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
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 * the super block basically lists the main trees of the FS
365 * it currently lacks any block count etc etc
367 struct btrfs_super_block {
368 u8 csum[BTRFS_CSUM_SIZE];
369 /* the first 4 fields must match struct btrfs_header */
370 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
371 __le64 bytenr; /* this block number */
374 /* allowed to be different from the btrfs_header from here own down */
381 /* this will help find the new super based on the log root */
382 __le64 log_root_transid;
385 __le64 root_dir_objectid;
391 __le32 sys_chunk_array_size;
392 __le64 chunk_root_generation;
394 __le64 compat_ro_flags;
395 __le64 incompat_flags;
400 struct btrfs_dev_item dev_item;
402 char label[BTRFS_LABEL_SIZE];
404 __le64 cache_generation;
406 /* future expansion */
408 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
409 } __attribute__ ((__packed__));
412 * Compat flags that we support. If any incompat flags are set other than the
413 * ones specified below then we will fail to mount
415 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
416 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
417 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
418 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
420 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
421 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
422 #define BTRFS_FEATURE_INCOMPAT_SUPP \
423 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
424 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
425 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
426 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
429 * A leaf is full of items. offset and size tell us where to find
430 * the item in the leaf (relative to the start of the data area)
433 struct btrfs_disk_key key;
436 } __attribute__ ((__packed__));
439 * leaves have an item area and a data area:
440 * [item0, item1....itemN] [free space] [dataN...data1, data0]
442 * The data is separate from the items to get the keys closer together
446 struct btrfs_header header;
447 struct btrfs_item items[];
448 } __attribute__ ((__packed__));
451 * all non-leaf blocks are nodes, they hold only keys and pointers to
454 struct btrfs_key_ptr {
455 struct btrfs_disk_key key;
458 } __attribute__ ((__packed__));
461 struct btrfs_header header;
462 struct btrfs_key_ptr ptrs[];
463 } __attribute__ ((__packed__));
466 * btrfs_paths remember the path taken from the root down to the leaf.
467 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
468 * to any other levels that are present.
470 * The slots array records the index of the item or block pointer
471 * used while walking the tree.
474 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
475 int slots[BTRFS_MAX_LEVEL];
476 /* if there is real range locking, this locks field will change */
477 int locks[BTRFS_MAX_LEVEL];
479 /* keep some upper locks as we walk down */
483 * set by btrfs_split_item, tells search_slot to keep all locks
484 * and to force calls to keep space in the nodes
486 unsigned int search_for_split:1;
487 unsigned int keep_locks:1;
488 unsigned int skip_locking:1;
489 unsigned int leave_spinning:1;
490 unsigned int search_commit_root:1;
494 * items in the extent btree are used to record the objectid of the
495 * owner of the block and the number of references
498 struct btrfs_extent_item {
502 } __attribute__ ((__packed__));
504 struct btrfs_extent_item_v0 {
506 } __attribute__ ((__packed__));
508 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
509 sizeof(struct btrfs_item))
511 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
512 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
514 /* following flags only apply to tree blocks */
516 /* use full backrefs for extent pointers in the block */
517 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
520 * this flag is only used internally by scrub and may be changed at any time
521 * it is only declared here to avoid collisions
523 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
525 struct btrfs_tree_block_info {
526 struct btrfs_disk_key key;
528 } __attribute__ ((__packed__));
530 struct btrfs_extent_data_ref {
535 } __attribute__ ((__packed__));
537 struct btrfs_shared_data_ref {
539 } __attribute__ ((__packed__));
541 struct btrfs_extent_inline_ref {
544 } __attribute__ ((__packed__));
546 /* old style backrefs item */
547 struct btrfs_extent_ref_v0 {
552 } __attribute__ ((__packed__));
555 /* dev extents record free space on individual devices. The owner
556 * field points back to the chunk allocation mapping tree that allocated
557 * the extent. The chunk tree uuid field is a way to double check the owner
559 struct btrfs_dev_extent {
561 __le64 chunk_objectid;
564 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
565 } __attribute__ ((__packed__));
567 struct btrfs_inode_ref {
571 } __attribute__ ((__packed__));
573 struct btrfs_timespec {
576 } __attribute__ ((__packed__));
578 enum btrfs_compression_type {
579 BTRFS_COMPRESS_NONE = 0,
580 BTRFS_COMPRESS_ZLIB = 1,
581 BTRFS_COMPRESS_LZO = 2,
582 BTRFS_COMPRESS_TYPES = 2,
583 BTRFS_COMPRESS_LAST = 3,
586 struct btrfs_inode_item {
587 /* nfs style generation number */
589 /* transid that last touched this inode */
601 /* modification sequence number for NFS */
605 * a little future expansion, for more than this we can
606 * just grow the inode item and version it
609 struct btrfs_timespec atime;
610 struct btrfs_timespec ctime;
611 struct btrfs_timespec mtime;
612 struct btrfs_timespec otime;
613 } __attribute__ ((__packed__));
615 struct btrfs_dir_log_item {
617 } __attribute__ ((__packed__));
619 struct btrfs_dir_item {
620 struct btrfs_disk_key location;
625 } __attribute__ ((__packed__));
627 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
629 struct btrfs_root_item {
630 struct btrfs_inode_item inode;
636 __le64 last_snapshot;
639 struct btrfs_disk_key drop_progress;
642 } __attribute__ ((__packed__));
645 * this is used for both forward and backward root refs
647 struct btrfs_root_ref {
651 } __attribute__ ((__packed__));
653 #define BTRFS_FILE_EXTENT_INLINE 0
654 #define BTRFS_FILE_EXTENT_REG 1
655 #define BTRFS_FILE_EXTENT_PREALLOC 2
657 struct btrfs_file_extent_item {
659 * transaction id that created this extent
663 * max number of bytes to hold this extent in ram
664 * when we split a compressed extent we can't know how big
665 * each of the resulting pieces will be. So, this is
666 * an upper limit on the size of the extent in ram instead of
672 * 32 bits for the various ways we might encode the data,
673 * including compression and encryption. If any of these
674 * are set to something a given disk format doesn't understand
675 * it is treated like an incompat flag for reading and writing,
680 __le16 other_encoding; /* spare for later use */
682 /* are we inline data or a real extent? */
686 * disk space consumed by the extent, checksum blocks are included
690 __le64 disk_num_bytes;
692 * the logical offset in file blocks (no csums)
693 * this extent record is for. This allows a file extent to point
694 * into the middle of an existing extent on disk, sharing it
695 * between two snapshots (useful if some bytes in the middle of the
696 * extent have changed
700 * the logical number of file blocks (no csums included). This
701 * always reflects the size uncompressed and without encoding.
