2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
22 #include <linux/version.h>
24 #include <linux/highmem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <asm/kmap_types.h>
30 #include "extent_io.h"
31 #include "extent_map.h"
32 #include "async-thread.h"
34 struct btrfs_trans_handle
;
35 struct btrfs_transaction
;
36 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
37 extern struct kmem_cache
*btrfs_transaction_cachep
;
38 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
39 extern struct kmem_cache
*btrfs_path_cachep
;
40 struct btrfs_ordered_sum
;
42 #define BTRFS_MAGIC "_BHRfS_M"
44 #define BTRFS_ACL_NOT_CACHED ((void *)-1)
46 #define BTRFS_MAX_LEVEL 8
48 /* holds pointers to all of the tree roots */
49 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
51 /* stores information about which extents are in use, and reference counts */
52 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
55 * chunk tree stores translations from logical -> physical block numbering
56 * the super block points to the chunk tree
58 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
61 * stores information about which areas of a given device are in use.
62 * one per device. The tree of tree roots points to the device tree
64 #define BTRFS_DEV_TREE_OBJECTID 4ULL
66 /* one per subvolume, storing files and directories */
67 #define BTRFS_FS_TREE_OBJECTID 5ULL
69 /* directory objectid inside the root tree */
70 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
72 /* holds checksums of all the data extents */
73 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
75 /* orhpan objectid for tracking unlinked/truncated files */
76 #define BTRFS_ORPHAN_OBJECTID -5ULL
78 /* does write ahead logging to speed up fsyncs */
79 #define BTRFS_TREE_LOG_OBJECTID -6ULL
80 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
82 /* for space balancing */
83 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
84 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
87 * extent checksums all have this objectid
88 * this allows them to share the logging tree
91 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
93 /* dummy objectid represents multiple objectids */
94 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
97 * All files have objectids in this range.
99 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
100 #define BTRFS_LAST_FREE_OBJECTID -256ULL
101 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
105 * the device items go into the chunk tree. The key is in the form
106 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
108 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
111 * we can actually store much bigger names, but lets not confuse the rest
114 #define BTRFS_NAME_LEN 255
116 /* 32 bytes in various csum fields */
117 #define BTRFS_CSUM_SIZE 32
120 #define BTRFS_CSUM_TYPE_CRC32 0
122 static int btrfs_csum_sizes
[] = { 4, 0 };
124 /* four bytes for CRC32 */
125 #define BTRFS_EMPTY_DIR_SIZE 0
127 #define BTRFS_FT_UNKNOWN 0
128 #define BTRFS_FT_REG_FILE 1
129 #define BTRFS_FT_DIR 2
130 #define BTRFS_FT_CHRDEV 3
131 #define BTRFS_FT_BLKDEV 4
132 #define BTRFS_FT_FIFO 5
133 #define BTRFS_FT_SOCK 6
134 #define BTRFS_FT_SYMLINK 7
135 #define BTRFS_FT_XATTR 8
136 #define BTRFS_FT_MAX 9
139 * the key defines the order in the tree, and so it also defines (optimal)
140 * block layout. objectid corresonds to the inode number. The flags
141 * tells us things about the object, and is a kind of stream selector.
142 * so for a given inode, keys with flags of 1 might refer to the inode
143 * data, flags of 2 may point to file data in the btree and flags == 3
144 * may point to extents.
146 * offset is the starting byte offset for this key in the stream.
148 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
149 * in cpu native order. Otherwise they are identical and their sizes
150 * should be the same (ie both packed)
152 struct btrfs_disk_key
{
156 } __attribute__ ((__packed__
));
162 } __attribute__ ((__packed__
));
164 struct btrfs_mapping_tree
{
165 struct extent_map_tree map_tree
;
168 #define BTRFS_UUID_SIZE 16
169 struct btrfs_dev_item
{
170 /* the internal btrfs device id */
173 /* size of the device */
179 /* optimal io alignment for this device */
182 /* optimal io width for this device */
185 /* minimal io size for this device */
188 /* type and info about this device */
191 /* expected generation for this device */
195 * starting byte of this partition on the device,
196 * to allowr for stripe alignment in the future
200 /* grouping information for allocation decisions */
203 /* seek speed 0-100 where 100 is fastest */
206 /* bandwidth 0-100 where 100 is fastest */
209 /* btrfs generated uuid for this device */
210 u8 uuid
[BTRFS_UUID_SIZE
];
212 /* uuid of FS who owns this device */
213 u8 fsid
[BTRFS_UUID_SIZE
];
214 } __attribute__ ((__packed__
));
216 struct btrfs_stripe
{
219 u8 dev_uuid
[BTRFS_UUID_SIZE
];
220 } __attribute__ ((__packed__
));
223 /* size of this chunk in bytes */
226 /* objectid of the root referencing this chunk */
232 /* optimal io alignment for this chunk */
235 /* optimal io width for this chunk */
238 /* minimal io size for this chunk */
241 /* 2^16 stripes is quite a lot, a second limit is the size of a single
246 /* sub stripes only matter for raid10 */
248 struct btrfs_stripe stripe
;
249 /* additional stripes go here */
250 } __attribute__ ((__packed__
));
252 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
254 BUG_ON(num_stripes
== 0);
255 return sizeof(struct btrfs_chunk
) +
256 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
259 #define BTRFS_FSID_SIZE 16
260 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
263 * every tree block (leaf or node) starts with this header.
265 struct btrfs_header
{
266 /* these first four must match the super block */
267 u8 csum
[BTRFS_CSUM_SIZE
];
268 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
269 __le64 bytenr
; /* which block this node is supposed to live in */
272 /* allowed to be different from the super from here on down */
273 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
278 } __attribute__ ((__packed__
));
280 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
281 sizeof(struct btrfs_header)) / \
282 sizeof(struct btrfs_key_ptr))
283 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
284 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
285 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
286 sizeof(struct btrfs_item) - \
287 sizeof(struct btrfs_file_extent_item))
289 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
292 * this is a very generous portion of the super block, giving us
293 * room to translate 14 chunks with 3 stripes each.
