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 (1ULL << 0)
755 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
756 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
757 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
758 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
759 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
760 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
761 #define BTRFS_NR_RAID_TYPES 5
763 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
764 BTRFS_BLOCK_GROUP_SYSTEM | \
765 BTRFS_BLOCK_GROUP_METADATA)
767 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
768 BTRFS_BLOCK_GROUP_RAID1 | \
769 BTRFS_BLOCK_GROUP_DUP | \
770 BTRFS_BLOCK_GROUP_RAID10)
771 struct btrfs_block_group_item {
773 __le64 chunk_objectid;
775 } __attribute__ ((__packed__));
777 struct btrfs_space_info {
780 u64 total_bytes; /* total bytes in the space,
781 this doesn't take mirrors into account */
782 u64 bytes_used; /* total bytes used,
783 this doesn't take mirrors into account */
784 u64 bytes_pinned; /* total bytes pinned, will be freed when the
785 transaction finishes */
786 u64 bytes_reserved; /* total bytes the allocator has reserved for
787 current allocations */
788 u64 bytes_readonly; /* total bytes that are read only */
790 u64 bytes_may_use; /* number of bytes that may be used for
791 delalloc/allocations */
792 u64 disk_used; /* total bytes used on disk */
793 u64 disk_total; /* total bytes on disk, takes mirrors into
797 * we bump reservation progress every time we decrement
798 * bytes_reserved. This way people waiting for reservations
799 * know something good has happened and they can check
800 * for progress. The number here isn't to be trusted, it
801 * just shows reclaim activity
803 unsigned long reservation_progress;
805 unsigned int full:1; /* indicates that we cannot allocate any more
806 chunks for this space */
807 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
809 unsigned int flush:1; /* set if we are trying to make space */
811 unsigned int force_alloc; /* set if we need to force a chunk
812 alloc for this space */
814 struct list_head list;
816 /* for block groups in our same type */
817 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
819 struct rw_semaphore groups_sem;
820 wait_queue_head_t wait;
823 struct btrfs_block_rsv {
826 struct btrfs_space_info *space_info;
832 * free clusters are used to claim free space in relatively large chunks,
833 * allowing us to do less seeky writes. They are used for all metadata
834 * allocations and data allocations in ssd mode.
836 struct btrfs_free_cluster {
838 spinlock_t refill_lock;
841 /* largest extent in this cluster */
844 /* first extent starting offset */
847 struct btrfs_block_group_cache *block_group;
849 * when a cluster is allocated from a block group, we put the
850 * cluster onto a list in the block group so that it can
851 * be freed before the block group is freed.
853 struct list_head block_group_list;
856 enum btrfs_caching_type {
858 BTRFS_CACHE_STARTED = 1,
859 BTRFS_CACHE_FAST = 2,
860 BTRFS_CACHE_FINISHED = 3,
863 enum btrfs_disk_cache_state {
864 BTRFS_DC_WRITTEN = 0,
868 BTRFS_DC_NEED_WRITE = 4,
871 struct btrfs_caching_control {
872 struct list_head list;
874 wait_queue_head_t wait;
875 struct btrfs_work work;
876 struct btrfs_block_group_cache *block_group;
881 struct btrfs_block_group_cache {
882 struct btrfs_key key;
883 struct btrfs_block_group_item item;
884 struct btrfs_fs_info *fs_info;
892 u64 cache_generation;
894 unsigned int dirty:1;
897 int disk_cache_state;
899 /* cache tracking stuff */
901 struct btrfs_caching_control *caching_ctl;
902 u64 last_byte_to_unpin;
904 struct btrfs_space_info *space_info;
906 /* free space cache stuff */
907 struct btrfs_free_space_ctl *free_space_ctl;
909 /* block group cache stuff */
910 struct rb_node cache_node;
912 /* for block groups in the same raid type */
913 struct list_head list;
918 /* List of struct btrfs_free_clusters for this block group.
919 * Today it will only have one thing on it, but that may change
921 struct list_head cluster_list;
924 struct reloc_control;
926 struct btrfs_fs_devices;
927 struct btrfs_delayed_root;
928 struct btrfs_fs_info {
929 u8 fsid[BTRFS_FSID_SIZE];
930 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
931 struct btrfs_root *extent_root;
932 struct btrfs_root *tree_root;
933 struct btrfs_root *chunk_root;
934 struct btrfs_root *dev_root;
935 struct btrfs_root *fs_root;
936 struct btrfs_root *csum_root;
938 /* the log root tree is a directory of all the other log roots */
939 struct btrfs_root *log_root_tree;
941 spinlock_t fs_roots_radix_lock;
942 struct radix_tree_root fs_roots_radix;
944 /* block group cache stuff */
945 spinlock_t block_group_cache_lock;
946 struct rb_root block_group_cache_tree;
948 /* keep track of unallocated space */
949 spinlock_t free_chunk_lock;
950 u64 free_chunk_space;
952 struct extent_io_tree freed_extents[2];
953 struct extent_io_tree *pinned_extents;
955 /* logical->physical extent mapping */
956 struct btrfs_mapping_tree mapping_tree;
959 * block reservation for extent, checksum, root tree and
960 * delayed dir index item
962 struct btrfs_block_rsv global_block_rsv;
963 /* block reservation for delay allocation */
964 struct btrfs_block_rsv delalloc_block_rsv;
965 /* block reservation for metadata operations */
966 struct btrfs_block_rsv trans_block_rsv;
967 /* block reservation for chunk tree */
968 struct btrfs_block_rsv chunk_block_rsv;
969 /* block reservation for delayed operations */
970 struct btrfs_block_rsv delayed_block_rsv;
972 struct btrfs_block_rsv empty_block_rsv;
975 u64 last_trans_committed;
978 * this is updated to the current trans every time a full commit
979 * is required instead of the faster short fsync log commits
981 u64 last_trans_log_full_commit;
982 unsigned long mount_opt:20;
983 unsigned long compress_type:4;
986 struct btrfs_transaction *running_transaction;
987 wait_queue_head_t transaction_throttle;
988 wait_queue_head_t transaction_wait;
989 wait_queue_head_t transaction_blocked_wait;
990 wait_queue_head_t async_submit_wait;
992 struct btrfs_super_block *super_copy;
993 struct btrfs_super_block *super_for_commit;
994 struct block_device *__bdev;
995 struct super_block *sb;
996 struct inode *btree_inode;
997 struct backing_dev_info bdi;
998 struct mutex tree_log_mutex;
999 struct mutex transaction_kthread_mutex;
1000 struct mutex cleaner_mutex;
1001 struct mutex chunk_mutex;
1002 struct mutex volume_mutex;
1004 * this protects the ordered operations list only while we are
1005 * processing all of the entries on it. This way we make
1006 * sure the commit code doesn't find the list temporarily empty
1007 * because another function happens to be doing non-waiting preflush
1008 * before jumping into the main commit.
