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 "_BDRfS_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
;
311 struct btrfs_dev_item dev_item
;
312 char label
[BTRFS_LABEL_SIZE
];
313 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
314 } __attribute__ ((__packed__
));
317 * A leaf is full of items. offset and size tell us where to find
318 * the item in the leaf (relative to the start of the data area)
321 struct btrfs_disk_key key
;
324 } __attribute__ ((__packed__
));
327 * leaves have an item area and a data area:
328 * [item0, item1....itemN] [free space] [dataN...data1, data0]
330 * The data is separate from the items to get the keys closer together
334 struct btrfs_header header
;
335 struct btrfs_item items
[];
336 } __attribute__ ((__packed__
));
339 * all non-leaf blocks are nodes, they hold only keys and pointers to
342 struct btrfs_key_ptr
{
343 struct btrfs_disk_key key
;
346 } __attribute__ ((__packed__
));
349 struct btrfs_header header
;
350 struct btrfs_key_ptr ptrs
[];
351 } __attribute__ ((__packed__
));
354 * btrfs_paths remember the path taken from the root down to the leaf.
355 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
356 * to any other levels that are present.
358 * The slots array records the index of the item or block pointer
359 * used while walking the tree.
362 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
363 int slots
[BTRFS_MAX_LEVEL
];
364 /* if there is real range locking, this locks field will change */
365 int locks
[BTRFS_MAX_LEVEL
];
367 /* keep some upper locks as we walk down */
374 * items in the extent btree are used to record the objectid of the
375 * owner of the block and the number of references
377 struct btrfs_extent_item
{
379 } __attribute__ ((__packed__
));
381 struct btrfs_extent_ref
{
386 } __attribute__ ((__packed__
));
388 /* dev extents record free space on individual devices. The owner
389 * field points back to the chunk allocation mapping tree that allocated
390 * the extent. The chunk tree uuid field is a way to double check the owner
392 struct btrfs_dev_extent
{
394 __le64 chunk_objectid
;
397 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
398 } __attribute__ ((__packed__
));
400 struct btrfs_inode_ref
{
404 } __attribute__ ((__packed__
));
406 struct btrfs_timespec
{
409 } __attribute__ ((__packed__
));
412 BTRFS_COMPRESS_NONE
= 0,
413 BTRFS_COMPRESS_ZLIB
= 1,
414 BTRFS_COMPRESS_LAST
= 2,
415 } btrfs_compression_type
;
417 /* we don't understand any encryption methods right now */
419 BTRFS_ENCRYPTION_NONE
= 0,
420 BTRFS_ENCRYPTION_LAST
= 1,
421 } btrfs_encryption_type
;
423 struct btrfs_inode_item
{
424 /* nfs style generation number */
426 /* transid that last touched this inode */
439 struct btrfs_timespec atime
;
440 struct btrfs_timespec ctime
;
441 struct btrfs_timespec mtime
;
442 struct btrfs_timespec otime
;
443 } __attribute__ ((__packed__
));
445 struct btrfs_dir_log_item
{
447 } __attribute__ ((__packed__
));
449 struct btrfs_dir_item
{
450 struct btrfs_disk_key location
;
455 } __attribute__ ((__packed__
));
457 struct btrfs_root_item
{
458 struct btrfs_inode_item inode
;
464 __le64 last_snapshot
;
467 struct btrfs_disk_key drop_progress
;
470 } __attribute__ ((__packed__
));
472 #define BTRFS_FILE_EXTENT_INLINE 0
473 #define BTRFS_FILE_EXTENT_REG 1
474 #define BTRFS_FILE_EXTENT_PREALLOC 2
476 struct btrfs_file_extent_item
{
478 * transaction id that created this extent
482 * max number of bytes to hold this extent in ram
483 * when we split a compressed extent we can't know how big
484 * each of the resulting pieces will be. So, this is
485 * an upper limit on the size of the extent in ram instead of
491 * 32 bits for the various ways we might encode the data,
492 * including compression and encryption. If any of these
493 * are set to something a given disk format doesn't understand
494 * it is treated like an incompat flag for reading and writing,
499 __le16 other_encoding
; /* spare for later use */
501 /* are we inline data or a real extent? */
505 * disk space consumed by the extent, checksum blocks are included
509 __le64 disk_num_bytes
;
511 * the logical offset in file blocks (no csums)
512 * this extent record is for. This allows a file extent to point
513 * into the middle of an existing extent on disk, sharing it
514 * between two snapshots (useful if some bytes in the middle of the
515 * extent have changed
519 * the logical number of file blocks (no csums included). This
520 * always reflects the size uncompressed and without encoding.
