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_CRC32_SIZE 4
130 #define BTRFS_EMPTY_DIR_SIZE 0
132 #define BTRFS_FT_UNKNOWN 0
133 #define BTRFS_FT_REG_FILE 1
134 #define BTRFS_FT_DIR 2
135 #define BTRFS_FT_CHRDEV 3
136 #define BTRFS_FT_BLKDEV 4
137 #define BTRFS_FT_FIFO 5
138 #define BTRFS_FT_SOCK 6
139 #define BTRFS_FT_SYMLINK 7
140 #define BTRFS_FT_XATTR 8
141 #define BTRFS_FT_MAX 9
144 * the key defines the order in the tree, and so it also defines (optimal)
145 * block layout. objectid corresonds to the inode number. The flags
146 * tells us things about the object, and is a kind of stream selector.
147 * so for a given inode, keys with flags of 1 might refer to the inode
148 * data, flags of 2 may point to file data in the btree and flags == 3
149 * may point to extents.
151 * offset is the starting byte offset for this key in the stream.
153 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
154 * in cpu native order. Otherwise they are identical and their sizes
155 * should be the same (ie both packed)
157 struct btrfs_disk_key
{
161 } __attribute__ ((__packed__
));
167 } __attribute__ ((__packed__
));
169 struct btrfs_mapping_tree
{
170 struct extent_map_tree map_tree
;
173 #define BTRFS_UUID_SIZE 16
174 struct btrfs_dev_item
{
175 /* the internal btrfs device id */
178 /* size of the device */
184 /* optimal io alignment for this device */
187 /* optimal io width for this device */
190 /* minimal io size for this device */
193 /* type and info about this device */
196 /* expected generation for this device */
199 /* grouping information for allocation decisions */
202 /* seek speed 0-100 where 100 is fastest */
205 /* bandwidth 0-100 where 100 is fastest */
208 /* btrfs generated uuid for this device */
209 u8 uuid
[BTRFS_UUID_SIZE
];
211 /* uuid of FS who owns this device */
212 u8 fsid
[BTRFS_UUID_SIZE
];
213 } __attribute__ ((__packed__
));
215 struct btrfs_stripe
{
218 u8 dev_uuid
[BTRFS_UUID_SIZE
];
219 } __attribute__ ((__packed__
));
222 /* size of this chunk in bytes */
225 /* objectid of the root referencing this chunk */
231 /* optimal io alignment for this chunk */
234 /* optimal io width for this chunk */
237 /* minimal io size for this chunk */
240 /* 2^16 stripes is quite a lot, a second limit is the size of a single
245 /* sub stripes only matter for raid10 */
247 struct btrfs_stripe stripe
;
248 /* additional stripes go here */
249 } __attribute__ ((__packed__
));
251 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
253 BUG_ON(num_stripes
== 0);
254 return sizeof(struct btrfs_chunk
) +
255 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
258 #define BTRFS_FSID_SIZE 16
259 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
262 * every tree block (leaf or node) starts with this header.
264 struct btrfs_header
{
265 /* these first four must match the super block */
266 u8 csum
[BTRFS_CSUM_SIZE
];
267 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
268 __le64 bytenr
; /* which block this node is supposed to live in */
271 /* allowed to be different from the super from here on down */
272 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
277 } __attribute__ ((__packed__
));
279 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
280 sizeof(struct btrfs_header)) / \
281 sizeof(struct btrfs_key_ptr))
282 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
283 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
284 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
285 sizeof(struct btrfs_item) - \
286 sizeof(struct btrfs_file_extent_item))
288 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
291 * this is a very generous portion of the super block, giving us
292 * room to translate 14 chunks with 3 stripes each.
294 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
295 #define BTRFS_LABEL_SIZE 256
298 * the super block basically lists the main trees of the FS
299 * it currently lacks any block count etc etc
301 struct btrfs_super_block
{
302 u8 csum
[BTRFS_CSUM_SIZE
];
303 /* the first 4 fields must match struct btrfs_header */
304 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
305 __le64 bytenr
; /* this block number */
308 /* allowed to be different from the btrfs_header from here own down */
316 __le64 root_dir_objectid
;
322 __le32 sys_chunk_array_size
;
323 __le64 chunk_root_generation
;
325 __le64 compat_ro_flags
;
326 __le64 incompat_flags
;
331 struct btrfs_dev_item dev_item
;
332 char label
[BTRFS_LABEL_SIZE
];
333 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
334 } __attribute__ ((__packed__
));
337 * Compat flags that we support. If any incompat flags are set other than the
338 * ones specified below then we will fail to mount
340 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
341 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
342 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
345 * A leaf is full of items. offset and size tell us where to find
346 * the item in the leaf (relative to the start of the data area)
349 struct btrfs_disk_key key
;
352 } __attribute__ ((__packed__
));
355 * leaves have an item area and a data area:
356 * [item0, item1....itemN] [free space] [dataN...data1, data0]
358 * The data is separate from the items to get the keys closer together
362 struct btrfs_header header
;
363 struct btrfs_item items
[];
364 } __attribute__ ((__packed__
));
367 * all non-leaf blocks are nodes, they hold only keys and pointers to
370 struct btrfs_key_ptr
{
371 struct btrfs_disk_key key
;
374 } __attribute__ ((__packed__
));
377 struct btrfs_header header
;
378 struct btrfs_key_ptr ptrs
[];
379 } __attribute__ ((__packed__
));
382 * btrfs_paths remember the path taken from the root down to the leaf.
383 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
384 * to any other levels that are present.
386 * The slots array records the index of the item or block pointer
387 * used while walking the tree.
