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 "_BBRfS_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 /* grouping information for allocation decisions */
166 /* seek speed 0-100 where 100 is fastest */
169 /* bandwidth 0-100 where 100 is fastest */
172 /* btrfs generated uuid for this device */
173 u8 uuid
[BTRFS_UUID_SIZE
];
174 } __attribute__ ((__packed__
));
176 struct btrfs_stripe
{
179 u8 dev_uuid
[BTRFS_UUID_SIZE
];
180 } __attribute__ ((__packed__
));
183 /* size of this chunk in bytes */
186 /* objectid of the root referencing this chunk */
192 /* optimal io alignment for this chunk */
195 /* optimal io width for this chunk */
198 /* minimal io size for this chunk */
201 /* 2^16 stripes is quite a lot, a second limit is the size of a single
206 /* sub stripes only matter for raid10 */
208 struct btrfs_stripe stripe
;
209 /* additional stripes go here */
210 } __attribute__ ((__packed__
));
212 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
214 BUG_ON(num_stripes
== 0);
215 return sizeof(struct btrfs_chunk
) +
216 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
219 #define BTRFS_FSID_SIZE 16
220 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
223 * every tree block (leaf or node) starts with this header.
225 struct btrfs_header
{
226 /* these first four must match the super block */
227 u8 csum
[BTRFS_CSUM_SIZE
];
228 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
229 __le64 bytenr
; /* which block this node is supposed to live in */
232 /* allowed to be different from the super from here on down */
233 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
238 } __attribute__ ((__packed__
));
240 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
241 sizeof(struct btrfs_header)) / \
242 sizeof(struct btrfs_key_ptr))
243 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
244 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
245 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
246 sizeof(struct btrfs_item) - \
247 sizeof(struct btrfs_file_extent_item))
250 * this is a very generous portion of the super block, giving us
251 * room to translate 14 chunks with 3 stripes each.
253 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
254 #define BTRFS_LABEL_SIZE 256
257 * the super block basically lists the main trees of the FS
258 * it currently lacks any block count etc etc
260 struct btrfs_super_block
{
261 u8 csum
[BTRFS_CSUM_SIZE
];
262 /* the first 3 fields must match struct btrfs_header */
263 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
264 __le64 bytenr
; /* this block number */
267 /* allowed to be different from the btrfs_header from here own down */
275 __le64 root_dir_objectid
;
281 __le32 sys_chunk_array_size
;
282 __le64 chunk_root_generation
;
286 struct btrfs_dev_item dev_item
;
287 char label
[BTRFS_LABEL_SIZE
];
288 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
289 } __attribute__ ((__packed__
));
292 * A leaf is full of items. offset and size tell us where to find
293 * the item in the leaf (relative to the start of the data area)
296 struct btrfs_disk_key key
;
299 } __attribute__ ((__packed__
));
302 * leaves have an item area and a data area:
303 * [item0, item1....itemN] [free space] [dataN...data1, data0]
305 * The data is separate from the items to get the keys closer together
309 struct btrfs_header header
;
310 struct btrfs_item items
[];
311 } __attribute__ ((__packed__
));
314 * all non-leaf blocks are nodes, they hold only keys and pointers to
317 struct btrfs_key_ptr
{
318 struct btrfs_disk_key key
;
321 } __attribute__ ((__packed__
));
324 struct btrfs_header header
;
325 struct btrfs_key_ptr ptrs
[];
326 } __attribute__ ((__packed__
));
329 * btrfs_paths remember the path taken from the root down to the leaf.
330 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
331 * to any other levels that are present.
333 * The slots array records the index of the item or block pointer
334 * used while walking the tree.
