * this allows them to share the logging tree
105 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
107 /* For storing free space cache */
108 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
111 * The inode number assigned to the special inode for sotring
114 #define BTRFS_FREE_INO_OBJECTID -12ULL
116 /* dummy objectid represents multiple objectids */
117 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
120 * All files have objectids in this range.
122 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
123 #define BTRFS_LAST_FREE_OBJECTID -256ULL
124 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
128 * the device items go into the chunk tree. The key is in the form
129 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
131 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
133 #define BTRFS_BTREE_INODE_OBJECTID 1
135 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
138 * we can actually store much bigger names, but lets not confuse the rest
141 #define BTRFS_NAME_LEN 255
143 /* 32 bytes in various csum fields */
144 #define BTRFS_CSUM_SIZE 32
147 #define BTRFS_CSUM_TYPE_CRC32 0
149 static int btrfs_csum_sizes[] = { 4, 0 };
151 /* four bytes for CRC32 */
152 #define BTRFS_EMPTY_DIR_SIZE 0
154 #define BTRFS_FT_UNKNOWN 0
155 #define BTRFS_FT_REG_FILE 1
156 #define BTRFS_FT_DIR 2
157 #define BTRFS_FT_CHRDEV 3
158 #define BTRFS_FT_BLKDEV 4
159 #define BTRFS_FT_FIFO 5
160 #define BTRFS_FT_SOCK 6
161 #define BTRFS_FT_SYMLINK 7
162 #define BTRFS_FT_XATTR 8
163 #define BTRFS_FT_MAX 9
166 * The key defines the order in the tree, and so it also defines (optimal)
169 * objectid corresponds to the inode number.
171 * type tells us things about the object, and is a kind of stream selector.
172 * so for a given inode, keys with type of 1 might refer to the inode data,
173 * type of 2 may point to file data in the btree and type == 3 may point to
176 * offset is the starting byte offset for this key in the stream.
178 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
179 * in cpu native order. Otherwise they are identical and their sizes
180 * should be the same (ie both packed)
182 struct btrfs_disk_key {
186 } __attribute__ ((__packed__));
192 } __attribute__ ((__packed__));
194 struct btrfs_mapping_tree {
195 struct extent_map_tree map_tree;
198 struct btrfs_dev_item {
199 /* the internal btrfs device id */
202 /* size of the device */
208 /* optimal io alignment for this device */
211 /* optimal io width for this device */
214 /* minimal io size for this device */
217 /* type and info about this device */
220 /* expected generation for this device */
224 * starting byte of this partition on the device,
225 * to allow for stripe alignment in the future
229 /* grouping information for allocation decisions */
232 /* seek speed 0-100 where 100 is fastest */
235 /* bandwidth 0-100 where 100 is fastest */
238 /* btrfs generated uuid for this device */
239 u8 uuid[BTRFS_UUID_SIZE];
241 /* uuid of FS who owns this device */
242 u8 fsid[BTRFS_UUID_SIZE];
243 } __attribute__ ((__packed__));
245 struct btrfs_stripe {
248 u8 dev_uuid[BTRFS_UUID_SIZE];
249 } __attribute__ ((__packed__));
252 /* size of this chunk in bytes */
255 /* objectid of the root referencing this chunk */
261 /* optimal io alignment for this chunk */
264 /* optimal io width for this chunk */
267 /* minimal io size for this chunk */
270 /* 2^16 stripes is quite a lot, a second limit is the size of a single
275 /* sub stripes only matter for raid10 */
277 struct btrfs_stripe stripe;
278 /* additional stripes go here */
279 } __attribute__ ((__packed__));
281 #define BTRFS_FREE_SPACE_EXTENT 1
282 #define BTRFS_FREE_SPACE_BITMAP 2
284 struct btrfs_free_space_entry {
288 } __attribute__ ((__packed__));
290 struct btrfs_free_space_header {
291 struct btrfs_disk_key location;
295 } __attribute__ ((__packed__));
297 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
299 BUG_ON(num_stripes == 0);
300 return sizeof(struct btrfs_chunk) +
301 sizeof(struct btrfs_stripe) * (num_stripes - 1);
304 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
305 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
311 /* Errors detected */
312 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
314 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
315 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
317 #define BTRFS_BACKREF_REV_MAX 256
318 #define BTRFS_BACKREF_REV_SHIFT 56
319 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
320 BTRFS_BACKREF_REV_SHIFT)
322 #define BTRFS_OLD_BACKREF_REV 0
323 #define BTRFS_MIXED_BACKREF_REV 1
326 * every tree block (leaf or node) starts with this header.
328 struct btrfs_header {
329 /* these first four must match the super block */
330 u8 csum[BTRFS_CSUM_SIZE];
331 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
332 __le64 bytenr; /* which block this node is supposed to live in */
335 /* allowed to be different from the super from here on down */
336 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
341 } __attribute__ ((__packed__));
343 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
344 sizeof(struct btrfs_header)) / \
345 sizeof(struct btrfs_key_ptr))
346 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
347 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
348 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
349 sizeof(struct btrfs_item) - \
350 sizeof(struct btrfs_file_extent_item))
351 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
352 sizeof(struct btrfs_item) -\
353 sizeof(struct btrfs_dir_item))
357 * this is a very generous portion of the super block, giving us
358 * room to translate 14 chunks with 3 stripes each.
360 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
361 #define BTRFS_LABEL_SIZE 256
364 * just in case we somehow lose the roots and are not able to mount,
365 * we store an array of the roots from previous transactions
368 #define BTRFS_NUM_BACKUP_ROOTS 4
369 struct btrfs_root_backup {
371 __le64 tree_root_gen;
374 __le64 chunk_root_gen;
377 __le64 extent_root_gen;
386 __le64 csum_root_gen;
396 u8 extent_root_level;
400 /* future and to align */
402 } __attribute__ ((__packed__));
405 * the super block basically lists the main trees of the FS
406 * it currently lacks any block count etc etc
408 struct btrfs_super_block {
409 u8 csum[BTRFS_CSUM_SIZE];
410 /* the first 4 fields must match struct btrfs_header */
411 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
412 __le64 bytenr; /* this block number */
415 /* allowed to be different from the btrfs_header from here own down */
422 /* this will help find the new super based on the log root */
423 __le64 log_root_transid;
426 __le64 root_dir_objectid;
432 __le32 sys_chunk_array_size;
433 __le64 chunk_root_generation;
435 __le64 compat_ro_flags;
436 __le64 incompat_flags;
441 struct btrfs_dev_item dev_item;
443 char label[BTRFS_LABEL_SIZE];
445 __le64 cache_generation;
447 /* future expansion */
449 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
450 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
451 } __attribute__ ((__packed__));
454 * Compat flags that we support. If any incompat flags are set other than the
455 * ones specified below then we will fail to mount
457 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
458 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
459 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
460 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
462 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
463 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
464 #define BTRFS_FEATURE_INCOMPAT_SUPP \
465 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
466 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
467 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
468 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
471 * A leaf is full of items. offset and size tell us where to find
472 * the item in the leaf (relative to the start of the data area)
475 struct btrfs_disk_key key;
478 } __attribute__ ((__packed__));
481 * leaves have an item area and a data area:
482 * [item0, item1....itemN] [free space] [dataN...data1, data0]
484 * The data is separate from the items to get the keys closer together
488 struct btrfs_header header;
489 struct btrfs_item items[];
490 } __attribute__ ((__packed__));
493 * all non-leaf blocks are nodes, they hold only keys and pointers to
496 struct btrfs_key_ptr {
497 struct btrfs_disk_key key;
500 } __attribute__ ((__packed__));
503 struct btrfs_header header;
504 struct btrfs_key_ptr ptrs[];
505 } __attribute__ ((__packed__));
508 * btrfs_paths remember the path taken from the root down to the leaf.
