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 "_BFRfS_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 /* orhpan objectid for tracking unlinked/truncated files */
77 #define BTRFS_ORPHAN_OBJECTID -5ULL
79 /* does write ahead logging to speed up fsyncs */
80 #define BTRFS_TREE_LOG_OBJECTID -6ULL
81 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
83 /* for space balancing */
84 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
85 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
87 /* dummy objectid represents multiple objectids */
88 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
91 * All files have objectids in this range.
93 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
94 #define BTRFS_LAST_FREE_OBJECTID -256ULL
95 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
99 * the device items go into the chunk tree. The key is in the form
100 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
102 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
105 * we can actually store much bigger names, but lets not confuse the rest
108 #define BTRFS_NAME_LEN 255
110 /* 32 bytes in various csum fields */
111 #define BTRFS_CSUM_SIZE 32
112 /* four bytes for CRC32 */
113 #define BTRFS_CRC32_SIZE 4
114 #define BTRFS_EMPTY_DIR_SIZE 0
116 #define BTRFS_FT_UNKNOWN 0
117 #define BTRFS_FT_REG_FILE 1
118 #define BTRFS_FT_DIR 2
119 #define BTRFS_FT_CHRDEV 3
120 #define BTRFS_FT_BLKDEV 4
121 #define BTRFS_FT_FIFO 5
122 #define BTRFS_FT_SOCK 6
123 #define BTRFS_FT_SYMLINK 7
124 #define BTRFS_FT_XATTR 8
125 #define BTRFS_FT_MAX 9
128 * the key defines the order in the tree, and so it also defines (optimal)
129 * block layout. objectid corresonds to the inode number. The flags
130 * tells us things about the object, and is a kind of stream selector.
131 * so for a given inode, keys with flags of 1 might refer to the inode
132 * data, flags of 2 may point to file data in the btree and flags == 3
133 * may point to extents.
135 * offset is the starting byte offset for this key in the stream.
137 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
138 * in cpu native order. Otherwise they are identical and their sizes
139 * should be the same (ie both packed)
141 struct btrfs_disk_key
{
145 } __attribute__ ((__packed__
));
151 } __attribute__ ((__packed__
));
153 struct btrfs_mapping_tree
{
154 struct extent_map_tree map_tree
;
157 #define BTRFS_UUID_SIZE 16
158 struct btrfs_dev_item
{
159 /* the internal btrfs device id */
162 /* size of the device */
168 /* optimal io alignment for this device */
171 /* optimal io width for this device */
174 /* minimal io size for this device */
177 /* type and info about this device */
180 /* expected generation for this device */
183 /* grouping information for allocation decisions */
186 /* seek speed 0-100 where 100 is fastest */
189 /* bandwidth 0-100 where 100 is fastest */
192 /* btrfs generated uuid for this device */
193 u8 uuid
[BTRFS_UUID_SIZE
];
195 /* uuid of FS who owns this device */
196 u8 fsid
[BTRFS_UUID_SIZE
];
197 } __attribute__ ((__packed__
));
199 struct btrfs_stripe
{
202 u8 dev_uuid
[BTRFS_UUID_SIZE
];
203 } __attribute__ ((__packed__
));
206 /* size of this chunk in bytes */
209 /* objectid of the root referencing this chunk */
215 /* optimal io alignment for this chunk */
218 /* optimal io width for this chunk */
221 /* minimal io size for this chunk */
224 /* 2^16 stripes is quite a lot, a second limit is the size of a single
229 /* sub stripes only matter for raid10 */
231 struct btrfs_stripe stripe
;
232 /* additional stripes go here */
233 } __attribute__ ((__packed__
));
235 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
237 BUG_ON(num_stripes
== 0);
238 return sizeof(struct btrfs_chunk
) +
239 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
242 #define BTRFS_FSID_SIZE 16
243 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
246 * every tree block (leaf or node) starts with this header.
248 struct btrfs_header
{
249 /* these first four must match the super block */
250 u8 csum
[BTRFS_CSUM_SIZE
];
251 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
252 __le64 bytenr
; /* which block this node is supposed to live in */
255 /* allowed to be different from the super from here on down */
256 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
261 } __attribute__ ((__packed__
));
263 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
264 sizeof(struct btrfs_header)) / \
265 sizeof(struct btrfs_key_ptr))
266 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
267 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
268 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
269 sizeof(struct btrfs_item) - \
270 sizeof(struct btrfs_file_extent_item))
272 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
275 * this is a very generous portion of the super block, giving us
276 * room to translate 14 chunks with 3 stripes each.
278 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
279 #define BTRFS_LABEL_SIZE 256
282 * the super block basically lists the main trees of the FS
283 * it currently lacks any block count etc etc
285 struct btrfs_super_block
{
286 u8 csum
[BTRFS_CSUM_SIZE
];
287 /* the first 4 fields must match struct btrfs_header */
288 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
289 __le64 bytenr
; /* this block number */
292 /* allowed to be different from the btrfs_header from here own down */
300 __le64 root_dir_objectid
;
306 __le32 sys_chunk_array_size
;
307 __le64 chunk_root_generation
;
309 __le64 compat_ro_flags
;
310 __le64 incompat_flags
;
314 struct btrfs_dev_item dev_item
;
315 char label
[BTRFS_LABEL_SIZE
];
316 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
317 } __attribute__ ((__packed__
));
320 * Compat flags that we support. If any incompat flags are set other than the
321 * ones specified below then we will fail to mount
323 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
324 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
325 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
328 * A leaf is full of items. offset and size tell us where to find
329 * the item in the leaf (relative to the start of the data area)
332 struct btrfs_disk_key key
;
335 } __attribute__ ((__packed__
));
338 * leaves have an item area and a data area:
339 * [item0, item1....itemN] [free space] [dataN...data1, data0]
341 * The data is separate from the items to get the keys closer together
345 struct btrfs_header header
;
346 struct btrfs_item items
[];
347 } __attribute__ ((__packed__
));
350 * all non-leaf blocks are nodes, they hold only keys and pointers to
353 struct btrfs_key_ptr
{
354 struct btrfs_disk_key key
;
357 } __attribute__ ((__packed__
));
360 struct btrfs_header header
;
361 struct btrfs_key_ptr ptrs
[];
362 } __attribute__ ((__packed__
));
365 * btrfs_paths remember the path taken from the root down to the leaf.
