2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
22 #include <linux/version.h>
24 #include <linux/highmem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <asm/kmap_types.h>
30 #include "extent_io.h"
31 #include "extent_map.h"
32 #include "async-thread.h"
34 struct btrfs_trans_handle;
35 struct btrfs_transaction;
36 extern struct kmem_cache *btrfs_trans_handle_cachep;
37 extern struct kmem_cache *btrfs_transaction_cachep;
38 extern struct kmem_cache *btrfs_bit_radix_cachep;
39 extern struct kmem_cache *btrfs_path_cachep;
40 struct btrfs_ordered_sum;
42 #define BTRFS_MAGIC "_BHRfS_M"
44 #define BTRFS_ACL_NOT_CACHED ((void *)-1)
46 #define BTRFS_MAX_LEVEL 8
48 /* holds pointers to all of the tree roots */
49 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
51 /* stores information about which extents are in use, and reference counts */
52 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
55 * chunk tree stores translations from logical -> physical block numbering
56 * the super block points to the chunk tree
58 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
61 * stores information about which areas of a given device are in use.
62 * one per device. The tree of tree roots points to the device tree
64 #define BTRFS_DEV_TREE_OBJECTID 4ULL
66 /* one per subvolume, storing files and directories */
67 #define BTRFS_FS_TREE_OBJECTID 5ULL
69 /* directory objectid inside the root tree */
70 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
72 /* holds checksums of all the data extents */
73 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
75 /* orhpan objectid for tracking unlinked/truncated files */
76 #define BTRFS_ORPHAN_OBJECTID -5ULL
78 /* does write ahead logging to speed up fsyncs */
79 #define BTRFS_TREE_LOG_OBJECTID -6ULL
80 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
82 /* for space balancing */
83 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
84 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
87 * extent checksums all have this objectid
88 * this allows them to share the logging tree
91 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
93 /* dummy objectid represents multiple objectids */
94 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
97 * All files have objectids in this range.
99 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
100 #define BTRFS_LAST_FREE_OBJECTID -256ULL
101 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
105 * the device items go into the chunk tree. The key is in the form
106 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
108 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
111 * we can actually store much bigger names, but lets not confuse the rest
114 #define BTRFS_NAME_LEN 255
116 /* 32 bytes in various csum fields */
117 #define BTRFS_CSUM_SIZE 32
120 #define BTRFS_CSUM_TYPE_CRC32 0
122 static int btrfs_csum_sizes[] = { 4, 0 };
124 /* four bytes for CRC32 */
125 #define BTRFS_EMPTY_DIR_SIZE 0
127 #define BTRFS_FT_UNKNOWN 0
128 #define BTRFS_FT_REG_FILE 1
129 #define BTRFS_FT_DIR 2
130 #define BTRFS_FT_CHRDEV 3
131 #define BTRFS_FT_BLKDEV 4
132 #define BTRFS_FT_FIFO 5
133 #define BTRFS_FT_SOCK 6
134 #define BTRFS_FT_SYMLINK 7
135 #define BTRFS_FT_XATTR 8
136 #define BTRFS_FT_MAX 9
139 * the key defines the order in the tree, and so it also defines (optimal)
140 * block layout. objectid corresonds to the inode number. The flags
141 * tells us things about the object, and is a kind of stream selector.
142 * so for a given inode, keys with flags of 1 might refer to the inode
143 * data, flags of 2 may point to file data in the btree and flags == 3
144 * may point to extents.
146 * offset is the starting byte offset for this key in the stream.
148 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
149 * in cpu native order. Otherwise they are identical and their sizes
150 * should be the same (ie both packed)
152 struct btrfs_disk_key {
156 } __attribute__ ((__packed__));
162 } __attribute__ ((__packed__));
164 struct btrfs_mapping_tree {
165 struct extent_map_tree map_tree;
168 #define BTRFS_UUID_SIZE 16
169 struct btrfs_dev_item {
170 /* the internal btrfs device id */
173 /* size of the device */
179 /* optimal io alignment for this device */
182 /* optimal io width for this device */
185 /* minimal io size for this device */
188 /* type and info about this device */
191 /* expected generation for this device */
195 * starting byte of this partition on the device,
196 * to allowr for stripe alignment in the future
200 /* grouping information for allocation decisions */
203 /* seek speed 0-100 where 100 is fastest */
206 /* bandwidth 0-100 where 100 is fastest */
209 /* btrfs generated uuid for this device */
210 u8 uuid[BTRFS_UUID_SIZE];
212 /* uuid of FS who owns this device */
213 u8 fsid[BTRFS_UUID_SIZE];
214 } __attribute__ ((__packed__));
216 struct btrfs_stripe {
219 u8 dev_uuid[BTRFS_UUID_SIZE];
220 } __attribute__ ((__packed__));
223 /* size of this chunk in bytes */
226 /* objectid of the root referencing this chunk */
232 /* optimal io alignment for this chunk */
235 /* optimal io width for this chunk */
238 /* minimal io size for this chunk */
241 /* 2^16 stripes is quite a lot, a second limit is the size of a single
246 /* sub stripes only matter for raid10 */
248 struct btrfs_stripe stripe;
249 /* additional stripes go here */
250 } __attribute__ ((__packed__));
252 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
254 BUG_ON(num_stripes == 0);
255 return sizeof(struct btrfs_chunk) +
256 sizeof(struct btrfs_stripe) * (num_stripes - 1);
259 #define BTRFS_FSID_SIZE 16
260 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
263 * every tree block (leaf or node) starts with this header.
265 struct btrfs_header {
266 /* these first four must match the super block */
267 u8 csum[BTRFS_CSUM_SIZE];
268 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
269 __le64 bytenr; /* which block this node is supposed to live in */
272 /* allowed to be different from the super from here on down */
273 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
278 } __attribute__ ((__packed__));
280 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
281 sizeof(struct btrfs_header)) / \
282 sizeof(struct btrfs_key_ptr))
283 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
284 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
285 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
286 sizeof(struct btrfs_item) - \
287 sizeof(struct btrfs_file_extent_item))
289 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
292 * this is a very generous portion of the super block, giving us
293 * room to translate 14 chunks with 3 stripes each.