705 } __attribute__ ((__packed__));
707 struct btrfs_csum_item {
709 } __attribute__ ((__packed__));
711 /* different types of block groups (and chunks) */
712 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
713 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
714 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
715 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
716 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
717 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
718 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
719 #define BTRFS_NR_RAID_TYPES 5
721 struct btrfs_block_group_item {
723 __le64 chunk_objectid;
725 } __attribute__ ((__packed__));
727 struct btrfs_space_info {
730 u64 total_bytes; /* total bytes in the space,
731 this doesn't take mirrors into account */
732 u64 bytes_used; /* total bytes used,
733 this doesn't take mirrors into account */
734 u64 bytes_pinned; /* total bytes pinned, will be freed when the
735 transaction finishes */
736 u64 bytes_reserved; /* total bytes the allocator has reserved for
737 current allocations */
738 u64 bytes_readonly; /* total bytes that are read only */
740 u64 bytes_may_use; /* number of bytes that may be used for
741 delalloc/allocations */
742 u64 disk_used; /* total bytes used on disk */
743 u64 disk_total; /* total bytes on disk, takes mirrors into
747 * we bump reservation progress every time we decrement
748 * bytes_reserved. This way people waiting for reservations
749 * know something good has happened and they can check
750 * for progress. The number here isn't to be trusted, it
751 * just shows reclaim activity
753 unsigned long reservation_progress;
755 unsigned int full:1; /* indicates that we cannot allocate any more
756 chunks for this space */
757 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
759 unsigned int force_alloc; /* set if we need to force a chunk
760 alloc for this space */
762 struct list_head list;
764 /* for block groups in our same type */
765 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
767 struct rw_semaphore groups_sem;
768 atomic_t caching_threads;
771 struct btrfs_block_rsv {
775 struct btrfs_space_info *space_info;
776 struct list_head list;
779 unsigned int priority:8;
780 unsigned int durable:1;
781 unsigned int refill_used:1;
786 * free clusters are used to claim free space in relatively large chunks,
787 * allowing us to do less seeky writes. They are used for all metadata
788 * allocations and data allocations in ssd mode.
790 struct btrfs_free_cluster {
792 spinlock_t refill_lock;
795 /* largest extent in this cluster */
798 /* first extent starting offset */
801 struct btrfs_block_group_cache *block_group;
803 * when a cluster is allocated from a block group, we put the
804 * cluster onto a list in the block group so that it can
805 * be freed before the block group is freed.
807 struct list_head block_group_list;
810 enum btrfs_caching_type {
812 BTRFS_CACHE_STARTED = 1,
813 BTRFS_CACHE_FINISHED = 2,
816 enum btrfs_disk_cache_state {
817 BTRFS_DC_WRITTEN = 0,
821 BTRFS_DC_NEED_WRITE = 4,
824 struct btrfs_caching_control {
825 struct list_head list;
827 wait_queue_head_t wait;
828 struct btrfs_block_group_cache *block_group;
833 struct btrfs_block_group_cache {
834 struct btrfs_key key;
835 struct btrfs_block_group_item item;
836 struct btrfs_fs_info *fs_info;
846 unsigned int dirty:1;
849 int disk_cache_state;
851 /* cache tracking stuff */
853 struct btrfs_caching_control *caching_ctl;
854 u64 last_byte_to_unpin;
856 struct btrfs_space_info *space_info;
858 /* free space cache stuff */
859 struct btrfs_free_space_ctl *free_space_ctl;
861 /* block group cache stuff */
862 struct rb_node cache_node;
864 /* for block groups in the same raid type */
865 struct list_head list;
870 /* List of struct btrfs_free_clusters for this block group.
871 * Today it will only have one thing on it, but that may change
873 struct list_head cluster_list;
876 struct reloc_control;
878 struct btrfs_fs_devices;
879 struct btrfs_delayed_root;
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;
907 * block reservation for extent, checksum, root tree and
908 * delayed dir index item
910 struct btrfs_block_rsv global_block_rsv;
911 /* block reservation for delay allocation */
912 struct btrfs_block_rsv delalloc_block_rsv;
913 /* block reservation for metadata operations */
914 struct btrfs_block_rsv trans_block_rsv;
915 /* block reservation for chunk tree */
916 struct btrfs_block_rsv chunk_block_rsv;
918 struct btrfs_block_rsv empty_block_rsv;
920 /* list of block reservations that cross multiple transactions */
921 struct list_head durable_block_rsv_list;
923 struct mutex durable_block_rsv_mutex;
926 u64 last_trans_committed;
929 * this is updated to the current trans every time a full commit
930 * is required instead of the faster short fsync log commits
932 u64 last_trans_log_full_commit;
933 unsigned long mount_opt:20;
934 unsigned long compress_type:4;
937 struct btrfs_transaction *running_transaction;
938 wait_queue_head_t transaction_throttle;
939 wait_queue_head_t transaction_wait;
940 wait_queue_head_t transaction_blocked_wait;
941 wait_queue_head_t async_submit_wait;
943 struct btrfs_super_block super_copy;
944 struct btrfs_super_block super_for_commit;
945 struct block_device *__bdev;
946 struct super_block *sb;
947 struct inode *btree_inode;
948 struct backing_dev_info bdi;
949 struct mutex tree_log_mutex;
950 struct mutex transaction_kthread_mutex;
951 struct mutex cleaner_mutex;
952 struct mutex chunk_mutex;
953 struct mutex volume_mutex;
955 * this protects the ordered operations list only while we are
956 * processing all of the entries on it. This way we make
957 * sure the commit code doesn't find the list temporarily empty
958 * because another function happens to be doing non-waiting preflush
959 * before jumping into the main commit.
961 struct mutex ordered_operations_mutex;
962 struct rw_semaphore extent_commit_sem;
964 struct rw_semaphore cleanup_work_sem;
966 struct rw_semaphore subvol_sem;
967 struct srcu_struct subvol_srcu;
969 spinlock_t trans_lock;
971 * the reloc mutex goes with the trans lock, it is taken
972 * during commit to protect us from the relocation code
974 struct mutex reloc_mutex;
976 struct list_head trans_list;
977 struct list_head hashers;
978 struct list_head dead_roots;
979 struct list_head caching_block_groups;
981 spinlock_t delayed_iput_lock;
982 struct list_head delayed_iputs;
984 atomic_t nr_async_submits;
985 atomic_t async_submit_draining;
986 atomic_t nr_async_bios;
987 atomic_t async_delalloc_pages;
988 atomic_t open_ioctl_trans;
991 * this is used by the balancing code to wait for all the pending
994 spinlock_t ordered_extent_lock;
997 * all of the data=ordered extents pending writeback
998 * these can span multiple transactions and basically include
999 * every dirty data page that isn't from nodatacow
1001 struct list_head ordered_extents;
1004 * all of the inodes that have delalloc bytes. It is possible for
1005 * this list to be empty even when there is still dirty data=ordered
1006 * extents waiting to finish IO.
