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 */
409 * set by btrfs_split_item, tells search_slot to keep all locks
410 * and to force calls to keep space in the nodes
412 int search_for_split;
416 * items in the extent btree are used to record the objectid of the
417 * owner of the block and the number of references
419 struct btrfs_extent_item {
421 } __attribute__ ((__packed__));
423 struct btrfs_extent_ref {
428 } __attribute__ ((__packed__));
430 /* dev extents record free space on individual devices. The owner
431 * field points back to the chunk allocation mapping tree that allocated
432 * the extent. The chunk tree uuid field is a way to double check the owner
434 struct btrfs_dev_extent {
436 __le64 chunk_objectid;
439 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
440 } __attribute__ ((__packed__));
442 struct btrfs_inode_ref {
446 } __attribute__ ((__packed__));
448 struct btrfs_timespec {
451 } __attribute__ ((__packed__));
453 enum btrfs_compression_type {
454 BTRFS_COMPRESS_NONE = 0,
455 BTRFS_COMPRESS_ZLIB = 1,
456 BTRFS_COMPRESS_LAST = 2,
459 struct btrfs_inode_item {
460 /* nfs style generation number */
462 /* transid that last touched this inode */
474 /* modification sequence number for NFS */
478 * a little future expansion, for more than this we can
479 * just grow the inode item and version it
482 struct btrfs_timespec atime;
483 struct btrfs_timespec ctime;
484 struct btrfs_timespec mtime;
485 struct btrfs_timespec otime;
486 } __attribute__ ((__packed__));
488 struct btrfs_dir_log_item {
490 } __attribute__ ((__packed__));
492 struct btrfs_dir_item {
493 struct btrfs_disk_key location;
498 } __attribute__ ((__packed__));
500 struct btrfs_root_item {
501 struct btrfs_inode_item inode;
507 __le64 last_snapshot;
510 struct btrfs_disk_key drop_progress;
513 } __attribute__ ((__packed__));
516 * this is used for both forward and backward root refs
518 struct btrfs_root_ref {
522 } __attribute__ ((__packed__));
524 #define BTRFS_FILE_EXTENT_INLINE 0
525 #define BTRFS_FILE_EXTENT_REG 1
526 #define BTRFS_FILE_EXTENT_PREALLOC 2
528 struct btrfs_file_extent_item {
530 * transaction id that created this extent
534 * max number of bytes to hold this extent in ram
535 * when we split a compressed extent we can't know how big
536 * each of the resulting pieces will be. So, this is
537 * an upper limit on the size of the extent in ram instead of
543 * 32 bits for the various ways we might encode the data,
544 * including compression and encryption. If any of these
545 * are set to something a given disk format doesn't understand
546 * it is treated like an incompat flag for reading and writing,
551 __le16 other_encoding; /* spare for later use */
553 /* are we inline data or a real extent? */
557 * disk space consumed by the extent, checksum blocks are included
561 __le64 disk_num_bytes;
563 * the logical offset in file blocks (no csums)
564 * this extent record is for. This allows a file extent to point
565 * into the middle of an existing extent on disk, sharing it
566 * between two snapshots (useful if some bytes in the middle of the
567 * extent have changed
571 * the logical number of file blocks (no csums included). This
572 * always reflects the size uncompressed and without encoding.
576 } __attribute__ ((__packed__));
578 struct btrfs_csum_item {
580 } __attribute__ ((__packed__));
582 /* different types of block groups (and chunks) */
583 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
584 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
585 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
586 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
587 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
588 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
589 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
591 struct btrfs_block_group_item {
593 __le64 chunk_objectid;
595 } __attribute__ ((__packed__));
597 struct btrfs_space_info {
600 u64 total_bytes; /* total bytes in the space */
601 u64 bytes_used; /* total bytes used on disk */
602 u64 bytes_pinned; /* total bytes pinned, will be freed when the
603 transaction finishes */
604 u64 bytes_reserved; /* total bytes the allocator has reserved for
605 current allocations */
606 u64 bytes_readonly; /* total bytes that are read only */
608 /* delalloc accounting */
609 u64 bytes_delalloc; /* number of bytes reserved for allocation,
610 this space is not necessarily reserved yet
612 u64 bytes_may_use; /* number of bytes that may be used for
615 int full; /* indicates that we cannot allocate any more
616 chunks for this space */
617 int force_alloc; /* set if we need to force a chunk alloc for
620 struct list_head list;