366 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
367 * to any other levels that are present.
369 * The slots array records the index of the item or block pointer
370 * used while walking the tree.
373 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
374 int slots
[BTRFS_MAX_LEVEL
];
375 /* if there is real range locking, this locks field will change */
376 int locks
[BTRFS_MAX_LEVEL
];
378 /* keep some upper locks as we walk down */
385 * items in the extent btree are used to record the objectid of the
386 * owner of the block and the number of references
388 struct btrfs_extent_item
{
390 } __attribute__ ((__packed__
));
392 struct btrfs_extent_ref
{
397 } __attribute__ ((__packed__
));
399 /* dev extents record free space on individual devices. The owner
400 * field points back to the chunk allocation mapping tree that allocated
401 * the extent. The chunk tree uuid field is a way to double check the owner
403 struct btrfs_dev_extent
{
405 __le64 chunk_objectid
;
408 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
409 } __attribute__ ((__packed__
));
411 struct btrfs_inode_ref
{
415 } __attribute__ ((__packed__
));
417 struct btrfs_timespec
{
420 } __attribute__ ((__packed__
));
423 BTRFS_COMPRESS_NONE
= 0,
424 BTRFS_COMPRESS_ZLIB
= 1,
425 BTRFS_COMPRESS_LAST
= 2,
426 } btrfs_compression_type
;
428 /* we don't understand any encryption methods right now */
430 BTRFS_ENCRYPTION_NONE
= 0,
431 BTRFS_ENCRYPTION_LAST
= 1,
432 } btrfs_encryption_type
;
434 struct btrfs_inode_item
{
435 /* nfs style generation number */
437 /* transid that last touched this inode */
449 struct btrfs_timespec atime
;
450 struct btrfs_timespec ctime
;
451 struct btrfs_timespec mtime
;
452 struct btrfs_timespec otime
;
453 } __attribute__ ((__packed__
));
455 struct btrfs_dir_log_item
{
457 } __attribute__ ((__packed__
));
459 struct btrfs_dir_item
{
460 struct btrfs_disk_key location
;
465 } __attribute__ ((__packed__
));
467 struct btrfs_root_item
{
468 struct btrfs_inode_item inode
;
474 __le64 last_snapshot
;
477 struct btrfs_disk_key drop_progress
;
480 } __attribute__ ((__packed__
));
483 * this is used for both forward and backward root refs
485 struct btrfs_root_ref
{
489 } __attribute__ ((__packed__
));
491 #define BTRFS_FILE_EXTENT_INLINE 0
492 #define BTRFS_FILE_EXTENT_REG 1
493 #define BTRFS_FILE_EXTENT_PREALLOC 2
495 struct btrfs_file_extent_item
{
497 * transaction id that created this extent
501 * max number of bytes to hold this extent in ram
502 * when we split a compressed extent we can't know how big
503 * each of the resulting pieces will be. So, this is
504 * an upper limit on the size of the extent in ram instead of
510 * 32 bits for the various ways we might encode the data,
511 * including compression and encryption. If any of these
512 * are set to something a given disk format doesn't understand
513 * it is treated like an incompat flag for reading and writing,
518 __le16 other_encoding
; /* spare for later use */
520 /* are we inline data or a real extent? */
524 * disk space consumed by the extent, checksum blocks are included
528 __le64 disk_num_bytes
;
530 * the logical offset in file blocks (no csums)
531 * this extent record is for. This allows a file extent to point
532 * into the middle of an existing extent on disk, sharing it
533 * between two snapshots (useful if some bytes in the middle of the
534 * extent have changed
538 * the logical number of file blocks (no csums included). This
539 * always reflects the size uncompressed and without encoding.
