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__
22 #include <linux/version.h>
24 #include <linux/highmem.h>
26 #include <linux/rwsem.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.h>
29 #include <linux/wait.h>
30 #include <linux/slab.h>
31 #include <linux/kobject.h>
32 #include <trace/events/btrfs.h>
33 #include <asm/kmap_types.h>
34 #include "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
110 /* dummy objectid represents multiple objectids */
111 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
114 * All files have objectids in this range.
116 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
117 #define BTRFS_LAST_FREE_OBJECTID -256ULL
118 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
122 * the device items go into the chunk tree. The key is in the form
123 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
125 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
127 #define BTRFS_BTREE_INODE_OBJECTID 1
129 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
132 * we can actually store much bigger names, but lets not confuse the rest
135 #define BTRFS_NAME_LEN 255
137 /* 32 bytes in various csum fields */
138 #define BTRFS_CSUM_SIZE 32
141 #define BTRFS_CSUM_TYPE_CRC32 0
143 static int btrfs_csum_sizes[] = { 4, 0 };
145 /* four bytes for CRC32 */
146 #define BTRFS_EMPTY_DIR_SIZE 0
148 #define BTRFS_FT_UNKNOWN 0
149 #define BTRFS_FT_REG_FILE 1
150 #define BTRFS_FT_DIR 2
151 #define BTRFS_FT_CHRDEV 3
152 #define BTRFS_FT_BLKDEV 4
153 #define BTRFS_FT_FIFO 5
154 #define BTRFS_FT_SOCK 6
155 #define BTRFS_FT_SYMLINK 7
156 #define BTRFS_FT_XATTR 8
157 #define BTRFS_FT_MAX 9
160 * The key defines the order in the tree, and so it also defines (optimal)
163 * objectid corresponds to the inode number.
165 * type tells us things about the object, and is a kind of stream selector.
166 * so for a given inode, keys with type of 1 might refer to the inode data,
167 * type of 2 may point to file data in the btree and type == 3 may point to
170 * offset is the starting byte offset for this key in the stream.
172 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
173 * in cpu native order. Otherwise they are identical and their sizes
174 * should be the same (ie both packed)
176 struct btrfs_disk_key {
180 } __attribute__ ((__packed__));
186 } __attribute__ ((__packed__));
188 struct btrfs_mapping_tree {
189 struct extent_map_tree map_tree;
192 #define BTRFS_UUID_SIZE 16
193 struct btrfs_dev_item {
194 /* the internal btrfs device id */
197 /* size of the device */
203 /* optimal io alignment for this device */
206 /* optimal io width for this device */
209 /* minimal io size for this device */
212 /* type and info about this device */
215 /* expected generation for this device */
219 * starting byte of this partition on the device,
220 * to allow for stripe alignment in the future
224 /* grouping information for allocation decisions */
227 /* seek speed 0-100 where 100 is fastest */
230 /* bandwidth 0-100 where 100 is fastest */
233 /* btrfs generated uuid for this device */
234 u8 uuid[BTRFS_UUID_SIZE];
236 /* uuid of FS who owns this device */
237 u8 fsid[BTRFS_UUID_SIZE];
238 } __attribute__ ((__packed__));
240 struct btrfs_stripe {
243 u8 dev_uuid[BTRFS_UUID_SIZE];
244 } __attribute__ ((__packed__));
247 /* size of this chunk in bytes */
250 /* objectid of the root referencing this chunk */
256 /* optimal io alignment for this chunk */
259 /* optimal io width for this chunk */
262 /* minimal io size for this chunk */
265 /* 2^16 stripes is quite a lot, a second limit is the size of a single
270 /* sub stripes only matter for raid10 */
272 struct btrfs_stripe stripe;
273 /* additional stripes go here */
274 } __attribute__ ((__packed__));
276 #define BTRFS_FREE_SPACE_EXTENT 1
277 #define BTRFS_FREE_SPACE_BITMAP 2
279 struct btrfs_free_space_entry {
283 } __attribute__ ((__packed__));
285 struct btrfs_free_space_header {
286 struct btrfs_disk_key location;
290 } __attribute__ ((__packed__));
292 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
294 BUG_ON(num_stripes == 0);
295 return sizeof(struct btrfs_chunk) +
296 sizeof(struct btrfs_stripe) * (num_stripes - 1);
299 #define BTRFS_FSID_SIZE 16
300 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
301 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
307 /* Errors detected */
308 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
310 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
311 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
313 #define BTRFS_BACKREF_REV_MAX 256
314 #define BTRFS_BACKREF_REV_SHIFT 56
315 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
316 BTRFS_BACKREF_REV_SHIFT)
318 #define BTRFS_OLD_BACKREF_REV 0
319 #define BTRFS_MIXED_BACKREF_REV 1
322 * every tree block (leaf or node) starts with this header.
324 struct btrfs_header {
325 /* these first four must match the super block */
326 u8 csum[BTRFS_CSUM_SIZE];
327 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
328 __le64 bytenr; /* which block this node is supposed to live in */
331 /* allowed to be different from the super from here on down */
332 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
337 } __attribute__ ((__packed__));
339 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
340 sizeof(struct btrfs_header)) / \
341 sizeof(struct btrfs_key_ptr))
342 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
343 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
344 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
345 sizeof(struct btrfs_item) - \
346 sizeof(struct btrfs_file_extent_item))
347 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
348 sizeof(struct btrfs_item) -\
349 sizeof(struct btrfs_dir_item))
353 * this is a very generous portion of the super block, giving us
354 * room to translate 14 chunks with 3 stripes each.
356 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
357 #define BTRFS_LABEL_SIZE 256
360 * the super block basically lists the main trees of the FS
361 * it currently lacks any block count etc etc
363 struct btrfs_super_block {
364 u8 csum[BTRFS_CSUM_SIZE];
365 /* the first 4 fields must match struct btrfs_header */
366 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
367 __le64 bytenr; /* this block number */
370 /* allowed to be different from the btrfs_header from here own down */
377 /* this will help find the new super based on the log root */
378 __le64 log_root_transid;
381 __le64 root_dir_objectid;
387 __le32 sys_chunk_array_size;
388 __le64 chunk_root_generation;
390 __le64 compat_ro_flags;
391 __le64 incompat_flags;
396 struct btrfs_dev_item dev_item;
398 char label[BTRFS_LABEL_SIZE];
400 __le64 cache_generation;
402 /* future expansion */
404 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
405 } __attribute__ ((__packed__));
408 * Compat flags that we support. If any incompat flags are set other than the
409 * ones specified below then we will fail to mount
411 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
412 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
413 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
414 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
416 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
417 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
418 #define BTRFS_FEATURE_INCOMPAT_SUPP \
419 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
420 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
421 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
422 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
425 * A leaf is full of items. offset and size tell us where to find
426 * the item in the leaf (relative to the start of the data area)
429 struct btrfs_disk_key key;
432 } __attribute__ ((__packed__));
435 * leaves have an item area and a data area:
436 * [item0, item1....itemN] [free space] [dataN...data1, data0]
438 * The data is separate from the items to get the keys closer together
442 struct btrfs_header header;
443 struct btrfs_item items[];
444 } __attribute__ ((__packed__));
447 * all non-leaf blocks are nodes, they hold only keys and pointers to
450 struct btrfs_key_ptr {
451 struct btrfs_disk_key key;
454 } __attribute__ ((__packed__));
457 struct btrfs_header header;
458 struct btrfs_key_ptr ptrs[];
459 } __attribute__ ((__packed__));
462 * btrfs_paths remember the path taken from the root down to the leaf.