295 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
296 #define BTRFS_LABEL_SIZE 256
299 * the super block basically lists the main trees of the FS
300 * it currently lacks any block count etc etc
302 struct btrfs_super_block {
303 u8 csum[BTRFS_CSUM_SIZE];
304 /* the first 4 fields must match struct btrfs_header */
305 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
306 __le64 bytenr; /* this block number */
309 /* allowed to be different from the btrfs_header from here own down */
316 /* this will help find the new super based on the log root */
317 __le64 log_root_transid;
320 __le64 root_dir_objectid;
326 __le32 sys_chunk_array_size;
327 __le64 chunk_root_generation;
329 __le64 compat_ro_flags;
330 __le64 incompat_flags;
335 struct btrfs_dev_item dev_item;
337 char label[BTRFS_LABEL_SIZE];
339 /* future expansion */
341 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
342 } __attribute__ ((__packed__));
345 * Compat flags that we support. If any incompat flags are set other than the
346 * ones specified below then we will fail to mount
348 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
349 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
350 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
353 * A leaf is full of items. offset and size tell us where to find
354 * the item in the leaf (relative to the start of the data area)
357 struct btrfs_disk_key key;
360 } __attribute__ ((__packed__));
363 * leaves have an item area and a data area:
364 * [item0, item1....itemN] [free space] [dataN...data1, data0]
366 * The data is separate from the items to get the keys closer together
370 struct btrfs_header header;
371 struct btrfs_item items[];
372 } __attribute__ ((__packed__));
375 * all non-leaf blocks are nodes, they hold only keys and pointers to
378 struct btrfs_key_ptr {
379 struct btrfs_disk_key key;
382 } __attribute__ ((__packed__));
385 struct btrfs_header header;
386 struct btrfs_key_ptr ptrs[];
387 } __attribute__ ((__packed__));
390 * btrfs_paths remember the path taken from the root down to the leaf.
391 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
392 * to any other levels that are present.
394 * The slots array records the index of the item or block pointer
395 * used while walking the tree.
398 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
399 int slots[BTRFS_MAX_LEVEL];
400 /* if there is real range locking, this locks field will change */
401 int locks[BTRFS_MAX_LEVEL];
403 /* keep some upper locks as we walk down */
407 * set by btrfs_split_item, tells search_slot to keep all locks
408 * and to force calls to keep space in the nodes
410 unsigned int search_for_split:1;
411 unsigned int keep_locks:1;
412 unsigned int skip_locking:1;
413 unsigned int leave_spinning:1;
417 * items in the extent btree are used to record the objectid of the
418 * owner of the block and the number of references
420 struct btrfs_extent_item {
422 } __attribute__ ((__packed__));
424 struct btrfs_extent_ref {
429 } __attribute__ ((__packed__));
431 /* dev extents record free space on individual devices. The owner
432 * field points back to the chunk allocation mapping tree that allocated
433 * the extent. The chunk tree uuid field is a way to double check the owner
435 struct btrfs_dev_extent {
437 __le64 chunk_objectid;
440 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
441 } __attribute__ ((__packed__));
443 struct btrfs_inode_ref {
447 } __attribute__ ((__packed__));
449 struct btrfs_timespec {
452 } __attribute__ ((__packed__));
454 enum btrfs_compression_type {
455 BTRFS_COMPRESS_NONE = 0,
456 BTRFS_COMPRESS_ZLIB = 1,
457 BTRFS_COMPRESS_LAST = 2,
460 struct btrfs_inode_item {
461 /* nfs style generation number */
463 /* transid that last touched this inode */
475 /* modification sequence number for NFS */
479 * a little future expansion, for more than this we can
480 * just grow the inode item and version it
483 struct btrfs_timespec atime;
484 struct btrfs_timespec ctime;
485 struct btrfs_timespec mtime;
486 struct btrfs_timespec otime;
487 } __attribute__ ((__packed__));
489 struct btrfs_dir_log_item {
491 } __attribute__ ((__packed__));
493 struct btrfs_dir_item {
494 struct btrfs_disk_key location;
499 } __attribute__ ((__packed__));
501 struct btrfs_root_item {
502 struct btrfs_inode_item inode;
508 __le64 last_snapshot;
511 struct btrfs_disk_key drop_progress;
514 } __attribute__ ((__packed__));
517 * this is used for both forward and backward root refs
519 struct btrfs_root_ref {
523 } __attribute__ ((__packed__));
525 #define BTRFS_FILE_EXTENT_INLINE 0
526 #define BTRFS_FILE_EXTENT_REG 1
527 #define BTRFS_FILE_EXTENT_PREALLOC 2
529 struct btrfs_file_extent_item {
531 * transaction id that created this extent
535 * max number of bytes to hold this extent in ram
536 * when we split a compressed extent we can't know how big
537 * each of the resulting pieces will be. So, this is
538 * an upper limit on the size of the extent in ram instead of
544 * 32 bits for the various ways we might encode the data,
545 * including compression and encryption. If any of these
546 * are set to something a given disk format doesn't understand
547 * it is treated like an incompat flag for reading and writing,
552 __le16 other_encoding; /* spare for later use */
554 /* are we inline data or a real extent? */
558 * disk space consumed by the extent, checksum blocks are included
562 __le64 disk_num_bytes;
564 * the logical offset in file blocks (no csums)
565 * this extent record is for. This allows a file extent to point
566 * into the middle of an existing extent on disk, sharing it
567 * between two snapshots (useful if some bytes in the middle of the
568 * extent have changed
572 * the logical number of file blocks (no csums included). This
573 * always reflects the size uncompressed and without encoding.
