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.
23 #include "kerncompat.h"
24 #include "radix-tree.h"
25 #include "extent-cache.h"
26 #include "extent_io.h"
29 struct btrfs_trans_handle
;
30 #define BTRFS_MAGIC "_BFRfS_M"
32 #define BTRFS_MAX_LEVEL 8
34 /* holds pointers to all of the tree roots */
35 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
37 /* stores information about which extents are in use, and reference counts */
38 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
41 * chunk tree stores translations from logical -> physical block numbering
42 * the super block points to the chunk tree
44 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
47 * stores information about which areas of a given device are in use.
48 * one per device. The tree of tree roots points to the device tree
50 #define BTRFS_DEV_TREE_OBJECTID 4ULL
52 /* one per subvolume, storing files and directories */
53 #define BTRFS_FS_TREE_OBJECTID 5ULL
55 /* directory objectid inside the root tree */
56 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
58 /* oprhan objectid for tracking unlinked/truncated files */
59 #define BTRFS_ORPHAN_OBJECTID -5ULL
61 /* does write ahead logging to speed up fsyncs */
62 #define BTRFS_TREE_LOG_OBJECTID -6ULL
63 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
66 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
67 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
69 /* dummy objectid represents multiple objectids */
70 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
73 * All files have objectids in this range.
75 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
76 #define BTRFS_LAST_FREE_OBJECTID -256ULL
77 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
82 * the device items go into the chunk tree. The key is in the form
83 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
85 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
88 * we can actually store much bigger names, but lets not confuse the rest
91 #define BTRFS_NAME_LEN 255
93 /* 32 bytes in various csum fields */
94 #define BTRFS_CSUM_SIZE 32
95 /* four bytes for CRC32 */
96 #define BTRFS_CRC32_SIZE 4
97 #define BTRFS_EMPTY_DIR_SIZE 0
99 #define BTRFS_FT_UNKNOWN 0
100 #define BTRFS_FT_REG_FILE 1
101 #define BTRFS_FT_DIR 2
102 #define BTRFS_FT_CHRDEV 3
103 #define BTRFS_FT_BLKDEV 4
104 #define BTRFS_FT_FIFO 5
105 #define BTRFS_FT_SOCK 6
106 #define BTRFS_FT_SYMLINK 7
107 #define BTRFS_FT_XATTR 8
108 #define BTRFS_FT_MAX 9
111 * the key defines the order in the tree, and so it also defines (optimal)
112 * block layout. objectid corresonds to the inode number. The flags
113 * tells us things about the object, and is a kind of stream selector.
114 * so for a given inode, keys with flags of 1 might refer to the inode
115 * data, flags of 2 may point to file data in the btree and flags == 3
116 * may point to extents.
118 * offset is the starting byte offset for this key in the stream.
120 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
121 * in cpu native order. Otherwise they are identical and their sizes
122 * should be the same (ie both packed)
124 struct btrfs_disk_key
{
128 } __attribute__ ((__packed__
));
134 } __attribute__ ((__packed__
));
136 struct btrfs_mapping_tree
{
137 struct cache_tree cache_tree
;
140 #define BTRFS_UUID_SIZE 16
141 struct btrfs_dev_item
{
142 /* the internal btrfs device id */
145 /* size of the device */
151 /* optimal io alignment for this device */
154 /* optimal io width for this device */
157 /* minimal io size for this device */
160 /* type and info about this device */
163 /* expected generation for this device */
166 /* grouping information for allocation decisions */
169 /* seek speed 0-100 where 100 is fastest */
172 /* bandwidth 0-100 where 100 is fastest */
175 /* btrfs generated uuid for this device */
176 u8 uuid
[BTRFS_UUID_SIZE
];
178 /* uuid of FS who owns this device */
179 u8 fsid
[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))
255 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
256 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
259 * this is a very generous portion of the super block, giving us
260 * room to translate 14 chunks with 3 stripes each.