622 /* for block groups in our same type */
623 struct list_head block_groups;
625 struct rw_semaphore groups_sem;
628 struct btrfs_free_space {
629 struct rb_node bytes_index;
630 struct rb_node offset_index;
635 struct btrfs_block_group_cache {
636 struct btrfs_key key;
637 struct btrfs_block_group_item item;
639 struct mutex alloc_mutex;
640 struct mutex cache_mutex;
648 struct btrfs_space_info *space_info;
650 /* free space cache stuff */
651 struct rb_root free_space_bytes;
652 struct rb_root free_space_offset;
654 /* block group cache stuff */
655 struct rb_node cache_node;
657 /* for block groups in the same raid type */
658 struct list_head list;
664 struct btrfs_leaf_ref_tree {
666 struct list_head list;
671 struct btrfs_fs_devices;
672 struct btrfs_fs_info {
673 u8 fsid[BTRFS_FSID_SIZE];
674 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
675 struct btrfs_root *extent_root;
676 struct btrfs_root *tree_root;
677 struct btrfs_root *chunk_root;
678 struct btrfs_root *dev_root;
679 struct btrfs_root *fs_root;
680 struct btrfs_root *csum_root;
682 /* the log root tree is a directory of all the other log roots */
683 struct btrfs_root *log_root_tree;
684 struct radix_tree_root fs_roots_radix;
686 /* block group cache stuff */
687 spinlock_t block_group_cache_lock;
688 struct rb_root block_group_cache_tree;
690 struct extent_io_tree pinned_extents;
692 /* logical->physical extent mapping */
693 struct btrfs_mapping_tree mapping_tree;
696 u64 last_trans_committed;
697 u64 last_trans_new_blockgroup;
698 u64 open_ioctl_trans;
699 unsigned long mount_opt;
703 struct btrfs_transaction *running_transaction;
704 wait_queue_head_t transaction_throttle;
705 wait_queue_head_t transaction_wait;
706 wait_queue_head_t async_submit_wait;
708 struct btrfs_super_block super_copy;
709 struct btrfs_super_block super_for_commit;
710 struct block_device *__bdev;
711 struct super_block *sb;
712 struct inode *btree_inode;
713 struct backing_dev_info bdi;
714 struct mutex trans_mutex;
715 struct mutex tree_log_mutex;
716 struct mutex transaction_kthread_mutex;
717 struct mutex cleaner_mutex;
718 struct mutex pinned_mutex;
719 struct mutex chunk_mutex;
720 struct mutex drop_mutex;
721 struct mutex volume_mutex;
722 struct mutex tree_reloc_mutex;
723 struct list_head trans_list;
724 struct list_head hashers;
725 struct list_head dead_roots;
727 atomic_t nr_async_submits;
728 atomic_t async_submit_draining;
729 atomic_t nr_async_bios;
730 atomic_t async_delalloc_pages;
733 * this is used by the balancing code to wait for all the pending
736 spinlock_t ordered_extent_lock;
737 struct list_head ordered_extents;
738 struct list_head delalloc_inodes;
741 * there is a pool of worker threads for checksumming during writes
742 * and a pool for checksumming after reads. This is because readers
743 * can run with FS locks held, and the writers may be waiting for
744 * those locks. We don't want ordering in the pending list to cause
745 * deadlocks, and so the two are serviced separately.
747 * A third pool does submit_bio to avoid deadlocking with the other
750 struct btrfs_workers workers;
751 struct btrfs_workers delalloc_workers;
752 struct btrfs_workers endio_workers;
753 struct btrfs_workers endio_meta_workers;
754 struct btrfs_workers endio_meta_write_workers;
755 struct btrfs_workers endio_write_workers;
756 struct btrfs_workers submit_workers;
758 * fixup workers take dirty pages that didn't properly go through
759 * the cow mechanism and make them safe to write. It happens
760 * for the sys_munmap function call path
762 struct btrfs_workers fixup_workers;
763 struct task_struct *transaction_kthread;
764 struct task_struct *cleaner_kthread;
765 int thread_pool_size;
767 /* tree relocation relocated fields */
768 struct list_head dead_reloc_roots;
769 struct btrfs_leaf_ref_tree reloc_ref_tree;
770 struct btrfs_leaf_ref_tree shared_ref_tree;
772 struct kobject super_kobj;
773 struct completion kobj_unregister;
776 int log_root_recovering;
778 atomic_t throttle_gen;
781 struct list_head dirty_cowonly_roots;
783 struct btrfs_fs_devices *fs_devices;
786 * the space_info list is almost entirely read only. It only changes
787 * when we add a new raid type to the FS, and that happens
788 * very rarely. RCU is used to protect it.
790 struct list_head space_info;
792 spinlock_t delalloc_lock;
793 spinlock_t new_trans_lock;
798 spinlock_t ref_cache_lock;
799 u64 total_ref_cache_size;
801 u64 avail_data_alloc_bits;
802 u64 avail_metadata_alloc_bits;
803 u64 avail_system_alloc_bits;
804 u64 data_alloc_profile;
805 u64 metadata_alloc_profile;
806 u64 system_alloc_profile;
812 * in ram representation of the tree. extent_root is used for all allocations
813 * and for the extent tree extent_root root.