390 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
391 int slots
[BTRFS_MAX_LEVEL
];
392 /* if there is real range locking, this locks field will change */
393 int locks
[BTRFS_MAX_LEVEL
];
395 /* keep some upper locks as we walk down */
402 * items in the extent btree are used to record the objectid of the
403 * owner of the block and the number of references
405 struct btrfs_extent_item
{
407 } __attribute__ ((__packed__
));
409 struct btrfs_extent_ref
{
414 } __attribute__ ((__packed__
));
416 /* dev extents record free space on individual devices. The owner
417 * field points back to the chunk allocation mapping tree that allocated
418 * the extent. The chunk tree uuid field is a way to double check the owner
420 struct btrfs_dev_extent
{
422 __le64 chunk_objectid
;
425 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
426 } __attribute__ ((__packed__
));
428 struct btrfs_inode_ref
{
432 } __attribute__ ((__packed__
));
434 struct btrfs_timespec
{
437 } __attribute__ ((__packed__
));
440 BTRFS_COMPRESS_NONE
= 0,
441 BTRFS_COMPRESS_ZLIB
= 1,
442 BTRFS_COMPRESS_LAST
= 2,
443 } btrfs_compression_type
;
445 /* we don't understand any encryption methods right now */
447 BTRFS_ENCRYPTION_NONE
= 0,
448 BTRFS_ENCRYPTION_LAST
= 1,
449 } btrfs_encryption_type
;
451 struct btrfs_inode_item
{
452 /* nfs style generation number */
454 /* transid that last touched this inode */
466 struct btrfs_timespec atime
;
467 struct btrfs_timespec ctime
;
468 struct btrfs_timespec mtime
;
469 struct btrfs_timespec otime
;
470 } __attribute__ ((__packed__
));
472 struct btrfs_dir_log_item
{
474 } __attribute__ ((__packed__
));
476 struct btrfs_dir_item
{
477 struct btrfs_disk_key location
;
482 } __attribute__ ((__packed__
));
484 struct btrfs_root_item
{
485 struct btrfs_inode_item inode
;
491 __le64 last_snapshot
;
494 struct btrfs_disk_key drop_progress
;
497 } __attribute__ ((__packed__
));
500 * this is used for both forward and backward root refs
502 struct btrfs_root_ref
{
506 } __attribute__ ((__packed__
));
508 #define BTRFS_FILE_EXTENT_INLINE 0
509 #define BTRFS_FILE_EXTENT_REG 1
510 #define BTRFS_FILE_EXTENT_PREALLOC 2
512 struct btrfs_file_extent_item
{
514 * transaction id that created this extent
518 * max number of bytes to hold this extent in ram
519 * when we split a compressed extent we can't know how big
520 * each of the resulting pieces will be. So, this is
521 * an upper limit on the size of the extent in ram instead of
527 * 32 bits for the various ways we might encode the data,
528 * including compression and encryption. If any of these
529 * are set to something a given disk format doesn't understand
530 * it is treated like an incompat flag for reading and writing,
535 __le16 other_encoding
; /* spare for later use */
537 /* are we inline data or a real extent? */
541 * disk space consumed by the extent, checksum blocks are included
545 __le64 disk_num_bytes
;
547 * the logical offset in file blocks (no csums)
548 * this extent record is for. This allows a file extent to point
549 * into the middle of an existing extent on disk, sharing it
550 * between two snapshots (useful if some bytes in the middle of the
551 * extent have changed
555 * the logical number of file blocks (no csums included). This
556 * always reflects the size uncompressed and without encoding.
560 } __attribute__ ((__packed__
));
562 struct btrfs_csum_item
{
564 } __attribute__ ((__packed__
));
566 /* different types of block groups (and chunks) */
567 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
568 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
569 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
570 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
571 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
572 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
573 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
575 struct btrfs_block_group_item
{
577 __le64 chunk_objectid
;
579 } __attribute__ ((__packed__
));
581 struct btrfs_space_info
{
590 struct list_head list
;
592 /* for block groups in our same type */
593 struct list_head block_groups
;
595 struct rw_semaphore groups_sem
;
598 struct btrfs_free_space
{
599 struct rb_node bytes_index
;
600 struct rb_node offset_index
;
605 struct btrfs_block_group_cache
{
606 struct btrfs_key key
;
607 struct btrfs_block_group_item item
;
609 struct mutex alloc_mutex
;
610 struct mutex cache_mutex
;
618 struct btrfs_space_info
*space_info
;
620 /* free space cache stuff */
621 struct rb_root free_space_bytes
;
622 struct rb_root free_space_offset
;
624 /* block group cache stuff */
625 struct rb_node cache_node
;
627 /* for block groups in the same raid type */
628 struct list_head list
;
631 struct btrfs_leaf_ref_tree
{
633 struct list_head list
;
638 struct btrfs_fs_devices
;
639 struct btrfs_fs_info
{
640 u8 fsid
[BTRFS_FSID_SIZE
];
641 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
642 struct btrfs_root
*extent_root
;
643 struct btrfs_root
*tree_root
;
644 struct btrfs_root
*chunk_root
;
645 struct btrfs_root
*dev_root
;
646 struct btrfs_root
*fs_root
;
647 struct btrfs_root
*csum_root
;
649 /* the log root tree is a directory of all the other log roots */
650 struct btrfs_root
*log_root_tree
;
651 struct radix_tree_root fs_roots_radix
;
653 /* block group cache stuff */
654 spinlock_t block_group_cache_lock
;
