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)
47 # define BTRFS_MAX_LEVEL 7
49 # define BTRFS_MAX_LEVEL 8
52 /* holds pointers to all of the tree roots */
53 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
55 /* stores information about which extents are in use, and reference counts */
56 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
59 * chunk tree stores translations from logical -> physical block numbering
60 * the super block points to the chunk tree
62 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
65 * stores information about which areas of a given device are in use.
66 * one per device. The tree of tree roots points to the device tree
68 #define BTRFS_DEV_TREE_OBJECTID 4ULL
70 /* one per subvolume, storing files and directories */
71 #define BTRFS_FS_TREE_OBJECTID 5ULL
73 /* directory objectid inside the root tree */
74 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
76 /* holds checksums of all the data extents */
77 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
79 /* orhpan objectid for tracking unlinked/truncated files */
80 #define BTRFS_ORPHAN_OBJECTID -5ULL
82 /* does write ahead logging to speed up fsyncs */
83 #define BTRFS_TREE_LOG_OBJECTID -6ULL
84 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
86 /* for space balancing */
87 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
88 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
91 * extent checksums all have this objectid
92 * this allows them to share the logging tree
95 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
97 /* dummy objectid represents multiple objectids */
98 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
101 * All files have objectids in this range.
103 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
104 #define BTRFS_LAST_FREE_OBJECTID -256ULL
105 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
109 * the device items go into the chunk tree. The key is in the form
110 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
112 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
115 * we can actually store much bigger names, but lets not confuse the rest
118 #define BTRFS_NAME_LEN 255
120 /* 32 bytes in various csum fields */
121 #define BTRFS_CSUM_SIZE 32
124 #define BTRFS_CSUM_TYPE_CRC32 0
126 static int btrfs_csum_sizes
[] = { 4, 0 };
128 /* four bytes for CRC32 */
129 #define BTRFS_EMPTY_DIR_SIZE 0
131 #define BTRFS_FT_UNKNOWN 0
132 #define BTRFS_FT_REG_FILE 1
133 #define BTRFS_FT_DIR 2
134 #define BTRFS_FT_CHRDEV 3
135 #define BTRFS_FT_BLKDEV 4
136 #define BTRFS_FT_FIFO 5
137 #define BTRFS_FT_SOCK 6
138 #define BTRFS_FT_SYMLINK 7
139 #define BTRFS_FT_XATTR 8
140 #define BTRFS_FT_MAX 9
143 * the key defines the order in the tree, and so it also defines (optimal)
144 * block layout. objectid corresonds to the inode number. The flags
145 * tells us things about the object, and is a kind of stream selector.
146 * so for a given inode, keys with flags of 1 might refer to the inode
147 * data, flags of 2 may point to file data in the btree and flags == 3
148 * may point to extents.
150 * offset is the starting byte offset for this key in the stream.
152 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
153 * in cpu native order. Otherwise they are identical and their sizes
154 * should be the same (ie both packed)
156 struct btrfs_disk_key
{
160 } __attribute__ ((__packed__
));
166 } __attribute__ ((__packed__
));
168 struct btrfs_mapping_tree
{
169 struct extent_map_tree map_tree
;
172 #define BTRFS_UUID_SIZE 16
173 struct btrfs_dev_item
{
174 /* the internal btrfs device id */
177 /* size of the device */
183 /* optimal io alignment for this device */
186 /* optimal io width for this device */
189 /* minimal io size for this device */
192 /* type and info about this device */
195 /* expected generation for this device */
199 * starting byte of this partition on the device,
200 * to allowr for stripe alignment in the future
204 /* grouping information for allocation decisions */
207 /* seek speed 0-100 where 100 is fastest */
210 /* bandwidth 0-100 where 100 is fastest */
213 /* btrfs generated uuid for this device */
214 u8 uuid
[BTRFS_UUID_SIZE
];
216 /* uuid of FS who owns this device */
217 u8 fsid
[BTRFS_UUID_SIZE
];
218 } __attribute__ ((__packed__
));
220 struct btrfs_stripe
{
223 u8 dev_uuid
[BTRFS_UUID_SIZE
];
224 } __attribute__ ((__packed__
));
227 /* size of this chunk in bytes */
230 /* objectid of the root referencing this chunk */
236 /* optimal io alignment for this chunk */
239 /* optimal io width for this chunk */
242 /* minimal io size for this chunk */
245 /* 2^16 stripes is quite a lot, a second limit is the size of a single
250 /* sub stripes only matter for raid10 */
252 struct btrfs_stripe stripe
;
253 /* additional stripes go here */
254 } __attribute__ ((__packed__
));
256 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
258 BUG_ON(num_stripes
== 0);
259 return sizeof(struct btrfs_chunk
) +
260 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
263 #define BTRFS_FSID_SIZE 16
264 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
267 * every tree block (leaf or node) starts with this header.
269 struct btrfs_header
{
270 /* these first four must match the super block */
271 u8 csum
[BTRFS_CSUM_SIZE
];
272 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
273 __le64 bytenr
; /* which block this node is supposed to live in */
276 /* allowed to be different from the super from here on down */
277 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
282 } __attribute__ ((__packed__
));
284 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
285 sizeof(struct btrfs_header)) / \
286 sizeof(struct btrfs_key_ptr))
287 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
288 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
289 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
290 sizeof(struct btrfs_item) - \
291 sizeof(struct btrfs_file_extent_item))
293 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
296 * this is a very generous portion of the super block, giving us
297 * room to translate 14 chunks with 3 stripes each.