543 } __attribute__ ((__packed__
));
545 struct btrfs_csum_item
{
547 } __attribute__ ((__packed__
));
549 /* different types of block groups (and chunks) */
550 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
551 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
552 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
553 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
554 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
555 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
556 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
558 struct btrfs_block_group_item
{
560 __le64 chunk_objectid
;
562 } __attribute__ ((__packed__
));
564 struct btrfs_space_info
{
573 struct list_head list
;
575 /* for block groups in our same type */
576 struct list_head block_groups
;
578 struct rw_semaphore groups_sem
;
581 struct btrfs_free_space
{
582 struct rb_node bytes_index
;
583 struct rb_node offset_index
;
588 struct btrfs_block_group_cache
{
589 struct btrfs_key key
;
590 struct btrfs_block_group_item item
;
592 struct mutex alloc_mutex
;
593 struct mutex cache_mutex
;
601 struct btrfs_space_info
*space_info
;
603 /* free space cache stuff */
604 struct rb_root free_space_bytes
;
605 struct rb_root free_space_offset
;
607 /* block group cache stuff */
608 struct rb_node cache_node
;
610 /* for block groups in the same raid type */
611 struct list_head list
;
614 struct btrfs_leaf_ref_tree
{
616 struct list_head list
;
621 struct btrfs_fs_devices
;
622 struct btrfs_fs_info
{
623 u8 fsid
[BTRFS_FSID_SIZE
];
624 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
625 struct btrfs_root
*extent_root
;
626 struct btrfs_root
*tree_root
;
627 struct btrfs_root
*chunk_root
;
628 struct btrfs_root
*dev_root
;
629 struct btrfs_root
*fs_root
;
631 /* the log root tree is a directory of all the other log roots */
632 struct btrfs_root
*log_root_tree
;
633 struct radix_tree_root fs_roots_radix
;
635 /* block group cache stuff */
636 spinlock_t block_group_cache_lock
;
637 struct rb_root block_group_cache_tree
;
639 struct extent_io_tree pinned_extents
;
640 struct extent_io_tree pending_del
;
641 struct extent_io_tree extent_ins
;
643 /* logical->physical extent mapping */
644 struct btrfs_mapping_tree mapping_tree
;
647 u64 last_trans_committed
;
648 u64 last_trans_new_blockgroup
;
649 u64 open_ioctl_trans
;
650 unsigned long mount_opt
;
654 struct btrfs_transaction
*running_transaction
;
655 wait_queue_head_t transaction_throttle
;
656 wait_queue_head_t transaction_wait
;
658 wait_queue_head_t async_submit_wait
;
659 wait_queue_head_t tree_log_wait
;
661 struct btrfs_super_block super_copy
;
662 struct btrfs_super_block super_for_commit
;
663 struct block_device
*__bdev
;
664 struct super_block
*sb
;
665 struct inode
*btree_inode
;
666 struct backing_dev_info bdi
;
667 spinlock_t hash_lock
;
668 struct mutex trans_mutex
;
669 struct mutex tree_log_mutex
;
670 struct mutex transaction_kthread_mutex
;
671 struct mutex cleaner_mutex
;
672 struct mutex extent_ins_mutex
;
673 struct mutex pinned_mutex
;
674 struct mutex chunk_mutex
;
675 struct mutex drop_mutex
;
676 struct mutex volume_mutex
;
677 struct mutex tree_reloc_mutex
;
678 struct list_head trans_list
;
679 struct list_head hashers
;
680 struct list_head dead_roots
;
682 atomic_t nr_async_submits
;
683 atomic_t async_submit_draining
;
684 atomic_t nr_async_bios
;
685 atomic_t async_delalloc_pages
;
686 atomic_t tree_log_writers
;
687 atomic_t tree_log_commit
;
688 unsigned long tree_log_batch
;
689 u64 tree_log_transid
;
692 * this is used by the balancing code to wait for all the pending
695 spinlock_t ordered_extent_lock
;
696 struct list_head ordered_extents
;
697 struct list_head delalloc_inodes
;
700 * there is a pool of worker threads for checksumming during writes
701 * and a pool for checksumming after reads. This is because readers
702 * can run with FS locks held, and the writers may be waiting for
703 * those locks. We don't want ordering in the pending list to cause
704 * deadlocks, and so the two are serviced separately.
706 * A third pool does submit_bio to avoid deadlocking with the other
709 struct btrfs_workers workers
;
710 struct btrfs_workers delalloc_workers
;
711 struct btrfs_workers endio_workers
;
712 struct btrfs_workers endio_write_workers
;
713 struct btrfs_workers submit_workers
;
715 * fixup workers take dirty pages that didn't properly go through
716 * the cow mechanism and make them safe to write. It happens
717 * for the sys_munmap function call path
719 struct btrfs_workers fixup_workers
;
720 struct task_struct
*transaction_kthread
;
721 struct task_struct
*cleaner_kthread
;
722 int thread_pool_size
;
724 /* tree relocation relocated fields */
725 struct list_head dead_reloc_roots
;
726 struct btrfs_leaf_ref_tree reloc_ref_tree
;
727 struct btrfs_leaf_ref_tree shared_ref_tree
;
729 struct kobject super_kobj
;
730 struct completion kobj_unregister
;
733 int log_root_recovering
;
735 atomic_t throttle_gen
;
738 struct list_head dirty_cowonly_roots
;
740 struct btrfs_fs_devices
*fs_devices
;
741 struct list_head space_info
;
742 spinlock_t delalloc_lock
;
743 spinlock_t new_trans_lock
;
748 spinlock_t ref_cache_lock
;
749 u64 total_ref_cache_size
;
751 u64 avail_data_alloc_bits
;
752 u64 avail_metadata_alloc_bits
;
753 u64 avail_system_alloc_bits
;
754 u64 data_alloc_profile
;
755 u64 metadata_alloc_profile
;
756 u64 system_alloc_profile
;
762 * in ram representation of the tree. extent_root is used for all allocations
763 * and for the extent tree extent_root root.