1008 struct list_head delalloc_inodes;
1011 * special rename and truncate targets that must be on disk before
1012 * we're allowed to commit. This is basically the ext3 style
1013 * data=ordered list.
1015 struct list_head ordered_operations;
1018 * there is a pool of worker threads for checksumming during writes
1019 * and a pool for checksumming after reads. This is because readers
1020 * can run with FS locks held, and the writers may be waiting for
1021 * those locks. We don't want ordering in the pending list to cause
1022 * deadlocks, and so the two are serviced separately.
1024 * A third pool does submit_bio to avoid deadlocking with the other
1027 struct btrfs_workers generic_worker;
1028 struct btrfs_workers workers;
1029 struct btrfs_workers delalloc_workers;
1030 struct btrfs_workers endio_workers;
1031 struct btrfs_workers endio_meta_workers;
1032 struct btrfs_workers endio_meta_write_workers;
1033 struct btrfs_workers endio_write_workers;
1034 struct btrfs_workers endio_freespace_worker;
1035 struct btrfs_workers submit_workers;
1037 * fixup workers take dirty pages that didn't properly go through
1038 * the cow mechanism and make them safe to write. It happens
1039 * for the sys_munmap function call path
1041 struct btrfs_workers fixup_workers;
1042 struct btrfs_workers delayed_workers;
1043 struct task_struct *transaction_kthread;
1044 struct task_struct *cleaner_kthread;
1045 int thread_pool_size;
1047 struct kobject super_kobj;
1048 struct completion kobj_unregister;
1051 int log_root_recovering;
1057 /* protected by the delalloc lock, used to keep from writing
1058 * metadata until there is a nice batch
1060 u64 dirty_metadata_bytes;
1061 struct list_head dirty_cowonly_roots;
1063 struct btrfs_fs_devices *fs_devices;
1066 * the space_info list is almost entirely read only. It only changes
1067 * when we add a new raid type to the FS, and that happens
1068 * very rarely. RCU is used to protect it.
1070 struct list_head space_info;
1072 struct reloc_control *reloc_ctl;
1074 spinlock_t delalloc_lock;
1077 /* data_alloc_cluster is only used in ssd mode */
1078 struct btrfs_free_cluster data_alloc_cluster;
1080 /* all metadata allocations go through this cluster */
1081 struct btrfs_free_cluster meta_alloc_cluster;
1083 /* auto defrag inodes go here */
1084 spinlock_t defrag_inodes_lock;
1085 struct rb_root defrag_inodes;
1086 atomic_t defrag_running;
1088 spinlock_t ref_cache_lock;
1089 u64 total_ref_cache_size;
1091 u64 avail_data_alloc_bits;
1092 u64 avail_metadata_alloc_bits;
1093 u64 avail_system_alloc_bits;
1094 u64 data_alloc_profile;
1095 u64 metadata_alloc_profile;
1096 u64 system_alloc_profile;
1098 unsigned data_chunk_allocations;
1099 unsigned metadata_ratio;
1103 /* private scrub information */
1104 struct mutex scrub_lock;
1105 atomic_t scrubs_running;
1106 atomic_t scrub_pause_req;
1107 atomic_t scrubs_paused;
1108 atomic_t scrub_cancel_req;
1109 wait_queue_head_t scrub_pause_wait;
1110 struct rw_semaphore scrub_super_lock;
1111 int scrub_workers_refcnt;
1112 struct btrfs_workers scrub_workers;
1114 /* filesystem state */
1117 struct btrfs_delayed_root *delayed_root;
1121 * in ram representation of the tree. extent_root is used for all allocations
1122 * and for the extent tree extent_root root.
1125 struct extent_buffer *node;
1127 struct extent_buffer *commit_root;
1128 struct btrfs_root *log_root;
1129 struct btrfs_root *reloc_root;
1131 struct btrfs_root_item root_item;
1132 struct btrfs_key root_key;
1133 struct btrfs_fs_info *fs_info;
1134 struct extent_io_tree dirty_log_pages;
1136 struct kobject root_kobj;
1137 struct completion kobj_unregister;
1138 struct mutex objectid_mutex;
1140 spinlock_t accounting_lock;
1141 struct btrfs_block_rsv *block_rsv;
1143 /* free ino cache stuff */
1144 struct mutex fs_commit_mutex;
1145 struct btrfs_free_space_ctl *free_ino_ctl;
1146 enum btrfs_caching_type cached;
1147 spinlock_t cache_lock;
1148 wait_queue_head_t cache_wait;
1149 struct btrfs_free_space_ctl *free_ino_pinned;
1151 struct inode *cache_inode;
1153 struct mutex log_mutex;
1154 wait_queue_head_t log_writer_wait;
1155 wait_queue_head_t log_commit_wait[2];
1156 atomic_t log_writers;
1157 atomic_t log_commit[2];
1158 unsigned long log_transid;
1159 unsigned long last_log_commit;
1160 unsigned long log_batch;
1161 pid_t log_start_pid;
1162 bool log_multiple_pids;
1167 /* data allocations are done in sectorsize units */
1170 /* node allocations are done in nodesize units */
1173 /* leaf allocations are done in leafsize units */
1180 u64 highest_objectid;
1182 /* btrfs_record_root_in_trans is a multi-step process,
1183 * and it can race with the balancing code. But the
1184 * race is very small, and only the first time the root
1185 * is added to each transaction. So in_trans_setup
1186 * is used to tell us when more checks are required
1188 unsigned long in_trans_setup;
1193 u64 defrag_trans_start;
1194 struct btrfs_key defrag_progress;
1195 struct btrfs_key defrag_max;
1199 /* the dirty list is only used by non-reference counted roots */
1200 struct list_head dirty_list;
1202 struct list_head root_list;
1204 spinlock_t orphan_lock;
1205 struct list_head orphan_list;
1206 struct btrfs_block_rsv *orphan_block_rsv;
1207 int orphan_item_inserted;
1208 int orphan_cleanup_state;
1210 spinlock_t inode_lock;
1211 /* red-black tree that keeps track of in-memory inodes */
1212 struct rb_root inode_tree;
1215 * radix tree that keeps track of delayed nodes of every inode,
1216 * protected by inode_lock
1218 struct radix_tree_root delayed_nodes_tree;
1220 * right now this just gets used so that a root has its own devid
1221 * for stat. It may be used for more later
1223 struct super_block anon_super;
1226 struct btrfs_ioctl_defrag_range_args {
1227 /* start of the defrag operation */
1230 /* number of bytes to defrag, use (u64)-1 to say all */
1234 * flags for the operation, which can include turning
1235 * on compression for this one defrag
1240 * any extent bigger than this will be considered
1241 * already defragged. Use 0 to take the kernel default
1242 * Use 1 to say every single extent must be rewritten
1244 __u32 extent_thresh;
1247 * which compression method to use if turning on compression
1248 * for this defrag operation. If unspecified, zlib will
1251 __u32 compress_type;
1253 /* spare for later */
1259 * inode items have the data typically returned from stat and store other
1260 * info about object characteristics. There is one for every file and dir in
1263 #define BTRFS_INODE_ITEM_KEY 1
1264 #define BTRFS_INODE_REF_KEY 12
1265 #define BTRFS_XATTR_ITEM_KEY 24
1266 #define BTRFS_ORPHAN_ITEM_KEY 48
1267 /* reserve 2-15 close to the inode for later flexibility */
1270 * dir items are the name -> inode pointers in a directory. There is one
1271 * for every name in a directory.