299 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
300 #define BTRFS_LABEL_SIZE 256
303 * the super block basically lists the main trees of the FS
304 * it currently lacks any block count etc etc
306 struct btrfs_super_block
{
307 u8 csum
[BTRFS_CSUM_SIZE
];
308 /* the first 4 fields must match struct btrfs_header */
309 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
310 __le64 bytenr
; /* this block number */
313 /* allowed to be different from the btrfs_header from here own down */
320 /* this will help find the new super based on the log root */
321 __le64 log_root_transid
;
324 __le64 root_dir_objectid
;
330 __le32 sys_chunk_array_size
;
331 __le64 chunk_root_generation
;
333 __le64 compat_ro_flags
;
334 __le64 incompat_flags
;
339 struct btrfs_dev_item dev_item
;
341 char label
[BTRFS_LABEL_SIZE
];
343 /* future expansion */
345 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
346 } __attribute__ ((__packed__
));
349 * Compat flags that we support. If any incompat flags are set other than the
350 * ones specified below then we will fail to mount
352 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
353 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
354 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
357 * A leaf is full of items. offset and size tell us where to find
358 * the item in the leaf (relative to the start of the data area)
361 struct btrfs_disk_key key
;
364 } __attribute__ ((__packed__
));
367 * leaves have an item area and a data area:
368 * [item0, item1....itemN] [free space] [dataN...data1, data0]
370 * The data is separate from the items to get the keys closer together
374 struct btrfs_header header
;
375 struct btrfs_item items
[];
376 } __attribute__ ((__packed__
));
379 * all non-leaf blocks are nodes, they hold only keys and pointers to
382 struct btrfs_key_ptr
{
383 struct btrfs_disk_key key
;
386 } __attribute__ ((__packed__
));
389 struct btrfs_header header
;
390 struct btrfs_key_ptr ptrs
[];
391 } __attribute__ ((__packed__
));
394 * btrfs_paths remember the path taken from the root down to the leaf.
395 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
396 * to any other levels that are present.
398 * The slots array records the index of the item or block pointer
399 * used while walking the tree.
402 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
403 int slots
[BTRFS_MAX_LEVEL
];
404 /* if there is real range locking, this locks field will change */
405 int locks
[BTRFS_MAX_LEVEL
];
407 /* keep some upper locks as we walk down */
413 * set by btrfs_split_item, tells search_slot to keep all locks
414 * and to force calls to keep space in the nodes
416 int search_for_split
;
420 * items in the extent btree are used to record the objectid of the
421 * owner of the block and the number of references
423 struct btrfs_extent_item
{
425 } __attribute__ ((__packed__
));
427 struct btrfs_extent_ref
{
432 } __attribute__ ((__packed__
));
434 /* dev extents record free space on individual devices. The owner
435 * field points back to the chunk allocation mapping tree that allocated
436 * the extent. The chunk tree uuid field is a way to double check the owner
438 struct btrfs_dev_extent
{
440 __le64 chunk_objectid
;
443 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
444 } __attribute__ ((__packed__
));
446 struct btrfs_inode_ref
{
450 } __attribute__ ((__packed__
));
452 struct btrfs_timespec
{
455 } __attribute__ ((__packed__
));
458 BTRFS_COMPRESS_NONE
= 0,
459 BTRFS_COMPRESS_ZLIB
= 1,
460 BTRFS_COMPRESS_LAST
= 2,
461 } btrfs_compression_type
;
463 /* we don't understand any encryption methods right now */
465 BTRFS_ENCRYPTION_NONE
= 0,
466 BTRFS_ENCRYPTION_LAST
= 1,
467 } btrfs_encryption_type
;
469 struct btrfs_inode_item
{
470 /* nfs style generation number */
472 /* transid that last touched this inode */
484 /* modification sequence number for NFS */
488 * a little future expansion, for more than this we can
489 * just grow the inode item and version it
492 struct btrfs_timespec atime
;
493 struct btrfs_timespec ctime
;
494 struct btrfs_timespec mtime
;
495 struct btrfs_timespec otime
;
496 } __attribute__ ((__packed__
));
498 struct btrfs_dir_log_item
{
500 } __attribute__ ((__packed__
));
502 struct btrfs_dir_item
{
503 struct btrfs_disk_key location
;
508 } __attribute__ ((__packed__
));
510 struct btrfs_root_item
{
511 struct btrfs_inode_item inode
;
517 __le64 last_snapshot
;
520 struct btrfs_disk_key drop_progress
;
523 } __attribute__ ((__packed__
));
526 * this is used for both forward and backward root refs
528 struct btrfs_root_ref
{
532 } __attribute__ ((__packed__
));
534 #define BTRFS_FILE_EXTENT_INLINE 0
535 #define BTRFS_FILE_EXTENT_REG 1
536 #define BTRFS_FILE_EXTENT_PREALLOC 2
538 struct btrfs_file_extent_item
{
540 * transaction id that created this extent
544 * max number of bytes to hold this extent in ram
545 * when we split a compressed extent we can't know how big
546 * each of the resulting pieces will be. So, this is
547 * an upper limit on the size of the extent in ram instead of
553 * 32 bits for the various ways we might encode the data,
554 * including compression and encryption. If any of these
555 * are set to something a given disk format doesn't understand
556 * it is treated like an incompat flag for reading and writing,
561 __le16 other_encoding
; /* spare for later use */
563 /* are we inline data or a real extent? */
567 * disk space consumed by the extent, checksum blocks are included
571 __le64 disk_num_bytes
;
573 * the logical offset in file blocks (no csums)
574 * this extent record is for. This allows a file extent to point
575 * into the middle of an existing extent on disk, sharing it
576 * between two snapshots (useful if some bytes in the middle of the
577 * extent have changed
581 * the logical number of file blocks (no csums included). This
582 * always reflects the size uncompressed and without encoding.