262 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
263 #define BTRFS_LABEL_SIZE 256
266 * the super block basically lists the main trees of the FS
267 * it currently lacks any block count etc etc
269 struct btrfs_super_block
{
270 u8 csum
[BTRFS_CSUM_SIZE
];
271 /* the first 3 fields must match struct btrfs_header */
272 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
273 __le64 bytenr
; /* this block number */
276 /* allowed to be different from the btrfs_header from here own down */
284 __le64 root_dir_objectid
;
290 __le32 sys_chunk_array_size
;
291 __le64 chunk_root_generation
;
295 struct btrfs_dev_item dev_item
;
296 char label
[BTRFS_LABEL_SIZE
];
297 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
298 } __attribute__ ((__packed__
));
301 * A leaf is full of items. offset and size tell us where to find
302 * the item in the leaf (relative to the start of the data area)
305 struct btrfs_disk_key key
;
308 } __attribute__ ((__packed__
));
311 * leaves have an item area and a data area:
312 * [item0, item1....itemN] [free space] [dataN...data1, data0]
314 * The data is separate from the items to get the keys closer together
318 struct btrfs_header header
;
319 struct btrfs_item items
[];
320 } __attribute__ ((__packed__
));
323 * all non-leaf blocks are nodes, they hold only keys and pointers to
326 struct btrfs_key_ptr
{
327 struct btrfs_disk_key key
;
330 } __attribute__ ((__packed__
));
333 struct btrfs_header header
;
334 struct btrfs_key_ptr ptrs
[];
335 } __attribute__ ((__packed__
));
338 * btrfs_paths remember the path taken from the root down to the leaf.
339 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
340 * to any other levels that are present.
342 * The slots array records the index of the item or block pointer
343 * used while walking the tree.
346 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
347 int slots
[BTRFS_MAX_LEVEL
];
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 BTRFS_COMPRESS_NONE
= 0,
392 BTRFS_COMPRESS_ZLIB
= 1,
393 BTRFS_COMPRESS_LAST
= 2,
394 } btrfs_compression_type
;
396 /* we don't understand any encryption methods right now */
398 BTRFS_ENCRYPTION_NONE
= 0,
399 BTRFS_ENCRYPTION_LAST
= 1,
400 } btrfs_encryption_type
;
402 struct btrfs_inode_item
{
403 /* nfs style generation number */
405 /* transid that last touched this inode */
418 struct btrfs_timespec atime
;
419 struct btrfs_timespec ctime
;
420 struct btrfs_timespec mtime
;
421 struct btrfs_timespec otime
;
422 } __attribute__ ((__packed__
));
424 struct btrfs_dir_item
{
425 struct btrfs_disk_key location
;
430 } __attribute__ ((__packed__
));
432 struct btrfs_root_item
{
433 struct btrfs_inode_item inode
;
439 __le64 last_snapshot
;
442 struct btrfs_disk_key drop_progress
;
445 } __attribute__ ((__packed__
));
448 * this is used for both forward and backward root refs
450 struct btrfs_root_ref
{
454 } __attribute__ ((__packed__
));
456 #define BTRFS_FILE_EXTENT_INLINE 0
457 #define BTRFS_FILE_EXTENT_REG 1
458 #define BTRFS_FILE_EXTENT_PREALLOC 2
460 struct btrfs_file_extent_item
{
462 * transaction id that created this extent
466 * max number of bytes to hold this extent in ram
467 * when we split a compressed extent we can't know how big
468 * each of the resulting pieces will be. So, this is
469 * an upper limit on the size of the extent in ram instead of
475 * 32 bits for the various ways we might encode the data,
476 * including compression and encryption. If any of these
477 * are set to something a given disk format doesn't understand
478 * it is treated like an incompat flag for reading and writing,
483 __le16 other_encoding
; /* spare for later use */
485 /* are we inline data or a real extent? */
489 * disk space consumed by the extent, checksum blocks are included
493 __le64 disk_num_bytes
;
495 * the logical offset in file blocks (no csums)