295 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
296 #define BTRFS_LABEL_SIZE 256
299 * the super block basically lists the main trees of the FS
300 * it currently lacks any block count etc etc
302 struct btrfs_super_block
{
303 u8 csum
[BTRFS_CSUM_SIZE
];
304 /* the first 4 fields must match struct btrfs_header */
305 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
306 __le64 bytenr
; /* this block number */
309 /* allowed to be different from the btrfs_header from here own down */
316 /* this will help find the new super based on the log root */
317 __le64 log_root_transid
;
320 __le64 root_dir_objectid
;
326 __le32 sys_chunk_array_size
;
327 __le64 chunk_root_generation
;
329 __le64 compat_ro_flags
;
330 __le64 incompat_flags
;
335 struct btrfs_dev_item dev_item
;
337 char label
[BTRFS_LABEL_SIZE
];
339 /* future expansion */
341 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
342 } __attribute__ ((__packed__
));
345 * Compat flags that we support. If any incompat flags are set other than the
346 * ones specified below then we will fail to mount
348 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
349 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
350 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
353 * A leaf is full of items. offset and size tell us where to find
354 * the item in the leaf (relative to the start of the data area)
357 struct btrfs_disk_key key
;
360 } __attribute__ ((__packed__
));
363 * leaves have an item area and a data area:
364 * [item0, item1....itemN] [free space] [dataN...data1, data0]
366 * The data is separate from the items to get the keys closer together
370 struct btrfs_header header
;
371 struct btrfs_item items
[];
372 } __attribute__ ((__packed__
));
375 * all non-leaf blocks are nodes, they hold only keys and pointers to
378 struct btrfs_key_ptr
{
379 struct btrfs_disk_key key
;
382 } __attribute__ ((__packed__
));
385 struct btrfs_header header
;
386 struct btrfs_key_ptr ptrs
[];
387 } __attribute__ ((__packed__
));
390 * btrfs_paths remember the path taken from the root down to the leaf.
391 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
392 * to any other levels that are present.
394 * The slots array records the index of the item or block pointer
395 * used while walking the tree.
398 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
399 int slots
[BTRFS_MAX_LEVEL
];
400 /* if there is real range locking, this locks field will change */
401 int locks
[BTRFS_MAX_LEVEL
];
403 /* keep some upper locks as we walk down */
409 * set by btrfs_split_item, tells search_slot to keep all locks
410 * and to force calls to keep space in the nodes
412 int search_for_split
;
416 * items in the extent btree are used to record the objectid of the
417 * owner of the block and the number of references
419 struct btrfs_extent_item
{
421 } __attribute__ ((__packed__
));
423 struct btrfs_extent_ref
{
428 } __attribute__ ((__packed__
));
430 /* dev extents record free space on individual devices. The owner
431 * field points back to the chunk allocation mapping tree that allocated
432 * the extent. The chunk tree uuid field is a way to double check the owner
434 struct btrfs_dev_extent
{
436 __le64 chunk_objectid
;
439 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
440 } __attribute__ ((__packed__
));
442 struct btrfs_inode_ref
{
446 } __attribute__ ((__packed__
));
448 struct btrfs_timespec
{
451 } __attribute__ ((__packed__
));
453 enum btrfs_compression_type
{
454 BTRFS_COMPRESS_NONE
= 0,
455 BTRFS_COMPRESS_ZLIB
= 1,
456 BTRFS_COMPRESS_LAST
= 2,
459 struct btrfs_inode_item
{
460 /* nfs style generation number */
462 /* transid that last touched this inode */
474 /* modification sequence number for NFS */
478 * a little future expansion, for more than this we can
479 * just grow the inode item and version it
482 struct btrfs_timespec atime
;
483 struct btrfs_timespec ctime
;
484 struct btrfs_timespec mtime
;
485 struct btrfs_timespec otime
;
486 } __attribute__ ((__packed__
));
488 struct btrfs_dir_log_item
{
490 } __attribute__ ((__packed__
));
492 struct btrfs_dir_item
{
493 struct btrfs_disk_key location
;
498 } __attribute__ ((__packed__
));
500 struct btrfs_root_item
{
501 struct btrfs_inode_item inode
;
507 __le64 last_snapshot
;
510 struct btrfs_disk_key drop_progress
;
513 } __attribute__ ((__packed__
));
516 * this is used for both forward and backward root refs
518 struct btrfs_root_ref
{
522 } __attribute__ ((__packed__
));
524 #define BTRFS_FILE_EXTENT_INLINE 0
525 #define BTRFS_FILE_EXTENT_REG 1
526 #define BTRFS_FILE_EXTENT_PREALLOC 2
528 struct btrfs_file_extent_item
{
530 * transaction id that created this extent
534 * max number of bytes to hold this extent in ram
535 * when we split a compressed extent we can't know how big
536 * each of the resulting pieces will be. So, this is
537 * an upper limit on the size of the extent in ram instead of
543 * 32 bits for the various ways we might encode the data,
544 * including compression and encryption. If any of these
545 * are set to something a given disk format doesn't understand
546 * it is treated like an incompat flag for reading and writing,
551 __le16 other_encoding
; /* spare for later use */
553 /* are we inline data or a real extent? */
557 * disk space consumed by the extent, checksum blocks are included
561 __le64 disk_num_bytes
;
563 * the logical offset in file blocks (no csums)
564 * this extent record is for. This allows a file extent to point
565 * into the middle of an existing extent on disk, sharing it
566 * between two snapshots (useful if some bytes in the middle of the
567 * extent have changed
571 * the logical number of file blocks (no csums included). This
572 * always reflects the size uncompressed and without encoding.
