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 "bit-radix.h"
31 #include "extent_io.h"
32 #include "extent_map.h"
33 #include "async-thread.h"
35 struct btrfs_trans_handle
;
36 struct btrfs_transaction
;
37 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
38 extern struct kmem_cache
*btrfs_transaction_cachep
;
39 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
40 extern struct kmem_cache
*btrfs_path_cachep
;
41 struct btrfs_ordered_sum
;
43 #define BTRFS_MAGIC "_B6RfS_M"
45 #define BTRFS_ACL_NOT_CACHED ((void *)-1)
48 # define BTRFS_MAX_LEVEL 7
50 # define BTRFS_MAX_LEVEL 8
53 /* holds pointers to all of the tree roots */
54 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
56 /* stores information about which extents are in use, and reference counts */
57 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
60 * chunk tree stores translations from logical -> physical block numbering
61 * the super block points to the chunk tree
63 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
66 * stores information about which areas of a given device are in use.
67 * one per device. The tree of tree roots points to the device tree
69 #define BTRFS_DEV_TREE_OBJECTID 4ULL
71 /* one per subvolume, storing files and directories */
72 #define BTRFS_FS_TREE_OBJECTID 5ULL
74 /* directory objectid inside the root tree */
75 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
77 /* orhpan objectid for tracking unlinked/truncated files */
78 #define BTRFS_ORPHAN_OBJECTID -5ULL
81 * All files have objectids higher than this.
83 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
84 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
88 * the device items go into the chunk tree. The key is in the form
89 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
91 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
94 * we can actually store much bigger names, but lets not confuse the rest
97 #define BTRFS_NAME_LEN 255
99 /* 32 bytes in various csum fields */
100 #define BTRFS_CSUM_SIZE 32
101 /* four bytes for CRC32 */
102 #define BTRFS_CRC32_SIZE 4
103 #define BTRFS_EMPTY_DIR_SIZE 0
105 #define BTRFS_FT_UNKNOWN 0
106 #define BTRFS_FT_REG_FILE 1
107 #define BTRFS_FT_DIR 2
108 #define BTRFS_FT_CHRDEV 3
109 #define BTRFS_FT_BLKDEV 4
110 #define BTRFS_FT_FIFO 5
111 #define BTRFS_FT_SOCK 6
112 #define BTRFS_FT_SYMLINK 7
113 #define BTRFS_FT_XATTR 8
114 #define BTRFS_FT_MAX 9
117 * the key defines the order in the tree, and so it also defines (optimal)
118 * block layout. objectid corresonds to the inode number. The flags
119 * tells us things about the object, and is a kind of stream selector.
120 * so for a given inode, keys with flags of 1 might refer to the inode
121 * data, flags of 2 may point to file data in the btree and flags == 3
122 * may point to extents.
124 * offset is the starting byte offset for this key in the stream.
126 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
127 * in cpu native order. Otherwise they are identical and their sizes
128 * should be the same (ie both packed)
130 struct btrfs_disk_key
{
134 } __attribute__ ((__packed__
));
140 } __attribute__ ((__packed__
));
142 struct btrfs_mapping_tree
{
143 struct extent_map_tree map_tree
;
146 #define BTRFS_UUID_SIZE 16
147 struct btrfs_dev_item
{
148 /* the internal btrfs device id */
151 /* size of the device */
157 /* optimal io alignment for this device */
160 /* optimal io width for this device */
163 /* minimal io size for this device */
166 /* type and info about this device */
169 /* grouping information for allocation decisions */
172 /* seek speed 0-100 where 100 is fastest */
175 /* bandwidth 0-100 where 100 is fastest */
178 /* btrfs generated uuid for this device */
179 u8 uuid
[BTRFS_UUID_SIZE
];
180 } __attribute__ ((__packed__
));
182 struct btrfs_stripe
{
185 u8 dev_uuid
[BTRFS_UUID_SIZE
];
186 } __attribute__ ((__packed__
));
189 /* size of this chunk in bytes */
192 /* objectid of the root referencing this chunk */
198 /* optimal io alignment for this chunk */
201 /* optimal io width for this chunk */
204 /* minimal io size for this chunk */
207 /* 2^16 stripes is quite a lot, a second limit is the size of a single
212 /* sub stripes only matter for raid10 */
214 struct btrfs_stripe stripe
;
215 /* additional stripes go here */
216 } __attribute__ ((__packed__
));
218 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
220 BUG_ON(num_stripes
== 0);
221 return sizeof(struct btrfs_chunk
) +
222 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
225 #define BTRFS_FSID_SIZE 16
226 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
229 * every tree block (leaf or node) starts with this header.