496 * this extent record is for. This allows a file extent to point
497 * into the middle of an existing extent on disk, sharing it
498 * between two snapshots (useful if some bytes in the middle of the
499 * extent have changed
503 * the logical number of file blocks (no csums included)
507 } __attribute__ ((__packed__
));
509 struct btrfs_csum_item
{
511 } __attribute__ ((__packed__
));
513 /* tag for the radix tree of block groups in ram */
514 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
515 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
516 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
517 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
518 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
519 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
520 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
522 struct btrfs_block_group_item
{
524 __le64 chunk_objectid
;
526 } __attribute__ ((__packed__
));
528 struct btrfs_space_info
{
534 struct list_head list
;
537 struct btrfs_block_group_cache
{
538 struct cache_extent cache
;
539 struct btrfs_key key
;
540 struct btrfs_block_group_item item
;
541 struct btrfs_space_info
*space_info
;
548 struct btrfs_extent_ops
{
549 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
550 u64 hint_byte
, struct btrfs_key
*ins
);
551 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
556 struct btrfs_fs_devices
;
557 struct btrfs_fs_info
{
558 u8 fsid
[BTRFS_FSID_SIZE
];
559 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
560 struct btrfs_root
*fs_root
;
561 struct btrfs_root
*extent_root
;
562 struct btrfs_root
*tree_root
;
563 struct btrfs_root
*chunk_root
;
564 struct btrfs_root
*dev_root
;
566 /* the log root tree is a directory of all the other log roots */
567 struct btrfs_root
*log_root_tree
;
569 struct extent_io_tree extent_cache
;
570 struct extent_io_tree free_space_cache
;
571 struct extent_io_tree block_group_cache
;
572 struct extent_io_tree pinned_extents
;
573 struct extent_io_tree pending_del
;
574 struct extent_io_tree extent_ins
;
576 /* logical->physical extent mapping */
577 struct btrfs_mapping_tree mapping_tree
;
580 u64 last_trans_committed
;
582 u64 avail_data_alloc_bits
;
583 u64 avail_metadata_alloc_bits
;
584 u64 avail_system_alloc_bits
;
585 u64 data_alloc_profile
;
586 u64 metadata_alloc_profile
;
587 u64 system_alloc_profile
;
590 struct btrfs_trans_handle
*running_transaction
;
591 struct btrfs_super_block super_copy
;
592 struct extent_buffer
*sb_buffer
;
593 struct mutex fs_mutex
;
596 struct btrfs_extent_ops
*extent_ops
;
597 struct list_head dirty_cowonly_roots
;
599 struct btrfs_fs_devices
*fs_devices
;
600 struct list_head space_info
;
606 * in ram representation of the tree. extent_root is used for all allocations
607 * and for the extent tree extent_root root.
610 struct extent_buffer
*node
;
611 struct extent_buffer
*commit_root
;
612 struct btrfs_root_item root_item
;
613 struct btrfs_key root_key
;
614 struct btrfs_fs_info
*fs_info
;
618 /* data allocations are done in sectorsize units */
621 /* node allocations are done in nodesize units */
624 /* leaf allocations are done in leafsize units */
627 /* leaf allocations are done in leafsize units */
636 u64 last_inode_alloc
;
638 /* the dirty list is only used by non-reference counted roots */
639 struct list_head dirty_list
;
643 * inode items have the data typically returned from stat and store other
644 * info about object characteristics. There is one for every file and dir in
647 #define BTRFS_INODE_ITEM_KEY 1
648 #define BTRFS_INODE_REF_KEY 12
649 #define BTRFS_XATTR_ITEM_KEY 24
650 #define BTRFS_ORPHAN_ITEM_KEY 48
652 #define BTRFS_DIR_LOG_ITEM_KEY 60
653 #define BTRFS_DIR_LOG_INDEX_KEY 72
655 * dir items are the name -> inode pointers in a directory. There is one
656 * for every name in a directory.