577 } __attribute__ ((__packed__));
579 struct btrfs_csum_item {
581 } __attribute__ ((__packed__));
583 /* different types of block groups (and chunks) */
584 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
585 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
586 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
587 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
588 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
589 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
590 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
592 struct btrfs_block_group_item {
594 __le64 chunk_objectid;
596 } __attribute__ ((__packed__));
598 struct btrfs_space_info {
601 u64 total_bytes; /* total bytes in the space */
602 u64 bytes_used; /* total bytes used on disk */
603 u64 bytes_pinned; /* total bytes pinned, will be freed when the
604 transaction finishes */
605 u64 bytes_reserved; /* total bytes the allocator has reserved for
606 current allocations */
607 u64 bytes_readonly; /* total bytes that are read only */
609 /* delalloc accounting */
610 u64 bytes_delalloc; /* number of bytes reserved for allocation,
611 this space is not necessarily reserved yet
613 u64 bytes_may_use; /* number of bytes that may be used for
616 int full; /* indicates that we cannot allocate any more
617 chunks for this space */
618 int force_alloc; /* set if we need to force a chunk alloc for
621 struct list_head list;
623 /* for block groups in our same type */
624 struct list_head block_groups;
626 struct rw_semaphore groups_sem;
629 struct btrfs_free_space {
630 struct rb_node bytes_index;
631 struct rb_node offset_index;
636 struct btrfs_block_group_cache {
637 struct btrfs_key key;
638 struct btrfs_block_group_item item;
640 struct mutex alloc_mutex;
641 struct mutex cache_mutex;
649 struct btrfs_space_info *space_info;
651 /* free space cache stuff */
652 struct rb_root free_space_bytes;
653 struct rb_root free_space_offset;
655 /* block group cache stuff */
656 struct rb_node cache_node;
658 /* for block groups in the same raid type */
659 struct list_head list;
665 struct btrfs_leaf_ref_tree {
667 struct list_head list;
672 struct btrfs_fs_devices;
673 struct btrfs_fs_info {
674 u8 fsid[BTRFS_FSID_SIZE];
675 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
676 struct btrfs_root *extent_root;
677 struct btrfs_root *tree_root;
678 struct btrfs_root *chunk_root;
679 struct btrfs_root *dev_root;
680 struct btrfs_root *fs_root;
681 struct btrfs_root *csum_root;
683 /* the log root tree is a directory of all the other log roots */
684 struct btrfs_root *log_root_tree;
685 struct radix_tree_root fs_roots_radix;
687 /* block group cache stuff */
688 spinlock_t block_group_cache_lock;
689 struct rb_root block_group_cache_tree;
691 struct extent_io_tree pinned_extents;
693 /* logical->physical extent mapping */
694 struct btrfs_mapping_tree mapping_tree;
697 u64 last_trans_committed;
698 u64 last_trans_new_blockgroup;
699 u64 open_ioctl_trans;
700 unsigned long mount_opt;
704 struct btrfs_transaction *running_transaction;
705 wait_queue_head_t transaction_throttle;
706 wait_queue_head_t transaction_wait;
707 wait_queue_head_t async_submit_wait;
709 struct btrfs_super_block super_copy;
710 struct btrfs_super_block super_for_commit;
711 struct block_device *__bdev;
712 struct super_block *sb;
713 struct inode *btree_inode;
714 struct backing_dev_info bdi;
715 struct mutex trans_mutex;
716 struct mutex tree_log_mutex;
717 struct mutex transaction_kthread_mutex;
718 struct mutex cleaner_mutex;
719 struct mutex pinned_mutex;
720 struct mutex chunk_mutex;
721 struct mutex drop_mutex;
722 struct mutex volume_mutex;
723 struct mutex tree_reloc_mutex;
725 struct list_head trans_list;
726 struct list_head hashers;
727 struct list_head dead_roots;
729 atomic_t nr_async_submits;
730 atomic_t async_submit_draining;
731 atomic_t nr_async_bios;
732 atomic_t async_delalloc_pages;
735 * this is used by the balancing code to wait for all the pending
738 spinlock_t ordered_extent_lock;
739 struct list_head ordered_extents;
740 struct list_head delalloc_inodes;
743 * there is a pool of worker threads for checksumming during writes
744 * and a pool for checksumming after reads. This is because readers
745 * can run with FS locks held, and the writers may be waiting for
746 * those locks. We don't want ordering in the pending list to cause
747 * deadlocks, and so the two are serviced separately.
749 * A third pool does submit_bio to avoid deadlocking with the other
752 struct btrfs_workers workers;
753 struct btrfs_workers delalloc_workers;
754 struct btrfs_workers endio_workers;
755 struct btrfs_workers endio_meta_workers;
756 struct btrfs_workers endio_meta_write_workers;
757 struct btrfs_workers endio_write_workers;
758 struct btrfs_workers submit_workers;
760 * fixup workers take dirty pages that didn't properly go through
761 * the cow mechanism and make them safe to write. It happens
762 * for the sys_munmap function call path
764 struct btrfs_workers fixup_workers;
765 struct task_struct *transaction_kthread;
766 struct task_struct *cleaner_kthread;
767 int thread_pool_size;
769 /* tree relocation relocated fields */
770 struct list_head dead_reloc_roots;
771 struct btrfs_leaf_ref_tree reloc_ref_tree;
772 struct btrfs_leaf_ref_tree shared_ref_tree;
774 struct kobject super_kobj;
775 struct completion kobj_unregister;
778 int log_root_recovering;
780 atomic_t throttle_gen;
784 /* protected by the delalloc lock, used to keep from writing
785 * metadata until there is a nice batch
787 u64 dirty_metadata_bytes;
788 struct list_head dirty_cowonly_roots;
790 struct btrfs_fs_devices *fs_devices;
793 * the space_info list is almost entirely read only. It only changes
794 * when we add a new raid type to the FS, and that happens
795 * very rarely. RCU is used to protect it.