337 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
338 int slots
[BTRFS_MAX_LEVEL
];
344 * items in the extent btree are used to record the objectid of the
345 * owner of the block and the number of references
347 struct btrfs_extent_item
{
349 } __attribute__ ((__packed__
));
351 struct btrfs_extent_ref
{
356 } __attribute__ ((__packed__
));
358 /* dev extents record free space on individual devices. The owner
359 * field points back to the chunk allocation mapping tree that allocated
360 * the extent. The chunk tree uuid field is a way to double check the owner
362 struct btrfs_dev_extent
{
364 __le64 chunk_objectid
;
367 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
368 } __attribute__ ((__packed__
));
370 struct btrfs_inode_ref
{
374 } __attribute__ ((__packed__
));
376 struct btrfs_timespec
{
379 } __attribute__ ((__packed__
));
382 BTRFS_COMPRESS_NONE
= 0,
383 BTRFS_COMPRESS_ZLIB
= 1,
384 BTRFS_COMPRESS_LAST
= 2,
385 } btrfs_compression_type
;
387 /* we don't understand any encryption methods right now */
389 BTRFS_ENCRYPTION_NONE
= 0,
390 BTRFS_ENCRYPTION_LAST
= 1,
391 } btrfs_encryption_type
;
393 struct btrfs_inode_item
{
394 /* nfs style generation number */
396 /* transid that last touched this inode */
409 struct btrfs_timespec atime
;
410 struct btrfs_timespec ctime
;
411 struct btrfs_timespec mtime
;
412 struct btrfs_timespec otime
;
413 } __attribute__ ((__packed__
));
415 struct btrfs_dir_item
{
416 struct btrfs_disk_key location
;
421 } __attribute__ ((__packed__
));
423 struct btrfs_root_item
{
424 struct btrfs_inode_item inode
;
432 struct btrfs_disk_key drop_progress
;
435 } __attribute__ ((__packed__
));
437 #define BTRFS_FILE_EXTENT_REG 0
438 #define BTRFS_FILE_EXTENT_INLINE 1
440 struct btrfs_file_extent_item
{
442 * transaction id that created this extent
446 * max number of bytes to hold this extent in ram
447 * when we split a compressed extent we can't know how big
448 * each of the resulting pieces will be. So, this is
449 * an upper limit on the size of the extent in ram instead of
455 * 32 bits for the various ways we might encode the data,
456 * including compression and encryption. If any of these
457 * are set to something a given disk format doesn't understand
458 * it is treated like an incompat flag for reading and writing,
463 __le16 other_encoding
; /* spare for later use */
465 /* are we inline data or a real extent? */
469 * disk space consumed by the extent, checksum blocks are included
473 __le64 disk_num_bytes
;
475 * the logical offset in file blocks (no csums)
476 * this extent record is for. This allows a file extent to point
477 * into the middle of an existing extent on disk, sharing it
478 * between two snapshots (useful if some bytes in the middle of the
479 * extent have changed
483 * the logical number of file blocks (no csums included)
487 } __attribute__ ((__packed__
));
489 struct btrfs_csum_item
{
491 } __attribute__ ((__packed__
));
493 /* tag for the radix tree of block groups in ram */
494 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
495 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
496 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
497 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
498 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
499 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
500 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
502 struct btrfs_block_group_item
{
504 __le64 chunk_objectid
;
506 } __attribute__ ((__packed__
));
508 struct btrfs_space_info
{
514 struct list_head list
;
517 struct btrfs_block_group_cache
{
518 struct cache_extent cache
;
519 struct btrfs_key key
;
520 struct btrfs_block_group_item item
;
521 struct btrfs_space_info
*space_info
;
527 struct btrfs_extent_ops
{
528 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
529 u64 hint_byte
, struct btrfs_key
*ins
);
530 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
535 struct btrfs_fs_devices
;
536 struct btrfs_fs_info
{
537 u8 fsid
[BTRFS_FSID_SIZE
];
538 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
539 struct btrfs_root
*fs_root
;
540 struct btrfs_root
*extent_root
;
541 struct btrfs_root
*tree_root
;
542 struct btrfs_root
*chunk_root
;
543 struct btrfs_root
*dev_root
;
545 /* the log root tree is a directory of all the other log roots */
546 struct btrfs_root
*log_root_tree
;
548 struct extent_io_tree extent_cache
;
549 struct extent_io_tree free_space_cache
;
550 struct extent_io_tree block_group_cache
;
551 struct extent_io_tree pinned_extents
;
552 struct extent_io_tree pending_del
;
553 struct extent_io_tree extent_ins
;
555 /* logical->physical extent mapping */
556 struct btrfs_mapping_tree mapping_tree
;
559 u64 last_trans_committed
;
561 u64 avail_data_alloc_bits
;
562 u64 avail_metadata_alloc_bits
;
563 u64 avail_system_alloc_bits
;
564 u64 data_alloc_profile
;
565 u64 metadata_alloc_profile
;
566 u64 system_alloc_profile
;
569 struct btrfs_trans_handle
*running_transaction
;
570 struct btrfs_super_block super_copy
;
571 struct extent_buffer
*sb_buffer
;
572 struct mutex fs_mutex
;
575 struct btrfs_extent_ops
*extent_ops
;
576 struct list_head dirty_cowonly_roots
;
578 struct btrfs_fs_devices
*fs_devices
;
579 struct list_head space_info
;
585 * in ram representation of the tree. extent_root is used for all allocations
586 * and for the extent tree extent_root root.