658 #define BTRFS_DIR_ITEM_KEY 84
659 #define BTRFS_DIR_INDEX_KEY 96
662 * extent data is for file data
664 #define BTRFS_EXTENT_DATA_KEY 108
667 * csum items have the checksums for data in the extents
669 #define BTRFS_CSUM_ITEM_KEY 120
672 * root items point to tree roots. There are typically in the root
673 * tree used by the super block to find all the other trees
675 #define BTRFS_ROOT_ITEM_KEY 132
678 * root backrefs tie subvols and snapshots to the directory entries that
681 #define BTRFS_ROOT_BACKREF_KEY 144
684 * root refs make a fast index for listing all of the snapshots and
685 * subvolumes referenced by a given root. They point directly to the
686 * directory item in the root that references the subvol
688 #define BTRFS_ROOT_REF_KEY 156
691 * extent items are in the extent map tree. These record which blocks
692 * are used, and how many references there are to each block
694 #define BTRFS_EXTENT_ITEM_KEY 168
695 #define BTRFS_EXTENT_REF_KEY 180
698 * block groups give us hints into the extent allocation trees. Which
699 * blocks are free etc etc
701 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
703 #define BTRFS_DEV_EXTENT_KEY 204
704 #define BTRFS_DEV_ITEM_KEY 216
705 #define BTRFS_CHUNK_ITEM_KEY 228
708 * string items are for debugging. They just store a short string of
711 #define BTRFS_STRING_ITEM_KEY 253
715 #define BTRFS_INODE_NODATASUM (1 << 0)
716 #define BTRFS_INODE_NODATACOW (1 << 1)
717 #define BTRFS_INODE_READONLY (1 << 2)
719 #define read_eb_member(eb, ptr, type, member, result) ( \
720 read_extent_buffer(eb, (char *)(result), \
721 ((unsigned long)(ptr)) + \
722 offsetof(type, member), \
723 sizeof(((type *)0)->member)))
725 #define write_eb_member(eb, ptr, type, member, result) ( \
726 write_extent_buffer(eb, (char *)(result), \
727 ((unsigned long)(ptr)) + \
728 offsetof(type, member), \
729 sizeof(((type *)0)->member)))
731 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
732 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
734 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
735 return le##bits##_to_cpu(h->member); \
737 static inline void btrfs_set_##name(struct extent_buffer *eb, \
740 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
741 h->member = cpu_to_le##bits(val); \
744 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
745 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
748 unsigned long offset = (unsigned long)s; \
749 type *p = (type *) (eb->data + offset); \
750 return le##bits##_to_cpu(p->member); \
752 static inline void btrfs_set_##name(struct extent_buffer *eb, \
753 type *s, u##bits val) \
755 unsigned long offset = (unsigned long)s; \
756 type *p = (type *) (eb->data + offset); \
757 p->member = cpu_to_le##bits(val); \
760 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
761 static inline u##bits btrfs_##name(type *s) \
763 return le##bits##_to_cpu(s->member); \
765 static inline void btrfs_set_##name(type *s, u##bits val) \
767 s->member = cpu_to_le##bits(val); \
770 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
771 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
772 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
773 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
774 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
775 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
776 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
777 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
778 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
779 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
780 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
782 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
783 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
785 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
787 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
789 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
791 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
793 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
794 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
796 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
798 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
800 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
803 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
805 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
808 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
810 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
813 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
814 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
815 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
816 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
817 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
818 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
819 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
820 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
821 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
822 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
823 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
825 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
827 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
830 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
831 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
832 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
834 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
836 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
838 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
840 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
841 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
843 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
845 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
846 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
848 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
851 unsigned long offset
= (unsigned long)c
;
852 offset
+= offsetof(struct btrfs_chunk
, stripe
);
853 offset
+= nr
* sizeof(struct btrfs_stripe
);
854 return (struct btrfs_stripe
*)offset
;
857 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
859 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
862 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
863 struct btrfs_chunk
*c
, int nr
)
865 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
868 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
869 struct btrfs_chunk
*c
, int nr
,
872 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
875 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
876 struct btrfs_chunk
*c
, int nr
)
878 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
881 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
882 struct btrfs_chunk
*c
, int nr
,
885 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
888 /* struct btrfs_block_group_item */
889 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
891 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
893 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
894 struct btrfs_block_group_item
, chunk_objectid
, 64);
896 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
897 struct btrfs_block_group_item
, chunk_objectid
, 64);
898 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