1010 struct mutex ordered_operations_mutex;
1011 struct rw_semaphore extent_commit_sem;
1013 struct rw_semaphore cleanup_work_sem;
1015 struct rw_semaphore subvol_sem;
1016 struct srcu_struct subvol_srcu;
1018 spinlock_t trans_lock;
1020 * the reloc mutex goes with the trans lock, it is taken
1021 * during commit to protect us from the relocation code
1023 struct mutex reloc_mutex;
1025 struct list_head trans_list;
1026 struct list_head hashers;
1027 struct list_head dead_roots;
1028 struct list_head caching_block_groups;
1030 spinlock_t delayed_iput_lock;
1031 struct list_head delayed_iputs;
1033 atomic_t nr_async_submits;
1034 atomic_t async_submit_draining;
1035 atomic_t nr_async_bios;
1036 atomic_t async_delalloc_pages;
1037 atomic_t open_ioctl_trans;
1040 * this is used by the balancing code to wait for all the pending
1043 spinlock_t ordered_extent_lock;
1046 * all of the data=ordered extents pending writeback
1047 * these can span multiple transactions and basically include
1048 * every dirty data page that isn't from nodatacow
1050 struct list_head ordered_extents;
1053 * all of the inodes that have delalloc bytes. It is possible for
1054 * this list to be empty even when there is still dirty data=ordered
1055 * extents waiting to finish IO.
1057 struct list_head delalloc_inodes;
1060 * special rename and truncate targets that must be on disk before
1061 * we're allowed to commit. This is basically the ext3 style
1062 * data=ordered list.
1064 struct list_head ordered_operations;
1067 * there is a pool of worker threads for checksumming during writes
1068 * and a pool for checksumming after reads. This is because readers
1069 * can run with FS locks held, and the writers may be waiting for
1070 * those locks. We don't want ordering in the pending list to cause
1071 * deadlocks, and so the two are serviced separately.
1073 * A third pool does submit_bio to avoid deadlocking with the other
1076 struct btrfs_workers generic_worker;
1077 struct btrfs_workers workers;
1078 struct btrfs_workers delalloc_workers;
1079 struct btrfs_workers endio_workers;
1080 struct btrfs_workers endio_meta_workers;
1081 struct btrfs_workers endio_meta_write_workers;
1082 struct btrfs_workers endio_write_workers;
1083 struct btrfs_workers endio_freespace_worker;
1084 struct btrfs_workers submit_workers;
1085 struct btrfs_workers caching_workers;
1086 struct btrfs_workers readahead_workers;
1089 * fixup workers take dirty pages that didn't properly go through
1090 * the cow mechanism and make them safe to write. It happens
1091 * for the sys_munmap function call path
1093 struct btrfs_workers fixup_workers;
1094 struct btrfs_workers delayed_workers;
1095 struct task_struct *transaction_kthread;
1096 struct task_struct *cleaner_kthread;
1097 int thread_pool_size;
1099 struct kobject super_kobj;
1100 struct completion kobj_unregister;
1103 int log_root_recovering;
1109 /* protected by the delalloc lock, used to keep from writing
1110 * metadata until there is a nice batch
1112 u64 dirty_metadata_bytes;
1113 struct list_head dirty_cowonly_roots;
1115 struct btrfs_fs_devices *fs_devices;
1118 * the space_info list is almost entirely read only. It only changes
1119 * when we add a new raid type to the FS, and that happens
1120 * very rarely. RCU is used to protect it.
1122 struct list_head space_info;
1124 struct reloc_control *reloc_ctl;
1126 spinlock_t delalloc_lock;
1129 /* data_alloc_cluster is only used in ssd mode */
1130 struct btrfs_free_cluster data_alloc_cluster;
1132 /* all metadata allocations go through this cluster */
1133 struct btrfs_free_cluster meta_alloc_cluster;
1135 /* auto defrag inodes go here */
1136 spinlock_t defrag_inodes_lock;
1137 struct rb_root defrag_inodes;
1138 atomic_t defrag_running;
1140 spinlock_t ref_cache_lock;
1141 u64 total_ref_cache_size;
1143 u64 avail_data_alloc_bits;
1144 u64 avail_metadata_alloc_bits;
1145 u64 avail_system_alloc_bits;
1147 unsigned data_chunk_allocations;
1148 unsigned metadata_ratio;
1152 /* private scrub information */
1153 struct mutex scrub_lock;
1154 atomic_t scrubs_running;
1155 atomic_t scrub_pause_req;
1156 atomic_t scrubs_paused;
1157 atomic_t scrub_cancel_req;
1158 wait_queue_head_t scrub_pause_wait;
1159 struct rw_semaphore scrub_super_lock;
1160 int scrub_workers_refcnt;
1161 struct btrfs_workers scrub_workers;
1163 /* filesystem state */
1166 struct btrfs_delayed_root *delayed_root;
1168 /* readahead tree */
1169 spinlock_t reada_lock;
1170 struct radix_tree_root reada_tree;
1172 /* next backup root to be overwritten */
1173 int backup_root_index;
1177 * in ram representation of the tree. extent_root is used for all allocations
1178 * and for the extent tree extent_root root.