815 struct btrfs_dirty_root;
817 struct extent_buffer *node;
819 /* the node lock is held while changing the node pointer */
820 spinlock_t node_lock;
822 struct extent_buffer *commit_root;
823 struct btrfs_leaf_ref_tree *ref_tree;
824 struct btrfs_leaf_ref_tree ref_tree_struct;
825 struct btrfs_dirty_root *dirty_root;
826 struct btrfs_root *log_root;
827 struct btrfs_root *reloc_root;
829 struct btrfs_root_item root_item;
830 struct btrfs_key root_key;
831 struct btrfs_fs_info *fs_info;
832 struct extent_io_tree dirty_log_pages;
834 struct kobject root_kobj;
835 struct completion kobj_unregister;
836 struct mutex objectid_mutex;
838 struct mutex log_mutex;
839 wait_queue_head_t log_writer_wait;
840 wait_queue_head_t log_commit_wait[2];
841 atomic_t log_writers;
842 atomic_t log_commit[2];
843 unsigned long log_transid;
844 unsigned long log_batch;
849 /* data allocations are done in sectorsize units */
852 /* node allocations are done in nodesize units */
855 /* leaf allocations are done in leafsize units */
862 u64 last_inode_alloc;
865 u64 defrag_trans_start;
866 struct btrfs_key defrag_progress;
867 struct btrfs_key defrag_max;
873 /* the dirty list is only used by non-reference counted roots */
874 struct list_head dirty_list;
876 spinlock_t list_lock;
877 struct list_head dead_list;
878 struct list_head orphan_list;
881 * right now this just gets used so that a root has its own devid
882 * for stat. It may be used for more later
884 struct super_block anon_super;
889 * inode items have the data typically returned from stat and store other
890 * info about object characteristics. There is one for every file and dir in
893 #define BTRFS_INODE_ITEM_KEY 1
894 #define BTRFS_INODE_REF_KEY 12
895 #define BTRFS_XATTR_ITEM_KEY 24
896 #define BTRFS_ORPHAN_ITEM_KEY 48
897 /* reserve 2-15 close to the inode for later flexibility */
900 * dir items are the name -> inode pointers in a directory. There is one
901 * for every name in a directory.
903 #define BTRFS_DIR_LOG_ITEM_KEY 60
904 #define BTRFS_DIR_LOG_INDEX_KEY 72
905 #define BTRFS_DIR_ITEM_KEY 84
906 #define BTRFS_DIR_INDEX_KEY 96
908 * extent data is for file data
910 #define BTRFS_EXTENT_DATA_KEY 108
913 * extent csums are stored in a separate tree and hold csums for
914 * an entire extent on disk.
916 #define BTRFS_EXTENT_CSUM_KEY 128
919 * root items point to tree roots. There are typically in the root
920 * tree used by the super block to find all the other trees
922 #define BTRFS_ROOT_ITEM_KEY 132
925 * root backrefs tie subvols and snapshots to the directory entries that
928 #define BTRFS_ROOT_BACKREF_KEY 144
931 * root refs make a fast index for listing all of the snapshots and
932 * subvolumes referenced by a given root. They point directly to the
933 * directory item in the root that references the subvol
935 #define BTRFS_ROOT_REF_KEY 156
938 * extent items are in the extent map tree. These record which blocks
939 * are used, and how many references there are to each block
941 #define BTRFS_EXTENT_ITEM_KEY 168
942 #define BTRFS_EXTENT_REF_KEY 180
945 * block groups give us hints into the extent allocation trees. Which
946 * blocks are free etc etc
948 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
950 #define BTRFS_DEV_EXTENT_KEY 204
951 #define BTRFS_DEV_ITEM_KEY 216
952 #define BTRFS_CHUNK_ITEM_KEY 228
955 * string items are for debugging. They just store a short string of
958 #define BTRFS_STRING_ITEM_KEY 253
960 #define BTRFS_MOUNT_NODATASUM (1 << 0)
961 #define BTRFS_MOUNT_NODATACOW (1 << 1)
962 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
963 #define BTRFS_MOUNT_SSD (1 << 3)
964 #define BTRFS_MOUNT_DEGRADED (1 << 4)
965 #define BTRFS_MOUNT_COMPRESS (1 << 5)
967 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
968 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
969 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
974 #define BTRFS_INODE_NODATASUM (1 << 0)
975 #define BTRFS_INODE_NODATACOW (1 << 1)
976 #define BTRFS_INODE_READONLY (1 << 2)
977 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
978 #define BTRFS_INODE_PREALLOC (1 << 4)
979 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
981 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
983 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
985 /* some macros to generate set/get funcs for the struct fields. This
986 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
989 #define le8_to_cpu(v) (v)
990 #define cpu_to_le8(v) (v)
993 #define read_eb_member(eb, ptr, type, member, result) ( \
994 read_extent_buffer(eb, (char *)(result), \
995 ((unsigned long)(ptr)) + \
996 offsetof(type, member), \
997 sizeof(((type *)0)->member)))
999 #define write_eb_member(eb, ptr, type, member, result) ( \
1000 write_extent_buffer(eb, (char *)(result), \
1001 ((unsigned long)(ptr)) + \
1002 offsetof(type, member), \
1003 sizeof(((type *)0)->member)))
1005 #ifndef BTRFS_SETGET_FUNCS
1006 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1007 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1008 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1011 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1012 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1014 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1015 u##bits res = le##bits##_to_cpu(p->member); \
1016 kunmap_atomic(p, KM_USER0); \
1019 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1022 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1023 p->member = cpu_to_le##bits(val); \
1024 kunmap_atomic(p, KM_USER0); \
1027 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1028 static inline u##bits btrfs_##name(type *s) \
1030 return le##bits##_to_cpu(s->member); \
1032 static inline void btrfs_set_##name(type *s, u##bits val) \
1034 s->member = cpu_to_le##bits(val); \
1037 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1038 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1039 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1040 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1041 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1042 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1044 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1045 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1046 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1047 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1048 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1049 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1051 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1052 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1054 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1056 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1058 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1060 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1062 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1063 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1065 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1067 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1069 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1072 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1074 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1077 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1079 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1082 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1083 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1084 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1085 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1086 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1087 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1088 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1089 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1090 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1091 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1092 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1094 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1096 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1099 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1100 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1101 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1103 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1105 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1107 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1109 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1110 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1112 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1114 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1115 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1117 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1120 unsigned long offset = (unsigned long)c;
