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/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <asm/kmap_types.h>
30 #include "extent_io.h"
31 #include "extent_map.h"
32 #include "async-thread.h"
34 struct btrfs_trans_handle;
35 struct btrfs_transaction;
36 extern struct kmem_cache *btrfs_trans_handle_cachep;
37 extern struct kmem_cache *btrfs_transaction_cachep;
38 extern struct kmem_cache *btrfs_bit_radix_cachep;
39 extern struct kmem_cache *btrfs_path_cachep;
40 struct btrfs_ordered_sum;
42 #define BTRFS_MAGIC "_BHRfS_M"
44 #define BTRFS_ACL_NOT_CACHED ((void *)-1)
46 #define BTRFS_MAX_LEVEL 8
48 /* holds pointers to all of the tree roots */
49 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
51 /* stores information about which extents are in use, and reference counts */
52 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
55 * chunk tree stores translations from logical -> physical block numbering
56 * the super block points to the chunk tree
58 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
61 * stores information about which areas of a given device are in use.
62 * one per device. The tree of tree roots points to the device tree
64 #define BTRFS_DEV_TREE_OBJECTID 4ULL
66 /* one per subvolume, storing files and directories */
67 #define BTRFS_FS_TREE_OBJECTID 5ULL
69 /* directory objectid inside the root tree */
70 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
72 /* holds checksums of all the data extents */
73 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
75 /* orhpan objectid for tracking unlinked/truncated files */
76 #define BTRFS_ORPHAN_OBJECTID -5ULL
78 /* does write ahead logging to speed up fsyncs */
79 #define BTRFS_TREE_LOG_OBJECTID -6ULL
80 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
82 /* for space balancing */
83 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
84 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
87 * extent checksums all have this objectid
88 * this allows them to share the logging tree
91 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
93 /* dummy objectid represents multiple objectids */
94 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
97 * All files have objectids in this range.
99 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
100 #define BTRFS_LAST_FREE_OBJECTID -256ULL
101 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
105 * the device items go into the chunk tree. The key is in the form
106 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
108 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
111 * we can actually store much bigger names, but lets not confuse the rest
114 #define BTRFS_NAME_LEN 255
116 /* 32 bytes in various csum fields */
117 #define BTRFS_CSUM_SIZE 32
120 #define BTRFS_CSUM_TYPE_CRC32 0
122 static int btrfs_csum_sizes[] = { 4, 0 };
124 /* four bytes for CRC32 */
125 #define BTRFS_EMPTY_DIR_SIZE 0
127 #define BTRFS_FT_UNKNOWN 0
128 #define BTRFS_FT_REG_FILE 1
129 #define BTRFS_FT_DIR 2
130 #define BTRFS_FT_CHRDEV 3
131 #define BTRFS_FT_BLKDEV 4
132 #define BTRFS_FT_FIFO 5
133 #define BTRFS_FT_SOCK 6
134 #define BTRFS_FT_SYMLINK 7
135 #define BTRFS_FT_XATTR 8
136 #define BTRFS_FT_MAX 9
139 * the key defines the order in the tree, and so it also defines (optimal)
140 * block layout. objectid corresonds to the inode number. The flags
141 * tells us things about the object, and is a kind of stream selector.
142 * so for a given inode, keys with flags of 1 might refer to the inode
143 * data, flags of 2 may point to file data in the btree and flags == 3
144 * may point to extents.
146 * offset is the starting byte offset for this key in the stream.
148 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
149 * in cpu native order. Otherwise they are identical and their sizes
150 * should be the same (ie both packed)
152 struct btrfs_disk_key {
156 } __attribute__ ((__packed__));
162 } __attribute__ ((__packed__));
164 struct btrfs_mapping_tree {
165 struct extent_map_tree map_tree;
168 #define BTRFS_UUID_SIZE 16
169 struct btrfs_dev_item {
170 /* the internal btrfs device id */
173 /* size of the device */
179 /* optimal io alignment for this device */
182 /* optimal io width for this device */
185 /* minimal io size for this device */
188 /* type and info about this device */
191 /* expected generation for this device */
195 * starting byte of this partition on the device,
196 * to allowr for stripe alignment in the future
200 /* grouping information for allocation decisions */
203 /* seek speed 0-100 where 100 is fastest */
206 /* bandwidth 0-100 where 100 is fastest */
209 /* btrfs generated uuid for this device */
210 u8 uuid[BTRFS_UUID_SIZE];
212 /* uuid of FS who owns this device */
213 u8 fsid[BTRFS_UUID_SIZE];
214 } __attribute__ ((__packed__));
216 struct btrfs_stripe {
219 u8 dev_uuid[BTRFS_UUID_SIZE];
220 } __attribute__ ((__packed__));
223 /* size of this chunk in bytes */
226 /* objectid of the root referencing this chunk */
232 /* optimal io alignment for this chunk */
235 /* optimal io width for this chunk */
238 /* minimal io size for this chunk */
241 /* 2^16 stripes is quite a lot, a second limit is the size of a single
246 /* sub stripes only matter for raid10 */
248 struct btrfs_stripe stripe;
249 /* additional stripes go here */
250 } __attribute__ ((__packed__));
252 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
254 BUG_ON(num_stripes == 0);
255 return sizeof(struct btrfs_chunk) +
256 sizeof(struct btrfs_stripe) * (num_stripes - 1);
259 #define BTRFS_FSID_SIZE 16
260 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
263 * every tree block (leaf or node) starts with this header.
265 struct btrfs_header {
266 /* these first four must match the super block */
267 u8 csum[BTRFS_CSUM_SIZE];
268 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
269 __le64 bytenr; /* which block this node is supposed to live in */
272 /* allowed to be different from the super from here on down */
273 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
278 } __attribute__ ((__packed__));
280 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
281 sizeof(struct btrfs_header)) / \
282 sizeof(struct btrfs_key_ptr))
283 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
284 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
285 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
286 sizeof(struct btrfs_item) - \
287 sizeof(struct btrfs_file_extent_item))
289 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
292 * this is a very generous portion of the super block, giving us
293 * room to translate 14 chunks with 3 stripes each.