586 } __attribute__ ((__packed__
));
588 struct btrfs_csum_item
{
590 } __attribute__ ((__packed__
));
592 /* different types of block groups (and chunks) */
593 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
594 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
595 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
596 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
597 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
598 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
599 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
601 struct btrfs_block_group_item
{
603 __le64 chunk_objectid
;
605 } __attribute__ ((__packed__
));
607 struct btrfs_space_info
{
616 struct list_head list
;
618 /* for block groups in our same type */
619 struct list_head block_groups
;
621 struct rw_semaphore groups_sem
;
624 struct btrfs_free_space
{
625 struct rb_node bytes_index
;
626 struct rb_node offset_index
;
631 struct btrfs_block_group_cache
{
632 struct btrfs_key key
;
633 struct btrfs_block_group_item item
;
635 struct mutex alloc_mutex
;
636 struct mutex cache_mutex
;
644 struct btrfs_space_info
*space_info
;
646 /* free space cache stuff */
647 struct rb_root free_space_bytes
;
648 struct rb_root free_space_offset
;
650 /* block group cache stuff */
651 struct rb_node cache_node
;
653 /* for block groups in the same raid type */
654 struct list_head list
;
660 struct btrfs_leaf_ref_tree
{
662 struct list_head list
;
667 struct btrfs_fs_devices
;
668 struct btrfs_fs_info
{
669 u8 fsid
[BTRFS_FSID_SIZE
];
670 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
671 struct btrfs_root
*extent_root
;
672 struct btrfs_root
*tree_root
;
673 struct btrfs_root
*chunk_root
;
674 struct btrfs_root
*dev_root
;
675 struct btrfs_root
*fs_root
;
676 struct btrfs_root
*csum_root
;
678 /* the log root tree is a directory of all the other log roots */
679 struct btrfs_root
*log_root_tree
;
680 struct radix_tree_root fs_roots_radix
;
682 /* block group cache stuff */
683 spinlock_t block_group_cache_lock
;
684 struct rb_root block_group_cache_tree
;
686 struct extent_io_tree pinned_extents
;
687 struct extent_io_tree pending_del
;
688 struct extent_io_tree extent_ins
;
690 /* logical->physical extent mapping */
691 struct btrfs_mapping_tree mapping_tree
;
694 u64 last_trans_committed
;
695 u64 last_trans_new_blockgroup
;
696 u64 open_ioctl_trans
;
697 unsigned long mount_opt
;
701 struct btrfs_transaction
*running_transaction
;
702 wait_queue_head_t transaction_throttle
;
703 wait_queue_head_t transaction_wait
;
705 wait_queue_head_t async_submit_wait
;
706 wait_queue_head_t tree_log_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 spinlock_t hash_lock
;
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 extent_ins_mutex
;
720 struct mutex pinned_mutex
;
721 struct mutex chunk_mutex
;
722 struct mutex drop_mutex
;
723 struct mutex volume_mutex
;
724 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
;
733 atomic_t tree_log_writers
;
734 atomic_t tree_log_commit
;
735 unsigned long tree_log_batch
;
736 u64 tree_log_transid
;
739 * this is used by the balancing code to wait for all the pending
742 spinlock_t ordered_extent_lock
;
743 struct list_head ordered_extents
;
744 struct list_head delalloc_inodes
;
747 * there is a pool of worker threads for checksumming during writes
748 * and a pool for checksumming after reads. This is because readers
749 * can run with FS locks held, and the writers may be waiting for
750 * those locks. We don't want ordering in the pending list to cause
751 * deadlocks, and so the two are serviced separately.
753 * A third pool does submit_bio to avoid deadlocking with the other
756 struct btrfs_workers workers
;
757 struct btrfs_workers delalloc_workers
;
758 struct btrfs_workers endio_workers
;
759 struct btrfs_workers endio_meta_workers
;
760 struct btrfs_workers endio_meta_write_workers
;
761 struct btrfs_workers endio_write_workers
;
762 struct btrfs_workers submit_workers
;
764 * fixup workers take dirty pages that didn't properly go through
765 * the cow mechanism and make them safe to write. It happens
766 * for the sys_munmap function call path
768 struct btrfs_workers fixup_workers
;
769 struct task_struct
*transaction_kthread
;
770 struct task_struct
*cleaner_kthread
;
771 int thread_pool_size
;
773 /* tree relocation relocated fields */
774 struct list_head dead_reloc_roots
;
775 struct btrfs_leaf_ref_tree reloc_ref_tree
;
776 struct btrfs_leaf_ref_tree shared_ref_tree
;
778 struct kobject super_kobj
;
779 struct completion kobj_unregister
;
782 int log_root_recovering
;
784 atomic_t throttle_gen
;
787 struct list_head dirty_cowonly_roots
;
789 struct btrfs_fs_devices
*fs_devices
;
790 struct list_head space_info
;
791 spinlock_t delalloc_lock
;
792 spinlock_t new_trans_lock
;
797 spinlock_t ref_cache_lock
;
798 u64 total_ref_cache_size
;
800 u64 avail_data_alloc_bits
;
801 u64 avail_metadata_alloc_bits
;
802 u64 avail_system_alloc_bits
;
803 u64 data_alloc_profile
;
804 u64 metadata_alloc_profile
;
805 u64 system_alloc_profile
;
811 * in ram representation of the tree. extent_root is used for all allocations
812 * and for the extent tree extent_root root.