655 struct rb_root block_group_cache_tree
;
657 struct extent_io_tree pinned_extents
;
658 struct extent_io_tree pending_del
;
659 struct extent_io_tree extent_ins
;
661 /* logical->physical extent mapping */
662 struct btrfs_mapping_tree mapping_tree
;
665 u64 last_trans_committed
;
666 u64 last_trans_new_blockgroup
;
667 u64 open_ioctl_trans
;
668 unsigned long mount_opt
;
672 struct btrfs_transaction
*running_transaction
;
673 wait_queue_head_t transaction_throttle
;
674 wait_queue_head_t transaction_wait
;
676 wait_queue_head_t async_submit_wait
;
677 wait_queue_head_t tree_log_wait
;
679 struct btrfs_super_block super_copy
;
680 struct btrfs_super_block super_for_commit
;
681 struct block_device
*__bdev
;
682 struct super_block
*sb
;
683 struct inode
*btree_inode
;
684 struct backing_dev_info bdi
;
685 spinlock_t hash_lock
;
686 struct mutex trans_mutex
;
687 struct mutex tree_log_mutex
;
688 struct mutex transaction_kthread_mutex
;
689 struct mutex cleaner_mutex
;
690 struct mutex extent_ins_mutex
;
691 struct mutex pinned_mutex
;
692 struct mutex chunk_mutex
;
693 struct mutex drop_mutex
;
694 struct mutex volume_mutex
;
695 struct mutex tree_reloc_mutex
;
696 struct list_head trans_list
;
697 struct list_head hashers
;
698 struct list_head dead_roots
;
700 atomic_t nr_async_submits
;
701 atomic_t async_submit_draining
;
702 atomic_t nr_async_bios
;
703 atomic_t async_delalloc_pages
;
704 atomic_t tree_log_writers
;
705 atomic_t tree_log_commit
;
706 unsigned long tree_log_batch
;
707 u64 tree_log_transid
;
710 * this is used by the balancing code to wait for all the pending
713 spinlock_t ordered_extent_lock
;
714 struct list_head ordered_extents
;
715 struct list_head delalloc_inodes
;
718 * there is a pool of worker threads for checksumming during writes
719 * and a pool for checksumming after reads. This is because readers
720 * can run with FS locks held, and the writers may be waiting for
721 * those locks. We don't want ordering in the pending list to cause
722 * deadlocks, and so the two are serviced separately.
724 * A third pool does submit_bio to avoid deadlocking with the other
727 struct btrfs_workers workers
;
728 struct btrfs_workers delalloc_workers
;
729 struct btrfs_workers endio_workers
;
730 struct btrfs_workers endio_meta_workers
;
731 struct btrfs_workers endio_write_workers
;
732 struct btrfs_workers submit_workers
;
734 * fixup workers take dirty pages that didn't properly go through
735 * the cow mechanism and make them safe to write. It happens
736 * for the sys_munmap function call path
738 struct btrfs_workers fixup_workers
;
739 struct task_struct
*transaction_kthread
;
740 struct task_struct
*cleaner_kthread
;
741 int thread_pool_size
;
743 /* tree relocation relocated fields */
744 struct list_head dead_reloc_roots
;
745 struct btrfs_leaf_ref_tree reloc_ref_tree
;
746 struct btrfs_leaf_ref_tree shared_ref_tree
;
748 struct kobject super_kobj
;
749 struct completion kobj_unregister
;
752 int log_root_recovering
;
754 atomic_t throttle_gen
;
757 struct list_head dirty_cowonly_roots
;
759 struct btrfs_fs_devices
*fs_devices
;
760 struct list_head space_info
;
761 spinlock_t delalloc_lock
;
762 spinlock_t new_trans_lock
;
767 spinlock_t ref_cache_lock
;
768 u64 total_ref_cache_size
;
770 u64 avail_data_alloc_bits
;
771 u64 avail_metadata_alloc_bits
;
772 u64 avail_system_alloc_bits
;
773 u64 data_alloc_profile
;
774 u64 metadata_alloc_profile
;
775 u64 system_alloc_profile
;
781 * in ram representation of the tree. extent_root is used for all allocations
782 * and for the extent tree extent_root root.
784 struct btrfs_dirty_root
;
786 struct extent_buffer
*node
;
788 /* the node lock is held while changing the node pointer */
789 spinlock_t node_lock
;
791 struct extent_buffer
*commit_root
;
792 struct btrfs_leaf_ref_tree
*ref_tree
;
793 struct btrfs_leaf_ref_tree ref_tree_struct
;
794 struct btrfs_dirty_root
*dirty_root
;
795 struct btrfs_root
*log_root
;
796 struct btrfs_root
*reloc_root
;
798 struct btrfs_root_item root_item
;
799 struct btrfs_key root_key
;
800 struct btrfs_fs_info
*fs_info
;
801 struct extent_io_tree dirty_log_pages
;
803 struct kobject root_kobj
;
804 struct completion kobj_unregister
;
805 struct mutex objectid_mutex
;
806 struct mutex log_mutex
;
811 /* data allocations are done in sectorsize units */
814 /* node allocations are done in nodesize units */
817 /* leaf allocations are done in leafsize units */
824 u64 last_inode_alloc
;
827 u64 defrag_trans_start
;
828 struct btrfs_key defrag_progress
;
829 struct btrfs_key defrag_max
;
835 /* the dirty list is only used by non-reference counted roots */
836 struct list_head dirty_list
;
838 spinlock_t list_lock
;
839 struct list_head dead_list
;
840 struct list_head orphan_list
;
843 * right now this just gets used so that a root has its own devid
844 * for stat. It may be used for more later
846 struct super_block anon_super
;
851 * inode items have the data typically returned from stat and store other
852 * info about object characteristics. There is one for every file and dir in
855 #define BTRFS_INODE_ITEM_KEY 1
856 #define BTRFS_INODE_REF_KEY 12
857 #define BTRFS_XATTR_ITEM_KEY 24
858 #define BTRFS_ORPHAN_ITEM_KEY 48
859 /* reserve 2-15 close to the inode for later flexibility */
862 * dir items are the name -> inode pointers in a directory. There is one
863 * for every name in a directory.