231 struct btrfs_header
{
232 /* these first four must match the super block */
233 u8 csum
[BTRFS_CSUM_SIZE
];
234 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
235 __le64 bytenr
; /* which block this node is supposed to live in */
238 /* allowed to be different from the super from here on down */
239 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
244 } __attribute__ ((__packed__
));
246 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
247 sizeof(struct btrfs_header)) / \
248 sizeof(struct btrfs_key_ptr))
249 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
250 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
251 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
252 sizeof(struct btrfs_item) - \
253 sizeof(struct btrfs_file_extent_item))
257 * this is a very generous portion of the super block, giving us
258 * room to translate 14 chunks with 3 stripes each.
260 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
261 #define BTRFS_LABEL_SIZE 256
264 * the super block basically lists the main trees of the FS
265 * it currently lacks any block count etc etc
267 struct btrfs_super_block
{
268 u8 csum
[BTRFS_CSUM_SIZE
];
269 /* the first 4 fields must match struct btrfs_header */
270 u8 fsid
[16]; /* FS specific uuid */
271 __le64 bytenr
; /* this block number */
274 /* allowed to be different from the btrfs_header from here own down */
281 __le64 root_dir_objectid
;
287 __le32 sys_chunk_array_size
;
290 struct btrfs_dev_item dev_item
;
291 char label
[BTRFS_LABEL_SIZE
];
292 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
293 } __attribute__ ((__packed__
));
296 * A leaf is full of items. offset and size tell us where to find
297 * the item in the leaf (relative to the start of the data area)
300 struct btrfs_disk_key key
;
303 } __attribute__ ((__packed__
));
306 * leaves have an item area and a data area:
307 * [item0, item1....itemN] [free space] [dataN...data1, data0]
309 * The data is separate from the items to get the keys closer together
313 struct btrfs_header header
;
314 struct btrfs_item items
[];
315 } __attribute__ ((__packed__
));
318 * all non-leaf blocks are nodes, they hold only keys and pointers to
321 struct btrfs_key_ptr
{
322 struct btrfs_disk_key key
;
325 } __attribute__ ((__packed__
));
328 struct btrfs_header header
;
329 struct btrfs_key_ptr ptrs
[];
330 } __attribute__ ((__packed__
));
333 * btrfs_paths remember the path taken from the root down to the leaf.
334 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
335 * to any other levels that are present.
337 * The slots array records the index of the item or block pointer
338 * used while walking the tree.
341 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
342 int slots
[BTRFS_MAX_LEVEL
];
343 /* if there is real range locking, this locks field will change */
344 int locks
[BTRFS_MAX_LEVEL
];
346 /* keep some upper locks as we walk down */
353 * items in the extent btree are used to record the objectid of the
354 * owner of the block and the number of references
356 struct btrfs_extent_item
{
358 } __attribute__ ((__packed__
));
360 struct btrfs_extent_ref
{
365 } __attribute__ ((__packed__
));
367 /* dev extents record free space on individual devices. The owner
368 * field points back to the chunk allocation mapping tree that allocated
369 * the extent. The chunk tree uuid field is a way to double check the owner
371 struct btrfs_dev_extent
{
373 __le64 chunk_objectid
;
376 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
377 } __attribute__ ((__packed__
));
379 struct btrfs_inode_ref
{
383 } __attribute__ ((__packed__
));
385 struct btrfs_timespec
{
388 } __attribute__ ((__packed__
));
391 * there is no padding here on purpose. If you want to extent the inode,
392 * make a new item type
394 struct btrfs_inode_item
{
406 struct btrfs_timespec atime
;
407 struct btrfs_timespec ctime
;
408 struct btrfs_timespec mtime
;
409 struct btrfs_timespec otime
;
410 } __attribute__ ((__packed__
));
412 struct btrfs_dir_item
{
413 struct btrfs_disk_key location
;
417 } __attribute__ ((__packed__
));
419 struct btrfs_root_item
{
420 struct btrfs_inode_item inode
;
427 struct btrfs_disk_key drop_progress
;
430 } __attribute__ ((__packed__
));
432 #define BTRFS_FILE_EXTENT_REG 0
433 #define BTRFS_FILE_EXTENT_INLINE 1
435 struct btrfs_file_extent_item
{
439 * disk space consumed by the extent, checksum blocks are included
443 __le64 disk_num_bytes
;