814 struct btrfs_dirty_root
;
816 struct extent_buffer
*node
;
818 /* the node lock is held while changing the node pointer */
819 spinlock_t node_lock
;
821 struct extent_buffer
*commit_root
;
822 struct btrfs_leaf_ref_tree
*ref_tree
;
823 struct btrfs_leaf_ref_tree ref_tree_struct
;
824 struct btrfs_dirty_root
*dirty_root
;
825 struct btrfs_root
*log_root
;
826 struct btrfs_root
*reloc_root
;
828 struct btrfs_root_item root_item
;
829 struct btrfs_key root_key
;
830 struct btrfs_fs_info
*fs_info
;
831 struct extent_io_tree dirty_log_pages
;
833 struct kobject root_kobj
;
834 struct completion kobj_unregister
;
835 struct mutex objectid_mutex
;
836 struct mutex log_mutex
;
841 /* data allocations are done in sectorsize units */
844 /* node allocations are done in nodesize units */
847 /* leaf allocations are done in leafsize units */
854 u64 last_inode_alloc
;
857 u64 defrag_trans_start
;
858 struct btrfs_key defrag_progress
;
859 struct btrfs_key defrag_max
;
865 /* the dirty list is only used by non-reference counted roots */
866 struct list_head dirty_list
;
868 spinlock_t list_lock
;
869 struct list_head dead_list
;
870 struct list_head orphan_list
;
873 * right now this just gets used so that a root has its own devid
874 * for stat. It may be used for more later
876 struct super_block anon_super
;
881 * inode items have the data typically returned from stat and store other
882 * info about object characteristics. There is one for every file and dir in
885 #define BTRFS_INODE_ITEM_KEY 1
886 #define BTRFS_INODE_REF_KEY 12
887 #define BTRFS_XATTR_ITEM_KEY 24
888 #define BTRFS_ORPHAN_ITEM_KEY 48
889 /* reserve 2-15 close to the inode for later flexibility */
892 * dir items are the name -> inode pointers in a directory. There is one
893 * for every name in a directory.
895 #define BTRFS_DIR_LOG_ITEM_KEY 60
896 #define BTRFS_DIR_LOG_INDEX_KEY 72
897 #define BTRFS_DIR_ITEM_KEY 84
898 #define BTRFS_DIR_INDEX_KEY 96
900 * extent data is for file data
902 #define BTRFS_EXTENT_DATA_KEY 108
905 * extent csums are stored in a separate tree and hold csums for
906 * an entire extent on disk.
908 #define BTRFS_EXTENT_CSUM_KEY 128
911 * root items point to tree roots. There are typically in the root
912 * tree used by the super block to find all the other trees
914 #define BTRFS_ROOT_ITEM_KEY 132
917 * root backrefs tie subvols and snapshots to the directory entries that
920 #define BTRFS_ROOT_BACKREF_KEY 144
923 * root refs make a fast index for listing all of the snapshots and
924 * subvolumes referenced by a given root. They point directly to the
925 * directory item in the root that references the subvol
927 #define BTRFS_ROOT_REF_KEY 156
930 * extent items are in the extent map tree. These record which blocks
931 * are used, and how many references there are to each block
933 #define BTRFS_EXTENT_ITEM_KEY 168
934 #define BTRFS_EXTENT_REF_KEY 180
937 * block groups give us hints into the extent allocation trees. Which
938 * blocks are free etc etc
940 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
942 #define BTRFS_DEV_EXTENT_KEY 204
943 #define BTRFS_DEV_ITEM_KEY 216
944 #define BTRFS_CHUNK_ITEM_KEY 228
947 * string items are for debugging. They just store a short string of
950 #define BTRFS_STRING_ITEM_KEY 253
952 #define BTRFS_MOUNT_NODATASUM (1 << 0)
953 #define BTRFS_MOUNT_NODATACOW (1 << 1)
954 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
955 #define BTRFS_MOUNT_SSD (1 << 3)
956 #define BTRFS_MOUNT_DEGRADED (1 << 4)
957 #define BTRFS_MOUNT_COMPRESS (1 << 5)
959 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
960 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
961 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
966 #define BTRFS_INODE_NODATASUM (1 << 0)
967 #define BTRFS_INODE_NODATACOW (1 << 1)
968 #define BTRFS_INODE_READONLY (1 << 2)
969 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
970 #define BTRFS_INODE_PREALLOC (1 << 4)
971 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
973 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
975 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
977 /* some macros to generate set/get funcs for the struct fields. This
978 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
981 #define le8_to_cpu(v) (v)
982 #define cpu_to_le8(v) (v)
985 #define read_eb_member(eb, ptr, type, member, result) ( \
986 read_extent_buffer(eb, (char *)(result), \
987 ((unsigned long)(ptr)) + \
988 offsetof(type, member), \
989 sizeof(((type *)0)->member)))
991 #define write_eb_member(eb, ptr, type, member, result) ( \
992 write_extent_buffer(eb, (char *)(result), \
993 ((unsigned long)(ptr)) + \
994 offsetof(type, member), \
995 sizeof(((type *)0)->member)))
997 #ifndef BTRFS_SETGET_FUNCS
998 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
999 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1000 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1003 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1004 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1006 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1007 u##bits res = le##bits##_to_cpu(p->member); \
1008 kunmap_atomic(p, KM_USER0); \
1011 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1014 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1015 p->member = cpu_to_le##bits(val); \
1016 kunmap_atomic(p, KM_USER0); \
1019 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1020 static inline u##bits btrfs_##name(type *s) \
1022 return le##bits##_to_cpu(s->member); \
1024 static inline void btrfs_set_##name(type *s, u##bits val) \
1026 s->member = cpu_to_le##bits(val); \
1029 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1030 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1031 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1032 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1033 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1034 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1036 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1037 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1038 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1039 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1040 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1041 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1043 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1044 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1046 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1048 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1050 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1052 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1054 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1055 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1057 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1059 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1061 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1064 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1066 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1069 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1071 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1074 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1075 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1076 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1077 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1078 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1079 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1080 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1081 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1082 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1083 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1084 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1086 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1088 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1091 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1092 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1093 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1095 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1097 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1099 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1101 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1102 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1104 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1106 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1107 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1109 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1112 unsigned long offset
= (unsigned long)c
