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_FINISHED = 2,
854 enum btrfs_disk_cache_state {
855 BTRFS_DC_WRITTEN = 0,
859 BTRFS_DC_NEED_WRITE = 4,
862 struct btrfs_caching_control {
863 struct list_head list;
865 wait_queue_head_t wait;
866 struct btrfs_work work;
867 struct btrfs_block_group_cache *block_group;
872 struct btrfs_block_group_cache {
873 struct btrfs_key key;
874 struct btrfs_block_group_item item;
875 struct btrfs_fs_info *fs_info;
883 u64 cache_generation;
885 unsigned int dirty:1;
888 int disk_cache_state;
890 /* cache tracking stuff */
892 struct btrfs_caching_control *caching_ctl;
893 u64 last_byte_to_unpin;
895 struct btrfs_space_info *space_info;
897 /* free space cache stuff */
898 struct btrfs_free_space_ctl *free_space_ctl;
900 /* block group cache stuff */
901 struct rb_node cache_node;
903 /* for block groups in the same raid type */
904 struct list_head list;
909 /* List of struct btrfs_free_clusters for this block group.
910 * Today it will only have one thing on it, but that may change
912 struct list_head cluster_list;
915 struct reloc_control;
917 struct btrfs_fs_devices;
918 struct btrfs_delayed_root;
919 struct btrfs_fs_info {
920 u8 fsid[BTRFS_FSID_SIZE];
921 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
922 struct btrfs_root *extent_root;
923 struct btrfs_root *tree_root;
924 struct btrfs_root *chunk_root;
925 struct btrfs_root *dev_root;
926 struct btrfs_root *fs_root;
927 struct btrfs_root *csum_root;
929 /* the log root tree is a directory of all the other log roots */
930 struct btrfs_root *log_root_tree;
932 spinlock_t fs_roots_radix_lock;
933 struct radix_tree_root fs_roots_radix;
935 /* block group cache stuff */
936 spinlock_t block_group_cache_lock;
937 struct rb_root block_group_cache_tree;
939 /* keep track of unallocated space */
940 spinlock_t free_chunk_lock;
941 u64 free_chunk_space;
943 struct extent_io_tree freed_extents[2];
944 struct extent_io_tree *pinned_extents;
946 /* logical->physical extent mapping */
947 struct btrfs_mapping_tree mapping_tree;
950 * block reservation for extent, checksum, root tree and
951 * delayed dir index item
953 struct btrfs_block_rsv global_block_rsv;
954 /* block reservation for delay allocation */
955 struct btrfs_block_rsv delalloc_block_rsv;
956 /* block reservation for metadata operations */
957 struct btrfs_block_rsv trans_block_rsv;
958 /* block reservation for chunk tree */
959 struct btrfs_block_rsv chunk_block_rsv;
960 /* block reservation for delayed operations */
961 struct btrfs_block_rsv delayed_block_rsv;
963 struct btrfs_block_rsv empty_block_rsv;
966 u64 last_trans_committed;
969 * this is updated to the current trans every time a full commit
970 * is required instead of the faster short fsync log commits
972 u64 last_trans_log_full_commit;
973 unsigned long mount_opt:20;
974 unsigned long compress_type:4;
977 struct btrfs_transaction *running_transaction;
978 wait_queue_head_t transaction_throttle;
979 wait_queue_head_t transaction_wait;
980 wait_queue_head_t transaction_blocked_wait;
981 wait_queue_head_t async_submit_wait;
983 struct btrfs_super_block *super_copy;
984 struct btrfs_super_block *super_for_commit;
985 struct block_device *__bdev;
986 struct super_block *sb;
987 struct inode *btree_inode;
988 struct backing_dev_info bdi;
989 struct mutex tree_log_mutex;
990 struct mutex transaction_kthread_mutex;
991 struct mutex cleaner_mutex;
992 struct mutex chunk_mutex;
993 struct mutex volume_mutex;
995 * this protects the ordered operations list only while we are
996 * processing all of the entries on it. This way we make
997 * sure the commit code doesn't find the list temporarily empty
998 * because another function happens to be doing non-waiting preflush
999 * before jumping into the main commit.
1001 struct mutex ordered_operations_mutex;
1002 struct rw_semaphore extent_commit_sem;
1004 struct rw_semaphore cleanup_work_sem;
1006 struct rw_semaphore subvol_sem;
1007 struct srcu_struct subvol_srcu;
1009 spinlock_t trans_lock;
1011 * the reloc mutex goes with the trans lock, it is taken
1012 * during commit to protect us from the relocation code
1014 struct mutex reloc_mutex;
1016 struct list_head trans_list;
1017 struct list_head hashers;
1018 struct list_head dead_roots;
1019 struct list_head caching_block_groups;
1021 spinlock_t delayed_iput_lock;
1022 struct list_head delayed_iputs;
1024 atomic_t nr_async_submits;
1025 atomic_t async_submit_draining;
1026 atomic_t nr_async_bios;
1027 atomic_t async_delalloc_pages;
1028 atomic_t open_ioctl_trans;
1031 * this is used by the balancing code to wait for all the pending
1034 spinlock_t ordered_extent_lock;
1037 * all of the data=ordered extents pending writeback
1038 * these can span multiple transactions and basically include
1039 * every dirty data page that isn't from nodatacow
1041 struct list_head ordered_extents;
1044 * all of the inodes that have delalloc bytes. It is possible for
1045 * this list to be empty even when there is still dirty data=ordered
1046 * extents waiting to finish IO.
1048 struct list_head delalloc_inodes;
1051 * special rename and truncate targets that must be on disk before
1052 * we're allowed to commit. This is basically the ext3 style
1053 * data=ordered list.
1055 struct list_head ordered_operations;
1058 * there is a pool of worker threads for checksumming during writes
1059 * and a pool for checksumming after reads. This is because readers
1060 * can run with FS locks held, and the writers may be waiting for
1061 * those locks. We don't want ordering in the pending list to cause
1062 * deadlocks, and so the two are serviced separately.