445 * the logical offset in file blocks (no csums)
446 * this extent record is for. This allows a file extent to point
447 * into the middle of an existing extent on disk, sharing it
448 * between two snapshots (useful if some bytes in the middle of the
449 * extent have changed
453 * the logical number of file blocks (no csums included)
456 } __attribute__ ((__packed__
));
458 struct btrfs_csum_item
{
460 } __attribute__ ((__packed__
));
462 /* different types of block groups (and chunks) */
463 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
464 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
465 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
466 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
467 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
468 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
469 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
472 struct btrfs_block_group_item
{
474 __le64 chunk_objectid
;
476 } __attribute__ ((__packed__
));
478 struct btrfs_space_info
{
485 struct list_head list
;
488 struct btrfs_block_group_cache
{
489 struct btrfs_key key
;
490 struct btrfs_block_group_item item
;
491 struct btrfs_space_info
*space_info
;
500 struct btrfs_fs_devices
;
501 struct btrfs_fs_info
{
502 u8 fsid
[BTRFS_FSID_SIZE
];
503 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
504 struct btrfs_root
*extent_root
;
505 struct btrfs_root
*tree_root
;
506 struct btrfs_root
*chunk_root
;
507 struct btrfs_root
*dev_root
;
508 struct radix_tree_root fs_roots_radix
;
510 struct extent_io_tree free_space_cache
;
511 struct extent_io_tree block_group_cache
;
512 struct extent_io_tree pinned_extents
;
513 struct extent_io_tree pending_del
;
514 struct extent_io_tree extent_ins
;
516 /* logical->physical extent mapping */
517 struct btrfs_mapping_tree mapping_tree
;
520 u64 last_trans_committed
;
521 unsigned long mount_opt
;
525 struct btrfs_transaction
*running_transaction
;
526 wait_queue_head_t transaction_throttle
;
527 wait_queue_head_t transaction_wait
;
528 struct btrfs_super_block super_copy
;
529 struct btrfs_super_block super_for_commit
;
530 struct block_device
*__bdev
;
531 struct super_block
*sb
;
532 struct inode
*btree_inode
;
533 struct backing_dev_info bdi
;
534 spinlock_t hash_lock
;
535 struct mutex trans_mutex
;
536 struct mutex transaction_kthread_mutex
;
537 struct mutex cleaner_mutex
;
538 struct mutex alloc_mutex
;
539 struct mutex chunk_mutex
;
540 struct mutex drop_mutex
;
541 struct mutex volume_mutex
;
542 struct list_head trans_list
;
543 struct list_head hashers
;
544 struct list_head dead_roots
;
545 atomic_t nr_async_submits
;
548 * this is used by the balancing code to wait for all the pending
551 spinlock_t ordered_extent_lock
;
552 struct list_head ordered_extents
;
555 * there is a pool of worker threads for checksumming during writes
556 * and a pool for checksumming after reads. This is because readers
557 * can run with FS locks held, and the writers may be waiting for
558 * those locks. We don't want ordering in the pending list to cause
559 * deadlocks, and so the two are serviced separately.
561 * A third pool does submit_bio to avoid deadlocking with the other
564 struct btrfs_workers workers
;
565 struct btrfs_workers endio_workers
;
566 struct btrfs_workers endio_write_workers
;
567 struct btrfs_workers submit_workers
;
569 * fixup workers take dirty pages that didn't properly go through
570 * the cow mechanism and make them safe to write. It happens
571 * for the sys_munmap function call path
573 struct btrfs_workers fixup_workers
;
574 struct task_struct
*transaction_kthread
;
575 struct task_struct
*cleaner_kthread
;
576 int thread_pool_size
;
578 struct kobject super_kobj
;
579 struct completion kobj_unregister
;
583 atomic_t throttle_gen
;
586 struct list_head dirty_cowonly_roots
;
588 struct btrfs_fs_devices
*fs_devices
;
589 struct list_head space_info
;
590 spinlock_t delalloc_lock
;
591 spinlock_t new_trans_lock
;
596 spinlock_t ref_cache_lock
;
597 u64 total_ref_cache_size
;
599 u64 avail_data_alloc_bits
;
600 u64 avail_metadata_alloc_bits
;
601 u64 avail_system_alloc_bits
;
602 u64 data_alloc_profile
;
603 u64 metadata_alloc_profile
;
604 u64 system_alloc_profile
;
609 struct btrfs_leaf_ref_tree
{
611 struct btrfs_leaf_ref
*last
;
612 struct list_head list
;
617 * in ram representation of the tree. extent_root is used for all allocations
618 * and for the extent tree extent_root root.