797 struct list_head space_info;
799 spinlock_t delalloc_lock;
800 spinlock_t new_trans_lock;
805 spinlock_t ref_cache_lock;
806 u64 total_ref_cache_size;
808 u64 avail_data_alloc_bits;
809 u64 avail_metadata_alloc_bits;
810 u64 avail_system_alloc_bits;
811 u64 data_alloc_profile;
812 u64 metadata_alloc_profile;
813 u64 system_alloc_profile;
819 * in ram representation of the tree. extent_root is used for all allocations
820 * and for the extent tree extent_root root.
822 struct btrfs_dirty_root;
824 struct extent_buffer *node;
826 /* the node lock is held while changing the node pointer */
827 spinlock_t node_lock;
829 struct extent_buffer *commit_root;
830 struct btrfs_leaf_ref_tree *ref_tree;
831 struct btrfs_leaf_ref_tree ref_tree_struct;
832 struct btrfs_dirty_root *dirty_root;
833 struct btrfs_root *log_root;
834 struct btrfs_root *reloc_root;
836 struct btrfs_root_item root_item;
837 struct btrfs_key root_key;
838 struct btrfs_fs_info *fs_info;
839 struct extent_io_tree dirty_log_pages;
841 struct kobject root_kobj;
842 struct completion kobj_unregister;
843 struct mutex objectid_mutex;
845 struct mutex log_mutex;
846 wait_queue_head_t log_writer_wait;
847 wait_queue_head_t log_commit_wait[2];
848 atomic_t log_writers;
849 atomic_t log_commit[2];
850 unsigned long log_transid;
851 unsigned long log_batch;
856 /* data allocations are done in sectorsize units */
859 /* node allocations are done in nodesize units */
862 /* leaf allocations are done in leafsize units */
869 u64 last_inode_alloc;
872 u64 defrag_trans_start;
873 struct btrfs_key defrag_progress;
874 struct btrfs_key defrag_max;
880 /* the dirty list is only used by non-reference counted roots */
881 struct list_head dirty_list;
883 spinlock_t list_lock;
884 struct list_head dead_list;
885 struct list_head orphan_list;
888 * right now this just gets used so that a root has its own devid
889 * for stat. It may be used for more later
891 struct super_block anon_super;
896 * inode items have the data typically returned from stat and store other
897 * info about object characteristics. There is one for every file and dir in
900 #define BTRFS_INODE_ITEM_KEY 1
901 #define BTRFS_INODE_REF_KEY 12
902 #define BTRFS_XATTR_ITEM_KEY 24
903 #define BTRFS_ORPHAN_ITEM_KEY 48
904 /* reserve 2-15 close to the inode for later flexibility */
907 * dir items are the name -> inode pointers in a directory. There is one
908 * for every name in a directory.
910 #define BTRFS_DIR_LOG_ITEM_KEY 60
911 #define BTRFS_DIR_LOG_INDEX_KEY 72
912 #define BTRFS_DIR_ITEM_KEY 84
913 #define BTRFS_DIR_INDEX_KEY 96
915 * extent data is for file data
917 #define BTRFS_EXTENT_DATA_KEY 108
920 * extent csums are stored in a separate tree and hold csums for
921 * an entire extent on disk.
923 #define BTRFS_EXTENT_CSUM_KEY 128
926 * root items point to tree roots. There are typically in the root
927 * tree used by the super block to find all the other trees
929 #define BTRFS_ROOT_ITEM_KEY 132
932 * root backrefs tie subvols and snapshots to the directory entries that
935 #define BTRFS_ROOT_BACKREF_KEY 144
938 * root refs make a fast index for listing all of the snapshots and
939 * subvolumes referenced by a given root. They point directly to the
940 * directory item in the root that references the subvol
942 #define BTRFS_ROOT_REF_KEY 156
945 * extent items are in the extent map tree. These record which blocks
946 * are used, and how many references there are to each block
948 #define BTRFS_EXTENT_ITEM_KEY 168
949 #define BTRFS_EXTENT_REF_KEY 180
952 * block groups give us hints into the extent allocation trees. Which
953 * blocks are free etc etc
955 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
957 #define BTRFS_DEV_EXTENT_KEY 204
958 #define BTRFS_DEV_ITEM_KEY 216
959 #define BTRFS_CHUNK_ITEM_KEY 228
962 * string items are for debugging. They just store a short string of
965 #define BTRFS_STRING_ITEM_KEY 253
967 #define BTRFS_MOUNT_NODATASUM (1 << 0)
968 #define BTRFS_MOUNT_NODATACOW (1 << 1)
969 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
970 #define BTRFS_MOUNT_SSD (1 << 3)
971 #define BTRFS_MOUNT_DEGRADED (1 << 4)
972 #define BTRFS_MOUNT_COMPRESS (1 << 5)
974 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
975 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
976 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
981 #define BTRFS_INODE_NODATASUM (1 << 0)
982 #define BTRFS_INODE_NODATACOW (1 << 1)
983 #define BTRFS_INODE_READONLY (1 << 2)
984 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
985 #define BTRFS_INODE_PREALLOC (1 << 4)
986 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
988 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
990 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
992 /* some macros to generate set/get funcs for the struct fields. This
993 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
996 #define le8_to_cpu(v) (v)
997 #define cpu_to_le8(v) (v)
1000 #define read_eb_member(eb, ptr, type, member, result) ( \
1001 read_extent_buffer(eb, (char *)(result), \
1002 ((unsigned long)(ptr)) + \
1003 offsetof(type, member), \
1004 sizeof(((type *)0)->member)))
1006 #define write_eb_member(eb, ptr, type, member, result) ( \
1007 write_extent_buffer(eb, (char *)(result), \
1008 ((unsigned long)(ptr)) + \
1009 offsetof(type, member), \
1010 sizeof(((type *)0)->member)))
1012 #ifndef BTRFS_SETGET_FUNCS
1013 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1014 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1015 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1018 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1019 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1021 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1022 u##bits res = le##bits##_to_cpu(p->member); \
1023 kunmap_atomic(p, KM_USER0); \
1026 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1029 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1030 p->member = cpu_to_le##bits(val); \
1031 kunmap_atomic(p, KM_USER0); \
1034 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1035 static inline u##bits btrfs_##name(type *s) \
1037 return le##bits##_to_cpu(s->member); \
1039 static inline void btrfs_set_##name(type *s, u##bits val) \
1041 s->member = cpu_to_le##bits(val); \
1044 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1045 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1046 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1047 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1048 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1049 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1051 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1052 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1053 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1054 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1055 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1056 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1058 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1059 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1061 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1063 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1065 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1067 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1069 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1070 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1072 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1074 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1076 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1079 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1081 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1084 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1086 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1089 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1090 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1091 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1092 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1093 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1094 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1095 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1096 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1097 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1098 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1099 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1101 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1103 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1106 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1107 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1108 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1110 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1112 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1114 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1116 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1117 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1119 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1121 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1122 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1124 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1127 unsigned long offset = (unsigned long)c;
