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;
724 struct list_head trans_list;
725 struct list_head hashers;
726 struct list_head dead_roots;
728 atomic_t nr_async_submits;
729 atomic_t async_submit_draining;
730 atomic_t nr_async_bios;
731 atomic_t async_delalloc_pages;
734 * this is used by the balancing code to wait for all the pending
737 spinlock_t ordered_extent_lock;
738 struct list_head ordered_extents;
739 struct list_head delalloc_inodes;
742 * there is a pool of worker threads for checksumming during writes
743 * and a pool for checksumming after reads. This is because readers
744 * can run with FS locks held, and the writers may be waiting for
745 * those locks. We don't want ordering in the pending list to cause
746 * deadlocks, and so the two are serviced separately.
748 * A third pool does submit_bio to avoid deadlocking with the other
751 struct btrfs_workers workers;
752 struct btrfs_workers delalloc_workers;
753 struct btrfs_workers endio_workers;
754 struct btrfs_workers endio_meta_workers;
755 struct btrfs_workers endio_meta_write_workers;
756 struct btrfs_workers endio_write_workers;
757 struct btrfs_workers submit_workers;
759 * fixup workers take dirty pages that didn't properly go through
760 * the cow mechanism and make them safe to write. It happens
761 * for the sys_munmap function call path
763 struct btrfs_workers fixup_workers;
764 struct task_struct *transaction_kthread;
765 struct task_struct *cleaner_kthread;
766 int thread_pool_size;
768 /* tree relocation relocated fields */
769 struct list_head dead_reloc_roots;
770 struct btrfs_leaf_ref_tree reloc_ref_tree;
771 struct btrfs_leaf_ref_tree shared_ref_tree;
773 struct kobject super_kobj;
774 struct completion kobj_unregister;
777 int log_root_recovering;
779 atomic_t throttle_gen;
782 struct list_head dirty_cowonly_roots;
784 struct btrfs_fs_devices *fs_devices;
787 * the space_info list is almost entirely read only. It only changes
788 * when we add a new raid type to the FS, and that happens
789 * very rarely. RCU is used to protect it.
791 struct list_head space_info;
793 spinlock_t delalloc_lock;
794 spinlock_t new_trans_lock;
799 spinlock_t ref_cache_lock;
800 u64 total_ref_cache_size;
802 u64 avail_data_alloc_bits;
803 u64 avail_metadata_alloc_bits;
804 u64 avail_system_alloc_bits;
805 u64 data_alloc_profile;
806 u64 metadata_alloc_profile;
807 u64 system_alloc_profile;
813 * in ram representation of the tree. extent_root is used for all allocations
814 * and for the extent tree extent_root root.
816 struct btrfs_dirty_root;
818 struct extent_buffer *node;
820 /* the node lock is held while changing the node pointer */
821 spinlock_t node_lock;
823 struct extent_buffer *commit_root;
824 struct btrfs_leaf_ref_tree *ref_tree;
825 struct btrfs_leaf_ref_tree ref_tree_struct;
826 struct btrfs_dirty_root *dirty_root;
827 struct btrfs_root *log_root;
828 struct btrfs_root *reloc_root;
830 struct btrfs_root_item root_item;
831 struct btrfs_key root_key;
832 struct btrfs_fs_info *fs_info;
833 struct extent_io_tree dirty_log_pages;
835 struct kobject root_kobj;
836 struct completion kobj_unregister;
837 struct mutex objectid_mutex;
839 struct mutex log_mutex;
840 wait_queue_head_t log_writer_wait;
841 wait_queue_head_t log_commit_wait[2];
842 atomic_t log_writers;
843 atomic_t log_commit[2];
844 unsigned long log_transid;
845 unsigned long log_batch;
850 /* data allocations are done in sectorsize units */
853 /* node allocations are done in nodesize units */
856 /* leaf allocations are done in leafsize units */
863 u64 last_inode_alloc;
866 u64 defrag_trans_start;
867 struct btrfs_key defrag_progress;
868 struct btrfs_key defrag_max;
874 /* the dirty list is only used by non-reference counted roots */
875 struct list_head dirty_list;
877 spinlock_t list_lock;
878 struct list_head dead_list;
879 struct list_head orphan_list;
882 * right now this just gets used so that a root has its own devid
883 * for stat. It may be used for more later
885 struct super_block anon_super;
890 * inode items have the data typically returned from stat and store other
891 * info about object characteristics. There is one for every file and dir in
894 #define BTRFS_INODE_ITEM_KEY 1
895 #define BTRFS_INODE_REF_KEY 12
896 #define BTRFS_XATTR_ITEM_KEY 24
897 #define BTRFS_ORPHAN_ITEM_KEY 48
898 /* reserve 2-15 close to the inode for later flexibility */
901 * dir items are the name -> inode pointers in a directory. There is one
902 * for every name in a directory.