1273 #define BTRFS_DIR_LOG_ITEM_KEY 60
1274 #define BTRFS_DIR_LOG_INDEX_KEY 72
1275 #define BTRFS_DIR_ITEM_KEY 84
1276 #define BTRFS_DIR_INDEX_KEY 96
1278 * extent data is for file data
1280 #define BTRFS_EXTENT_DATA_KEY 108
1283 * extent csums are stored in a separate tree and hold csums for
1284 * an entire extent on disk.
1286 #define BTRFS_EXTENT_CSUM_KEY 128
1289 * root items point to tree roots. They are typically in the root
1290 * tree used by the super block to find all the other trees
1292 #define BTRFS_ROOT_ITEM_KEY 132
1295 * root backrefs tie subvols and snapshots to the directory entries that
1298 #define BTRFS_ROOT_BACKREF_KEY 144
1301 * root refs make a fast index for listing all of the snapshots and
1302 * subvolumes referenced by a given root. They point directly to the
1303 * directory item in the root that references the subvol
1305 #define BTRFS_ROOT_REF_KEY 156
1308 * extent items are in the extent map tree. These record which blocks
1309 * are used, and how many references there are to each block
1311 #define BTRFS_EXTENT_ITEM_KEY 168
1313 #define BTRFS_TREE_BLOCK_REF_KEY 176
1315 #define BTRFS_EXTENT_DATA_REF_KEY 178
1317 #define BTRFS_EXTENT_REF_V0_KEY 180
1319 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1321 #define BTRFS_SHARED_DATA_REF_KEY 184
1324 * block groups give us hints into the extent allocation trees. Which
1325 * blocks are free etc etc
1327 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1329 #define BTRFS_DEV_EXTENT_KEY 204
1330 #define BTRFS_DEV_ITEM_KEY 216
1331 #define BTRFS_CHUNK_ITEM_KEY 228
1334 * string items are for debugging. They just store a short string of
1337 #define BTRFS_STRING_ITEM_KEY 253
1339 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1340 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1341 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1342 #define BTRFS_MOUNT_SSD (1 << 3)
1343 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1344 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1345 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1346 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1347 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1348 #define BTRFS_MOUNT_NOSSD (1 << 9)
1349 #define BTRFS_MOUNT_DISCARD (1 << 10)
1350 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1351 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1352 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1353 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1354 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1355 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1356 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1358 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1359 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1360 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1365 #define BTRFS_INODE_NODATASUM (1 << 0)
1366 #define BTRFS_INODE_NODATACOW (1 << 1)
1367 #define BTRFS_INODE_READONLY (1 << 2)
1368 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1369 #define BTRFS_INODE_PREALLOC (1 << 4)
1370 #define BTRFS_INODE_SYNC (1 << 5)
1371 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1372 #define BTRFS_INODE_APPEND (1 << 7)
1373 #define BTRFS_INODE_NODUMP (1 << 8)
1374 #define BTRFS_INODE_NOATIME (1 << 9)
1375 #define BTRFS_INODE_DIRSYNC (1 << 10)
1376 #define BTRFS_INODE_COMPRESS (1 << 11)
1378 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1380 /* some macros to generate set/get funcs for the struct fields. This
1381 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1384 #define le8_to_cpu(v) (v)
1385 #define cpu_to_le8(v) (v)
1388 #define read_eb_member(eb, ptr, type, member, result) ( \
1389 read_extent_buffer(eb, (char *)(result), \
1390 ((unsigned long)(ptr)) + \
1391 offsetof(type, member), \
1392 sizeof(((type *)0)->member)))
1394 #define write_eb_member(eb, ptr, type, member, result) ( \
1395 write_extent_buffer(eb, (char *)(result), \
1396 ((unsigned long)(ptr)) + \
1397 offsetof(type, member), \
1398 sizeof(((type *)0)->member)))
1400 #ifndef BTRFS_SETGET_FUNCS
1401 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1402 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1403 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1406 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1407 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1409 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1410 u##bits res = le##bits##_to_cpu(p->member); \
1411 kunmap_atomic(p, KM_USER0); \
1414 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1417 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1418 p->member = cpu_to_le##bits(val); \
1419 kunmap_atomic(p, KM_USER0); \
1422 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1423 static inline u##bits btrfs_##name(type *s) \
1425 return le##bits##_to_cpu(s->member); \
1427 static inline void btrfs_set_##name(type *s, u##bits val) \
1429 s->member = cpu_to_le##bits(val); \
1432 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1433 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1434 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1435 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1436 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1437 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1439 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1440 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1441 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1442 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1443 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1444 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1446 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1447 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1449 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1451 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1453 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1455 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1457 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1458 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1460 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1462 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1464 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1467 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1469 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1472 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1474 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1477 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1478 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1479 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1480 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1481 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1482 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1483 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1484 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1485 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1486 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1487 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1489 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1491 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1494 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1495 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1496 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1498 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1500 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1502 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1504 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1505 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1507 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1509 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1510 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1512 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1515 unsigned long offset = (unsigned long)c;
1516 offset += offsetof(struct btrfs_chunk, stripe);
1517 offset += nr * sizeof(struct btrfs_stripe);
1518 return (struct btrfs_stripe *)offset;
1521 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1523 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1526 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1527 struct btrfs_chunk *c, int nr)
1529 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1532 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1533 struct btrfs_chunk *c, int nr)
1535 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1538 /* struct btrfs_block_group_item */
1539 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1541 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1543 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1544 struct btrfs_block_group_item, chunk_objectid, 64);
1546 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1547 struct btrfs_block_group_item, chunk_objectid, 64);
1548 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1549 struct btrfs_block_group_item, flags, 64);
1550 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1551 struct btrfs_block_group_item, flags, 64);
1553 /* struct btrfs_inode_ref */
1554 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1555 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1557 /* struct btrfs_inode_item */
1558 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1559 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1560 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1561 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1562 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1563 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1564 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1565 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1566 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1567 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1568 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1569 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1571 static inline struct btrfs_timespec *
1572 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1574 unsigned long ptr = (unsigned long)inode_item;
1575 ptr += offsetof(struct btrfs_inode_item, atime);
1576 return (struct btrfs_timespec *)ptr;
1579 static inline struct btrfs_timespec *
1580 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1582 unsigned long ptr = (unsigned long)inode_item;
1583 ptr += offsetof(struct btrfs_inode_item, mtime);
1584 return (struct btrfs_timespec *)ptr;
1587 static inline struct btrfs_timespec *
1588 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1590 unsigned long ptr = (unsigned long)inode_item;
1591 ptr += offsetof(struct btrfs_inode_item, ctime);
1592 return (struct btrfs_timespec *)ptr;
1595 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1596 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1598 /* struct btrfs_dev_extent */
1599 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1601 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1602 chunk_objectid, 64);
1603 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1605 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1607 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1609 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1610 return (u8 *)((unsigned long)dev + ptr);
1613 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1614 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1616 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1618 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1621 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1623 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1624 struct btrfs_tree_block_info *item,
1625 struct btrfs_disk_key *key)
1627 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1630 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1631 struct btrfs_tree_block_info *item,
1632 struct btrfs_disk_key *key)