509 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
510 * to any other levels that are present.
512 * The slots array records the index of the item or block pointer
513 * used while walking the tree.
516 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
517 int slots[BTRFS_MAX_LEVEL];
518 /* if there is real range locking, this locks field will change */
519 int locks[BTRFS_MAX_LEVEL];
521 /* keep some upper locks as we walk down */
525 * set by btrfs_split_item, tells search_slot to keep all locks
526 * and to force calls to keep space in the nodes
528 unsigned int search_for_split:1;
529 unsigned int keep_locks:1;
530 unsigned int skip_locking:1;
531 unsigned int leave_spinning:1;
532 unsigned int search_commit_root:1;
536 * items in the extent btree are used to record the objectid of the
537 * owner of the block and the number of references
540 struct btrfs_extent_item {
544 } __attribute__ ((__packed__));
546 struct btrfs_extent_item_v0 {
548 } __attribute__ ((__packed__));
550 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
551 sizeof(struct btrfs_item))
553 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
554 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
556 /* following flags only apply to tree blocks */
558 /* use full backrefs for extent pointers in the block */
559 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
562 * this flag is only used internally by scrub and may be changed at any time
563 * it is only declared here to avoid collisions
565 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
567 struct btrfs_tree_block_info {
568 struct btrfs_disk_key key;
570 } __attribute__ ((__packed__));
572 struct btrfs_extent_data_ref {
577 } __attribute__ ((__packed__));
579 struct btrfs_shared_data_ref {
581 } __attribute__ ((__packed__));
583 struct btrfs_extent_inline_ref {
586 } __attribute__ ((__packed__));
588 /* old style backrefs item */
589 struct btrfs_extent_ref_v0 {
594 } __attribute__ ((__packed__));
597 /* dev extents record free space on individual devices. The owner
598 * field points back to the chunk allocation mapping tree that allocated
599 * the extent. The chunk tree uuid field is a way to double check the owner
601 struct btrfs_dev_extent {
603 __le64 chunk_objectid;
606 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
607 } __attribute__ ((__packed__));
609 struct btrfs_inode_ref {
613 } __attribute__ ((__packed__));
615 struct btrfs_timespec {
618 } __attribute__ ((__packed__));
620 enum btrfs_compression_type {
621 BTRFS_COMPRESS_NONE = 0,
622 BTRFS_COMPRESS_ZLIB = 1,
623 BTRFS_COMPRESS_LZO = 2,
624 BTRFS_COMPRESS_TYPES = 2,
625 BTRFS_COMPRESS_LAST = 3,
628 struct btrfs_inode_item {
629 /* nfs style generation number */
631 /* transid that last touched this inode */
643 /* modification sequence number for NFS */
647 * a little future expansion, for more than this we can
648 * just grow the inode item and version it
651 struct btrfs_timespec atime;
652 struct btrfs_timespec ctime;
653 struct btrfs_timespec mtime;
654 struct btrfs_timespec otime;
655 } __attribute__ ((__packed__));
657 struct btrfs_dir_log_item {
659 } __attribute__ ((__packed__));
661 struct btrfs_dir_item {
662 struct btrfs_disk_key location;
667 } __attribute__ ((__packed__));
669 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
671 struct btrfs_root_item {
672 struct btrfs_inode_item inode;
678 __le64 last_snapshot;
681 struct btrfs_disk_key drop_progress;
684 } __attribute__ ((__packed__));
687 * this is used for both forward and backward root refs
689 struct btrfs_root_ref {
693 } __attribute__ ((__packed__));
695 #define BTRFS_FILE_EXTENT_INLINE 0
696 #define BTRFS_FILE_EXTENT_REG 1
697 #define BTRFS_FILE_EXTENT_PREALLOC 2
699 struct btrfs_file_extent_item {
701 * transaction id that created this extent
705 * max number of bytes to hold this extent in ram
706 * when we split a compressed extent we can't know how big
707 * each of the resulting pieces will be. So, this is
708 * an upper limit on the size of the extent in ram instead of
714 * 32 bits for the various ways we might encode the data,
715 * including compression and encryption. If any of these
716 * are set to something a given disk format doesn't understand
717 * it is treated like an incompat flag for reading and writing,
722 __le16 other_encoding; /* spare for later use */
724 /* are we inline data or a real extent? */
728 * disk space consumed by the extent, checksum blocks are included
732 __le64 disk_num_bytes;
734 * the logical offset in file blocks (no csums)
735 * this extent record is for. This allows a file extent to point
736 * into the middle of an existing extent on disk, sharing it
737 * between two snapshots (useful if some bytes in the middle of the
738 * extent have changed
742 * the logical number of file blocks (no csums included). This
743 * always reflects the size uncompressed and without encoding.
747 } __attribute__ ((__packed__));
749 struct btrfs_csum_item {
751 } __attribute__ ((__packed__));
753 /* different types of block groups (and chunks) */
754 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
755 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
756 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
757 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
758 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
759 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
760 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
761 #define BTRFS_NR_RAID_TYPES 5
763 struct btrfs_block_group_item {
765 __le64 chunk_objectid;
767 } __attribute__ ((__packed__));
769 struct btrfs_space_info {
772 u64 total_bytes; /* total bytes in the space,
773 this doesn't take mirrors into account */
774 u64 bytes_used; /* total bytes used,
775 this doesn't take mirrors into account */
776 u64 bytes_pinned; /* total bytes pinned, will be freed when the
777 transaction finishes */
778 u64 bytes_reserved; /* total bytes the allocator has reserved for
779 current allocations */
780 u64 bytes_readonly; /* total bytes that are read only */
782 u64 bytes_may_use; /* number of bytes that may be used for
783 delalloc/allocations */
784 u64 disk_used; /* total bytes used on disk */
785 u64 disk_total; /* total bytes on disk, takes mirrors into
789 * we bump reservation progress every time we decrement
790 * bytes_reserved. This way people waiting for reservations
791 * know something good has happened and they can check
792 * for progress. The number here isn't to be trusted, it
793 * just shows reclaim activity
795 unsigned long reservation_progress;
797 unsigned int full:1; /* indicates that we cannot allocate any more
798 chunks for this space */
799 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
801 unsigned int flush:1; /* set if we are trying to make space */
803 unsigned int force_alloc; /* set if we need to force a chunk
804 alloc for this space */
806 struct list_head list;
808 /* for block groups in our same type */
809 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
811 struct rw_semaphore groups_sem;
812 wait_queue_head_t wait;
815 struct btrfs_block_rsv {
818 struct btrfs_space_info *space_info;
824 * free clusters are used to claim free space in relatively large chunks,
825 * allowing us to do less seeky writes. They are used for all metadata
826 * allocations and data allocations in ssd mode.
828 struct btrfs_free_cluster {
830 spinlock_t refill_lock;
833 /* largest extent in this cluster */
836 /* first extent starting offset */
839 struct btrfs_block_group_cache *block_group;
841 * when a cluster is allocated from a block group, we put the
842 * cluster onto a list in the block group so that it can
843 * be freed before the block group is freed.
845 struct list_head block_group_list;
848 enum btrfs_caching_type {
850 BTRFS_CACHE_STARTED = 1,
851 BTRFS_CACHE_FAST = 2,
852 BTRFS_CACHE_FINISHED = 3,
855 enum btrfs_disk_cache_state {
856 BTRFS_DC_WRITTEN = 0,
860 BTRFS_DC_NEED_WRITE = 4,
863 struct btrfs_caching_control {
864 struct list_head list;
866 wait_queue_head_t wait;
867 struct btrfs_work work;
868 struct btrfs_block_group_cache *block_group;
873 struct btrfs_block_group_cache {
874 struct btrfs_key key;
875 struct btrfs_block_group_item item;
876 struct btrfs_fs_info *fs_info;
884 u64 cache_generation;
886 unsigned int dirty:1;
889 int disk_cache_state;
891 /* cache tracking stuff */
893 struct btrfs_caching_control *caching_ctl;
894 u64 last_byte_to_unpin;
896 struct btrfs_space_info *space_info;
898 /* free space cache stuff */
899 struct btrfs_free_space_ctl *free_space_ctl;
901 /* block group cache stuff */
902 struct rb_node cache_node;
904 /* for block groups in the same raid type */
905 struct list_head list;
910 /* List of struct btrfs_free_clusters for this block group.