1064 * A third pool does submit_bio to avoid deadlocking with the other
1067 struct btrfs_workers generic_worker;
1068 struct btrfs_workers workers;
1069 struct btrfs_workers delalloc_workers;
1070 struct btrfs_workers endio_workers;
1071 struct btrfs_workers endio_meta_workers;
1072 struct btrfs_workers endio_meta_write_workers;
1073 struct btrfs_workers endio_write_workers;
1074 struct btrfs_workers endio_freespace_worker;
1075 struct btrfs_workers submit_workers;
1076 struct btrfs_workers caching_workers;
1077 struct btrfs_workers readahead_workers;
1080 * fixup workers take dirty pages that didn't properly go through
1081 * the cow mechanism and make them safe to write. It happens
1082 * for the sys_munmap function call path
1084 struct btrfs_workers fixup_workers;
1085 struct btrfs_workers delayed_workers;
1086 struct task_struct *transaction_kthread;
1087 struct task_struct *cleaner_kthread;
1088 int thread_pool_size;
1090 struct kobject super_kobj;
1091 struct completion kobj_unregister;
1094 int log_root_recovering;
1100 /* protected by the delalloc lock, used to keep from writing
1101 * metadata until there is a nice batch
1103 u64 dirty_metadata_bytes;
1104 struct list_head dirty_cowonly_roots;
1106 struct btrfs_fs_devices *fs_devices;
1109 * the space_info list is almost entirely read only. It only changes
1110 * when we add a new raid type to the FS, and that happens
1111 * very rarely. RCU is used to protect it.
1113 struct list_head space_info;
1115 struct reloc_control *reloc_ctl;
1117 spinlock_t delalloc_lock;
1120 /* data_alloc_cluster is only used in ssd mode */
1121 struct btrfs_free_cluster data_alloc_cluster;
1123 /* all metadata allocations go through this cluster */
1124 struct btrfs_free_cluster meta_alloc_cluster;
1126 /* auto defrag inodes go here */
1127 spinlock_t defrag_inodes_lock;
1128 struct rb_root defrag_inodes;
1129 atomic_t defrag_running;
1131 spinlock_t ref_cache_lock;
1132 u64 total_ref_cache_size;
1134 u64 avail_data_alloc_bits;
1135 u64 avail_metadata_alloc_bits;
1136 u64 avail_system_alloc_bits;
1137 u64 data_alloc_profile;
1138 u64 metadata_alloc_profile;
1139 u64 system_alloc_profile;
1141 unsigned data_chunk_allocations;
1142 unsigned metadata_ratio;
1146 /* private scrub information */
1147 struct mutex scrub_lock;
1148 atomic_t scrubs_running;
1149 atomic_t scrub_pause_req;
1150 atomic_t scrubs_paused;
1151 atomic_t scrub_cancel_req;
1152 wait_queue_head_t scrub_pause_wait;
1153 struct rw_semaphore scrub_super_lock;
1154 int scrub_workers_refcnt;
1155 struct btrfs_workers scrub_workers;
1157 /* filesystem state */
1160 struct btrfs_delayed_root *delayed_root;
1162 /* readahead tree */
1163 spinlock_t reada_lock;
1164 struct radix_tree_root reada_tree;
1166 /* next backup root to be overwritten */
1167 int backup_root_index;
1171 * in ram representation of the tree. extent_root is used for all allocations
1172 * and for the extent tree extent_root root.
1175 struct extent_buffer *node;
1177 struct extent_buffer *commit_root;
1178 struct btrfs_root *log_root;
1179 struct btrfs_root *reloc_root;
1181 struct btrfs_root_item root_item;
1182 struct btrfs_key root_key;
1183 struct btrfs_fs_info *fs_info;
1184 struct extent_io_tree dirty_log_pages;
1186 struct kobject root_kobj;
1187 struct completion kobj_unregister;
1188 struct mutex objectid_mutex;
1190 spinlock_t accounting_lock;
1191 struct btrfs_block_rsv *block_rsv;
1193 /* free ino cache stuff */
1194 struct mutex fs_commit_mutex;
1195 struct btrfs_free_space_ctl *free_ino_ctl;
1196 enum btrfs_caching_type cached;
1197 spinlock_t cache_lock;
1198 wait_queue_head_t cache_wait;
1199 struct btrfs_free_space_ctl *free_ino_pinned;
1201 struct inode *cache_inode;
1203 struct mutex log_mutex;
1204 wait_queue_head_t log_writer_wait;
1205 wait_queue_head_t log_commit_wait[2];
1206 atomic_t log_writers;
1207 atomic_t log_commit[2];
1208 unsigned long log_transid;
1209 unsigned long last_log_commit;
1210 unsigned long log_batch;
1211 pid_t log_start_pid;
1212 bool log_multiple_pids;
1217 /* data allocations are done in sectorsize units */
1220 /* node allocations are done in nodesize units */
1223 /* leaf allocations are done in leafsize units */
1230 u64 highest_objectid;
1232 /* btrfs_record_root_in_trans is a multi-step process,
1233 * and it can race with the balancing code. But the
1234 * race is very small, and only the first time the root
1235 * is added to each transaction. So in_trans_setup
1236 * is used to tell us when more checks are required
1238 unsigned long in_trans_setup;
1243 u64 defrag_trans_start;
1244 struct btrfs_key defrag_progress;
1245 struct btrfs_key defrag_max;
1249 /* the dirty list is only used by non-reference counted roots */
1250 struct list_head dirty_list;
1252 struct list_head root_list;
1254 spinlock_t orphan_lock;
1255 struct list_head orphan_list;
1256 struct btrfs_block_rsv *orphan_block_rsv;
1257 int orphan_item_inserted;
1258 int orphan_cleanup_state;
1260 spinlock_t inode_lock;
1261 /* red-black tree that keeps track of in-memory inodes */
1262 struct rb_root inode_tree;
1265 * radix tree that keeps track of delayed nodes of every inode,
1266 * protected by inode_lock
1268 struct radix_tree_root delayed_nodes_tree;
1270 * right now this just gets used so that a root has its own devid
1271 * for stat. It may be used for more later
1278 struct btrfs_ioctl_defrag_range_args {
1279 /* start of the defrag operation */
1282 /* number of bytes to defrag, use (u64)-1 to say all */
1286 * flags for the operation, which can include turning
1287 * on compression for this one defrag
1292 * any extent bigger than this will be considered
1293 * already defragged. Use 0 to take the kernel default
1294 * Use 1 to say every single extent must be rewritten
1296 __u32 extent_thresh;
1299 * which compression method to use if turning on compression
1300 * for this defrag operation. If unspecified, zlib will
1303 __u32 compress_type;
1305 /* spare for later */
1311 * inode items have the data typically returned from stat and store other
1312 * info about object characteristics. There is one for every file and dir in
1315 #define BTRFS_INODE_ITEM_KEY 1
1316 #define BTRFS_INODE_REF_KEY 12
1317 #define BTRFS_XATTR_ITEM_KEY 24
1318 #define BTRFS_ORPHAN_ITEM_KEY 48
1319 /* reserve 2-15 close to the inode for later flexibility */
1322 * dir items are the name -> inode pointers in a directory. There is one
1323 * for every name in a directory.