463 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
464 * to any other levels that are present.
466 * The slots array records the index of the item or block pointer
467 * used while walking the tree.
470 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
471 int slots[BTRFS_MAX_LEVEL];
472 /* if there is real range locking, this locks field will change */
473 int locks[BTRFS_MAX_LEVEL];
475 /* keep some upper locks as we walk down */
479 * set by btrfs_split_item, tells search_slot to keep all locks
480 * and to force calls to keep space in the nodes
482 unsigned int search_for_split:1;
483 unsigned int keep_locks:1;
484 unsigned int skip_locking:1;
485 unsigned int leave_spinning:1;
486 unsigned int search_commit_root:1;
490 * items in the extent btree are used to record the objectid of the
491 * owner of the block and the number of references
494 struct btrfs_extent_item {
498 } __attribute__ ((__packed__));
500 struct btrfs_extent_item_v0 {
502 } __attribute__ ((__packed__));
504 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
505 sizeof(struct btrfs_item))
507 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
508 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
510 /* following flags only apply to tree blocks */
512 /* use full backrefs for extent pointers in the block */
513 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
516 * this flag is only used internally by scrub and may be changed at any time
517 * it is only declared here to avoid collisions
519 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
521 struct btrfs_tree_block_info {
522 struct btrfs_disk_key key;
524 } __attribute__ ((__packed__));
526 struct btrfs_extent_data_ref {
531 } __attribute__ ((__packed__));
533 struct btrfs_shared_data_ref {
535 } __attribute__ ((__packed__));
537 struct btrfs_extent_inline_ref {
540 } __attribute__ ((__packed__));
542 /* old style backrefs item */
543 struct btrfs_extent_ref_v0 {
548 } __attribute__ ((__packed__));
551 /* dev extents record free space on individual devices. The owner
552 * field points back to the chunk allocation mapping tree that allocated
553 * the extent. The chunk tree uuid field is a way to double check the owner
555 struct btrfs_dev_extent {
557 __le64 chunk_objectid;
560 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
561 } __attribute__ ((__packed__));
563 struct btrfs_inode_ref {
567 } __attribute__ ((__packed__));
569 struct btrfs_timespec {
572 } __attribute__ ((__packed__));
574 enum btrfs_compression_type {
575 BTRFS_COMPRESS_NONE = 0,
576 BTRFS_COMPRESS_ZLIB = 1,
577 BTRFS_COMPRESS_LZO = 2,
578 BTRFS_COMPRESS_TYPES = 2,
579 BTRFS_COMPRESS_LAST = 3,
582 struct btrfs_inode_item {
583 /* nfs style generation number */
585 /* transid that last touched this inode */
597 /* modification sequence number for NFS */
601 * a little future expansion, for more than this we can
602 * just grow the inode item and version it
605 struct btrfs_timespec atime;
606 struct btrfs_timespec ctime;
607 struct btrfs_timespec mtime;
608 struct btrfs_timespec otime;
609 } __attribute__ ((__packed__));
611 struct btrfs_dir_log_item {
613 } __attribute__ ((__packed__));
615 struct btrfs_dir_item {
616 struct btrfs_disk_key location;
621 } __attribute__ ((__packed__));
623 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
625 struct btrfs_root_item {
626 struct btrfs_inode_item inode;
632 __le64 last_snapshot;
635 struct btrfs_disk_key drop_progress;
638 } __attribute__ ((__packed__));
641 * this is used for both forward and backward root refs
643 struct btrfs_root_ref {
647 } __attribute__ ((__packed__));
649 #define BTRFS_FILE_EXTENT_INLINE 0
650 #define BTRFS_FILE_EXTENT_REG 1
651 #define BTRFS_FILE_EXTENT_PREALLOC 2
653 struct btrfs_file_extent_item {
655 * transaction id that created this extent
659 * max number of bytes to hold this extent in ram
660 * when we split a compressed extent we can't know how big
661 * each of the resulting pieces will be. So, this is
662 * an upper limit on the size of the extent in ram instead of
668 * 32 bits for the various ways we might encode the data,
669 * including compression and encryption. If any of these
670 * are set to something a given disk format doesn't understand
671 * it is treated like an incompat flag for reading and writing,
676 __le16 other_encoding; /* spare for later use */
678 /* are we inline data or a real extent? */
682 * disk space consumed by the extent, checksum blocks are included
686 __le64 disk_num_bytes;
688 * the logical offset in file blocks (no csums)
689 * this extent record is for. This allows a file extent to point
690 * into the middle of an existing extent on disk, sharing it
691 * between two snapshots (useful if some bytes in the middle of the
692 * extent have changed
696 * the logical number of file blocks (no csums included). This
697 * always reflects the size uncompressed and without encoding.
701 } __attribute__ ((__packed__));
703 struct btrfs_csum_item {
705 } __attribute__ ((__packed__));
707 /* different types of block groups (and chunks) */
708 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
709 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
710 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
711 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
712 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
713 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
714 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
715 #define BTRFS_NR_RAID_TYPES 5
717 struct btrfs_block_group_item {
719 __le64 chunk_objectid;
721 } __attribute__ ((__packed__));
723 struct btrfs_space_info {
726 u64 total_bytes; /* total bytes in the space,
727 this doesn't take mirrors into account */
728 u64 bytes_used; /* total bytes used,
729 this does't take mirrors into account */
730 u64 bytes_pinned; /* total bytes pinned, will be freed when the
731 transaction finishes */
732 u64 bytes_reserved; /* total bytes the allocator has reserved for
733 current allocations */
734 u64 bytes_readonly; /* total bytes that are read only */
736 u64 bytes_may_use; /* number of bytes that may be used for
737 delalloc/allocations */
738 u64 disk_used; /* total bytes used on disk */
739 u64 disk_total; /* total bytes on disk, takes mirrors into
743 * we bump reservation progress every time we decrement
744 * bytes_reserved. This way people waiting for reservations
745 * know something good has happened and they can check
746 * for progress. The number here isn't to be trusted, it
747 * just shows reclaim activity
749 unsigned long reservation_progress;
751 int full:1; /* indicates that we cannot allocate any more
752 chunks for this space */
753 int chunk_alloc:1; /* set if we are allocating a chunk */
755 int force_alloc; /* set if we need to force a chunk alloc for
758 struct list_head list;
760 /* for block groups in our same type */
761 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
763 struct rw_semaphore groups_sem;
764 atomic_t caching_threads;
767 struct btrfs_block_rsv {
771 struct btrfs_space_info *space_info;
772 struct list_head list;
775 unsigned int priority:8;
776 unsigned int durable:1;
777 unsigned int refill_used:1;
782 * free clusters are used to claim free space in relatively large chunks,
783 * allowing us to do less seeky writes. They are used for all metadata
784 * allocations and data allocations in ssd mode.
786 struct btrfs_free_cluster {
788 spinlock_t refill_lock;
791 /* largest extent in this cluster */
794 /* first extent starting offset */
797 struct btrfs_block_group_cache *block_group;
799 * when a cluster is allocated from a block group, we put the
800 * cluster onto a list in the block group so that it can
801 * be freed before the block group is freed.