904 #define BTRFS_DIR_LOG_ITEM_KEY 60
905 #define BTRFS_DIR_LOG_INDEX_KEY 72
906 #define BTRFS_DIR_ITEM_KEY 84
907 #define BTRFS_DIR_INDEX_KEY 96
909 * extent data is for file data
911 #define BTRFS_EXTENT_DATA_KEY 108
914 * extent csums are stored in a separate tree and hold csums for
915 * an entire extent on disk.
917 #define BTRFS_EXTENT_CSUM_KEY 128
920 * root items point to tree roots. There are typically in the root
921 * tree used by the super block to find all the other trees
923 #define BTRFS_ROOT_ITEM_KEY 132
926 * root backrefs tie subvols and snapshots to the directory entries that
929 #define BTRFS_ROOT_BACKREF_KEY 144
932 * root refs make a fast index for listing all of the snapshots and
933 * subvolumes referenced by a given root. They point directly to the
934 * directory item in the root that references the subvol
936 #define BTRFS_ROOT_REF_KEY 156
939 * extent items are in the extent map tree. These record which blocks
940 * are used, and how many references there are to each block
942 #define BTRFS_EXTENT_ITEM_KEY 168
943 #define BTRFS_EXTENT_REF_KEY 180
946 * block groups give us hints into the extent allocation trees. Which
947 * blocks are free etc etc
949 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
951 #define BTRFS_DEV_EXTENT_KEY 204
952 #define BTRFS_DEV_ITEM_KEY 216
953 #define BTRFS_CHUNK_ITEM_KEY 228
956 * string items are for debugging. They just store a short string of
959 #define BTRFS_STRING_ITEM_KEY 253
961 #define BTRFS_MOUNT_NODATASUM (1 << 0)
962 #define BTRFS_MOUNT_NODATACOW (1 << 1)
963 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
964 #define BTRFS_MOUNT_SSD (1 << 3)
965 #define BTRFS_MOUNT_DEGRADED (1 << 4)
966 #define BTRFS_MOUNT_COMPRESS (1 << 5)
968 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
969 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
970 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
975 #define BTRFS_INODE_NODATASUM (1 << 0)
976 #define BTRFS_INODE_NODATACOW (1 << 1)
977 #define BTRFS_INODE_READONLY (1 << 2)
978 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
979 #define BTRFS_INODE_PREALLOC (1 << 4)
980 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
982 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
984 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
986 /* some macros to generate set/get funcs for the struct fields. This
987 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
990 #define le8_to_cpu(v) (v)
991 #define cpu_to_le8(v) (v)
994 #define read_eb_member(eb, ptr, type, member, result) ( \
995 read_extent_buffer(eb, (char *)(result), \
996 ((unsigned long)(ptr)) + \
997 offsetof(type, member), \
998 sizeof(((type *)0)->member)))
1000 #define write_eb_member(eb, ptr, type, member, result) ( \
1001 write_extent_buffer(eb, (char *)(result), \
1002 ((unsigned long)(ptr)) + \
1003 offsetof(type, member), \
1004 sizeof(((type *)0)->member)))
1006 #ifndef BTRFS_SETGET_FUNCS
1007 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1008 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1009 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1012 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1013 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1015 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1016 u##bits res = le##bits##_to_cpu(p->member); \
1017 kunmap_atomic(p, KM_USER0); \
1020 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1023 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1024 p->member = cpu_to_le##bits(val); \
1025 kunmap_atomic(p, KM_USER0); \
1028 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1029 static inline u##bits btrfs_##name(type *s) \
1031 return le##bits##_to_cpu(s->member); \
1033 static inline void btrfs_set_##name(type *s, u##bits val) \
1035 s->member = cpu_to_le##bits(val); \
1038 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1039 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1040 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1041 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1042 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1043 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1045 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1046 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1047 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1048 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1049 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1050 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1052 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1053 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1055 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1057 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1059 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1061 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1063 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1064 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1066 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1068 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1070 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1073 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1075 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1078 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1080 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1083 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1084 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1085 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1086 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1087 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1088 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1089 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1090 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1091 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1092 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1093 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1095 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1097 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1100 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1101 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1102 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1104 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1106 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1108 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1110 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1111 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1113 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1115 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1116 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1118 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1121 unsigned long offset = (unsigned long)c;
1122 offset += offsetof(struct btrfs_chunk, stripe);
1123 offset += nr * sizeof(struct btrfs_stripe);
1124 return (struct btrfs_stripe *)offset;
1127 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1129 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1132 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1133 struct btrfs_chunk *c, int nr)