1325 #define BTRFS_DIR_LOG_ITEM_KEY 60
1326 #define BTRFS_DIR_LOG_INDEX_KEY 72
1327 #define BTRFS_DIR_ITEM_KEY 84
1328 #define BTRFS_DIR_INDEX_KEY 96
1330 * extent data is for file data
1332 #define BTRFS_EXTENT_DATA_KEY 108
1335 * extent csums are stored in a separate tree and hold csums for
1336 * an entire extent on disk.
1338 #define BTRFS_EXTENT_CSUM_KEY 128
1341 * root items point to tree roots. They are typically in the root
1342 * tree used by the super block to find all the other trees
1344 #define BTRFS_ROOT_ITEM_KEY 132
1347 * root backrefs tie subvols and snapshots to the directory entries that
1350 #define BTRFS_ROOT_BACKREF_KEY 144
1353 * root refs make a fast index for listing all of the snapshots and
1354 * subvolumes referenced by a given root. They point directly to the
1355 * directory item in the root that references the subvol
1357 #define BTRFS_ROOT_REF_KEY 156
1360 * extent items are in the extent map tree. These record which blocks
1361 * are used, and how many references there are to each block
1363 #define BTRFS_EXTENT_ITEM_KEY 168
1365 #define BTRFS_TREE_BLOCK_REF_KEY 176
1367 #define BTRFS_EXTENT_DATA_REF_KEY 178
1369 #define BTRFS_EXTENT_REF_V0_KEY 180
1371 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1373 #define BTRFS_SHARED_DATA_REF_KEY 184
1376 * block groups give us hints into the extent allocation trees. Which
1377 * blocks are free etc etc
1379 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1381 #define BTRFS_DEV_EXTENT_KEY 204
1382 #define BTRFS_DEV_ITEM_KEY 216
1383 #define BTRFS_CHUNK_ITEM_KEY 228
1386 * string items are for debugging. They just store a short string of
1389 #define BTRFS_STRING_ITEM_KEY 253
1392 * Flags for mount options.
1394 * Note: don't forget to add new options to btrfs_show_options()
1396 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1397 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1398 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1399 #define BTRFS_MOUNT_SSD (1 << 3)
1400 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1401 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1402 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1403 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1404 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1405 #define BTRFS_MOUNT_NOSSD (1 << 9)
1406 #define BTRFS_MOUNT_DISCARD (1 << 10)
1407 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1408 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1409 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1410 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1411 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1412 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1413 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1414 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1416 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1417 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1418 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1423 #define BTRFS_INODE_NODATASUM (1 << 0)
1424 #define BTRFS_INODE_NODATACOW (1 << 1)
1425 #define BTRFS_INODE_READONLY (1 << 2)
1426 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1427 #define BTRFS_INODE_PREALLOC (1 << 4)
1428 #define BTRFS_INODE_SYNC (1 << 5)
1429 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1430 #define BTRFS_INODE_APPEND (1 << 7)
1431 #define BTRFS_INODE_NODUMP (1 << 8)
1432 #define BTRFS_INODE_NOATIME (1 << 9)
1433 #define BTRFS_INODE_DIRSYNC (1 << 10)
1434 #define BTRFS_INODE_COMPRESS (1 << 11)
1436 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1438 /* some macros to generate set/get funcs for the struct fields. This
1439 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1442 #define le8_to_cpu(v) (v)
1443 #define cpu_to_le8(v) (v)
1446 #define read_eb_member(eb, ptr, type, member, result) ( \
1447 read_extent_buffer(eb, (char *)(result), \
1448 ((unsigned long)(ptr)) + \
1449 offsetof(type, member), \
1450 sizeof(((type *)0)->member)))
1452 #define write_eb_member(eb, ptr, type, member, result) ( \
1453 write_extent_buffer(eb, (char *)(result), \
1454 ((unsigned long)(ptr)) + \
1455 offsetof(type, member), \
1456 sizeof(((type *)0)->member)))
1458 #ifndef BTRFS_SETGET_FUNCS
1459 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1460 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1461 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1464 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1465 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1467 type *p = page_address(eb->first_page); \
1468 u##bits res = le##bits##_to_cpu(p->member); \
1471 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1474 type *p = page_address(eb->first_page); \
1475 p->member = cpu_to_le##bits(val); \
1478 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1479 static inline u##bits btrfs_##name(type *s) \
1481 return le##bits##_to_cpu(s->member); \
1483 static inline void btrfs_set_##name(type *s, u##bits val) \
1485 s->member = cpu_to_le##bits(val); \
1488 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1489 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1490 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1491 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1492 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1493 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1495 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1496 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1497 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1498 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1499 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1500 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1502 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1503 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1505 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1507 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1509 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1511 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1513 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1514 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1516 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1518 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1520 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1523 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1525 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1528 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1530 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1533 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1534 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1535 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1536 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1537 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1538 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1539 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1540 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1541 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1542 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1543 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1545 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1547 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1550 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1551 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1552 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1554 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1556 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1558 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1560 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1561 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1563 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1565 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1566 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1568 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1571 unsigned long offset = (unsigned long)c;
1572 offset += offsetof(struct btrfs_chunk, stripe);
1573 offset += nr * sizeof(struct btrfs_stripe);
1574 return (struct btrfs_stripe *)offset;
1577 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1579 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1582 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1583 struct btrfs_chunk *c, int nr)