865 #define BTRFS_DIR_LOG_ITEM_KEY 60
866 #define BTRFS_DIR_LOG_INDEX_KEY 72
867 #define BTRFS_DIR_ITEM_KEY 84
868 #define BTRFS_DIR_INDEX_KEY 96
870 * extent data is for file data
872 #define BTRFS_EXTENT_DATA_KEY 108
875 * extent csums are stored in a separate tree and hold csums for
876 * an entire extent on disk.
878 #define BTRFS_EXTENT_CSUM_KEY 128
881 * root items point to tree roots. There are typically in the root
882 * tree used by the super block to find all the other trees
884 #define BTRFS_ROOT_ITEM_KEY 132
887 * root backrefs tie subvols and snapshots to the directory entries that
890 #define BTRFS_ROOT_BACKREF_KEY 144
893 * root refs make a fast index for listing all of the snapshots and
894 * subvolumes referenced by a given root. They point directly to the
895 * directory item in the root that references the subvol
897 #define BTRFS_ROOT_REF_KEY 156
900 * extent items are in the extent map tree. These record which blocks
901 * are used, and how many references there are to each block
903 #define BTRFS_EXTENT_ITEM_KEY 168
904 #define BTRFS_EXTENT_REF_KEY 180
907 * block groups give us hints into the extent allocation trees. Which
908 * blocks are free etc etc
910 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
912 #define BTRFS_DEV_EXTENT_KEY 204
913 #define BTRFS_DEV_ITEM_KEY 216
914 #define BTRFS_CHUNK_ITEM_KEY 228
917 * string items are for debugging. They just store a short string of
920 #define BTRFS_STRING_ITEM_KEY 253
922 #define BTRFS_MOUNT_NODATASUM (1 << 0)
923 #define BTRFS_MOUNT_NODATACOW (1 << 1)
924 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
925 #define BTRFS_MOUNT_SSD (1 << 3)
926 #define BTRFS_MOUNT_DEGRADED (1 << 4)
927 #define BTRFS_MOUNT_COMPRESS (1 << 5)
929 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
930 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
931 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
936 #define BTRFS_INODE_NODATASUM (1 << 0)
937 #define BTRFS_INODE_NODATACOW (1 << 1)
938 #define BTRFS_INODE_READONLY (1 << 2)
939 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
940 #define BTRFS_INODE_PREALLOC (1 << 4)
941 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
943 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
945 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
947 /* some macros to generate set/get funcs for the struct fields. This
948 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
951 #define le8_to_cpu(v) (v)
952 #define cpu_to_le8(v) (v)
955 #define read_eb_member(eb, ptr, type, member, result) ( \
956 read_extent_buffer(eb, (char *)(result), \
957 ((unsigned long)(ptr)) + \
958 offsetof(type, member), \
959 sizeof(((type *)0)->member)))
961 #define write_eb_member(eb, ptr, type, member, result) ( \
962 write_extent_buffer(eb, (char *)(result), \
963 ((unsigned long)(ptr)) + \
964 offsetof(type, member), \
965 sizeof(((type *)0)->member)))
967 #ifndef BTRFS_SETGET_FUNCS
968 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
969 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
970 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
973 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
974 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
976 type *p = kmap_atomic(eb->first_page, KM_USER0); \
977 u##bits res = le##bits##_to_cpu(p->member); \
978 kunmap_atomic(p, KM_USER0); \
981 static inline void btrfs_set_##name(struct extent_buffer *eb, \
984 type *p = kmap_atomic(eb->first_page, KM_USER0); \
985 p->member = cpu_to_le##bits(val); \
986 kunmap_atomic(p, KM_USER0); \
989 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
990 static inline u##bits btrfs_##name(type *s) \
992 return le##bits##_to_cpu(s->member); \
994 static inline void btrfs_set_##name(type *s, u##bits val) \
996 s->member = cpu_to_le##bits(val); \
999 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1000 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1001 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1002 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1003 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1004 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1005 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1006 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1007 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1008 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1009 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1011 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1012 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1014 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1016 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1018 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1020 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1022 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1023 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1025 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1027 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1029 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1032 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1034 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1037 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1039 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1042 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1043 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1044 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1045 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1046 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1047 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1048 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1049 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1050 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1051 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1052 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1054 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1056 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1059 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1060 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1061 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1063 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1065 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1067 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1069 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1070 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1072 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1074 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1075 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1077 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1080 unsigned long offset
= (unsigned long)c
;
1081 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1082 offset
+= nr
* sizeof(struct btrfs_stripe
);
1083 return (struct btrfs_stripe
*)offset
;
1086 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1088 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1091 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1092 struct btrfs_chunk
*c
, int nr
)
1094 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1097 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1098 struct btrfs_chunk
*c
, int nr
,
1101 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1104 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1105 struct btrfs_chunk
*c
, int nr
)
1107 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1110 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1111 struct btrfs_chunk
*c
, int nr
,
1114 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1117 /* struct btrfs_block_group_item */
1118 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1120 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1122 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1123 struct btrfs_block_group_item
, chunk_objectid
, 64);
1125 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1126 struct btrfs_block_group_item
, chunk_objectid
, 64);
1127 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1128 struct btrfs_block_group_item
, flags
, 64);
1129 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1130 struct btrfs_block_group_item
, flags
, 64);
1132 /* struct btrfs_inode_ref */
1133 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1134 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1136 /* struct btrfs_inode_item */
1137 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1138 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1139 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1140 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1141 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1142 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1143 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1144 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1145 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1146 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1147 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1149 static inline struct btrfs_timespec
*
1150 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1152 unsigned long ptr
= (unsigned long)inode_item
;
1153 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1154 return (struct btrfs_timespec
*)ptr
;
1157 static inline struct btrfs_timespec
*
1158 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1160 unsigned long ptr
= (unsigned long)inode_item
;
1161 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1162 return (struct btrfs_timespec
*)ptr
;
1165 static inline struct btrfs_timespec
*
1166 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1168 unsigned long ptr
= (unsigned long)inode_item
;
1169 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1170 return (struct btrfs_timespec
*)ptr
;
1173 static inline struct btrfs_timespec
*
1174 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1176 unsigned long ptr
= (unsigned long)inode_item
;
1177 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1178 return (struct btrfs_timespec
*)ptr
;
1181 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1182 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1184 /* struct btrfs_dev_extent */
1185 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1187 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1188 chunk_objectid
, 64);
1189 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1191 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1193 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1195 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1196 return (u8
*)((unsigned long)dev
+ ptr
);
1199 /* struct btrfs_extent_ref */