295 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
296 #define BTRFS_LABEL_SIZE 256
299 * the super block basically lists the main trees of the FS
300 * it currently lacks any block count etc etc
302 struct btrfs_super_block {
303 u8 csum[BTRFS_CSUM_SIZE];
304 /* the first 4 fields must match struct btrfs_header */
305 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
306 __le64 bytenr; /* this block number */
309 /* allowed to be different from the btrfs_header from here own down */
316 /* this will help find the new super based on the log root */
317 __le64 log_root_transid;
320 __le64 root_dir_objectid;
326 __le32 sys_chunk_array_size;
327 __le64 chunk_root_generation;
329 __le64 compat_ro_flags;
330 __le64 incompat_flags;
335 struct btrfs_dev_item dev_item;
337 char label[BTRFS_LABEL_SIZE];
339 /* future expansion */
341 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
342 } __attribute__ ((__packed__));
345 * Compat flags that we support. If any incompat flags are set other than the
346 * ones specified below then we will fail to mount
348 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
349 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
350 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
353 * A leaf is full of items. offset and size tell us where to find
354 * the item in the leaf (relative to the start of the data area)
357 struct btrfs_disk_key key;
360 } __attribute__ ((__packed__));
363 * leaves have an item area and a data area:
364 * [item0, item1....itemN] [free space] [dataN...data1, data0]
366 * The data is separate from the items to get the keys closer together
370 struct btrfs_header header;
371 struct btrfs_item items[];
372 } __attribute__ ((__packed__));
375 * all non-leaf blocks are nodes, they hold only keys and pointers to
378 struct btrfs_key_ptr {
379 struct btrfs_disk_key key;
382 } __attribute__ ((__packed__));
385 struct btrfs_header header;
386 struct btrfs_key_ptr ptrs[];
387 } __attribute__ ((__packed__));
390 * btrfs_paths remember the path taken from the root down to the leaf.
391 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
392 * to any other levels that are present.
394 * The slots array records the index of the item or block pointer
395 * used while walking the tree.
398 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
399 int slots[BTRFS_MAX_LEVEL];
400 /* if there is real range locking, this locks field will change */
401 int locks[BTRFS_MAX_LEVEL];
403 /* keep some upper locks as we walk down */
407 * set by btrfs_split_item, tells search_slot to keep all locks
408 * and to force calls to keep space in the nodes
410 unsigned int search_for_split:1;
411 unsigned int keep_locks:1;
412 unsigned int skip_locking:1;
413 unsigned int leave_spinning:1;
417 * items in the extent btree are used to record the objectid of the
418 * owner of the block and the number of references
420 struct btrfs_extent_item {
422 } __attribute__ ((__packed__));
424 struct btrfs_extent_ref {
429 } __attribute__ ((__packed__));
431 /* dev extents record free space on individual devices. The owner
432 * field points back to the chunk allocation mapping tree that allocated
433 * the extent. The chunk tree uuid field is a way to double check the owner
435 struct btrfs_dev_extent {
437 __le64 chunk_objectid;
440 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
441 } __attribute__ ((__packed__));
443 struct btrfs_inode_ref {
447 } __attribute__ ((__packed__));
449 struct btrfs_timespec {
452 } __attribute__ ((__packed__));
454 enum btrfs_compression_type {
455 BTRFS_COMPRESS_NONE = 0,
456 BTRFS_COMPRESS_ZLIB = 1,
457 BTRFS_COMPRESS_LAST = 2,
460 struct btrfs_inode_item {
461 /* nfs style generation number */
463 /* transid that last touched this inode */
475 /* modification sequence number for NFS */
479 * a little future expansion, for more than this we can
480 * just grow the inode item and version it
483 struct btrfs_timespec atime;
484 struct btrfs_timespec ctime;
485 struct btrfs_timespec mtime;
486 struct btrfs_timespec otime;
487 } __attribute__ ((__packed__));
489 struct btrfs_dir_log_item {
491 } __attribute__ ((__packed__));
493 struct btrfs_dir_item {
494 struct btrfs_disk_key location;
499 } __attribute__ ((__packed__));
501 struct btrfs_root_item {
502 struct btrfs_inode_item inode;
508 __le64 last_snapshot;
511 struct btrfs_disk_key drop_progress;
514 } __attribute__ ((__packed__));
517 * this is used for both forward and backward root refs
519 struct btrfs_root_ref {
523 } __attribute__ ((__packed__));
525 #define BTRFS_FILE_EXTENT_INLINE 0
526 #define BTRFS_FILE_EXTENT_REG 1
527 #define BTRFS_FILE_EXTENT_PREALLOC 2
529 struct btrfs_file_extent_item {
531 * transaction id that created this extent
535 * max number of bytes to hold this extent in ram
536 * when we split a compressed extent we can't know how big
537 * each of the resulting pieces will be. So, this is
538 * an upper limit on the size of the extent in ram instead of
544 * 32 bits for the various ways we might encode the data,
545 * including compression and encryption. If any of these
546 * are set to something a given disk format doesn't understand
547 * it is treated like an incompat flag for reading and writing,
552 __le16 other_encoding; /* spare for later use */
554 /* are we inline data or a real extent? */
558 * disk space consumed by the extent, checksum blocks are included
562 __le64 disk_num_bytes;
564 * the logical offset in file blocks (no csums)
565 * this extent record is for. This allows a file extent to point
566 * into the middle of an existing extent on disk, sharing it
567 * between two snapshots (useful if some bytes in the middle of the
568 * extent have changed
572 * the logical number of file blocks (no csums included). This
573 * always reflects the size uncompressed and without encoding.