;
1113 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1114 offset
+= nr
* sizeof(struct btrfs_stripe
);
1115 return (struct btrfs_stripe
*)offset
;
1118 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1120 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1123 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1124 struct btrfs_chunk
*c
, int nr
)
1126 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1129 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1130 struct btrfs_chunk
*c
, int nr
,
1133 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1136 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1137 struct btrfs_chunk
*c
, int nr
)
1139 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1142 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1143 struct btrfs_chunk
*c
, int nr
,
1146 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1149 /* struct btrfs_block_group_item */
1150 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1152 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1154 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1155 struct btrfs_block_group_item
, chunk_objectid
, 64);
1157 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1158 struct btrfs_block_group_item
, chunk_objectid
, 64);
1159 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1160 struct btrfs_block_group_item
, flags
, 64);
1161 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1162 struct btrfs_block_group_item
, flags
, 64);
1164 /* struct btrfs_inode_ref */
1165 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1166 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1168 /* struct btrfs_inode_item */
1169 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1170 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1171 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1172 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1173 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1174 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1175 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1176 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1177 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1178 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1179 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1180 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1182 static inline struct btrfs_timespec
*
1183 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1185 unsigned long ptr
= (unsigned long)inode_item
;
1186 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1187 return (struct btrfs_timespec
*)ptr
;
1190 static inline struct btrfs_timespec
*
1191 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1193 unsigned long ptr
= (unsigned long)inode_item
;
1194 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1195 return (struct btrfs_timespec
*)ptr
;
1198 static inline struct btrfs_timespec
*
1199 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1201 unsigned long ptr
= (unsigned long)inode_item
;
1202 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1203 return (struct btrfs_timespec
*)ptr
;
1206 static inline struct btrfs_timespec
*
1207 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1209 unsigned long ptr
= (unsigned long)inode_item
;
1210 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1211 return (struct btrfs_timespec
*)ptr
;
1214 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1215 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1217 /* struct btrfs_dev_extent */
1218 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1220 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1221 chunk_objectid
, 64);
1222 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1224 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1226 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1228 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1229 return (u8
*)((unsigned long)dev
+ ptr
);
1232 /* struct btrfs_extent_ref */
1233 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1234 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1235 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1236 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1238 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1239 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1241 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1243 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1246 /* struct btrfs_extent_item */
1247 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1248 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1251 /* struct btrfs_node */
1252 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1253 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1255 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1258 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1259 sizeof(struct btrfs_key_ptr
) * nr
;
1260 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1263 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1267 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1268 sizeof(struct btrfs_key_ptr
) * nr
;
1269 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1272 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1275 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1276 sizeof(struct btrfs_key_ptr
) * nr
;
1277 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1280 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1284 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1285 sizeof(struct btrfs_key_ptr
) * nr
;
1286 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1289 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1291 return offsetof(struct btrfs_node
, ptrs
) +
1292 sizeof(struct btrfs_key_ptr
) * nr
;
1295 void btrfs_node_key(struct extent_buffer
*eb
,
1296 struct btrfs_disk_key
*disk_key
, int nr
);
1298 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1299 struct btrfs_disk_key
*disk_key
, int nr
)
1302 ptr
= btrfs_node_key_ptr_offset(nr
);
1303 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1304 struct btrfs_key_ptr
, key
, disk_key
);
1307 /* struct btrfs_item */
1308 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1309 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1311 static inline unsigned long btrfs_item_nr_offset(int nr
)
1313 return offsetof(struct btrfs_leaf
, items
) +
1314 sizeof(struct btrfs_item
) * nr
;
1317 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1320 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1323 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1324 struct btrfs_item
*item
)
1326 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1329 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1331 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1334 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1336 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1339 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1341 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1344 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1345 struct btrfs_disk_key
*disk_key
, int nr
)
1347 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1348 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1351 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1352 struct btrfs_disk_key
*disk_key
, int nr
)
1354 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1355 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1358 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1361 * struct btrfs_root_ref
1363 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1364 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1365 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1367 /* struct btrfs_dir_item */
1368 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1369 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1370 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1371 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1373 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1374 struct btrfs_dir_item
*item
,
1375 struct btrfs_disk_key
*key
)
1377 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1380 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1381 struct btrfs_dir_item
*item
,
1382 struct btrfs_disk_key
*key
)
1384 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1387 /* struct btrfs_disk_key */
1388 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1390 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1391 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1393 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1394 struct btrfs_disk_key
*disk
)
1396 cpu