1128 offset += offsetof(struct btrfs_chunk, stripe);
1129 offset += nr * sizeof(struct btrfs_stripe);
1130 return (struct btrfs_stripe *)offset;
1133 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1135 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1138 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1139 struct btrfs_chunk *c, int nr)
1141 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1144 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1145 struct btrfs_chunk *c, int nr,
1148 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1151 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1152 struct btrfs_chunk *c, int nr)
1154 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1157 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1158 struct btrfs_chunk *c, int nr,
1161 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1164 /* struct btrfs_block_group_item */
1165 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1167 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1169 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1170 struct btrfs_block_group_item, chunk_objectid, 64);
1172 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1173 struct btrfs_block_group_item, chunk_objectid, 64);
1174 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1175 struct btrfs_block_group_item, flags, 64);
1176 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1177 struct btrfs_block_group_item, flags, 64);
1179 /* struct btrfs_inode_ref */
1180 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1181 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1183 /* struct btrfs_inode_item */
1184 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1185 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1186 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1187 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1188 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1189 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1190 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1191 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1192 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1193 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1194 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1195 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1197 static inline struct btrfs_timespec *
1198 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1200 unsigned long ptr = (unsigned long)inode_item;
1201 ptr += offsetof(struct btrfs_inode_item, atime);
1202 return (struct btrfs_timespec *)ptr;
1205 static inline struct btrfs_timespec *
1206 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1208 unsigned long ptr = (unsigned long)inode_item;
1209 ptr += offsetof(struct btrfs_inode_item, mtime);
1210 return (struct btrfs_timespec *)ptr;
1213 static inline struct btrfs_timespec *
1214 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1216 unsigned long ptr = (unsigned long)inode_item;
1217 ptr += offsetof(struct btrfs_inode_item, ctime);
1218 return (struct btrfs_timespec *)ptr;
1221 static inline struct btrfs_timespec *
1222 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1224 unsigned long ptr = (unsigned long)inode_item;
1225 ptr += offsetof(struct btrfs_inode_item, otime);
1226 return (struct btrfs_timespec *)ptr;
1229 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1230 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1232 /* struct btrfs_dev_extent */
1233 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1235 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1236 chunk_objectid, 64);
1237 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1239 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1241 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1243 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1244 return (u8 *)((unsigned long)dev + ptr);
1247 /* struct btrfs_extent_ref */
1248 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1249 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1250 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1251 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1253 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1254 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1256 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1258 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1261 /* struct btrfs_extent_item */
1262 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1263 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1266 /* struct btrfs_node */
1267 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1268 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1270 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1273 ptr = offsetof(struct btrfs_node, ptrs) +
1274 sizeof(struct btrfs_key_ptr) * nr;
1275 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1278 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1282 ptr = offsetof(struct btrfs_node, ptrs) +
1283 sizeof(struct btrfs_key_ptr) * nr;
1284 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1287 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1290 ptr = offsetof(struct btrfs_node, ptrs) +
1291 sizeof(struct btrfs_key_ptr) * nr;
1292 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1295 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1299 ptr = offsetof(struct btrfs_node, ptrs) +
1300 sizeof(struct btrfs_key_ptr) * nr;
1301 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1304 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1306 return offsetof(struct btrfs_node, ptrs) +
1307 sizeof(struct btrfs_key_ptr) * nr;
1310 void btrfs_node_key(struct extent_buffer *eb,
1311 struct btrfs_disk_key *disk_key, int nr);
1313 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1314 struct btrfs_disk_key *disk_key, int nr)
1317 ptr = btrfs_node_key_ptr_offset(nr);
1318 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1319 struct btrfs_key_ptr, key, disk_key);
1322 /* struct btrfs_item */
1323 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1324 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1326 static inline unsigned long btrfs_item_nr_offset(int nr)
1328 return offsetof(struct btrfs_leaf, items) +
1329 sizeof(struct btrfs_item) * nr;
1332 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1335 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1338 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1339 struct btrfs_item *item)
1341 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1344 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1346 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1349 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1351 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1354 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1356 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1359 static inline void btrfs_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 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1366 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1367 struct btrfs_disk_key *disk_key, int nr)
1369 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1370 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1373 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1376 * struct btrfs_root_ref
1378 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1379 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1380 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1382 /* struct btrfs_dir_item */
1383 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1384 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1385 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1386 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1388 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1389 struct btrfs_dir_item *item,
1390 struct btrfs_disk_key *key)
1392 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1395 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1396 struct btrfs_dir_item *item,