589 struct extent_buffer
*node
;
590 struct extent_buffer
*commit_root
;
591 struct btrfs_root_item root_item
;
592 struct btrfs_key root_key
;
593 struct btrfs_fs_info
*fs_info
;
597 /* data allocations are done in sectorsize units */
600 /* node allocations are done in nodesize units */
603 /* leaf allocations are done in leafsize units */
606 /* leaf allocations are done in leafsize units */
615 u64 last_inode_alloc
;
617 /* the dirty list is only used by non-reference counted roots */
618 struct list_head dirty_list
;
622 * inode items have the data typically returned from stat and store other
623 * info about object characteristics. There is one for every file and dir in
626 #define BTRFS_INODE_ITEM_KEY 1
627 #define BTRFS_INODE_REF_KEY 2
628 #define BTRFS_XATTR_ITEM_KEY 8
629 #define BTRFS_ORPHAN_ITEM_KEY 9
631 /* reserve 3-15 close to the inode for later flexibility */
634 * dir items are the name -> inode pointers in a directory. There is one
635 * for every name in a directory.
637 #define BTRFS_DIR_ITEM_KEY 16
638 #define BTRFS_DIR_INDEX_KEY 17
640 * extent data is for file data
642 #define BTRFS_EXTENT_DATA_KEY 18
644 * csum items have the checksums for data in the extents
646 #define BTRFS_CSUM_ITEM_KEY 19
648 /* reserve 20-31 for other file stuff */
651 * root items point to tree roots. There are typically in the root
652 * tree used by the super block to find all the other trees
654 #define BTRFS_ROOT_ITEM_KEY 32
656 * extent items are in the extent map tree. These record which blocks
657 * are used, and how many references there are to each block
659 #define BTRFS_EXTENT_ITEM_KEY 33
660 #define BTRFS_EXTENT_REF_KEY 34
663 * block groups give us hints into the extent allocation trees. Which
664 * blocks are free etc etc
666 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
668 #define BTRFS_DEV_EXTENT_KEY 75
669 #define BTRFS_DEV_ITEM_KEY 76
670 #define BTRFS_CHUNK_ITEM_KEY 77
673 * string items are for debugging. They just store a short string of
676 #define BTRFS_STRING_ITEM_KEY 253
680 #define BTRFS_INODE_NODATASUM (1 << 0)
681 #define BTRFS_INODE_NODATACOW (1 << 1)
682 #define BTRFS_INODE_READONLY (1 << 2)
684 #define read_eb_member(eb, ptr, type, member, result) ( \
685 read_extent_buffer(eb, (char *)(result), \
686 ((unsigned long)(ptr)) + \
687 offsetof(type, member), \
688 sizeof(((type *)0)->member)))
690 #define write_eb_member(eb, ptr, type, member, result) ( \
691 write_extent_buffer(eb, (char *)(result), \
692 ((unsigned long)(ptr)) + \
693 offsetof(type, member), \
694 sizeof(((type *)0)->member)))
696 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
697 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
699 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
700 return le##bits##_to_cpu(h->member); \
702 static inline void btrfs_set_##name(struct extent_buffer *eb, \
705 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
706 h->member = cpu_to_le##bits(val); \
709 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
710 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
713 unsigned long offset = (unsigned long)s; \
714 type *p = (type *) (eb->data + offset); \
715 return le##bits##_to_cpu(p->member); \
717 static inline void btrfs_set_##name(struct extent_buffer *eb, \
718 type *s, u##bits val) \
720 unsigned long offset = (unsigned long)s; \
721 type *p = (type *) (eb->data + offset); \
722 p->member = cpu_to_le##bits(val); \
725 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
726 static inline u##bits btrfs_##name(type *s) \
728 return le##bits##_to_cpu(s->member); \
730 static inline void btrfs_set_##name(type *s, u##bits val) \
732 s->member = cpu_to_le##bits(val); \
735 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
736 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
737 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
738 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
739 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
740 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
741 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
742 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
743 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
744 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
746 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
747 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
749 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
751 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
753 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
755 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
757 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
758 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
760 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
762 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
765 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
767 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
770 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
771 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
772 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
773 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
774 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
775 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
776 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
777 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
778 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
779 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
780 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
782 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
784 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
787 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
788 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
789 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
791 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
793 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
795 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
797 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
798 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
800 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
802 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