1181 struct extent_buffer *node;
1183 struct extent_buffer *commit_root;
1184 struct btrfs_root *log_root;
1185 struct btrfs_root *reloc_root;
1187 struct btrfs_root_item root_item;
1188 struct btrfs_key root_key;
1189 struct btrfs_fs_info *fs_info;
1190 struct extent_io_tree dirty_log_pages;
1192 struct kobject root_kobj;
1193 struct completion kobj_unregister;
1194 struct mutex objectid_mutex;
1196 spinlock_t accounting_lock;
1197 struct btrfs_block_rsv *block_rsv;
1199 /* free ino cache stuff */
1200 struct mutex fs_commit_mutex;
1201 struct btrfs_free_space_ctl *free_ino_ctl;
1202 enum btrfs_caching_type cached;
1203 spinlock_t cache_lock;
1204 wait_queue_head_t cache_wait;
1205 struct btrfs_free_space_ctl *free_ino_pinned;
1207 struct inode *cache_inode;
1209 struct mutex log_mutex;
1210 wait_queue_head_t log_writer_wait;
1211 wait_queue_head_t log_commit_wait[2];
1212 atomic_t log_writers;
1213 atomic_t log_commit[2];
1214 unsigned long log_transid;
1215 unsigned long last_log_commit;
1216 unsigned long log_batch;
1217 pid_t log_start_pid;
1218 bool log_multiple_pids;
1223 /* data allocations are done in sectorsize units */
1226 /* node allocations are done in nodesize units */
1229 /* leaf allocations are done in leafsize units */
1236 u64 highest_objectid;
1238 /* btrfs_record_root_in_trans is a multi-step process,
1239 * and it can race with the balancing code. But the
1240 * race is very small, and only the first time the root
1241 * is added to each transaction. So in_trans_setup
1242 * is used to tell us when more checks are required
1244 unsigned long in_trans_setup;
1249 u64 defrag_trans_start;
1250 struct btrfs_key defrag_progress;
1251 struct btrfs_key defrag_max;
1255 /* the dirty list is only used by non-reference counted roots */
1256 struct list_head dirty_list;
1258 struct list_head root_list;
1260 spinlock_t orphan_lock;
1261 struct list_head orphan_list;
1262 struct btrfs_block_rsv *orphan_block_rsv;
1263 int orphan_item_inserted;
1264 int orphan_cleanup_state;
1266 spinlock_t inode_lock;
1267 /* red-black tree that keeps track of in-memory inodes */
1268 struct rb_root inode_tree;
1271 * radix tree that keeps track of delayed nodes of every inode,
1272 * protected by inode_lock
1274 struct radix_tree_root delayed_nodes_tree;
1276 * right now this just gets used so that a root has its own devid
1277 * for stat. It may be used for more later
1284 struct btrfs_ioctl_defrag_range_args {
1285 /* start of the defrag operation */
1288 /* number of bytes to defrag, use (u64)-1 to say all */
1292 * flags for the operation, which can include turning
1293 * on compression for this one defrag
1298 * any extent bigger than this will be considered
1299 * already defragged. Use 0 to take the kernel default
1300 * Use 1 to say every single extent must be rewritten
1302 __u32 extent_thresh;
1305 * which compression method to use if turning on compression
1306 * for this defrag operation. If unspecified, zlib will
1309 __u32 compress_type;
1311 /* spare for later */
1317 * inode items have the data typically returned from stat and store other
1318 * info about object characteristics. There is one for every file and dir in
1321 #define BTRFS_INODE_ITEM_KEY 1
1322 #define BTRFS_INODE_REF_KEY 12
1323 #define BTRFS_XATTR_ITEM_KEY 24
1324 #define BTRFS_ORPHAN_ITEM_KEY 48
1325 /* reserve 2-15 close to the inode for later flexibility */
1328 * dir items are the name -> inode pointers in a directory. There is one
1329 * for every name in a directory.
1331 #define BTRFS_DIR_LOG_ITEM_KEY 60
1332 #define BTRFS_DIR_LOG_INDEX_KEY 72
1333 #define BTRFS_DIR_ITEM_KEY 84
1334 #define BTRFS_DIR_INDEX_KEY 96
1336 * extent data is for file data
1338 #define BTRFS_EXTENT_DATA_KEY 108
1341 * extent csums are stored in a separate tree and hold csums for
1342 * an entire extent on disk.
1344 #define BTRFS_EXTENT_CSUM_KEY 128
1347 * root items point to tree roots. They are typically in the root
1348 * tree used by the super block to find all the other trees
1350 #define BTRFS_ROOT_ITEM_KEY 132
1353 * root backrefs tie subvols and snapshots to the directory entries that
1356 #define BTRFS_ROOT_BACKREF_KEY 144
1359 * root refs make a fast index for listing all of the snapshots and
1360 * subvolumes referenced by a given root. They point directly to the
1361 * directory item in the root that references the subvol
1363 #define BTRFS_ROOT_REF_KEY 156
1366 * extent items are in the extent map tree. These record which blocks
1367 * are used, and how many references there are to each block
1369 #define BTRFS_EXTENT_ITEM_KEY 168
1371 #define BTRFS_TREE_BLOCK_REF_KEY 176
1373 #define BTRFS_EXTENT_DATA_REF_KEY 178
1375 #define BTRFS_EXTENT_REF_V0_KEY 180
1377 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1379 #define BTRFS_SHARED_DATA_REF_KEY 184
1382 * block groups give us hints into the extent allocation trees. Which
1383 * blocks are free etc etc
1385 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1387 #define BTRFS_DEV_EXTENT_KEY 204
1388 #define BTRFS_DEV_ITEM_KEY 216
1389 #define BTRFS_CHUNK_ITEM_KEY 228
1392 * string items are for debugging. They just store a short string of
1395 #define BTRFS_STRING_ITEM_KEY 253
1398 * Flags for mount options.