576 } __attribute__ ((__packed__
));
578 struct btrfs_csum_item
{
580 } __attribute__ ((__packed__
));
582 /* different types of block groups (and chunks) */
583 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
584 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
585 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
586 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
587 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
588 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
589 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
591 struct btrfs_block_group_item
{
593 __le64 chunk_objectid
;
595 } __attribute__ ((__packed__
));
597 struct btrfs_space_info
{
606 struct list_head list
;
608 /* for block groups in our same type */
609 struct list_head block_groups
;
611 struct rw_semaphore groups_sem
;
614 struct btrfs_free_space
{
615 struct rb_node bytes_index
;
616 struct rb_node offset_index
;
621 struct btrfs_block_group_cache
{
622 struct btrfs_key key
;
623 struct btrfs_block_group_item item
;
625 struct mutex alloc_mutex
;
626 struct mutex cache_mutex
;
634 struct btrfs_space_info
*space_info
;
636 /* free space cache stuff */
637 struct rb_root free_space_bytes
;
638 struct rb_root free_space_offset
;
640 /* block group cache stuff */
641 struct rb_node cache_node
;
643 /* for block groups in the same raid type */
644 struct list_head list
;
650 struct btrfs_leaf_ref_tree
{
652 struct list_head list
;
657 struct btrfs_fs_devices
;
658 struct btrfs_fs_info
{
659 u8 fsid
[BTRFS_FSID_SIZE
];
660 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
661 struct btrfs_root
*extent_root
;
662 struct btrfs_root
*tree_root
;
663 struct btrfs_root
*chunk_root
;
664 struct btrfs_root
*dev_root
;
665 struct btrfs_root
*fs_root
;
666 struct btrfs_root
*csum_root
;
668 /* the log root tree is a directory of all the other log roots */
669 struct btrfs_root
*log_root_tree
;
670 struct radix_tree_root fs_roots_radix
;
672 /* block group cache stuff */
673 spinlock_t block_group_cache_lock
;
674 struct rb_root block_group_cache_tree
;
676 struct extent_io_tree pinned_extents
;
677 struct extent_io_tree pending_del
;
678 struct extent_io_tree extent_ins
;
680 /* logical->physical extent mapping */
681 struct btrfs_mapping_tree mapping_tree
;
684 u64 last_trans_committed
;
685 u64 last_trans_new_blockgroup
;
686 u64 open_ioctl_trans
;
687 unsigned long mount_opt
;
691 struct btrfs_transaction
*running_transaction
;
692 wait_queue_head_t transaction_throttle
;
693 wait_queue_head_t transaction_wait
;
694 wait_queue_head_t async_submit_wait
;
696 struct btrfs_super_block super_copy
;
697 struct btrfs_super_block super_for_commit
;
698 struct block_device
*__bdev
;
699 struct super_block
*sb
;
700 struct inode
*btree_inode
;
701 struct backing_dev_info bdi
;
702 struct mutex trans_mutex
;
703 struct mutex tree_log_mutex
;
704 struct mutex transaction_kthread_mutex
;
705 struct mutex cleaner_mutex
;
706 struct mutex extent_ins_mutex
;
707 struct mutex pinned_mutex
;
708 struct mutex chunk_mutex
;
709 struct mutex drop_mutex
;
710 struct mutex volume_mutex
;
711 struct mutex tree_reloc_mutex
;
712 struct list_head trans_list
;
713 struct list_head hashers
;
714 struct list_head dead_roots
;
716 atomic_t nr_async_submits
;
717 atomic_t async_submit_draining
;
718 atomic_t nr_async_bios
;
719 atomic_t async_delalloc_pages
;
722 * this is used by the balancing code to wait for all the pending
725 spinlock_t ordered_extent_lock
;
726 struct list_head ordered_extents
;
727 struct list_head delalloc_inodes
;
730 * there is a pool of worker threads for checksumming during writes
731 * and a pool for checksumming after reads. This is because readers
732 * can run with FS locks held, and the writers may be waiting for
733 * those locks. We don't want ordering in the pending list to cause
734 * deadlocks, and so the two are serviced separately.
736 * A third pool does submit_bio to avoid deadlocking with the other
739 struct btrfs_workers workers
;
740 struct btrfs_workers delalloc_workers
;
741 struct btrfs_workers endio_workers
;
742 struct btrfs_workers endio_meta_workers
;
743 struct btrfs_workers endio_meta_write_workers
;
744 struct btrfs_workers endio_write_workers
;
745 struct btrfs_workers submit_workers
;
747 * fixup workers take dirty pages that didn't properly go through
748 * the cow mechanism and make them safe to write. It happens
749 * for the sys_munmap function call path
751 struct btrfs_workers fixup_workers
;
752 struct task_struct
*transaction_kthread
;
753 struct task_struct
*cleaner_kthread
;
754 int thread_pool_size
;
756 /* tree relocation relocated fields */
757 struct list_head dead_reloc_roots
;
758 struct btrfs_leaf_ref_tree reloc_ref_tree
;
759 struct btrfs_leaf_ref_tree shared_ref_tree
;
761 struct kobject super_kobj
;
762 struct completion kobj_unregister
;
765 int log_root_recovering
;
767 atomic_t throttle_gen
;
770 struct list_head dirty_cowonly_roots
;
772 struct btrfs_fs_devices
*fs_devices
;
773 struct list_head space_info
;
774 spinlock_t delalloc_lock
;
775 spinlock_t new_trans_lock
;
780 spinlock_t ref_cache_lock
;
781 u64 total_ref_cache_size
;
783 u64 avail_data_alloc_bits
;
784 u64 avail_metadata_alloc_bits
;
785 u64 avail_system_alloc_bits
;
786 u64 data_alloc_profile
;
787 u64 metadata_alloc_profile
;
788 u64 system_alloc_profile
;
794 * in ram representation of the tree. extent_root is used for all allocations
795 * and for the extent tree extent_root root.