1121 offset += offsetof(struct btrfs_chunk, stripe);
1122 offset += nr * sizeof(struct btrfs_stripe);
1123 return (struct btrfs_stripe *)offset;
1126 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1128 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1131 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1132 struct btrfs_chunk *c, int nr)
1134 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1137 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1138 struct btrfs_chunk *c, int nr,
1141 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1144 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1145 struct btrfs_chunk *c, int nr)
1147 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1150 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1151 struct btrfs_chunk *c, int nr,
1154 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1157 /* struct btrfs_block_group_item */
1158 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1160 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1162 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1163 struct btrfs_block_group_item, chunk_objectid, 64);
1165 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1166 struct btrfs_block_group_item, chunk_objectid, 64);
1167 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1168 struct btrfs_block_group_item, flags, 64);
1169 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1170 struct btrfs_block_group_item, flags, 64);
1172 /* struct btrfs_inode_ref */
1173 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1174 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1176 /* struct btrfs_inode_item */
1177 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1178 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1179 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1180 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1181 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1182 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1183 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1184 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1185 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1186 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1187 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1188 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1190 static inline struct btrfs_timespec *
1191 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1193 unsigned long ptr = (unsigned long)inode_item;
1194 ptr += offsetof(struct btrfs_inode_item, atime);
1195 return (struct btrfs_timespec *)ptr;
1198 static inline struct btrfs_timespec *
1199 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1201 unsigned long ptr = (unsigned long)inode_item;
1202 ptr += offsetof(struct btrfs_inode_item, mtime);
1203 return (struct btrfs_timespec *)ptr;
1206 static inline struct btrfs_timespec *
1207 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1209 unsigned long ptr = (unsigned long)inode_item;
1210 ptr += offsetof(struct btrfs_inode_item, ctime);
1211 return (struct btrfs_timespec *)ptr;
1214 static inline struct btrfs_timespec *
1215 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1217 unsigned long ptr = (unsigned long)inode_item;
1218 ptr += offsetof(struct btrfs_inode_item, otime);
1219 return (struct btrfs_timespec *)ptr;
1222 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1223 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1225 /* struct btrfs_dev_extent */
1226 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1228 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1229 chunk_objectid, 64);
1230 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1232 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1234 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1236 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1237 return (u8 *)((unsigned long)dev + ptr);
1240 /* struct btrfs_extent_ref */
1241 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1242 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1243 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1244 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1246 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1247 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1249 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1251 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1254 /* struct btrfs_extent_item */
1255 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1256 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1259 /* struct btrfs_node */
1260 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1261 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1263 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1266 ptr = offsetof(struct btrfs_node, ptrs) +
1267 sizeof(struct btrfs_key_ptr) * nr;
1268 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1271 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1275 ptr = offsetof(struct btrfs_node, ptrs) +
1276 sizeof(struct btrfs_key_ptr) * nr;
1277 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1280 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1283 ptr = offsetof(struct btrfs_node, ptrs) +
1284 sizeof(struct btrfs_key_ptr) * nr;
1285 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1288 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1292 ptr = offsetof(struct btrfs_node, ptrs) +
1293 sizeof(struct btrfs_key_ptr) * nr;
1294 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1297 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1299 return offsetof(struct btrfs_node, ptrs) +
1300 sizeof(struct btrfs_key_ptr) * nr;
1303 void btrfs_node_key(struct extent_buffer *eb,
1304 struct btrfs_disk_key *disk_key, int nr);
1306 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1307 struct btrfs_disk_key *disk_key, int nr)
1310 ptr = btrfs_node_key_ptr_offset(nr);
1311 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1312 struct btrfs_key_ptr, key, disk_key);
1315 /* struct btrfs_item */
1316 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1317 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1319 static inline unsigned long btrfs_item_nr_offset(int nr)
1321 return offsetof(struct btrfs_leaf, items) +
1322 sizeof(struct btrfs_item) * nr;
1325 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1328 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1331 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1332 struct btrfs_item *item)
1334 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1337 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1339 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1342 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1344 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1347 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1349 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1352 static inline void btrfs_item_key(struct extent_buffer *eb,
1353 struct btrfs_disk_key *disk_key, int nr)