524 } __attribute__ ((__packed__
));
526 struct btrfs_csum_item
{
528 } __attribute__ ((__packed__
));
530 /* different types of block groups (and chunks) */
531 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
532 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
533 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
534 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
535 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
536 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
537 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
539 struct btrfs_block_group_item
{
541 __le64 chunk_objectid
;
543 } __attribute__ ((__packed__
));
545 struct btrfs_space_info
{
554 struct list_head list
;
556 /* for block groups in our same type */
557 struct list_head block_groups
;
559 struct rw_semaphore groups_sem
;
562 struct btrfs_free_space
{
563 struct rb_node bytes_index
;
564 struct rb_node offset_index
;
569 struct btrfs_block_group_cache
{
570 struct btrfs_key key
;
571 struct btrfs_block_group_item item
;
573 struct mutex alloc_mutex
;
581 struct btrfs_space_info
*space_info
;
583 /* free space cache stuff */
584 struct rb_root free_space_bytes
;
585 struct rb_root free_space_offset
;
587 /* block group cache stuff */
588 struct rb_node cache_node
;
590 /* for block groups in the same raid type */
591 struct list_head list
;
594 struct btrfs_leaf_ref_tree
{
596 struct list_head list
;
601 struct btrfs_fs_devices
;
602 struct btrfs_fs_info
{
603 u8 fsid
[BTRFS_FSID_SIZE
];
604 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
605 struct btrfs_root
*extent_root
;
606 struct btrfs_root
*tree_root
;
607 struct btrfs_root
*chunk_root
;
608 struct btrfs_root
*dev_root
;
609 struct btrfs_root
*fs_root
;
611 /* the log root tree is a directory of all the other log roots */
612 struct btrfs_root
*log_root_tree
;
613 struct radix_tree_root fs_roots_radix
;
615 /* block group cache stuff */
616 spinlock_t block_group_cache_lock
;
617 struct rb_root block_group_cache_tree
;
619 struct extent_io_tree pinned_extents
;
620 struct extent_io_tree pending_del
;
621 struct extent_io_tree extent_ins
;
623 /* logical->physical extent mapping */
624 struct btrfs_mapping_tree mapping_tree
;
627 u64 last_trans_committed
;
628 u64 last_trans_new_blockgroup
;
629 u64 open_ioctl_trans
;
630 unsigned long mount_opt
;
634 struct btrfs_transaction
*running_transaction
;
635 wait_queue_head_t transaction_throttle
;
636 wait_queue_head_t transaction_wait
;
638 wait_queue_head_t async_submit_wait
;
639 wait_queue_head_t tree_log_wait
;
641 struct btrfs_super_block super_copy
;
642 struct btrfs_super_block super_for_commit
;
643 struct block_device
*__bdev
;
644 struct super_block
*sb
;
645 struct inode
*btree_inode
;
646 struct backing_dev_info bdi
;
647 spinlock_t hash_lock
;
648 struct mutex trans_mutex
;
649 struct mutex tree_log_mutex
;
650 struct mutex transaction_kthread_mutex
;
651 struct mutex cleaner_mutex
;
652 struct mutex extent_ins_mutex
;
653 struct mutex pinned_mutex
;
654 struct mutex chunk_mutex
;
655 struct mutex drop_mutex
;
656 struct mutex volume_mutex
;
657 struct mutex tree_reloc_mutex
;
658 struct list_head trans_list
;
659 struct list_head hashers
;
660 struct list_head dead_roots
;
662 atomic_t nr_async_submits
;
663 atomic_t async_submit_draining
;
664 atomic_t nr_async_bios
;
665 atomic_t async_delalloc_pages
;
666 atomic_t tree_log_writers
;
667 atomic_t tree_log_commit
;
668 unsigned long tree_log_batch
;
669 u64 tree_log_transid
;
672 * this is used by the balancing code to wait for all the pending
675 spinlock_t ordered_extent_lock
;
676 struct list_head ordered_extents
;
677 struct list_head delalloc_inodes
;
680 * there is a pool of worker threads for checksumming during writes
681 * and a pool for checksumming after reads. This is because readers
682 * can run with FS locks held, and the writers may be waiting for
683 * those locks. We don't want ordering in the pending list to cause
684 * deadlocks, and so the two are serviced separately.
686 * A third pool does submit_bio to avoid deadlocking with the other
689 struct btrfs_workers workers
;
690 struct btrfs_workers delalloc_workers
;
691 struct btrfs_workers endio_workers
;
692 struct btrfs_workers endio_write_workers
;
693 struct btrfs_workers submit_workers
;
695 * fixup workers take dirty pages that didn't properly go through
696 * the cow mechanism and make them safe to write. It happens
697 * for the sys_munmap function call path
699 struct btrfs_workers fixup_workers
;
700 struct task_struct
*transaction_kthread
;
701 struct task_struct
*cleaner_kthread
;
702 int thread_pool_size
;
704 /* tree relocation relocated fields */
705 struct list_head dead_reloc_roots
;
706 struct btrfs_leaf_ref_tree reloc_ref_tree
;
707 struct btrfs_leaf_ref_tree shared_ref_tree
;
709 struct kobject super_kobj
;
710 struct completion kobj_unregister
;
713 int log_root_recovering
;
715 atomic_t throttle_gen
;
718 struct list_head dirty_cowonly_roots
;
720 struct btrfs_fs_devices
*fs_devices
;
721 struct list_head space_info
;
722 spinlock_t delalloc_lock
;
723 spinlock_t new_trans_lock
;
728 spinlock_t ref_cache_lock
;
729 u64 total_ref_cache_size
;
731 u64 avail_data_alloc_bits
;
732 u64 avail_metadata_alloc_bits
;
733 u64 avail_system_alloc_bits
;
734 u64 data_alloc_profile
;
735 u64 metadata_alloc_profile
;
736 u64 system_alloc_profile
;
742 * in ram representation of the tree. extent_root is used for all allocations
743 * and for the extent tree extent_root root.