1585 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1588 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1589 struct btrfs_chunk *c, int nr)
1591 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1594 /* struct btrfs_block_group_item */
1595 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1597 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1599 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1600 struct btrfs_block_group_item, chunk_objectid, 64);
1602 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1603 struct btrfs_block_group_item, chunk_objectid, 64);
1604 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1605 struct btrfs_block_group_item, flags, 64);
1606 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1607 struct btrfs_block_group_item, flags, 64);
1609 /* struct btrfs_inode_ref */
1610 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1611 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1613 /* struct btrfs_inode_item */
1614 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1615 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1616 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1617 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1618 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1619 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1620 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1621 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1622 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1623 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1624 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1625 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1627 static inline struct btrfs_timespec *
1628 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1630 unsigned long ptr = (unsigned long)inode_item;
1631 ptr += offsetof(struct btrfs_inode_item, atime);
1632 return (struct btrfs_timespec *)ptr;
1635 static inline struct btrfs_timespec *
1636 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1638 unsigned long ptr = (unsigned long)inode_item;
1639 ptr += offsetof(struct btrfs_inode_item, mtime);
1640 return (struct btrfs_timespec *)ptr;
1643 static inline struct btrfs_timespec *
1644 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1646 unsigned long ptr = (unsigned long)inode_item;
1647 ptr += offsetof(struct btrfs_inode_item, ctime);
1648 return (struct btrfs_timespec *)ptr;
1651 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1652 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1654 /* struct btrfs_dev_extent */
1655 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1657 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1658 chunk_objectid, 64);
1659 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1661 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1663 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1665 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1666 return (u8 *)((unsigned long)dev + ptr);
1669 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1670 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1672 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1674 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1677 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1679 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1680 struct btrfs_tree_block_info *item,
1681 struct btrfs_disk_key *key)
1683 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1686 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1687 struct btrfs_tree_block_info *item,
1688 struct btrfs_disk_key *key)
1690 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1693 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1695 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1697 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1699 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1702 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1705 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1707 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1710 static inline u32 btrfs_extent_inline_ref_size(int type)
1712 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1713 type == BTRFS_SHARED_BLOCK_REF_KEY)
1714 return sizeof(struct btrfs_extent_inline_ref);
1715 if (type == BTRFS_SHARED_DATA_REF_KEY)
1716 return sizeof(struct btrfs_shared_data_ref) +
1717 sizeof(struct btrfs_extent_inline_ref);
1718 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1719 return sizeof(struct btrfs_extent_data_ref) +
1720 offsetof(struct btrfs_extent_inline_ref, offset);
1725 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1726 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1728 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1729 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1731 /* struct btrfs_node */
1732 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1733 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1735 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1738 ptr = offsetof(struct btrfs_node, ptrs) +
1739 sizeof(struct btrfs_key_ptr) * nr;
1740 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1743 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1747 ptr = offsetof(struct btrfs_node, ptrs) +
1748 sizeof(struct btrfs_key_ptr) * nr;
1749 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1752 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1755 ptr = offsetof(struct btrfs_node, ptrs) +
1756 sizeof(struct btrfs_key_ptr) * nr;
1757 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1760 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1764 ptr = offsetof(struct btrfs_node, ptrs) +
1765 sizeof(struct btrfs_key_ptr) * nr;
1766 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1769 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1771 return offsetof(struct btrfs_node, ptrs) +
1772 sizeof(struct btrfs_key_ptr) * nr;
1775 void btrfs_node_key(struct extent_buffer *eb,
1776 struct btrfs_disk_key *disk_key, int nr);
1778 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1779 struct btrfs_disk_key *disk_key, int nr)
1782 ptr = btrfs_node_key_ptr_offset(nr);
1783 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1784 struct btrfs_key_ptr, key, disk_key);
1787 /* struct btrfs_item */
1788 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1789 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1791 static inline unsigned long btrfs_item_nr_offset(int nr)
1793 return offsetof(struct btrfs_leaf, items) +
1794 sizeof(struct btrfs_item) * nr;
1797 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1800 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1803 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1804 struct btrfs_item *item)
1806 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1809 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1811 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1814 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1816 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1819 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1821 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1824 static inline void btrfs_item_key(struct extent_buffer *eb,
1825 struct btrfs_disk_key *disk_key, int nr)
1827 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1828 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1831 static inline void btrfs_set_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 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1838 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1841 * struct btrfs_root_ref
1843 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1844 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1845 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1847 /* struct btrfs_dir_item */
1848 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1849 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1850 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1851 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1853 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1854 struct btrfs_dir_item *item,
1855 struct btrfs_disk_key *key)
1857 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1860 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1861 struct btrfs_dir_item *item,
1862 struct btrfs_disk_key *key)