797 struct btrfs_dirty_root
;
799 struct extent_buffer
*node
;
801 /* the node lock is held while changing the node pointer */
802 spinlock_t node_lock
;
804 struct extent_buffer
*commit_root
;
805 struct btrfs_leaf_ref_tree
*ref_tree
;
806 struct btrfs_leaf_ref_tree ref_tree_struct
;
807 struct btrfs_dirty_root
*dirty_root
;
808 struct btrfs_root
*log_root
;
809 struct btrfs_root
*reloc_root
;
811 struct btrfs_root_item root_item
;
812 struct btrfs_key root_key
;
813 struct btrfs_fs_info
*fs_info
;
814 struct extent_io_tree dirty_log_pages
;
816 struct kobject root_kobj
;
817 struct completion kobj_unregister
;
818 struct mutex objectid_mutex
;
820 struct mutex log_mutex
;
821 wait_queue_head_t log_writer_wait
;
822 wait_queue_head_t log_commit_wait
[2];
823 atomic_t log_writers
;
824 atomic_t log_commit
[2];
825 unsigned long log_transid
;
826 unsigned long log_batch
;
831 /* data allocations are done in sectorsize units */
834 /* node allocations are done in nodesize units */
837 /* leaf allocations are done in leafsize units */
844 u64 last_inode_alloc
;
847 u64 defrag_trans_start
;
848 struct btrfs_key defrag_progress
;
849 struct btrfs_key defrag_max
;
855 /* the dirty list is only used by non-reference counted roots */
856 struct list_head dirty_list
;
858 spinlock_t list_lock
;
859 struct list_head dead_list
;
860 struct list_head orphan_list
;
863 * right now this just gets used so that a root has its own devid
864 * for stat. It may be used for more later
866 struct super_block anon_super
;
871 * inode items have the data typically returned from stat and store other
872 * info about object characteristics. There is one for every file and dir in
875 #define BTRFS_INODE_ITEM_KEY 1
876 #define BTRFS_INODE_REF_KEY 12
877 #define BTRFS_XATTR_ITEM_KEY 24
878 #define BTRFS_ORPHAN_ITEM_KEY 48
879 /* reserve 2-15 close to the inode for later flexibility */
882 * dir items are the name -> inode pointers in a directory. There is one
883 * for every name in a directory.
885 #define BTRFS_DIR_LOG_ITEM_KEY 60
886 #define BTRFS_DIR_LOG_INDEX_KEY 72
887 #define BTRFS_DIR_ITEM_KEY 84
888 #define BTRFS_DIR_INDEX_KEY 96
890 * extent data is for file data
892 #define BTRFS_EXTENT_DATA_KEY 108
895 * extent csums are stored in a separate tree and hold csums for
896 * an entire extent on disk.
898 #define BTRFS_EXTENT_CSUM_KEY 128
901 * root items point to tree roots. There are typically in the root
902 * tree used by the super block to find all the other trees
904 #define BTRFS_ROOT_ITEM_KEY 132
907 * root backrefs tie subvols and snapshots to the directory entries that
910 #define BTRFS_ROOT_BACKREF_KEY 144
913 * root refs make a fast index for listing all of the snapshots and
914 * subvolumes referenced by a given root. They point directly to the
915 * directory item in the root that references the subvol
917 #define BTRFS_ROOT_REF_KEY 156
920 * extent items are in the extent map tree. These record which blocks
921 * are used, and how many references there are to each block
923 #define BTRFS_EXTENT_ITEM_KEY 168
924 #define BTRFS_EXTENT_REF_KEY 180
927 * block groups give us hints into the extent allocation trees. Which
928 * blocks are free etc etc
930 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
932 #define BTRFS_DEV_EXTENT_KEY 204
933 #define BTRFS_DEV_ITEM_KEY 216
934 #define BTRFS_CHUNK_ITEM_KEY 228
937 * string items are for debugging. They just store a short string of
940 #define BTRFS_STRING_ITEM_KEY 253
942 #define BTRFS_MOUNT_NODATASUM (1 << 0)
943 #define BTRFS_MOUNT_NODATACOW (1 << 1)
944 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
945 #define BTRFS_MOUNT_SSD (1 << 3)
946 #define BTRFS_MOUNT_DEGRADED (1 << 4)
947 #define BTRFS_MOUNT_COMPRESS (1 << 5)
949 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
950 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
951 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
956 #define BTRFS_INODE_NODATASUM (1 << 0)
957 #define BTRFS_INODE_NODATACOW (1 << 1)
958 #define BTRFS_INODE_READONLY (1 << 2)
959 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
960 #define BTRFS_INODE_PREALLOC (1 << 4)
961 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
963 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
965 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
967 /* some macros to generate set/get funcs for the struct fields. This
968 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
971 #define le8_to_cpu(v) (v)
972 #define cpu_to_le8(v) (v)
975 #define read_eb_member(eb, ptr, type, member, result) ( \
976 read_extent_buffer(eb, (char *)(result), \
977 ((unsigned long)(ptr)) + \
978 offsetof(type, member), \
979 sizeof(((type *)0)->member)))
981 #define write_eb_member(eb, ptr, type, member, result) ( \
982 write_extent_buffer(eb, (char *)(result), \
983 ((unsigned long)(ptr)) + \
984 offsetof(type, member), \
985 sizeof(((type *)0)->member)))
987 #ifndef BTRFS_SETGET_FUNCS
988 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
989 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
990 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
993 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
994 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
996 type *p = kmap_atomic(eb->first_page, KM_USER0); \
997 u##bits res = le##bits##_to_cpu(p->member); \
998 kunmap_atomic(p, KM_USER0); \
1001 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1004 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1005 p->member = cpu_to_le##bits(val); \
1006 kunmap_atomic(p, KM_USER0); \
1009 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1010 static inline u##bits btrfs_##name(type *s) \
1012 return le##bits##_to_cpu(s->member); \
1014 static inline void btrfs_set_##name(type *s, u##bits val) \
1016 s->member = cpu_to_le##bits(val); \
1019 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1020 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1021 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1022 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1023 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1024 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1026 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1027 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1028 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1029 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1030 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1031 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1033 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1034 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1036 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1038 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1040 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1042 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1044 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1045 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1047 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1049 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1051 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1054 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1056 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1059 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1061 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1064 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1065 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1066 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1067 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1068 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1069 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1070 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1071 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1072 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1073 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1074 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1076 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1078 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1081 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1082 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1083 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1085 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1087 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1089 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1091 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1092 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1094 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1096 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1097 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1099 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1102 unsigned long offset