803 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
805 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
808 unsigned long offset
= (unsigned long)c
;
809 offset
+= offsetof(struct btrfs_chunk
, stripe
);
810 offset
+= nr
* sizeof(struct btrfs_stripe
);
811 return (struct btrfs_stripe
*)offset
;
814 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
816 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
819 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
820 struct btrfs_chunk
*c
, int nr
)
822 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
825 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
826 struct btrfs_chunk
*c
, int nr
,
829 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
832 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
833 struct btrfs_chunk
*c
, int nr
)
835 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
838 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
839 struct btrfs_chunk
*c
, int nr
,
842 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
845 /* struct btrfs_block_group_item */
846 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
848 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
850 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
851 struct btrfs_block_group_item
, chunk_objectid
, 64);
853 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
854 struct btrfs_block_group_item
, chunk_objectid
, 64);
855 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
856 struct btrfs_block_group_item
, flags
, 64);
857 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
858 struct btrfs_block_group_item
, flags
, 64);
860 /* struct btrfs_inode_ref */
861 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
862 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
864 /* struct btrfs_inode_item */
865 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
866 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
867 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
868 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
869 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
870 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
871 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
872 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
873 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
874 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
875 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
876 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
879 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
880 struct btrfs_inode_item
, generation
, 64);
881 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
882 struct btrfs_inode_item
, size
, 64);
883 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
884 struct btrfs_inode_item
, nbytes
, 64);
885 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
886 struct btrfs_inode_item
, block_group
, 64);
887 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
888 struct btrfs_inode_item
, nlink
, 32);
889 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
890 struct btrfs_inode_item
, uid
, 32);
891 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
892 struct btrfs_inode_item
, gid
, 32);
893 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
894 struct btrfs_inode_item
, mode
, 32);
895 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
896 struct btrfs_inode_item
, rdev
, 64);
897 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
898 struct btrfs_inode_item
, flags
, 16);
899 BTRFS_SETGET_STACK_FUNCS(stack_inode_compat_flags
,
900 struct btrfs_inode_item
, compat_flags
, 16);
902 static inline struct btrfs_timespec
*
903 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
905 unsigned long ptr
= (unsigned long)inode_item
;
906 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
907 return (struct btrfs_timespec
*)ptr
;
910 static inline struct btrfs_timespec
*
911 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
913 unsigned long ptr
= (unsigned long)inode_item
;
914 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
915 return (struct btrfs_timespec
*)ptr
;
918 static inline struct btrfs_timespec
*
919 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
921 unsigned long ptr
= (unsigned long)inode_item
;
922 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
923 return (struct btrfs_timespec
*)ptr
;
926 static inline struct btrfs_timespec
*
927 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
929 unsigned long ptr
= (unsigned long)inode_item
;
930 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
931 return (struct btrfs_timespec
*)ptr
;
934 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
935 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
936 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
938 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
941 /* struct btrfs_dev_extent */
942 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
944 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
946 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
948 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
950 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
952 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
953 return (u8
*)((unsigned long)dev
+ ptr
);
956 /* struct btrfs_extent_ref */
957 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
958 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
959 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
960 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
962 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
963 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
965 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
967 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
970 /* struct btrfs_extent_item */
971 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
972 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
975 /* struct btrfs_node */
976 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
977 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
979 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
982 ptr
= offsetof(struct btrfs_node
, ptrs
) +
983 sizeof(struct btrfs_key_ptr
) * nr
;
984 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