745 struct btrfs_dirty_root
;
747 struct extent_buffer
*node
;
749 /* the node lock is held while changing the node pointer */
750 spinlock_t node_lock
;
752 struct extent_buffer
*commit_root
;
753 struct btrfs_leaf_ref_tree
*ref_tree
;
754 struct btrfs_leaf_ref_tree ref_tree_struct
;
755 struct btrfs_dirty_root
*dirty_root
;
756 struct btrfs_root
*log_root
;
757 struct btrfs_root
*reloc_root
;
759 struct btrfs_root_item root_item
;
760 struct btrfs_key root_key
;
761 struct btrfs_fs_info
*fs_info
;
762 struct extent_io_tree dirty_log_pages
;
764 struct kobject root_kobj
;
765 struct completion kobj_unregister
;
766 struct mutex objectid_mutex
;
767 struct mutex log_mutex
;
772 /* data allocations are done in sectorsize units */
775 /* node allocations are done in nodesize units */
778 /* leaf allocations are done in leafsize units */
785 u64 last_inode_alloc
;
788 u64 defrag_trans_start
;
789 struct btrfs_key defrag_progress
;
790 struct btrfs_key defrag_max
;
796 /* the dirty list is only used by non-reference counted roots */
797 struct list_head dirty_list
;
799 spinlock_t list_lock
;
800 struct list_head dead_list
;
801 struct list_head orphan_list
;
806 * inode items have the data typically returned from stat and store other
807 * info about object characteristics. There is one for every file and dir in
810 #define BTRFS_INODE_ITEM_KEY 1
811 #define BTRFS_INODE_REF_KEY 2
812 #define BTRFS_XATTR_ITEM_KEY 8
813 #define BTRFS_ORPHAN_ITEM_KEY 9
814 /* reserve 2-15 close to the inode for later flexibility */
817 * dir items are the name -> inode pointers in a directory. There is one
818 * for every name in a directory.
820 #define BTRFS_DIR_LOG_ITEM_KEY 14
821 #define BTRFS_DIR_LOG_INDEX_KEY 15
822 #define BTRFS_DIR_ITEM_KEY 16
823 #define BTRFS_DIR_INDEX_KEY 17
825 * extent data is for file data
827 #define BTRFS_EXTENT_DATA_KEY 18
829 * csum items have the checksums for data in the extents
831 #define BTRFS_CSUM_ITEM_KEY 19
834 /* reserve 21-31 for other file/dir stuff */
837 * root items point to tree roots. There are typically in the root
838 * tree used by the super block to find all the other trees
840 #define BTRFS_ROOT_ITEM_KEY 32
842 * extent items are in the extent map tree. These record which blocks
843 * are used, and how many references there are to each block
845 #define BTRFS_EXTENT_ITEM_KEY 33
846 #define BTRFS_EXTENT_REF_KEY 34
849 * block groups give us hints into the extent allocation trees. Which
850 * blocks are free etc etc
852 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
854 #define BTRFS_DEV_EXTENT_KEY 75
855 #define BTRFS_DEV_ITEM_KEY 76
856 #define BTRFS_CHUNK_ITEM_KEY 77
859 * string items are for debugging. They just store a short string of
862 #define BTRFS_STRING_ITEM_KEY 253
864 #define BTRFS_MOUNT_NODATASUM (1 << 0)
865 #define BTRFS_MOUNT_NODATACOW (1 << 1)
866 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
867 #define BTRFS_MOUNT_SSD (1 << 3)
868 #define BTRFS_MOUNT_DEGRADED (1 << 4)
869 #define BTRFS_MOUNT_COMPRESS (1 << 5)
871 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
872 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
873 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
878 #define BTRFS_INODE_NODATASUM (1 << 0)
879 #define BTRFS_INODE_NODATACOW (1 << 1)
880 #define BTRFS_INODE_READONLY (1 << 2)
881 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
882 #define BTRFS_INODE_PREALLOC (1 << 4)
883 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
885 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
887 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
889 /* some macros to generate set/get funcs for the struct fields. This
890 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
893 #define le8_to_cpu(v) (v)
894 #define cpu_to_le8(v) (v)
897 #define read_eb_member(eb, ptr, type, member, result) ( \
898 read_extent_buffer(eb, (char *)(result), \
899 ((unsigned long)(ptr)) + \
900 offsetof(type, member), \
901 sizeof(((type *)0)->member)))
903 #define write_eb_member(eb, ptr, type, member, result) ( \
904 write_extent_buffer(eb, (char *)(result), \
905 ((unsigned long)(ptr)) + \
906 offsetof(type, member), \
907 sizeof(((type *)0)->member)))
909 #ifndef BTRFS_SETGET_FUNCS
910 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
911 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
912 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
915 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
916 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
918 type *p = kmap_atomic(eb->first_page, KM_USER0); \
919 u##bits res = le##bits##_to_cpu(p->member); \
920 kunmap_atomic(p, KM_USER0); \
923 static inline void btrfs_set_##name(struct extent_buffer *eb, \
926 type *p = kmap_atomic(eb->first_page, KM_USER0); \
927 p->member = cpu_to_le##bits(val); \
928 kunmap_atomic(p, KM_USER0); \
931 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
932 static inline u##bits btrfs_##name(type *s) \
934 return le##bits##_to_cpu(s->member); \
936 static inline void btrfs_set_##name(type *s, u##bits val) \
938 s->member = cpu_to_le##bits(val); \
941 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
942 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
943 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
944 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
945 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
946 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
947 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
948 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
949 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
950 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
951 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
953 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
954 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
956 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
958 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
960 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
962 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
964 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
965 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
967 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
969 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
971 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
974 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
976 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
979 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
981 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
984 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
985 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
986 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
987 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
988 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
989 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
990 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
991 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
992 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
993 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
994 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
996 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