= (unsigned long)c
;
1103 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1104 offset
+= nr
* sizeof(struct btrfs_stripe
);
1105 return (struct btrfs_stripe
*)offset
;
1108 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1110 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1113 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1114 struct btrfs_chunk
*c
, int nr
)
1116 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1119 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1120 struct btrfs_chunk
*c
, int nr
,
1123 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1126 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1127 struct btrfs_chunk
*c
, int nr
)
1129 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1132 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1133 struct btrfs_chunk
*c
, int nr
,
1136 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1139 /* struct btrfs_block_group_item */
1140 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1142 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1144 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1145 struct btrfs_block_group_item
, chunk_objectid
, 64);
1147 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1148 struct btrfs_block_group_item
, chunk_objectid
, 64);
1149 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1150 struct btrfs_block_group_item
, flags
, 64);
1151 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1152 struct btrfs_block_group_item
, flags
, 64);
1154 /* struct btrfs_inode_ref */
1155 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1156 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1158 /* struct btrfs_inode_item */
1159 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1160 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1161 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1162 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1163 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1164 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1165 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1166 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1167 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1168 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1169 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1170 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1172 static inline struct btrfs_timespec
*
1173 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1175 unsigned long ptr
= (unsigned long)inode_item
;
1176 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1177 return (struct btrfs_timespec
*)ptr
;
1180 static inline struct btrfs_timespec
*
1181 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1183 unsigned long ptr
= (unsigned long)inode_item
;
1184 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1185 return (struct btrfs_timespec
*)ptr
;
1188 static inline struct btrfs_timespec
*
1189 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1191 unsigned long ptr
= (unsigned long)inode_item
;
1192 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1193 return (struct btrfs_timespec
*)ptr
;
1196 static inline struct btrfs_timespec
*
1197 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1199 unsigned long ptr
= (unsigned long)inode_item
;
1200 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1201 return (struct btrfs_timespec
*)ptr
;
1204 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1205 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1207 /* struct btrfs_dev_extent */
1208 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1210 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1211 chunk_objectid
, 64);
1212 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1214 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1216 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1218 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1219 return (u8
*)((unsigned long)dev
+ ptr
);
1222 /* struct btrfs_extent_ref */
1223 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1224 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1225 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1226 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1228 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1229 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1231 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1233 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1236 /* struct btrfs_extent_item */
1237 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1238 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1241 /* struct btrfs_node */
1242 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1243 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1245 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1248 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1249 sizeof(struct btrfs_key_ptr
) * nr
;
1250 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1253 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1257 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1258 sizeof(struct btrfs_key_ptr
) * nr
;
1259 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1262 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1265 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1266 sizeof(struct btrfs_key_ptr
) * nr
;
1267 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1270 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1274 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1275 sizeof(struct btrfs_key_ptr
) * nr
;
1276 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1279 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1281 return offsetof(struct btrfs_node
, ptrs
) +
1282 sizeof(struct btrfs_key_ptr
) * nr
;
1285 void btrfs_node_key(struct extent_buffer
*eb
,
1286 struct btrfs_disk_key
*disk_key
, int nr
);
1288 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1289 struct btrfs_disk_key
*disk_key
, int nr
)
1292 ptr
= btrfs_node_key_ptr_offset(nr
);
1293 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1294 struct btrfs_key_ptr
, key
, disk_key
);
1297 /* struct btrfs_item */
1298 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1299 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1301 static inline unsigned long btrfs_item_nr_offset(int nr
)
1303 return offsetof(struct btrfs_leaf
, items
) +
1304 sizeof(struct btrfs_item
) * nr
;
1307 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1310 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1313 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1314 struct btrfs_item
*item
)
1316 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1319 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1321 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1324 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1326 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1329 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1331 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1334 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1335 struct btrfs_disk_key
*disk_key
, int nr
)
1337 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1338 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1341 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1342 struct btrfs_disk_key
*disk_key
, int nr
)
1344 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1345 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1348 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1351 * struct btrfs_root_ref
1353 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1354 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1355 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1357 /* struct btrfs_dir_item */
1358 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1359 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1360 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1361 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1363 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1364 struct btrfs_dir_item
*item
,
1365 struct btrfs_disk_key
*key
)
1367 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1370 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1371 struct btrfs_dir_item
*item
,
1372 struct btrfs_disk_key
*key
)
1374 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1377 /* struct btrfs_disk_key */
1378 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1380 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1381 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1383 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1384 struct btrfs_disk_key