1135 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1138 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1139 struct btrfs_chunk *c, int nr,
1142 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1145 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1146 struct btrfs_chunk *c, int nr)
1148 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1151 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1152 struct btrfs_chunk *c, int nr,
1155 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1158 /* struct btrfs_block_group_item */
1159 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1161 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1163 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1164 struct btrfs_block_group_item, chunk_objectid, 64);
1166 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1167 struct btrfs_block_group_item, chunk_objectid, 64);
1168 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1169 struct btrfs_block_group_item, flags, 64);
1170 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1171 struct btrfs_block_group_item, flags, 64);
1173 /* struct btrfs_inode_ref */
1174 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1175 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1177 /* struct btrfs_inode_item */
1178 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1179 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1180 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1181 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1182 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1183 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1184 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1185 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1186 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1187 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1188 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1189 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1191 static inline struct btrfs_timespec *
1192 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1194 unsigned long ptr = (unsigned long)inode_item;
1195 ptr += offsetof(struct btrfs_inode_item, atime);
1196 return (struct btrfs_timespec *)ptr;
1199 static inline struct btrfs_timespec *
1200 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1202 unsigned long ptr = (unsigned long)inode_item;
1203 ptr += offsetof(struct btrfs_inode_item, mtime);
1204 return (struct btrfs_timespec *)ptr;
1207 static inline struct btrfs_timespec *
1208 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1210 unsigned long ptr = (unsigned long)inode_item;
1211 ptr += offsetof(struct btrfs_inode_item, ctime);
1212 return (struct btrfs_timespec *)ptr;
1215 static inline struct btrfs_timespec *
1216 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1218 unsigned long ptr = (unsigned long)inode_item;
1219 ptr += offsetof(struct btrfs_inode_item, otime);
1220 return (struct btrfs_timespec *)ptr;
1223 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1224 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1226 /* struct btrfs_dev_extent */
1227 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1229 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1230 chunk_objectid, 64);
1231 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1233 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1235 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1237 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1238 return (u8 *)((unsigned long)dev + ptr);
1241 /* struct btrfs_extent_ref */
1242 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1243 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1244 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1245 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1247 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1248 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1250 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1252 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1255 /* struct btrfs_extent_item */
1256 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1257 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1260 /* struct btrfs_node */
1261 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1262 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1264 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1267 ptr = offsetof(struct btrfs_node, ptrs) +
1268 sizeof(struct btrfs_key_ptr) * nr;
1269 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1272 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1276 ptr = offsetof(struct btrfs_node, ptrs) +
1277 sizeof(struct btrfs_key_ptr) * nr;
1278 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1281 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1284 ptr = offsetof(struct btrfs_node, ptrs) +
1285 sizeof(struct btrfs_key_ptr) * nr;
1286 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1289 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1293 ptr = offsetof(struct btrfs_node, ptrs) +
1294 sizeof(struct btrfs_key_ptr) * nr;
1295 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1298 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1300 return offsetof(struct btrfs_node, ptrs) +
1301 sizeof(struct btrfs_key_ptr) * nr;
1304 void btrfs_node_key(struct extent_buffer *eb,
1305 struct btrfs_disk_key *disk_key, int nr);
1307 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1308 struct btrfs_disk_key *disk_key, int nr)
1311 ptr = btrfs_node_key_ptr_offset(nr);
1312 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1313 struct btrfs_key_ptr, key, disk_key);
1316 /* struct btrfs_item */
1317 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1318 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1320 static inline unsigned long btrfs_item_nr_offset(int nr)
1322 return offsetof(struct btrfs_leaf, items) +
1323 sizeof(struct btrfs_item) * nr;
1326 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1329 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1332 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1333 struct btrfs_item *item)
1335 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1338 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1340 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1343 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1345 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1348 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1350 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1353 static inline void btrfs_item_key(struct extent_buffer *eb,
1354 struct btrfs_disk_key *disk_key, int nr)
1356 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1357 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1360 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1361 struct btrfs_disk_key *disk_key, int nr)
1363 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1364 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1367 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1370 * struct btrfs_root_ref
1372 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1373 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1374 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1376 /* struct btrfs_dir_item */