1200 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1201 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1202 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1203 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1205 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1206 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1208 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1210 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1213 /* struct btrfs_extent_item */
1214 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1215 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1218 /* struct btrfs_node */
1219 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1220 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1222 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1225 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1226 sizeof(struct btrfs_key_ptr
) * nr
;
1227 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1230 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1234 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1235 sizeof(struct btrfs_key_ptr
) * nr
;
1236 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1239 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1242 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1243 sizeof(struct btrfs_key_ptr
) * nr
;
1244 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1247 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1251 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1252 sizeof(struct btrfs_key_ptr
) * nr
;
1253 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1256 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1258 return offsetof(struct btrfs_node
, ptrs
) +
1259 sizeof(struct btrfs_key_ptr
) * nr
;
1262 void btrfs_node_key(struct extent_buffer
*eb
,
1263 struct btrfs_disk_key
*disk_key
, int nr
);
1265 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1266 struct btrfs_disk_key
*disk_key
, int nr
)
1269 ptr
= btrfs_node_key_ptr_offset(nr
);
1270 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1271 struct btrfs_key_ptr
, key
, disk_key
);
1274 /* struct btrfs_item */
1275 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1276 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1278 static inline unsigned long btrfs_item_nr_offset(int nr
)
1280 return offsetof(struct btrfs_leaf
, items
) +
1281 sizeof(struct btrfs_item
) * nr
;
1284 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1287 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1290 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1291 struct btrfs_item
*item
)
1293 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1296 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1298 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1301 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1303 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1306 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1308 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1311 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1312 struct btrfs_disk_key
*disk_key
, int nr
)
1314 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1315 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1318 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1319 struct btrfs_disk_key
*disk_key
, int nr
)
1321 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1322 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1325 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1328 * struct btrfs_root_ref
1330 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1331 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1332 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1334 /* struct btrfs_dir_item */
1335 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1336 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1337 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1338 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1340 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1341 struct btrfs_dir_item
*item
,
1342 struct btrfs_disk_key
*key
)
1344 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1347 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1348 struct btrfs_dir_item
*item
,
1349 struct btrfs_disk_key
*key
)
1351 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1354 /* struct btrfs_disk_key */
1355 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1357 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1358 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1360 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1361 struct btrfs_disk_key
*disk
)
1363 cpu
->offset
= le64_to_cpu(disk
->offset
);
1364 cpu
->type
= disk
->type
;
1365 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1368 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1369 struct btrfs_key
*cpu
)
1371 disk
->offset
= cpu_to_le64(cpu
->offset
);
1372 disk
->type
= cpu
->type
;
1373 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1376 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1377 struct btrfs_key
*key
, int nr
)
1379 struct btrfs_disk_key disk_key
;
1380 btrfs_node_key(eb
, &disk_key
, nr
);
1381 btrfs_disk_key_to_cpu(key
, &disk_key
);
1384 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1385 struct btrfs_key
*key
, int nr
)
1387 struct btrfs_disk_key disk_key
;
1388 btrfs_item_key(eb
, &disk_key
, nr
);
1389 btrfs_disk_key_to_cpu(key
, &disk_key
);
1392 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1393 struct btrfs_dir_item
*item
,
1394 struct btrfs_key
*key
)
1396 struct btrfs_disk_key disk_key
;
1397 btrfs_dir_item_key(eb
, item
, &disk_key
);
1398 btrfs_disk_key_to_cpu(key
, &disk_key
);
1402 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1407 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1412 /* struct btrfs_header */
1413 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1414 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1416 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1417 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1418 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1419 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1421 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1423 return (btrfs_header_flags(eb
) & flag
) == flag
;
1426 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1428 u64 flags
= btrfs_header_flags(eb
);
1429 btrfs_set_header_flags(eb
, flags
| flag
);
1430 return (flags
& flag
) == flag
;
1433 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1435 u64 flags
= btrfs_header_flags(eb
);
1436 btrfs_set_header_flags(eb
, flags
& ~flag
);
1437 return (flags
& flag
) == flag
;
1440 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1442 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1446 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1448 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1452 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1454 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1458 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1460 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1464 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1469 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1474 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1479 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1481 return (btrfs_header_level(eb
) == 0);
1484 /* struct btrfs_root_item */
1485 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1487 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1488 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1489 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1491 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1493 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1494 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1495 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1496 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1497 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1498 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1499 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1500 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1503 /* struct btrfs_super_block */
1505 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1506 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1507 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1509 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1510 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1511 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1512 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1513 struct btrfs_super_block
, chunk_root_generation
, 64);
1514 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1516 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1518 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1519 chunk_root_level
, 8);
1520 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1522 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1524 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1526 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1528 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1530 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1532 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1534 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1536 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1537 root_dir_objectid
, 64);
1538 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1540 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1542 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1544 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1545 incompat_flags
, 64);
1546 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1549 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1551 int t
= btrfs_super_csum_type(s
);
1552 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1553 return btrfs_csum_sizes
[t
];
1556 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1558 return offsetof(struct btrfs_leaf
, items
);
1561 /* struct btrfs_file_extent_item */
1562 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1564 static inline unsigned long btrfs_file_extent_inline_start(struct
1565 btrfs_file_extent_item
*e
)
1567 unsigned long offset
= (unsigned long)e
;
1568 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1572 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1574 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1577 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1579 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1581 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1582 disk_num_bytes
, 64);
1583 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1585 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1587 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1589 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1591 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1593 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1594 other_encoding
, 16);
1596 /* this returns the number of file bytes represented by the inline item.