899 struct btrfs_block_group_item
, flags
, 64);
900 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
901 struct btrfs_block_group_item
, flags
, 64);
903 /* struct btrfs_inode_ref */
904 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
905 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
907 /* struct btrfs_inode_item */
908 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
909 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
910 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
911 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
912 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
913 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
914 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
915 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
916 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
917 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
918 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
919 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
922 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
923 struct btrfs_inode_item
, generation
, 64);
924 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
925 struct btrfs_inode_item
, size
, 64);
926 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
927 struct btrfs_inode_item
, nbytes
, 64);
928 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
929 struct btrfs_inode_item
, block_group
, 64);
930 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
931 struct btrfs_inode_item
, nlink
, 32);
932 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
933 struct btrfs_inode_item
, uid
, 32);
934 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
935 struct btrfs_inode_item
, gid
, 32);
936 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
937 struct btrfs_inode_item
, mode
, 32);
938 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
939 struct btrfs_inode_item
, rdev
, 64);
940 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
941 struct btrfs_inode_item
, flags
, 16);
942 BTRFS_SETGET_STACK_FUNCS(stack_inode_compat_flags
,
943 struct btrfs_inode_item
, compat_flags
, 16);
945 static inline struct btrfs_timespec
*
946 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
948 unsigned long ptr
= (unsigned long)inode_item
;
949 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
950 return (struct btrfs_timespec
*)ptr
;
953 static inline struct btrfs_timespec
*
954 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
956 unsigned long ptr
= (unsigned long)inode_item
;
957 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
958 return (struct btrfs_timespec
*)ptr
;
961 static inline struct btrfs_timespec
*
962 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
964 unsigned long ptr
= (unsigned long)inode_item
;
965 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
966 return (struct btrfs_timespec
*)ptr
;
969 static inline struct btrfs_timespec
*
970 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
972 unsigned long ptr
= (unsigned long)inode_item
;
973 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
974 return (struct btrfs_timespec
*)ptr
;
977 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
978 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
979 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
981 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
984 /* struct btrfs_dev_extent */
985 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
987 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
989 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
991 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
993 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
995 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
996 return (u8
*)((unsigned long)dev
+ ptr
);
999 /* struct btrfs_extent_ref */
1000 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1001 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1002 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1003 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1005 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1006 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1008 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1010 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1013 /* struct btrfs_extent_item */
1014 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1015 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1018 /* struct btrfs_node */
1019 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1020 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1022 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1025 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1026 sizeof(struct btrfs_key_ptr
) * nr
;
1027 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1030 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1034 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1035 sizeof(struct btrfs_key_ptr
) * nr
;
1036 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1039 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1042 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1043 sizeof(struct btrfs_key_ptr
) * nr
;
1044 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1047 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1051 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1052 sizeof(struct btrfs_key_ptr
) * nr
;
1053 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1056 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1058 return offsetof(struct btrfs_node
, ptrs
) +
1059 sizeof(struct btrfs_key_ptr
) * nr
;
1062 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1063 struct btrfs_disk_key
*disk_key
, int nr
)
1066 ptr
= btrfs_node_key_ptr_offset(nr
);
1067 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1068 struct btrfs_key_ptr
, key
, disk_key
);
1071 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1072 struct btrfs_disk_key
*disk_key
, int nr
)
1075 ptr
= btrfs_node_key_ptr_offset(nr
);
1076 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1077 struct btrfs_key_ptr
, key
, disk_key
);
1080 /* struct btrfs_item */
1081 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1082 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1084 static inline unsigned long btrfs_item_nr_offset(int nr
)
1086 return offsetof(struct btrfs_leaf
, items
) +
1087 sizeof(struct btrfs_item
) * nr
;
1090 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1093 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1096 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1097 struct btrfs_item
*item
)
1099 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1102 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1104 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1107 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1109 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1112 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1114 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1117 static inline void btrfs_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 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1124 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1125 struct btrfs_disk_key
*disk_key
, int nr
)