803 struct list_head block_group_list;
806 enum btrfs_caching_type {
808 BTRFS_CACHE_STARTED = 1,
809 BTRFS_CACHE_FINISHED = 2,
812 enum btrfs_disk_cache_state {
813 BTRFS_DC_WRITTEN = 0,
817 BTRFS_DC_NEED_WRITE = 4,
820 struct btrfs_caching_control {
821 struct list_head list;
823 wait_queue_head_t wait;
824 struct btrfs_block_group_cache *block_group;
829 struct btrfs_block_group_cache {
830 struct btrfs_key key;
831 struct btrfs_block_group_item item;
832 struct btrfs_fs_info *fs_info;
845 unsigned int dirty:1;
848 int disk_cache_state;
850 /* cache tracking stuff */
852 struct btrfs_caching_control *caching_ctl;
853 u64 last_byte_to_unpin;
855 struct btrfs_space_info *space_info;
857 /* free space cache stuff */
858 spinlock_t tree_lock;
859 struct rb_root free_space_offset;
862 /* block group cache stuff */
863 struct rb_node cache_node;
865 /* for block groups in the same raid type */
866 struct list_head list;
871 /* List of struct btrfs_free_clusters for this block group.
872 * Today it will only have one thing on it, but that may change
874 struct list_head cluster_list;
877 struct reloc_control;
879 struct btrfs_fs_devices;
880 struct btrfs_fs_info {
881 u8 fsid[BTRFS_FSID_SIZE];
882 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
883 struct btrfs_root *extent_root;
884 struct btrfs_root *tree_root;
885 struct btrfs_root *chunk_root;
886 struct btrfs_root *dev_root;
887 struct btrfs_root *fs_root;
888 struct btrfs_root *csum_root;
890 /* the log root tree is a directory of all the other log roots */
891 struct btrfs_root *log_root_tree;
893 spinlock_t fs_roots_radix_lock;
894 struct radix_tree_root fs_roots_radix;
896 /* block group cache stuff */
897 spinlock_t block_group_cache_lock;
898 struct rb_root block_group_cache_tree;
900 struct extent_io_tree freed_extents[2];
901 struct extent_io_tree *pinned_extents;
903 /* logical->physical extent mapping */
904 struct btrfs_mapping_tree mapping_tree;
906 /* block reservation for extent, checksum and root tree */
907 struct btrfs_block_rsv global_block_rsv;
908 /* block reservation for delay allocation */
909 struct btrfs_block_rsv delalloc_block_rsv;
910 /* block reservation for metadata operations */
911 struct btrfs_block_rsv trans_block_rsv;
912 /* block reservation for chunk tree */
913 struct btrfs_block_rsv chunk_block_rsv;
915 struct btrfs_block_rsv empty_block_rsv;
917 /* list of block reservations that cross multiple transactions */
918 struct list_head durable_block_rsv_list;
920 struct mutex durable_block_rsv_mutex;
923 u64 last_trans_committed;
926 * this is updated to the current trans every time a full commit
927 * is required instead of the faster short fsync log commits
929 u64 last_trans_log_full_commit;
930 u64 open_ioctl_trans;
931 unsigned long mount_opt:20;
932 unsigned long compress_type:4;
935 struct btrfs_transaction *running_transaction;
936 wait_queue_head_t transaction_throttle;
937 wait_queue_head_t transaction_wait;
938 wait_queue_head_t transaction_blocked_wait;
939 wait_queue_head_t async_submit_wait;
941 struct btrfs_super_block super_copy;
942 struct btrfs_super_block super_for_commit;
943 struct block_device *__bdev;
944 struct super_block *sb;
945 struct inode *btree_inode;
946 struct backing_dev_info bdi;
947 struct mutex trans_mutex;
948 struct mutex tree_log_mutex;
949 struct mutex transaction_kthread_mutex;
950 struct mutex cleaner_mutex;
951 struct mutex chunk_mutex;
952 struct mutex volume_mutex;
954 * this protects the ordered operations list only while we are
955 * processing all of the entries on it. This way we make
956 * sure the commit code doesn't find the list temporarily empty
957 * because another function happens to be doing non-waiting preflush
958 * before jumping into the main commit.
960 struct mutex ordered_operations_mutex;
961 struct rw_semaphore extent_commit_sem;
963 struct rw_semaphore cleanup_work_sem;
965 struct rw_semaphore subvol_sem;
966 struct srcu_struct subvol_srcu;
968 struct list_head trans_list;
969 struct list_head hashers;
970 struct list_head dead_roots;
971 struct list_head caching_block_groups;
973 spinlock_t delayed_iput_lock;
974 struct list_head delayed_iputs;
976 atomic_t nr_async_submits;
977 atomic_t async_submit_draining;
978 atomic_t nr_async_bios;
979 atomic_t async_delalloc_pages;
982 * this is used by the balancing code to wait for all the pending
985 spinlock_t ordered_extent_lock;
988 * all of the data=ordered extents pending writeback
989 * these can span multiple transactions and basically include
990 * every dirty data page that isn't from nodatacow
992 struct list_head ordered_extents;
995 * all of the inodes that have delalloc bytes. It is possible for
996 * this list to be empty even when there is still dirty data=ordered
997 * extents waiting to finish IO.
999 struct list_head delalloc_inodes;
1002 * special rename and truncate targets that must be on disk before
1003 * we're allowed to commit. This is basically the ext3 style
1004 * data=ordered list.
1006 struct list_head ordered_operations;
1009 * there is a pool of worker threads for checksumming during writes
1010 * and a pool for checksumming after reads. This is because readers
1011 * can run with FS locks held, and the writers may be waiting for
1012 * those locks. We don't want ordering in the pending list to cause
1013 * deadlocks, and so the two are serviced separately.
1015 * A third pool does submit_bio to avoid deadlocking with the other
1018 struct btrfs_workers generic_worker;
1019 struct btrfs_workers workers;
1020 struct btrfs_workers delalloc_workers;
1021 struct btrfs_workers endio_workers;
1022 struct btrfs_workers endio_meta_workers;
1023 struct btrfs_workers endio_meta_write_workers;
1024 struct btrfs_workers endio_write_workers;
1025 struct btrfs_workers endio_freespace_worker;
1026 struct btrfs_workers submit_workers;
1028 * fixup workers take dirty pages that didn't properly go through
1029 * the cow mechanism and make them safe to write. It happens
1030 * for the sys_munmap function call path
1032 struct btrfs_workers fixup_workers;
1033 struct task_struct *transaction_kthread;
1034 struct task_struct *cleaner_kthread;
1035 int thread_pool_size;
1037 struct kobject super_kobj;
1038 struct completion kobj_unregister;
1041 int log_root_recovering;
1046 /* protected by the delalloc lock, used to keep from writing
1047 * metadata until there is a nice batch
1049 u64 dirty_metadata_bytes;
1050 struct list_head dirty_cowonly_roots;
1052 struct btrfs_fs_devices *fs_devices;
1055 * the space_info list is almost entirely read only. It only changes
1056 * when we add a new raid type to the FS, and that happens
1057 * very rarely. RCU is used to protect it.