1400 * Note: don't forget to add new options to btrfs_show_options()
1402 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1403 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1404 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1405 #define BTRFS_MOUNT_SSD (1 << 3)
1406 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1407 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1408 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1409 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1410 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1411 #define BTRFS_MOUNT_NOSSD (1 << 9)
1412 #define BTRFS_MOUNT_DISCARD (1 << 10)
1413 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1414 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1415 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1416 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1417 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1418 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1419 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1420 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1422 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1423 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1424 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1429 #define BTRFS_INODE_NODATASUM (1 << 0)
1430 #define BTRFS_INODE_NODATACOW (1 << 1)
1431 #define BTRFS_INODE_READONLY (1 << 2)
1432 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1433 #define BTRFS_INODE_PREALLOC (1 << 4)
1434 #define BTRFS_INODE_SYNC (1 << 5)
1435 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1436 #define BTRFS_INODE_APPEND (1 << 7)
1437 #define BTRFS_INODE_NODUMP (1 << 8)
1438 #define BTRFS_INODE_NOATIME (1 << 9)
1439 #define BTRFS_INODE_DIRSYNC (1 << 10)
1440 #define BTRFS_INODE_COMPRESS (1 << 11)
1442 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1444 /* some macros to generate set/get funcs for the struct fields. This
1445 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1448 #define le8_to_cpu(v) (v)
1449 #define cpu_to_le8(v) (v)
1452 #define read_eb_member(eb, ptr, type, member, result) ( \
1453 read_extent_buffer(eb, (char *)(result), \
1454 ((unsigned long)(ptr)) + \
1455 offsetof(type, member), \
1456 sizeof(((type *)0)->member)))
1458 #define write_eb_member(eb, ptr, type, member, result) ( \
1459 write_extent_buffer(eb, (char *)(result), \
1460 ((unsigned long)(ptr)) + \
1461 offsetof(type, member), \
1462 sizeof(((type *)0)->member)))
1464 #ifndef BTRFS_SETGET_FUNCS
1465 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1466 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1467 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1470 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1471 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1473 type *p = page_address(eb->first_page); \
1474 u##bits res = le##bits##_to_cpu(p->member); \
1477 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1480 type *p = page_address(eb->first_page); \
1481 p->member = cpu_to_le##bits(val); \
1484 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1485 static inline u##bits btrfs_##name(type *s) \
1487 return le##bits##_to_cpu(s->member); \
1489 static inline void btrfs_set_##name(type *s, u##bits val) \
1491 s->member = cpu_to_le##bits(val); \
1494 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1495 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1496 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1497 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1498 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1499 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1501 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1502 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1503 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1504 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1505 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1506 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1508 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1509 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1511 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1513 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1515 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1517 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1519 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1520 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1522 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1524 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1526 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1529 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1531 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1534 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1536 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1539 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1540 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1541 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1542 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1543 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1544 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1545 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1546 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1547 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1548 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1549 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1551 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1553 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1556 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1557 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1558 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1560 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1562 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1564 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1566 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1567 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1569 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1571 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1572 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1574 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1577 unsigned long offset = (unsigned long)c;
1578 offset += offsetof(struct btrfs_chunk, stripe);
1579 offset += nr * sizeof(struct btrfs_stripe);
1580 return (struct btrfs_stripe *)offset;
1583 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1585 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1588 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1589 struct btrfs_chunk *c, int nr)
1591 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1594 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1595 struct btrfs_chunk *c, int nr)
1597 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1600 /* struct btrfs_block_group_item */
1601 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1603 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1605 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1606 struct btrfs_block_group_item, chunk_objectid, 64);
1608 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1609 struct btrfs_block_group_item, chunk_objectid, 64);
1610 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1611 struct btrfs_block_group_item, flags, 64);
1612 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1613 struct btrfs_block_group_item, flags, 64);
1615 /* struct btrfs_inode_ref */
1616 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1617 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1619 /* struct btrfs_inode_item */
1620 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1621 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1622 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1623 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1624 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1625 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1626 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1627 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1628 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1629 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1630 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1631 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1633 static inline struct btrfs_timespec *
1634 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1636 unsigned long ptr = (unsigned long)inode_item;
1637 ptr += offsetof(struct btrfs_inode_item, atime);
1638 return (struct btrfs_timespec *)ptr;
1641 static inline struct btrfs_timespec *
1642 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1644 unsigned long ptr = (unsigned long)inode_item;
1645 ptr += offsetof(struct btrfs_inode_item, mtime);
1646 return (struct btrfs_timespec *)ptr;
1649 static inline struct btrfs_timespec *
1650 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1652 unsigned long ptr = (unsigned long)inode_item;
1653 ptr += offsetof(struct btrfs_inode_item, ctime);
1654 return (struct btrfs_timespec *)ptr;
1657 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1658 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1660 /* struct btrfs_dev_extent */
1661 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1663 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1664 chunk_objectid, 64);
1665 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1667 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1669 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1671 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1672 return (u8 *)((unsigned long)dev + ptr);
1675 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1676 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1678 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1680 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1683 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1685 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1686 struct btrfs_tree_block_info *item,
1687 struct btrfs_disk_key *key)
1689 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1692 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1693 struct btrfs_tree_block_info *item,
1694 struct btrfs_disk_key *key)
1696 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1699 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1701 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1703 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1705 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1708 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1711 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1713 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1716 static inline u32 btrfs_extent_inline_ref_size(int type)
1718 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1719 type == BTRFS_SHARED_BLOCK_REF_KEY)
1720 return sizeof(struct btrfs_extent_inline_ref);
1721 if (type == BTRFS_SHARED_DATA_REF_KEY)
1722 return sizeof(struct btrfs_shared_data_ref) +
1723 sizeof(struct btrfs_extent_inline_ref);
1724 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1725 return sizeof(struct btrfs_extent_data_ref) +
1726 offsetof(struct btrfs_extent_inline_ref, offset);
1731 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1732 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1734 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1735 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1737 /* struct btrfs_node */
1738 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1739 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1741 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1744 ptr = offsetof(struct btrfs_node, ptrs) +
1745 sizeof(struct btrfs_key_ptr) * nr;
1746 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1749 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1753 ptr = offsetof(struct btrfs_node, ptrs) +
1754 sizeof(struct btrfs_key_ptr) * nr;