911 * Today it will only have one thing on it, but that may change
913 struct list_head cluster_list;
916 struct reloc_control;
918 struct btrfs_fs_devices;
919 struct btrfs_delayed_root;
920 struct btrfs_fs_info {
921 u8 fsid[BTRFS_FSID_SIZE];
922 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
923 struct btrfs_root *extent_root;
924 struct btrfs_root *tree_root;
925 struct btrfs_root *chunk_root;
926 struct btrfs_root *dev_root;
927 struct btrfs_root *fs_root;
928 struct btrfs_root *csum_root;
930 /* the log root tree is a directory of all the other log roots */
931 struct btrfs_root *log_root_tree;
933 spinlock_t fs_roots_radix_lock;
934 struct radix_tree_root fs_roots_radix;
936 /* block group cache stuff */
937 spinlock_t block_group_cache_lock;
938 struct rb_root block_group_cache_tree;
940 /* keep track of unallocated space */
941 spinlock_t free_chunk_lock;
942 u64 free_chunk_space;
944 struct extent_io_tree freed_extents[2];
945 struct extent_io_tree *pinned_extents;
947 /* logical->physical extent mapping */
948 struct btrfs_mapping_tree mapping_tree;
951 * block reservation for extent, checksum, root tree and
952 * delayed dir index item
954 struct btrfs_block_rsv global_block_rsv;
955 /* block reservation for delay allocation */
956 struct btrfs_block_rsv delalloc_block_rsv;
957 /* block reservation for metadata operations */
958 struct btrfs_block_rsv trans_block_rsv;
959 /* block reservation for chunk tree */
960 struct btrfs_block_rsv chunk_block_rsv;
961 /* block reservation for delayed operations */
962 struct btrfs_block_rsv delayed_block_rsv;
964 struct btrfs_block_rsv empty_block_rsv;
967 u64 last_trans_committed;
970 * this is updated to the current trans every time a full commit
971 * is required instead of the faster short fsync log commits
973 u64 last_trans_log_full_commit;
974 unsigned long mount_opt:21;
975 unsigned long compress_type:4;
978 struct btrfs_transaction *running_transaction;
979 wait_queue_head_t transaction_throttle;
980 wait_queue_head_t transaction_wait;
981 wait_queue_head_t transaction_blocked_wait;
982 wait_queue_head_t async_submit_wait;
984 struct btrfs_super_block *super_copy;
985 struct btrfs_super_block *super_for_commit;
986 struct block_device *__bdev;
987 struct super_block *sb;
988 struct inode *btree_inode;
989 struct backing_dev_info bdi;
990 struct mutex tree_log_mutex;
991 struct mutex transaction_kthread_mutex;
992 struct mutex cleaner_mutex;
993 struct mutex chunk_mutex;
994 struct mutex volume_mutex;
996 * this protects the ordered operations list only while we are
997 * processing all of the entries on it. This way we make
998 * sure the commit code doesn't find the list temporarily empty
999 * because another function happens to be doing non-waiting preflush
1000 * before jumping into the main commit.
1002 struct mutex ordered_operations_mutex;
1003 struct rw_semaphore extent_commit_sem;
1005 struct rw_semaphore cleanup_work_sem;
1007 struct rw_semaphore subvol_sem;
1008 struct srcu_struct subvol_srcu;
1010 spinlock_t trans_lock;
1012 * the reloc mutex goes with the trans lock, it is taken
1013 * during commit to protect us from the relocation code
1015 struct mutex reloc_mutex;
1017 struct list_head trans_list;
1018 struct list_head hashers;
1019 struct list_head dead_roots;
1020 struct list_head caching_block_groups;
1022 spinlock_t delayed_iput_lock;
1023 struct list_head delayed_iputs;
1025 atomic_t nr_async_submits;
1026 atomic_t async_submit_draining;
1027 atomic_t nr_async_bios;
1028 atomic_t async_delalloc_pages;
1029 atomic_t open_ioctl_trans;
1032 * this is used by the balancing code to wait for all the pending
1035 spinlock_t ordered_extent_lock;
1038 * all of the data=ordered extents pending writeback
1039 * these can span multiple transactions and basically include
1040 * every dirty data page that isn't from nodatacow
1042 struct list_head ordered_extents;
1045 * all of the inodes that have delalloc bytes. It is possible for
1046 * this list to be empty even when there is still dirty data=ordered
1047 * extents waiting to finish IO.
1049 struct list_head delalloc_inodes;
1052 * special rename and truncate targets that must be on disk before
1053 * we're allowed to commit. This is basically the ext3 style
1054 * data=ordered list.
1056 struct list_head ordered_operations;
1059 * there is a pool of worker threads for checksumming during writes
1060 * and a pool for checksumming after reads. This is because readers
1061 * can run with FS locks held, and the writers may be waiting for
1062 * those locks. We don't want ordering in the pending list to cause
1063 * deadlocks, and so the two are serviced separately.
1065 * A third pool does submit_bio to avoid deadlocking with the other
1068 struct btrfs_workers generic_worker;
1069 struct btrfs_workers workers;
1070 struct btrfs_workers delalloc_workers;
1071 struct btrfs_workers endio_workers;
1072 struct btrfs_workers endio_meta_workers;
1073 struct btrfs_workers endio_meta_write_workers;
1074 struct btrfs_workers endio_write_workers;
1075 struct btrfs_workers endio_freespace_worker;
1076 struct btrfs_workers submit_workers;
1077 struct btrfs_workers caching_workers;
1078 struct btrfs_workers readahead_workers;
1081 * fixup workers take dirty pages that didn't properly go through
1082 * the cow mechanism and make them safe to write. It happens
1083 * for the sys_munmap function call path
1085 struct btrfs_workers fixup_workers;
1086 struct btrfs_workers delayed_workers;
1087 struct task_struct *transaction_kthread;
1088 struct task_struct *cleaner_kthread;
1089 int thread_pool_size;
1091 struct kobject super_kobj;
1092 struct completion kobj_unregister;
1095 int log_root_recovering;
1101 /* protected by the delalloc lock, used to keep from writing
1102 * metadata until there is a nice batch
1104 u64 dirty_metadata_bytes;
1105 struct list_head dirty_cowonly_roots;
1107 struct btrfs_fs_devices *fs_devices;
1110 * the space_info list is almost entirely read only. It only changes
1111 * when we add a new raid type to the FS, and that happens
1112 * very rarely. RCU is used to protect it.