998 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1001 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1002 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1003 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1005 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1007 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1009 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1011 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1012 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1014 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1016 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1017 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1019 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1022 unsigned long offset
= (unsigned long)c
;
1023 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1024 offset
+= nr
* sizeof(struct btrfs_stripe
);
1025 return (struct btrfs_stripe
*)offset
;
1028 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1030 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1033 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1034 struct btrfs_chunk
*c
, int nr
)
1036 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1039 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1040 struct btrfs_chunk
*c
, int nr
,
1043 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1046 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1047 struct btrfs_chunk
*c
, int nr
)
1049 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1052 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1053 struct btrfs_chunk
*c
, int nr
,
1056 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1059 /* struct btrfs_block_group_item */
1060 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1062 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1064 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1065 struct btrfs_block_group_item
, chunk_objectid
, 64);
1067 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1068 struct btrfs_block_group_item
, chunk_objectid
, 64);
1069 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1070 struct btrfs_block_group_item
, flags
, 64);
1071 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1072 struct btrfs_block_group_item
, flags
, 64);
1074 /* struct btrfs_inode_ref */
1075 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1076 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1078 /* struct btrfs_inode_item */
1079 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1080 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1081 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1082 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1083 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1084 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1085 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1086 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1087 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1088 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1089 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
1090 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
1093 static inline struct btrfs_timespec
*
1094 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1096 unsigned long ptr
= (unsigned long)inode_item
;
1097 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1098 return (struct btrfs_timespec
*)ptr
;
1101 static inline struct btrfs_timespec
*
1102 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1104 unsigned long ptr
= (unsigned long)inode_item
;
1105 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1106 return (struct btrfs_timespec
*)ptr
;
1109 static inline struct btrfs_timespec
*
1110 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1112 unsigned long ptr
= (unsigned long)inode_item
;
1113 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1114 return (struct btrfs_timespec
*)ptr
;
1117 static inline struct btrfs_timespec
*
1118 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1120 unsigned long ptr
= (unsigned long)inode_item
;
1121 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1122 return (struct btrfs_timespec
*)ptr
;
1125 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1126 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1128 /* struct btrfs_dev_extent */
1129 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1131 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1132 chunk_objectid
, 64);
1133 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1135 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1137 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1139 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1140 return (u8
*)((unsigned long)dev
+ ptr
);
1143 /* struct btrfs_extent_ref */
1144 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1145 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1146 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1147 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1149 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1150 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1152 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1154 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1157 /* struct btrfs_extent_item */
1158 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1159 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1162 /* struct btrfs_node */
1163 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1164 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1166 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1169 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1170 sizeof(struct btrfs_key_ptr
) * nr
;
1171 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1174 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1178 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1179 sizeof(struct btrfs_key_ptr
) * nr
;
1180 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1183 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1186 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1187 sizeof(struct btrfs_key_ptr
) * nr
;
1188 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1191 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1195 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1196 sizeof(struct btrfs_key_ptr
) * nr
;
1197 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1200 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1202 return offsetof(struct btrfs_node
, ptrs
) +
1203 sizeof(struct btrfs_key_ptr
) * nr
;
1206 void btrfs_node_key(struct extent_buffer
*eb
,
1207 struct btrfs_disk_key
*disk_key
, int nr
);
1209 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1210 struct btrfs_disk_key
*disk_key
, int nr
)
1213 ptr
= btrfs_node_key_ptr_offset(nr
);
1214 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1215 struct btrfs_key_ptr
, key
, disk_key
);
1218 /* struct btrfs_item */
1219 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1220 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1222 static inline unsigned long btrfs_item_nr_offset(int nr
)
1224 return offsetof(struct btrfs_leaf
, items
) +
1225 sizeof(struct btrfs_item
) * nr
;
1228 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1231 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1234 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1235 struct btrfs_item
*item
)
1237 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1240 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1242 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1245 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1247 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1250 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1252 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1255 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1256 struct btrfs_disk_key