1755 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1758 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1761 ptr = offsetof(struct btrfs_node, ptrs) +
1762 sizeof(struct btrfs_key_ptr) * nr;
1763 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1766 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1770 ptr = offsetof(struct btrfs_node, ptrs) +
1771 sizeof(struct btrfs_key_ptr) * nr;
1772 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1775 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1777 return offsetof(struct btrfs_node, ptrs) +
1778 sizeof(struct btrfs_key_ptr) * nr;
1781 void btrfs_node_key(struct extent_buffer *eb,
1782 struct btrfs_disk_key *disk_key, int nr);
1784 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1785 struct btrfs_disk_key *disk_key, int nr)
1788 ptr = btrfs_node_key_ptr_offset(nr);
1789 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1790 struct btrfs_key_ptr, key, disk_key);
1793 /* struct btrfs_item */
1794 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1795 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1797 static inline unsigned long btrfs_item_nr_offset(int nr)
1799 return offsetof(struct btrfs_leaf, items) +
1800 sizeof(struct btrfs_item) * nr;
1803 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1806 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1809 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1810 struct btrfs_item *item)
1812 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1815 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1817 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1820 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1822 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1825 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1827 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1830 static inline void btrfs_item_key(struct extent_buffer *eb,
1831 struct btrfs_disk_key *disk_key, int nr)
1833 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1834 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1837 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1838 struct btrfs_disk_key *disk_key, int nr)
1840 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1841 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1844 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1847 * struct btrfs_root_ref
1849 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1850 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1851 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1853 /* struct btrfs_dir_item */
1854 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1855 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1856 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1857 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1859 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1860 struct btrfs_dir_item *item,
1861 struct btrfs_disk_key *key)
1863 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1866 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1867 struct btrfs_dir_item *item,
1868 struct btrfs_disk_key *key)
1870 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1873 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1875 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1877 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1880 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1881 struct btrfs_free_space_header *h,
1882 struct btrfs_disk_key *key)
1884 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1887 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1888 struct btrfs_free_space_header *h,
1889 struct btrfs_disk_key *key)
1891 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1894 /* struct btrfs_disk_key */
1895 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1897 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1898 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1900 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1901 struct btrfs_disk_key *disk)
1903 cpu->offset = le64_to_cpu(disk->offset);
1904 cpu->type = disk->type;
1905 cpu->objectid = le64_to_cpu(disk->objectid);
1908 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1909 struct btrfs_key *cpu)
1911 disk->offset = cpu_to_le64(cpu->offset);
1912 disk->type = cpu->type;
1913 disk->objectid = cpu_to_le64(cpu->objectid);
1916 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1917 struct btrfs_key *key, int nr)
1919 struct btrfs_disk_key disk_key;
1920 btrfs_node_key(eb, &disk_key, nr);
1921 btrfs_disk_key_to_cpu(key, &disk_key);
1924 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1925 struct btrfs_key *key, int nr)
1927 struct btrfs_disk_key disk_key;
1928 btrfs_item_key(eb, &disk_key, nr);
1929 btrfs_disk_key_to_cpu(key, &disk_key);
1932 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1933 struct btrfs_dir_item *item,
1934 struct btrfs_key *key)
1936 struct btrfs_disk_key disk_key;
1937 btrfs_dir_item_key(eb, item, &disk_key);
1938 btrfs_disk_key_to_cpu(key, &disk_key);
1942 static inline u8 btrfs_key_type(struct btrfs_key *key)
1947 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1952 /* struct btrfs_header */
1953 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1954 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1956 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1957 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1958 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1959 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1961 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1963 return (btrfs_header_flags(eb) & flag) == flag;
1966 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1968 u64 flags = btrfs_header_flags(eb);
1969 btrfs_set_header_flags(eb, flags | flag);
1970 return (flags & flag) == flag;
1973 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1975 u64 flags = btrfs_header_flags(eb);
1976 btrfs_set_header_flags(eb, flags & ~flag);
1977 return (flags & flag) == flag;
1980 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1982 u64 flags = btrfs_header_flags(eb);
1983 return flags >> BTRFS_BACKREF_REV_SHIFT;
1986 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1989 u64 flags = btrfs_header_flags(eb);
1990 flags &= ~BTRFS_BACKREF_REV_MASK;
1991 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1992 btrfs_set_header_flags(eb, flags);
1995 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1997 unsigned long ptr = offsetof(struct btrfs_header, fsid);
2001 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2003 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
2007 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2009 return btrfs_header_level(eb) == 0;
2012 /* struct btrfs_root_item */
2013 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2015 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2016 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2017 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2019 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2021 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2022 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2023 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2024 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2025 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2026 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2027 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2028 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2031 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2033 return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
2036 /* struct btrfs_root_backup */
2037 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2039 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2041 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2042 tree_root_level, 8);
2044 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2046 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2047 chunk_root_gen, 64);
2048 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2049 chunk_root_level, 8);
2051 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2053 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2054 extent_root_gen, 64);
2055 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2056 extent_root_level, 8);
2058 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2060 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2062 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2065 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2067 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2069 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2072 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2074 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2076 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2077 csum_root_level, 8);
2078 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2080 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2082 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2085 /* struct btrfs_super_block */
2087 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2088 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2089 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2091 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2092 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2093 struct btrfs_super_block, sys_chunk_array_size, 32);
2094 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2095 struct btrfs_super_block, chunk_root_generation, 64);
2096 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2098 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2100 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2101 chunk_root_level, 8);
2102 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2104 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2105 log_root_transid, 64);
2106 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2108 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2110 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2112 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2114 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2116 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2118 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2120 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2121 root_dir_objectid, 64);
2122 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2124 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2126 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2127 compat_ro_flags, 64);
2128 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2129 incompat_flags, 64);
2130 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2132 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2133 cache_generation, 64);
2135 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2137 int t = btrfs_super_csum_type(s);
2138 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2139 return btrfs_csum_sizes[t];
2142 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2144 return offsetof(struct btrfs_leaf, items);
2147 /* struct btrfs_file_extent_item */
2148 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2150 static inline unsigned long
2151 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2153 unsigned long offset = (unsigned long)e;
2154 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2158 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2160 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2163 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2165 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2167 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2168 disk_num_bytes, 64);
2169 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2171 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2173 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2175 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2177 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2179 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2180 other_encoding, 16);
2182 /* this returns the number of file bytes represented by the inline item.