1397 struct btrfs_disk_key *key)
1399 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1402 /* struct btrfs_disk_key */
1403 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1405 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1406 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1408 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1409 struct btrfs_disk_key *disk)
1411 cpu->offset = le64_to_cpu(disk->offset);
1412 cpu->type = disk->type;
1413 cpu->objectid = le64_to_cpu(disk->objectid);
1416 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1417 struct btrfs_key *cpu)
1419 disk->offset = cpu_to_le64(cpu->offset);
1420 disk->type = cpu->type;
1421 disk->objectid = cpu_to_le64(cpu->objectid);
1424 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1425 struct btrfs_key *key, int nr)
1427 struct btrfs_disk_key disk_key;
1428 btrfs_node_key(eb, &disk_key, nr);
1429 btrfs_disk_key_to_cpu(key, &disk_key);
1432 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1433 struct btrfs_key *key, int nr)
1435 struct btrfs_disk_key disk_key;
1436 btrfs_item_key(eb, &disk_key, nr);
1437 btrfs_disk_key_to_cpu(key, &disk_key);
1440 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1441 struct btrfs_dir_item *item,
1442 struct btrfs_key *key)
1444 struct btrfs_disk_key disk_key;
1445 btrfs_dir_item_key(eb, item, &disk_key);
1446 btrfs_disk_key_to_cpu(key, &disk_key);
1450 static inline u8 btrfs_key_type(struct btrfs_key *key)
1455 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1460 /* struct btrfs_header */
1461 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1462 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1464 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1465 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1466 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1467 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1469 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1471 return (btrfs_header_flags(eb) & flag) == flag;
1474 static inline int btrfs_set_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 int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1483 u64 flags = btrfs_header_flags(eb);
1484 btrfs_set_header_flags(eb, flags & ~flag);
1485 return (flags & flag) == flag;
1488 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1490 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1494 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1496 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1500 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1502 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1506 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1508 unsigned long ptr = offsetof(struct btrfs_header, csum);
1512 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1517 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1522 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1527 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1529 return btrfs_header_level(eb) == 0;
1532 /* struct btrfs_root_item */
1533 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1535 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1536 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1537 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1539 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1541 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1542 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1543 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1544 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1545 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1546 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1547 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1548 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1551 /* struct btrfs_super_block */
1553 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1554 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1555 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1557 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1558 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1559 struct btrfs_super_block, sys_chunk_array_size, 32);
1560 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1561 struct btrfs_super_block, chunk_root_generation, 64);
1562 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1564 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1566 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1567 chunk_root_level, 8);
1568 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1570 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1571 log_root_transid, 64);
1572 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1574 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1576 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1578 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1580 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1582 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1584 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1586 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1587 root_dir_objectid, 64);
1588 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1590 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1592 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1594 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1595 incompat_flags, 64);
1596 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1599 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1601 int t = btrfs_super_csum_type(s);
1602 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1603 return btrfs_csum_sizes[t];
1606 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1608 return offsetof(struct btrfs_leaf, items);
1611 /* struct btrfs_file_extent_item */
1612 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1614 static inline unsigned long
1615 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
1617 unsigned long offset = (unsigned long)e;
1618 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1622 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1624 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1627 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1629 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1631 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1632 disk_num_bytes, 64);
1633 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1635 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1637 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1639 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1641 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1643 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1644 other_encoding, 16);
1646 /* this returns the number of file bytes represented by the inline item.
1647 * If an item is compressed, this is the uncompressed size
1649 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1650 struct btrfs_file_extent_item *e)
1652 return btrfs_file_extent_ram_bytes(eb, e);
1656 * this returns the number of bytes used by the item on disk, minus the
1657 * size of any extent headers. If a file is compressed on disk, this is
1658 * the compressed size
1660 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1661 struct btrfs_item *e)
1663 unsigned long offset;
1664 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1665 return btrfs_item_size(eb, e) - offset;
1668 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1670 return sb->s_fs_info;
1673 static inline int btrfs_set_root_name(struct btrfs_root *root,
1674 const char *name, int len)
1676 /* if we already have a name just free it */
1679 root->name = kmalloc(len+1, GFP_KERNEL);
1683 memcpy(root->name, name, len);
1684 root->name[len] = '\0';
1689 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
1692 return root->leafsize;
1693 return root->nodesize;
1696 /* helper function to cast into the data area of the leaf. */
1697 #define btrfs_item_ptr(leaf, slot, type) \
1698 ((type *)(btrfs_leaf_data(leaf) + \
1699 btrfs_item_offset_nr(leaf, slot)))
1701 #define btrfs_item_ptr_offset(leaf, slot) \
1702 ((unsigned long)(btrfs_leaf_data(leaf) + \
1703 btrfs_item_offset_nr(leaf, slot)))
1705 static inline struct dentry *fdentry(struct file *file)
1707 return file->f_path.dentry;
1711 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
1712 struct btrfs_root *root, unsigned long count);
1713 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1714 int btrfs_update_pinned_extents(struct btrfs_root *root,
1715 u64 bytenr, u64 num, int pin);
1716 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1717 struct btrfs_root *root, struct extent_buffer *leaf);