1355 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1356 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1359 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1360 struct btrfs_disk_key *disk_key, int nr)
1362 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1363 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1366 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1369 * struct btrfs_root_ref
1371 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1372 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1373 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1375 /* struct btrfs_dir_item */
1376 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1377 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1378 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1379 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1381 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1382 struct btrfs_dir_item *item,
1383 struct btrfs_disk_key *key)
1385 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1388 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1389 struct btrfs_dir_item *item,
1390 struct btrfs_disk_key *key)
1392 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1395 /* struct btrfs_disk_key */
1396 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1398 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1399 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1401 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1402 struct btrfs_disk_key *disk)
1404 cpu->offset = le64_to_cpu(disk->offset);
1405 cpu->type = disk->type;
1406 cpu->objectid = le64_to_cpu(disk->objectid);
1409 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1410 struct btrfs_key *cpu)
1412 disk->offset = cpu_to_le64(cpu->offset);
1413 disk->type = cpu->type;
1414 disk->objectid = cpu_to_le64(cpu->objectid);
1417 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1418 struct btrfs_key *key, int nr)
1420 struct btrfs_disk_key disk_key;
1421 btrfs_node_key(eb, &disk_key, nr);
1422 btrfs_disk_key_to_cpu(key, &disk_key);
1425 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1426 struct btrfs_key *key, int nr)
1428 struct btrfs_disk_key disk_key;
1429 btrfs_item_key(eb, &disk_key, nr);
1430 btrfs_disk_key_to_cpu(key, &disk_key);
1433 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1434 struct btrfs_dir_item *item,
1435 struct btrfs_key *key)
1437 struct btrfs_disk_key disk_key;
1438 btrfs_dir_item_key(eb, item, &disk_key);
1439 btrfs_disk_key_to_cpu(key, &disk_key);
1443 static inline u8 btrfs_key_type(struct btrfs_key *key)
1448 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1453 /* struct btrfs_header */
1454 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1455 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1457 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1458 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1459 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1460 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1462 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1464 return (btrfs_header_flags(eb) & flag) == flag;
1467 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1469 u64 flags = btrfs_header_flags(eb);
1470 btrfs_set_header_flags(eb, flags | flag);
1471 return (flags & flag) == flag;
1474 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1476 u64 flags = btrfs_header_flags(eb);
1477 btrfs_set_header_flags(eb, flags & ~flag);
1478 return (flags & flag) == flag;
1481 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1483 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1487 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1489 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1493 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1495 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1499 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1501 unsigned long ptr = offsetof(struct btrfs_header, csum);
1505 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1510 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1515 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1520 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1522 return btrfs_header_level(eb) == 0;
1525 /* struct btrfs_root_item */
1526 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1528 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1529 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1530 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1532 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1534 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1535 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1536 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1537 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1538 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1539 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1540 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1541 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1544 /* struct btrfs_super_block */
1546 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1547 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1548 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1550 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1551 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1552 struct btrfs_super_block, sys_chunk_array_size, 32);
1553 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1554 struct btrfs_super_block, chunk_root_generation, 64);
1555 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1557 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1559 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1560 chunk_root_level, 8);
1561 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1563 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1564 log_root_transid, 64);
1565 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1567 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1569 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1571 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1573 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1575 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1577 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1579 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1580 root_dir_objectid, 64);
1581 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1583 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1585 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1587 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1588 incompat_flags, 64);
1589 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1592 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1594 int t = btrfs_super_csum_type(s);
1595 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1596 return btrfs_csum_sizes[t];
1599 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1601 return offsetof(struct btrfs_leaf, items);
1604 /* struct btrfs_file_extent_item */
1605 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1607 static inline unsigned long
1608 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
1610 unsigned long offset = (unsigned long)e;
1611 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1615 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1617 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1620 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1622 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1624 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1625 disk_num_bytes, 64);
1626 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1628 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1630 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1632 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1634 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1636 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1637 other_encoding, 16);
1639 /* this returns the number of file bytes represented by the inline item.