->offset
= le64_to_cpu(disk
->offset
);
1397 cpu
->type
= disk
->type
;
1398 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1401 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1402 struct btrfs_key
*cpu
)
1404 disk
->offset
= cpu_to_le64(cpu
->offset
);
1405 disk
->type
= cpu
->type
;
1406 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1409 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1410 struct btrfs_key
*key
, int nr
)
1412 struct btrfs_disk_key disk_key
;
1413 btrfs_node_key(eb
, &disk_key
, nr
);
1414 btrfs_disk_key_to_cpu(key
, &disk_key
);
1417 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1418 struct btrfs_key
*key
, int nr
)
1420 struct btrfs_disk_key disk_key
;
1421 btrfs_item_key(eb
, &disk_key
, nr
);
1422 btrfs_disk_key_to_cpu(key
, &disk_key
);
1425 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1426 struct btrfs_dir_item
*item
,
1427 struct btrfs_key
*key
)
1429 struct btrfs_disk_key disk_key
;
1430 btrfs_dir_item_key(eb
, item
, &disk_key
);
1431 btrfs_disk_key_to_cpu(key
, &disk_key
);
1435 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1440 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1445 /* struct btrfs_header */
1446 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1447 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1449 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1450 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1451 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1452 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1454 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1456 return (btrfs_header_flags(eb
) & flag
) == flag
;
1459 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1461 u64 flags
= btrfs_header_flags(eb
);
1462 btrfs_set_header_flags(eb
, flags
| flag
);
1463 return (flags
& flag
) == flag
;
1466 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1468 u64 flags
= btrfs_header_flags(eb
);
1469 btrfs_set_header_flags(eb
, flags
& ~flag
);
1470 return (flags
& flag
) == flag
;
1473 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1475 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1479 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1481 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1485 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1487 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1491 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1493 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1497 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1502 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1507 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1512 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1514 return btrfs_header_level(eb
) == 0;
1517 /* struct btrfs_root_item */
1518 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1520 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1521 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1522 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1524 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1526 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1527 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1528 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1529 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1530 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1531 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1532 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1533 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1536 /* struct btrfs_super_block */
1538 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1539 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1540 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1542 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1543 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1544 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1545 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1546 struct btrfs_super_block
, chunk_root_generation
, 64);
1547 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1549 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1551 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1552 chunk_root_level
, 8);
1553 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1555 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1556 log_root_transid
, 64);
1557 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1559 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1561 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1563 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1565 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1567 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1569 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1571 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1572 root_dir_objectid
, 64);
1573 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1575 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1577 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1579 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1580 incompat_flags
, 64);
1581 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1584 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1586 int t
= btrfs_super_csum_type(s
);
1587 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1588 return btrfs_csum_sizes
[t
];
1591 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1593 return offsetof(struct btrfs_leaf
, items
);
1596 /* struct btrfs_file_extent_item */
1597 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1599 static inline unsigned long
1600 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1602 unsigned long offset
= (unsigned long)e
;
1603 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1607 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1609 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1612 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1614 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1616 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1617 disk_num_bytes
, 64);
1618 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1620 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1622 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1624 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1626 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1628 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1629 other_encoding
, 16);
1631 /* this returns the number of file bytes represented by the inline item.
1632 * If an item is compressed, this is the uncompressed size
1634 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1635 struct btrfs_file_extent_item
*e
)
1637 return btrfs_file_extent_ram_bytes(eb
, e
);
1641 * this returns the number of bytes used by the item on disk, minus the
1642 * size of any extent headers. If a file is compressed on disk, this is
1643 * the compressed size
1645 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1646 struct btrfs_item
*e
)
1648 unsigned long offset
;
1649 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1650 return btrfs_item_size(eb
, e
) - offset
;
1653 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1655 return sb
->s_fs_info
;
1658 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1659 const char *name
, int len
)
1661 /* if we already have a name just free it */
1664 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1668 memcpy(root
->name
, name
, len
);
1669 root
->name
[len
] = '\0';
1674 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
1677 return root
->leafsize
;
1678 return root
->nodesize
;
1681 /* helper function to cast into the data area of the leaf. */
1682 #define btrfs_item_ptr(leaf, slot, type) \
1683 ((type *)(btrfs_leaf_data(leaf) + \
1684 btrfs_item_offset_nr(leaf, slot)))
1686 #define btrfs_item_ptr_offset(leaf, slot) \
1687 ((unsigned long)(btrfs_leaf_data(leaf) + \
1688 btrfs_item_offset_nr(leaf, slot)))
1690 static inline struct dentry
*fdentry(struct file
*file
)
1692 return file
->f_path
.dentry
;
1696 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1697 int btrfs_lookup_extent_ref(struct btrfs_trans_handle
*trans
,
1698 struct btrfs_root
*root
, u64 bytenr
,
1699 u64 num_bytes
, u32
*refs
);
1700 int btrfs_update_pinned_extents(struct btrfs_root
*root
,
1701 u64 bytenr
, u64 num
, int pin
);
1702 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1703 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1704 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
1705 struct btrfs_root
*root
, u64 objectid
, u64 bytenr
);
1706 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1707 struct btrfs_root