1864 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1867 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1869 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1871 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1874 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1875 struct btrfs_free_space_header *h,
1876 struct btrfs_disk_key *key)
1878 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1881 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1882 struct btrfs_free_space_header *h,
1883 struct btrfs_disk_key *key)
1885 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1888 /* struct btrfs_disk_key */
1889 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1891 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1892 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1894 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1895 struct btrfs_disk_key *disk)
1897 cpu->offset = le64_to_cpu(disk->offset);
1898 cpu->type = disk->type;
1899 cpu->objectid = le64_to_cpu(disk->objectid);
1902 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1903 struct btrfs_key *cpu)
1905 disk->offset = cpu_to_le64(cpu->offset);
1906 disk->type = cpu->type;
1907 disk->objectid = cpu_to_le64(cpu->objectid);
1910 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1911 struct btrfs_key *key, int nr)
1913 struct btrfs_disk_key disk_key;
1914 btrfs_node_key(eb, &disk_key, nr);
1915 btrfs_disk_key_to_cpu(key, &disk_key);
1918 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1919 struct btrfs_key *key, int nr)
1921 struct btrfs_disk_key disk_key;
1922 btrfs_item_key(eb, &disk_key, nr);
1923 btrfs_disk_key_to_cpu(key, &disk_key);
1926 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1927 struct btrfs_dir_item *item,
1928 struct btrfs_key *key)
1930 struct btrfs_disk_key disk_key;
1931 btrfs_dir_item_key(eb, item, &disk_key);
1932 btrfs_disk_key_to_cpu(key, &disk_key);
1936 static inline u8 btrfs_key_type(struct btrfs_key *key)
1941 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1946 /* struct btrfs_header */
1947 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1948 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1950 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1951 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1952 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1953 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1955 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1957 return (btrfs_header_flags(eb) & flag) == flag;
1960 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1962 u64 flags = btrfs_header_flags(eb);
1963 btrfs_set_header_flags(eb, flags | flag);
1964 return (flags & flag) == flag;
1967 static inline int btrfs_clear_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_header_backref_rev(struct extent_buffer *eb)
1976 u64 flags = btrfs_header_flags(eb);
1977 return flags >> BTRFS_BACKREF_REV_SHIFT;
1980 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1983 u64 flags = btrfs_header_flags(eb);
1984 flags &= ~BTRFS_BACKREF_REV_MASK;
1985 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1986 btrfs_set_header_flags(eb, flags);
1989 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1991 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1995 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1997 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2001 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2003 return btrfs_header_level(eb) == 0;
2006 /* struct btrfs_root_item */
2007 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2009 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2010 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2011 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2013 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2015 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2016 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2017 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2018 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2019 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2020 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2021 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2022 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2025 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2027 return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
2030 /* struct btrfs_root_backup */
2031 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2033 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2035 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2036 tree_root_level, 8);
2038 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2040 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2041 chunk_root_gen, 64);
2042 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2043 chunk_root_level, 8);
2045 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2047 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2048 extent_root_gen, 64);
2049 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2050 extent_root_level, 8);
2052 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2054 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2056 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2059 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2061 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2063 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2066 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2068 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2070 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2071 csum_root_level, 8);
2072 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2074 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2076 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2079 /* struct btrfs_super_block */
2081 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2082 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2083 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2085 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2086 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2087 struct btrfs_super_block, sys_chunk_array_size, 32);
2088 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2089 struct btrfs_super_block, chunk_root_generation, 64);
2090 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2092 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2094 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2095 chunk_root_level, 8);
2096 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2098 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2099 log_root_transid, 64);
2100 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2102 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2104 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2106 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2108 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2110 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2112 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2114 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2115 root_dir_objectid, 64);
2116 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2118 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2120 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2121 compat_ro_flags, 64);
2122 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2123 incompat_flags, 64);
2124 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2126 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2127 cache_generation, 64);
2129 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2131 int t = btrfs_super_csum_type(s);
2132 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2133 return btrfs_csum_sizes[t];
2136 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2138 return offsetof(struct btrfs_leaf, items);
2141 /* struct btrfs_file_extent_item */
2142 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2144 static inline unsigned long
2145 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2147 unsigned long offset = (unsigned long)e;
2148 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2152 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2154 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2157 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2159 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2161 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2162 disk_num_bytes, 64);