1127 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1128 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1132 * struct btrfs_root_ref
1134 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1135 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1136 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1138 /* struct btrfs_dir_item */
1139 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1140 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1141 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1142 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1144 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1145 struct btrfs_dir_item
*item
,
1146 struct btrfs_disk_key
*key
)
1148 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1151 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1152 struct btrfs_dir_item
*item
,
1153 struct btrfs_disk_key
*key
)
1155 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1158 /* struct btrfs_disk_key */
1159 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1161 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1162 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1164 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1165 struct btrfs_disk_key
*disk
)
1167 cpu
->offset
= le64_to_cpu(disk
->offset
);
1168 cpu
->type
= disk
->type
;
1169 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1172 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1173 struct btrfs_key
*cpu
)
1175 disk
->offset
= cpu_to_le64(cpu
->offset
);
1176 disk
->type
= cpu
->type
;
1177 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1180 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1181 struct btrfs_key
*key
, int nr
)
1183 struct btrfs_disk_key disk_key
;
1184 btrfs_node_key(eb
, &disk_key
, nr
);
1185 btrfs_disk_key_to_cpu(key
, &disk_key
);
1188 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1189 struct btrfs_key
*key
, int nr
)
1191 struct btrfs_disk_key disk_key
;
1192 btrfs_item_key(eb
, &disk_key
, nr
);
1193 btrfs_disk_key_to_cpu(key
, &disk_key
);
1196 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1197 struct btrfs_dir_item
*item
,
1198 struct btrfs_key
*key
)
1200 struct btrfs_disk_key disk_key
;
1201 btrfs_dir_item_key(eb
, item
, &disk_key
);
1202 btrfs_disk_key_to_cpu(key
, &disk_key
);
1206 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1211 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1216 /* struct btrfs_header */
1217 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1218 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1220 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1221 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1222 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1223 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1225 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1227 return (btrfs_header_flags(eb
) & flag
) == flag
;
1230 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1232 u64 flags
= btrfs_header_flags(eb
);
1233 btrfs_set_header_flags(eb
, flags
| flag
);
1234 return (flags
& flag
) == flag
;
1237 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1239 u64 flags
= btrfs_header_flags(eb
);
1240 btrfs_set_header_flags(eb
, flags
& ~flag
);
1241 return (flags
& flag
) == flag
;
1244 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1246 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1250 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1252 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1256 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1258 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1262 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1264 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1268 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1273 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1278 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1283 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1285 return (btrfs_header_level(eb
) == 0);
1288 /* struct btrfs_root_item */
1289 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1291 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1292 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1293 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1295 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1297 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1298 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1299 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1300 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1301 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1302 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1303 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1304 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1308 /* struct btrfs_super_block */
1309 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1310 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1311 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1313 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1314 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1315 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1316 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1317 struct btrfs_super_block
, chunk_root_generation
, 64);
1318 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1320 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1322 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1323 chunk_root_level
, 8);
1324 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1326 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1328 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1330 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1332 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1334 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1336 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1338 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1340 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1341 root_dir_objectid
, 64);
1342 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1345 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1347 return offsetof(struct btrfs_leaf
, items
);
1350 /* struct btrfs_file_extent_item */
1351 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1353 static inline unsigned long btrfs_file_extent_inline_start(struct
1354 btrfs_file_extent_item
*e
)
1356 unsigned long offset
= (unsigned long)e
;
1357 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1361 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1363 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1366 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1368 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1370 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1371 disk_num_bytes
, 64);
1372 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1374 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1376 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1378 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1380 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1382 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1383 other_encoding
, 16);
1385 /* this returns the number of file bytes represented by the inline item.