1059 struct list_head space_info;
1061 struct reloc_control *reloc_ctl;
1063 spinlock_t delalloc_lock;
1064 spinlock_t new_trans_lock;
1067 /* data_alloc_cluster is only used in ssd mode */
1068 struct btrfs_free_cluster data_alloc_cluster;
1070 /* all metadata allocations go through this cluster */
1071 struct btrfs_free_cluster meta_alloc_cluster;
1073 spinlock_t ref_cache_lock;
1074 u64 total_ref_cache_size;
1076 u64 avail_data_alloc_bits;
1077 u64 avail_metadata_alloc_bits;
1078 u64 avail_system_alloc_bits;
1079 u64 data_alloc_profile;
1080 u64 metadata_alloc_profile;
1081 u64 system_alloc_profile;
1083 unsigned data_chunk_allocations;
1084 unsigned metadata_ratio;
1088 /* private scrub information */
1089 struct mutex scrub_lock;
1090 atomic_t scrubs_running;
1091 atomic_t scrub_pause_req;
1092 atomic_t scrubs_paused;
1093 atomic_t scrub_cancel_req;
1094 wait_queue_head_t scrub_pause_wait;
1095 struct rw_semaphore scrub_super_lock;
1096 int scrub_workers_refcnt;
1097 struct btrfs_workers scrub_workers;
1099 /* filesystem state */
1104 * in ram representation of the tree. extent_root is used for all allocations
1105 * and for the extent tree extent_root root.
1108 struct extent_buffer *node;
1110 /* the node lock is held while changing the node pointer */
1111 spinlock_t node_lock;
1113 struct extent_buffer *commit_root;
1114 struct btrfs_root *log_root;
1115 struct btrfs_root *reloc_root;
1117 struct btrfs_root_item root_item;
1118 struct btrfs_key root_key;
1119 struct btrfs_fs_info *fs_info;
1120 struct extent_io_tree dirty_log_pages;
1122 struct kobject root_kobj;
1123 struct completion kobj_unregister;
1124 struct mutex objectid_mutex;
1126 spinlock_t accounting_lock;
1127 struct btrfs_block_rsv *block_rsv;
1129 struct mutex log_mutex;
1130 wait_queue_head_t log_writer_wait;
1131 wait_queue_head_t log_commit_wait[2];
1132 atomic_t log_writers;
1133 atomic_t log_commit[2];
1134 unsigned long log_transid;
1135 unsigned long last_log_commit;
1136 unsigned long log_batch;
1137 pid_t log_start_pid;
1138 bool log_multiple_pids;
1143 /* data allocations are done in sectorsize units */
1146 /* node allocations are done in nodesize units */
1149 /* leaf allocations are done in leafsize units */
1156 u64 highest_objectid;
1161 u64 defrag_trans_start;
1162 struct btrfs_key defrag_progress;
1163 struct btrfs_key defrag_max;
1168 /* the dirty list is only used by non-reference counted roots */
1169 struct list_head dirty_list;
1171 struct list_head root_list;
1173 spinlock_t orphan_lock;
1174 struct list_head orphan_list;
1175 struct btrfs_block_rsv *orphan_block_rsv;
1176 int orphan_item_inserted;
1177 int orphan_cleanup_state;
1179 spinlock_t inode_lock;
1180 /* red-black tree that keeps track of in-memory inodes */
1181 struct rb_root inode_tree;
1184 * right now this just gets used so that a root has its own devid
1185 * for stat. It may be used for more later
1187 struct super_block anon_super;
1191 * inode items have the data typically returned from stat and store other
1192 * info about object characteristics. There is one for every file and dir in
1195 #define BTRFS_INODE_ITEM_KEY 1
1196 #define BTRFS_INODE_REF_KEY 12
1197 #define BTRFS_XATTR_ITEM_KEY 24
1198 #define BTRFS_ORPHAN_ITEM_KEY 48
1199 /* reserve 2-15 close to the inode for later flexibility */
1202 * dir items are the name -> inode pointers in a directory. There is one
1203 * for every name in a directory.
1205 #define BTRFS_DIR_LOG_ITEM_KEY 60
1206 #define BTRFS_DIR_LOG_INDEX_KEY 72
1207 #define BTRFS_DIR_ITEM_KEY 84
1208 #define BTRFS_DIR_INDEX_KEY 96
1210 * extent data is for file data
1212 #define BTRFS_EXTENT_DATA_KEY 108
1215 * extent csums are stored in a separate tree and hold csums for
1216 * an entire extent on disk.
1218 #define BTRFS_EXTENT_CSUM_KEY 128
1221 * root items point to tree roots. They are typically in the root
1222 * tree used by the super block to find all the other trees
1224 #define BTRFS_ROOT_ITEM_KEY 132
1227 * root backrefs tie subvols and snapshots to the directory entries that
1230 #define BTRFS_ROOT_BACKREF_KEY 144
1233 * root refs make a fast index for listing all of the snapshots and
1234 * subvolumes referenced by a given root. They point directly to the
1235 * directory item in the root that references the subvol
1237 #define BTRFS_ROOT_REF_KEY 156
1240 * extent items are in the extent map tree. These record which blocks
1241 * are used, and how many references there are to each block
1243 #define BTRFS_EXTENT_ITEM_KEY 168
1245 #define BTRFS_TREE_BLOCK_REF_KEY 176
1247 #define BTRFS_EXTENT_DATA_REF_KEY 178
1249 #define BTRFS_EXTENT_REF_V0_KEY 180
1251 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1253 #define BTRFS_SHARED_DATA_REF_KEY 184
1256 * block groups give us hints into the extent allocation trees. Which
1257 * blocks are free etc etc
1259 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1261 #define BTRFS_DEV_EXTENT_KEY 204
1262 #define BTRFS_DEV_ITEM_KEY 216
1263 #define BTRFS_CHUNK_ITEM_KEY 228
1266 * string items are for debugging. They just store a short string of
1269 #define BTRFS_STRING_ITEM_KEY 253
1271 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1272 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1273 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1274 #define BTRFS_MOUNT_SSD (1 << 3)
1275 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1276 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1277 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1278 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1279 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1280 #define BTRFS_MOUNT_NOSSD (1 << 9)
1281 #define BTRFS_MOUNT_DISCARD (1 << 10)
1282 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1283 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1284 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1285 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1286 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1288 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1289 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1290 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1295 #define BTRFS_INODE_NODATASUM (1 << 0)
1296 #define BTRFS_INODE_NODATACOW (1 << 1)
1297 #define BTRFS_INODE_READONLY (1 << 2)
1298 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1299 #define BTRFS_INODE_PREALLOC (1 << 4)
1300 #define BTRFS_INODE_SYNC (1 << 5)
1301 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1302 #define BTRFS_INODE_APPEND (1 << 7)
1303 #define BTRFS_INODE_NODUMP (1 << 8)
1304 #define BTRFS_INODE_NOATIME (1 << 9)
1305 #define BTRFS_INODE_DIRSYNC (1 << 10)
1306 #define BTRFS_INODE_COMPRESS (1 << 11)
1308 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1310 /* some macros to generate set/get funcs for the struct fields. This
1311 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1314 #define le8_to_cpu(v) (v)
1315 #define cpu_to_le8(v) (v)
1318 #define read_eb_member(eb, ptr, type, member, result) ( \
1319 read_extent_buffer(eb, (char *)(result), \
1320 ((unsigned long)(ptr)) + \
1321 offsetof(type, member), \
1322 sizeof(((type *)0)->member)))
1324 #define write_eb_member(eb, ptr, type, member, result) ( \
1325 write_extent_buffer(eb, (char *)(result), \
1326 ((unsigned long)(ptr)) + \
1327 offsetof(type, member), \
1328 sizeof(((type *)0)->member)))
1330 #ifndef BTRFS_SETGET_FUNCS
1331 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1332 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1333 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1336 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1337 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1339 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1340 u##bits res = le##bits##_to_cpu(p->member); \
1341 kunmap_atomic(p, KM_USER0); \
1344 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1347 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1348 p->member = cpu_to_le##bits(val); \
1349 kunmap_atomic(p, KM_USER0); \
1352 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1353 static inline u##bits btrfs_##name(type *s) \
1355 return le##bits##_to_cpu(s->member); \
1357 static inline void btrfs_set_##name(type *s, u##bits val) \
1359 s->member = cpu_to_le##bits(val); \
1362 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1363 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1364 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1365 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1366 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1367 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1369 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1370 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1371 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1372 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1373 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1374 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1376 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1377 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1379 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1381 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1383 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1385 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1387 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1388 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1390 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1392 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1394 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1397 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1399 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1402 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1404 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1407 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1408 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1409 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1410 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1411 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1412 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1413 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1414 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1415 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1416 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1417 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1419 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1421 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1424 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1425 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1426 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1428 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1430 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1432 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1434 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1435 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1437 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1439 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1440 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1442 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1445 unsigned long offset = (unsigned long)c;