1114 struct list_head space_info;
1116 struct reloc_control *reloc_ctl;
1118 spinlock_t delalloc_lock;
1121 /* data_alloc_cluster is only used in ssd mode */
1122 struct btrfs_free_cluster data_alloc_cluster;
1124 /* all metadata allocations go through this cluster */
1125 struct btrfs_free_cluster meta_alloc_cluster;
1127 /* auto defrag inodes go here */
1128 spinlock_t defrag_inodes_lock;
1129 struct rb_root defrag_inodes;
1130 atomic_t defrag_running;
1132 spinlock_t ref_cache_lock;
1133 u64 total_ref_cache_size;
1135 u64 avail_data_alloc_bits;
1136 u64 avail_metadata_alloc_bits;
1137 u64 avail_system_alloc_bits;
1138 u64 data_alloc_profile;
1139 u64 metadata_alloc_profile;
1140 u64 system_alloc_profile;
1142 unsigned data_chunk_allocations;
1143 unsigned metadata_ratio;
1147 /* private scrub information */
1148 struct mutex scrub_lock;
1149 atomic_t scrubs_running;
1150 atomic_t scrub_pause_req;
1151 atomic_t scrubs_paused;
1152 atomic_t scrub_cancel_req;
1153 wait_queue_head_t scrub_pause_wait;
1154 struct rw_semaphore scrub_super_lock;
1155 int scrub_workers_refcnt;
1156 struct btrfs_workers scrub_workers;
1158 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1159 u32 check_integrity_print_mask;
1162 /* filesystem state */
1165 struct btrfs_delayed_root *delayed_root;
1167 /* readahead tree */
1168 spinlock_t reada_lock;
1169 struct radix_tree_root reada_tree;
1171 /* next backup root to be overwritten */
1172 int backup_root_index;
1176 * in ram representation of the tree. extent_root is used for all allocations
1177 * and for the extent tree extent_root root.
1180 struct extent_buffer *node;
1182 struct extent_buffer *commit_root;
1183 struct btrfs_root *log_root;
1184 struct btrfs_root *reloc_root;
1186 struct btrfs_root_item root_item;
1187 struct btrfs_key root_key;
1188 struct btrfs_fs_info *fs_info;
1189 struct extent_io_tree dirty_log_pages;
1191 struct kobject root_kobj;
1192 struct completion kobj_unregister;
1193 struct mutex objectid_mutex;
1195 spinlock_t accounting_lock;
1196 struct btrfs_block_rsv *block_rsv;
1198 /* free ino cache stuff */
1199 struct mutex fs_commit_mutex;
1200 struct btrfs_free_space_ctl *free_ino_ctl;
1201 enum btrfs_caching_type cached;
1202 spinlock_t cache_lock;
1203 wait_queue_head_t cache_wait;
1204 struct btrfs_free_space_ctl *free_ino_pinned;
1206 struct inode *cache_inode;
1208 struct mutex log_mutex;
1209 wait_queue_head_t log_writer_wait;
1210 wait_queue_head_t log_commit_wait[2];
1211 atomic_t log_writers;
1212 atomic_t log_commit[2];
1213 unsigned long log_transid;
1214 unsigned long last_log_commit;
1215 unsigned long log_batch;
1216 pid_t log_start_pid;
1217 bool log_multiple_pids;
1222 /* data allocations are done in sectorsize units */
1225 /* node allocations are done in nodesize units */
1228 /* leaf allocations are done in leafsize units */
1235 u64 highest_objectid;
1237 /* btrfs_record_root_in_trans is a multi-step process,
1238 * and it can race with the balancing code. But the
1239 * race is very small, and only the first time the root
1240 * is added to each transaction. So in_trans_setup
1241 * is used to tell us when more checks are required
1243 unsigned long in_trans_setup;
1248 u64 defrag_trans_start;
1249 struct btrfs_key defrag_progress;
1250 struct btrfs_key defrag_max;
1254 /* the dirty list is only used by non-reference counted roots */
1255 struct list_head dirty_list;
1257 struct list_head root_list;
1259 spinlock_t orphan_lock;
1260 struct list_head orphan_list;
1261 struct btrfs_block_rsv *orphan_block_rsv;
1262 int orphan_item_inserted;
1263 int orphan_cleanup_state;
1265 spinlock_t inode_lock;
1266 /* red-black tree that keeps track of in-memory inodes */
1267 struct rb_root inode_tree;
1270 * radix tree that keeps track of delayed nodes of every inode,
1271 * protected by inode_lock
1273 struct radix_tree_root delayed_nodes_tree;
1275 * right now this just gets used so that a root has its own devid
1276 * for stat. It may be used for more later
1283 struct btrfs_ioctl_defrag_range_args {
1284 /* start of the defrag operation */
1287 /* number of bytes to defrag, use (u64)-1 to say all */
1291 * flags for the operation, which can include turning
1292 * on compression for this one defrag
1297 * any extent bigger than this will be considered
1298 * already defragged. Use 0 to take the kernel default
1299 * Use 1 to say every single extent must be rewritten
1301 __u32 extent_thresh;
1304 * which compression method to use if turning on compression
1305 * for this defrag operation. If unspecified, zlib will
1308 __u32 compress_type;
1310 /* spare for later */
1316 * inode items have the data typically returned from stat and store other
1317 * info about object characteristics. There is one for every file and dir in
1320 #define BTRFS_INODE_ITEM_KEY 1
1321 #define BTRFS_INODE_REF_KEY 12
1322 #define BTRFS_XATTR_ITEM_KEY 24
1323 #define BTRFS_ORPHAN_ITEM_KEY 48
1324 /* reserve 2-15 close to the inode for later flexibility */
1327 * dir items are the name -> inode pointers in a directory. There is one
1328 * for every name in a directory.
1330 #define BTRFS_DIR_LOG_ITEM_KEY 60
1331 #define BTRFS_DIR_LOG_INDEX_KEY 72
1332 #define BTRFS_DIR_ITEM_KEY 84
1333 #define BTRFS_DIR_INDEX_KEY 96
1335 * extent data is for file data
1337 #define BTRFS_EXTENT_DATA_KEY 108
1340 * extent csums are stored in a separate tree and hold csums for
1341 * an entire extent on disk.
1343 #define BTRFS_EXTENT_CSUM_KEY 128
1346 * root items point to tree roots. They are typically in the root
1347 * tree used by the super block to find all the other trees
1349 #define BTRFS_ROOT_ITEM_KEY 132
1352 * root backrefs tie subvols and snapshots to the directory entries that
1355 #define BTRFS_ROOT_BACKREF_KEY 144
1358 * root refs make a fast index for listing all of the snapshots and
1359 * subvolumes referenced by a given root. They point directly to the
1360 * directory item in the root that references the subvol
1362 #define BTRFS_ROOT_REF_KEY 156
1365 * extent items are in the extent map tree. These record which blocks
1366 * are used, and how many references there are to each block
1368 #define BTRFS_EXTENT_ITEM_KEY 168
1370 #define BTRFS_TREE_BLOCK_REF_KEY 176
1372 #define BTRFS_EXTENT_DATA_REF_KEY 178
1374 #define BTRFS_EXTENT_REF_V0_KEY 180
1376 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1378 #define BTRFS_SHARED_DATA_REF_KEY 184
1381 * block groups give us hints into the extent allocation trees. Which
1382 * blocks are free etc etc
1384 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1386 #define BTRFS_DEV_EXTENT_KEY 204
1387 #define BTRFS_DEV_ITEM_KEY 216
1388 #define BTRFS_CHUNK_ITEM_KEY 228
1391 * string items are for debugging. They just store a short string of
1394 #define BTRFS_STRING_ITEM_KEY 253
1397 * Flags for mount options.