1718 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1719 struct btrfs_root *root, u64 objectid, u64 bytenr);
1720 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1721 struct btrfs_block_group_cache *btrfs_lookup_block_group(
1722 struct btrfs_fs_info *info,
1724 u64 btrfs_find_block_group(struct btrfs_root *root,
1725 u64 search_start, u64 search_hint, int owner);
1726 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1727 struct btrfs_root *root,
1728 u32 blocksize, u64 parent,
1734 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1735 struct btrfs_root *root,
1736 u64 bytenr, u32 blocksize,
1738 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1739 struct btrfs_root *root,
1740 u64 num_bytes, u64 parent, u64 min_bytes,
1741 u64 root_objectid, u64 ref_generation,
1742 u64 owner, u64 empty_size, u64 hint_byte,
1743 u64 search_end, struct btrfs_key *ins, u64 data);
1744 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1745 struct btrfs_root *root, u64 parent,
1746 u64 root_objectid, u64 ref_generation,
1747 u64 owner, struct btrfs_key *ins);
1748 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1749 struct btrfs_root *root, u64 parent,
1750 u64 root_objectid, u64 ref_generation,
1751 u64 owner, struct btrfs_key *ins);
1752 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1753 struct btrfs_root *root,
1754 u64 num_bytes, u64 min_alloc_size,
1755 u64 empty_size, u64 hint_byte,
1756 u64 search_end, struct btrfs_key *ins,
1758 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1759 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1761 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1762 struct extent_buffer *buf, u32 nr_extents);
1763 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1764 struct btrfs_root *root, struct extent_buffer *orig_buf,
1765 struct extent_buffer *buf, int start_slot, int nr);
1766 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1767 struct btrfs_root *root,
1768 u64 bytenr, u64 num_bytes, u64 parent,
1769 u64 root_objectid, u64 ref_generation,
1770 u64 owner_objectid, int pin);
1771 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1772 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1773 struct btrfs_root *root,
1774 struct extent_io_tree *unpin);
1775 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1776 struct btrfs_root *root,
1777 u64 bytenr, u64 num_bytes, u64 parent,
1778 u64 root_objectid, u64 ref_generation,
1779 u64 owner_objectid);
1780 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1781 struct btrfs_root *root, u64 bytenr, u64 num_bytes,
1782 u64 orig_parent, u64 parent,
1783 u64 root_objectid, u64 ref_generation,
1784 u64 owner_objectid);
1785 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1786 struct btrfs_root *root);
1787 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
1788 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1789 int btrfs_read_block_groups(struct btrfs_root *root);
1790 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1791 struct btrfs_root *root, u64 bytes_used,
1792 u64 type, u64 chunk_objectid, u64 chunk_offset,
1794 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1795 struct btrfs_root *root, u64 group_start);
1796 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1797 int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
1798 struct btrfs_root *root);
1799 int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1800 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1801 struct btrfs_root *root,
1802 struct extent_buffer *buf, u64 orig_start);
1803 int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1804 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1805 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
1806 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
1807 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
1808 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
1810 int btrfs_check_metadata_free_space(struct btrfs_root *root);
1811 int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
1813 void btrfs_free_reserved_data_space(struct btrfs_root *root,
1814 struct inode *inode, u64 bytes);
1815 void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode,
1817 void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode,
1820 int btrfs_previous_item(struct btrfs_root *root,
1821 struct btrfs_path *path, u64 min_objectid,
1823 int btrfs_merge_path(struct btrfs_trans_handle *trans,
1824 struct btrfs_root *root,
1825 struct btrfs_key *node_keys,
1826 u64 *nodes, int lowest_level);
1827 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1828 struct btrfs_root *root, struct btrfs_path *path,
1829 struct btrfs_key *new_key);
1830 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1831 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1832 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1833 struct btrfs_key *key, int lowest_level,
1834 int cache_only, u64 min_trans);
1835 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1836 struct btrfs_key *max_key,
1837 struct btrfs_path *path, int cache_only,
1839 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1840 struct btrfs_root *root, struct extent_buffer *buf,
1841 struct extent_buffer *parent, int parent_slot,
1842 struct extent_buffer **cow_ret);
1843 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1844 struct btrfs_root *root,
1845 struct extent_buffer *buf,
1846 struct extent_buffer **cow_ret, u64 new_root_objectid);
1847 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1848 *root, struct btrfs_path *path, u32 data_size);
1849 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1850 struct btrfs_root *root,
1851 struct btrfs_path *path,
1852 u32 new_size, int from_end);
1853 int btrfs_split_item(struct btrfs_trans_handle *trans,
1854 struct btrfs_root *root,
1855 struct btrfs_path *path,
1856 struct btrfs_key *new_key,
1857 unsigned long split_offset);
1858 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1859 *root, struct btrfs_key *key, struct btrfs_path *p, int
1861 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1862 struct btrfs_root *root, struct extent_buffer *parent,
1863 int start_slot, int cache_only, u64 *last_ret,
1864 struct btrfs_key *progress);
1865 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1866 struct btrfs_path *btrfs_alloc_path(void);
1867 void btrfs_free_path(struct btrfs_path *p);
1868 void btrfs_set_path_blocking(struct btrfs_path *p);
1869 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
1871 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1872 struct btrfs_path *path, int slot, int nr);
1873 int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1874 struct btrfs_root *root,
1875 struct btrfs_path *path, u64 bytenr);
1876 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1877 struct btrfs_root *root,
1878 struct btrfs_path *path)
1880 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1883 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1884 *root, struct btrfs_key *key, void *data, u32 data_size);
1885 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
1886 struct btrfs_root *root,
1887 struct btrfs_path *path,
1888 struct btrfs_key *cpu_key, u32 *data_size,
1890 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1891 struct btrfs_root *root,
1892 struct btrfs_path *path,
1893 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1895 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1896 struct btrfs_root *root,
1897 struct btrfs_path *path,
1898 struct btrfs_key *key,
1901 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1904 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1905 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1906 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1907 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1909 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
1910 struct btrfs_root *root,
1911 struct extent_buffer *node,
1912 struct extent_buffer *parent);
1914 int btrfs_find_root_ref(struct btrfs_root *tree_root,
1915 struct btrfs_path *path,
1916 u64 root_id, u64 ref_id);
1917 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1918 struct btrfs_root *tree_root,
1919 u64 root_id, u8 type, u64 ref_id,
1920 u64 dirid, u64 sequence,
1921 const char *name, int name_len);
1922 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1923 struct btrfs_key *key);
1924 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1925 *root, struct btrfs_key *key, struct btrfs_root_item
1927 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1928 *root, struct btrfs_key *key, struct btrfs_root_item
1930 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1931 btrfs_root_item *item, struct btrfs_key *key);