577 } __attribute__ ((__packed__));
579 struct btrfs_csum_item {
581 } __attribute__ ((__packed__));
583 /* different types of block groups (and chunks) */
584 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
585 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
586 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
587 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
588 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
589 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
590 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
592 struct btrfs_block_group_item {
594 __le64 chunk_objectid;
596 } __attribute__ ((__packed__));
598 struct btrfs_space_info {
601 u64 total_bytes; /* total bytes in the space */
602 u64 bytes_used; /* total bytes used on disk */
603 u64 bytes_pinned; /* total bytes pinned, will be freed when the
604 transaction finishes */
605 u64 bytes_reserved; /* total bytes the allocator has reserved for
606 current allocations */
607 u64 bytes_readonly; /* total bytes that are read only */
609 /* delalloc accounting */
610 u64 bytes_delalloc; /* number of bytes reserved for allocation,
611 this space is not necessarily reserved yet
613 u64 bytes_may_use; /* number of bytes that may be used for
616 int full; /* indicates that we cannot allocate any more
617 chunks for this space */
618 int force_alloc; /* set if we need to force a chunk alloc for
621 struct list_head list;
623 /* for block groups in our same type */
624 struct list_head block_groups;
626 struct rw_semaphore groups_sem;
629 struct btrfs_free_space {
630 struct rb_node bytes_index;
631 struct rb_node offset_index;
636 struct btrfs_block_group_cache {
637 struct btrfs_key key;
638 struct btrfs_block_group_item item;
640 struct mutex alloc_mutex;
641 struct mutex cache_mutex;
649 struct btrfs_space_info *space_info;
651 /* free space cache stuff */
652 struct rb_root free_space_bytes;
653 struct rb_root free_space_offset;
655 /* block group cache stuff */
656 struct rb_node cache_node;
658 /* for block groups in the same raid type */
659 struct list_head list;
665 struct btrfs_leaf_ref_tree {
667 struct list_head list;
672 struct btrfs_fs_devices;
673 struct btrfs_fs_info {
674 u8 fsid[BTRFS_FSID_SIZE];
675 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
676 struct btrfs_root *extent_root;
677 struct btrfs_root *tree_root;
678 struct btrfs_root *chunk_root;
679 struct btrfs_root *dev_root;
680 struct btrfs_root *fs_root;
681 struct btrfs_root *csum_root;
683 /* the log root tree is a directory of all the other log roots */
684 struct btrfs_root *log_root_tree;
685 struct radix_tree_root fs_roots_radix;
687 /* block group cache stuff */
688 spinlock_t block_group_cache_lock;
689 struct rb_root block_group_cache_tree;
691 struct extent_io_tree pinned_extents;
693 /* logical->physical extent mapping */
694 struct btrfs_mapping_tree mapping_tree;
697 u64 last_trans_committed;
700 * this is updated to the current trans every time a full commit
701 * is required instead of the faster short fsync log commits
703 u64 last_trans_log_full_commit;
704 u64 open_ioctl_trans;
705 unsigned long mount_opt;
709 struct btrfs_transaction *running_transaction;
710 wait_queue_head_t transaction_throttle;
711 wait_queue_head_t transaction_wait;
712 wait_queue_head_t async_submit_wait;
714 struct btrfs_super_block super_copy;
715 struct btrfs_super_block super_for_commit;
716 struct block_device *__bdev;
717 struct super_block *sb;
718 struct inode *btree_inode;
719 struct backing_dev_info bdi;
720 struct mutex trans_mutex;
721 struct mutex tree_log_mutex;
722 struct mutex transaction_kthread_mutex;
723 struct mutex cleaner_mutex;
724 struct mutex pinned_mutex;
725 struct mutex chunk_mutex;
726 struct mutex drop_mutex;
727 struct mutex volume_mutex;
728 struct mutex tree_reloc_mutex;
730 struct list_head trans_list;
731 struct list_head hashers;
732 struct list_head dead_roots;
734 atomic_t nr_async_submits;
735 atomic_t async_submit_draining;
736 atomic_t nr_async_bios;
737 atomic_t async_delalloc_pages;
740 * this is used by the balancing code to wait for all the pending
743 spinlock_t ordered_extent_lock;
744 struct list_head ordered_extents;
745 struct list_head delalloc_inodes;
748 * there is a pool of worker threads for checksumming during writes
749 * and a pool for checksumming after reads. This is because readers
750 * can run with FS locks held, and the writers may be waiting for
751 * those locks. We don't want ordering in the pending list to cause
752 * deadlocks, and so the two are serviced separately.
754 * A third pool does submit_bio to avoid deadlocking with the other
757 struct btrfs_workers workers;
758 struct btrfs_workers delalloc_workers;
759 struct btrfs_workers endio_workers;
760 struct btrfs_workers endio_meta_workers;
761 struct btrfs_workers endio_meta_write_workers;
762 struct btrfs_workers endio_write_workers;
763 struct btrfs_workers submit_workers;
765 * fixup workers take dirty pages that didn't properly go through
766 * the cow mechanism and make them safe to write. It happens
767 * for the sys_munmap function call path
769 struct btrfs_workers fixup_workers;
770 struct task_struct *transaction_kthread;
771 struct task_struct *cleaner_kthread;
772 int thread_pool_size;
774 /* tree relocation relocated fields */
775 struct list_head dead_reloc_roots;
776 struct btrfs_leaf_ref_tree reloc_ref_tree;
777 struct btrfs_leaf_ref_tree shared_ref_tree;
779 struct kobject super_kobj;
780 struct completion kobj_unregister;
783 int log_root_recovering;
785 atomic_t throttle_gen;
789 /* protected by the delalloc lock, used to keep from writing
790 * metadata until there is a nice batch
792 u64 dirty_metadata_bytes;
793 struct list_head dirty_cowonly_roots;
795 struct btrfs_fs_devices *fs_devices;
798 * the space_info list is almost entirely read only. It only changes
799 * when we add a new raid type to the FS, and that happens
800 * very rarely. RCU is used to protect it.
802 struct list_head space_info;
804 spinlock_t delalloc_lock;
805 spinlock_t new_trans_lock;
810 spinlock_t ref_cache_lock;
811 u64 total_ref_cache_size;
813 u64 avail_data_alloc_bits;
814 u64 avail_metadata_alloc_bits;
815 u64 avail_system_alloc_bits;
816 u64 data_alloc_profile;
817 u64 metadata_alloc_profile;
818 u64 system_alloc_profile;
824 * in ram representation of the tree. extent_root is used for all allocations
825 * and for the extent tree extent_root root.