1399 * Note: don't forget to add new options to btrfs_show_options()
1401 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1402 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1403 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1404 #define BTRFS_MOUNT_SSD (1 << 3)
1405 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1406 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1407 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1408 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1409 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1410 #define BTRFS_MOUNT_NOSSD (1 << 9)
1411 #define BTRFS_MOUNT_DISCARD (1 << 10)
1412 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1413 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1414 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1415 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1416 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1417 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1418 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1419 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1420 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 19)
1421 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 20)
1423 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1424 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1425 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1430 #define BTRFS_INODE_NODATASUM (1 << 0)
1431 #define BTRFS_INODE_NODATACOW (1 << 1)
1432 #define BTRFS_INODE_READONLY (1 << 2)
1433 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1434 #define BTRFS_INODE_PREALLOC (1 << 4)
1435 #define BTRFS_INODE_SYNC (1 << 5)
1436 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1437 #define BTRFS_INODE_APPEND (1 << 7)
1438 #define BTRFS_INODE_NODUMP (1 << 8)
1439 #define BTRFS_INODE_NOATIME (1 << 9)
1440 #define BTRFS_INODE_DIRSYNC (1 << 10)
1441 #define BTRFS_INODE_COMPRESS (1 << 11)
1443 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1445 /* some macros to generate set/get funcs for the struct fields. This
1446 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1449 #define le8_to_cpu(v) (v)
1450 #define cpu_to_le8(v) (v)
1453 #define read_eb_member(eb, ptr, type, member, result) ( \
1454 read_extent_buffer(eb, (char *)(result), \
1455 ((unsigned long)(ptr)) + \
1456 offsetof(type, member), \
1457 sizeof(((type *)0)->member)))
1459 #define write_eb_member(eb, ptr, type, member, result) ( \
1460 write_extent_buffer(eb, (char *)(result), \
1461 ((unsigned long)(ptr)) + \
1462 offsetof(type, member), \
1463 sizeof(((type *)0)->member)))
1465 #ifndef BTRFS_SETGET_FUNCS
1466 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1467 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1468 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1471 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1472 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1474 type *p = page_address(eb->first_page); \
1475 u##bits res = le##bits##_to_cpu(p->member); \
1478 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1481 type *p = page_address(eb->first_page); \
1482 p->member = cpu_to_le##bits(val); \
1485 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1486 static inline u##bits btrfs_##name(type *s) \
1488 return le##bits##_to_cpu(s->member); \
1490 static inline void btrfs_set_##name(type *s, u##bits val) \
1492 s->member = cpu_to_le##bits(val); \
1495 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1496 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1497 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1498 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1499 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1500 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1502 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1503 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1504 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1505 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1506 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1507 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1509 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1510 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1512 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1514 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1516 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1518 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1520 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1521 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1523 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1525 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1527 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1530 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1532 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1535 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1537 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1540 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1541 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1542 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1543 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1544 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1545 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1546 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1547 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1548 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1549 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1550 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1552 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1554 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1557 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1558 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1559 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1561 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1563 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1565 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1567 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1568 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1570 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1572 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1573 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1575 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1578 unsigned long offset = (unsigned long)c;
1579 offset += offsetof(struct btrfs_chunk, stripe);
1580 offset += nr * sizeof(struct btrfs_stripe);
1581 return (struct btrfs_stripe *)offset;
1584 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1586 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1589 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1590 struct btrfs_chunk *c, int nr)
1592 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1595 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1596 struct btrfs_chunk *c, int nr)
1598 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1601 /* struct btrfs_block_group_item */
1602 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1604 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1606 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1607 struct btrfs_block_group_item, chunk_objectid, 64);
1609 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1610 struct btrfs_block_group_item, chunk_objectid, 64);
1611 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1612 struct btrfs_block_group_item, flags, 64);
1613 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1614 struct btrfs_block_group_item, flags, 64);
1616 /* struct btrfs_inode_ref */
1617 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1618 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1620 /* struct btrfs_inode_item */
1621 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1622 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1623 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1624 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1625 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1626 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1627 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1628 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1629 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1630 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1631 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1632 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1634 static inline struct btrfs_timespec *
1635 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1637 unsigned long ptr = (unsigned long)inode_item;
1638 ptr += offsetof(struct btrfs_inode_item, atime);
1639 return (struct btrfs_timespec *)ptr;
1642 static inline struct btrfs_timespec *
1643 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1645 unsigned long ptr = (unsigned long)inode_item;
1646 ptr += offsetof(struct btrfs_inode_item, mtime);
1647 return (struct btrfs_timespec *)ptr;
1650 static inline struct btrfs_timespec *
1651 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1653 unsigned long ptr = (unsigned long)inode_item;
1654 ptr += offsetof(struct btrfs_inode_item, ctime);
1655 return (struct btrfs_timespec *)ptr;
1658 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1659 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1661 /* struct btrfs_dev_extent */
1662 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1664 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1665 chunk_objectid, 64);
1666 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1668 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1670 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1672 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1673 return (u8 *)((unsigned long)dev + ptr);
1676 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1677 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1679 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1681 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1684 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1686 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1687 struct btrfs_tree_block_info *item,
1688 struct btrfs_disk_key *key)
1690 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1693 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1694 struct btrfs_tree_block_info *item,
1695 struct btrfs_disk_key *key)
1697 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1700 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1702 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1704 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1706 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1709 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1712 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1714 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1717 static inline u32 btrfs_extent_inline_ref_size(int type)
1719 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1720 type == BTRFS_SHARED_BLOCK_REF_KEY)
1721 return sizeof(struct btrfs_extent_inline_ref);
1722 if (type == BTRFS_SHARED_DATA_REF_KEY)
1723 return sizeof(struct btrfs_shared_data_ref) +
1724 sizeof(struct btrfs_extent_inline_ref);
1725 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1726 return sizeof(struct btrfs_extent_data_ref) +
1727 offsetof(struct btrfs_extent_inline_ref, offset);
1732 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1733 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1735 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1736 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1738 /* struct btrfs_node */
1739 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1740 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1742 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1745 ptr = offsetof(struct btrfs_node, ptrs) +
1746 sizeof(struct btrfs_key_ptr) * nr;
1747 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1750 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1754 ptr = offsetof(struct btrfs_node, ptrs) +
1755 sizeof(struct btrfs_key_ptr) * nr;
1756 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1759 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1762 ptr = offsetof(struct btrfs_node, ptrs) +
1763 sizeof(struct btrfs_key_ptr) * nr;