1386 * If an item is compressed, this is the uncompressed size
1388 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1389 struct btrfs_file_extent_item
*e
)
1391 return btrfs_file_extent_ram_bytes(eb
, e
);
1395 * this returns the number of bytes used by the item on disk, minus the
1396 * size of any extent headers. If a file is compressed on disk, this is
1397 * the compressed size
1399 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1400 struct btrfs_item
*e
)
1402 unsigned long offset
;
1403 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1404 return btrfs_item_size(eb
, e
) - offset
;
1407 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1409 return root
->leafsize
;
1410 return root
->nodesize
;
1413 /* helper function to cast into the data area of the leaf. */
1414 #define btrfs_item_ptr(leaf, slot, type) \
1415 ((type *)(btrfs_leaf_data(leaf) + \
1416 btrfs_item_offset_nr(leaf, slot)))
1418 #define btrfs_item_ptr_offset(leaf, slot) \
1419 ((unsigned long)(btrfs_leaf_data(leaf) + \
1420 btrfs_item_offset_nr(leaf, slot)))
1423 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1424 struct btrfs_root
*root
);
1425 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1426 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1427 btrfs_fs_info
*info
,
1429 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1430 struct btrfs_block_group_cache
1431 *hint
, u64 search_start
,
1432 int data
, int owner
);
1433 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1434 struct btrfs_root
*root
,
1435 u32 blocksize
, u64 parent
,
1441 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1442 struct btrfs_root
*root
,
1443 u64 num_bytes
, u64 parent
,
1444 u64 root_objectid
, u64 ref_generation
,
1445 u64 owner
, u64 empty_size
, u64 hint_byte
,
1446 u64 search_end
, struct btrfs_key
*ins
, int data
);
1447 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1448 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1450 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1451 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1452 struct extent_buffer
*buf
, int start_slot
, int nr
);
1453 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1454 *root
, u64 bytenr
, u64 num_bytes
, u64 parent
,
1455 u64 root_objectid
, u64 ref_generation
,
1456 u64 owner_objectid
, int pin
);
1457 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1458 struct btrfs_root
*root
,
1459 struct extent_io_tree
*unpin
);
1460 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1461 struct btrfs_root
*root
,
1462 u64 bytenr
, u64 num_bytes
, u64 parent
,
1463 u64 root_objectid
, u64 ref_generation
,
1464 u64 owner_objectid
);
1465 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1466 struct btrfs_root
*root
, u64 bytenr
,
1467 u64 orig_parent
, u64 parent
,
1468 u64 root_objectid
, u64 ref_generation
,
1469 u64 owner_objectid
);
1470 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1471 struct btrfs_root
*root
);
1472 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1473 int btrfs_read_block_groups(struct btrfs_root
*root
);
1474 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1475 struct btrfs_root
*root
, u64 bytes_used
,
1476 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1478 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
1479 struct btrfs_root
*root
);
1480 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
1481 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
1482 int alloc
, int mark_free
);
1484 int btrfs_previous_item(struct btrfs_root
*root
,
1485 struct btrfs_path
*path
, u64 min_objectid
,
1487 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
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
);
1492 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1493 struct btrfs_root
*root
,
1494 struct extent_buffer
*buf
,
1495 struct extent_buffer
*parent
, int parent_slot
,
1496 struct extent_buffer
**cow_ret
,
1497 u64 search_start
, u64 empty_size
);
1498 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1499 struct btrfs_root
*root
,
1500 struct extent_buffer
*buf
,
1501 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1502 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1503 *root
, struct btrfs_path
*path
, u32 data_size
);
1504 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1505 struct btrfs_root
*root
,
1506 struct btrfs_path
*path
,
1507 u32 new_size
, int from_end
);
1508 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1509 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1511 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1512 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1513 int start_slot
, int cache_only
, u64
*last_ret
,
1514 struct btrfs_key
*progress
);
1515 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1516 struct btrfs_path