1634 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1637 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1639 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1641 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1643 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1646 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1649 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1651 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1654 static inline u32 btrfs_extent_inline_ref_size(int type)
1656 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1657 type == BTRFS_SHARED_BLOCK_REF_KEY)
1658 return sizeof(struct btrfs_extent_inline_ref);
1659 if (type == BTRFS_SHARED_DATA_REF_KEY)
1660 return sizeof(struct btrfs_shared_data_ref) +
1661 sizeof(struct btrfs_extent_inline_ref);
1662 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1663 return sizeof(struct btrfs_extent_data_ref) +
1664 offsetof(struct btrfs_extent_inline_ref, offset);
1669 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1670 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1672 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1673 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1675 /* struct btrfs_node */
1676 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1677 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1679 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1682 ptr = offsetof(struct btrfs_node, ptrs) +
1683 sizeof(struct btrfs_key_ptr) * nr;
1684 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1687 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1691 ptr = offsetof(struct btrfs_node, ptrs) +
1692 sizeof(struct btrfs_key_ptr) * nr;
1693 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1696 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1699 ptr = offsetof(struct btrfs_node, ptrs) +
1700 sizeof(struct btrfs_key_ptr) * nr;
1701 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1704 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1708 ptr = offsetof(struct btrfs_node, ptrs) +
1709 sizeof(struct btrfs_key_ptr) * nr;
1710 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1713 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1715 return offsetof(struct btrfs_node, ptrs) +
1716 sizeof(struct btrfs_key_ptr) * nr;
1719 void btrfs_node_key(struct extent_buffer *eb,
1720 struct btrfs_disk_key *disk_key, int nr);
1722 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1723 struct btrfs_disk_key *disk_key, int nr)
1726 ptr = btrfs_node_key_ptr_offset(nr);
1727 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1728 struct btrfs_key_ptr, key, disk_key);
1731 /* struct btrfs_item */
1732 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1733 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1735 static inline unsigned long btrfs_item_nr_offset(int nr)
1737 return offsetof(struct btrfs_leaf, items) +
1738 sizeof(struct btrfs_item) * nr;
1741 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1744 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1747 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1748 struct btrfs_item *item)
1750 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1753 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1755 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1758 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1760 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1763 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1765 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1768 static inline void btrfs_item_key(struct extent_buffer *eb,
1769 struct btrfs_disk_key *disk_key, int nr)
1771 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1772 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1775 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1776 struct btrfs_disk_key *disk_key, int nr)
1778 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1779 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1782 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1785 * struct btrfs_root_ref
1787 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1788 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1789 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1791 /* struct btrfs_dir_item */
1792 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1793 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1794 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1795 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1797 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1798 struct btrfs_dir_item *item,
1799 struct btrfs_disk_key *key)
1801 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1804 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1805 struct btrfs_dir_item *item,
1806 struct btrfs_disk_key *key)
1808 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1811 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1813 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1815 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1818 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1819 struct btrfs_free_space_header *h,
1820 struct btrfs_disk_key *key)
1822 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1825 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1826 struct btrfs_free_space_header *h,
1827 struct btrfs_disk_key *key)
1829 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1832 /* struct btrfs_disk_key */
1833 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1835 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1836 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1838 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1839 struct btrfs_disk_key *disk)
1841 cpu->offset = le64_to_cpu(disk->offset);
1842 cpu->type = disk->type;
1843 cpu->objectid = le64_to_cpu(disk->objectid);
1846 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1847 struct btrfs_key *cpu)
1849 disk->offset = cpu_to_le64(cpu->offset);
1850 disk->type = cpu->type;
1851 disk->objectid = cpu_to_le64(cpu->objectid);
1854 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1855 struct btrfs_key *key, int nr)
1857 struct btrfs_disk_key disk_key;
1858 btrfs_node_key(eb, &disk_key, nr);
1859 btrfs_disk_key_to_cpu(key, &disk_key);
1862 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1863 struct btrfs_key *key, int nr)
1865 struct btrfs_disk_key disk_key;
1866 btrfs_item_key(eb, &disk_key, nr);
1867 btrfs_disk_key_to_cpu(key, &disk_key);
1870 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1871 struct btrfs_dir_item *item,
1872 struct btrfs_key *key)
1874 struct btrfs_disk_key disk_key;
1875 btrfs_dir_item_key(eb, item, &disk_key);
1876 btrfs_disk_key_to_cpu(key, &disk_key);
1880 static inline u8 btrfs_key_type(struct btrfs_key *key)
1885 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1890 /* struct btrfs_header */
1891 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1892 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1894 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1895 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1896 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1897 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1899 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1901 return (btrfs_header_flags(eb) & flag) == flag;
1904 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1906 u64 flags = btrfs_header_flags(eb);
1907 btrfs_set_header_flags(eb, flags | flag);
1908 return (flags & flag) == flag;
1911 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1913 u64 flags = btrfs_header_flags(eb);
1914 btrfs_set_header_flags(eb, flags & ~flag);
1915 return (flags & flag) == flag;
1918 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1920 u64 flags = btrfs_header_flags(eb);
1921 return flags >> BTRFS_BACKREF_REV_SHIFT;
1924 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1927 u64 flags = btrfs_header_flags(eb);
1928 flags &= ~BTRFS_BACKREF_REV_MASK;
1929 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1930 btrfs_set_header_flags(eb, flags);
1933 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1935 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1939 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1941 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1945 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1947 return btrfs_header_level(eb) == 0;
1950 /* struct btrfs_root_item */
1951 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1953 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1954 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1955 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1957 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1959 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1960 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1961 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1962 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1963 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1964 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1965 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1966 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1969 static inline bool btrfs_root_readonly(struct btrfs_root *root)
1971 return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
1974 /* struct btrfs_super_block */
1976 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1977 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1978 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1980 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1981 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1982 struct btrfs_super_block, sys_chunk_array_size, 32);
1983 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1984 struct btrfs_super_block, chunk_root_generation, 64);
1985 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1987 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1989 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1990 chunk_root_level, 8);
1991 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1993 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1994 log_root_transid, 64);
1995 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1997 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1999 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2001 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2003 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2005 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2007 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2009 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2010 root_dir_objectid, 64);
2011 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2013 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2015 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2016 compat_ro_flags, 64);
2017 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2018 incompat_flags, 64);
2019 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2021 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2022 cache_generation, 64);
2024 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2026 int t = btrfs_super_csum_type(s);
2027 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2028 return btrfs_csum_sizes[t];
2031 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2033 return offsetof(struct btrfs_leaf, items);
2036 /* struct btrfs_file_extent_item */
2037 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2039 static inline unsigned long
2040 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2042 unsigned long offset = (unsigned long)e;
2043 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2047 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2049 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2052 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2054 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2056 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2057 disk_num_bytes, 64);
2058 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2060 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2062 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2064 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2066 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2068 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2069 other_encoding, 16);
2071 /* this returns the number of file bytes represented by the inline item.