987 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
991 ptr
= offsetof(struct btrfs_node
, ptrs
) +
992 sizeof(struct btrfs_key_ptr
) * nr
;
993 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
996 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
999 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1000 sizeof(struct btrfs_key_ptr
) * nr
;
1001 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1004 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1008 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1009 sizeof(struct btrfs_key_ptr
) * nr
;
1010 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1013 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1015 return offsetof(struct btrfs_node
, ptrs
) +
1016 sizeof(struct btrfs_key_ptr
) * nr
;
1019 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1020 struct btrfs_disk_key
*disk_key
, int nr
)
1023 ptr
= btrfs_node_key_ptr_offset(nr
);
1024 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1025 struct btrfs_key_ptr
, key
, disk_key
);
1028 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1029 struct btrfs_disk_key
*disk_key
, int nr
)
1032 ptr
= btrfs_node_key_ptr_offset(nr
);
1033 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1034 struct btrfs_key_ptr
, key
, disk_key
);
1037 /* struct btrfs_item */
1038 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1039 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1041 static inline unsigned long btrfs_item_nr_offset(int nr
)
1043 return offsetof(struct btrfs_leaf
, items
) +
1044 sizeof(struct btrfs_item
) * nr
;
1047 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1050 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1053 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1054 struct btrfs_item
*item
)
1056 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1059 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1061 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1064 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1066 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1069 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1071 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1074 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1075 struct btrfs_disk_key
*disk_key
, int nr
)
1077 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1078 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1081 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1082 struct btrfs_disk_key
*disk_key
, int nr
)
1084 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1085 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1088 /* struct btrfs_dir_item */
1089 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1090 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1091 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1092 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1094 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1095 struct btrfs_dir_item
*item
,
1096 struct btrfs_disk_key
*key
)
1098 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1101 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1102 struct btrfs_dir_item
*item
,
1103 struct btrfs_disk_key
*key
)
1105 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1108 /* struct btrfs_disk_key */
1109 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1111 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1112 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1114 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1115 struct btrfs_disk_key
*disk
)
1117 cpu
->offset
= le64_to_cpu(disk
->offset
);
1118 cpu
->type
= disk
->type
;
1119 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1122 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1123 struct btrfs_key
*cpu
)
1125 disk
->offset
= cpu_to_le64(cpu
->offset
);
1126 disk
->type
= cpu
->type
;
1127 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1130 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1131 struct btrfs_key
*key
, int nr
)
1133 struct btrfs_disk_key disk_key
;
1134 btrfs_node_key(eb
, &disk_key
, nr
);
1135 btrfs_disk_key_to_cpu(key
, &disk_key
);
1138 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1139 struct btrfs_key
*key
, int nr
)
1141 struct btrfs_disk_key disk_key
;
1142 btrfs_item_key(eb
, &disk_key
, nr
);
1143 btrfs_disk_key_to_cpu(key
, &disk_key
);
1146 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1147 struct btrfs_dir_item
*item
,
1148 struct btrfs_key
*key
)
1150 struct btrfs_disk_key disk_key
;
1151 btrfs_dir_item_key(eb
, item
, &disk_key
);
1152 btrfs_disk_key_to_cpu(key
, &disk_key
);
1156 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1161 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1166 /* struct btrfs_header */
1167 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1168 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1170 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1171 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1172 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1173 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1175 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1177 return (btrfs_header_flags(eb
) & flag
) == flag
;
1180 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1182 u64 flags
= btrfs_header_flags(eb
);
1183 btrfs_set_header_flags(eb
, flags
| flag
);
1184 return (flags
& flag
) == flag
;
1187 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1189 u64 flags
= btrfs_header_flags(eb
);
1190 btrfs_set_header_flags(eb
, flags
& ~flag
);
1191 return (flags
& flag
) == flag
;
1194 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1196 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1200 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1202 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1206 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1208 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1212 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1214 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1218 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1223 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1228 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1233 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1235 return (btrfs_header_level(eb