1640 * If an item is compressed, this is the uncompressed size
1642 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1643 struct btrfs_file_extent_item *e)
1645 return btrfs_file_extent_ram_bytes(eb, e);
1649 * this returns the number of bytes used by the item on disk, minus the
1650 * size of any extent headers. If a file is compressed on disk, this is
1651 * the compressed size
1653 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1654 struct btrfs_item *e)
1656 unsigned long offset;
1657 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1658 return btrfs_item_size(eb, e) - offset;
1661 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1663 return sb->s_fs_info;
1666 static inline int btrfs_set_root_name(struct btrfs_root *root,
1667 const char *name, int len)
1669 /* if we already have a name just free it */
1672 root->name = kmalloc(len+1, GFP_KERNEL);
1676 memcpy(root->name, name, len);
1677 root->name[len] = '\0';
1682 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
1685 return root->leafsize;
1686 return root->nodesize;
1689 /* helper function to cast into the data area of the leaf. */
1690 #define btrfs_item_ptr(leaf, slot, type) \
1691 ((type *)(btrfs_leaf_data(leaf) + \
1692 btrfs_item_offset_nr(leaf, slot)))
1694 #define btrfs_item_ptr_offset(leaf, slot) \
1695 ((unsigned long)(btrfs_leaf_data(leaf) + \
1696 btrfs_item_offset_nr(leaf, slot)))
1698 static inline struct dentry *fdentry(struct file *file)
1700 return file->f_path.dentry;
1704 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
1705 struct btrfs_root *root, unsigned long count);
1706 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1707 int btrfs_update_pinned_extents(struct btrfs_root *root,
1708 u64 bytenr, u64 num, int pin);
1709 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1710 struct btrfs_root *root, struct extent_buffer *leaf);
1711 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1712 struct btrfs_root *root, u64 objectid, u64 bytenr);
1713 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1714 struct btrfs_block_group_cache *btrfs_lookup_block_group(
1715 struct btrfs_fs_info *info,
1717 u64 btrfs_find_block_group(struct btrfs_root *root,
1718 u64 search_start, u64 search_hint, int owner);
1719 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1720 struct btrfs_root *root,
1721 u32 blocksize, u64 parent,
1727 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1728 struct btrfs_root *root,
1729 u64 bytenr, u32 blocksize,
1731 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1732 struct btrfs_root *root,
1733 u64 num_bytes, u64 parent, u64 min_bytes,
1734 u64 root_objectid, u64 ref_generation,
1735 u64 owner, u64 empty_size, u64 hint_byte,
1736 u64 search_end, struct btrfs_key *ins, u64 data);
1737 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1738 struct btrfs_root *root, u64 parent,
1739 u64 root_objectid, u64 ref_generation,
1740 u64 owner, struct btrfs_key *ins);
1741 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1742 struct btrfs_root *root, u64 parent,
1743 u64 root_objectid, u64 ref_generation,
1744 u64 owner, struct btrfs_key *ins);
1745 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1746 struct btrfs_root *root,
1747 u64 num_bytes, u64 min_alloc_size,
1748 u64 empty_size, u64 hint_byte,
1749 u64 search_end, struct btrfs_key *ins,
1751 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1752 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1754 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1755 struct extent_buffer *buf, u32 nr_extents);
1756 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1757 struct btrfs_root *root, struct extent_buffer *orig_buf,
1758 struct extent_buffer *buf, int start_slot, int nr);
1759 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1760 struct btrfs_root *root,
1761 u64 bytenr, u64 num_bytes, u64 parent,
1762 u64 root_objectid, u64 ref_generation,
1763 u64 owner_objectid, int pin);
1764 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1765 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1766 struct btrfs_root *root,
1767 struct extent_io_tree *unpin);
1768 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1769 struct btrfs_root *root,
1770 u64 bytenr, u64 num_bytes, u64 parent,
1771 u64 root_objectid, u64 ref_generation,
1772 u64 owner_objectid);
1773 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1774 struct btrfs_root *root, u64 bytenr, u64 num_bytes,
1775 u64 orig_parent, u64 parent,
1776 u64 root_objectid, u64 ref_generation,
1777 u64 owner_objectid);
1778 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1779 struct btrfs_root *root);
1780 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
1781 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1782 int btrfs_read_block_groups(struct btrfs_root *root);
1783 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1784 struct btrfs_root *root, u64 bytes_used,
1785 u64 type, u64 chunk_objectid, u64 chunk_offset,
1787 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1788 struct btrfs_root *root, u64 group_start);
1789 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1790 int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
1791 struct btrfs_root *root);
1792 int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1793 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1794 struct btrfs_root *root,
1795 struct extent_buffer *buf, u64 orig_start);
1796 int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1797 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1798 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
1799 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
1800 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
1801 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
1803 int btrfs_check_metadata_free_space(struct btrfs_root *root);
1804 int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
1806 void btrfs_free_reserved_data_space(struct btrfs_root *root,
1807 struct inode *inode, u64 bytes);
1808 void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode,
1810 void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode,
1813 int btrfs_previous_item(struct btrfs_root *root,
1814 struct btrfs_path *path, u64 min_objectid,
1816 int btrfs_merge_path(struct btrfs_trans_handle *trans,
1817 struct btrfs_root *root,
1818 struct btrfs_key *node_keys,
1819 u64 *nodes, int lowest_level);