2072 * If an item is compressed, this is the uncompressed size
2074 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2075 struct btrfs_file_extent_item *e)
2077 return btrfs_file_extent_ram_bytes(eb, e);
2081 * this returns the number of bytes used by the item on disk, minus the
2082 * size of any extent headers. If a file is compressed on disk, this is
2083 * the compressed size
2085 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2086 struct btrfs_item *e)
2088 unsigned long offset;
2089 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2090 return btrfs_item_size(eb, e) - offset;
2093 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
2095 return sb->s_fs_info;
2098 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2101 return root->leafsize;
2102 return root->nodesize;
2105 /* helper function to cast into the data area of the leaf. */
2106 #define btrfs_item_ptr(leaf, slot, type) \
2107 ((type *)(btrfs_leaf_data(leaf) + \
2108 btrfs_item_offset_nr(leaf, slot)))
2110 #define btrfs_item_ptr_offset(leaf, slot) \
2111 ((unsigned long)(btrfs_leaf_data(leaf) + \
2112 btrfs_item_offset_nr(leaf, slot)))
2114 static inline struct dentry *fdentry(struct file *file)
2116 return file->f_path.dentry;
2119 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2121 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2122 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2126 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2129 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2133 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2134 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2135 struct btrfs_root *root, unsigned long count);
2136 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2137 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2138 struct btrfs_root *root, u64 bytenr,
2139 u64 num_bytes, u64 *refs, u64 *flags);
2140 int btrfs_pin_extent(struct btrfs_root *root,
2141 u64 bytenr, u64 num, int reserved);
2142 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2143 struct btrfs_root *root,
2144 u64 objectid, u64 offset, u64 bytenr);
2145 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2146 struct btrfs_fs_info *info,
2148 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2149 u64 btrfs_find_block_group(struct btrfs_root *root,
2150 u64 search_start, u64 search_hint, int owner);
2151 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2152 struct btrfs_root *root, u32 blocksize,
2153 u64 parent, u64 root_objectid,
2154 struct btrfs_disk_key *key, int level,
2155 u64 hint, u64 empty_size);
2156 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2157 struct btrfs_root *root,
2158 struct extent_buffer *buf,
2159 u64 parent, int last_ref);
2160 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2161 struct btrfs_root *root,
2162 u64 bytenr, u32 blocksize,
2164 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2165 struct btrfs_root *root,
2166 u64 root_objectid, u64 owner,
2167 u64 offset, struct btrfs_key *ins);
2168 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2169 struct btrfs_root *root,
2170 u64 root_objectid, u64 owner, u64 offset,
2171 struct btrfs_key *ins);
2172 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2173 struct btrfs_root *root,
2174 u64 num_bytes, u64 min_alloc_size,
2175 u64 empty_size, u64 hint_byte,
2176 u64 search_end, struct btrfs_key *ins,
2178 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2179 struct extent_buffer *buf, int full_backref);
2180 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2181 struct extent_buffer *buf, int full_backref);
2182 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2183 struct btrfs_root *root,
2184 u64 bytenr, u64 num_bytes, u64 flags,
2186 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2187 struct btrfs_root *root,
2188 u64 bytenr, u64 num_bytes, u64 parent,
2189 u64 root_objectid, u64 owner, u64 offset);
2191 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2192 int btrfs_update_reserved_bytes(struct btrfs_block_group_cache *cache,
2193 u64 num_bytes, int reserve, int sinfo);
2194 int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2195 struct btrfs_root *root);
2196 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2197 struct btrfs_root *root);
2198 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2199 struct btrfs_root *root,
2200 u64 bytenr, u64 num_bytes, u64 parent,
2201 u64 root_objectid, u64 owner, u64 offset);
2203 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2204 struct btrfs_root *root);
2205 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2206 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2207 int btrfs_read_block_groups(struct btrfs_root *root);
2208 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2209 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2210 struct btrfs_root *root, u64 bytes_used,
2211 u64 type, u64 chunk_objectid, u64 chunk_offset,
2213 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2214 struct btrfs_root *root, u64 group_start);
2215 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2216 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2217 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2218 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2219 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2220 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2221 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
2222 struct btrfs_root *root,
2224 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2225 struct btrfs_root *root);
2226 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2227 struct inode *inode);
2228 void btrfs_orphan_release_metadata(struct inode *inode);
2229 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2230 struct btrfs_pending_snapshot *pending);
2231 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2232 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2233 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2234 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2235 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2236 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2237 void btrfs_free_block_rsv(struct btrfs_root *root,
2238 struct btrfs_block_rsv *rsv);
2239 void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
2240 struct btrfs_block_rsv *rsv);
2241 int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
2242 struct btrfs_root *root,
2243 struct btrfs_block_rsv *block_rsv,
2245 int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
2246 struct btrfs_root *root,
2247 struct btrfs_block_rsv *block_rsv,
2248 u64 min_reserved, int min_factor);
2249 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2250 struct btrfs_block_rsv *dst_rsv,
2252 void btrfs_block_rsv_release(struct btrfs_root *root,
2253 struct btrfs_block_rsv *block_rsv,
2255 int btrfs_truncate_reserve_metadata(struct btrfs_trans_handle *trans,
2256 struct btrfs_root *root,
2257 struct btrfs_block_rsv *rsv);
2258 int btrfs_set_block_group_ro(struct btrfs_root *root,
2259 struct btrfs_block_group_cache *cache);
2260 int btrfs_set_block_group_rw(struct btrfs_root *root,
2261 struct btrfs_block_group_cache *cache);
2262 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2263 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2264 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2265 u64 start, u64 end);
2266 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2267 u64 num_bytes, u64 *actual_bytes);
2268 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2269 struct btrfs_root *root, u64 type);
2270 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2272 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2274 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2275 int level, int *slot);
2276 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2277 int btrfs_previous_item(struct btrfs_root *root,
2278 struct btrfs_path *path, u64 min_objectid,
2280 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2281 struct btrfs_root *root, struct btrfs_path *path,