1377 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1378 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1379 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1380 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1382 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1383 struct btrfs_dir_item *item,
1384 struct btrfs_disk_key *key)
1386 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1389 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1390 struct btrfs_dir_item *item,
1391 struct btrfs_disk_key *key)
1393 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1396 /* struct btrfs_disk_key */
1397 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1399 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1400 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1402 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1403 struct btrfs_disk_key *disk)
1405 cpu->offset = le64_to_cpu(disk->offset);
1406 cpu->type = disk->type;
1407 cpu->objectid = le64_to_cpu(disk->objectid);
1410 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1411 struct btrfs_key *cpu)
1413 disk->offset = cpu_to_le64(cpu->offset);
1414 disk->type = cpu->type;
1415 disk->objectid = cpu_to_le64(cpu->objectid);
1418 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1419 struct btrfs_key *key, int nr)
1421 struct btrfs_disk_key disk_key;
1422 btrfs_node_key(eb, &disk_key, nr);
1423 btrfs_disk_key_to_cpu(key, &disk_key);
1426 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1427 struct btrfs_key *key, int nr)
1429 struct btrfs_disk_key disk_key;
1430 btrfs_item_key(eb, &disk_key, nr);
1431 btrfs_disk_key_to_cpu(key, &disk_key);
1434 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1435 struct btrfs_dir_item *item,
1436 struct btrfs_key *key)
1438 struct btrfs_disk_key disk_key;
1439 btrfs_dir_item_key(eb, item, &disk_key);
1440 btrfs_disk_key_to_cpu(key, &disk_key);
1444 static inline u8 btrfs_key_type(struct btrfs_key *key)
1449 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1454 /* struct btrfs_header */
1455 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1456 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1458 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1459 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1460 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1461 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1463 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1465 return (btrfs_header_flags(eb) & flag) == flag;
1468 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1470 u64 flags = btrfs_header_flags(eb);
1471 btrfs_set_header_flags(eb, flags | flag);
1472 return (flags & flag) == flag;
1475 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1477 u64 flags = btrfs_header_flags(eb);
1478 btrfs_set_header_flags(eb, flags & ~flag);
1479 return (flags & flag) == flag;
1482 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1484 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1488 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1490 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1494 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1496 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1500 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1502 unsigned long ptr = offsetof(struct btrfs_header, csum);
1506 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1511 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1516 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1521 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1523 return btrfs_header_level(eb) == 0;
1526 /* struct btrfs_root_item */
1527 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1529 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1530 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1531 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1533 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1535 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1536 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1537 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1538 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1539 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1540 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1541 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1542 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1545 /* struct btrfs_super_block */
1547 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1548 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1549 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1551 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1552 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1553 struct btrfs_super_block, sys_chunk_array_size, 32);
1554 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1555 struct btrfs_super_block, chunk_root_generation, 64);
1556 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1558 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1560 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1561 chunk_root_level, 8);
1562 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1564 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1565 log_root_transid, 64);
1566 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1568 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1570 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1572 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1574 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1576 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1578 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1580 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1581 root_dir_objectid, 64);
1582 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1584 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1586 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1588 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1589 incompat_flags, 64);
1590 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1593 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1595 int t = btrfs_super_csum_type(s);
1596 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1597 return btrfs_csum_sizes[t];
1600 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1602 return offsetof(struct btrfs_leaf, items);
1605 /* struct btrfs_file_extent_item */
1606 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1608 static inline unsigned long
1609 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
1611 unsigned long offset = (unsigned long)e;
1612 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1616 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1618 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1621 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1623 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1625 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1626 disk_num_bytes, 64);
1627 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1629 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1631 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1633 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1635 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1637 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1638 other_encoding, 16);
1640 /* this returns the number of file bytes represented by the inline item.