1820 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1821 struct btrfs_root *root, struct btrfs_path *path,
1822 struct btrfs_key *new_key);
1823 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1824 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1825 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1826 struct btrfs_key *key, int lowest_level,
1827 int cache_only, u64 min_trans);
1828 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1829 struct btrfs_key *max_key,
1830 struct btrfs_path *path, int cache_only,
1832 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1833 struct btrfs_root *root, struct extent_buffer *buf,
1834 struct extent_buffer *parent, int parent_slot,
1835 struct extent_buffer **cow_ret);
1836 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1837 struct btrfs_root *root,
1838 struct extent_buffer *buf,
1839 struct extent_buffer **cow_ret, u64 new_root_objectid);
1840 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1841 *root, struct btrfs_path *path, u32 data_size);
1842 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1843 struct btrfs_root *root,
1844 struct btrfs_path *path,
1845 u32 new_size, int from_end);
1846 int btrfs_split_item(struct btrfs_trans_handle *trans,
1847 struct btrfs_root *root,
1848 struct btrfs_path *path,
1849 struct btrfs_key *new_key,
1850 unsigned long split_offset);
1851 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1852 *root, struct btrfs_key *key, struct btrfs_path *p, int
1854 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1855 struct btrfs_root *root, struct extent_buffer *parent,
1856 int start_slot, int cache_only, u64 *last_ret,
1857 struct btrfs_key *progress);
1858 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1859 struct btrfs_path *btrfs_alloc_path(void);
1860 void btrfs_free_path(struct btrfs_path *p);
1861 void btrfs_set_path_blocking(struct btrfs_path *p);
1862 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
1864 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1865 struct btrfs_path *path, int slot, int nr);
1866 int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1867 struct btrfs_root *root,
1868 struct btrfs_path *path, u64 bytenr);
1869 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1870 struct btrfs_root *root,
1871 struct btrfs_path *path)
1873 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1876 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1877 *root, struct btrfs_key *key, void *data, u32 data_size);
1878 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
1879 struct btrfs_root *root,
1880 struct btrfs_path *path,
1881 struct btrfs_key *cpu_key, u32 *data_size,
1883 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1884 struct btrfs_root *root,
1885 struct btrfs_path *path,
1886 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1888 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1889 struct btrfs_root *root,
1890 struct btrfs_path *path,
1891 struct btrfs_key *key,
1894 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1897 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1898 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1899 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1900 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1902 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
1903 struct btrfs_root *root,
1904 struct extent_buffer *node,
1905 struct extent_buffer *parent);
1907 int btrfs_find_root_ref(struct btrfs_root *tree_root,
1908 struct btrfs_path *path,
1909 u64 root_id, u64 ref_id);
1910 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1911 struct btrfs_root *tree_root,
1912 u64 root_id, u8 type, u64 ref_id,
1913 u64 dirid, u64 sequence,
1914 const char *name, int name_len);
1915 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1916 struct btrfs_key *key);
1917 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1918 *root, struct btrfs_key *key, struct btrfs_root_item
1920 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1921 *root, struct btrfs_key *key, struct btrfs_root_item
1923 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1924 btrfs_root_item *item, struct btrfs_key *key);
1925 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1926 u64 *found_objectid);
1927 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1928 struct btrfs_root *latest_root);
1930 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
1931 struct btrfs_root *root, const char *name,
1932 int name_len, u64 dir,
1933 struct btrfs_key *location, u8 type, u64 index);
1934 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1935 struct btrfs_root *root,
1936 struct btrfs_path *path, u64 dir,
1937 const char *name, int name_len,
1939 struct btrfs_dir_item *
1940 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1941 struct btrfs_root *root,
1942 struct btrfs_path *path, u64 dir,
1943 u64 objectid, const char *name, int name_len,
1945 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1946 struct btrfs_path *path,
1947 const char *name, int name_len);
1948 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1949 struct btrfs_root *root,
1950 struct btrfs_path *path,
1951 struct btrfs_dir_item *di);
1952 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1953 struct btrfs_root *root, const char *name,
1954 u16 name_len, const void *data, u16 data_len,
1956 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1957 struct btrfs_root *root,
1958 struct btrfs_path *path, u64 dir,
1959 const char *name, u16 name_len,
1963 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1964 struct btrfs_root *root, u64 offset);
1965 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1966 struct btrfs_root *root, u64 offset);
1969 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1970 struct btrfs_root *fs_root,
1971 u64 dirid, u64 *objectid);
1972 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1975 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1976 struct btrfs_root *root,
1977 const char *name, int name_len,
1978 u64 inode_objectid, u64 ref_objectid, u64 index);
1979 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1980 struct btrfs_root *root,
1981 const char *name, int name_len,
1982 u64 inode_objectid, u64 ref_objectid, u64 *index);
1983 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1984 struct btrfs_root *root,
1985 struct btrfs_path *path, u64 objectid);
1986 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1987 *root, struct btrfs_path *path,