827 struct btrfs_dirty_root;
829 struct extent_buffer *node;
831 /* the node lock is held while changing the node pointer */
832 spinlock_t node_lock;
834 struct extent_buffer *commit_root;
835 struct btrfs_leaf_ref_tree *ref_tree;
836 struct btrfs_leaf_ref_tree ref_tree_struct;
837 struct btrfs_dirty_root *dirty_root;
838 struct btrfs_root *log_root;
839 struct btrfs_root *reloc_root;
841 struct btrfs_root_item root_item;
842 struct btrfs_key root_key;
843 struct btrfs_fs_info *fs_info;
844 struct extent_io_tree dirty_log_pages;
846 struct kobject root_kobj;
847 struct completion kobj_unregister;
848 struct mutex objectid_mutex;
850 struct mutex log_mutex;
851 wait_queue_head_t log_writer_wait;
852 wait_queue_head_t log_commit_wait[2];
853 atomic_t log_writers;
854 atomic_t log_commit[2];
855 unsigned long log_transid;
856 unsigned long log_batch;
861 /* data allocations are done in sectorsize units */
864 /* node allocations are done in nodesize units */
867 /* leaf allocations are done in leafsize units */
874 u64 last_inode_alloc;
877 u64 defrag_trans_start;
878 struct btrfs_key defrag_progress;
879 struct btrfs_key defrag_max;
885 /* the dirty list is only used by non-reference counted roots */
886 struct list_head dirty_list;
888 spinlock_t list_lock;
889 struct list_head dead_list;
890 struct list_head orphan_list;
893 * right now this just gets used so that a root has its own devid
894 * for stat. It may be used for more later
896 struct super_block anon_super;
901 * inode items have the data typically returned from stat and store other
902 * info about object characteristics. There is one for every file and dir in
905 #define BTRFS_INODE_ITEM_KEY 1
906 #define BTRFS_INODE_REF_KEY 12
907 #define BTRFS_XATTR_ITEM_KEY 24
908 #define BTRFS_ORPHAN_ITEM_KEY 48
909 /* reserve 2-15 close to the inode for later flexibility */
912 * dir items are the name -> inode pointers in a directory. There is one
913 * for every name in a directory.
915 #define BTRFS_DIR_LOG_ITEM_KEY 60
916 #define BTRFS_DIR_LOG_INDEX_KEY 72
917 #define BTRFS_DIR_ITEM_KEY 84
918 #define BTRFS_DIR_INDEX_KEY 96
920 * extent data is for file data
922 #define BTRFS_EXTENT_DATA_KEY 108
925 * extent csums are stored in a separate tree and hold csums for
926 * an entire extent on disk.
928 #define BTRFS_EXTENT_CSUM_KEY 128
931 * root items point to tree roots. There are typically in the root
932 * tree used by the super block to find all the other trees
934 #define BTRFS_ROOT_ITEM_KEY 132
937 * root backrefs tie subvols and snapshots to the directory entries that
940 #define BTRFS_ROOT_BACKREF_KEY 144
943 * root refs make a fast index for listing all of the snapshots and
944 * subvolumes referenced by a given root. They point directly to the
945 * directory item in the root that references the subvol
947 #define BTRFS_ROOT_REF_KEY 156
950 * extent items are in the extent map tree. These record which blocks
951 * are used, and how many references there are to each block
953 #define BTRFS_EXTENT_ITEM_KEY 168
954 #define BTRFS_EXTENT_REF_KEY 180
957 * block groups give us hints into the extent allocation trees. Which
958 * blocks are free etc etc
960 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
962 #define BTRFS_DEV_EXTENT_KEY 204
963 #define BTRFS_DEV_ITEM_KEY 216
964 #define BTRFS_CHUNK_ITEM_KEY 228
967 * string items are for debugging. They just store a short string of
970 #define BTRFS_STRING_ITEM_KEY 253
972 #define BTRFS_MOUNT_NODATASUM (1 << 0)
973 #define BTRFS_MOUNT_NODATACOW (1 << 1)
974 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
975 #define BTRFS_MOUNT_SSD (1 << 3)
976 #define BTRFS_MOUNT_DEGRADED (1 << 4)
977 #define BTRFS_MOUNT_COMPRESS (1 << 5)
979 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
980 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
981 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
986 #define BTRFS_INODE_NODATASUM (1 << 0)
987 #define BTRFS_INODE_NODATACOW (1 << 1)
988 #define BTRFS_INODE_READONLY (1 << 2)
989 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
990 #define BTRFS_INODE_PREALLOC (1 << 4)
991 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
993 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
995 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
997 /* some macros to generate set/get funcs for the struct fields. This
998 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1001 #define le8_to_cpu(v) (v)
1002 #define cpu_to_le8(v) (v)
1005 #define read_eb_member(eb, ptr, type, member, result) ( \
1006 read_extent_buffer(eb, (char *)(result), \
1007 ((unsigned long)(ptr)) + \
1008 offsetof(type, member), \
1009 sizeof(((type *)0)->member)))
1011 #define write_eb_member(eb, ptr, type, member, result) ( \
1012 write_extent_buffer(eb, (char *)(result), \
1013 ((unsigned long)(ptr)) + \
1014 offsetof(type, member), \
1015 sizeof(((type *)0)->member)))
1017 #ifndef BTRFS_SETGET_FUNCS
1018 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1019 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1020 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1023 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1024 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1026 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1027 u##bits res = le##bits##_to_cpu(p->member); \
1028 kunmap_atomic(p, KM_USER0); \
1031 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1034 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1035 p->member = cpu_to_le##bits(val); \
1036 kunmap_atomic(p, KM_USER0); \
1039 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1040 static inline u##bits btrfs_##name(type *s) \
1042 return le##bits##_to_cpu(s->member); \
1044 static inline void btrfs_set_##name(type *s, u##bits val) \
1046 s->member = cpu_to_le##bits(val); \
1049 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1050 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1051 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1052 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1053 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1054 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1056 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1057 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1058 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1059 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1060 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1061 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1063 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1064 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1066 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1068 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1070 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1072 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1074 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1075 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1077 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1079 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1081 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1084 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1086 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1089 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1091 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1094 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1095 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1096 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1097 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1098 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1099 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1100 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1101 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1102 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1103 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1104 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1106 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1108 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1111 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1112 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1113 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1115 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1117 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1119 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1121 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1122 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1124 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1126 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1127 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1129 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1132 unsigned long offset = (unsigned long)c;