1764 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1767 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1771 ptr = offsetof(struct btrfs_node, ptrs) +
1772 sizeof(struct btrfs_key_ptr) * nr;
1773 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1776 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1778 return offsetof(struct btrfs_node, ptrs) +
1779 sizeof(struct btrfs_key_ptr) * nr;
1782 void btrfs_node_key(struct extent_buffer *eb,
1783 struct btrfs_disk_key *disk_key, int nr);
1785 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1786 struct btrfs_disk_key *disk_key, int nr)
1789 ptr = btrfs_node_key_ptr_offset(nr);
1790 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1791 struct btrfs_key_ptr, key, disk_key);
1794 /* struct btrfs_item */
1795 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1796 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1798 static inline unsigned long btrfs_item_nr_offset(int nr)
1800 return offsetof(struct btrfs_leaf, items) +
1801 sizeof(struct btrfs_item) * nr;
1804 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1807 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1810 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1811 struct btrfs_item *item)
1813 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1816 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1818 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1821 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1823 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1826 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1828 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1831 static inline void btrfs_item_key(struct extent_buffer *eb,
1832 struct btrfs_disk_key *disk_key, int nr)
1834 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1835 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1838 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1839 struct btrfs_disk_key *disk_key, int nr)
1841 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1842 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1845 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1848 * struct btrfs_root_ref
1850 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1851 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1852 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1854 /* struct btrfs_dir_item */
1855 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1856 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1857 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1858 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1860 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1861 struct btrfs_dir_item *item,
1862 struct btrfs_disk_key *key)
1864 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1867 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1868 struct btrfs_dir_item *item,
1869 struct btrfs_disk_key *key)
1871 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1874 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1876 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1878 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1881 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1882 struct btrfs_free_space_header *h,
1883 struct btrfs_disk_key *key)
1885 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1888 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1889 struct btrfs_free_space_header *h,
1890 struct btrfs_disk_key *key)
1892 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1895 /* struct btrfs_disk_key */
1896 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1898 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1899 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1901 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1902 struct btrfs_disk_key *disk)
1904 cpu->offset = le64_to_cpu(disk->offset);
1905 cpu->type = disk->type;
1906 cpu->objectid = le64_to_cpu(disk->objectid);
1909 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1910 struct btrfs_key *cpu)
1912 disk->offset = cpu_to_le64(cpu->offset);
1913 disk->type = cpu->type;
1914 disk->objectid = cpu_to_le64(cpu->objectid);
1917 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1918 struct btrfs_key *key, int nr)
1920 struct btrfs_disk_key disk_key;
1921 btrfs_node_key(eb, &disk_key, nr);
1922 btrfs_disk_key_to_cpu(key, &disk_key);
1925 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1926 struct btrfs_key *key, int nr)
1928 struct btrfs_disk_key disk_key;
1929 btrfs_item_key(eb, &disk_key, nr);
1930 btrfs_disk_key_to_cpu(key, &disk_key);
1933 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1934 struct btrfs_dir_item *item,
1935 struct btrfs_key *key)
1937 struct btrfs_disk_key disk_key;
1938 btrfs_dir_item_key(eb, item, &disk_key);
1939 btrfs_disk_key_to_cpu(key, &disk_key);
1943 static inline u8 btrfs_key_type(struct btrfs_key *key)
1948 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1953 /* struct btrfs_header */
1954 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1955 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1957 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1958 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1959 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1960 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1962 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1964 return (btrfs_header_flags(eb) & flag) == flag;
1967 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1969 u64 flags = btrfs_header_flags(eb);
1970 btrfs_set_header_flags(eb, flags | flag);
1971 return (flags & flag) == flag;
1974 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1976 u64 flags = btrfs_header_flags(eb);
1977 btrfs_set_header_flags(eb, flags & ~flag);
1978 return (flags & flag) == flag;
1981 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1983 u64 flags = btrfs_header_flags(eb);
1984 return flags >> BTRFS_BACKREF_REV_SHIFT;
1987 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1990 u64 flags = btrfs_header_flags(eb);
1991 flags &= ~BTRFS_BACKREF_REV_MASK;
1992 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1993 btrfs_set_header_flags(eb, flags);
1996 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1998 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2002 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2004 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2008 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2010 return btrfs_header_level(eb) == 0;
2013 /* struct btrfs_root_item */
2014 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2016 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2017 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2018 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2020 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2022 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2023 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2024 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2025 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2026 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2027 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2028 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2029 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2032 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2034 return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
2037 /* struct btrfs_root_backup */
2038 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2040 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2042 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2043 tree_root_level, 8);
2045 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2047 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2048 chunk_root_gen, 64);
2049 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2050 chunk_root_level, 8);
2052 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2054 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2055 extent_root_gen, 64);
2056 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2057 extent_root_level, 8);
2059 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2061 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2063 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2066 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2068 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2070 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2073 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2075 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2077 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2078 csum_root_level, 8);
2079 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2081 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2083 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2086 /* struct btrfs_super_block */
2088 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2089 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2090 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2092 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2093 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2094 struct btrfs_super_block, sys_chunk_array_size, 32);
2095 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2096 struct btrfs_super_block, chunk_root_generation, 64);
2097 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2099 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2101 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2102 chunk_root_level, 8);
2103 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2105 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2106 log_root_transid, 64);
2107 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2109 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2111 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2113 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2115 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2117 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2119 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2121 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2122 root_dir_objectid, 64);
2123 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2125 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2127 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2128 compat_ro_flags, 64);
2129 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2130 incompat_flags, 64);
2131 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2133 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2134 cache_generation, 64);
2136 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2138 int t = btrfs_super_csum_type(s);
2139 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2140 return btrfs_csum_sizes[t];
2143 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2145 return offsetof(struct btrfs_leaf, items);
2148 /* struct btrfs_file_extent_item */
2149 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2151 static inline unsigned long
2152 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2154 unsigned long offset = (unsigned long)e;
2155 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2159 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2161 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2164 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2166 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2168 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2169 disk_num_bytes, 64);
2170 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2172 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2174 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2176 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2178 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2180 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2181 other_encoding, 16);
2183 /* this returns the number of file bytes represented by the inline item.
2184 * If an item is compressed, this is the uncompressed size
2186 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2187 struct btrfs_file_extent_item *e)
2189 return btrfs_file_extent_ram_bytes(eb, e);
2193 * this returns the number of bytes used by the item on disk, minus the
2194 * size of any extent headers. If a file is compressed on disk, this is
2195 * the compressed size
2197 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2198 struct btrfs_item *e)
2200 unsigned long offset;