1446 offset += offsetof(struct btrfs_chunk, stripe);
1447 offset += nr * sizeof(struct btrfs_stripe);
1448 return (struct btrfs_stripe *)offset;
1451 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1453 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1456 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1457 struct btrfs_chunk *c, int nr)
1459 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1462 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1463 struct btrfs_chunk *c, int nr,
1466 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1469 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1470 struct btrfs_chunk *c, int nr)
1472 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1475 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1476 struct btrfs_chunk *c, int nr,
1479 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1482 /* struct btrfs_block_group_item */
1483 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1485 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1487 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1488 struct btrfs_block_group_item, chunk_objectid, 64);
1490 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1491 struct btrfs_block_group_item, chunk_objectid, 64);
1492 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1493 struct btrfs_block_group_item, flags, 64);
1494 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1495 struct btrfs_block_group_item, flags, 64);
1497 /* struct btrfs_inode_ref */
1498 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1499 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1501 /* struct btrfs_inode_item */
1502 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1503 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1504 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1505 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1506 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1507 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1508 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1509 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1510 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1511 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1512 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1513 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1515 static inline struct btrfs_timespec *
1516 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1518 unsigned long ptr = (unsigned long)inode_item;
1519 ptr += offsetof(struct btrfs_inode_item, atime);
1520 return (struct btrfs_timespec *)ptr;
1523 static inline struct btrfs_timespec *
1524 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1526 unsigned long ptr = (unsigned long)inode_item;
1527 ptr += offsetof(struct btrfs_inode_item, mtime);
1528 return (struct btrfs_timespec *)ptr;
1531 static inline struct btrfs_timespec *
1532 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1534 unsigned long ptr = (unsigned long)inode_item;
1535 ptr += offsetof(struct btrfs_inode_item, ctime);
1536 return (struct btrfs_timespec *)ptr;
1539 static inline struct btrfs_timespec *
1540 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1542 unsigned long ptr = (unsigned long)inode_item;
1543 ptr += offsetof(struct btrfs_inode_item, otime);
1544 return (struct btrfs_timespec *)ptr;
1547 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1548 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1550 /* struct btrfs_dev_extent */
1551 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1553 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1554 chunk_objectid, 64);
1555 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1557 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1559 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1561 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1562 return (u8 *)((unsigned long)dev + ptr);
1565 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1566 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1568 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1570 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1573 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1575 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1576 struct btrfs_tree_block_info *item,
1577 struct btrfs_disk_key *key)
1579 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1582 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1583 struct btrfs_tree_block_info *item,
1584 struct btrfs_disk_key *key)
1586 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1589 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1591 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1593 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1595 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1598 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1601 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1603 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1606 static inline u32 btrfs_extent_inline_ref_size(int type)
1608 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1609 type == BTRFS_SHARED_BLOCK_REF_KEY)
1610 return sizeof(struct btrfs_extent_inline_ref);
1611 if (type == BTRFS_SHARED_DATA_REF_KEY)
1612 return sizeof(struct btrfs_shared_data_ref) +
1613 sizeof(struct btrfs_extent_inline_ref);
1614 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1615 return sizeof(struct btrfs_extent_data_ref) +
1616 offsetof(struct btrfs_extent_inline_ref, offset);
1621 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1622 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1624 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1625 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1627 /* struct btrfs_node */
1628 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1629 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1631 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1634 ptr = offsetof(struct btrfs_node, ptrs) +
1635 sizeof(struct btrfs_key_ptr) * nr;
1636 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1639 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1643 ptr = offsetof(struct btrfs_node, ptrs) +
1644 sizeof(struct btrfs_key_ptr) * nr;
1645 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1648 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1651 ptr = offsetof(struct btrfs_node, ptrs) +
1652 sizeof(struct btrfs_key_ptr) * nr;
1653 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1656 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1660 ptr = offsetof(struct btrfs_node, ptrs) +
1661 sizeof(struct btrfs_key_ptr) * nr;
1662 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1665 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1667 return offsetof(struct btrfs_node, ptrs) +
1668 sizeof(struct btrfs_key_ptr) * nr;
1671 void btrfs_node_key(struct extent_buffer *eb,
1672 struct btrfs_disk_key *disk_key, int nr);
1674 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1675 struct btrfs_disk_key *disk_key, int nr)
1678 ptr = btrfs_node_key_ptr_offset(nr);
1679 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1680 struct btrfs_key_ptr, key, disk_key);
1683 /* struct btrfs_item */
1684 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1685 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1687 static inline unsigned long btrfs_item_nr_offset(int nr)
1689 return offsetof(struct btrfs_leaf, items) +
1690 sizeof(struct btrfs_item) * nr;
1693 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1696 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1699 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1700 struct btrfs_item *item)
1702 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1705 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1707 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1710 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1712 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1715 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1717 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1720 static inline void btrfs_item_key(struct extent_buffer *eb,
1721 struct btrfs_disk_key *disk_key, int nr)
1723 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1724 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1727 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1728 struct btrfs_disk_key *disk_key, int nr)
1730 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1731 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1734 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1737 * struct btrfs_root_ref
1739 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1740 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1741 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1743 /* struct btrfs_dir_item */
1744 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1745 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1746 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1747 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1749 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1750 struct btrfs_dir_item *item,
1751 struct btrfs_disk_key *key)
1753 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1756 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1757 struct btrfs_dir_item *item,
1758 struct btrfs_disk_key *key)
1760 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1763 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1765 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1767 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1770 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1771 struct btrfs_free_space_header *h,
1772 struct btrfs_disk_key *key)
1774 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1777 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1778 struct btrfs_free_space_header *h,
1779 struct btrfs_disk_key *key)
1781 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1784 /* struct btrfs_disk_key */