*disk_key
, int nr
)
1258 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1259 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1262 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1263 struct btrfs_disk_key
*disk_key
, int nr
)
1265 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1266 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1269 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1271 /* struct btrfs_dir_item */
1272 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1273 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1274 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1275 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1277 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1278 struct btrfs_dir_item
*item
,
1279 struct btrfs_disk_key
*key
)
1281 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1284 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1285 struct btrfs_dir_item
*item
,
1286 struct btrfs_disk_key
*key
)
1288 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1291 /* struct btrfs_disk_key */
1292 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1294 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1295 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1297 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1298 struct btrfs_disk_key
*disk
)
1300 cpu
->offset
= le64_to_cpu(disk
->offset
);
1301 cpu
->type
= disk
->type
;
1302 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1305 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1306 struct btrfs_key
*cpu
)
1308 disk
->offset
= cpu_to_le64(cpu
->offset
);
1309 disk
->type
= cpu
->type
;
1310 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1313 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1314 struct btrfs_key
*key
, int nr
)
1316 struct btrfs_disk_key disk_key
;
1317 btrfs_node_key(eb
, &disk_key
, nr
);
1318 btrfs_disk_key_to_cpu(key
, &disk_key
);
1321 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1322 struct btrfs_key
*key
, int nr
)
1324 struct btrfs_disk_key disk_key
;
1325 btrfs_item_key(eb
, &disk_key
, nr
);
1326 btrfs_disk_key_to_cpu(key
, &disk_key
);
1329 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1330 struct btrfs_dir_item
*item
,
1331 struct btrfs_key
*key
)
1333 struct btrfs_disk_key disk_key
;
1334 btrfs_dir_item_key(eb
, item
, &disk_key
);
1335 btrfs_disk_key_to_cpu(key
, &disk_key
);
1339 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1344 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1349 /* struct btrfs_header */
1350 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1351 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1353 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1354 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1355 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1356 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1358 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1360 return (btrfs_header_flags(eb
) & flag
) == flag
;
1363 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1365 u64 flags
= btrfs_header_flags(eb
);
1366 btrfs_set_header_flags(eb
, flags
| flag
);
1367 return (flags
& flag
) == flag
;
1370 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1372 u64 flags
= btrfs_header_flags(eb
);
1373 btrfs_set_header_flags(eb
, flags
& ~flag
);
1374 return (flags
& flag
) == flag
;
1377 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1379 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1383 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1385 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1389 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1391 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1395 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1397 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1401 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1406 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1411 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1416 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1418 return (btrfs_header_level(eb
) == 0);
1421 /* struct btrfs_root_item */
1422 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1424 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1425 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1426 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1428 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1430 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1431 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1432 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1433 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1434 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1435 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1436 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1437 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1440 /* struct btrfs_super_block */
1441 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1442 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1443 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1445 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1446 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1447 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1448 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1449 struct btrfs_super_block
, chunk_root_generation
, 64);
1450 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1452 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1454 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1455 chunk_root_level
, 8);
1456 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1458 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1460 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1462 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1464 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1466 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1468 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1470 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1472 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1473 root_dir_objectid
, 64);
1474 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1477 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1479 return offsetof(struct btrfs_leaf
, items
);
1482 /* struct btrfs_file_extent_item */
1483 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1485 static inline unsigned long btrfs_file_extent_inline_start(struct
1486 btrfs_file_extent_item
*e
)
1488 unsigned long offset
= (unsigned long)e
;
1489 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1493 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1495 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1498 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1500 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1502 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1503 disk_num_bytes
, 64);
1504 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1506 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1508 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1510 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1512 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1514 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1515 other_encoding
, 16);
1517 /* this returns the number of file bytes represented by the inline item.