2183 * If an item is compressed, this is the uncompressed size
2185 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2186 struct btrfs_file_extent_item *e)
2188 return btrfs_file_extent_ram_bytes(eb, e);
2192 * this returns the number of bytes used by the item on disk, minus the
2193 * size of any extent headers. If a file is compressed on disk, this is
2194 * the compressed size
2196 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2197 struct btrfs_item *e)
2199 unsigned long offset;
2200 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2201 return btrfs_item_size(eb, e) - offset;
2204 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
2206 return sb->s_fs_info;
2209 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2212 return root->leafsize;
2213 return root->nodesize;
2216 /* helper function to cast into the data area of the leaf. */
2217 #define btrfs_item_ptr(leaf, slot, type) \
2218 ((type *)(btrfs_leaf_data(leaf) + \
2219 btrfs_item_offset_nr(leaf, slot)))
2221 #define btrfs_item_ptr_offset(leaf, slot) \
2222 ((unsigned long)(btrfs_leaf_data(leaf) + \
2223 btrfs_item_offset_nr(leaf, slot)))
2225 static inline struct dentry *fdentry(struct file *file)
2227 return file->f_path.dentry;
2230 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2232 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2233 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2236 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2238 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2242 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2245 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2250 * Doing a truncate won't result in new nodes or leaves, just what we need for
2253 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2256 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2260 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2261 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2262 struct btrfs_root *root, unsigned long count);
2263 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2264 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2265 struct btrfs_root *root, u64 bytenr,
2266 u64 num_bytes, u64 *refs, u64 *flags);
2267 int btrfs_pin_extent(struct btrfs_root *root,
2268 u64 bytenr, u64 num, int reserved);
2269 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2270 struct btrfs_root *root,
2271 u64 bytenr, u64 num_bytes);
2272 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2273 struct btrfs_root *root,
2274 u64 objectid, u64 offset, u64 bytenr);
2275 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2276 struct btrfs_fs_info *info,
2278 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2279 u64 btrfs_find_block_group(struct btrfs_root *root,
2280 u64 search_start, u64 search_hint, int owner);
2281 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2282 struct btrfs_root *root, u32 blocksize,
2283 u64 parent, u64 root_objectid,
2284 struct btrfs_disk_key *key, int level,
2285 u64 hint, u64 empty_size);
2286 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2287 struct btrfs_root *root,
2288 struct extent_buffer *buf,
2289 u64 parent, int last_ref);
2290 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2291 struct btrfs_root *root,
2292 u64 bytenr, u32 blocksize,
2294 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2295 struct btrfs_root *root,
2296 u64 root_objectid, u64 owner,
2297 u64 offset, struct btrfs_key *ins);
2298 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2299 struct btrfs_root *root,
2300 u64 root_objectid, u64 owner, u64 offset,
2301 struct btrfs_key *ins);
2302 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2303 struct btrfs_root *root,
2304 u64 num_bytes, u64 min_alloc_size,
2305 u64 empty_size, u64 hint_byte,
2306 u64 search_end, struct btrfs_key *ins,
2308 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2309 struct extent_buffer *buf, int full_backref);
2310 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2311 struct extent_buffer *buf, int full_backref);
2312 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2313 struct btrfs_root *root,
2314 u64 bytenr, u64 num_bytes, u64 flags,
2316 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2317 struct btrfs_root *root,
2318 u64 bytenr, u64 num_bytes, u64 parent,
2319 u64 root_objectid, u64 owner, u64 offset);
2321 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2322 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2323 u64 start, u64 len);
2324 int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2325 struct btrfs_root *root);
2326 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2327 struct btrfs_root *root);
2328 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2329 struct btrfs_root *root,
2330 u64 bytenr, u64 num_bytes, u64 parent,
2331 u64 root_objectid, u64 owner, u64 offset);
2333 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2334 struct btrfs_root *root);
2335 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2336 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2337 int btrfs_read_block_groups(struct btrfs_root *root);
2338 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2339 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2340 struct btrfs_root *root, u64 bytes_used,
2341 u64 type, u64 chunk_objectid, u64 chunk_offset,
2343 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2344 struct btrfs_root *root, u64 group_start);
2345 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2346 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2347 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2348 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2349 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2350 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2351 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2352 struct btrfs_root *root);
2353 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2354 struct inode *inode);
2355 void btrfs_orphan_release_metadata(struct inode *inode);
2356 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2357 struct btrfs_pending_snapshot *pending);
2358 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2359 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2360 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2361 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2362 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2363 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2364 void btrfs_free_block_rsv(struct btrfs_root *root,
2365 struct btrfs_block_rsv *rsv);
2366 int btrfs_block_rsv_add(struct btrfs_root *root,
2367 struct btrfs_block_rsv *block_rsv,
2369 int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
2370 struct btrfs_block_rsv *block_rsv,
2372 int btrfs_block_rsv_check(struct btrfs_root *root,
2373 struct btrfs_block_rsv *block_rsv, int min_factor);
2374 int btrfs_block_rsv_refill(struct btrfs_root *root,
2375 struct btrfs_block_rsv *block_rsv,
2377 int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
2378 struct btrfs_block_rsv *block_rsv,
2380 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2381 struct btrfs_block_rsv *dst_rsv,
2383 void btrfs_block_rsv_release(struct btrfs_root *root,
2384 struct btrfs_block_rsv *block_rsv,
2386 int btrfs_set_block_group_ro(struct btrfs_root *root,
2387 struct btrfs_block_group_cache *cache);
2388 int btrfs_set_block_group_rw(struct btrfs_root *root,
2389 struct btrfs_block_group_cache *cache);
2390 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2391 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2392 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2393 u64 start, u64 end);
2394 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2395 u64 num_bytes, u64 *actual_bytes);
2396 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2397 struct btrfs_root *root, u64 type);
2398 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2400 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2402 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2403 int level, int *slot);
2404 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2405 int btrfs_previous_item(struct btrfs_root *root,
2406 struct btrfs_path *path, u64 min_objectid,
2408 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2409 struct btrfs_root *root, struct btrfs_path *path,
2410 struct btrfs_key *new_key);