1988 struct btrfs_key *location, int mod);
1991 int btrfs_del_csums(struct btrfs_trans_handle *trans,
1992 struct btrfs_root *root, u64 bytenr, u64 len);
1993 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1994 struct bio *bio, u32 *dst);
1995 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1996 struct btrfs_root *root,
1997 u64 objectid, u64 pos,
1998 u64 disk_offset, u64 disk_num_bytes,
1999 u64 num_bytes, u64 offset, u64 ram_bytes,
2000 u8 compression, u8 encryption, u16 other_encoding);
2001 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2002 struct btrfs_root *root,
2003 struct btrfs_path *path, u64 objectid,
2004 u64 bytenr, int mod);
2005 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2006 struct btrfs_root *root,
2007 struct btrfs_ordered_sum *sums);
2008 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2009 struct bio *bio, u64 file_start, int contig);
2010 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2011 u64 start, unsigned long len);
2012 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2013 struct btrfs_root *root,
2014 struct btrfs_path *path,
2015 u64 bytenr, int cow);
2016 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2017 struct btrfs_root *root, struct btrfs_path *path,
2019 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2020 u64 end, struct list_head *list);
2023 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2024 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2025 #define ClearPageChecked ClearPageFsMisc
2026 #define SetPageChecked SetPageFsMisc
2027 #define PageChecked PageFsMisc
2030 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2031 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2032 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2033 struct btrfs_root *root,
2034 struct inode *dir, struct inode *inode,
2035 const char *name, int name_len);
2036 int btrfs_add_link(struct btrfs_trans_handle *trans,
2037 struct inode *parent_inode, struct inode *inode,
2038 const char *name, int name_len, int add_backref, u64 index);
2039 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2040 struct btrfs_root *root,
2041 struct inode *inode, u64 new_size,
2044 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
2045 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
2046 int btrfs_writepages(struct address_space *mapping,
2047 struct writeback_control *wbc);
2048 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2049 struct btrfs_root *new_root, struct dentry *dentry,
2050 u64 new_dirid, u64 alloc_hint);
2051 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2052 size_t size, struct bio *bio, unsigned long bio_flags);
2054 unsigned long btrfs_force_ra(struct address_space *mapping,
2055 struct file_ra_state *ra, struct file *file,
2056 pgoff_t offset, pgoff_t last_index);
2057 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
2058 int btrfs_readpage(struct file *file, struct page *page);
2059 void btrfs_delete_inode(struct inode *inode);
2060 void btrfs_put_inode(struct inode *inode);
2061 void btrfs_read_locked_inode(struct inode *inode);
2062 int btrfs_write_inode(struct inode *inode, int wait);
2063 void btrfs_dirty_inode(struct inode *inode);
2064 struct inode *btrfs_alloc_inode(struct super_block *sb);
2065 void btrfs_destroy_inode(struct inode *inode);
2066 int btrfs_init_cachep(void);
2067 void btrfs_destroy_cachep(void);
2068 long btrfs_ioctl_trans_end(struct file *file);
2069 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
2070 struct btrfs_root *root, int wait);
2071 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
2072 struct btrfs_root *root);
2073 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2074 struct btrfs_root *root, int *is_new);
2075 int btrfs_commit_write(struct file *file, struct page *page,
2076 unsigned from, unsigned to);
2077 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2078 size_t page_offset, u64 start, u64 end,
2080 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2081 struct btrfs_root *root,
2082 struct inode *inode);
2083 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2084 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2085 void btrfs_orphan_cleanup(struct btrfs_root *root);
2086 int btrfs_cont_expand(struct inode *inode, loff_t size);
2089 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2092 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
2093 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2095 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2096 extern struct file_operations btrfs_file_operations;
2097 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2098 struct btrfs_root *root, struct inode *inode,
2099 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
2100 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2101 struct btrfs_root *root,
2102 struct inode *inode, u64 start, u64 end);
2103 int btrfs_release_file(struct inode *inode, struct file *file);
2106 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2107 struct btrfs_root *root, int cache_only);
2110 int btrfs_init_sysfs(void);
2111 void btrfs_exit_sysfs(void);
2112 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2113 int btrfs_sysfs_add_root(struct btrfs_root *root);
2114 void btrfs_sysfs_del_root(struct btrfs_root *root);
2115 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2118 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2121 u64 btrfs_parse_size(char *str);
2122 int btrfs_parse_options(struct btrfs_root *root, char *options);
2123 int btrfs_sync_fs(struct super_block *sb, int wait);
2126 int btrfs_check_acl(struct inode *inode, int mask);
2127 int btrfs_init_acl(struct inode *inode, struct inode *dir);
2128 int btrfs_acl_chmod(struct inode *inode);
2130 /* free-space-cache.c */
2131 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
2132 u64 bytenr, u64 size);
2133 int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group,
2134 u64 offset, u64 bytes);
2135 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
2136 u64 bytenr, u64 size);
2137 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group,
2138 u64 offset, u64 bytes);
2139 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2141 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
2142 *block_group, u64 offset,
2144 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
2146 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);