*disk
)
1386 cpu
->offset
= le64_to_cpu(disk
->offset
);
1387 cpu
->type
= disk
->type
;
1388 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1391 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1392 struct btrfs_key
*cpu
)
1394 disk
->offset
= cpu_to_le64(cpu
->offset
);
1395 disk
->type
= cpu
->type
;
1396 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1399 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1400 struct btrfs_key
*key
, int nr
)
1402 struct btrfs_disk_key disk_key
;
1403 btrfs_node_key(eb
, &disk_key
, nr
);
1404 btrfs_disk_key_to_cpu(key
, &disk_key
);
1407 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1408 struct btrfs_key
*key
, int nr
)
1410 struct btrfs_disk_key disk_key
;
1411 btrfs_item_key(eb
, &disk_key
, nr
);
1412 btrfs_disk_key_to_cpu(key
, &disk_key
);
1415 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1416 struct btrfs_dir_item
*item
,
1417 struct btrfs_key
*key
)
1419 struct btrfs_disk_key disk_key
;
1420 btrfs_dir_item_key(eb
, item
, &disk_key
);
1421 btrfs_disk_key_to_cpu(key
, &disk_key
);
1425 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1430 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1435 /* struct btrfs_header */
1436 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1437 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1439 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1440 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1441 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1442 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1444 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1446 return (btrfs_header_flags(eb
) & flag
) == flag
;
1449 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1451 u64 flags
= btrfs_header_flags(eb
);
1452 btrfs_set_header_flags(eb
, flags
| flag
);
1453 return (flags
& flag
) == flag
;
1456 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1458 u64 flags
= btrfs_header_flags(eb
);
1459 btrfs_set_header_flags(eb
, flags
& ~flag
);
1460 return (flags
& flag
) == flag
;
1463 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1465 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1469 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1471 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1475 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1477 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1481 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1483 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1487 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1492 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1497 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1502 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1504 return btrfs_header_level(eb
) == 0;
1507 /* struct btrfs_root_item */
1508 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1510 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1511 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1512 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1514 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1516 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1517 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1518 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1519 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1520 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1521 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1522 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1523 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1526 /* struct btrfs_super_block */
1528 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1529 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1530 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1532 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1533 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1534 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1535 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1536 struct btrfs_super_block
, chunk_root_generation
, 64);
1537 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1539 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1541 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1542 chunk_root_level
, 8);
1543 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1545 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1546 log_root_transid
, 64);
1547 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1549 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1551 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1553 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1555 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1557 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1559 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1561 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1562 root_dir_objectid
, 64);
1563 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1565 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1567 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1569 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1570 incompat_flags
, 64);
1571 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1574 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1576 int t
= btrfs_super_csum_type(s
);
1577 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1578 return btrfs_csum_sizes
[t
];
1581 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1583 return offsetof(struct btrfs_leaf
, items
);
1586 /* struct btrfs_file_extent_item */
1587 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1589 static inline unsigned long
1590 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1592 unsigned long offset
= (unsigned long)e
;
1593 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1597 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1599 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1602 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1604 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1606 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1607 disk_num_bytes
, 64);
1608 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1610 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1612 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1614 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1616 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1618 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1619 other_encoding
, 16);
1621 /* this returns the number of file bytes represented by the inline item.
1622 * If an item is compressed, this is the uncompressed size
1624 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1625 struct btrfs_file_extent_item
*e
)
1627 return btrfs_file_extent_ram_bytes(eb
, e
);
1631 * this returns the number of bytes used by the item on disk, minus the
1632 * size of any extent headers. If a file is compressed on disk, this is
1633 * the compressed size
1635 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1636 struct btrfs_item
*e
)
1638 unsigned long offset
;
1639 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1640 return btrfs_item_size(eb
, e
) - offset
;
1643 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1645 return sb
->s_fs_info
;
1648 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1649 const char *name
, int len
)
1651 /* if we already have a name just free it */
1654 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1658 memcpy(root
->name
, name
, len
);
1659 root
->name
[len
] = '\0';
1664 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
1667 return root
->leafsize
;
1668 return root
->nodesize
;
1671 /* helper function to cast into the data area of the leaf. */
1672 #define btrfs_item_ptr(leaf, slot, type) \
1673 ((type *)(btrfs_leaf_data(leaf) + \
1674 btrfs_item_offset_nr(leaf, slot)))
1676 #define btrfs_item_ptr_offset(leaf, slot) \
1677 ((unsigned long)(btrfs_leaf_data(leaf) + \
1678 btrfs_item_offset_nr(leaf, slot)))
1680 static inline struct dentry
*fdentry(struct file
*file
)
1682 return file
->f_path
.dentry
;
1686 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1687 int btrfs_lookup_extent_ref(struct btrfs_trans_handle
*trans
,
1688 struct btrfs_root
*root
, u64 bytenr
,
1689 u64 num_bytes
, u32
*refs
);
1690 int btrfs_update_pinned_extents(struct btrfs_root
*root
,
1691 u64 bytenr
, u64 num
, int pin
);
1692 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1693 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1694 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