1641 * If an item is compressed, this is the uncompressed size
1643 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1644 struct btrfs_file_extent_item *e)
1646 return btrfs_file_extent_ram_bytes(eb, e);
1650 * this returns the number of bytes used by the item on disk, minus the
1651 * size of any extent headers. If a file is compressed on disk, this is
1652 * the compressed size
1654 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1655 struct btrfs_item *e)
1657 unsigned long offset;
1658 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1659 return btrfs_item_size(eb, e) - offset;
1662 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1664 return sb->s_fs_info;
1667 static inline int btrfs_set_root_name(struct btrfs_root *root,
1668 const char *name, int len)
1670 /* if we already have a name just free it */
1673 root->name = kmalloc(len+1, GFP_KERNEL);
1677 memcpy(root->name, name, len);
1678 root->name[len] = '\0';
1683 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
1686 return root->leafsize;
1687 return root->nodesize;
1690 /* helper function to cast into the data area of the leaf. */
1691 #define btrfs_item_ptr(leaf, slot, type) \
1692 ((type *)(btrfs_leaf_data(leaf) + \
1693 btrfs_item_offset_nr(leaf, slot)))
1695 #define btrfs_item_ptr_offset(leaf, slot) \
1696 ((unsigned long)(btrfs_leaf_data(leaf) + \
1697 btrfs_item_offset_nr(leaf, slot)))
1699 static inline struct dentry *fdentry(struct file *file)
1701 return file->f_path.dentry;
1705 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
1706 struct btrfs_root *root, unsigned long count);
1707 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1708 int btrfs_update_pinned_extents(struct btrfs_root *root,
1709 u64 bytenr, u64 num, int pin);
1710 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1711 struct btrfs_root *root, struct extent_buffer *leaf);
1712 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1713 struct btrfs_root *root, u64 objectid, u64 bytenr);
1714 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1715 struct btrfs_block_group_cache *btrfs_lookup_block_group(
1716 struct btrfs_fs_info *info,
1718 u64 btrfs_find_block_group(struct btrfs_root *root,
1719 u64 search_start, u64 search_hint, int owner);
1720 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1721 struct btrfs_root *root,
1722 u32 blocksize, u64 parent,
1728 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1729 struct btrfs_root *root,
1730 u64 bytenr, u32 blocksize,
1732 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1733 struct btrfs_root *root,
1734 u64 num_bytes, u64 parent, u64 min_bytes,
1735 u64 root_objectid, u64 ref_generation,
1736 u64 owner, u64 empty_size, u64 hint_byte,
1737 u64 search_end, struct btrfs_key *ins, u64 data);
1738 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1739 struct btrfs_root *root, u64 parent,
1740 u64 root_objectid, u64 ref_generation,
1741 u64 owner, struct btrfs_key *ins);
1742 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1743 struct btrfs_root *root, u64 parent,
1744 u64 root_objectid, u64 ref_generation,
1745 u64 owner, struct btrfs_key *ins);
1746 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1747 struct btrfs_root *root,
1748 u64 num_bytes, u64 min_alloc_size,
1749 u64 empty_size, u64 hint_byte,
1750 u64 search_end, struct btrfs_key *ins,
1752 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1753 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1755 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1756 struct extent_buffer *buf, u32 nr_extents);
1757 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1758 struct btrfs_root *root, struct extent_buffer *orig_buf,
1759 struct extent_buffer *buf, int start_slot, int nr);
1760 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1761 struct btrfs_root *root,
1762 u64 bytenr, u64 num_bytes, u64 parent,
1763 u64 root_objectid, u64 ref_generation,
1764 u64 owner_objectid, int pin);
1765 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1766 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1767 struct btrfs_root *root,
1768 struct extent_io_tree *unpin);
1769 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1770 struct btrfs_root *root,
1771 u64 bytenr, u64 num_bytes, u64 parent,
1772 u64 root_objectid, u64 ref_generation,
1773 u64 owner_objectid);
1774 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1775 struct btrfs_root *root, u64 bytenr, u64 num_bytes,
1776 u64 orig_parent, u64 parent,
1777 u64 root_objectid, u64 ref_generation,
1778 u64 owner_objectid);
1779 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1780 struct btrfs_root *root);
1781 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
1782 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1783 int btrfs_read_block_groups(struct btrfs_root *root);