2201 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2202 return btrfs_item_size(eb, e) - offset;
2205 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
2207 return sb->s_fs_info;
2210 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2213 return root->leafsize;
2214 return root->nodesize;
2217 /* helper function to cast into the data area of the leaf. */
2218 #define btrfs_item_ptr(leaf, slot, type) \
2219 ((type *)(btrfs_leaf_data(leaf) + \
2220 btrfs_item_offset_nr(leaf, slot)))
2222 #define btrfs_item_ptr_offset(leaf, slot) \
2223 ((unsigned long)(btrfs_leaf_data(leaf) + \
2224 btrfs_item_offset_nr(leaf, slot)))
2226 static inline struct dentry *fdentry(struct file *file)
2228 return file->f_path.dentry;
2231 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2233 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2234 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2237 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2239 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2243 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2246 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2251 * Doing a truncate won't result in new nodes or leaves, just what we need for
2254 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2257 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2261 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2262 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2263 struct btrfs_root *root, unsigned long count);
2264 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2265 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2266 struct btrfs_root *root, u64 bytenr,
2267 u64 num_bytes, u64 *refs, u64 *flags);
2268 int btrfs_pin_extent(struct btrfs_root *root,
2269 u64 bytenr, u64 num, int reserved);
2270 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2271 struct btrfs_root *root,
2272 u64 bytenr, u64 num_bytes);
2273 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2274 struct btrfs_root *root,
2275 u64 objectid, u64 offset, u64 bytenr);
2276 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2277 struct btrfs_fs_info *info,
2279 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2280 u64 btrfs_find_block_group(struct btrfs_root *root,
2281 u64 search_start, u64 search_hint, int owner);
2282 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2283 struct btrfs_root *root, u32 blocksize,
2284 u64 parent, u64 root_objectid,
2285 struct btrfs_disk_key *key, int level,
2286 u64 hint, u64 empty_size);
2287 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2288 struct btrfs_root *root,
2289 struct extent_buffer *buf,
2290 u64 parent, int last_ref);
2291 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2292 struct btrfs_root *root,
2293 u64 bytenr, u32 blocksize,
2295 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2296 struct btrfs_root *root,
2297 u64 root_objectid, u64 owner,
2298 u64 offset, struct btrfs_key *ins);
2299 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2300 struct btrfs_root *root,
2301 u64 root_objectid, u64 owner, u64 offset,
2302 struct btrfs_key *ins);
2303 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2304 struct btrfs_root *root,
2305 u64 num_bytes, u64 min_alloc_size,
2306 u64 empty_size, u64 hint_byte,
2307 u64 search_end, struct btrfs_key *ins,
2309 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2310 struct extent_buffer *buf, int full_backref);
2311 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2312 struct extent_buffer *buf, int full_backref);
2313 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2314 struct btrfs_root *root,
2315 u64 bytenr, u64 num_bytes, u64 flags,
2317 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2318 struct btrfs_root *root,
2319 u64 bytenr, u64 num_bytes, u64 parent,
2320 u64 root_objectid, u64 owner, u64 offset);
2322 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2323 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2324 u64 start, u64 len);
2325 int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2326 struct btrfs_root *root);
2327 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2328 struct btrfs_root *root);
2329 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2330 struct btrfs_root *root,
2331 u64 bytenr, u64 num_bytes, u64 parent,
2332 u64 root_objectid, u64 owner, u64 offset);
2334 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2335 struct btrfs_root *root);
2336 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2337 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2338 int btrfs_read_block_groups(struct btrfs_root *root);
2339 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2340 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2341 struct btrfs_root *root, u64 bytes_used,
2342 u64 type, u64 chunk_objectid, u64 chunk_offset,
2344 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2345 struct btrfs_root *root, u64 group_start);
2346 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2347 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2348 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2349 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2350 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2351 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2352 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2353 struct btrfs_root *root);
2354 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2355 struct inode *inode);
2356 void btrfs_orphan_release_metadata(struct inode *inode);
2357 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2358 struct btrfs_pending_snapshot *pending);
2359 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2360 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2361 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2362 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2363 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2364 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2365 void btrfs_free_block_rsv(struct btrfs_root *root,
2366 struct btrfs_block_rsv *rsv);
2367 int btrfs_block_rsv_add(struct btrfs_root *root,
2368 struct btrfs_block_rsv *block_rsv,
2370 int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
2371 struct btrfs_block_rsv *block_rsv,
2373 int btrfs_block_rsv_check(struct btrfs_root *root,
2374 struct btrfs_block_rsv *block_rsv, int min_factor);
2375 int btrfs_block_rsv_refill(struct btrfs_root *root,
2376 struct btrfs_block_rsv *block_rsv,
2378 int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
2379 struct btrfs_block_rsv *block_rsv,
2381 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2382 struct btrfs_block_rsv *dst_rsv,
2384 void btrfs_block_rsv_release(struct btrfs_root *root,
2385 struct btrfs_block_rsv *block_rsv,
2387 int btrfs_set_block_group_ro(struct btrfs_root *root,
2388 struct btrfs_block_group_cache *cache);
2389 int btrfs_set_block_group_rw(struct btrfs_root *root,
2390 struct btrfs_block_group_cache *cache);
2391 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2392 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2393 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2394 u64 start, u64 end);
2395 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2396 u64 num_bytes, u64 *actual_bytes);
2397 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2398 struct btrfs_root *root, u64 type);
2399 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2401 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2403 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2404 int level, int *slot);
2405 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2406 int btrfs_previous_item(struct btrfs_root *root,
2407 struct btrfs_path *path, u64 min_objectid,
2409 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2410 struct btrfs_root *root, struct btrfs_path *path,
2411 struct btrfs_key *new_key);
2412 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2413 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2414 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2415 struct btrfs_key *key, int lowest_level,
2416 int cache_only, u64 min_trans);
2417 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2418 struct btrfs_key *max_key,
2419 struct btrfs_path *path, int cache_only,
2421 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2422 struct btrfs_root *root, struct extent_buffer *buf,
2423 struct extent_buffer *parent, int parent_slot,
2424 struct extent_buffer **cow_ret);
2425 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2426 struct btrfs_root *root,
2427 struct extent_buffer *buf,
2428 struct extent_buffer **cow_ret, u64 new_root_objectid);
2429 int btrfs_block_can_be_shared(struct btrfs_root *root,
2430 struct extent_buffer *buf);
2431 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2432 *root, struct btrfs_path *path, u32 data_size);
2433 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2434 struct btrfs_root *root,
2435 struct btrfs_path *path,
2436 u32 new_size, int from_end);
2437 int btrfs_split_item(struct btrfs_trans_handle *trans,
2438 struct btrfs_root *root,
2439 struct btrfs_path *path,
2440 struct btrfs_key *new_key,
2441 unsigned long split_offset);
2442 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2443 struct btrfs_root *root,
2444 struct btrfs_path *path,
2445 struct btrfs_key *new_key);
2446 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2447 *root, struct btrfs_key *key, struct btrfs_path *p, int
2449 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2450 struct btrfs_root *root, struct extent_buffer *parent,
2451 int start_slot, int cache_only, u64 *last_ret,
2452 struct btrfs_key *progress);
2453 void btrfs_release_path(struct btrfs_path *p);
2454 struct btrfs_path *btrfs_alloc_path(void);
2455 void btrfs_free_path(struct btrfs_path *p);
2456 void btrfs_set_path_blocking(struct btrfs_path *p);
2457 void btrfs_clear_path_blocking(struct btrfs_path *p,
2458 struct extent_buffer *held, int held_rw);
2459 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2461 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2462 struct btrfs_path *path, int slot, int nr);
2463 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2464 struct btrfs_root *root,
2465 struct btrfs_path *path)
2467 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2470 int setup_items_for_insert(struct btrfs_trans_handle *trans,
2471 struct btrfs_root *root, struct btrfs_path *path,
2472 struct btrfs_key *cpu_key, u32 *data_size,
2473 u32 total_data, u32 total_size, int nr);
2474 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2475 *root, struct btrfs_key *key, void *data, u32 data_size);
2476 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2477 struct btrfs_root *root,
2478 struct btrfs_path *path,
2479 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2481 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2482 struct btrfs_root *root,
2483 struct btrfs_path *path,
2484 struct btrfs_key *key,
2487 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2490 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2491 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2492 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2493 void btrfs_drop_snapshot(struct btrfs_root *root,
2494 struct btrfs_block_rsv *block_rsv, int update_ref);
2495 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2496 struct btrfs_root *root,
2497 struct extent_buffer *node,
2498 struct extent_buffer *parent);
2499 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2502 * Get synced with close_ctree()
2505 return fs_info->closing;
2507 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2509 kfree(fs_info->delayed_root);
2510 kfree(fs_info->extent_root);
2511 kfree(fs_info->tree_root);
2512 kfree(fs_info->chunk_root);
2513 kfree(fs_info->dev_root);
2514 kfree(fs_info->csum_root);
2515 kfree(fs_info->super_copy);
2516 kfree(fs_info->super_for_commit);
2521 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2522 struct btrfs_path *path,
2523 u64 root_id, u64 ref_id);
2524 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2525 struct btrfs_root *tree_root,
2526 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2527 const char *name, int name_len);
2528 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2529 struct btrfs_root *tree_root,
2530 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2531 const char *name, int name_len);