1133 offset += offsetof(struct btrfs_chunk, stripe);
1134 offset += nr * sizeof(struct btrfs_stripe);
1135 return (struct btrfs_stripe *)offset;
1138 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1140 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1143 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1144 struct btrfs_chunk *c, int nr)
1146 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1149 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1150 struct btrfs_chunk *c, int nr,
1153 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1156 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1157 struct btrfs_chunk *c, int nr)
1159 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1162 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1163 struct btrfs_chunk *c, int nr,
1166 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1169 /* struct btrfs_block_group_item */
1170 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1172 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1174 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1175 struct btrfs_block_group_item, chunk_objectid, 64);
1177 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1178 struct btrfs_block_group_item, chunk_objectid, 64);
1179 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1180 struct btrfs_block_group_item, flags, 64);
1181 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1182 struct btrfs_block_group_item, flags, 64);
1184 /* struct btrfs_inode_ref */
1185 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1186 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1188 /* struct btrfs_inode_item */
1189 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1190 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1191 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1192 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1193 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1194 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1195 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1196 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1197 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1198 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1199 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1200 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1202 static inline struct btrfs_timespec *
1203 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1205 unsigned long ptr = (unsigned long)inode_item;
1206 ptr += offsetof(struct btrfs_inode_item, atime);
1207 return (struct btrfs_timespec *)ptr;
1210 static inline struct btrfs_timespec *
1211 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1213 unsigned long ptr = (unsigned long)inode_item;
1214 ptr += offsetof(struct btrfs_inode_item, mtime);
1215 return (struct btrfs_timespec *)ptr;
1218 static inline struct btrfs_timespec *
1219 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1221 unsigned long ptr = (unsigned long)inode_item;
1222 ptr += offsetof(struct btrfs_inode_item, ctime);
1223 return (struct btrfs_timespec *)ptr;
1226 static inline struct btrfs_timespec *
1227 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1229 unsigned long ptr = (unsigned long)inode_item;
1230 ptr += offsetof(struct btrfs_inode_item, otime);
1231 return (struct btrfs_timespec *)ptr;
1234 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1235 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1237 /* struct btrfs_dev_extent */
1238 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1240 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1241 chunk_objectid, 64);
1242 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1244 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1246 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1248 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1249 return (u8 *)((unsigned long)dev + ptr);
1252 /* struct btrfs_extent_ref */
1253 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1254 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1255 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1256 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1258 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1259 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1261 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1263 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1266 /* struct btrfs_extent_item */
1267 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1268 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1271 /* struct btrfs_node */
1272 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1273 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1275 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1278 ptr = offsetof(struct btrfs_node, ptrs) +
1279 sizeof(struct btrfs_key_ptr) * nr;
1280 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1283 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1287 ptr = offsetof(struct btrfs_node, ptrs) +
1288 sizeof(struct btrfs_key_ptr) * nr;
1289 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1292 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1295 ptr = offsetof(struct btrfs_node, ptrs) +
1296 sizeof(struct btrfs_key_ptr) * nr;
1297 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1300 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1304 ptr = offsetof(struct btrfs_node, ptrs) +
1305 sizeof(struct btrfs_key_ptr) * nr;
1306 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1309 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1311 return offsetof(struct btrfs_node, ptrs) +
1312 sizeof(struct btrfs_key_ptr) * nr;
1315 void btrfs_node_key(struct extent_buffer *eb,
1316 struct btrfs_disk_key *disk_key, int nr);
1318 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1319 struct btrfs_disk_key *disk_key, int nr)
1322 ptr = btrfs_node_key_ptr_offset(nr);
1323 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1324 struct btrfs_key_ptr, key, disk_key);
1327 /* struct btrfs_item */
1328 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1329 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1331 static inline unsigned long btrfs_item_nr_offset(int nr)
1333 return offsetof(struct btrfs_leaf, items) +
1334 sizeof(struct btrfs_item) * nr;
1337 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1340 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1343 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1344 struct btrfs_item *item)
1346 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1349 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1351 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1354 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1356 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1359 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1361 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1364 static inline void btrfs_item_key(struct extent_buffer *eb,
1365 struct btrfs_disk_key *disk_key, int nr)
1367 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1368 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1371 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1372 struct btrfs_disk_key *disk_key, int nr)
1374 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1375 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1378 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1381 * struct btrfs_root_ref
1383 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1384 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1385 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1387 /* struct btrfs_dir_item */
1388 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1389 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1390 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1391 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1393 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1394 struct btrfs_dir_item *item,
1395 struct btrfs_disk_key *key)
1397 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1400 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1401 struct btrfs_dir_item *item,
1402 struct btrfs_disk_key *key)
1404 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1407 /* struct btrfs_disk_key */
1408 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1410 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1411 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1413 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1414 struct btrfs_disk_key *disk)