1518 * If an item is compressed, this is the uncompressed size
1520 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1521 struct btrfs_file_extent_item
*e
)
1523 return btrfs_file_extent_ram_bytes(eb
, e
);
1527 * this returns the number of bytes used by the item on disk, minus the
1528 * size of any extent headers. If a file is compressed on disk, this is
1529 * the compressed size
1531 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1532 struct btrfs_item
*e
)
1534 unsigned long offset
;
1535 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1536 return btrfs_item_size(eb
, e
) - offset
;
1539 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1541 return sb
->s_fs_info
;
1544 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1545 const char *name
, int len
)
1547 /* if we already have a name just free it */
1551 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1555 memcpy(root
->name
, name
, len
);
1556 root
->name
[len
] ='\0';
1561 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1563 return root
->leafsize
;
1564 return root
->nodesize
;
1567 /* helper function to cast into the data area of the leaf. */
1568 #define btrfs_item_ptr(leaf, slot, type) \
1569 ((type *)(btrfs_leaf_data(leaf) + \
1570 btrfs_item_offset_nr(leaf, slot)))
1572 #define btrfs_item_ptr_offset(leaf, slot) \
1573 ((unsigned long)(btrfs_leaf_data(leaf) + \
1574 btrfs_item_offset_nr(leaf, slot)))
1576 static inline struct dentry
*fdentry(struct file
*file
)
1578 return file
->f_path
.dentry
;
1582 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1583 int btrfs_lookup_extent_ref(struct btrfs_trans_handle
*trans
,
1584 struct btrfs_root
*root
, u64 bytenr
,
1585 u64 num_bytes
, u32
*refs
);
1586 int btrfs_update_pinned_extents(struct btrfs_root
*root
,
1587 u64 bytenr
, u64 num
, int pin
);
1588 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1589 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1590 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
1591 struct btrfs_root
*root
, u64 bytenr
);
1592 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1593 struct btrfs_root
*root
);
1594 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1595 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1596 btrfs_fs_info
*info
,
1598 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1599 struct btrfs_block_group_cache
1600 *hint
, u64 search_start
,
1601 int data
, int owner
);
1602 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1603 struct btrfs_root
*root
,
1604 u32 blocksize
, u64 parent
,
1610 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1611 struct btrfs_root
*root
,
1612 u64 bytenr
, u32 blocksize
);
1613 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1614 struct btrfs_root
*root
,
1615 u64 num_bytes
, u64 parent
, u64 min_bytes
,
1616 u64 root_objectid
, u64 ref_generation
,
1617 u64 owner
, u64 empty_size
, u64 hint_byte
,
1618 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1619 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle
*trans
,
1620 struct btrfs_root
*root
, u64 parent
,
1621 u64 root_objectid
, u64 ref_generation
,
1622 u64 owner
, struct btrfs_key
*ins
);
1623 int btrfs_alloc_logged_extent(struct btrfs_trans_handle
*trans
,
1624 struct btrfs_root
*root
, u64 parent
,
1625 u64 root_objectid
, u64 ref_generation
,
1626 u64 owner
, struct btrfs_key
*ins
);
1627 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1628 struct btrfs_root
*root
,
1629 u64 num_bytes
, u64 min_alloc_size
,
1630 u64 empty_size
, u64 hint_byte
,
1631 u64 search_end
, struct btrfs_key
*ins
,
1633 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1634 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1636 int btrfs_cache_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1637 struct extent_buffer
*buf
, u32 nr_extents
);
1638 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1639 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1640 struct extent_buffer
*buf
, int start_slot
, int nr
);
1641 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1642 struct btrfs_root
*root
,
1643 u64 bytenr
, u64 num_bytes
, u64 parent
,
1644 u64 root_objectid
, u64 ref_generation
,
1645 u64 owner_objectid
, int pin
);
1646 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1647 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1648 struct btrfs_root
*root
,
1649 struct extent_io_tree
*unpin
);
1650 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1651 struct btrfs_root
*root
,
1652 u64 bytenr
, u64 num_bytes
, u64 parent
,
1653 u64 root_objectid
, u64 ref_generation
,
1654 u64 owner_objectid
);
1655 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1656 struct btrfs_root
*root
, u64 bytenr
,
1657 u64 orig_parent
, u64 parent
,
1658 u64 root_objectid
, u64 ref_generation
,
1659 u64 owner_objectid
);
1660 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1661 struct btrfs_root
*root
);
1662 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1663 int btrfs_read_block_groups(struct btrfs_root
*root
);
1664 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1665 struct btrfs_root
*root
, u64 bytes_used
,
1666 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1668 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
1669 struct btrfs_root
*root
, u64 group_start
);
1670 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
1671 int btrfs_free_reloc_root(struct btrfs_trans_handle
*trans
,
1672 struct btrfs_root
*root
);
1673 int btrfs_drop_dead_reloc_roots(struct btrfs_root
*root
);
1674 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle
*trans
,
1675 struct btrfs_root
*root
,
1676 struct extent_buffer
*buf
, u64 orig_start
);
1677 int btrfs_add_dead_reloc_root(struct btrfs_root
*root
);
1678 int btrfs_cleanup_reloc_trees(struct btrfs_root
*root
);
1679 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
1681 int btrfs_previous_item(struct btrfs_root
*root
,
1682 struct btrfs_path
*path
, u64 min_objectid
,
1684 int btrfs_merge_path(struct btrfs_trans_handle
*trans
,
1685 struct btrfs_root
*root
,
1686 struct btrfs_key
*node_keys
,
1687 u64
*nodes
, int lowest_level
);
1688 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1689 struct btrfs_root