1785 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1787 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1788 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1790 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1791 struct btrfs_disk_key *disk)
1793 cpu->offset = le64_to_cpu(disk->offset);
1794 cpu->type = disk->type;
1795 cpu->objectid = le64_to_cpu(disk->objectid);
1798 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1799 struct btrfs_key *cpu)
1801 disk->offset = cpu_to_le64(cpu->offset);
1802 disk->type = cpu->type;
1803 disk->objectid = cpu_to_le64(cpu->objectid);
1806 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1807 struct btrfs_key *key, int nr)
1809 struct btrfs_disk_key disk_key;
1810 btrfs_node_key(eb, &disk_key, nr);
1811 btrfs_disk_key_to_cpu(key, &disk_key);
1814 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1815 struct btrfs_key *key, int nr)
1817 struct btrfs_disk_key disk_key;
1818 btrfs_item_key(eb, &disk_key, nr);
1819 btrfs_disk_key_to_cpu(key, &disk_key);
1822 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1823 struct btrfs_dir_item *item,
1824 struct btrfs_key *key)
1826 struct btrfs_disk_key disk_key;
1827 btrfs_dir_item_key(eb, item, &disk_key);
1828 btrfs_disk_key_to_cpu(key, &disk_key);
1832 static inline u8 btrfs_key_type(struct btrfs_key *key)
1837 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1842 /* struct btrfs_header */
1843 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1844 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1846 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1847 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1848 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1849 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1851 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1853 return (btrfs_header_flags(eb) & flag) == flag;
1856 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1858 u64 flags = btrfs_header_flags(eb);
1859 btrfs_set_header_flags(eb, flags | flag);
1860 return (flags & flag) == flag;
1863 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1865 u64 flags = btrfs_header_flags(eb);
1866 btrfs_set_header_flags(eb, flags & ~flag);
1867 return (flags & flag) == flag;
1870 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1872 u64 flags = btrfs_header_flags(eb);
1873 return flags >> BTRFS_BACKREF_REV_SHIFT;
1876 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1879 u64 flags = btrfs_header_flags(eb);
1880 flags &= ~BTRFS_BACKREF_REV_MASK;
1881 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1882 btrfs_set_header_flags(eb, flags);
1885 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1887 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1891 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1893 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1897 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1899 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1903 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1905 unsigned long ptr = offsetof(struct btrfs_header, csum);
1909 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1914 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1919 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1924 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1926 return btrfs_header_level(eb) == 0;
1929 /* struct btrfs_root_item */
1930 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1932 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1933 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1934 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1936 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1938 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1939 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1940 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1941 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1942 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1943 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1944 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1945 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1948 static inline bool btrfs_root_readonly(struct btrfs_root *root)
1950 return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
1953 /* struct btrfs_super_block */
1955 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1956 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1957 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1959 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1960 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1961 struct btrfs_super_block, sys_chunk_array_size, 32);
1962 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1963 struct btrfs_super_block, chunk_root_generation, 64);
1964 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1966 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1968 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1969 chunk_root_level, 8);
1970 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1972 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1973 log_root_transid, 64);
1974 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1976 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1978 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1980 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1982 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1984 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1986 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1988 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1989 root_dir_objectid, 64);
1990 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1992 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1994 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1995 compat_ro_flags, 64);
1996 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1997 incompat_flags, 64);
1998 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2000 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2001 cache_generation, 64);
2003 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2005 int t = btrfs_super_csum_type(s);
2006 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2007 return btrfs_csum_sizes[t];
2010 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2012 return offsetof(struct btrfs_leaf, items);
2015 /* struct btrfs_file_extent_item */
2016 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2018 static inline unsigned long
2019 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2021 unsigned long offset = (unsigned long)e;
2022 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2026 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2028 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2031 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2033 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2035 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2036 disk_num_bytes, 64);
2037 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2039 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2041 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2043 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2045 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2047 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2048 other_encoding, 16);
2050 /* this returns the number of file bytes represented by the inline item.
2051 * If an item is compressed, this is the uncompressed size
2053 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2054 struct btrfs_file_extent_item *e)
2056 return btrfs_file_extent_ram_bytes(eb, e);
2060 * this returns the number of bytes used by the item on disk, minus the
2061 * size of any extent headers. If a file is compressed on disk, this is
2062 * the compressed size
2064 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2065 struct btrfs_item *e)
2067 unsigned long offset;
2068 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2069 return btrfs_item_size(eb, e) - offset;
2072 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
2074 return sb->s_fs_info;
2077 static inline int btrfs_set_root_name(struct btrfs_root *root,
2078 const char *name, int len)
2080 /* if we already have a name just free it */
2083 root->name = kmalloc(len+1, GFP_KERNEL);
2087 memcpy(root->name, name, len);
2088 root->name[len] = '\0';
2093 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2096 return root->leafsize;
2097 return root->nodesize;
2100 /* helper function to cast into the data area of the leaf. */
2101 #define btrfs_item_ptr(leaf, slot, type) \
2102 ((type *)(btrfs_leaf_data(leaf) + \
2103 btrfs_item_offset_nr(leaf, slot)))
2105 #define btrfs_item_ptr_offset(leaf, slot) \
2106 ((unsigned long)(btrfs_leaf_data(leaf) + \
2107 btrfs_item_offset_nr(leaf, slot)))
2109 static inline struct dentry *fdentry(struct file *file)
2111 return file->f_path.dentry;
2114 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2116 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2117 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2121 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2122 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2123 struct btrfs_root *root, unsigned long count);
2124 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2125 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2126 struct btrfs_root *root, u64 bytenr,
2127 u64 num_bytes, u64 *refs, u64 *flags);
2128 int btrfs_pin_extent(struct btrfs_root *root,
2129 u64 bytenr, u64 num, int reserved);
2130 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
2131 struct btrfs_root *root, struct extent_buffer *leaf);
2132 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2133 struct btrfs_root *root,
2134 u64 objectid, u64 offset, u64 bytenr);
2135 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
2136 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2137 struct btrfs_fs_info *info,
2139 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2140 u64 btrfs_find_block_group(struct btrfs_root *root,
2141 u64 search_start, u64 search_hint, int owner);
2142 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2143 struct btrfs_root *root, u32 blocksize,
2144 u64 parent, u64 root_objectid,
2145 struct btrfs_disk_key *key, int level,
2146 u64 hint, u64 empty_size);
2147 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2148 struct btrfs_root *root,
2149 struct extent_buffer *buf,
2150 u64 parent, int last_ref);
2151 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2152 struct btrfs_root *root,
2153 u64 bytenr, u32 blocksize,
2155 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2156 struct btrfs_root *root,