1416 cpu->offset = le64_to_cpu(disk->offset);
1417 cpu->type = disk->type;
1418 cpu->objectid = le64_to_cpu(disk->objectid);
1421 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1422 struct btrfs_key *cpu)
1424 disk->offset = cpu_to_le64(cpu->offset);
1425 disk->type = cpu->type;
1426 disk->objectid = cpu_to_le64(cpu->objectid);
1429 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1430 struct btrfs_key *key, int nr)
1432 struct btrfs_disk_key disk_key;
1433 btrfs_node_key(eb, &disk_key, nr);
1434 btrfs_disk_key_to_cpu(key, &disk_key);
1437 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1438 struct btrfs_key *key, int nr)
1440 struct btrfs_disk_key disk_key;
1441 btrfs_item_key(eb, &disk_key, nr);
1442 btrfs_disk_key_to_cpu(key, &disk_key);
1445 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1446 struct btrfs_dir_item *item,
1447 struct btrfs_key *key)
1449 struct btrfs_disk_key disk_key;
1450 btrfs_dir_item_key(eb, item, &disk_key);
1451 btrfs_disk_key_to_cpu(key, &disk_key);
1455 static inline u8 btrfs_key_type(struct btrfs_key *key)
1460 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1465 /* struct btrfs_header */
1466 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1467 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1469 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1470 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1471 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1472 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1474 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1476 return (btrfs_header_flags(eb) & flag) == flag;
1479 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1481 u64 flags = btrfs_header_flags(eb);
1482 btrfs_set_header_flags(eb, flags | flag);
1483 return (flags & flag) == flag;
1486 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1488 u64 flags = btrfs_header_flags(eb);
1489 btrfs_set_header_flags(eb, flags & ~flag);
1490 return (flags & flag) == flag;
1493 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1495 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1499 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1501 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1505 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1507 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1511 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1513 unsigned long ptr = offsetof(struct btrfs_header, csum);
1517 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1522 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1527 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1532 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1534 return btrfs_header_level(eb) == 0;
1537 /* struct btrfs_root_item */
1538 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1540 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1541 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1542 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1544 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1546 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1547 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1548 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1549 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1550 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1551 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1552 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1553 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1556 /* struct btrfs_super_block */
1558 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1559 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1560 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1562 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1563 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1564 struct btrfs_super_block, sys_chunk_array_size, 32);
1565 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1566 struct btrfs_super_block, chunk_root_generation, 64);
1567 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1569 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1571 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1572 chunk_root_level, 8);
1573 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1575 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1576 log_root_transid, 64);
1577 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1579 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1581 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1583 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1585 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1587 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1589 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1591 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1592 root_dir_objectid, 64);
1593 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1595 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1597 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1599 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1600 incompat_flags, 64);
1601 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1604 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1606 int t = btrfs_super_csum_type(s);
1607 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1608 return btrfs_csum_sizes[t];
1611 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1613 return offsetof(struct btrfs_leaf, items);
1616 /* struct btrfs_file_extent_item */
1617 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1619 static inline unsigned long
1620 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
1622 unsigned long offset = (unsigned long)e;
1623 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1627 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1629 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1632 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1634 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1636 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1637 disk_num_bytes, 64);
1638 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1640 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1642 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1644 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1646 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1648 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1649 other_encoding, 16);
1651 /* this returns the number of file bytes represented by the inline item.
1652 * If an item is compressed, this is the uncompressed size
1654 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1655 struct btrfs_file_extent_item *e)
1657 return btrfs_file_extent_ram_bytes(eb, e);
1661 * this returns the number of bytes used by the item on disk, minus the
1662 * size of any extent headers. If a file is compressed on disk, this is
1663 * the compressed size
1665 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1666 struct btrfs_item *e)
1668 unsigned long offset;
1669 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1670 return btrfs_item_size(eb, e) - offset;
1673 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1675 return sb->s_fs_info;
1678 static inline int btrfs_set_root_name(struct btrfs_root *root,
1679 const char *name, int len)
1681 /* if we already have a name just free it */
1684 root->name = kmalloc(len+1, GFP_KERNEL);
1688 memcpy(root->name, name, len);
1689 root->name[len] = '\0';
1694 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
1697 return root->leafsize;
1698 return root->nodesize;
1701 /* helper function to cast into the data area of the leaf. */
1702 #define btrfs_item_ptr(leaf, slot, type) \
1703 ((type *)(btrfs_leaf_data(leaf) + \
1704 btrfs_item_offset_nr(leaf, slot)))
1706 #define btrfs_item_ptr_offset(leaf, slot) \
1707 ((unsigned long)(btrfs_leaf_data(leaf) + \
1708 btrfs_item_offset_nr(leaf, slot)))
1710 static inline struct dentry *fdentry(struct file *file)
1712 return file->f_path.dentry;
1716 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
1717 struct btrfs_root *root, unsigned long count);
1718 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1719 int btrfs_update_pinned_extents(struct btrfs_root *root,
1720 u64 bytenr, u64 num, int pin);
1721 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1722 struct btrfs_root *root, struct extent_buffer *leaf);
1723 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1724 struct btrfs_root *root, u64 objectid, u64 bytenr);