2163 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2165 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2167 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2169 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2171 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2173 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2174 other_encoding, 16);
2176 /* this returns the number of file bytes represented by the inline item.
2177 * If an item is compressed, this is the uncompressed size
2179 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2180 struct btrfs_file_extent_item *e)
2182 return btrfs_file_extent_ram_bytes(eb, e);
2186 * this returns the number of bytes used by the item on disk, minus the
2187 * size of any extent headers. If a file is compressed on disk, this is
2188 * the compressed size
2190 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2191 struct btrfs_item *e)
2193 unsigned long offset;
2194 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2195 return btrfs_item_size(eb, e) - offset;
2198 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
2200 return sb->s_fs_info;
2203 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2206 return root->leafsize;
2207 return root->nodesize;
2210 /* helper function to cast into the data area of the leaf. */
2211 #define btrfs_item_ptr(leaf, slot, type) \
2212 ((type *)(btrfs_leaf_data(leaf) + \
2213 btrfs_item_offset_nr(leaf, slot)))
2215 #define btrfs_item_ptr_offset(leaf, slot) \
2216 ((unsigned long)(btrfs_leaf_data(leaf) + \
2217 btrfs_item_offset_nr(leaf, slot)))
2219 static inline struct dentry *fdentry(struct file *file)
2221 return file->f_path.dentry;
2224 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2226 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2227 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2230 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2232 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2236 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2239 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2244 * Doing a truncate won't result in new nodes or leaves, just what we need for
2247 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2250 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2254 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2255 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2256 struct btrfs_root *root, unsigned long count);
2257 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2258 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2259 struct btrfs_root *root, u64 bytenr,
2260 u64 num_bytes, u64 *refs, u64 *flags);
2261 int btrfs_pin_extent(struct btrfs_root *root,
2262 u64 bytenr, u64 num, int reserved);
2263 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2264 struct btrfs_root *root,
2265 u64 bytenr, u64 num_bytes);
2266 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2267 struct btrfs_root *root,
2268 u64 objectid, u64 offset, u64 bytenr);
2269 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2270 struct btrfs_fs_info *info,
2272 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2273 u64 btrfs_find_block_group(struct btrfs_root *root,
2274 u64 search_start, u64 search_hint, int owner);
2275 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2276 struct btrfs_root *root, u32 blocksize,
2277 u64 parent, u64 root_objectid,
2278 struct btrfs_disk_key *key, int level,
2279 u64 hint, u64 empty_size);
2280 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2281 struct btrfs_root *root,
2282 struct extent_buffer *buf,
2283 u64 parent, int last_ref);
2284 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2285 struct btrfs_root *root,
2286 u64 bytenr, u32 blocksize,
2288 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2289 struct btrfs_root *root,
2290 u64 root_objectid, u64 owner,
2291 u64 offset, struct btrfs_key *ins);
2292 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2293 struct btrfs_root *root,
2294 u64 root_objectid, u64 owner, u64 offset,
2295 struct btrfs_key *ins);
2296 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2297 struct btrfs_root *root,
2298 u64 num_bytes, u64 min_alloc_size,
2299 u64 empty_size, u64 hint_byte,
2300 u64 search_end, struct btrfs_key *ins,
2302 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2303 struct extent_buffer *buf, int full_backref);
2304 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2305 struct extent_buffer *buf, int full_backref);
2306 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2307 struct btrfs_root *root,
2308 u64 bytenr, u64 num_bytes, u64 flags,
2310 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2311 struct btrfs_root *root,
2312 u64 bytenr, u64 num_bytes, u64 parent,
2313 u64 root_objectid, u64 owner, u64 offset);
2315 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2316 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2317 u64 start, u64 len);
2318 int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2319 struct btrfs_root *root);
2320 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2321 struct btrfs_root *root);
2322 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2323 struct btrfs_root *root,
2324 u64 bytenr, u64 num_bytes, u64 parent,
2325 u64 root_objectid, u64 owner, u64 offset);
2327 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2328 struct btrfs_root *root);
2329 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2330 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2331 int btrfs_read_block_groups(struct btrfs_root *root);
2332 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2333 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2334 struct btrfs_root *root, u64 bytes_used,
2335 u64 type, u64 chunk_objectid, u64 chunk_offset,
2337 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2338 struct btrfs_root *root, u64 group_start);
2339 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2340 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2341 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2342 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2343 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2344 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2345 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2346 struct btrfs_root *root);
2347 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2348 struct inode *inode);
2349 void btrfs_orphan_release_metadata(struct inode *inode);
2350 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2351 struct btrfs_pending_snapshot *pending);
2352 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2353 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2354 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2355 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2356 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2357 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2358 void btrfs_free_block_rsv(struct btrfs_root *root,
2359 struct btrfs_block_rsv *rsv);
2360 int btrfs_block_rsv_add(struct btrfs_root *root,
2361 struct btrfs_block_rsv *block_rsv,
2363 int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
2364 struct btrfs_block_rsv *block_rsv,
2366 int btrfs_block_rsv_check(struct btrfs_root *root,
2367 struct btrfs_block_rsv *block_rsv, int min_factor);
2368 int btrfs_block_rsv_refill(struct btrfs_root *root,
2369 struct btrfs_block_rsv *block_rsv,
2371 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2372 struct btrfs_block_rsv *dst_rsv,
2374 void btrfs_block_rsv_release(struct btrfs_root *root,
2375 struct btrfs_block_rsv *block_rsv,
2377 int btrfs_set_block_group_ro(struct btrfs_root *root,
2378 struct btrfs_block_group_cache *cache);
2379 int btrfs_set_block_group_rw(struct btrfs_root *root,
2380 struct btrfs_block_group_cache *cache);
2381 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2382 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2383 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2384 u64 start, u64 end);
2385 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2386 u64 num_bytes, u64 *actual_bytes);
2387 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2388 struct btrfs_root *root, u64 type);
2389 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2391 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2393 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2394 int level, int *slot);
2395 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2396 int btrfs_previous_item(struct btrfs_root *root,
2397 struct btrfs_path *path, u64 min_objectid,
2399 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2400 struct btrfs_root *root, struct btrfs_path *path,