2282 struct btrfs_key *new_key);
2283 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2284 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2285 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2286 struct btrfs_key *key, int lowest_level,
2287 int cache_only, u64 min_trans);
2288 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2289 struct btrfs_key *max_key,
2290 struct btrfs_path *path, int cache_only,
2292 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2293 struct btrfs_root *root, struct extent_buffer *buf,
2294 struct extent_buffer *parent, int parent_slot,
2295 struct extent_buffer **cow_ret);
2296 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2297 struct btrfs_root *root,
2298 struct extent_buffer *buf,
2299 struct extent_buffer **cow_ret, u64 new_root_objectid);
2300 int btrfs_block_can_be_shared(struct btrfs_root *root,
2301 struct extent_buffer *buf);
2302 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2303 *root, struct btrfs_path *path, u32 data_size);
2304 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2305 struct btrfs_root *root,
2306 struct btrfs_path *path,
2307 u32 new_size, int from_end);
2308 int btrfs_split_item(struct btrfs_trans_handle *trans,
2309 struct btrfs_root *root,
2310 struct btrfs_path *path,
2311 struct btrfs_key *new_key,
2312 unsigned long split_offset);
2313 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2314 struct btrfs_root *root,
2315 struct btrfs_path *path,
2316 struct btrfs_key *new_key);
2317 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2318 *root, struct btrfs_key *key, struct btrfs_path *p, int
2320 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2321 struct btrfs_root *root, struct extent_buffer *parent,
2322 int start_slot, int cache_only, u64 *last_ret,
2323 struct btrfs_key *progress);
2324 void btrfs_release_path(struct btrfs_path *p);
2325 struct btrfs_path *btrfs_alloc_path(void);
2326 void btrfs_free_path(struct btrfs_path *p);
2327 void btrfs_set_path_blocking(struct btrfs_path *p);
2328 void btrfs_clear_path_blocking(struct btrfs_path *p,
2329 struct extent_buffer *held);
2330 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2332 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2333 struct btrfs_path *path, int slot, int nr);
2334 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2335 struct btrfs_root *root,
2336 struct btrfs_path *path)
2338 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2341 int setup_items_for_insert(struct btrfs_trans_handle *trans,
2342 struct btrfs_root *root, struct btrfs_path *path,
2343 struct btrfs_key *cpu_key, u32 *data_size,
2344 u32 total_data, u32 total_size, int nr);
2345 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2346 *root, struct btrfs_key *key, void *data, u32 data_size);
2347 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2348 struct btrfs_root *root,
2349 struct btrfs_path *path,
2350 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2352 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2353 struct btrfs_root *root,
2354 struct btrfs_path *path,
2355 struct btrfs_key *key,
2358 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2361 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2362 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2363 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2364 int btrfs_drop_snapshot(struct btrfs_root *root,
2365 struct btrfs_block_rsv *block_rsv, int update_ref);
2366 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2367 struct btrfs_root *root,
2368 struct extent_buffer *node,
2369 struct extent_buffer *parent);
2370 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2373 * Get synced with close_ctree()
2376 return fs_info->closing;
2380 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2381 struct btrfs_path *path,
2382 u64 root_id, u64 ref_id);
2383 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2384 struct btrfs_root *tree_root,
2385 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2386 const char *name, int name_len);
2387 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2388 struct btrfs_root *tree_root,
2389 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2390 const char *name, int name_len);
2391 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2392 struct btrfs_key *key);
2393 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2394 *root, struct btrfs_key *key, struct btrfs_root_item
2396 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2397 *root, struct btrfs_key *key, struct btrfs_root_item
2399 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2400 btrfs_root_item *item, struct btrfs_key *key);
2401 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2402 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2403 int btrfs_set_root_node(struct btrfs_root_item *item,
2404 struct extent_buffer *node);
2405 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2408 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2409 struct btrfs_root *root, const char *name,
2410 int name_len, struct inode *dir,
2411 struct btrfs_key *location, u8 type, u64 index);
2412 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2413 struct btrfs_root *root,
2414 struct btrfs_path *path, u64 dir,
2415 const char *name, int name_len,
2417 struct btrfs_dir_item *
2418 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2419 struct btrfs_root *root,
2420 struct btrfs_path *path, u64 dir,
2421 u64 objectid, const char *name, int name_len,
2423 struct btrfs_dir_item *
2424 btrfs_search_dir_index_item(struct btrfs_root *root,
2425 struct btrfs_path *path, u64 dirid,
2426 const char *name, int name_len);
2427 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2428 struct btrfs_path *path,
2429 const char *name, int name_len);
2430 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2431 struct btrfs_root *root,
2432 struct btrfs_path *path,
2433 struct btrfs_dir_item *di);
2434 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2435 struct btrfs_root *root,
2436 struct btrfs_path *path, u64 objectid,
2437 const char *name, u16 name_len,
2438 const void *data, u16 data_len);
2439 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2440 struct btrfs_root *root,
2441 struct btrfs_path *path, u64 dir,
2442 const char *name, u16 name_len,
2444 int verify_dir_item(struct btrfs_root *root,
2445 struct extent_buffer *leaf,
2446 struct btrfs_dir_item *dir_item);
2449 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2450 struct btrfs_root *root, u64 offset);
2451 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2452 struct btrfs_root *root, u64 offset);
2453 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2456 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2457 struct btrfs_root *root,
2458 const char *name, int name_len,
2459 u64 inode_objectid, u64 ref_objectid, u64 index);
2460 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2461 struct btrfs_root *root,
2462 const char *name, int name_len,
2463 u64 inode_objectid, u64 ref_objectid, u64 *index);
2464 struct btrfs_inode_ref *
2465 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2466 struct btrfs_root *root,
2467 struct btrfs_path *path,
2468 const char *name, int name_len,
2469 u64 inode_objectid, u64 ref_objectid, int mod);
2470 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2471 struct btrfs_root *root,
2472 struct btrfs_path *path, u64 objectid);
2473 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2474 *root, struct btrfs_path *path,
2475 struct btrfs_key *location, int mod);
2478 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2479 struct btrfs_root *root, u64 bytenr, u64 len);
2480 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2481 struct bio *bio, u32 *dst);
2482 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2483 struct bio *bio, u64 logical_offset, u32 *dst);
2484 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2485 struct btrfs_root *root,
2486 u64 objectid, u64 pos,