620 struct btrfs_dirty_root
;
622 struct extent_buffer
*node
;
624 /* the node lock is held while changing the node pointer */
625 spinlock_t node_lock
;
627 struct extent_buffer
*commit_root
;
628 struct btrfs_leaf_ref_tree
*ref_tree
;
629 struct btrfs_leaf_ref_tree ref_tree_struct
;
630 struct btrfs_dirty_root
*dirty_root
;
632 struct btrfs_root_item root_item
;
633 struct btrfs_key root_key
;
634 struct btrfs_fs_info
*fs_info
;
636 struct kobject root_kobj
;
637 struct completion kobj_unregister
;
638 struct mutex objectid_mutex
;
642 /* data allocations are done in sectorsize units */
645 /* node allocations are done in nodesize units */
648 /* leaf allocations are done in leafsize units */
655 u64 last_inode_alloc
;
658 u64 defrag_trans_start
;
659 struct btrfs_key defrag_progress
;
660 struct btrfs_key defrag_max
;
666 /* the dirty list is only used by non-reference counted roots */
667 struct list_head dirty_list
;
669 spinlock_t list_lock
;
670 struct list_head dead_list
;
671 struct list_head orphan_list
;
676 * inode items have the data typically returned from stat and store other
677 * info about object characteristics. There is one for every file and dir in
680 #define BTRFS_INODE_ITEM_KEY 1
681 #define BTRFS_INODE_REF_KEY 2
682 #define BTRFS_XATTR_ITEM_KEY 8
683 #define BTRFS_ORPHAN_ITEM_KEY 9
684 /* reserve 2-15 close to the inode for later flexibility */
687 * dir items are the name -> inode pointers in a directory. There is one
688 * for every name in a directory.
690 #define BTRFS_DIR_ITEM_KEY 16
691 #define BTRFS_DIR_INDEX_KEY 17
693 * extent data is for file data
695 #define BTRFS_EXTENT_DATA_KEY 18
697 * csum items have the checksums for data in the extents
699 #define BTRFS_CSUM_ITEM_KEY 19
701 /* reserve 20-31 for other file stuff */
704 * root items point to tree roots. There are typically in the root
705 * tree used by the super block to find all the other trees
707 #define BTRFS_ROOT_ITEM_KEY 32
709 * extent items are in the extent map tree. These record which blocks
710 * are used, and how many references there are to each block
712 #define BTRFS_EXTENT_ITEM_KEY 33
713 #define BTRFS_EXTENT_REF_KEY 34
716 * block groups give us hints into the extent allocation trees. Which
717 * blocks are free etc etc
719 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
721 #define BTRFS_DEV_EXTENT_KEY 75
722 #define BTRFS_DEV_ITEM_KEY 76
723 #define BTRFS_CHUNK_ITEM_KEY 77
726 * string items are for debugging. They just store a short string of
729 #define BTRFS_STRING_ITEM_KEY 253
731 #define BTRFS_MOUNT_NODATASUM (1 << 0)
732 #define BTRFS_MOUNT_NODATACOW (1 << 1)
733 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
734 #define BTRFS_MOUNT_SSD (1 << 3)
735 #define BTRFS_MOUNT_DEGRADED (1 << 4)
737 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
738 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
739 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
744 #define BTRFS_INODE_NODATASUM (1 << 0)
745 #define BTRFS_INODE_NODATACOW (1 << 1)
746 #define BTRFS_INODE_READONLY (1 << 2)
747 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
749 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
751 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
753 /* some macros to generate set/get funcs for the struct fields. This
754 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
757 #define le8_to_cpu(v) (v)
758 #define cpu_to_le8(v) (v)
761 #define read_eb_member(eb, ptr, type, member, result) ( \
762 read_extent_buffer(eb, (char *)(result), \
763 ((unsigned long)(ptr)) + \
764 offsetof(type, member), \
765 sizeof(((type *)0)->member)))
767 #define write_eb_member(eb, ptr, type, member, result) ( \
768 write_extent_buffer(eb, (char *)(result), \
769 ((unsigned long)(ptr)) + \
770 offsetof(type, member), \
771 sizeof(((type *)0)->member)))
773 #ifndef BTRFS_SETGET_FUNCS
774 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
775 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
776 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
779 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
780 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
782 type *p = kmap_atomic(eb->first_page, KM_USER0); \
783 u##bits res = le##bits##_to_cpu(p->member); \
784 kunmap_atomic(p, KM_USER0); \
787 static inline void btrfs_set_##name(struct extent_buffer *eb, \
790 type *p = kmap_atomic(eb->first_page, KM_USER0); \
791 p->member = cpu_to_le##bits(val); \
792 kunmap_atomic(p, KM_USER0); \
795 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
796 static inline u##bits btrfs_##name(type *s) \
798 return le##bits##_to_cpu(s->member); \
800 static inline void btrfs_set_##name(type *s, u##bits val) \
802 s->member = cpu_to_le##bits(val); \
805 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
806 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
807 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
808 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
809 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
810 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
811 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
812 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
813 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
814 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
816 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
817 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
819 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
821 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
823 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
825 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
827 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
828 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
830 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
832 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
835 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
837 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
840 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
841 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
842 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
843 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
844 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
845 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
846 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
847 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
848 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
849 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
850 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
852 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
854 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
857 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
858 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
859 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
861 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