*root
, struct btrfs_path
*path
,
1690 struct btrfs_key
*new_key
);
1691 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1692 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1693 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1694 struct btrfs_key
*key
, int lowest_level
,
1695 int cache_only
, u64 min_trans
);
1696 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1697 struct btrfs_key
*max_key
,
1698 struct btrfs_path
*path
, int cache_only
,
1700 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1701 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1702 struct extent_buffer
*parent
, int parent_slot
,
1703 struct extent_buffer
**cow_ret
, u64 prealloc_dest
);
1704 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1705 struct btrfs_root
*root
,
1706 struct extent_buffer
*buf
,
1707 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1708 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1709 *root
, struct btrfs_path
*path
, u32 data_size
);
1710 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1711 struct btrfs_root
*root
,
1712 struct btrfs_path
*path
,
1713 u32 new_size
, int from_end
);
1714 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1715 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1717 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1718 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1719 int start_slot
, int cache_only
, u64
*last_ret
,
1720 struct btrfs_key
*progress
);
1721 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1722 struct btrfs_path
*btrfs_alloc_path(void);
1723 void btrfs_free_path(struct btrfs_path
*p
);
1724 void btrfs_init_path(struct btrfs_path
*p
);
1725 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1726 struct btrfs_path
*path
, int slot
, int nr
);
1727 int btrfs_del_leaf(struct btrfs_trans_handle
*trans
,
1728 struct btrfs_root
*root
,
1729 struct btrfs_path
*path
, u64 bytenr
);
1730 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1731 struct btrfs_root
*root
,
1732 struct btrfs_path
*path
)
1734 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1737 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1738 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1739 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
1740 struct btrfs_root
*root
,
1741 struct btrfs_path
*path
,
1742 struct btrfs_key
*cpu_key
, u32
*data_size
,
1744 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1745 struct btrfs_root
*root
,
1746 struct btrfs_path
*path
,
1747 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1749 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1750 struct btrfs_root
*root
,
1751 struct btrfs_path
*path
,
1752 struct btrfs_key
*key
,
1755 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1758 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1759 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1760 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1761 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1763 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
1764 struct btrfs_root
*root
,
1765 struct extent_buffer
*node
,
1766 struct extent_buffer
*parent
);
1768 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1769 struct btrfs_key
*key
);
1770 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1771 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1773 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1774 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1776 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1777 btrfs_root_item
*item
, struct btrfs_key
*key
);
1778 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
1779 u64
*found_objectid
);
1780 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1781 struct btrfs_root
*latest_root
);
1783 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1784 *root
, const char *name
, int name_len
, u64 dir
,
1785 struct btrfs_key
*location
, u8 type
, u64 index
);
1786 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1787 struct btrfs_root
*root
,
1788 struct btrfs_path
*path
, u64 dir
,
1789 const char *name
, int name_len
,
1791 struct btrfs_dir_item
*
1792 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1793 struct btrfs_root
*root
,
1794 struct btrfs_path
*path
, u64 dir
,
1795 u64 objectid
, const char *name
, int name_len
,
1797 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1798 struct btrfs_path
*path
,
1799 const char *name
, int name_len
);
1800 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1801 struct btrfs_root
*root
,
1802 struct btrfs_path
*path
,
1803 struct btrfs_dir_item
*di
);
1804 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1805 struct btrfs_root
*root
, const char *name
,
1806 u16 name_len
, const void *data
, u16 data_len
,
1808 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1809 struct btrfs_root
*root
,
1810 struct btrfs_path
*path
, u64 dir
,
1811 const char *name
, u16 name_len
,
1815 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
1816 struct btrfs_root
*root
, u64 offset
);
1817 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
1818 struct btrfs_root
*root
, u64 offset
);
1821 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1822 struct btrfs_root
*fs_root
,
1823 u64 dirid
, u64
*objectid
);
1824 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1827 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1828 struct btrfs_root
*root
,
1829 const char *name
, int name_len
,
1830 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1831 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1832 struct btrfs_root
*root
,
1833 const char *name
, int name_len
,
1834 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
1835 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1836 struct btrfs_root
*root
,
1837 struct btrfs_path
*path
, u64 objectid
);
1838 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1839 *root
, struct btrfs_path
*path
,
1840 struct btrfs_key
*location
, int mod
);
1843 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
1845 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1846 struct btrfs_root
*root
,
1847 u64 objectid
, u64 pos
,
1848 u64 disk_offset
, u64 disk_num_bytes
,