1784 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1785 struct btrfs_root *root, u64 bytes_used,
1786 u64 type, u64 chunk_objectid, u64 chunk_offset,
1788 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1789 struct btrfs_root *root, u64 group_start);
1790 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1791 int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
1792 struct btrfs_root *root);
1793 int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1794 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1795 struct btrfs_root *root,
1796 struct extent_buffer *buf, u64 orig_start);
1797 int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1798 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1799 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
1800 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
1801 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
1802 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
1804 int btrfs_check_metadata_free_space(struct btrfs_root *root);
1805 int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
1807 void btrfs_free_reserved_data_space(struct btrfs_root *root,
1808 struct inode *inode, u64 bytes);
1809 void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode,
1811 void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode,
1814 int btrfs_previous_item(struct btrfs_root *root,
1815 struct btrfs_path *path, u64 min_objectid,
1817 int btrfs_merge_path(struct btrfs_trans_handle *trans,
1818 struct btrfs_root *root,
1819 struct btrfs_key *node_keys,
1820 u64 *nodes, int lowest_level);
1821 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1822 struct btrfs_root *root, struct btrfs_path *path,
1823 struct btrfs_key *new_key);
1824 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1825 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1826 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1827 struct btrfs_key *key, int lowest_level,
1828 int cache_only, u64 min_trans);
1829 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1830 struct btrfs_key *max_key,
1831 struct btrfs_path *path, int cache_only,
1833 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1834 struct btrfs_root *root, struct extent_buffer *buf,
1835 struct extent_buffer *parent, int parent_slot,
1836 struct extent_buffer **cow_ret);
1837 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1838 struct btrfs_root *root,
1839 struct extent_buffer *buf,
1840 struct extent_buffer **cow_ret, u64 new_root_objectid);
1841 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1842 *root, struct btrfs_path *path, u32 data_size);
1843 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1844 struct btrfs_root *root,
1845 struct btrfs_path *path,
1846 u32 new_size, int from_end);
1847 int btrfs_split_item(struct btrfs_trans_handle *trans,
1848 struct btrfs_root *root,
1849 struct btrfs_path *path,
1850 struct btrfs_key *new_key,
1851 unsigned long split_offset);
1852 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1853 *root, struct btrfs_key *key, struct btrfs_path *p, int
1855 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1856 struct btrfs_root *root, struct extent_buffer *parent,
1857 int start_slot, int cache_only, u64 *last_ret,
1858 struct btrfs_key *progress);
1859 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1860 struct btrfs_path *btrfs_alloc_path(void);
1861 void btrfs_free_path(struct btrfs_path *p);
1862 void btrfs_set_path_blocking(struct btrfs_path *p);
1863 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
1865 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1866 struct btrfs_path *path, int slot, int nr);
1867 int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1868 struct btrfs_root *root,
1869 struct btrfs_path *path, u64 bytenr);
1870 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1871 struct btrfs_root *root,
1872 struct btrfs_path *path)
1874 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1877 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1878 *root, struct btrfs_key *key, void *data, u32 data_size);
1879 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
1880 struct btrfs_root *root,
1881 struct btrfs_path *path,
1882 struct btrfs_key *cpu_key, u32 *data_size,
1884 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1885 struct btrfs_root *root,
1886 struct btrfs_path *path,
1887 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1889 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1890 struct btrfs_root *root,
1891 struct btrfs_path *path,
1892 struct btrfs_key *key,
1895 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1898 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1899 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1900 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1901 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1903 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