1695 struct btrfs_root
*root
, u64 objectid
, u64 bytenr
);
1696 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1697 struct btrfs_root
*root
);
1698 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1699 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
1700 struct btrfs_fs_info
*info
,
1702 u64
btrfs_find_block_group(struct btrfs_root
*root
,
1703 u64 search_start
, u64 search_hint
, int owner
);
1704 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1705 struct btrfs_root
*root
,
1706 u32 blocksize
, u64 parent
,
1712 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1713 struct btrfs_root
*root
,
1714 u64 bytenr
, u32 blocksize
,
1716 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1717 struct btrfs_root
*root
,
1718 u64 num_bytes
, u64 parent
, u64 min_bytes
,
1719 u64 root_objectid
, u64 ref_generation
,
1720 u64 owner
, u64 empty_size
, u64 hint_byte
,
1721 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1722 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle
*trans
,
1723 struct btrfs_root
*root
, u64 parent
,
1724 u64 root_objectid
, u64 ref_generation
,
1725 u64 owner
, struct btrfs_key
*ins
);
1726 int btrfs_alloc_logged_extent(struct btrfs_trans_handle
*trans
,
1727 struct btrfs_root
*root
, u64 parent
,
1728 u64 root_objectid
, u64 ref_generation
,
1729 u64 owner
, struct btrfs_key
*ins
);
1730 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1731 struct btrfs_root
*root
,
1732 u64 num_bytes
, u64 min_alloc_size
,
1733 u64 empty_size
, u64 hint_byte
,
1734 u64 search_end
, struct btrfs_key
*ins
,
1736 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1737 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1739 int btrfs_cache_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1740 struct extent_buffer
*buf
, u32 nr_extents
);
1741 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1742 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1743 struct extent_buffer
*buf
, int start_slot
, int nr
);
1744 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1745 struct btrfs_root
*root
,
1746 u64 bytenr
, u64 num_bytes
, u64 parent
,
1747 u64 root_objectid
, u64 ref_generation
,
1748 u64 owner_objectid
, int pin
);
1749 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1750 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1751 struct btrfs_root
*root
,
1752 struct extent_io_tree
*unpin
);
1753 int btrfs_inc_extent_ref(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
);
1758 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1759 struct btrfs_root
*root
, u64 bytenr
,
1760 u64 orig_parent
, u64 parent
,
1761 u64 root_objectid
, u64 ref_generation
,
1762 u64 owner_objectid
);
1763 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1764 struct btrfs_root
*root
);
1765 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
1766 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1767 int btrfs_read_block_groups(struct btrfs_root
*root
);
1768 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1769 struct btrfs_root
*root
, u64 bytes_used
,
1770 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1772 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
1773 struct btrfs_root
*root
, u64 group_start
);
1774 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
1775 int btrfs_free_reloc_root(struct btrfs_trans_handle
*trans
,
1776 struct btrfs_root
*root
);
1777 int btrfs_drop_dead_reloc_roots(struct btrfs_root
*root
);
1778 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle
*trans
,
1779 struct btrfs_root
*root
,
1780 struct extent_buffer
*buf
, u64 orig_start
);
1781 int btrfs_add_dead_reloc_root(struct btrfs_root
*root
);
1782 int btrfs_cleanup_reloc_trees(struct btrfs_root
*root
);
1783 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
1784 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
1786 int btrfs_previous_item(struct btrfs_root
*root
,
1787 struct btrfs_path
*path
, u64 min_objectid
,
1789 int btrfs_merge_path(struct btrfs_trans_handle
*trans
,
1790 struct btrfs_root
*root
,
1791 struct btrfs_key
*node_keys
,
1792 u64
*nodes
, int lowest_level
);
1793 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1794 struct btrfs_root
*root
, struct btrfs_path
*path
,
1795 struct btrfs_key
*new_key
);
1796 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1797 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1798 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1799 struct btrfs_key
*key
, int lowest_level
,
1800 int cache_only
, u64 min_trans
);
1801 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1802 struct btrfs_key
*max_key
,
1803 struct btrfs_path
*path
, int cache_only
,
1805 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1806 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1807 struct extent_buffer
*parent
, int parent_slot
,
1808 struct extent_buffer
**cow_ret
, u64 prealloc_dest
);
1809 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1810 struct btrfs_root
*root
,
1811 struct extent_buffer
*buf
,
1812 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1813 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1814 *root
, struct btrfs_path
*path
, u32 data_size
);
1815 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1816 struct btrfs_root
*root
,
1817 struct btrfs_path
*path
,
1818 u32 new_size
, int from_end
);
1819 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
1820 struct btrfs_root
*root
,
1821 struct btrfs_path
*path
,
1822 struct btrfs_key
*new_key
,
1823 unsigned long split_offset
);
1824 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1825 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1827 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1828 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1829 int start_slot
, int cache_only
, u64
*last_ret
,
1830 struct btrfs_key
*progress
);
1831 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1832 struct btrfs_path
*btrfs_alloc_path(void);
1833 void btrfs_free_path(struct btrfs_path
*p
);
1834 void btrfs_set_path_blocking(struct btrfs_path
*p
);
1835 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
1837 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1838 struct btrfs_path
*path
, int slot
, int nr
);
1839 int btrfs_del_leaf(struct btrfs_trans_handle
*trans
,
1840 struct btrfs_root
*root
,
1841 struct btrfs_path
*path
, u64 bytenr
);
1842 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1843 struct btrfs_root
*root
,
1844 struct btrfs_path
*path
)
1846 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1849 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1850 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1851 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
1852 struct btrfs_root
*root
,
1853 struct btrfs_path
*path
,
1854 struct btrfs_key
*cpu_key
, u32
*data_size
,
1856 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1857 struct btrfs_root
*root
,
1858 struct btrfs_path
*path
,
1859 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1861 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1862 struct btrfs_root
*root
,
1863 struct btrfs_path
*path
,
1864 struct btrfs_key
*key
,
1867 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1870 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1871 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1872 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1873 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1875 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
1876 struct btrfs_root
*root
,
1877 struct extent_buffer
*node
,
1878 struct extent_buffer
*parent
);
1880 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
1881 struct btrfs_path
*path
,
1882 u64 root_id
, u64 ref_id
);
1883 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
1884 struct btrfs_root
*tree_root
,
1885 u64 root_id
, u8 type
, u64 ref_id
,
1886 u64 dirid
, u64 sequence
,
1887 const char *name
, int name_len
);
1888 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1889 struct btrfs_key
*key
);
1890 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1891 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1893 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1894 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1896 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1897 btrfs_root_item
*item
, struct btrfs_key
*key
);
1898 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
1899 u64
*found_objectid
);
1900 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1901 struct btrfs_root
*latest_root
);
1903 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
1904 struct btrfs_root
*root
, const char *name
,
1905 int name_len
, u64 dir
,