1597 * If an item is compressed, this is the uncompressed size
1599 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1600 struct btrfs_file_extent_item
*e
)
1602 return btrfs_file_extent_ram_bytes(eb
, e
);
1606 * this returns the number of bytes used by the item on disk, minus the
1607 * size of any extent headers. If a file is compressed on disk, this is
1608 * the compressed size
1610 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1611 struct btrfs_item
*e
)
1613 unsigned long offset
;
1614 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1615 return btrfs_item_size(eb
, e
) - offset
;
1618 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1620 return sb
->s_fs_info
;
1623 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1624 const char *name
, int len
)
1626 /* if we already have a name just free it */
1630 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1634 memcpy(root
->name
, name
, len
);
1635 root
->name
[len
] ='\0';
1640 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1642 return root
->leafsize
;
1643 return root
->nodesize
;
1646 /* helper function to cast into the data area of the leaf. */
1647 #define btrfs_item_ptr(leaf, slot, type) \
1648 ((type *)(btrfs_leaf_data(leaf) + \
1649 btrfs_item_offset_nr(leaf, slot)))
1651 #define btrfs_item_ptr_offset(leaf, slot) \
1652 ((unsigned long)(btrfs_leaf_data(leaf) + \
1653 btrfs_item_offset_nr(leaf, slot)))
1655 static inline struct dentry
*fdentry(struct file
*file
)
1657 return file
->f_path
.dentry
;
1661 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1662 int btrfs_lookup_extent_ref(struct btrfs_trans_handle
*trans
,
1663 struct btrfs_root
*root
, u64 bytenr
,
1664 u64 num_bytes
, u32
*refs
);
1665 int btrfs_update_pinned_extents(struct btrfs_root
*root
,
1666 u64 bytenr
, u64 num
, int pin
);
1667 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1668 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1669 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
1670 struct btrfs_root
*root
, u64 bytenr
);
1671 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1672 struct btrfs_root
*root
);
1673 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1674 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1675 btrfs_fs_info
*info
,
1677 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1678 struct btrfs_block_group_cache
1679 *hint
, u64 search_start
,
1680 int data
, int owner
);
1681 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1682 struct btrfs_root
*root
,
1683 u32 blocksize
, u64 parent
,
1689 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1690 struct btrfs_root
*root
,
1691 u64 bytenr
, u32 blocksize
);
1692 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1693 struct btrfs_root
*root
,
1694 u64 num_bytes
, u64 parent
, u64 min_bytes
,
1695 u64 root_objectid
, u64 ref_generation
,
1696 u64 owner
, u64 empty_size
, u64 hint_byte
,
1697 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1698 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle
*trans
,
1699 struct btrfs_root
*root
, u64 parent
,
1700 u64 root_objectid
, u64 ref_generation
,
1701 u64 owner
, struct btrfs_key
*ins
);
1702 int btrfs_alloc_logged_extent(struct btrfs_trans_handle
*trans
,
1703 struct btrfs_root
*root
, u64 parent
,
1704 u64 root_objectid
, u64 ref_generation
,
1705 u64 owner
, struct btrfs_key
*ins
);
1706 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1707 struct btrfs_root
*root
,
1708 u64 num_bytes
, u64 min_alloc_size
,
1709 u64 empty_size
, u64 hint_byte
,
1710 u64 search_end
, struct btrfs_key
*ins
,
1712 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1713 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1715 int btrfs_cache_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1716 struct extent_buffer
*buf
, u32 nr_extents
);
1717 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1718 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1719 struct extent_buffer
*buf
, int start_slot
, int nr
);
1720 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1721 struct btrfs_root
*root
,
1722 u64 bytenr
, u64 num_bytes
, u64 parent
,
1723 u64 root_objectid
, u64 ref_generation
,
1724 u64 owner_objectid
, int pin
);
1725 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1726 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1727 struct btrfs_root
*root
,
1728 struct extent_io_tree
*unpin
);
1729 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1730 struct btrfs_root
*root
,
1731 u64 bytenr
, u64 num_bytes
, u64 parent
,
1732 u64 root_objectid
, u64 ref_generation
,
1733 u64 owner_objectid
);
1734 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1735 struct btrfs_root
*root
, u64 bytenr
,
1736 u64 orig_parent
, u64 parent
,
1737 u64 root_objectid
, u64 ref_generation
,
1738 u64 owner_objectid
);
1739 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1740 struct btrfs_root
*root
);
1741 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1742 int btrfs_read_block_groups(struct btrfs_root
*root
);
1743 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1744 struct btrfs_root
*root
, u64 bytes_used
,
1745 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1747 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
1748 struct btrfs_root
*root
, u64 group_start
);
1749 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
1750 int btrfs_free_reloc_root(struct btrfs_trans_handle
*trans
,
1751 struct btrfs_root
*root
);
1752 int btrfs_drop_dead_reloc_roots(struct btrfs_root
*root
);
1753 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle
*trans
,
1754 struct btrfs_root
*root
,
1755 struct extent_buffer
*buf
, u64 orig_start
);
1756 int btrfs_add_dead_reloc_root(struct btrfs_root
*root
);
1757 int btrfs_cleanup_reloc_trees(struct btrfs_root
*root
);
1758 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
1760 int btrfs_previous_item(struct btrfs_root
*root
,
1761 struct btrfs_path
*path
, u64 min_objectid
,
1763 int btrfs_merge_path(struct btrfs_trans_handle
*trans
,
1764 struct btrfs_root
*root
,
1765 struct btrfs_key
*node_keys
,
1766 u64
*nodes
, int lowest_level
);
1767 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1768 struct btrfs_root
*root
, struct btrfs_path
*path
,
1769 struct btrfs_key
*new_key
);