1904 struct btrfs_root *root,
1905 struct extent_buffer *node,
1906 struct extent_buffer *parent);
1908 int btrfs_find_root_ref(struct btrfs_root *tree_root,
1909 struct btrfs_path *path,
1910 u64 root_id, u64 ref_id);
1911 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1912 struct btrfs_root *tree_root,
1913 u64 root_id, u8 type, u64 ref_id,
1914 u64 dirid, u64 sequence,
1915 const char *name, int name_len);
1916 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1917 struct btrfs_key *key);
1918 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1919 *root, struct btrfs_key *key, struct btrfs_root_item
1921 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1922 *root, struct btrfs_key *key, struct btrfs_root_item
1924 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1925 btrfs_root_item *item, struct btrfs_key *key);
1926 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1927 u64 *found_objectid);
1928 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1929 struct btrfs_root *latest_root);
1931 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
1932 struct btrfs_root *root, const char *name,
1933 int name_len, u64 dir,
1934 struct btrfs_key *location, u8 type, u64 index);
1935 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1936 struct btrfs_root *root,
1937 struct btrfs_path *path, u64 dir,
1938 const char *name, int name_len,
1940 struct btrfs_dir_item *
1941 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1942 struct btrfs_root *root,
1943 struct btrfs_path *path, u64 dir,
1944 u64 objectid, const char *name, int name_len,
1946 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1947 struct btrfs_path *path,
1948 const char *name, int name_len);
1949 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1950 struct btrfs_root *root,
1951 struct btrfs_path *path,
1952 struct btrfs_dir_item *di);
1953 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1954 struct btrfs_root *root, const char *name,
1955 u16 name_len, const void *data, u16 data_len,
1957 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1958 struct btrfs_root *root,
1959 struct btrfs_path *path, u64 dir,
1960 const char *name, u16 name_len,
1964 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1965 struct btrfs_root *root, u64 offset);
1966 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1967 struct btrfs_root *root, u64 offset);
1970 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1971 struct btrfs_root *fs_root,
1972 u64 dirid, u64 *objectid);
1973 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1976 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1977 struct btrfs_root *root,
1978 const char *name, int name_len,
1979 u64 inode_objectid, u64 ref_objectid, u64 index);
1980 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1981 struct btrfs_root *root,
1982 const char *name, int name_len,
1983 u64 inode_objectid, u64 ref_objectid, u64 *index);
1984 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1985 struct btrfs_root *root,
1986 struct btrfs_path *path, u64 objectid);
1987 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1988 *root, struct btrfs_path *path,
1989 struct btrfs_key *location, int mod);
1992 int btrfs_del_csums(struct btrfs_trans_handle *trans,
1993 struct btrfs_root *root, u64 bytenr, u64 len);
1994 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1995 struct bio *bio, u32 *dst);
1996 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1997 struct btrfs_root *root,
1998 u64 objectid, u64 pos,
1999 u64 disk_offset, u64 disk_num_bytes,
2000 u64 num_bytes, u64 offset, u64 ram_bytes,
2001 u8 compression, u8 encryption, u16 other_encoding);
2002 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2003 struct btrfs_root *root,
2004 struct btrfs_path *path, u64 objectid,
2005 u64 bytenr, int mod);
2006 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2007 struct btrfs_root *root,
2008 struct btrfs_ordered_sum *sums);
2009 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2010 struct bio *bio, u64 file_start, int contig);
2011 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2012 u64 start, unsigned long len);
2013 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2014 struct btrfs_root *root,
2015 struct btrfs_path *path,
2016 u64 bytenr, int cow);
2017 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2018 struct btrfs_root *root, struct btrfs_path *path,
2020 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2021 u64 end, struct list_head *list);
2024 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2025 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2026 #define ClearPageChecked ClearPageFsMisc
2027 #define SetPageChecked SetPageFsMisc
2028 #define PageChecked PageFsMisc