1849 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
1850 u8 compression
, u8 encryption
, u16 other_encoding
);
1851 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1852 struct btrfs_root
*root
,
1853 struct btrfs_path
*path
, u64 objectid
,
1854 u64 bytenr
, int mod
);
1855 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1856 struct btrfs_root
*root
, struct inode
*inode
,
1857 struct btrfs_ordered_sum
*sums
);
1858 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
1860 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
1861 u64 start
, unsigned long len
);
1862 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1863 struct btrfs_root
*root
,
1864 struct btrfs_path
*path
,
1865 u64 objectid
, u64 offset
,
1867 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1868 struct btrfs_root
*root
, struct btrfs_path
*path
,
1872 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1873 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1874 #define ClearPageChecked ClearPageFsMisc
1875 #define SetPageChecked SetPageFsMisc
1876 #define PageChecked PageFsMisc
1879 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
1880 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
1881 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
1882 struct btrfs_root
*root
,
1883 struct inode
*dir
, struct inode
*inode
,
1884 const char *name
, int name_len
);
1885 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
1886 struct inode
*parent_inode
, struct inode
*inode
,
1887 const char *name
, int name_len
, int add_backref
, u64 index
);
1888 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
1889 struct btrfs_root
*root
,
1890 struct inode
*inode
, u64 new_size
,
1893 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
);
1894 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
1895 int btrfs_writepages(struct address_space
*mapping
,
1896 struct writeback_control
*wbc
);
1897 int btrfs_create_subvol_root(struct btrfs_root
*new_root
, struct dentry
*dentry
,
1898 struct btrfs_trans_handle
*trans
, u64 new_dirid
,
1899 struct btrfs_block_group_cache
*block_group
);
1901 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
1902 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
1904 unsigned long btrfs_force_ra(struct address_space
*mapping
,
1905 struct file_ra_state
*ra
, struct file
*file
,
1906 pgoff_t offset
, pgoff_t last_index
);
1907 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
1909 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
1910 int btrfs_readpage(struct file
*file
, struct page
*page
);
1911 void btrfs_delete_inode(struct inode
*inode
);
1912 void btrfs_put_inode(struct inode
*inode
);
1913 void btrfs_read_locked_inode(struct inode
*inode
);
1914 int btrfs_write_inode(struct inode
*inode
, int wait
);
1915 void btrfs_dirty_inode(struct inode
*inode
);
1916 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
1917 void btrfs_destroy_inode(struct inode
*inode
);
1918 int btrfs_init_cachep(void);
1919 void btrfs_destroy_cachep(void);
1920 long btrfs_ioctl_trans_end(struct file
*file
);
1921 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
1922 struct btrfs_root
*root
, int wait
);
1923 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
1924 struct btrfs_root
*root
);
1925 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
1926 struct btrfs_root
*root
, int *is_new
);
1927 int btrfs_commit_write(struct file
*file
, struct page
*page
,
1928 unsigned from
, unsigned to
);
1929 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
1930 size_t page_offset
, u64 start
, u64 end
,
1932 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
1933 struct btrfs_root
*root
,
1934 struct inode
*inode
);
1935 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
1936 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
1937 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
1938 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
1941 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
1944 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
1945 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
1947 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
1948 extern struct file_operations btrfs_file_operations
;
1949 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
1950 struct btrfs_root
*root
, struct inode
*inode
,
1951 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
1952 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
1953 struct btrfs_root
*root
,
1954 struct inode
*inode
, u64 start
, u64 end
);
1955 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
1958 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
1959 struct btrfs_root
*root
, int cache_only
);
1962 int btrfs_init_sysfs(void);
1963 void btrfs_exit_sysfs(void);
1964 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
1965 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
1966 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
1967 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
1970 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
1973 u64
btrfs_parse_size(char *str
);
1974 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
1975 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
1978 int btrfs_check_acl(struct inode
*inode
, int mask
);
1979 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
1980 int btrfs_acl_chmod(struct inode
*inode
);
1982 /* free-space-cache.c */
1983 int btrfs_add_free_space(struct btrfs_block_group_cache
*block_group
,
1984 u64 bytenr
, u64 size
);
1985 int btrfs_add_free_space_lock(struct btrfs_block_group_cache
*block_group
,
1986 u64 offset
, u64 bytes
);
1987 int btrfs_remove_free_space(struct btrfs_block_group_cache
*block_group
,
1988 u64 bytenr
, u64 size
);
1989 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache
*block_group
,
1990 u64 offset
, u64 bytes
);
1991 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
1993 struct btrfs_free_space
*btrfs_find_free_space(struct btrfs_block_group_cache
1994 *block_group
, u64 offset
,
1996 void btrfs_dump_free_space(struct btrfs_block_group_cache
*block_group
,
1998 u64
btrfs_block_group_free_space(struct btrfs_block_group_cache
*block_group
);