*btrfs_alloc_path(void);
1517 void btrfs_free_path(struct btrfs_path
*p
);
1518 void btrfs_init_path(struct btrfs_path
*p
);
1519 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1520 struct btrfs_path
*path
, int slot
, int nr
);
1522 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1523 struct btrfs_root
*root
,
1524 struct btrfs_path
*path
)
1526 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1529 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1530 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1531 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1532 struct btrfs_root
*root
,
1533 struct btrfs_path
*path
,
1534 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1536 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1537 struct btrfs_root
*root
,
1538 struct btrfs_path
*path
,
1539 struct btrfs_key
*key
,
1542 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1545 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1546 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1547 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1548 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1550 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1551 struct btrfs_root
*root
, struct btrfs_path
*path
,
1552 struct btrfs_key
*new_key
);
1555 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1556 struct btrfs_key
*key
);
1557 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1558 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1560 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1561 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1563 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1564 btrfs_root_item
*item
, struct btrfs_key
*key
);
1565 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1566 struct btrfs_root
*latest_root
);
1568 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1569 *root
, const char *name
, int name_len
, u64 dir
,
1570 struct btrfs_key
*location
, u8 type
);
1571 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1572 struct btrfs_root
*root
,
1573 struct btrfs_path
*path
, u64 dir
,
1574 const char *name
, int name_len
,
1576 struct btrfs_dir_item
*
1577 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1578 struct btrfs_root
*root
,
1579 struct btrfs_path
*path
, u64 dir
,
1580 u64 objectid
, const char *name
, int name_len
,
1582 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1583 struct btrfs_path
*path
,
1584 const char *name
, int name_len
);
1585 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1586 struct btrfs_root
*root
,
1587 struct btrfs_path
*path
,
1588 struct btrfs_dir_item
*di
);
1589 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1590 struct btrfs_root
*root
, const char *name
,
1591 u16 name_len
, const void *data
, u16 data_len
,
1593 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1594 struct btrfs_root
*root
,
1595 struct btrfs_path
*path
, u64 dir
,
1596 const char *name
, u16 name_len
,
1599 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1600 struct btrfs_root
*fs_root
,
1601 u64 dirid
, u64
*objectid
);
1602 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1605 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1606 struct btrfs_root
*root
,
1607 const char *name
, int name_len
,
1608 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1609 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1610 struct btrfs_root
*root
,
1611 const char *name
, int name_len
,
1612 u64 inode_objectid
, u64 ref_objectid
);
1613 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1614 struct btrfs_root
*root
,
1615 struct btrfs_path
*path
, u64 objectid
);
1616 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1617 *root
, u64 objectid
, struct btrfs_inode_item
1619 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1620 *root
, struct btrfs_path
*path
,
1621 struct btrfs_key
*location
, int mod
);
1624 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1625 struct btrfs_root
*root
,
1626 u64 objectid
, u64 pos
, u64 offset
,
1629 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
1630 struct btrfs_root
*root
, u64 objectid
,
1631 u64 offset
, char *buffer
, size_t size
);
1632 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1633 struct btrfs_root
*root
,
1634 struct btrfs_path
*path
, u64 objectid
,
1635 u64 bytenr
, int mod
);
1636 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
1637 struct btrfs_root
*root
,
1638 struct btrfs_inode_item
*inode
,
1639 u64 objectid
, u64 offset
,
1640 char *data
, size_t len
);
1641 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1642 struct btrfs_root
*root
,
1643 struct btrfs_path
*path
,
1644 u64 objectid
, u64 offset
,
1646 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1647 struct btrfs_root
*root
, struct btrfs_path
*path
,