2157 u64 root_objectid, u64 owner,
2158 u64 offset, struct btrfs_key *ins);
2159 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2160 struct btrfs_root *root,
2161 u64 root_objectid, u64 owner, u64 offset,
2162 struct btrfs_key *ins);
2163 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2164 struct btrfs_root *root,
2165 u64 num_bytes, u64 min_alloc_size,
2166 u64 empty_size, u64 hint_byte,
2167 u64 search_end, struct btrfs_key *ins,
2169 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2170 struct extent_buffer *buf, int full_backref);
2171 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2172 struct extent_buffer *buf, int full_backref);
2173 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2174 struct btrfs_root *root,
2175 u64 bytenr, u64 num_bytes, u64 flags,
2177 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2178 struct btrfs_root *root,
2179 u64 bytenr, u64 num_bytes, u64 parent,
2180 u64 root_objectid, u64 owner, u64 offset);
2182 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2183 int btrfs_update_reserved_bytes(struct btrfs_block_group_cache *cache,
2184 u64 num_bytes, int reserve, int sinfo);
2185 int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2186 struct btrfs_root *root);
2187 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2188 struct btrfs_root *root);
2189 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2190 struct btrfs_root *root,
2191 u64 bytenr, u64 num_bytes, u64 parent,
2192 u64 root_objectid, u64 owner, u64 offset);
2194 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2195 struct btrfs_root *root);
2196 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2197 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2198 int btrfs_read_block_groups(struct btrfs_root *root);
2199 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2200 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2201 struct btrfs_root *root, u64 bytes_used,
2202 u64 type, u64 chunk_objectid, u64 chunk_offset,
2204 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2205 struct btrfs_root *root, u64 group_start);
2206 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2207 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2208 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2209 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2210 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2211 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2212 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
2213 struct btrfs_root *root,
2215 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2216 struct btrfs_root *root);
2217 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2218 struct inode *inode);
2219 void btrfs_orphan_release_metadata(struct inode *inode);
2220 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2221 struct btrfs_pending_snapshot *pending);
2222 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2223 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2224 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2225 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2226 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2227 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2228 void btrfs_free_block_rsv(struct btrfs_root *root,
2229 struct btrfs_block_rsv *rsv);
2230 void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
2231 struct btrfs_block_rsv *rsv);
2232 int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
2233 struct btrfs_root *root,
2234 struct btrfs_block_rsv *block_rsv,
2236 int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
2237 struct btrfs_root *root,
2238 struct btrfs_block_rsv *block_rsv,
2239 u64 min_reserved, int min_factor);
2240 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2241 struct btrfs_block_rsv *dst_rsv,
2243 void btrfs_block_rsv_release(struct btrfs_root *root,
2244 struct btrfs_block_rsv *block_rsv,
2246 int btrfs_set_block_group_ro(struct btrfs_root *root,
2247 struct btrfs_block_group_cache *cache);
2248 int btrfs_set_block_group_rw(struct btrfs_root *root,
2249 struct btrfs_block_group_cache *cache);
2250 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2251 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2252 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2253 u64 start, u64 end);
2254 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2255 u64 num_bytes, u64 *actual_bytes);
2256 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2257 struct btrfs_root *root, u64 type);
2258 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2260 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2262 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2263 int level, int *slot);
2264 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2265 int btrfs_previous_item(struct btrfs_root *root,
2266 struct btrfs_path *path, u64 min_objectid,
2268 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2269 struct btrfs_root *root, struct btrfs_path *path,
2270 struct btrfs_key *new_key);
2271 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2272 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2273 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2274 struct btrfs_key *key, int lowest_level,
2275 int cache_only, u64 min_trans);
2276 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2277 struct btrfs_key *max_key,
2278 struct btrfs_path *path, int cache_only,
2280 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2281 struct btrfs_root *root, struct extent_buffer *buf,
2282 struct extent_buffer *parent, int parent_slot,
2283 struct extent_buffer **cow_ret);
2284 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2285 struct btrfs_root *root,
2286 struct extent_buffer *buf,
2287 struct extent_buffer **cow_ret, u64 new_root_objectid);
2288 int btrfs_block_can_be_shared(struct btrfs_root *root,
2289 struct extent_buffer *buf);
2290 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2291 *root, struct btrfs_path *path, u32 data_size);
2292 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2293 struct btrfs_root *root,
2294 struct btrfs_path *path,
2295 u32 new_size, int from_end);
2296 int btrfs_split_item(struct btrfs_trans_handle *trans,
2297 struct btrfs_root *root,
2298 struct btrfs_path *path,
2299 struct btrfs_key *new_key,
2300 unsigned long split_offset);
2301 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2302 struct btrfs_root *root,
2303 struct btrfs_path *path,
2304 struct btrfs_key *new_key);
2305 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2306 *root, struct btrfs_key *key, struct btrfs_path *p, int
2308 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2309 struct btrfs_root *root, struct extent_buffer *parent,
2310 int start_slot, int cache_only, u64 *last_ret,
2311 struct btrfs_key *progress);
2312 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
2313 struct btrfs_path *btrfs_alloc_path(void);
2314 void btrfs_free_path(struct btrfs_path *p);
2315 void btrfs_set_path_blocking(struct btrfs_path *p);
2316 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2318 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2319 struct btrfs_path *path, int slot, int nr);
2320 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2321 struct btrfs_root *root,
2322 struct btrfs_path *path)
2324 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2327 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2328 *root, struct btrfs_key *key, void *data, u32 data_size);
2329 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
2330 struct btrfs_root *root,
2331 struct btrfs_path *path,
2332 struct btrfs_key *cpu_key, u32 *data_size,
2334 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2335 struct btrfs_root *root,
2336 struct btrfs_path *path,
2337 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2339 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2340 struct btrfs_root *root,
2341 struct btrfs_path *path,
2342 struct btrfs_key *key,
2345 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2348 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2349 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2350 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2351 int btrfs_drop_snapshot(struct btrfs_root *root,
2352 struct btrfs_block_rsv *block_rsv, int update_ref);
2353 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2354 struct btrfs_root *root,
2355 struct extent_buffer *node,
2356 struct extent_buffer *parent);
2358 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2359 struct btrfs_path *path,
2360 u64 root_id, u64 ref_id);
2361 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2362 struct btrfs_root *tree_root,
2363 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2364 const char *name, int name_len);
2365 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2366 struct btrfs_root *tree_root,
2367 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2368 const char *name, int name_len);
2369 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2370 struct btrfs_key *key);
2371 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2372 *root, struct btrfs_key *key, struct btrfs_root_item
2374 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2375 *root, struct btrfs_key *key, struct btrfs_root_item
2377 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2378 btrfs_root_item *item, struct btrfs_key *key);
2379 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
2380 u64 *found_objectid);
2381 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2382 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2383 int btrfs_set_root_node(struct btrfs_root_item *item,
2384 struct extent_buffer *node);
2385 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2388 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2389 struct btrfs_root *root, const char *name,
2390 int name_len, u64 dir,
2391 struct btrfs_key *location, u8 type, u64 index);
2392 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2393 struct btrfs_root *root,
2394 struct btrfs_path *path, u64 dir,
2395 const char *name, int name_len,
2397 struct btrfs_dir_item *
2398 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2399 struct btrfs_root *root,
2400 struct btrfs_path *path, u64 dir,
2401 u64 objectid, const char *name, int name_len,
2403 struct btrfs_dir_item *
2404 btrfs_search_dir_index_item(struct btrfs_root *root,
2405 struct btrfs_path *path, u64 dirid,
2406 const char *name, int name_len);
2407 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2408 struct btrfs_path *path,
2409 const char *name, int name_len);