765 struct btrfs_dirty_root
;
767 struct extent_buffer
*node
;
769 /* the node lock is held while changing the node pointer */
770 spinlock_t node_lock
;
772 struct extent_buffer
*commit_root
;
773 struct btrfs_leaf_ref_tree
*ref_tree
;
774 struct btrfs_leaf_ref_tree ref_tree_struct
;
775 struct btrfs_dirty_root
*dirty_root
;
776 struct btrfs_root
*log_root
;
777 struct btrfs_root
*reloc_root
;
779 struct btrfs_root_item root_item
;
780 struct btrfs_key root_key
;
781 struct btrfs_fs_info
*fs_info
;
782 struct extent_io_tree dirty_log_pages
;
784 struct kobject root_kobj
;
785 struct completion kobj_unregister
;
786 struct mutex objectid_mutex
;
787 struct mutex log_mutex
;
792 /* data allocations are done in sectorsize units */
795 /* node allocations are done in nodesize units */
798 /* leaf allocations are done in leafsize units */
805 u64 last_inode_alloc
;
808 u64 defrag_trans_start
;
809 struct btrfs_key defrag_progress
;
810 struct btrfs_key defrag_max
;
816 /* the dirty list is only used by non-reference counted roots */
817 struct list_head dirty_list
;
819 spinlock_t list_lock
;
820 struct list_head dead_list
;
821 struct list_head orphan_list
;
824 * right now this just gets used so that a root has its own devid
825 * for stat. It may be used for more later
827 struct super_block anon_super
;
832 * inode items have the data typically returned from stat and store other
833 * info about object characteristics. There is one for every file and dir in
836 #define BTRFS_INODE_ITEM_KEY 1
837 #define BTRFS_INODE_REF_KEY 12
838 #define BTRFS_XATTR_ITEM_KEY 24
839 #define BTRFS_ORPHAN_ITEM_KEY 48
840 /* reserve 2-15 close to the inode for later flexibility */
843 * dir items are the name -> inode pointers in a directory. There is one
844 * for every name in a directory.
846 #define BTRFS_DIR_LOG_ITEM_KEY 60
847 #define BTRFS_DIR_LOG_INDEX_KEY 72
848 #define BTRFS_DIR_ITEM_KEY 84
849 #define BTRFS_DIR_INDEX_KEY 96
851 * extent data is for file data
853 #define BTRFS_EXTENT_DATA_KEY 108
855 * csum items have the checksums for data in the extents
857 #define BTRFS_CSUM_ITEM_KEY 120
860 /* reserve 21-31 for other file/dir stuff */
863 * root items point to tree roots. There are typically in the root
864 * tree used by the super block to find all the other trees
866 #define BTRFS_ROOT_ITEM_KEY 132
869 * root backrefs tie subvols and snapshots to the directory entries that
872 #define BTRFS_ROOT_BACKREF_KEY 144
875 * root refs make a fast index for listing all of the snapshots and
876 * subvolumes referenced by a given root. They point directly to the
877 * directory item in the root that references the subvol
879 #define BTRFS_ROOT_REF_KEY 156
882 * extent items are in the extent map tree. These record which blocks
883 * are used, and how many references there are to each block
885 #define BTRFS_EXTENT_ITEM_KEY 168
886 #define BTRFS_EXTENT_REF_KEY 180
889 * block groups give us hints into the extent allocation trees. Which
890 * blocks are free etc etc
892 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
894 #define BTRFS_DEV_EXTENT_KEY 204
895 #define BTRFS_DEV_ITEM_KEY 216
896 #define BTRFS_CHUNK_ITEM_KEY 228
899 * string items are for debugging. They just store a short string of
902 #define BTRFS_STRING_ITEM_KEY 253
904 #define BTRFS_MOUNT_NODATASUM (1 << 0)
905 #define BTRFS_MOUNT_NODATACOW (1 << 1)
906 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
907 #define BTRFS_MOUNT_SSD (1 << 3)
908 #define BTRFS_MOUNT_DEGRADED (1 << 4)
909 #define BTRFS_MOUNT_COMPRESS (1 << 5)
911 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
912 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
913 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
918 #define BTRFS_INODE_NODATASUM (1 << 0)
919 #define BTRFS_INODE_NODATACOW (1 << 1)
920 #define BTRFS_INODE_READONLY (1 << 2)
921 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
922 #define BTRFS_INODE_PREALLOC (1 << 4)
923 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
925 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
927 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
929 /* some macros to generate set/get funcs for the struct fields. This
930 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
933 #define le8_to_cpu(v) (v)
934 #define cpu_to_le8(v) (v)
937 #define read_eb_member(eb, ptr, type, member, result) ( \
938 read_extent_buffer(eb, (char *)(result), \
939 ((unsigned long)(ptr)) + \
940 offsetof(type, member), \
941 sizeof(((type *)0)->member)))
943 #define write_eb_member(eb, ptr, type, member, result) ( \
944 write_extent_buffer(eb, (char *)(result), \
945 ((unsigned long)(ptr)) + \
946 offsetof(type, member), \
947 sizeof(((type *)0)->member)))
949 #ifndef BTRFS_SETGET_FUNCS
950 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
951 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
952 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
955 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
956 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
958 type *p = kmap_atomic(eb->first_page, KM_USER0); \
959 u##bits res = le##bits##_to_cpu(p->member); \
960 kunmap_atomic(p, KM_USER0); \
963 static inline void btrfs_set_##name(struct extent_buffer *eb, \
966 type *p = kmap_atomic(eb->first_page, KM_USER0); \
967 p->member = cpu_to_le##bits(val); \
968 kunmap_atomic(p, KM_USER0); \
971 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
972 static inline u##bits btrfs_##name(type *s) \
974 return le##bits##_to_cpu(s->member); \
976 static inline void btrfs_set_##name(type *s, u##bits val) \
978 s->member = cpu_to_le##bits(val); \
981 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
982 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
983 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
984 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
985 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
986 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
987 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
988 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
989 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
990 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
991 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
993 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
994 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
996 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
998 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1000 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1002 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1004 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1005 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1007 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1009 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1011 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1014 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1016 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1019 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1021 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1024 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1025 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1026 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1027 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1028 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1029 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1030 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1031 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1032 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1033 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1034 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1036 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1038 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1041 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1042 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1043 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1045 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1047 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1049 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1051 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1052 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1054 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1056 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1057 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1059 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1062 unsigned long offset