1770 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1771 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1772 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1773 struct btrfs_key
*key
, int lowest_level
,
1774 int cache_only
, u64 min_trans
);
1775 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1776 struct btrfs_key
*max_key
,
1777 struct btrfs_path
*path
, int cache_only
,
1779 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1780 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1781 struct extent_buffer
*parent
, int parent_slot
,
1782 struct extent_buffer
**cow_ret
, u64 prealloc_dest
);
1783 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1784 struct btrfs_root
*root
,
1785 struct extent_buffer
*buf
,
1786 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1787 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1788 *root
, struct btrfs_path
*path
, u32 data_size
);
1789 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1790 struct btrfs_root
*root
,
1791 struct btrfs_path
*path
,
1792 u32 new_size
, int from_end
);
1793 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1794 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1796 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1797 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1798 int start_slot
, int cache_only
, u64
*last_ret
,
1799 struct btrfs_key
*progress
);
1800 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1801 struct btrfs_path
*btrfs_alloc_path(void);
1802 void btrfs_free_path(struct btrfs_path
*p
);
1803 void btrfs_init_path(struct btrfs_path
*p
);
1804 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1805 struct btrfs_path
*path
, int slot
, int nr
);
1806 int btrfs_del_leaf(struct btrfs_trans_handle
*trans
,
1807 struct btrfs_root
*root
,
1808 struct btrfs_path
*path
, u64 bytenr
);
1809 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1810 struct btrfs_root
*root
,
1811 struct btrfs_path
*path
)
1813 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1816 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1817 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1818 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
1819 struct btrfs_root
*root
,
1820 struct btrfs_path
*path
,
1821 struct btrfs_key
*cpu_key
, u32
*data_size
,
1823 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1824 struct btrfs_root
*root
,
1825 struct btrfs_path
*path
,
1826 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1828 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1829 struct btrfs_root
*root
,
1830 struct btrfs_path
*path
,
1831 struct btrfs_key
*key
,
1834 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1837 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1838 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1839 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1840 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1842 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
1843 struct btrfs_root
*root
,
1844 struct extent_buffer
*node
,
1845 struct extent_buffer
*parent
);
1847 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
1848 struct btrfs_path
*path
,
1849 u64 root_id
, u64 ref_id
);
1850 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
1851 struct btrfs_root
*tree_root
,
1852 u64 root_id
, u8 type
, u64 ref_id
,
1853 u64 dirid
, u64 sequence
,
1854 const char *name
, int name_len
);
1855 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1856 struct btrfs_key
*key
);
1857 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1858 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1860 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1861 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1863 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1864 btrfs_root_item
*item
, struct btrfs_key
*key
);
1865 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
1866 u64
*found_objectid
);
1867 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1868 struct btrfs_root
*latest_root
);
1870 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1871 *root
, const char *name
, int name_len
, u64 dir
,
1872 struct btrfs_key
*location
, u8 type
, u64 index
);
1873 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1874 struct btrfs_root
*root
,
1875 struct btrfs_path
*path
, u64 dir
,
1876 const char *name
, int name_len
,
1878 struct btrfs_dir_item
*
1879 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1880 struct btrfs_root
*root
,
1881 struct btrfs_path
*path
, u64 dir
,
1882 u64 objectid
, const char *name
, int name_len
,
1884 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1885 struct btrfs_path
*path
,
1886 const char *name
, int name_len
);
1887 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1888 struct btrfs_root
*root
,
1889 struct btrfs_path
*path
,
1890 struct btrfs_dir_item
*di
);
1891 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1892 struct btrfs_root
*root
, const char *name
,
1893 u16 name_len
, const void *data
, u16 data_len
,
1895 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1896 struct btrfs_root
*root
,
1897 struct btrfs_path
*path
, u64 dir
,
1898 const char *name
, u16 name_len
,
1902 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
1903 struct btrfs_root
*root
, u64 offset
);
1904 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
1905 struct btrfs_root
*root
, u64 offset
);
1908 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1909 struct btrfs_root
*fs_root
,
1910 u64 dirid
, u64
*objectid
);
1911 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1914 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1915 struct btrfs_root
*root
,
1916 const char *name
, int name_len
,
1917 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1918 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1919 struct btrfs_root
*root
,
1920 const char *name
, int name_len
,
1921 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
1922 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1923 struct btrfs_root
*root
,
1924 struct btrfs_path
*path
, u64 objectid
);
1925 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1926 *root
, struct btrfs_path
*path
,
1927 struct btrfs_key
*location
, int mod
);
1930 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
1931 struct bio
*bio
, u32
*dst
);