2410 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2411 struct btrfs_root *root,
2412 struct btrfs_path *path,
2413 struct btrfs_dir_item *di);
2414 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2415 struct btrfs_root *root,
2416 struct btrfs_path *path, u64 objectid,
2417 const char *name, u16 name_len,
2418 const void *data, u16 data_len);
2419 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2420 struct btrfs_root *root,
2421 struct btrfs_path *path, u64 dir,
2422 const char *name, u16 name_len,
2424 int verify_dir_item(struct btrfs_root *root,
2425 struct extent_buffer *leaf,
2426 struct btrfs_dir_item *dir_item);
2429 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2430 struct btrfs_root *root, u64 offset);
2431 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2432 struct btrfs_root *root, u64 offset);
2433 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2436 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2437 struct btrfs_root *fs_root,
2438 u64 dirid, u64 *objectid);
2439 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2442 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2443 struct btrfs_root *root,
2444 const char *name, int name_len,
2445 u64 inode_objectid, u64 ref_objectid, u64 index);
2446 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2447 struct btrfs_root *root,
2448 const char *name, int name_len,
2449 u64 inode_objectid, u64 ref_objectid, u64 *index);
2450 struct btrfs_inode_ref *
2451 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2452 struct btrfs_root *root,
2453 struct btrfs_path *path,
2454 const char *name, int name_len,
2455 u64 inode_objectid, u64 ref_objectid, int mod);
2456 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2457 struct btrfs_root *root,
2458 struct btrfs_path *path, u64 objectid);
2459 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2460 *root, struct btrfs_path *path,
2461 struct btrfs_key *location, int mod);
2464 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2465 struct btrfs_root *root, u64 bytenr, u64 len);
2466 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2467 struct bio *bio, u32 *dst);
2468 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2469 struct bio *bio, u64 logical_offset, u32 *dst);
2470 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2471 struct btrfs_root *root,
2472 u64 objectid, u64 pos,
2473 u64 disk_offset, u64 disk_num_bytes,
2474 u64 num_bytes, u64 offset, u64 ram_bytes,
2475 u8 compression, u8 encryption, u16 other_encoding);
2476 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2477 struct btrfs_root *root,
2478 struct btrfs_path *path, u64 objectid,
2479 u64 bytenr, int mod);
2480 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2481 struct btrfs_root *root,
2482 struct btrfs_ordered_sum *sums);
2483 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2484 struct bio *bio, u64 file_start, int contig);
2485 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2486 u64 start, unsigned long len);
2487 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2488 struct btrfs_root *root,
2489 struct btrfs_path *path,
2490 u64 bytenr, int cow);
2491 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2492 struct btrfs_root *root, struct btrfs_path *path,
2494 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2495 struct list_head *list, int search_commit);
2498 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2499 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2500 #define ClearPageChecked ClearPageFsMisc
2501 #define SetPageChecked SetPageFsMisc
2502 #define PageChecked PageFsMisc
2505 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2506 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2507 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2508 struct btrfs_root *root,
2509 struct inode *dir, struct inode *inode,
2510 const char *name, int name_len);
2511 int btrfs_add_link(struct btrfs_trans_handle *trans,
2512 struct inode *parent_inode, struct inode *inode,
2513 const char *name, int name_len, int add_backref, u64 index);
2514 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2515 struct btrfs_root *root,
2516 struct inode *dir, u64 objectid,
2517 const char *name, int name_len);
2518 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2519 struct btrfs_root *root,
2520 struct inode *inode, u64 new_size,
2523 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2524 int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput,
2526 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2527 struct extent_state **cached_state);
2528 int btrfs_writepages(struct address_space *mapping,
2529 struct writeback_control *wbc);
2530 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2531 struct btrfs_root *new_root,
2532 u64 new_dirid, u64 alloc_hint);
2533 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2534 size_t size, struct bio *bio, unsigned long bio_flags);
2536 unsigned long btrfs_force_ra(struct address_space *mapping,
2537 struct file_ra_state *ra, struct file *file,
2538 pgoff_t offset, pgoff_t last_index);
2539 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2540 int btrfs_readpage(struct file *file, struct page *page);
2541 void btrfs_evict_inode(struct inode *inode);
2542 void btrfs_put_inode(struct inode *inode);
2543 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2544 void btrfs_dirty_inode(struct inode *inode);
2545 struct inode *btrfs_alloc_inode(struct super_block *sb);
2546 void btrfs_destroy_inode(struct inode *inode);
2547 int btrfs_drop_inode(struct inode *inode);
2548 int btrfs_init_cachep(void);
2549 void btrfs_destroy_cachep(void);
2550 long btrfs_ioctl_trans_end(struct file *file);
2551 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2552 struct btrfs_root *root, int *was_new);
2553 int btrfs_commit_write(struct file *file, struct page *page,
2554 unsigned from, unsigned to);
2555 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2556 size_t page_offset, u64 start, u64 end,
2558 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2559 struct btrfs_root *root,
2560 struct inode *inode);
2561 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2562 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2563 int btrfs_orphan_cleanup(struct btrfs_root *root);
2564 void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle *trans,
2565 struct btrfs_pending_snapshot *pending,
2566 u64 *bytes_to_reserve);
2567 void btrfs_orphan_post_snapshot(struct btrfs_trans_handle *trans,
2568 struct btrfs_pending_snapshot *pending);
2569 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2570 struct btrfs_root *root);
2571 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2572 int btrfs_invalidate_inodes(struct btrfs_root *root);
2573 void btrfs_add_delayed_iput(struct inode *inode);
2574 void btrfs_run_delayed_iputs(struct btrfs_root *root);
2575 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2576 u64 start, u64 num_bytes, u64 min_size,
2577 loff_t actual_len, u64 *alloc_hint);
2578 int btrfs_prealloc_file_range_trans(struct inode *inode,
2579 struct btrfs_trans_handle *trans, int mode,
2580 u64 start, u64 num_bytes, u64 min_size,
2581 loff_t actual_len, u64 *alloc_hint);
2582 extern const struct dentry_operations btrfs_dentry_operations;
2585 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2586 void btrfs_update_iflags(struct inode *inode);
2587 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
2590 int btrfs_sync_file(struct file *file, int datasync);
2591 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2593 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2594 extern const struct file_operations btrfs_file_operations;
2595 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2596 u64 start, u64 end, u64 *hint_byte, int drop_cache);
2597 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2598 struct inode *inode, u64 start, u64 end);
2599 int btrfs_release_file(struct inode *inode, struct file *file);
2600 void btrfs_drop_pages(struct page **pages, size_t num_pages);
2601 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
2602 struct page **pages, size_t num_pages,
2603 loff_t pos, size_t write_bytes,
2604 struct extent_state **cached);
2607 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2608 struct btrfs_root *root, int cache_only);
2611 int btrfs_init_sysfs(void);
2612 void btrfs_exit_sysfs(void);
2613 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2614 int btrfs_sysfs_add_root(struct btrfs_root *root);
2615 void btrfs_sysfs_del_root(struct btrfs_root *root);
2616 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2619 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2622 int btrfs_parse_options(struct btrfs_root *root, char *options);
2623 int btrfs_sync_fs(struct super_block *sb, int wait);
2624 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
2625 unsigned int line, int errno);
2627 #define btrfs_std_error(fs_info, errno) \
2630 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2634 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2635 int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags);
2637 #define btrfs_check_acl NULL
2639 int btrfs_init_acl(struct btrfs_trans_handle *trans,
2640 struct inode *inode, struct inode *dir);
2641 int btrfs_acl_chmod(struct inode *inode);
2644 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2645 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2646 struct btrfs_root *root);
2647 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2648 struct btrfs_root *root);
2649 int btrfs_recover_relocation(struct btrfs_root *root);
2650 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
2651 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
2652 struct btrfs_root *root, struct extent_buffer *buf,
2653 struct extent_buffer *cow);
2654 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
2655 struct btrfs_pending_snapshot *pending,
2656 u64 *bytes_to_reserve);
2657 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
2658 struct btrfs_pending_snapshot *pending);
2661 int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
2662 struct btrfs_scrub_progress *progress);
2663 int btrfs_scrub_pause(struct btrfs_root *root);
2664 int btrfs_scrub_pause_super(struct btrfs_root *root);
2665 int btrfs_scrub_continue(struct btrfs_root *root);
2666 int btrfs_scrub_continue_super(struct btrfs_root *root);
2667 int btrfs_scrub_cancel(struct btrfs_root *root);
2668 int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
2669 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
2670 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
2671 struct btrfs_scrub_progress *progress);