2401 struct btrfs_key *new_key);
2402 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2403 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2404 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2405 struct btrfs_key *key, int lowest_level,
2406 int cache_only, u64 min_trans);
2407 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2408 struct btrfs_key *max_key,
2409 struct btrfs_path *path, int cache_only,
2411 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2412 struct btrfs_root *root, struct extent_buffer *buf,
2413 struct extent_buffer *parent, int parent_slot,
2414 struct extent_buffer **cow_ret);
2415 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2416 struct btrfs_root *root,
2417 struct extent_buffer *buf,
2418 struct extent_buffer **cow_ret, u64 new_root_objectid);
2419 int btrfs_block_can_be_shared(struct btrfs_root *root,
2420 struct extent_buffer *buf);
2421 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2422 *root, struct btrfs_path *path, u32 data_size);
2423 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2424 struct btrfs_root *root,
2425 struct btrfs_path *path,
2426 u32 new_size, int from_end);
2427 int btrfs_split_item(struct btrfs_trans_handle *trans,
2428 struct btrfs_root *root,
2429 struct btrfs_path *path,
2430 struct btrfs_key *new_key,
2431 unsigned long split_offset);
2432 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2433 struct btrfs_root *root,
2434 struct btrfs_path *path,
2435 struct btrfs_key *new_key);
2436 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2437 *root, struct btrfs_key *key, struct btrfs_path *p, int
2439 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2440 struct btrfs_root *root, struct extent_buffer *parent,
2441 int start_slot, int cache_only, u64 *last_ret,
2442 struct btrfs_key *progress);
2443 void btrfs_release_path(struct btrfs_path *p);
2444 struct btrfs_path *btrfs_alloc_path(void);
2445 void btrfs_free_path(struct btrfs_path *p);
2446 void btrfs_set_path_blocking(struct btrfs_path *p);
2447 void btrfs_clear_path_blocking(struct btrfs_path *p,
2448 struct extent_buffer *held, int held_rw);
2449 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2451 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2452 struct btrfs_path *path, int slot, int nr);
2453 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2454 struct btrfs_root *root,
2455 struct btrfs_path *path)
2457 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2460 int setup_items_for_insert(struct btrfs_trans_handle *trans,
2461 struct btrfs_root *root, struct btrfs_path *path,
2462 struct btrfs_key *cpu_key, u32 *data_size,
2463 u32 total_data, u32 total_size, int nr);
2464 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2465 *root, struct btrfs_key *key, void *data, u32 data_size);
2466 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2467 struct btrfs_root *root,
2468 struct btrfs_path *path,
2469 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2471 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2472 struct btrfs_root *root,
2473 struct btrfs_path *path,
2474 struct btrfs_key *key,
2477 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2480 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2481 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2482 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2483 void btrfs_drop_snapshot(struct btrfs_root *root,
2484 struct btrfs_block_rsv *block_rsv, int update_ref);
2485 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2486 struct btrfs_root *root,
2487 struct extent_buffer *node,
2488 struct extent_buffer *parent);
2489 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2492 * Get synced with close_ctree()
2495 return fs_info->closing;
2497 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2499 kfree(fs_info->delayed_root);
2500 kfree(fs_info->extent_root);
2501 kfree(fs_info->tree_root);
2502 kfree(fs_info->chunk_root);
2503 kfree(fs_info->dev_root);
2504 kfree(fs_info->csum_root);
2505 kfree(fs_info->super_copy);
2506 kfree(fs_info->super_for_commit);
2511 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2512 struct btrfs_path *path,
2513 u64 root_id, u64 ref_id);
2514 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2515 struct btrfs_root *tree_root,
2516 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2517 const char *name, int name_len);
2518 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2519 struct btrfs_root *tree_root,
2520 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2521 const char *name, int name_len);
2522 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2523 struct btrfs_key *key);
2524 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2525 *root, struct btrfs_key *key, struct btrfs_root_item
2527 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2528 *root, struct btrfs_key *key, struct btrfs_root_item
2530 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2531 btrfs_root_item *item, struct btrfs_key *key);
2532 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2533 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2534 void btrfs_set_root_node(struct btrfs_root_item *item,
2535 struct extent_buffer *node);
2536 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2539 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2540 struct btrfs_root *root, const char *name,
2541 int name_len, struct inode *dir,
2542 struct btrfs_key *location, u8 type, u64 index);
2543 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2544 struct btrfs_root *root,
2545 struct btrfs_path *path, u64 dir,
2546 const char *name, int name_len,
2548 struct btrfs_dir_item *
2549 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2550 struct btrfs_root *root,
2551 struct btrfs_path *path, u64 dir,
2552 u64 objectid, const char *name, int name_len,
2554 struct btrfs_dir_item *
2555 btrfs_search_dir_index_item(struct btrfs_root *root,
2556 struct btrfs_path *path, u64 dirid,
2557 const char *name, int name_len);
2558 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2559 struct btrfs_path *path,
2560 const char *name, int name_len);
2561 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2562 struct btrfs_root *root,
2563 struct btrfs_path *path,
2564 struct btrfs_dir_item *di);
2565 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2566 struct btrfs_root *root,
2567 struct btrfs_path *path, u64 objectid,
2568 const char *name, u16 name_len,
2569 const void *data, u16 data_len);
2570 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2571 struct btrfs_root *root,
2572 struct btrfs_path *path, u64 dir,
2573 const char *name, u16 name_len,
2575 int verify_dir_item(struct btrfs_root *root,
2576 struct extent_buffer *leaf,
2577 struct btrfs_dir_item *dir_item);
2580 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2581 struct btrfs_root *root, u64 offset);
2582 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2583 struct btrfs_root *root, u64 offset);
2584 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2587 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2588 struct btrfs_root *root,
2589 const char *name, int name_len,
2590 u64 inode_objectid, u64 ref_objectid, u64 index);
2591 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2592 struct btrfs_root *root,
2593 const char *name, int name_len,
2594 u64 inode_objectid, u64 ref_objectid, u64 *index);
2595 struct btrfs_inode_ref *
2596 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2597 struct btrfs_root *root,
2598 struct btrfs_path *path,
2599 const char *name, int name_len,
2600 u64 inode_objectid, u64 ref_objectid, int mod);
2601 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2602 struct btrfs_root *root,
2603 struct btrfs_path *path, u64 objectid);
2604 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2605 *root, struct btrfs_path *path,
2606 struct btrfs_key *location, int mod);
2609 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2610 struct btrfs_root *root, u64 bytenr, u64 len);
2611 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2612 struct bio *bio, u32 *dst);
2613 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2614 struct bio *bio, u64 logical_offset, u32 *dst);
2615 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2616 struct btrfs_root *root,
2617 u64 objectid, u64 pos,
2618 u64 disk_offset, u64 disk_num_bytes,
2619 u64 num_bytes, u64 offset, u64 ram_bytes,
2620 u8 compression, u8 encryption, u16 other_encoding);