1932 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1933 struct btrfs_root
*root
,
1934 u64 objectid
, u64 pos
,
1935 u64 disk_offset
, u64 disk_num_bytes
,
1936 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
1937 u8 compression
, u8 encryption
, u16 other_encoding
);
1938 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1939 struct btrfs_root
*root
,
1940 struct btrfs_path
*path
, u64 objectid
,
1941 u64 bytenr
, int mod
);
1942 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1943 struct btrfs_root
*root
,
1944 struct btrfs_ordered_sum
*sums
);
1945 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
1946 struct bio
*bio
, u64 file_start
, int contig
);
1947 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
1948 u64 start
, unsigned long len
);
1949 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1950 struct btrfs_root
*root
,
1951 struct btrfs_path
*path
,
1952 u64 bytenr
, int cow
);
1953 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1954 struct btrfs_root
*root
, struct btrfs_path
*path
,
1958 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1959 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1960 #define ClearPageChecked ClearPageFsMisc
1961 #define SetPageChecked SetPageFsMisc
1962 #define PageChecked PageFsMisc
1965 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
1966 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
1967 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
1968 struct btrfs_root
*root
,
1969 struct inode
*dir
, struct inode
*inode
,
1970 const char *name
, int name_len
);
1971 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
1972 struct inode
*parent_inode
, struct inode
*inode
,
1973 const char *name
, int name_len
, int add_backref
, u64 index
);
1974 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
1975 struct btrfs_root
*root
,
1976 struct inode
*inode
, u64 new_size
,
1979 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
);
1980 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
1981 int btrfs_writepages(struct address_space
*mapping
,
1982 struct writeback_control
*wbc
);
1983 int btrfs_create_subvol_root(struct btrfs_root
*new_root
, struct dentry
*dentry
,
1984 struct btrfs_trans_handle
*trans
, u64 new_dirid
,
1985 struct btrfs_block_group_cache
*block_group
);
1987 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
1988 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
1990 unsigned long btrfs_force_ra(struct address_space
*mapping
,
1991 struct file_ra_state
*ra
, struct file
*file
,
1992 pgoff_t offset
, pgoff_t last_index
);
1993 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
1995 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
1996 int btrfs_readpage(struct file
*file
, struct page
*page
);
1997 void btrfs_delete_inode(struct inode
*inode
);
1998 void btrfs_put_inode(struct inode
*inode
);
1999 void btrfs_read_locked_inode(struct inode
*inode
);
2000 int btrfs_write_inode(struct inode
*inode
, int wait
);
2001 void btrfs_dirty_inode(struct inode
*inode
);
2002 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2003 void btrfs_destroy_inode(struct inode
*inode
);
2004 int btrfs_init_cachep(void);
2005 void btrfs_destroy_cachep(void);
2006 long btrfs_ioctl_trans_end(struct file
*file
);
2007 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
2008 struct btrfs_root
*root
, int wait
);
2009 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
2010 struct btrfs_root
*root
);
2011 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2012 struct btrfs_root
*root
, int *is_new
);
2013 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2014 unsigned from
, unsigned to
);
2015 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2016 size_t page_offset
, u64 start
, u64 end
,
2018 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2019 struct btrfs_root
*root
,
2020 struct inode
*inode
);
2021 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2022 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2023 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2024 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2027 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2030 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
2031 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2033 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2034 extern struct file_operations btrfs_file_operations
;
2035 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
2036 struct btrfs_root
*root
, struct inode
*inode
,
2037 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
2038 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2039 struct btrfs_root
*root
,
2040 struct inode
*inode
, u64 start
, u64 end
);
2041 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2044 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2045 struct btrfs_root
*root
, int cache_only
);
2048 int btrfs_init_sysfs(void);
2049 void btrfs_exit_sysfs(void);
2050 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2051 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2052 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2053 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2056 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2059 u64
btrfs_parse_size(char *str
);
2060 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2061 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2064 int btrfs_check_acl(struct inode
*inode
, int mask
);
2065 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
2066 int btrfs_acl_chmod(struct inode
*inode
);
2068 /* free-space-cache.c */
2069 int btrfs_add_free_space(struct btrfs_block_group_cache
*block_group
,
2070 u64 bytenr
, u64 size
);
2071 int btrfs_add_free_space_lock(struct btrfs_block_group_cache
*block_group
,
2072 u64 offset
, u64 bytes
);
2073 int btrfs_remove_free_space(struct btrfs_block_group_cache
*block_group
,
2074 u64 bytenr
, u64 size
);
2075 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache
*block_group
,
2076 u64 offset
, u64 bytes
);
2077 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2079 struct btrfs_free_space
*btrfs_find_free_space(struct btrfs_block_group_cache
2080 *block_group
, u64 offset
,
2082 void btrfs_dump_free_space(struct btrfs_block_group_cache
*block_group
,
2084 u64
btrfs_block_group_free_space(struct btrfs_block_group_cache
*block_group
);