2411 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2412 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2413 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2414 struct btrfs_key *key, int lowest_level,
2415 int cache_only, u64 min_trans);
2416 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2417 struct btrfs_key *max_key,
2418 struct btrfs_path *path, int cache_only,
2420 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2421 struct btrfs_root *root, struct extent_buffer *buf,
2422 struct extent_buffer *parent, int parent_slot,
2423 struct extent_buffer **cow_ret);
2424 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2425 struct btrfs_root *root,
2426 struct extent_buffer *buf,
2427 struct extent_buffer **cow_ret, u64 new_root_objectid);
2428 int btrfs_block_can_be_shared(struct btrfs_root *root,
2429 struct extent_buffer *buf);
2430 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2431 *root, struct btrfs_path *path, u32 data_size);
2432 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2433 struct btrfs_root *root,
2434 struct btrfs_path *path,
2435 u32 new_size, int from_end);
2436 int btrfs_split_item(struct btrfs_trans_handle *trans,
2437 struct btrfs_root *root,
2438 struct btrfs_path *path,
2439 struct btrfs_key *new_key,
2440 unsigned long split_offset);
2441 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2442 struct btrfs_root *root,
2443 struct btrfs_path *path,
2444 struct btrfs_key *new_key);
2445 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2446 *root, struct btrfs_key *key, struct btrfs_path *p, int
2448 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2449 struct btrfs_root *root, struct extent_buffer *parent,
2450 int start_slot, int cache_only, u64 *last_ret,
2451 struct btrfs_key *progress);
2452 void btrfs_release_path(struct btrfs_path *p);
2453 struct btrfs_path *btrfs_alloc_path(void);
2454 void btrfs_free_path(struct btrfs_path *p);
2455 void btrfs_set_path_blocking(struct btrfs_path *p);
2456 void btrfs_clear_path_blocking(struct btrfs_path *p,
2457 struct extent_buffer *held, int held_rw);
2458 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2460 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2461 struct btrfs_path *path, int slot, int nr);
2462 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2463 struct btrfs_root *root,
2464 struct btrfs_path *path)
2466 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2469 int setup_items_for_insert(struct btrfs_trans_handle *trans,
2470 struct btrfs_root *root, struct btrfs_path *path,
2471 struct btrfs_key *cpu_key, u32 *data_size,
2472 u32 total_data, u32 total_size, int nr);
2473 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2474 *root, struct btrfs_key *key, void *data, u32 data_size);
2475 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2476 struct btrfs_root *root,
2477 struct btrfs_path *path,
2478 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2480 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2481 struct btrfs_root *root,
2482 struct btrfs_path *path,
2483 struct btrfs_key *key,
2486 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2489 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2490 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2491 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2492 void btrfs_drop_snapshot(struct btrfs_root *root,
2493 struct btrfs_block_rsv *block_rsv, int update_ref);
2494 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2495 struct btrfs_root *root,
2496 struct extent_buffer *node,
2497 struct extent_buffer *parent);
2498 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2501 * Get synced with close_ctree()
2504 return fs_info->closing;
2506 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2508 kfree(fs_info->delayed_root);
2509 kfree(fs_info->extent_root);
2510 kfree(fs_info->tree_root);
2511 kfree(fs_info->chunk_root);
2512 kfree(fs_info->dev_root);
2513 kfree(fs_info->csum_root);
2514 kfree(fs_info->super_copy);
2515 kfree(fs_info->super_for_commit);
2520 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2521 struct btrfs_path *path,
2522 u64 root_id, u64 ref_id);
2523 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2524 struct btrfs_root *tree_root,
2525 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2526 const char *name, int name_len);
2527 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2528 struct btrfs_root *tree_root,
2529 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2530 const char *name, int name_len);
2531 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2532 struct btrfs_key *key);
2533 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2534 *root, struct btrfs_key *key, struct btrfs_root_item
2536 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2537 *root, struct btrfs_key *key, struct btrfs_root_item
2539 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2540 btrfs_root_item *item, struct btrfs_key *key);
2541 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2542 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2543 void btrfs_set_root_node(struct btrfs_root_item *item,
2544 struct extent_buffer *node);
2545 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2548 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2549 struct btrfs_root *root, const char *name,
2550 int name_len, struct inode *dir,
2551 struct btrfs_key *location, u8 type, u64 index);
2552 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2553 struct btrfs_root *root,
2554 struct btrfs_path *path, u64 dir,
2555 const char *name, int name_len,
2557 struct btrfs_dir_item *
2558 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2559 struct btrfs_root *root,
2560 struct btrfs_path *path, u64 dir,
2561 u64 objectid, const char *name, int name_len,
2563 struct btrfs_dir_item *
2564 btrfs_search_dir_index_item(struct btrfs_root *root,
2565 struct btrfs_path *path, u64 dirid,
2566 const char *name, int name_len);
2567 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2568 struct btrfs_path *path,
2569 const char *name, int name_len);
2570 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2571 struct btrfs_root *root,
2572 struct btrfs_path *path,
2573 struct btrfs_dir_item *di);
2574 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2575 struct btrfs_root *root,
2576 struct btrfs_path *path, u64 objectid,
2577 const char *name, u16 name_len,
2578 const void *data, u16 data_len);
2579 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2580 struct btrfs_root *root,
2581 struct btrfs_path *path, u64 dir,
2582 const char *name, u16 name_len,
2584 int verify_dir_item(struct btrfs_root *root,
2585 struct extent_buffer *leaf,
2586 struct btrfs_dir_item *dir_item);
2589 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2590 struct btrfs_root *root, u64 offset);
2591 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2592 struct btrfs_root *root, u64 offset);
2593 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2596 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2597 struct btrfs_root *root,
2598 const char *name, int name_len,
2599 u64 inode_objectid, u64 ref_objectid, u64 index);
2600 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2601 struct btrfs_root *root,
2602 const char *name, int name_len,
2603 u64 inode_objectid, u64 ref_objectid, u64 *index);
2604 struct btrfs_inode_ref *
2605 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2606 struct btrfs_root *root,
2607 struct btrfs_path *path,
2608 const char *name, int name_len,
2609 u64 inode_objectid, u64 ref_objectid, int mod);
2610 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2611 struct btrfs_root *root,
2612 struct btrfs_path *path, u64 objectid);
2613 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2614 *root, struct btrfs_path *path,
2615 struct btrfs_key *location, int mod);
2618 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2619 struct btrfs_root *root, u64 bytenr, u64 len);
2620 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2621 struct bio *bio, u32 *dst);
2622 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2623 struct bio *bio, u64 logical_offset, u32 *dst);
2624 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2625 struct btrfs_root *root,
2626 u64 objectid, u64 pos,
2627 u64 disk_offset, u64 disk_num_bytes,
2628 u64 num_bytes, u64 offset, u64 ram_bytes,
2629 u8 compression, u8 encryption, u16 other_encoding);
2630 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2631 struct btrfs_root *root,