2621 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2622 struct btrfs_root *root,
2623 struct btrfs_path *path, u64 objectid,
2624 u64 bytenr, int mod);
2625 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2626 struct btrfs_root *root,
2627 struct btrfs_ordered_sum *sums);
2628 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2629 struct bio *bio, u64 file_start, int contig);
2630 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2631 struct btrfs_root *root,
2632 struct btrfs_path *path,
2633 u64 bytenr, int cow);
2634 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2635 struct btrfs_root *root, struct btrfs_path *path,
2637 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2638 struct list_head *list, int search_commit);
2640 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
2641 size_t pg_offset, u64 start, u64 len,
2644 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2645 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2646 #define ClearPageChecked ClearPageFsMisc
2647 #define SetPageChecked SetPageFsMisc
2648 #define PageChecked PageFsMisc
2651 /* This forces readahead on a given range of bytes in an inode */
2652 static inline void btrfs_force_ra(struct address_space *mapping,
2653 struct file_ra_state *ra, struct file *file,
2654 pgoff_t offset, unsigned long req_size)
2656 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
2659 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2660 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2661 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2662 struct btrfs_root *root,
2663 struct inode *dir, struct inode *inode,
2664 const char *name, int name_len);
2665 int btrfs_add_link(struct btrfs_trans_handle *trans,
2666 struct inode *parent_inode, struct inode *inode,
2667 const char *name, int name_len, int add_backref, u64 index);
2668 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2669 struct btrfs_root *root,
2670 struct inode *dir, u64 objectid,
2671 const char *name, int name_len);
2672 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2673 struct btrfs_root *root,
2674 struct inode *inode, u64 new_size,
2677 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2678 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2679 struct extent_state **cached_state);
2680 int btrfs_writepages(struct address_space *mapping,
2681 struct writeback_control *wbc);
2682 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2683 struct btrfs_root *new_root, u64 new_dirid);
2684 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2685 size_t size, struct bio *bio, unsigned long bio_flags);
2687 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2688 int btrfs_readpage(struct file *file, struct page *page);
2689 void btrfs_evict_inode(struct inode *inode);
2690 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2691 void btrfs_dirty_inode(struct inode *inode, int flags);
2692 struct inode *btrfs_alloc_inode(struct super_block *sb);
2693 void btrfs_destroy_inode(struct inode *inode);
2694 int btrfs_drop_inode(struct inode *inode);
2695 int btrfs_init_cachep(void);
2696 void btrfs_destroy_cachep(void);
2697 long btrfs_ioctl_trans_end(struct file *file);
2698 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2699 struct btrfs_root *root, int *was_new);
2700 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2701 size_t pg_offset, u64 start, u64 end,
2703 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2704 struct btrfs_root *root,
2705 struct inode *inode);
2706 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2707 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2708 int btrfs_orphan_cleanup(struct btrfs_root *root);
2709 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2710 struct btrfs_root *root);
2711 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2712 int btrfs_invalidate_inodes(struct btrfs_root *root);
2713 void btrfs_add_delayed_iput(struct inode *inode);
2714 void btrfs_run_delayed_iputs(struct btrfs_root *root);
2715 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2716 u64 start, u64 num_bytes, u64 min_size,
2717 loff_t actual_len, u64 *alloc_hint);
2718 int btrfs_prealloc_file_range_trans(struct inode *inode,
2719 struct btrfs_trans_handle *trans, int mode,
2720 u64 start, u64 num_bytes, u64 min_size,
2721 loff_t actual_len, u64 *alloc_hint);
2722 extern const struct dentry_operations btrfs_dentry_operations;
2725 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2726 void btrfs_update_iflags(struct inode *inode);
2727 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
2728 int btrfs_defrag_file(struct inode *inode, struct file *file,
2729 struct btrfs_ioctl_defrag_range_args *range,
2730 u64 newer_than, unsigned long max_pages);
2732 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2733 struct inode *inode);
2734 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2735 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2736 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2738 extern const struct file_operations btrfs_file_operations;
2739 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2740 u64 start, u64 end, u64 *hint_byte, int drop_cache);
2741 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2742 struct inode *inode, u64 start, u64 end);
2743 int btrfs_release_file(struct inode *inode, struct file *file);
2744 void btrfs_drop_pages(struct page **pages, size_t num_pages);
2745 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
2746 struct page **pages, size_t num_pages,
2747 loff_t pos, size_t write_bytes,
2748 struct extent_state **cached);
2751 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2752 struct btrfs_root *root, int cache_only);
2755 int btrfs_init_sysfs(void);
2756 void btrfs_exit_sysfs(void);
2759 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2762 int btrfs_parse_options(struct btrfs_root *root, char *options);
2763 int btrfs_sync_fs(struct super_block *sb, int wait);
2764 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
2765 unsigned int line, int errno);
2767 #define btrfs_std_error(fs_info, errno) \
2770 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2774 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2775 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
2776 int btrfs_init_acl(struct btrfs_trans_handle *trans,
2777 struct inode *inode, struct inode *dir);
2778 int btrfs_acl_chmod(struct inode *inode);
2780 #define btrfs_get_acl NULL
2781 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
2782 struct inode *inode, struct inode *dir)
2786 static inline int btrfs_acl_chmod(struct inode *inode)
2793 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2794 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2795 struct btrfs_root *root);
2796 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2797 struct btrfs_root *root);
2798 int btrfs_recover_relocation(struct btrfs_root *root);
2799 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
2800 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
2801 struct btrfs_root *root, struct extent_buffer *buf,
2802 struct extent_buffer *cow);
2803 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
2804 struct btrfs_pending_snapshot *pending,
2805 u64 *bytes_to_reserve);
2806 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
2807 struct btrfs_pending_snapshot *pending);
2810 int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
2811 struct btrfs_scrub_progress *progress, int readonly);
2812 int btrfs_scrub_pause(struct btrfs_root *root);
2813 int btrfs_scrub_pause_super(struct btrfs_root *root);
2814 int btrfs_scrub_continue(struct btrfs_root *root);
2815 int btrfs_scrub_continue_super(struct btrfs_root *root);
2816 int btrfs_scrub_cancel(struct btrfs_root *root);
2817 int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
2818 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
2819 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
2820 struct btrfs_scrub_progress *progress);
2823 struct reada_control {
2824 struct btrfs_root *root; /* tree to prefetch */
2825 struct btrfs_key key_start;
2826 struct btrfs_key key_end; /* exclusive */
2829 wait_queue_head_t wait;
2831 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
2832 struct btrfs_key *start, struct btrfs_key *end);
2833 int btrfs_reada_wait(void *handle);
2834 void btrfs_reada_detach(void *handle);
2835 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
2836 u64 start, int err);