2532 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2533 struct btrfs_key *key);
2534 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2535 *root, struct btrfs_key *key, struct btrfs_root_item
2537 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2538 *root, struct btrfs_key *key, struct btrfs_root_item
2540 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2541 btrfs_root_item *item, struct btrfs_key *key);
2542 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2543 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2544 void btrfs_set_root_node(struct btrfs_root_item *item,
2545 struct extent_buffer *node);
2546 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2549 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2550 struct btrfs_root *root, const char *name,
2551 int name_len, struct inode *dir,
2552 struct btrfs_key *location, u8 type, u64 index);
2553 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2554 struct btrfs_root *root,
2555 struct btrfs_path *path, u64 dir,
2556 const char *name, int name_len,
2558 struct btrfs_dir_item *
2559 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2560 struct btrfs_root *root,
2561 struct btrfs_path *path, u64 dir,
2562 u64 objectid, const char *name, int name_len,
2564 struct btrfs_dir_item *
2565 btrfs_search_dir_index_item(struct btrfs_root *root,
2566 struct btrfs_path *path, u64 dirid,
2567 const char *name, int name_len);
2568 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2569 struct btrfs_path *path,
2570 const char *name, int name_len);
2571 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2572 struct btrfs_root *root,
2573 struct btrfs_path *path,
2574 struct btrfs_dir_item *di);
2575 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2576 struct btrfs_root *root,
2577 struct btrfs_path *path, u64 objectid,
2578 const char *name, u16 name_len,
2579 const void *data, u16 data_len);
2580 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2581 struct btrfs_root *root,
2582 struct btrfs_path *path, u64 dir,
2583 const char *name, u16 name_len,
2585 int verify_dir_item(struct btrfs_root *root,
2586 struct extent_buffer *leaf,
2587 struct btrfs_dir_item *dir_item);
2590 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2591 struct btrfs_root *root, u64 offset);
2592 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2593 struct btrfs_root *root, u64 offset);
2594 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2597 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2598 struct btrfs_root *root,
2599 const char *name, int name_len,
2600 u64 inode_objectid, u64 ref_objectid, u64 index);
2601 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2602 struct btrfs_root *root,
2603 const char *name, int name_len,
2604 u64 inode_objectid, u64 ref_objectid, u64 *index);
2605 struct btrfs_inode_ref *
2606 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2607 struct btrfs_root *root,
2608 struct btrfs_path *path,
2609 const char *name, int name_len,
2610 u64 inode_objectid, u64 ref_objectid, int mod);
2611 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2612 struct btrfs_root *root,
2613 struct btrfs_path *path, u64 objectid);
2614 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2615 *root, struct btrfs_path *path,
2616 struct btrfs_key *location, int mod);
2619 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2620 struct btrfs_root *root, u64 bytenr, u64 len);
2621 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2622 struct bio *bio, u32 *dst);
2623 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2624 struct bio *bio, u64 logical_offset, u32 *dst);
2625 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2626 struct btrfs_root *root,
2627 u64 objectid, u64 pos,
2628 u64 disk_offset, u64 disk_num_bytes,
2629 u64 num_bytes, u64 offset, u64 ram_bytes,
2630 u8 compression, u8 encryption, u16 other_encoding);
2631 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2632 struct btrfs_root *root,
2633 struct btrfs_path *path, u64 objectid,
2634 u64 bytenr, int mod);
2635 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2636 struct btrfs_root *root,
2637 struct btrfs_ordered_sum *sums);
2638 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2639 struct bio *bio, u64 file_start, int contig);
2640 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2641 struct btrfs_root *root,
2642 struct btrfs_path *path,
2643 u64 bytenr, int cow);
2644 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2645 struct btrfs_root *root, struct btrfs_path *path,
2647 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2648 struct list_head *list, int search_commit);
2650 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
2651 size_t pg_offset, u64 start, u64 len,
2654 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2655 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2656 #define ClearPageChecked ClearPageFsMisc
2657 #define SetPageChecked SetPageFsMisc
2658 #define PageChecked PageFsMisc
2661 /* This forces readahead on a given range of bytes in an inode */
2662 static inline void btrfs_force_ra(struct address_space *mapping,
2663 struct file_ra_state *ra, struct file *file,
2664 pgoff_t offset, unsigned long req_size)
2666 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
2669 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2670 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2671 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2672 struct btrfs_root *root,
2673 struct inode *dir, struct inode *inode,
2674 const char *name, int name_len);
2675 int btrfs_add_link(struct btrfs_trans_handle *trans,
2676 struct inode *parent_inode, struct inode *inode,
2677 const char *name, int name_len, int add_backref, u64 index);
2678 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2679 struct btrfs_root *root,
2680 struct inode *dir, u64 objectid,
2681 const char *name, int name_len);
2682 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2683 struct btrfs_root *root,
2684 struct inode *inode, u64 new_size,
2687 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2688 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2689 struct extent_state **cached_state);
2690 int btrfs_writepages(struct address_space *mapping,
2691 struct writeback_control *wbc);
2692 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2693 struct btrfs_root *new_root, u64 new_dirid);
2694 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2695 size_t size, struct bio *bio, unsigned long bio_flags);
2697 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2698 int btrfs_readpage(struct file *file, struct page *page);
2699 void btrfs_evict_inode(struct inode *inode);
2700 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2701 int btrfs_dirty_inode(struct inode *inode);
2702 int btrfs_update_time(struct file *file);
2703 struct inode *btrfs_alloc_inode(struct super_block *sb);
2704 void btrfs_destroy_inode(struct inode *inode);
2705 int btrfs_drop_inode(struct inode *inode);
2706 int btrfs_init_cachep(void);
2707 void btrfs_destroy_cachep(void);
2708 long btrfs_ioctl_trans_end(struct file *file);
2709 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2710 struct btrfs_root *root, int *was_new);
2711 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2712 size_t pg_offset, u64 start, u64 end,
2714 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2715 struct btrfs_root *root,
2716 struct inode *inode);
2717 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2718 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2719 int btrfs_orphan_cleanup(struct btrfs_root *root);
2720 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2721 struct btrfs_root *root);
2722 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2723 int btrfs_invalidate_inodes(struct btrfs_root *root);
2724 void btrfs_add_delayed_iput(struct inode *inode);
2725 void btrfs_run_delayed_iputs(struct btrfs_root *root);
2726 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2727 u64 start, u64 num_bytes, u64 min_size,
2728 loff_t actual_len, u64 *alloc_hint);
2729 int btrfs_prealloc_file_range_trans(struct inode *inode,
2730 struct btrfs_trans_handle *trans, int mode,
2731 u64 start, u64 num_bytes, u64 min_size,
2732 loff_t actual_len, u64 *alloc_hint);
2733 extern const struct dentry_operations btrfs_dentry_operations;
2736 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2737 void btrfs_update_iflags(struct inode *inode);
2738 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
2739 int btrfs_defrag_file(struct inode *inode, struct file *file,
2740 struct btrfs_ioctl_defrag_range_args *range,
2741 u64 newer_than, unsigned long max_pages);
2743 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2744 struct inode *inode);
2745 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2746 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2747 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2749 extern const struct file_operations btrfs_file_operations;
2750 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2751 u64 start, u64 end, u64 *hint_byte, int drop_cache);
2752 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2753 struct inode *inode, u64 start, u64 end);
2754 int btrfs_release_file(struct inode *inode, struct file *file);
2755 void btrfs_drop_pages(struct page **pages, size_t num_pages);
2756 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
2757 struct page **pages, size_t num_pages,
2758 loff_t pos, size_t write_bytes,
2759 struct extent_state **cached);
2762 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2763 struct btrfs_root *root, int cache_only);
2766 int btrfs_init_sysfs(void);
2767 void btrfs_exit_sysfs(void);
2770 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2773 int btrfs_parse_options(struct btrfs_root *root, char *options);
2774 int btrfs_sync_fs(struct super_block *sb, int wait);
2775 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
2776 unsigned int line, int errno);
2778 #define btrfs_std_error(fs_info, errno) \
2781 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2785 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2786 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
2787 int btrfs_init_acl(struct btrfs_trans_handle *trans,
2788 struct inode *inode, struct inode *dir);
2789 int btrfs_acl_chmod(struct inode *inode);
2791 #define btrfs_get_acl NULL
2792 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
2793 struct inode *inode, struct inode *dir)
2797 static inline int btrfs_acl_chmod(struct inode *inode)
2804 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2805 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2806 struct btrfs_root *root);
2807 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2808 struct btrfs_root *root);
2809 int btrfs_recover_relocation(struct btrfs_root *root);
2810 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
2811 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
2812 struct btrfs_root *root, struct extent_buffer *buf,
2813 struct extent_buffer *cow);
2814 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
2815 struct btrfs_pending_snapshot *pending,
2816 u64 *bytes_to_reserve);
2817 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
2818 struct btrfs_pending_snapshot *pending);
2821 int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
2822 struct btrfs_scrub_progress *progress, int readonly);
2823 int btrfs_scrub_pause(struct btrfs_root *root);
2824 int btrfs_scrub_pause_super(struct btrfs_root *root);
2825 int btrfs_scrub_continue(struct btrfs_root *root);
2826 int btrfs_scrub_continue_super(struct btrfs_root *root);
2827 int btrfs_scrub_cancel(struct btrfs_root *root);
2828 int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
2829 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
2830 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
2831 struct btrfs_scrub_progress *progress);
2834 struct reada_control {
2835 struct btrfs_root *root; /* tree to prefetch */
2836 struct btrfs_key key_start;
2837 struct btrfs_key key_end; /* exclusive */
2840 wait_queue_head_t wait;
2842 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
2843 struct btrfs_key *start, struct btrfs_key *end);
2844 int btrfs_reada_wait(void *handle);
2845 void btrfs_reada_detach(void *handle);
2846 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
2847 u64 start, int err);