) == 0);
1238 /* struct btrfs_root_item */
1239 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1241 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1242 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1243 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1245 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1247 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1248 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1249 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1250 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1251 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1252 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1253 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1255 /* struct btrfs_super_block */
1256 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1257 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1259 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1260 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1261 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1262 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1263 struct btrfs_super_block
, chunk_root_generation
, 64);
1264 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1266 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1268 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1269 chunk_root_level
, 8);
1270 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1272 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1274 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1276 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1278 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1280 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1282 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1284 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1286 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1287 root_dir_objectid
, 64);
1288 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1291 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1293 return offsetof(struct btrfs_leaf
, items
);
1296 /* struct btrfs_file_extent_item */
1297 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1299 static inline unsigned long btrfs_file_extent_inline_start(struct
1300 btrfs_file_extent_item
*e
)
1302 unsigned long offset
= (unsigned long)e
;
1303 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1307 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1309 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1312 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1313 struct btrfs_item
*e
)
1315 unsigned long offset
;
1316 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1317 return btrfs_item_size(eb
, e
) - offset
;
1320 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1322 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1324 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1325 disk_num_bytes
, 64);
1326 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1328 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1330 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1332 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1334 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1336 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1337 other_encoding
, 16);
1339 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1341 return root
->leafsize
;
1342 return root
->nodesize
;
1345 /* helper function to cast into the data area of the leaf. */
1346 #define btrfs_item_ptr(leaf, slot, type) \
1347 ((type *)(btrfs_leaf_data(leaf) + \
1348 btrfs_item_offset_nr(leaf, slot)))
1350 #define btrfs_item_ptr_offset(leaf, slot) \
1351 ((unsigned long)(btrfs_leaf_data(leaf) + \
1352 btrfs_item_offset_nr(leaf, slot)))
1355 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1356 struct btrfs_root
*root
);
1357 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1358 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1359 btrfs_fs_info
*info
,
1361 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1362 struct btrfs_block_group_cache
1363 *hint
, u64 search_start
,
1364 int data
, int owner
);
1365 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1366 struct btrfs_root
*root
,
1367 u32 blocksize
, u64 parent
,
1373 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1374 struct btrfs_root
*root
,
1375 u64 num_bytes
, u64 parent
,
1376 u64 root_objectid
, u64 ref_generation
,
1377 u64 owner
, u64 empty_size
, u64 hint_byte
,
1378 u64 search_end
, struct btrfs_key
*ins
, int data
);
1379 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1380 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1382 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1383 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1384 struct extent_buffer
*buf
, int start_slot
, int nr
);
1385 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1386 *root
, u64 bytenr
, u64 num_bytes
, u64 parent
,
1387 u64 root_objectid
, u64 ref_generation
,
1388 u64 owner_objectid
, int pin
);
1389 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1390 struct btrfs_root
*root
,
1391 struct extent_io_tree
*unpin
);
1392 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1393 struct btrfs_root
*root
,
1394 u64 bytenr
, u64 num_bytes
, u64 parent
,
1395 u64 root_objectid
, u64 ref_generation
,
1396 u64 owner_objectid
);
1397 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1398 struct btrfs_root
*root
, u64 bytenr
,
1399 u64 orig_parent
, u64 parent
,
1400 u64 root_objectid
, u64 ref_generation
,
1401 u64 owner_objectid
);
1402 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1403 struct btrfs_root
*root
);
1404 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1405 int btrfs_read_block_groups(struct btrfs_root
*root
);
1406 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1407 struct btrfs_root
*root
, u64 bytes_used
,
1408 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1410 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
1411 struct btrfs_root
*root
);
1412 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
1413 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
1414 int alloc
, int mark_free
);