863 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
865 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
867 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
868 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
870 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
872 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
873 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
875 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
878 unsigned long offset
= (unsigned long)c
;
879 offset
+= offsetof(struct btrfs_chunk
, stripe
);
880 offset
+= nr
* sizeof(struct btrfs_stripe
);
881 return (struct btrfs_stripe
*)offset
;
884 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
886 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
889 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
890 struct btrfs_chunk
*c
, int nr
)
892 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
895 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
896 struct btrfs_chunk
*c
, int nr
,
899 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
902 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
903 struct btrfs_chunk
*c
, int nr
)
905 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
908 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
909 struct btrfs_chunk
*c
, int nr
,
912 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
915 /* struct btrfs_block_group_item */
916 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
918 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
920 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
921 struct btrfs_block_group_item
, chunk_objectid
, 64);
923 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
924 struct btrfs_block_group_item
, chunk_objectid
, 64);
925 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
926 struct btrfs_block_group_item
, flags
, 64);
927 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
928 struct btrfs_block_group_item
, flags
, 64);
930 /* struct btrfs_inode_ref */
931 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
932 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
934 /* struct btrfs_inode_item */
935 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
936 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
937 BTRFS_SETGET_FUNCS(inode_nblocks
, struct btrfs_inode_item
, nblocks
, 64);
938 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
939 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
940 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
941 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
942 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
943 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
944 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
945 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
948 static inline struct btrfs_timespec
*
949 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
951 unsigned long ptr
= (unsigned long)inode_item
;
952 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
953 return (struct btrfs_timespec
*)ptr
;
956 static inline struct btrfs_timespec
*
957 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
959 unsigned long ptr
= (unsigned long)inode_item
;
960 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
961 return (struct btrfs_timespec
*)ptr
;
964 static inline struct btrfs_timespec
*
965 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
967 unsigned long ptr
= (unsigned long)inode_item
;
968 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
969 return (struct btrfs_timespec
*)ptr
;
972 static inline struct btrfs_timespec
*
973 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
975 unsigned long ptr
= (unsigned long)inode_item
;
976 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
977 return (struct btrfs_timespec
*)ptr
;
980 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
981 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
983 /* struct btrfs_extent_item */
984 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
986 /* struct btrfs_dev_extent */
987 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
989 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
991 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
993 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
995 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
997 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
998 return (u8
*)((unsigned long)dev
+ ptr
);
1001 /* struct btrfs_extent_ref */
1002 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1003 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1004 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1005 BTRFS_SETGET_FUNCS(ref_offset
, struct btrfs_extent_ref
, offset
, 64);
1007 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1008 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1010 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1012 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset
, struct btrfs_extent_ref
, offset
, 64);
1014 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1017 /* struct btrfs_node */
1018 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1019 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1021 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1024 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1025 sizeof(struct btrfs_key_ptr
) * nr
;
1026 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1029 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1033 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1034 sizeof(struct btrfs_key_ptr
) * nr
;
1035 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1038 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1041 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1042 sizeof(struct btrfs_key_ptr
) * nr
;
1043 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1046 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1050 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1051 sizeof(struct btrfs_key_ptr
) * nr
;
1052 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1055 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1057 return offsetof(struct btrfs_node
, ptrs
) +
1058 sizeof(struct btrfs_key_ptr
) * nr
;
1061 void btrfs_node_key(struct extent_buffer
*eb
,
1062 struct btrfs_disk_key
*disk_key
, int nr
);
1064 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1065 struct btrfs_disk_key
*disk_key
, int nr
)
1068 ptr
= btrfs_node_key_ptr_offset(nr
);
1069 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1070 struct btrfs_key_ptr
, key
, disk_key
);
1073 /* struct btrfs_item */
1074 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1075 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1077 static inline unsigned long btrfs_item_nr_offset(int nr
)
1079 return offsetof(struct btrfs_leaf
, items
) +
1080 sizeof(struct btrfs_item
) * nr
;