*root
);
1708 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1709 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
1710 struct btrfs_fs_info
*info
,
1712 u64
btrfs_find_block_group(struct btrfs_root
*root
,
1713 u64 search_start
, u64 search_hint
, int owner
);
1714 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1715 struct btrfs_root
*root
,
1716 u32 blocksize
, u64 parent
,
1722 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1723 struct btrfs_root
*root
,
1724 u64 bytenr
, u32 blocksize
);
1725 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1726 struct btrfs_root
*root
,
1727 u64 num_bytes
, u64 parent
, u64 min_bytes
,
1728 u64 root_objectid
, u64 ref_generation
,
1729 u64 owner
, u64 empty_size
, u64 hint_byte
,
1730 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1731 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle
*trans
,
1732 struct btrfs_root
*root
, u64 parent
,
1733 u64 root_objectid
, u64 ref_generation
,
1734 u64 owner
, struct btrfs_key
*ins
);
1735 int btrfs_alloc_logged_extent(struct btrfs_trans_handle
*trans
,
1736 struct btrfs_root
*root
, u64 parent
,
1737 u64 root_objectid
, u64 ref_generation
,
1738 u64 owner
, struct btrfs_key
*ins
);
1739 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1740 struct btrfs_root
*root
,
1741 u64 num_bytes
, u64 min_alloc_size
,
1742 u64 empty_size
, u64 hint_byte
,
1743 u64 search_end
, struct btrfs_key
*ins
,
1745 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1746 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1748 int btrfs_cache_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1749 struct extent_buffer
*buf
, u32 nr_extents
);
1750 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1751 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1752 struct extent_buffer
*buf
, int start_slot
, int nr
);
1753 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1754 struct btrfs_root
*root
,
1755 u64 bytenr
, u64 num_bytes
, u64 parent
,
1756 u64 root_objectid
, u64 ref_generation
,
1757 u64 owner_objectid
, int pin
);
1758 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1759 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1760 struct btrfs_root
*root
,
1761 struct extent_io_tree
*unpin
);
1762 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1763 struct btrfs_root
*root
,
1764 u64 bytenr
, u64 num_bytes
, u64 parent
,
1765 u64 root_objectid
, u64 ref_generation
,
1766 u64 owner_objectid
);
1767 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1768 struct btrfs_root
*root
, u64 bytenr
,
1769 u64 orig_parent
, u64 parent
,
1770 u64 root_objectid
, u64 ref_generation
,
1771 u64 owner_objectid
);
1772 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1773 struct btrfs_root
*root
);
1774 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
1775 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1776 int btrfs_read_block_groups(struct btrfs_root
*root
);
1777 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1778 struct btrfs_root
*root
, u64 bytes_used
,
1779 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1781 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
1782 struct btrfs_root
*root
, u64 group_start
);
1783 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
1784 int btrfs_free_reloc_root(struct btrfs_trans_handle
*trans
,
1785 struct btrfs_root
*root
);
1786 int btrfs_drop_dead_reloc_roots(struct btrfs_root
*root
);
1787 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle
*trans
,
1788 struct btrfs_root
*root
,
1789 struct extent_buffer
*buf
, u64 orig_start
);
1790 int btrfs_add_dead_reloc_root(struct btrfs_root
*root
);
1791 int btrfs_cleanup_reloc_trees(struct btrfs_root
*root
);
1792 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
1793 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
1795 int btrfs_previous_item(struct btrfs_root
*root
,
1796 struct btrfs_path
*path
, u64 min_objectid
,
1798 int btrfs_merge_path(struct btrfs_trans_handle
*trans
,
1799 struct btrfs_root
*root
,
1800 struct btrfs_key
*node_keys
,
1801 u64
*nodes
, int lowest_level
);
1802 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1803 struct btrfs_root
*root
, struct btrfs_path
*path
,
1804 struct btrfs_key
*new_key
);
1805 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1806 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1807 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1808 struct btrfs_key
*key
, int lowest_level
,
1809 int cache_only
, u64 min_trans
);
1810 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1811 struct btrfs_key
*max_key
,
1812 struct btrfs_path
*path
, int cache_only
,
1814 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1815 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1816 struct extent_buffer
*parent
, int parent_slot
,
1817 struct extent_buffer
**cow_ret
, u64 prealloc_dest
);
1818 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1819 struct btrfs_root
*root
,
1820 struct extent_buffer
*buf
,
1821 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1822 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1823 *root
, struct btrfs_path
*path
, u32 data_size
);
1824 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1825 struct btrfs_root
*root
,
1826 struct btrfs_path
*path
,
1827 u32 new_size
, int from_end
);
1828 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
1829 struct btrfs_root
*root
,
1830 struct btrfs_path
*path
,
1831 struct btrfs_key
*new_key
,
1832 unsigned long split_offset
);
1833 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1834 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1836 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1837 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1838 int start_slot
, int cache_only
, u64
*last_ret
,
1839 struct btrfs_key
*progress
);
1840 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1841 struct btrfs_path
*btrfs_alloc_path(void);
1842 void btrfs_free_path(struct btrfs_path
*p
);
1843 void btrfs_init_path(struct btrfs_path
*p
);
1844 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1845 struct btrfs_path
*path
, int slot
, int nr
);
1846 int btrfs_del_leaf(struct btrfs_trans_handle
*trans
,
1847 struct btrfs_root
*root
,
1848 struct btrfs_path
*path
, u64 bytenr
);
1849 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1850 struct btrfs_root
*root
,
1851 struct btrfs_path
*path
)
1853 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1856 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1857 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1858 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
1859 struct btrfs_root
*root
,
1860 struct btrfs_path
*path
,
1861 struct btrfs_key
*cpu_key
, u32
*data_size
,
1863 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1864 struct btrfs_root
*root
,
1865 struct btrfs_path
*path
,
1866 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1868 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1869 struct btrfs_root
*root
,
1870 struct btrfs_path
*path
,
1871 struct btrfs_key
*key
,
1874 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1877 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1878 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1879 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1880 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1882 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
1883 struct btrfs_root
*root
,
1884 struct extent_buffer
*node
,
1885 struct extent_buffer
*parent
);
1887 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
1888 struct btrfs_path
*path
,
1889 u64 root_id
, u64 ref_id
);
1890 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
1891 struct btrfs_root
*tree_root
,
1892 u64 root_id
, u8 type
, u64 ref_id
,
1893 u64 dirid
, u64 sequence
,
1894 const char *name
, int name_len
);
1895 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1896 struct btrfs_key
*key
);
1897 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1898 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1900 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1901 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1903 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1904 btrfs_root_item
*item
, struct btrfs_key
*key
);
1905 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
1906 u64
*found_objectid
);
1907 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1908 struct btrfs_root
*latest_root
);
1910 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
1911 struct btrfs_root
*root
, const char *name
,
1912 int name_len
, u64 dir
,
1913 struct btrfs_key
*location