2031 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2032 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2033 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2034 struct btrfs_root *root,
2035 struct inode *dir, struct inode *inode,
2036 const char *name, int name_len);
2037 int btrfs_add_link(struct btrfs_trans_handle *trans,
2038 struct inode *parent_inode, struct inode *inode,
2039 const char *name, int name_len, int add_backref, u64 index);
2040 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2041 struct btrfs_root *root,
2042 struct inode *inode, u64 new_size,
2045 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
2046 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
2047 int btrfs_writepages(struct address_space *mapping,
2048 struct writeback_control *wbc);
2049 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2050 struct btrfs_root *new_root, struct dentry *dentry,
2051 u64 new_dirid, u64 alloc_hint);
2052 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2053 size_t size, struct bio *bio, unsigned long bio_flags);
2055 unsigned long btrfs_force_ra(struct address_space *mapping,
2056 struct file_ra_state *ra, struct file *file,
2057 pgoff_t offset, pgoff_t last_index);
2058 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
2059 int btrfs_readpage(struct file *file, struct page *page);
2060 void btrfs_delete_inode(struct inode *inode);
2061 void btrfs_put_inode(struct inode *inode);
2062 void btrfs_read_locked_inode(struct inode *inode);
2063 int btrfs_write_inode(struct inode *inode, int wait);
2064 void btrfs_dirty_inode(struct inode *inode);
2065 struct inode *btrfs_alloc_inode(struct super_block *sb);
2066 void btrfs_destroy_inode(struct inode *inode);
2067 int btrfs_init_cachep(void);
2068 void btrfs_destroy_cachep(void);
2069 long btrfs_ioctl_trans_end(struct file *file);
2070 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
2071 struct btrfs_root *root, int wait);
2072 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
2073 struct btrfs_root *root);
2074 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2075 struct btrfs_root *root, int *is_new);
2076 int btrfs_commit_write(struct file *file, struct page *page,
2077 unsigned from, unsigned to);
2078 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2079 size_t page_offset, u64 start, u64 end,
2081 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2082 struct btrfs_root *root,
2083 struct inode *inode);
2084 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2085 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2086 void btrfs_orphan_cleanup(struct btrfs_root *root);
2087 int btrfs_cont_expand(struct inode *inode, loff_t size);
2090 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2093 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
2094 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2096 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2097 extern struct file_operations btrfs_file_operations;
2098 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2099 struct btrfs_root *root, struct inode *inode,
2100 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
2101 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2102 struct btrfs_root *root,
2103 struct inode *inode, u64 start, u64 end);
2104 int btrfs_release_file(struct inode *inode, struct file *file);
2107 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2108 struct btrfs_root *root, int cache_only);
2111 int btrfs_init_sysfs(void);
2112 void btrfs_exit_sysfs(void);
2113 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2114 int btrfs_sysfs_add_root(struct btrfs_root *root);
2115 void btrfs_sysfs_del_root(struct btrfs_root *root);
2116 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2119 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2122 u64 btrfs_parse_size(char *str);
2123 int btrfs_parse_options(struct btrfs_root *root, char *options);
2124 int btrfs_sync_fs(struct super_block *sb, int wait);
2127 int btrfs_check_acl(struct inode *inode, int mask);
2128 int btrfs_init_acl(struct inode *inode, struct inode *dir);
2129 int btrfs_acl_chmod(struct inode *inode);
2131 /* free-space-cache.c */
2132 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
2133 u64 bytenr, u64 size);
2134 int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group,
2135 u64 offset, u64 bytes);
2136 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
2137 u64 bytenr, u64 size);
2138 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group,
2139 u64 offset, u64 bytes);
2140 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2142 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
2143 *block_group, u64 offset,
2145 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
2147 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);