= (unsigned long)c
;
1063 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1064 offset
+= nr
* sizeof(struct btrfs_stripe
);
1065 return (struct btrfs_stripe
*)offset
;
1068 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1070 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1073 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1074 struct btrfs_chunk
*c
, int nr
)
1076 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1079 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1080 struct btrfs_chunk
*c
, int nr
,
1083 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1086 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1087 struct btrfs_chunk
*c
, int nr
)
1089 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1092 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1093 struct btrfs_chunk
*c
, int nr
,
1096 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1099 /* struct btrfs_block_group_item */
1100 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1102 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1104 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1105 struct btrfs_block_group_item
, chunk_objectid
, 64);
1107 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1108 struct btrfs_block_group_item
, chunk_objectid
, 64);
1109 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1110 struct btrfs_block_group_item
, flags
, 64);
1111 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1112 struct btrfs_block_group_item
, flags
, 64);
1114 /* struct btrfs_inode_ref */
1115 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1116 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1118 /* struct btrfs_inode_item */
1119 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1120 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1121 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1122 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1123 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1124 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1125 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1126 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1127 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1128 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1129 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1131 static inline struct btrfs_timespec
*
1132 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1134 unsigned long ptr
= (unsigned long)inode_item
;
1135 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1136 return (struct btrfs_timespec
*)ptr
;
1139 static inline struct btrfs_timespec
*
1140 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1142 unsigned long ptr
= (unsigned long)inode_item
;
1143 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1144 return (struct btrfs_timespec
*)ptr
;
1147 static inline struct btrfs_timespec
*
1148 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1150 unsigned long ptr
= (unsigned long)inode_item
;
1151 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1152 return (struct btrfs_timespec
*)ptr
;
1155 static inline struct btrfs_timespec
*
1156 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1158 unsigned long ptr
= (unsigned long)inode_item
;
1159 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1160 return (struct btrfs_timespec
*)ptr
;
1163 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1164 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1166 /* struct btrfs_dev_extent */
1167 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1169 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1170 chunk_objectid
, 64);
1171 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1173 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1175 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1177 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1178 return (u8
*)((unsigned long)dev
+ ptr
);
1181 /* struct btrfs_extent_ref */
1182 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1183 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1184 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1185 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1187 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1188 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1190 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1192 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1195 /* struct btrfs_extent_item */
1196 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1197 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1200 /* struct btrfs_node */
1201 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1202 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1204 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1207 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1208 sizeof(struct btrfs_key_ptr
) * nr
;
1209 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1212 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1216 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1217 sizeof(struct btrfs_key_ptr
) * nr
;
1218 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1221 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1224 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1225 sizeof(struct btrfs_key_ptr
) * nr
;
1226 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1229 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1233 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1234 sizeof(struct btrfs_key_ptr
) * nr
;
1235 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1238 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1240 return offsetof(struct btrfs_node
, ptrs
) +
1241 sizeof(struct btrfs_key_ptr
) * nr
;
1244 void btrfs_node_key(struct extent_buffer
*eb
,
1245 struct btrfs_disk_key
*disk_key
, int nr
);
1247 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1248 struct btrfs_disk_key
*disk_key
, int nr
)
1251 ptr
= btrfs_node_key_ptr_offset(nr
);
1252 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1253 struct btrfs_key_ptr
, key
, disk_key
);
1256 /* struct btrfs_item */
1257 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1258 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1260 static inline unsigned long btrfs_item_nr_offset(int nr
)
1262 return offsetof(struct btrfs_leaf
, items
) +
1263 sizeof(struct btrfs_item
) * nr
;
1266 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1269 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1272 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1273 struct btrfs_item
*item
)
1275 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1278 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1280 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1283 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1285 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1288 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1290 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1293 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1294 struct btrfs_disk_key
*disk_key
, int nr
)
1296 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1297 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1300 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1301 struct btrfs_disk_key
*disk_key
, int nr
)
1303 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1304 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1307 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1310 * struct btrfs_root_ref
1312 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1313 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1314 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1316 /* struct btrfs_dir_item */
1317 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1318 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1319 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1320 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1322 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1323 struct btrfs_dir_item
*item
,
1324 struct btrfs_disk_key
*key
)
1326 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1329 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1330 struct btrfs_dir_item
*item
,
1331 struct btrfs_disk_key
*key
)
1333 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1336 /* struct btrfs_disk_key */