, u8 type
, u64 index
);
1914 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1915 struct btrfs_root
*root
,
1916 struct btrfs_path
*path
, u64 dir
,
1917 const char *name
, int name_len
,
1919 struct btrfs_dir_item
*
1920 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1921 struct btrfs_root
*root
,
1922 struct btrfs_path
*path
, u64 dir
,
1923 u64 objectid
, const char *name
, int name_len
,
1925 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1926 struct btrfs_path
*path
,
1927 const char *name
, int name_len
);
1928 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1929 struct btrfs_root
*root
,
1930 struct btrfs_path
*path
,
1931 struct btrfs_dir_item
*di
);
1932 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1933 struct btrfs_root
*root
, const char *name
,
1934 u16 name_len
, const void *data
, u16 data_len
,
1936 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1937 struct btrfs_root
*root
,
1938 struct btrfs_path
*path
, u64 dir
,
1939 const char *name
, u16 name_len
,
1943 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
1944 struct btrfs_root
*root
, u64 offset
);
1945 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
1946 struct btrfs_root
*root
, u64 offset
);
1949 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1950 struct btrfs_root
*fs_root
,
1951 u64 dirid
, u64
*objectid
);
1952 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1955 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1956 struct btrfs_root
*root
,
1957 const char *name
, int name_len
,
1958 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1959 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1960 struct btrfs_root
*root
,
1961 const char *name
, int name_len
,
1962 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
1963 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1964 struct btrfs_root
*root
,
1965 struct btrfs_path
*path
, u64 objectid
);
1966 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1967 *root
, struct btrfs_path
*path
,
1968 struct btrfs_key
*location
, int mod
);
1971 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
1972 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
1973 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
1974 struct bio
*bio
, u32
*dst
);
1975 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1976 struct btrfs_root
*root
,
1977 u64 objectid
, u64 pos
,
1978 u64 disk_offset
, u64 disk_num_bytes
,
1979 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
1980 u8 compression
, u8 encryption
, u16 other_encoding
);
1981 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1982 struct btrfs_root
*root
,
1983 struct btrfs_path
*path
, u64 objectid
,
1984 u64 bytenr
, int mod
);
1985 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1986 struct btrfs_root
*root
,
1987 struct btrfs_ordered_sum
*sums
);
1988 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
1989 struct bio
*bio
, u64 file_start
, int contig
);
1990 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
1991 u64 start
, unsigned long len
);
1992 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1993 struct btrfs_root
*root
,
1994 struct btrfs_path
*path
,
1995 u64 bytenr
, int cow
);
1996 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1997 struct btrfs_root
*root
, struct btrfs_path
*path
,
1999 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2000 u64 end
, struct list_head
*list
);
2003 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2004 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2005 #define ClearPageChecked ClearPageFsMisc
2006 #define SetPageChecked SetPageFsMisc
2007 #define PageChecked PageFsMisc
2010 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2011 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2012 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2013 struct btrfs_root
*root
,
2014 struct inode
*dir
, struct inode
*inode
,
2015 const char *name
, int name_len
);
2016 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2017 struct inode
*parent_inode
, struct inode
*inode
,
2018 const char *name
, int name_len
, int add_backref
, u64 index
);
2019 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2020 struct btrfs_root
*root
,
2021 struct inode
*inode
, u64 new_size
,
2024 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
);
2025 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
2026 int btrfs_writepages(struct address_space
*mapping
,
2027 struct writeback_control
*wbc
);
2028 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2029 struct btrfs_root
*new_root
, struct dentry
*dentry
,
2030 u64 new_dirid
, u64 alloc_hint
);
2031 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2032 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2034 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2035 struct file_ra_state
*ra
, struct file
*file
,
2036 pgoff_t offset
, pgoff_t last_index
);
2037 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
2039 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
2040 int btrfs_readpage(struct file
*file
, struct page
*page
);
2041 void btrfs_delete_inode(struct inode
*inode
);
2042 void btrfs_put_inode(struct inode
*inode
);
2043 void btrfs_read_locked_inode(struct inode
*inode
);
2044 int btrfs_write_inode(struct inode
*inode
, int wait
);
2045 void btrfs_dirty_inode(struct inode
*inode
);
2046 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2047 void btrfs_destroy_inode(struct inode
*inode
);
2048 int btrfs_init_cachep(void);
2049 void btrfs_destroy_cachep(void);
2050 long btrfs_ioctl_trans_end(struct file
*file
);
2051 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
2052 struct btrfs_root
*root
, int wait
);
2053 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
2054 struct btrfs_root
*root
);
2055 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2056 struct btrfs_root
*root
, int *is_new
);
2057 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2058 unsigned from
, unsigned to
);
2059 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2060 size_t page_offset
, u64 start
, u64 end
,
2062 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2063 struct btrfs_root
*root
,
2064 struct inode
*inode
);
2065 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2066 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2067 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2068 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2071 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2074 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
2075 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2077 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2078 extern struct file_operations btrfs_file_operations
;
2079 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
2080 struct btrfs_root
*root
, struct inode
*inode
,
2081 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
2082 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2083 struct btrfs_root
*root
,
2084 struct inode
*inode
, u64 start
, u64 end
);
2085 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2088 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2089 struct btrfs_root
*root
, int cache_only
);
2092 int btrfs_init_sysfs(void);
2093 void btrfs_exit_sysfs(void);
2094 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2095 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2096 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2097 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2100 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2103 u64
btrfs_parse_size(char *str
);
2104 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2105 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2108 int btrfs_check_acl(struct inode
*inode
, int mask
);
2109 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
2110 int btrfs_acl_chmod(struct inode
*inode
);
2112 /* free-space-cache.c */
2113 int btrfs_add_free_space(struct btrfs_block_group_cache
*block_group
,
2114 u64 bytenr
, u64 size
);
2115 int btrfs_add_free_space_lock(struct btrfs_block_group_cache
*block_group
,
2116 u64 offset
, u64 bytes
);
2117 int btrfs_remove_free_space(struct btrfs_block_group_cache
*block_group
,
2118 u64 bytenr
, u64 size
);
2119 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache
*block_group
,
2120 u64 offset
, u64 bytes
);
2121 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2123 struct btrfs_free_space
*btrfs_find_free_space(struct btrfs_block_group_cache
2124 *block_group
, u64 offset
,
2126 void btrfs_dump_free_space(struct btrfs_block_group_cache
*block_group
,
2128 u64
btrfs_block_group_free_space(struct btrfs_block_group_cache
*block_group
);