1083 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1086 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1089 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1090 struct btrfs_item
*item
)
1092 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1095 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1097 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1100 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1102 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1105 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1107 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1110 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1111 struct btrfs_disk_key
*disk_key
, int nr
)
1113 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1114 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1117 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1118 struct btrfs_disk_key
*disk_key
, int nr
)
1120 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1121 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1124 /* struct btrfs_dir_item */
1125 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1126 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1127 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1129 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1130 struct btrfs_dir_item
*item
,
1131 struct btrfs_disk_key
*key
)
1133 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1136 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1137 struct btrfs_dir_item
*item
,
1138 struct btrfs_disk_key
*key
)
1140 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1143 /* struct btrfs_disk_key */
1144 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1146 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1147 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1149 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1150 struct btrfs_disk_key
*disk
)
1152 cpu
->offset
= le64_to_cpu(disk
->offset
);
1153 cpu
->type
= disk
->type
;
1154 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1157 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1158 struct btrfs_key
*cpu
)
1160 disk
->offset
= cpu_to_le64(cpu
->offset
);
1161 disk
->type
= cpu
->type
;
1162 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1165 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1166 struct btrfs_key
*key
, int nr
)
1168 struct btrfs_disk_key disk_key
;
1169 btrfs_node_key(eb
, &disk_key
, nr
);
1170 btrfs_disk_key_to_cpu(key
, &disk_key
);
1173 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1174 struct btrfs_key
*key
, int nr
)
1176 struct btrfs_disk_key disk_key
;
1177 btrfs_item_key(eb
, &disk_key
, nr
);
1178 btrfs_disk_key_to_cpu(key
, &disk_key
);
1181 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1182 struct btrfs_dir_item
*item
,
1183 struct btrfs_key
*key
)
1185 struct btrfs_disk_key disk_key
;
1186 btrfs_dir_item_key(eb
, item
, &disk_key
);
1187 btrfs_disk_key_to_cpu(key
, &disk_key
);
1191 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1196 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1201 /* struct btrfs_header */
1202 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1203 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1205 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1206 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1207 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1208 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1210 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1212 return (btrfs_header_flags(eb
) & flag
) == flag
;
1215 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1217 u64 flags
= btrfs_header_flags(eb
);
1218 btrfs_set_header_flags(eb
, flags
| flag
);
1219 return (flags
& flag
) == flag
;
1222 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1224 u64 flags
= btrfs_header_flags(eb
);
1225 btrfs_set_header_flags(eb
, flags
& ~flag
);
1226 return (flags
& flag
) == flag
;
1229 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1231 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1235 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1237 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1241 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1243 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1247 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1249 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1253 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1258 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1263 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1268 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1270 return (btrfs_header_level(eb
) == 0);
1273 /* struct btrfs_root_item */
1274 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1275 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1276 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1278 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1279 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1280 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1281 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1282 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1283 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1284 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1286 /* struct btrfs_super_block */
1287 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1288 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1289 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1291 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1292 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1293 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1294 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1296 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1298 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1299 chunk_root_level
, 64);
1300 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1302 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1304 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1306 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1308 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1310 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1312 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1313 root_dir_objectid
, 64);
1314 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1317 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1319 return offsetof(struct btrfs_leaf
, items
);
1322 /* struct btrfs_file_extent_item */
1323 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1325 static inline unsigned long btrfs_file_extent_inline_start(struct
1326 btrfs_file_extent_item
*e
)
1328 unsigned long offset
= (unsigned long)e
;
1329 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1333 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1335 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1338 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1339 struct btrfs_item
*e
)
1341 unsigned long offset
;