1337 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1339 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1340 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1342 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1343 struct btrfs_disk_key
*disk
)
1345 cpu
->offset
= le64_to_cpu(disk
->offset
);
1346 cpu
->type
= disk
->type
;
1347 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1350 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1351 struct btrfs_key
*cpu
)
1353 disk
->offset
= cpu_to_le64(cpu
->offset
);
1354 disk
->type
= cpu
->type
;
1355 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1358 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1359 struct btrfs_key
*key
, int nr
)
1361 struct btrfs_disk_key disk_key
;
1362 btrfs_node_key(eb
, &disk_key
, nr
);
1363 btrfs_disk_key_to_cpu(key
, &disk_key
);
1366 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1367 struct btrfs_key
*key
, int nr
)
1369 struct btrfs_disk_key disk_key
;
1370 btrfs_item_key(eb
, &disk_key
, nr
);
1371 btrfs_disk_key_to_cpu(key
, &disk_key
);
1374 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1375 struct btrfs_dir_item
*item
,
1376 struct btrfs_key
*key
)
1378 struct btrfs_disk_key disk_key
;
1379 btrfs_dir_item_key(eb
, item
, &disk_key
);
1380 btrfs_disk_key_to_cpu(key
, &disk_key
);
1384 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1389 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1394 /* struct btrfs_header */
1395 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1396 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1398 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1399 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1400 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1401 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1403 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1405 return (btrfs_header_flags(eb
) & flag
) == flag
;
1408 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1410 u64 flags
= btrfs_header_flags(eb
);
1411 btrfs_set_header_flags(eb
, flags
| flag
);
1412 return (flags
& flag
) == flag
;
1415 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1417 u64 flags
= btrfs_header_flags(eb
);
1418 btrfs_set_header_flags(eb
, flags
& ~flag
);
1419 return (flags
& flag
) == flag
;
1422 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1424 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1428 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1430 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1434 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1436 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1440 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1442 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1446 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1451 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1456 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1461 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1463 return (btrfs_header_level(eb
) == 0);
1466 /* struct btrfs_root_item */
1467 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1469 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1470 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1471 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1473 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1475 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1476 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1477 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1478 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1479 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1480 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1481 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1482 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1485 /* struct btrfs_super_block */
1486 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1487 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1488 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1490 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1491 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1492 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1493 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1494 struct btrfs_super_block
, chunk_root_generation
, 64);
1495 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1497 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1499 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1500 chunk_root_level
, 8);
1501 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1503 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1505 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1507 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1509 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1511 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1513 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1515 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1517 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1518 root_dir_objectid
, 64);
1519 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1521 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1523 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1525 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1526 incompat_flags
, 64);
1528 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1530 return offsetof(struct btrfs_leaf
, items
);
1533 /* struct btrfs_file_extent_item */
1534 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1536 static inline unsigned long btrfs_file_extent_inline_start(struct
1537 btrfs_file_extent_item
*e
)
1539 unsigned long offset
= (unsigned long)e
;
1540 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1544 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1546 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1549 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1551 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1553 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1554 disk_num_bytes
, 64);
1555 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1557 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1559 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1561 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1563 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1565 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1566 other_encoding
, 16);
1568 /* this returns the number of file bytes represented by the inline item.
1569 * If an item is compressed, this is the uncompressed size
1571 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1572 struct btrfs_file_extent_item
*e
)
1574 return btrfs_file_extent_ram_bytes(eb
, e
);
1578 * this returns the number of bytes used by the item on disk, minus the
1579 * size of any extent headers. If a file is compressed on disk, this is
1580 * the compressed size
1582 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1583 struct btrfs_item
*e
)
1585 unsigned long offset
;
1586 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1587 return btrfs_item_size(eb
, e
) - offset
;
1590 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1592 return sb
->s_fs_info
;
1595 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1596 const char *name
, int len
)
1598 /* if we already have a name just free it */
1602 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1606 memcpy(root
->name
, name
, len
);
1607 root
->name
[len
] ='\0';
1612 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1614 return root
->leafsize
;
1615 return root
->nodesize
;
1618 /* helper function to cast into the data area of the leaf. */
1619 #define btrfs_item_ptr(leaf, slot, type) \
1620 ((type *)(btrfs_leaf_data(leaf) + \
1621 btrfs_item_offset_nr(leaf, slot)))
1623 #define btrfs_item_ptr_offset(leaf, slot) \
1624 ((unsigned long)(btrfs_leaf_data(leaf) + \
1625 btrfs_item_offset_nr(leaf, slot)))
1627 static inline struct dentry
*fdentry(struct file
*file
)
1629 return file
->f_path
.dentry
;
1633 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1634 int btrfs_lookup_extent_ref(struct btrfs_trans_handle
*trans
,
1635 struct btrfs_root
*root
, u64 bytenr
,
1636 u64 num_bytes
, u32
*refs
);
1637 int btrfs_update_pinned_extents(struct btrfs_root
*root
,
1638 u64 bytenr
, u64 num
, int pin
);
1639 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1640 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1641 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