1416 int btrfs_previous_item(struct btrfs_root
*root
,
1417 struct btrfs_path
*path
, u64 min_objectid
,
1419 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
1420 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1421 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1422 struct extent_buffer
*parent
, int parent_slot
,
1423 struct extent_buffer
**cow_ret
);
1424 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1425 struct btrfs_root
*root
,
1426 struct extent_buffer
*buf
,
1427 struct extent_buffer
*parent
, int parent_slot
,
1428 struct extent_buffer
**cow_ret
,
1429 u64 search_start
, u64 empty_size
);
1430 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1431 struct btrfs_root
*root
,
1432 struct extent_buffer
*buf
,
1433 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1434 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1435 *root
, struct btrfs_path
*path
, u32 data_size
);
1436 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1437 struct btrfs_root
*root
,
1438 struct btrfs_path
*path
,
1439 u32 new_size
, int from_end
);
1440 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1441 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1443 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1444 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1445 int start_slot
, int cache_only
, u64
*last_ret
,
1446 struct btrfs_key
*progress
);
1447 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1448 struct btrfs_path
*btrfs_alloc_path(void);
1449 void btrfs_free_path(struct btrfs_path
*p
);
1450 void btrfs_init_path(struct btrfs_path
*p
);
1451 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1452 struct btrfs_path
*path
, int slot
, int nr
);
1454 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1455 struct btrfs_root
*root
,
1456 struct btrfs_path
*path
)
1458 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1461 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1462 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1463 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1464 struct btrfs_root
*root
,
1465 struct btrfs_path
*path
,
1466 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1468 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1469 struct btrfs_root
*root
,
1470 struct btrfs_path
*path
,
1471 struct btrfs_key
*key
,
1474 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1477 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1478 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1479 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1480 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1482 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1483 struct btrfs_root
*root
, struct btrfs_path
*path
,
1484 struct btrfs_key
*new_key
);
1487 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1488 struct btrfs_key
*key
);
1489 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1490 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1492 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1493 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1495 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1496 btrfs_root_item
*item
, struct btrfs_key
*key
);
1497 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1498 struct btrfs_root
*latest_root
);
1500 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1501 *root
, const char *name
, int name_len
, u64 dir
,
1502 struct btrfs_key
*location
, u8 type
);
1503 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1504 struct btrfs_root
*root
,
1505 struct btrfs_path
*path
, u64 dir
,
1506 const char *name
, int name_len
,
1508 struct btrfs_dir_item
*
1509 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1510 struct btrfs_root
*root
,
1511 struct btrfs_path
*path
, u64 dir
,
1512 u64 objectid
, const char *name
, int name_len
,
1514 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1515 struct btrfs_path
*path
,
1516 const char *name
, int name_len
);
1517 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1518 struct btrfs_root
*root
,
1519 struct btrfs_path
*path
,
1520 struct btrfs_dir_item
*di
);
1521 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1522 struct btrfs_root
*root
, const char *name
,
1523 u16 name_len
, const void *data
, u16 data_len
,
1525 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1526 struct btrfs_root
*root
,
1527 struct btrfs_path
*path
, u64 dir
,
1528 const char *name
, u16 name_len
,
1531 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1532 struct btrfs_root
*fs_root
,
1533 u64 dirid
, u64
*objectid
);
1534 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1537 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1538 struct btrfs_root
*root
,
1539 const char *name
, int name_len
,
1540 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1541 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1542 struct btrfs_root
*root
,
1543 const char *name
, int name_len
,
1544 u64 inode_objectid
, u64 ref_objectid
);
1545 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1546 struct btrfs_root
*root
,
1547 struct btrfs_path
*path
, u64 objectid
);
1548 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1549 *root
, u64 objectid
, struct btrfs_inode_item
1551 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1552 *root
, struct btrfs_path
*path
,
1553 struct btrfs_key
*location
, int mod
);
1556 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1557 struct btrfs_root
*root
,
1558 u64 objectid
, u64 pos
, u64 offset
,
1561 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
1562 struct btrfs_root
*root
, u64 objectid
,
1563 u64 offset
, char *buffer
, size_t size
);
1564 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1565 struct btrfs_root
*root
,
1566 struct btrfs_path
*path
, u64 objectid
,
1567 u64 bytenr
, int mod
);
1568 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
1569 struct btrfs_root
*root
,
1570 struct btrfs_inode_item
*inode
,
1571 u64 objectid
, u64 offset
,
1572 char *data
, size_t len
);
1573 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1574 struct btrfs_root
*root
,
1575 struct btrfs_path
*path
,
1576 u64 objectid
, u64 offset
,
1578 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1579 struct btrfs_root
*root
, struct btrfs_path
*path
,