1342 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1343 return btrfs_item_size(eb
, e
) - offset
;
1346 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1348 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1350 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1351 disk_num_bytes
, 64);
1352 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1354 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1357 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1359 return sb
->s_fs_info
;
1362 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1363 const char *name
, int len
)
1365 /* if we already have a name just free it */
1369 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1373 memcpy(root
->name
, name
, len
);
1374 root
->name
[len
] ='\0';
1379 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1381 return root
->leafsize
;
1382 return root
->nodesize
;
1385 /* helper function to cast into the data area of the leaf. */
1386 #define btrfs_item_ptr(leaf, slot, type) \
1387 ((type *)(btrfs_leaf_data(leaf) + \
1388 btrfs_item_offset_nr(leaf, slot)))
1390 #define btrfs_item_ptr_offset(leaf, slot) \
1391 ((unsigned long)(btrfs_leaf_data(leaf) + \
1392 btrfs_item_offset_nr(leaf, slot)))
1394 static inline struct dentry
*fdentry(struct file
*file
) {
1395 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1396 return file
->f_dentry
;
1398 return file
->f_path
.dentry
;
1403 int btrfs_cross_ref_exists(struct btrfs_root
*root
,
1404 struct btrfs_key
*key
, u64 bytenr
);
1405 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1406 struct btrfs_root
*root
);
1407 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1408 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1409 btrfs_fs_info
*info
,
1411 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1412 struct btrfs_block_group_cache
1413 *hint
, u64 search_start
,
1414 int data
, int owner
);
1415 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1416 struct btrfs_root
*root
,
1424 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1425 struct btrfs_root
*root
,
1426 u64 bytenr
, u32 blocksize
);
1427 int btrfs_shrink_extent_tree(struct btrfs_root
*root
, u64 new_size
);
1428 int btrfs_insert_extent_backref(struct btrfs_trans_handle
*trans
,
1429 struct btrfs_root
*root
,
1430 struct btrfs_path
*path
, u64 bytenr
,
1431 u64 root_objectid
, u64 ref_generation
,
1432 u64 owner
, u64 owner_offset
);
1433 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1434 struct btrfs_root
*root
,
1435 u64 num_bytes
, u64 min_bytes
,
1436 u64 root_objectid
, u64 ref_generation
,
1437 u64 owner
, u64 owner_offset
,
1438 u64 empty_size
, u64 hint_byte
,
1439 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1440 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle
*trans
,
1441 struct btrfs_root
*root
,
1442 u64 root_objectid
, u64 ref_generation
,
1443 u64 owner
, u64 owner_offset
,
1444 struct btrfs_key
*ins
);
1445 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1446 struct btrfs_root
*root
,
1447 u64 num_bytes
, u64 min_alloc_size
,
1448 u64 empty_size
, u64 hint_byte
,
1449 u64 search_end
, struct btrfs_key
*ins
,
1451 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1452 struct extent_buffer
*buf
, int cache_ref
);
1453 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1454 *root
, u64 bytenr
, u64 num_bytes
,
1455 u64 root_objectid
, u64 ref_generation
,
1456 u64 owner_objectid
, u64 owner_offset
, int pin
);
1457 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1458 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1459 struct btrfs_root
*root
,
1460 struct extent_io_tree
*unpin
);
1461 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1462 struct btrfs_root
*root
,
1463 u64 bytenr
, u64 num_bytes
,
1464 u64 root_objectid
, u64 ref_generation
,
1465 u64 owner
, u64 owner_offset
);
1466 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1467 struct btrfs_root
*root
);
1468 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1469 int btrfs_read_block_groups(struct btrfs_root
*root
);
1470 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1471 struct btrfs_root
*root
, u64 bytes_used
,
1472 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1475 int btrfs_previous_item(struct btrfs_root
*root
,
1476 struct btrfs_path
*path
, u64 min_objectid
,
1479 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1480 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1481 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1482 struct btrfs_key
*key
, int lowest_level
,
1483 int cache_only
, u64 min_trans
);
1484 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1485 struct btrfs_path
*path
, int cache_only
,
1488 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1489 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1490 struct extent_buffer
*parent
, int parent_slot
,
1491 struct extent_buffer
**cow_ret
, u64 prealloc_dest
);
1492 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1493 struct btrfs_root
*root
,
1494 struct extent_buffer
*buf
,
1495 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1496 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1497 *root
, struct btrfs_path
*path
, u32 data_size
);
1498 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1499 struct btrfs_root
*root
,
1500 struct btrfs_path
*path
,
1501 u32 new_size
, int from_end
);
1502 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1503 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1505 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1506 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1507 int start_slot
, int cache_only
, u64
*last_ret
,
1508 struct btrfs_key
*progress
);
1509 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1510 struct btrfs_path
*btrfs_alloc_path(void);
1511 void btrfs_free_path(struct btrfs_path
*p
);
1512 void btrfs_init_path(struct btrfs_path
*p
);
1513 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1514 struct btrfs_path
*path
, int slot
, int nr
);
1516 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1517 struct btrfs_root
*root
,
1518 struct btrfs_path
*path
)
1520 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1523 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1524 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1525 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1526 struct btrfs_root
*root
,
1527 struct btrfs_path
*path
,
1528 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1530 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1531 struct btrfs_root
*root
,
1532 struct btrfs_path
*path
,
1533 struct btrfs_key
*key
,
1536 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1539 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1540 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1541 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1542 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1545 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1546 struct btrfs_key
*key
);