1642 struct btrfs_root
*root
, u64 bytenr
);
1643 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1644 struct btrfs_root
*root
);
1645 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1646 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1647 btrfs_fs_info
*info
,
1649 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1650 struct btrfs_block_group_cache
1651 *hint
, u64 search_start
,
1652 int data
, int owner
);
1653 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1654 struct btrfs_root
*root
,
1655 u32 blocksize
, u64 parent
,
1661 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1662 struct btrfs_root
*root
,
1663 u64 bytenr
, u32 blocksize
);
1664 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1665 struct btrfs_root
*root
,
1666 u64 num_bytes
, u64 parent
, u64 min_bytes
,
1667 u64 root_objectid
, u64 ref_generation
,
1668 u64 owner
, u64 empty_size
, u64 hint_byte
,
1669 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1670 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle
*trans
,
1671 struct btrfs_root
*root
, u64 parent
,
1672 u64 root_objectid
, u64 ref_generation
,
1673 u64 owner
, struct btrfs_key
*ins
);
1674 int btrfs_alloc_logged_extent(struct btrfs_trans_handle
*trans
,
1675 struct btrfs_root
*root
, u64 parent
,
1676 u64 root_objectid
, u64 ref_generation
,
1677 u64 owner
, struct btrfs_key
*ins
);
1678 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1679 struct btrfs_root
*root
,
1680 u64 num_bytes
, u64 min_alloc_size
,
1681 u64 empty_size
, u64 hint_byte
,
1682 u64 search_end
, struct btrfs_key
*ins
,
1684 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1685 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1687 int btrfs_cache_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1688 struct extent_buffer
*buf
, u32 nr_extents
);
1689 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1690 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1691 struct extent_buffer
*buf
, int start_slot
, int nr
);
1692 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1693 struct btrfs_root
*root
,
1694 u64 bytenr
, u64 num_bytes
, u64 parent
,
1695 u64 root_objectid
, u64 ref_generation
,
1696 u64 owner_objectid
, int pin
);
1697 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1698 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1699 struct btrfs_root
*root
,
1700 struct extent_io_tree
*unpin
);
1701 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1702 struct btrfs_root
*root
,
1703 u64 bytenr
, u64 num_bytes
, u64 parent
,
1704 u64 root_objectid
, u64 ref_generation
,
1705 u64 owner_objectid
);
1706 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1707 struct btrfs_root
*root
, u64 bytenr
,
1708 u64 orig_parent
, u64 parent
,
1709 u64 root_objectid
, u64 ref_generation
,
1710 u64 owner_objectid
);
1711 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1712 struct btrfs_root
*root
);
1713 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1714 int btrfs_read_block_groups(struct btrfs_root
*root
);
1715 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1716 struct btrfs_root
*root
, u64 bytes_used
,
1717 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1719 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
1720 struct btrfs_root
*root
, u64 group_start
);
1721 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
1722 int btrfs_free_reloc_root(struct btrfs_trans_handle
*trans
,
1723 struct btrfs_root
*root
);
1724 int btrfs_drop_dead_reloc_roots(struct btrfs_root
*root
);
1725 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle
*trans
,
1726 struct btrfs_root
*root
,
1727 struct extent_buffer
*buf
, u64 orig_start
);
1728 int btrfs_add_dead_reloc_root(struct btrfs_root
*root
);
1729 int btrfs_cleanup_reloc_trees(struct btrfs_root
*root
);
1730 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
1732 int btrfs_previous_item(struct btrfs_root
*root
,
1733 struct btrfs_path
*path
, u64 min_objectid
,
1735 int btrfs_merge_path(struct btrfs_trans_handle
*trans
,
1736 struct btrfs_root
*root
,
1737 struct btrfs_key
*node_keys
,
1738 u64
*nodes
, int lowest_level
);
1739 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1740 struct btrfs_root
*root
, struct btrfs_path
*path
,
1741 struct btrfs_key
*new_key
);
1742 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1743 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1744 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1745 struct btrfs_key
*key
, int lowest_level
,
1746 int cache_only
, u64 min_trans
);
1747 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1748 struct btrfs_key
*max_key
,
1749 struct btrfs_path
*path
, int cache_only
,
1751 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1752 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1753 struct extent_buffer
*parent
, int parent_slot
,
1754 struct extent_buffer
**cow_ret
, u64 prealloc_dest
);
1755 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1756 struct btrfs_root
*root
,
1757 struct extent_buffer
*buf
,
1758 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1759 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1760 *root
, struct btrfs_path
*path
, u32 data_size
);
1761 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1762 struct btrfs_root
*root
,
1763 struct btrfs_path
*path
,
1764 u32 new_size
, int from_end
);
1765 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1766 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1768 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1769 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1770 int start_slot
, int cache_only
, u64
*last_ret
,
1771 struct btrfs_key
*progress
);
1772 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1773 struct btrfs_path
*btrfs_alloc_path(void);
1774 void btrfs_free_path(struct btrfs_path
*p
);
1775 void btrfs_init_path(struct btrfs_path
*p
);
1776 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1777 struct btrfs_path
*path
, int slot
, int nr
);
1778 int btrfs_del_leaf(struct btrfs_trans_handle
*trans
,
1779 struct btrfs_root
*root
,
1780 struct btrfs_path
*path
, u64 bytenr
);
1781 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1782 struct btrfs_root
*root
,
1783 struct btrfs_path
*path
)
1785 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1788 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1789 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1790 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
1791 struct btrfs_root
*root
,
1792 struct btrfs_path
*path
,
1793 struct btrfs_key
*cpu_key
, u32
*data_size
,
1795 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1796 struct btrfs_root
*root
,
1797 struct btrfs_path
*path
,
1798 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1800 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1801 struct btrfs_root
*root
,
1802 struct btrfs_path
*path
,
1803 struct btrfs_key
*key
,
1806 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1809 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1810 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1811 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1812 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1814 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
1815 struct btrfs_root
*root
,
1816 struct extent_buffer
*node
,
1817 struct extent_buffer
*parent
);
1819 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
1820 struct btrfs_path
*path
,
1821 u64 root_id
, u64 ref_id
);
1822 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
1823 struct btrfs_root
*tree_root
,
1824 u64 root_id
, u8 type
, u64 ref_id
,
1825 u64 dirid
, u64 sequence
,
1826 const char *name
, int name_len
);
1827 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1828 struct btrfs_key
*key
);
1829 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1830 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1832 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1833 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1835 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1836 btrfs_root_item
*item
, struct btrfs_key
*key
);
1837 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
1838 u64
*found_objectid
);
1839 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1840 struct btrfs_root
*latest_root
);
1842 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1843 *root
, const char *name
, int name_len
, u64 dir
,
1844 struct btrfs_key