2632 struct btrfs_path *path, u64 objectid,
2633 u64 bytenr, int mod);
2634 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2635 struct btrfs_root *root,
2636 struct btrfs_ordered_sum *sums);
2637 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2638 struct bio *bio, u64 file_start, int contig);
2639 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2640 struct btrfs_root *root,
2641 struct btrfs_path *path,
2642 u64 bytenr, int cow);
2643 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2644 struct btrfs_root *root, struct btrfs_path *path,
2646 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2647 struct list_head *list, int search_commit);
2649 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
2650 size_t pg_offset, u64 start, u64 len,
2653 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2654 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2655 #define ClearPageChecked ClearPageFsMisc
2656 #define SetPageChecked SetPageFsMisc
2657 #define PageChecked PageFsMisc
2660 /* This forces readahead on a given range of bytes in an inode */
2661 static inline void btrfs_force_ra(struct address_space *mapping,
2662 struct file_ra_state *ra, struct file *file,
2663 pgoff_t offset, unsigned long req_size)
2665 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
2668 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2669 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2670 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2671 struct btrfs_root *root,
2672 struct inode *dir, struct inode *inode,
2673 const char *name, int name_len);
2674 int btrfs_add_link(struct btrfs_trans_handle *trans,
2675 struct inode *parent_inode, struct inode *inode,
2676 const char *name, int name_len, int add_backref, u64 index);
2677 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2678 struct btrfs_root *root,
2679 struct inode *dir, u64 objectid,
2680 const char *name, int name_len);
2681 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2682 struct btrfs_root *root,
2683 struct inode *inode, u64 new_size,
2686 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2687 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2688 struct extent_state **cached_state);
2689 int btrfs_writepages(struct address_space *mapping,
2690 struct writeback_control *wbc);
2691 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2692 struct btrfs_root *new_root, u64 new_dirid);
2693 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2694 size_t size, struct bio *bio, unsigned long bio_flags);
2696 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2697 int btrfs_readpage(struct file *file, struct page *page);
2698 void btrfs_evict_inode(struct inode *inode);
2699 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2700 int btrfs_dirty_inode(struct inode *inode);
2701 int btrfs_update_time(struct file *file);
2702 struct inode *btrfs_alloc_inode(struct super_block *sb);
2703 void btrfs_destroy_inode(struct inode *inode);
2704 int btrfs_drop_inode(struct inode *inode);
2705 int btrfs_init_cachep(void);
2706 void btrfs_destroy_cachep(void);
2707 long btrfs_ioctl_trans_end(struct file *file);
2708 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2709 struct btrfs_root *root, int *was_new);
2710 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2711 size_t pg_offset, u64 start, u64 end,
2713 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2714 struct btrfs_root *root,
2715 struct inode *inode);
2716 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2717 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2718 int btrfs_orphan_cleanup(struct btrfs_root *root);
2719 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2720 struct btrfs_root *root);
2721 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2722 int btrfs_invalidate_inodes(struct btrfs_root *root);
2723 void btrfs_add_delayed_iput(struct inode *inode);
2724 void btrfs_run_delayed_iputs(struct btrfs_root *root);
2725 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2726 u64 start, u64 num_bytes, u64 min_size,
2727 loff_t actual_len, u64 *alloc_hint);
2728 int btrfs_prealloc_file_range_trans(struct inode *inode,
2729 struct btrfs_trans_handle *trans, int mode,
2730 u64 start, u64 num_bytes, u64 min_size,
2731 loff_t actual_len, u64 *alloc_hint);
2732 extern const struct dentry_operations btrfs_dentry_operations;
2735 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2736 void btrfs_update_iflags(struct inode *inode);
2737 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
2738 int btrfs_defrag_file(struct inode *inode, struct file *file,
2739 struct btrfs_ioctl_defrag_range_args *range,
2740 u64 newer_than, unsigned long max_pages);
2742 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2743 struct inode *inode);
2744 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2745 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2746 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2748 extern const struct file_operations btrfs_file_operations;
2749 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2750 u64 start, u64 end, u64 *hint_byte, int drop_cache);
2751 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2752 struct inode *inode, u64 start, u64 end);
2753 int btrfs_release_file(struct inode *inode, struct file *file);
2754 void btrfs_drop_pages(struct page **pages, size_t num_pages);
2755 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
2756 struct page **pages, size_t num_pages,
2757 loff_t pos, size_t write_bytes,
2758 struct extent_state **cached);
2761 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2762 struct btrfs_root *root, int cache_only);
2765 int btrfs_init_sysfs(void);
2766 void btrfs_exit_sysfs(void);
2769 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2772 int btrfs_parse_options(struct btrfs_root *root, char *options);
2773 int btrfs_sync_fs(struct super_block *sb, int wait);
2774 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
2775 unsigned int line, int errno);
2777 #define btrfs_std_error(fs_info, errno) \
2780 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2784 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2785 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
2786 int btrfs_init_acl(struct btrfs_trans_handle *trans,
2787 struct inode *inode, struct inode *dir);
2788 int btrfs_acl_chmod(struct inode *inode);
2790 #define btrfs_get_acl NULL
2791 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
2792 struct inode *inode, struct inode *dir)
2796 static inline int btrfs_acl_chmod(struct inode *inode)
2803 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2804 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2805 struct btrfs_root *root);
2806 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2807 struct btrfs_root *root);
2808 int btrfs_recover_relocation(struct btrfs_root *root);
2809 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
2810 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
2811 struct btrfs_root *root, struct extent_buffer *buf,
2812 struct extent_buffer *cow);
2813 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
2814 struct btrfs_pending_snapshot *pending,
2815 u64 *bytes_to_reserve);
2816 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
2817 struct btrfs_pending_snapshot *pending);
2820 int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
2821 struct btrfs_scrub_progress *progress, int readonly);
2822 int btrfs_scrub_pause(struct btrfs_root *root);
2823 int btrfs_scrub_pause_super(struct btrfs_root *root);
2824 int btrfs_scrub_continue(struct btrfs_root *root);
2825 int btrfs_scrub_continue_super(struct btrfs_root *root);
2826 int btrfs_scrub_cancel(struct btrfs_root *root);
2827 int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
2828 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
2829 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
2830 struct btrfs_scrub_progress *progress);
2833 struct reada_control {
2834 struct btrfs_root *root; /* tree to prefetch */
2835 struct btrfs_key key_start;
2836 struct btrfs_key key_end; /* exclusive */
2839 wait_queue_head_t wait;
2841 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
2842 struct btrfs_key *start, struct btrfs_key *end);
2843 int btrfs_reada_wait(void *handle);
2844 void btrfs_reada_detach(void *handle);
2845 int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
2846 u64 start, int err);