1547 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1548 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1550 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1551 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1553 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1554 btrfs_root_item
*item
, struct btrfs_key
*key
);
1555 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
1556 u64
*found_objectid
);
1557 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1558 struct btrfs_root
*latest_root
);
1560 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1561 *root
, const char *name
, int name_len
, u64 dir
,
1562 struct btrfs_key
*location
, u8 type
, u64 index
);
1563 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1564 struct btrfs_root
*root
,
1565 struct btrfs_path
*path
, u64 dir
,
1566 const char *name
, int name_len
,
1568 struct btrfs_dir_item
*
1569 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1570 struct btrfs_root
*root
,
1571 struct btrfs_path
*path
, u64 dir
,
1572 u64 objectid
, const char *name
, int name_len
,
1574 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1575 struct btrfs_path
*path
,
1576 const char *name
, int name_len
);
1577 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1578 struct btrfs_root
*root
,
1579 struct btrfs_path
*path
,
1580 struct btrfs_dir_item
*di
);
1581 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1582 struct btrfs_root
*root
, const char *name
,
1583 u16 name_len
, const void *data
, u16 data_len
,
1585 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1586 struct btrfs_root
*root
,
1587 struct btrfs_path
*path
, u64 dir
,
1588 const char *name
, u16 name_len
,
1592 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
1593 struct btrfs_root
*root
, u64 offset
);
1594 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
1595 struct btrfs_root
*root
, u64 offset
);
1598 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1599 struct btrfs_root
*fs_root
,
1600 u64 dirid
, u64
*objectid
);
1601 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1604 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1605 struct btrfs_root
*root
,
1606 const char *name
, int name_len
,
1607 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1608 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1609 struct btrfs_root
*root
,
1610 const char *name
, int name_len
,
1611 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
1612 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1613 struct btrfs_root
*root
,
1614 struct btrfs_path
*path
, u64 objectid
);
1615 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1616 *root
, struct btrfs_path
*path
,
1617 struct btrfs_key
*location
, int mod
);
1620 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
1622 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1623 struct btrfs_root
*root
,
1624 u64 objectid
, u64 pos
, u64 disk_offset
,
1626 u64 num_bytes
, u64 offset
);
1627 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1628 struct btrfs_root
*root
,
1629 struct btrfs_path
*path
, u64 objectid
,
1630 u64 bytenr
, int mod
);
1631 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1632 struct btrfs_root
*root
, struct inode
*inode
,
1633 struct btrfs_ordered_sum
*sums
);
1634 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
1636 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1637 struct btrfs_root
*root
,
1638 struct btrfs_path
*path
,
1639 u64 objectid
, u64 offset
,
1641 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1642 struct btrfs_root
*root
, struct btrfs_path
*path
,
1646 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1647 #ifdef ClearPageFsMisc
1648 #define ClearPageChecked ClearPageFsMisc
1649 #define SetPageChecked SetPageFsMisc
1650 #define PageChecked PageFsMisc
1653 int btrfs_writepages(struct address_space
*mapping
,
1654 struct writeback_control
*wbc
);
1655 int btrfs_create_subvol_root(struct btrfs_root
*new_root
,
1656 struct btrfs_trans_handle
*trans
, u64 new_dirid
,
1657 struct btrfs_block_group_cache
*block_group
);
1659 void btrfs_invalidate_dcache_root(struct btrfs_root
*root
, char *name
,
1662 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
1663 size_t size
, struct bio
*bio
);
1665 static inline void dec_i_blocks(struct inode
*inode
, u64 dec
)
1668 if (dec
<= inode
->i_blocks
)
1669 inode
->i_blocks
-= dec
;
1671 inode
->i_blocks
= 0;
1674 unsigned long btrfs_force_ra(struct address_space
*mapping
,
1675 struct file_ra_state
*ra
, struct file
*file
,
1676 pgoff_t offset
, pgoff_t last_index
);
1677 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
1679 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
1680 int btrfs_readpage(struct file
*file
, struct page
*page
);
1681 void btrfs_delete_inode(struct inode
*inode
);
1682 void btrfs_put_inode(struct inode
*inode
);
1683 void btrfs_read_locked_inode(struct inode
*inode
);
1684 int btrfs_write_inode(struct inode
*inode
, int wait
);
1685 void btrfs_dirty_inode(struct inode
*inode
);
1686 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
1687 void btrfs_destroy_inode(struct inode
*inode
);
1688 int btrfs_init_cachep(void);
1689 void btrfs_destroy_cachep(void);
1690 long btrfs_ioctl_trans_end(struct file
*file
);
1691 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
1692 struct btrfs_root
*root
);
1693 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
1695 int btrfs_commit_write(struct file
*file
, struct page
*page
,
1696 unsigned from
, unsigned to
);
1697 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
1698 size_t page_offset
, u64 start
, u64 end
,
1700 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
1701 struct btrfs_root
*root
,
1702 struct inode
*inode
);
1705 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
1708 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
);
1709 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
1710 extern struct file_operations btrfs_file_operations
;
1711 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
1712 struct btrfs_root
*root
, struct inode
*inode
,
1713 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
1714 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
1717 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
1718 struct btrfs_root
*root
, int cache_only
);
1721 int btrfs_init_sysfs(void);
1722 void btrfs_exit_sysfs(void);
1723 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
1724 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
1725 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
1726 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
1729 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
1732 u64
btrfs_parse_size(char *str
);
1733 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
1734 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
1737 int btrfs_check_acl(struct inode
*inode
, int mask
);
1738 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
1739 int btrfs_acl_chmod(struct inode
*inode
);