*location
, u8 type
, u64 index
);
1845 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1846 struct btrfs_root
*root
,
1847 struct btrfs_path
*path
, u64 dir
,
1848 const char *name
, int name_len
,
1850 struct btrfs_dir_item
*
1851 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1852 struct btrfs_root
*root
,
1853 struct btrfs_path
*path
, u64 dir
,
1854 u64 objectid
, const char *name
, int name_len
,
1856 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1857 struct btrfs_path
*path
,
1858 const char *name
, int name_len
);
1859 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1860 struct btrfs_root
*root
,
1861 struct btrfs_path
*path
,
1862 struct btrfs_dir_item
*di
);
1863 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1864 struct btrfs_root
*root
, const char *name
,
1865 u16 name_len
, const void *data
, u16 data_len
,
1867 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1868 struct btrfs_root
*root
,
1869 struct btrfs_path
*path
, u64 dir
,
1870 const char *name
, u16 name_len
,
1874 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
1875 struct btrfs_root
*root
, u64 offset
);
1876 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
1877 struct btrfs_root
*root
, u64 offset
);
1880 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1881 struct btrfs_root
*fs_root
,
1882 u64 dirid
, u64
*objectid
);
1883 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1886 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1887 struct btrfs_root
*root
,
1888 const char *name
, int name_len
,
1889 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1890 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1891 struct btrfs_root
*root
,
1892 const char *name
, int name_len
,
1893 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
1894 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1895 struct btrfs_root
*root
,
1896 struct btrfs_path
*path
, u64 objectid
);
1897 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1898 *root
, struct btrfs_path
*path
,
1899 struct btrfs_key
*location
, int mod
);
1902 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
1904 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1905 struct btrfs_root
*root
,
1906 u64 objectid
, u64 pos
,
1907 u64 disk_offset
, u64 disk_num_bytes
,
1908 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
1909 u8 compression
, u8 encryption
, u16 other_encoding
);
1910 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1911 struct btrfs_root
*root
,
1912 struct btrfs_path
*path
, u64 objectid
,
1913 u64 bytenr
, int mod
);
1914 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1915 struct btrfs_root
*root
, struct inode
*inode
,
1916 struct btrfs_ordered_sum
*sums
);
1917 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
1919 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
1920 u64 start
, unsigned long len
);
1921 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1922 struct btrfs_root
*root
,
1923 struct btrfs_path
*path
,
1924 u64 objectid
, u64 offset
,
1926 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1927 struct btrfs_root
*root
, struct btrfs_path
*path
,
1931 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1932 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1933 #define ClearPageChecked ClearPageFsMisc
1934 #define SetPageChecked SetPageFsMisc
1935 #define PageChecked PageFsMisc
1938 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
1939 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
1940 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
1941 struct btrfs_root
*root
,
1942 struct inode
*dir
, struct inode
*inode
,
1943 const char *name
, int name_len
);
1944 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
1945 struct inode
*parent_inode
, struct inode
*inode
,
1946 const char *name
, int name_len
, int add_backref
, u64 index
);
1947 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
1948 struct btrfs_root
*root
,
1949 struct inode
*inode
, u64 new_size
,
1952 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
);
1953 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
1954 int btrfs_writepages(struct address_space
*mapping
,
1955 struct writeback_control
*wbc
);
1956 int btrfs_create_subvol_root(struct btrfs_root
*new_root
, struct dentry
*dentry
,
1957 struct btrfs_trans_handle
*trans
, u64 new_dirid
,
1958 struct btrfs_block_group_cache
*block_group
);
1960 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
1961 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
1963 unsigned long btrfs_force_ra(struct address_space
*mapping
,
1964 struct file_ra_state
*ra
, struct file
*file
,
1965 pgoff_t offset
, pgoff_t last_index
);
1966 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
1968 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
1969 int btrfs_readpage(struct file
*file
, struct page
*page
);
1970 void btrfs_delete_inode(struct inode
*inode
);
1971 void btrfs_put_inode(struct inode
*inode
);
1972 void btrfs_read_locked_inode(struct inode
*inode
);
1973 int btrfs_write_inode(struct inode
*inode
, int wait
);
1974 void btrfs_dirty_inode(struct inode
*inode
);
1975 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
1976 void btrfs_destroy_inode(struct inode
*inode
);
1977 int btrfs_init_cachep(void);
1978 void btrfs_destroy_cachep(void);
1979 long btrfs_ioctl_trans_end(struct file
*file
);
1980 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
1981 struct btrfs_root
*root
, int wait
);
1982 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
1983 struct btrfs_root
*root
);
1984 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
1985 struct btrfs_root
*root
, int *is_new
);
1986 int btrfs_commit_write(struct file
*file
, struct page
*page
,
1987 unsigned from
, unsigned to
);
1988 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
1989 size_t page_offset
, u64 start
, u64 end
,
1991 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
1992 struct btrfs_root
*root
,
1993 struct inode
*inode
);
1994 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
1995 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
1996 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
1997 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2000 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2003 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
2004 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2006 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2007 extern struct file_operations btrfs_file_operations
;
2008 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
2009 struct btrfs_root
*root
, struct inode
*inode
,
2010 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
2011 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2012 struct btrfs_root
*root
,
2013 struct inode
*inode
, u64 start
, u64 end
);
2014 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2017 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2018 struct btrfs_root
*root
, int cache_only
);
2021 int btrfs_init_sysfs(void);
2022 void btrfs_exit_sysfs(void);
2023 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2024 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2025 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2026 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2029 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2032 u64
btrfs_parse_size(char *str
);
2033 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2034 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2037 int btrfs_check_acl(struct inode
*inode
, int mask
);
2038 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
2039 int btrfs_acl_chmod(struct inode
*inode
);
2041 /* free-space-cache.c */
2042 int btrfs_add_free_space(struct btrfs_block_group_cache
*block_group
,
2043 u64 bytenr
, u64 size
);
2044 int btrfs_add_free_space_lock(struct btrfs_block_group_cache
*block_group
,
2045 u64 offset
, u64 bytes
);
2046 int btrfs_remove_free_space(struct btrfs_block_group_cache
*block_group
,
2047 u64 bytenr
, u64 size
);
2048 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache
*block_group
,
2049 u64 offset
, u64 bytes
);
2050 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2052 struct btrfs_free_space
*btrfs_find_free_space(struct btrfs_block_group_cache
2053 *block_group
, u64 offset
,
2055 void btrfs_dump_free_space(struct btrfs_block_group_cache
*block_group
,
2057 u64
btrfs_block_group_free_space(struct btrfs_block_group_cache
*block_group
);