1906 struct btrfs_key
*location
, u8 type
, u64 index
);
1907 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1908 struct btrfs_root
*root
,
1909 struct btrfs_path
*path
, u64 dir
,
1910 const char *name
, int name_len
,
1912 struct btrfs_dir_item
*
1913 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1914 struct btrfs_root
*root
,
1915 struct btrfs_path
*path
, u64 dir
,
1916 u64 objectid
, const char *name
, int name_len
,
1918 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1919 struct btrfs_path
*path
,
1920 const char *name
, int name_len
);
1921 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1922 struct btrfs_root
*root
,
1923 struct btrfs_path
*path
,
1924 struct btrfs_dir_item
*di
);
1925 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1926 struct btrfs_root
*root
, const char *name
,
1927 u16 name_len
, const void *data
, u16 data_len
,
1929 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1930 struct btrfs_root
*root
,
1931 struct btrfs_path
*path
, u64 dir
,
1932 const char *name
, u16 name_len
,
1936 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
1937 struct btrfs_root
*root
, u64 offset
);
1938 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
1939 struct btrfs_root
*root
, u64 offset
);
1942 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1943 struct btrfs_root
*fs_root
,
1944 u64 dirid
, u64
*objectid
);
1945 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1948 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1949 struct btrfs_root
*root
,
1950 const char *name
, int name_len
,
1951 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1952 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1953 struct btrfs_root
*root
,
1954 const char *name
, int name_len
,
1955 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
1956 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1957 struct btrfs_root
*root
,
1958 struct btrfs_path
*path
, u64 objectid
);
1959 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1960 *root
, struct btrfs_path
*path
,
1961 struct btrfs_key
*location
, int mod
);
1964 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
1965 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
1966 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
1967 struct bio
*bio
, u32
*dst
);
1968 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1969 struct btrfs_root
*root
,
1970 u64 objectid
, u64 pos
,
1971 u64 disk_offset
, u64 disk_num_bytes
,
1972 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
1973 u8 compression
, u8 encryption
, u16 other_encoding
);
1974 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1975 struct btrfs_root
*root
,
1976 struct btrfs_path
*path
, u64 objectid
,
1977 u64 bytenr
, int mod
);
1978 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1979 struct btrfs_root
*root
,
1980 struct btrfs_ordered_sum
*sums
);
1981 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
1982 struct bio
*bio
, u64 file_start
, int contig
);
1983 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
1984 u64 start
, unsigned long len
);
1985 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1986 struct btrfs_root
*root
,
1987 struct btrfs_path
*path
,
1988 u64 bytenr
, int cow
);
1989 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1990 struct btrfs_root
*root
, struct btrfs_path
*path
,
1992 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
1993 u64 end
, struct list_head
*list
);
1996 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1997 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1998 #define ClearPageChecked ClearPageFsMisc
1999 #define SetPageChecked SetPageFsMisc
2000 #define PageChecked PageFsMisc
2003 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2004 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2005 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2006 struct btrfs_root
*root
,
2007 struct inode
*dir
, struct inode
*inode
,
2008 const char *name
, int name_len
);
2009 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2010 struct inode
*parent_inode
, struct inode
*inode
,
2011 const char *name
, int name_len
, int add_backref
, u64 index
);
2012 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2013 struct btrfs_root
*root
,
2014 struct inode
*inode
, u64 new_size
,
2017 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
);
2018 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
2019 int btrfs_writepages(struct address_space
*mapping
,
2020 struct writeback_control
*wbc
);
2021 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2022 struct btrfs_root
*new_root
, struct dentry
*dentry
,
2023 u64 new_dirid
, u64 alloc_hint
);
2024 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2025 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2027 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2028 struct file_ra_state
*ra
, struct file
*file
,
2029 pgoff_t offset
, pgoff_t last_index
);
2030 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
2032 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
2033 int btrfs_readpage(struct file
*file
, struct page
*page
);
2034 void btrfs_delete_inode(struct inode
*inode
);
2035 void btrfs_put_inode(struct inode
*inode
);
2036 void btrfs_read_locked_inode(struct inode
*inode
);
2037 int btrfs_write_inode(struct inode
*inode
, int wait
);
2038 void btrfs_dirty_inode(struct inode
*inode
);
2039 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2040 void btrfs_destroy_inode(struct inode
*inode
);
2041 int btrfs_init_cachep(void);
2042 void btrfs_destroy_cachep(void);
2043 long btrfs_ioctl_trans_end(struct file
*file
);
2044 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
2045 struct btrfs_root
*root
, int wait
);
2046 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
2047 struct btrfs_root
*root
);
2048 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2049 struct btrfs_root
*root
, int *is_new
);
2050 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2051 unsigned from
, unsigned to
);
2052 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2053 size_t page_offset
, u64 start
, u64 end
,
2055 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2056 struct btrfs_root
*root
,
2057 struct inode
*inode
);
2058 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2059 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2060 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2061 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2064 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2067 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
2068 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2070 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2071 extern struct file_operations btrfs_file_operations
;
2072 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
2073 struct btrfs_root
*root
, struct inode
*inode
,
2074 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
2075 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2076 struct btrfs_root
*root
,
2077 struct inode
*inode
, u64 start
, u64 end
);
2078 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2081 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2082 struct btrfs_root
*root
, int cache_only
);
2085 int btrfs_init_sysfs(void);
2086 void btrfs_exit_sysfs(void);
2087 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2088 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2089 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2090 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2093 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2096 u64
btrfs_parse_size(char *str
);
2097 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2098 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2101 int btrfs_check_acl(struct inode
*inode
, int mask
);
2102 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
2103 int btrfs_acl_chmod(struct inode
*inode
);
2105 /* free-space-cache.c */
2106 int btrfs_add_free_space(struct btrfs_block_group_cache
*block_group
,
2107 u64 bytenr
, u64 size
);
2108 int btrfs_add_free_space_lock(struct btrfs_block_group_cache
*block_group
,
2109 u64 offset
, u64 bytes
);
2110 int btrfs_remove_free_space(struct btrfs_block_group_cache
*block_group
,
2111 u64 bytenr
, u64 size
);
2112 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache
*block_group
,
2113 u64 offset
, u64 bytes
);
2114 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2116 struct btrfs_free_space
*btrfs_find_free_space(struct btrfs_block_group_cache
2117 *block_group
, u64 offset
,
2119 void btrfs_dump_free_space(struct btrfs_block_group_cache
*block_group
,
2121 u64
btrfs_block_group_free_space(struct btrfs_block_group_cache
*block_group
);