1725 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1726 struct btrfs_block_group_cache *btrfs_lookup_block_group(
1727 struct btrfs_fs_info *info,
1729 u64 btrfs_find_block_group(struct btrfs_root *root,
1730 u64 search_start, u64 search_hint, int owner);
1731 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1732 struct btrfs_root *root,
1733 u32 blocksize, u64 parent,
1739 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1740 struct btrfs_root *root,
1741 u64 bytenr, u32 blocksize,
1743 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1744 struct btrfs_root *root,
1745 u64 num_bytes, u64 parent, u64 min_bytes,
1746 u64 root_objectid, u64 ref_generation,
1747 u64 owner, u64 empty_size, u64 hint_byte,
1748 u64 search_end, struct btrfs_key *ins, u64 data);
1749 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1750 struct btrfs_root *root, u64 parent,
1751 u64 root_objectid, u64 ref_generation,
1752 u64 owner, struct btrfs_key *ins);
1753 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1754 struct btrfs_root *root, u64 parent,
1755 u64 root_objectid, u64 ref_generation,
1756 u64 owner, struct btrfs_key *ins);
1757 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1758 struct btrfs_root *root,
1759 u64 num_bytes, u64 min_alloc_size,
1760 u64 empty_size, u64 hint_byte,
1761 u64 search_end, struct btrfs_key *ins,
1763 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1764 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1766 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1767 struct extent_buffer *buf, u32 nr_extents);
1768 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1769 struct btrfs_root *root, struct extent_buffer *orig_buf,
1770 struct extent_buffer *buf, int start_slot, int nr);
1771 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1772 struct btrfs_root *root,
1773 u64 bytenr, u64 num_bytes, u64 parent,
1774 u64 root_objectid, u64 ref_generation,
1775 u64 owner_objectid, int pin);
1776 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1777 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1778 struct btrfs_root *root,
1779 struct extent_io_tree *unpin);
1780 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1781 struct btrfs_root *root,
1782 u64 bytenr, u64 num_bytes, u64 parent,
1783 u64 root_objectid, u64 ref_generation,
1784 u64 owner_objectid);
1785 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1786 struct btrfs_root *root, u64 bytenr, u64 num_bytes,
1787 u64 orig_parent, u64 parent,
1788 u64 root_objectid, u64 ref_generation,
1789 u64 owner_objectid);
1790 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1791 struct btrfs_root *root);
1792 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
1793 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1794 int btrfs_read_block_groups(struct btrfs_root *root);
1795 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1796 struct btrfs_root *root, u64 bytes_used,
1797 u64 type, u64 chunk_objectid, u64 chunk_offset,
1799 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1800 struct btrfs_root *root, u64 group_start);
1801 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1802 int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
1803 struct btrfs_root *root);
1804 int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1805 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1806 struct btrfs_root *root,
1807 struct extent_buffer *buf, u64 orig_start);
1808 int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1809 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1810 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
1811 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
1812 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
1813 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
1815 int btrfs_check_metadata_free_space(struct btrfs_root *root);
1816 int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
1818 void btrfs_free_reserved_data_space(struct btrfs_root *root,
1819 struct inode *inode, u64 bytes);
1820 void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode,
1822 void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode,
1825 int btrfs_previous_item(struct btrfs_root *root,
1826 struct btrfs_path *path, u64 min_objectid,
1828 int btrfs_merge_path(struct btrfs_trans_handle *trans,
1829 struct btrfs_root *root,
1830 struct btrfs_key *node_keys,
1831 u64 *nodes, int lowest_level);
1832 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1833 struct btrfs_root *root, struct btrfs_path *path,
1834 struct btrfs_key *new_key);
1835 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1836 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1837 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1838 struct btrfs_key *key, int lowest_level,
1839 int cache_only, u64 min_trans);
1840 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1841 struct btrfs_key *max_key,
1842 struct btrfs_path *path, int cache_only,
1844 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1845 struct btrfs_root *root, struct extent_buffer *buf,
1846 struct extent_buffer *parent, int parent_slot,
1847 struct extent_buffer **cow_ret);
1848 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1849 struct btrfs_root *root,
1850 struct extent_buffer *buf,
1851 struct extent_buffer **cow_ret, u64 new_root_objectid);
1852 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1853 *root, struct btrfs_path *path, u32 data_size);
1854 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1855 struct btrfs_root *root,
1856 struct btrfs_path *path,
1857 u32 new_size, int from_end);
1858 int btrfs_split_item(struct btrfs_trans_handle *trans,
1859 struct btrfs_root *root,
1860 struct btrfs_path *path,
1861 struct btrfs_key *new_key,
1862 unsigned long split_offset);
1863 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1864 *root, struct btrfs_key *key, struct btrfs_path *p, int
1866 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1867 struct btrfs_root *root, struct extent_buffer *parent,
1868 int start_slot, int cache_only, u64 *last_ret,
1869 struct btrfs_key *progress);
1870 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1871 struct btrfs_path *btrfs_alloc_path(void);
1872 void btrfs_free_path(struct btrfs_path *p);
1873 void btrfs_set_path_blocking(struct btrfs_path *p);
1874 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
1876 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1877 struct btrfs_path *path, int slot, int nr);
1878 int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1879 struct btrfs_root *root,
1880 struct btrfs_path *path, u64 bytenr);
1881 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1882 struct btrfs_root *root,
1883 struct btrfs_path *path)
1885 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1888 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1889 *root, struct btrfs_key *key, void *data, u32 data_size);
1890 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
1891 struct btrfs_root *root,
1892 struct btrfs_path *path,
1893 struct btrfs_key *cpu_key, u32 *data_size,
1895 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1896 struct btrfs_root *root,
1897 struct btrfs_path *path,
1898 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1900 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1901 struct btrfs_root *root,
1902 struct btrfs_path *path,
1903 struct btrfs_key *key,
1906 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1909 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1910 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1911 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1912 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1914 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
1915 struct btrfs_root *root,
1916 struct extent_buffer *node,
1917 struct extent_buffer *parent);
1919 int btrfs_find_root_ref(struct btrfs_root *tree_root,
1920 struct btrfs_path *path,
1921 u64 root_id, u64 ref_id);
1922 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1923 struct btrfs_root *tree_root,
1924 u64 root_id, u8 type, u64 ref_id,
1925 u64 dirid, u64 sequence,
1926 const char *name, int name_len);
1927 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1928 struct btrfs_key *key);
1929 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1930 *root, struct btrfs_key *key, struct btrfs_root_item
1932 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1933 *root, struct btrfs_key *key, struct btrfs_root_item
1935 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1936 btrfs_root_item *item, struct btrfs_key *key);
1937 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1938 u64 *found_objectid);