2487 u64 disk_offset, u64 disk_num_bytes,
2488 u64 num_bytes, u64 offset, u64 ram_bytes,
2489 u8 compression, u8 encryption, u16 other_encoding);
2490 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2491 struct btrfs_root *root,
2492 struct btrfs_path *path, u64 objectid,
2493 u64 bytenr, int mod);
2494 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2495 struct btrfs_root *root,
2496 struct btrfs_ordered_sum *sums);
2497 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2498 struct bio *bio, u64 file_start, int contig);
2499 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2500 struct btrfs_root *root,
2501 struct btrfs_path *path,
2502 u64 bytenr, int cow);
2503 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2504 struct btrfs_root *root, struct btrfs_path *path,
2506 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2507 struct list_head *list, int search_commit);
2510 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2511 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2512 #define ClearPageChecked ClearPageFsMisc
2513 #define SetPageChecked SetPageFsMisc
2514 #define PageChecked PageFsMisc
2517 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2518 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2519 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2520 struct btrfs_root *root,
2521 struct inode *dir, struct inode *inode,
2522 const char *name, int name_len);
2523 int btrfs_add_link(struct btrfs_trans_handle *trans,
2524 struct inode *parent_inode, struct inode *inode,
2525 const char *name, int name_len, int add_backref, u64 index);
2526 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2527 struct btrfs_root *root,
2528 struct inode *dir, u64 objectid,
2529 const char *name, int name_len);
2530 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2531 struct btrfs_root *root,
2532 struct inode *inode, u64 new_size,
2535 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2536 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2537 struct extent_state **cached_state);
2538 int btrfs_writepages(struct address_space *mapping,
2539 struct writeback_control *wbc);
2540 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2541 struct btrfs_root *new_root, u64 new_dirid);
2542 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2543 size_t size, struct bio *bio, unsigned long bio_flags);
2545 unsigned long btrfs_force_ra(struct address_space *mapping,
2546 struct file_ra_state *ra, struct file *file,
2547 pgoff_t offset, pgoff_t last_index);
2548 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2549 int btrfs_readpage(struct file *file, struct page *page);
2550 void btrfs_evict_inode(struct inode *inode);
2551 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2552 void btrfs_dirty_inode(struct inode *inode, int flags);
2553 struct inode *btrfs_alloc_inode(struct super_block *sb);
2554 void btrfs_destroy_inode(struct inode *inode);
2555 int btrfs_drop_inode(struct inode *inode);
2556 int btrfs_init_cachep(void);
2557 void btrfs_destroy_cachep(void);
2558 long btrfs_ioctl_trans_end(struct file *file);
2559 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2560 struct btrfs_root *root, int *was_new);
2561 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2562 size_t pg_offset, u64 start, u64 end,
2564 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2565 struct btrfs_root *root,
2566 struct inode *inode);
2567 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2568 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2569 int btrfs_orphan_cleanup(struct btrfs_root *root);
2570 void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle *trans,
2571 struct btrfs_pending_snapshot *pending,
2572 u64 *bytes_to_reserve);
2573 void btrfs_orphan_post_snapshot(struct btrfs_trans_handle *trans,
2574 struct btrfs_pending_snapshot *pending);
2575 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2576 struct btrfs_root *root);
2577 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2578 int btrfs_invalidate_inodes(struct btrfs_root *root);
2579 void btrfs_add_delayed_iput(struct inode *inode);
2580 void btrfs_run_delayed_iputs(struct btrfs_root *root);
2581 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2582 u64 start, u64 num_bytes, u64 min_size,
2583 loff_t actual_len, u64 *alloc_hint);
2584 int btrfs_prealloc_file_range_trans(struct inode *inode,
2585 struct btrfs_trans_handle *trans, int mode,
2586 u64 start, u64 num_bytes, u64 min_size,
2587 loff_t actual_len, u64 *alloc_hint);
2588 extern const struct dentry_operations btrfs_dentry_operations;
2591 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2592 void btrfs_update_iflags(struct inode *inode);
2593 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
2594 int btrfs_defrag_file(struct inode *inode, struct file *file,
2595 struct btrfs_ioctl_defrag_range_args *range,
2596 u64 newer_than, unsigned long max_pages);
2598 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2599 struct inode *inode);
2600 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2601 int btrfs_sync_file(struct file *file, int datasync);
2602 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2604 extern const struct file_operations btrfs_file_operations;
2605 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2606 u64 start, u64 end, u64 *hint_byte, int drop_cache);
2607 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2608 struct inode *inode, u64 start, u64 end);
2609 int btrfs_release_file(struct inode *inode, struct file *file);
2610 void btrfs_drop_pages(struct page **pages, size_t num_pages);
2611 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
2612 struct page **pages, size_t num_pages,
2613 loff_t pos, size_t write_bytes,
2614 struct extent_state **cached);
2617 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2618 struct btrfs_root *root, int cache_only);
2621 int btrfs_init_sysfs(void);
2622 void btrfs_exit_sysfs(void);
2625 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2628 int btrfs_parse_options(struct btrfs_root *root, char *options);
2629 int btrfs_sync_fs(struct super_block *sb, int wait);
2630 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
2631 unsigned int line, int errno);
2633 #define btrfs_std_error(fs_info, errno) \
2636 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2640 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2641 int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags);
2643 #define btrfs_check_acl NULL
2645 int btrfs_init_acl(struct btrfs_trans_handle *trans,
2646 struct inode *inode, struct inode *dir);
2647 int btrfs_acl_chmod(struct inode *inode);
2650 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2651 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2652 struct btrfs_root *root);
2653 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2654 struct btrfs_root *root);
2655 int btrfs_recover_relocation(struct btrfs_root *root);
2656 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
2657 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
2658 struct btrfs_root *root, struct extent_buffer *buf,
2659 struct extent_buffer *cow);
2660 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
2661 struct btrfs_pending_snapshot *pending,
2662 u64 *bytes_to_reserve);
2663 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
2664 struct btrfs_pending_snapshot *pending);
2667 int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
2668 struct btrfs_scrub_progress *progress, int readonly);
2669 int btrfs_scrub_pause(struct btrfs_root *root);
2670 int btrfs_scrub_pause_super(struct btrfs_root *root);
2671 int btrfs_scrub_continue(struct btrfs_root *root);
2672 int btrfs_scrub_continue_super(struct btrfs_root *root);
2673 int btrfs_scrub_cancel(struct btrfs_root *root);
2674 int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
2675 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
2676 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
2677 struct btrfs_scrub_progress *progress);