1932 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1933 u64 *found_objectid);
1934 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1935 struct btrfs_root *latest_root);
1937 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
1938 struct btrfs_root *root, const char *name,
1939 int name_len, u64 dir,
1940 struct btrfs_key *location, u8 type, u64 index);
1941 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1942 struct btrfs_root *root,
1943 struct btrfs_path *path, u64 dir,
1944 const char *name, int name_len,
1946 struct btrfs_dir_item *
1947 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1948 struct btrfs_root *root,
1949 struct btrfs_path *path, u64 dir,
1950 u64 objectid, const char *name, int name_len,
1952 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1953 struct btrfs_path *path,
1954 const char *name, int name_len);
1955 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1956 struct btrfs_root *root,
1957 struct btrfs_path *path,
1958 struct btrfs_dir_item *di);
1959 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1960 struct btrfs_root *root, const char *name,
1961 u16 name_len, const void *data, u16 data_len,
1963 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1964 struct btrfs_root *root,
1965 struct btrfs_path *path, u64 dir,
1966 const char *name, u16 name_len,
1970 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1971 struct btrfs_root *root, u64 offset);
1972 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1973 struct btrfs_root *root, u64 offset);
1976 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1977 struct btrfs_root *fs_root,
1978 u64 dirid, u64 *objectid);
1979 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1982 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1983 struct btrfs_root *root,
1984 const char *name, int name_len,
1985 u64 inode_objectid, u64 ref_objectid, u64 index);
1986 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1987 struct btrfs_root *root,
1988 const char *name, int name_len,
1989 u64 inode_objectid, u64 ref_objectid, u64 *index);
1990 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1991 struct btrfs_root *root,
1992 struct btrfs_path *path, u64 objectid);
1993 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1994 *root, struct btrfs_path *path,
1995 struct btrfs_key *location, int mod);
1998 int btrfs_del_csums(struct btrfs_trans_handle *trans,
1999 struct btrfs_root *root, u64 bytenr, u64 len);
2000 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2001 struct bio *bio, u32 *dst);
2002 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2003 struct btrfs_root *root,
2004 u64 objectid, u64 pos,
2005 u64 disk_offset, u64 disk_num_bytes,
2006 u64 num_bytes, u64 offset, u64 ram_bytes,
2007 u8 compression, u8 encryption, u16 other_encoding);
2008 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2009 struct btrfs_root *root,
2010 struct btrfs_path *path, u64 objectid,
2011 u64 bytenr, int mod);
2012 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2013 struct btrfs_root *root,
2014 struct btrfs_ordered_sum *sums);
2015 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2016 struct bio *bio, u64 file_start, int contig);
2017 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2018 u64 start, unsigned long len);
2019 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2020 struct btrfs_root *root,
2021 struct btrfs_path *path,
2022 u64 bytenr, int cow);
2023 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2024 struct btrfs_root *root, struct btrfs_path *path,
2026 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2027 u64 end, struct list_head *list);
2030 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2031 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2032 #define ClearPageChecked ClearPageFsMisc
2033 #define SetPageChecked SetPageFsMisc
2034 #define PageChecked PageFsMisc
2037 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2038 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2039 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2040 struct btrfs_root *root,
2041 struct inode *dir, struct inode *inode,
2042 const char *name, int name_len);
2043 int btrfs_add_link(struct btrfs_trans_handle *trans,
2044 struct inode *parent_inode, struct inode *inode,
2045 const char *name, int name_len, int add_backref, u64 index);
2046 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2047 struct btrfs_root *root,
2048 struct inode *inode, u64 new_size,
2051 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
2052 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
2053 int btrfs_writepages(struct address_space *mapping,
2054 struct writeback_control *wbc);
2055 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2056 struct btrfs_root *new_root, struct dentry *dentry,
2057 u64 new_dirid, u64 alloc_hint);
2058 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2059 size_t size, struct bio *bio, unsigned long bio_flags);
2061 unsigned long btrfs_force_ra(struct address_space *mapping,
2062 struct file_ra_state *ra, struct file *file,
2063 pgoff_t offset, pgoff_t last_index);
2064 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
2065 int btrfs_readpage(struct file *file, struct page *page);
2066 void btrfs_delete_inode(struct inode *inode);
2067 void btrfs_put_inode(struct inode *inode);
2068 void btrfs_read_locked_inode(struct inode *inode);
2069 int btrfs_write_inode(struct inode *inode, int wait);
2070 void btrfs_dirty_inode(struct inode *inode);
2071 struct inode *btrfs_alloc_inode(struct super_block *sb);
2072 void btrfs_destroy_inode(struct inode *inode);
2073 int btrfs_init_cachep(void);
2074 void btrfs_destroy_cachep(void);
2075 long btrfs_ioctl_trans_end(struct file *file);
2076 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
2077 struct btrfs_root *root, int wait);
2078 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
2079 struct btrfs_root *root);
2080 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2081 struct btrfs_root *root, int *is_new);
2082 int btrfs_commit_write(struct file *file, struct page *page,
2083 unsigned from, unsigned to);
2084 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2085 size_t page_offset, u64 start, u64 end,
2087 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2088 struct btrfs_root *root,
2089 struct inode *inode);
2090 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2091 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2092 void btrfs_orphan_cleanup(struct btrfs_root *root);
2093 int btrfs_cont_expand(struct inode *inode, loff_t size);
2096 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2099 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
2100 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2102 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2103 extern struct file_operations btrfs_file_operations;
2104 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2105 struct btrfs_root *root, struct inode *inode,
2106 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
2107 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2108 struct btrfs_root *root,
2109 struct inode *inode, u64 start, u64 end);
2110 int btrfs_release_file(struct inode *inode, struct file *file);
2113 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2114 struct btrfs_root *root, int cache_only);
2117 int btrfs_init_sysfs(void);
2118 void btrfs_exit_sysfs(void);
2119 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2120 int btrfs_sysfs_add_root(struct btrfs_root *root);
2121 void btrfs_sysfs_del_root(struct btrfs_root *root);
2122 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2125 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2128 u64 btrfs_parse_size(char *str);
2129 int btrfs_parse_options(struct btrfs_root *root, char *options);
2130 int btrfs_sync_fs(struct super_block *sb, int wait);
2133 int btrfs_check_acl(struct inode *inode, int mask);
2134 int btrfs_init_acl(struct inode *inode, struct inode *dir);
2135 int btrfs_acl_chmod(struct inode *inode);
2137 /* free-space-cache.c */
2138 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
2139 u64 bytenr, u64 size);
2140 int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group,
2141 u64 offset, u64 bytes);
2142 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
2143 u64 bytenr, u64 size);
2144 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group,
2145 u64 offset, u64 bytes);
2146 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2148 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
2149 *block_group, u64 offset,
2151 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
2153 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);