1939 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1940 struct btrfs_root *latest_root);
1942 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
1943 struct btrfs_root *root, const char *name,
1944 int name_len, u64 dir,
1945 struct btrfs_key *location, u8 type, u64 index);
1946 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1947 struct btrfs_root *root,
1948 struct btrfs_path *path, u64 dir,
1949 const char *name, int name_len,
1951 struct btrfs_dir_item *
1952 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1953 struct btrfs_root *root,
1954 struct btrfs_path *path, u64 dir,
1955 u64 objectid, const char *name, int name_len,
1957 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1958 struct btrfs_path *path,
1959 const char *name, int name_len);
1960 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1961 struct btrfs_root *root,
1962 struct btrfs_path *path,
1963 struct btrfs_dir_item *di);
1964 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1965 struct btrfs_root *root, const char *name,
1966 u16 name_len, const void *data, u16 data_len,
1968 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1969 struct btrfs_root *root,
1970 struct btrfs_path *path, u64 dir,
1971 const char *name, u16 name_len,
1975 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1976 struct btrfs_root *root, u64 offset);
1977 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1978 struct btrfs_root *root, u64 offset);
1981 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1982 struct btrfs_root *fs_root,
1983 u64 dirid, u64 *objectid);
1984 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1987 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1988 struct btrfs_root *root,
1989 const char *name, int name_len,
1990 u64 inode_objectid, u64 ref_objectid, u64 index);
1991 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1992 struct btrfs_root *root,
1993 const char *name, int name_len,
1994 u64 inode_objectid, u64 ref_objectid, u64 *index);
1995 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1996 struct btrfs_root *root,
1997 struct btrfs_path *path, u64 objectid);
1998 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1999 *root, struct btrfs_path *path,
2000 struct btrfs_key *location, int mod);
2003 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2004 struct btrfs_root *root, u64 bytenr, u64 len);
2005 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2006 struct bio *bio, u32 *dst);
2007 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2008 struct btrfs_root *root,
2009 u64 objectid, u64 pos,
2010 u64 disk_offset, u64 disk_num_bytes,
2011 u64 num_bytes, u64 offset, u64 ram_bytes,
2012 u8 compression, u8 encryption, u16 other_encoding);
2013 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2014 struct btrfs_root *root,
2015 struct btrfs_path *path, u64 objectid,
2016 u64 bytenr, int mod);
2017 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2018 struct btrfs_root *root,
2019 struct btrfs_ordered_sum *sums);
2020 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2021 struct bio *bio, u64 file_start, int contig);
2022 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2023 u64 start, unsigned long len);
2024 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2025 struct btrfs_root *root,
2026 struct btrfs_path *path,
2027 u64 bytenr, int cow);
2028 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2029 struct btrfs_root *root, struct btrfs_path *path,
2031 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2032 u64 end, struct list_head *list);
2035 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2036 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2037 #define ClearPageChecked ClearPageFsMisc
2038 #define SetPageChecked SetPageFsMisc
2039 #define PageChecked PageFsMisc
2042 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2043 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2044 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2045 struct btrfs_root *root,
2046 struct inode *dir, struct inode *inode,
2047 const char *name, int name_len);
2048 int btrfs_add_link(struct btrfs_trans_handle *trans,
2049 struct inode *parent_inode, struct inode *inode,
2050 const char *name, int name_len, int add_backref, u64 index);
2051 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2052 struct btrfs_root *root,
2053 struct inode *inode, u64 new_size,
2056 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
2057 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
2058 int btrfs_writepages(struct address_space *mapping,
2059 struct writeback_control *wbc);
2060 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2061 struct btrfs_root *new_root, struct dentry *dentry,
2062 u64 new_dirid, u64 alloc_hint);
2063 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2064 size_t size, struct bio *bio, unsigned long bio_flags);
2066 unsigned long btrfs_force_ra(struct address_space *mapping,
2067 struct file_ra_state *ra, struct file *file,
2068 pgoff_t offset, pgoff_t last_index);
2069 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
2070 int btrfs_readpage(struct file *file, struct page *page);
2071 void btrfs_delete_inode(struct inode *inode);
2072 void btrfs_put_inode(struct inode *inode);
2073 void btrfs_read_locked_inode(struct inode *inode);
2074 int btrfs_write_inode(struct inode *inode, int wait);
2075 void btrfs_dirty_inode(struct inode *inode);
2076 struct inode *btrfs_alloc_inode(struct super_block *sb);
2077 void btrfs_destroy_inode(struct inode *inode);
2078 int btrfs_init_cachep(void);
2079 void btrfs_destroy_cachep(void);
2080 long btrfs_ioctl_trans_end(struct file *file);
2081 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
2082 struct btrfs_root *root, int wait);
2083 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
2084 struct btrfs_root *root);
2085 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2086 struct btrfs_root *root, int *is_new);
2087 int btrfs_commit_write(struct file *file, struct page *page,
2088 unsigned from, unsigned to);
2089 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2090 size_t page_offset, u64 start, u64 end,
2092 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2093 struct btrfs_root *root,
2094 struct inode *inode);
2095 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2096 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2097 void btrfs_orphan_cleanup(struct btrfs_root *root);
2098 int btrfs_cont_expand(struct inode *inode, loff_t size);
2101 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2104 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
2105 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2107 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2108 extern struct file_operations btrfs_file_operations;
2109 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2110 struct btrfs_root *root, struct inode *inode,
2111 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
2112 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2113 struct btrfs_root *root,
2114 struct inode *inode, u64 start, u64 end);
2115 int btrfs_release_file(struct inode *inode, struct file *file);
2118 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2119 struct btrfs_root *root, int cache_only);
2122 int btrfs_init_sysfs(void);
2123 void btrfs_exit_sysfs(void);
2124 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2125 int btrfs_sysfs_add_root(struct btrfs_root *root);
2126 void btrfs_sysfs_del_root(struct btrfs_root *root);
2127 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2130 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2133 u64 btrfs_parse_size(char *str);
2134 int btrfs_parse_options(struct btrfs_root *root, char *options);
2135 int btrfs_sync_fs(struct super_block *sb, int wait);
2138 int btrfs_check_acl(struct inode *inode, int mask);
2139 int btrfs_init_acl(struct inode *inode, struct inode *dir);
2140 int btrfs_acl_chmod(struct inode *inode);
2142 /* free-space-cache.c */
2143 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
2144 u64 bytenr, u64 size);
2145 int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group,
2146 u64 offset, u64 bytes);
2147 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
2148 u64 bytenr, u64 size);
2149 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group,
2150 u64 offset, u64 bytes);
2151 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2153 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
2154 *block_group, u64 offset,
2156 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
2158 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);