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
;
285 struct btrfs_dev_item dev_item
;
286 char label
[BTRFS_LABEL_SIZE
];
287 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
288 } __attribute__ ((__packed__
));
291 * A leaf is full of items. offset and size tell us where to find
292 * the item in the leaf (relative to the start of the data area)
295 struct btrfs_disk_key key
;
298 } __attribute__ ((__packed__
));
301 * leaves have an item area and a data area:
302 * [item0, item1....itemN] [free space] [dataN...data1, data0]
304 * The data is separate from the items to get the keys closer together
308 struct btrfs_header header
;
309 struct btrfs_item items
[];
310 } __attribute__ ((__packed__
));
313 * all non-leaf blocks are nodes, they hold only keys and pointers to
316 struct btrfs_key_ptr
{
317 struct btrfs_disk_key key
;
320 } __attribute__ ((__packed__
));
323 struct btrfs_header header
;
324 struct btrfs_key_ptr ptrs
[];
325 } __attribute__ ((__packed__
));
328 * btrfs_paths remember the path taken from the root down to the leaf.
329 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
330 * to any other levels that are present.
332 * The slots array records the index of the item or block pointer
333 * used while walking the tree.
336 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
337 int slots
[BTRFS_MAX_LEVEL
];
343 * items in the extent btree are used to record the objectid of the
344 * owner of the block and the number of references
346 struct btrfs_extent_item
{
348 } __attribute__ ((__packed__
));
350 struct btrfs_extent_ref
{
355 } __attribute__ ((__packed__
));
357 /* dev extents record free space on individual devices. The owner
358 * field points back to the chunk allocation mapping tree that allocated
359 * the extent. The chunk tree uuid field is a way to double check the owner
361 struct btrfs_dev_extent
{
363 __le64 chunk_objectid
;
366 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
367 } __attribute__ ((__packed__
));
369 struct btrfs_inode_ref
{
373 } __attribute__ ((__packed__
));
375 struct btrfs_timespec
{
378 } __attribute__ ((__packed__
));
381 BTRFS_COMPRESS_NONE
= 0,
382 BTRFS_COMPRESS_ZLIB
= 1,
383 BTRFS_COMPRESS_LAST
= 2,
384 } btrfs_compression_type
;
386 /* we don't understand any encryption methods right now */
388 BTRFS_ENCRYPTION_NONE
= 0,
389 BTRFS_ENCRYPTION_LAST
= 1,
390 } btrfs_encryption_type
;
392 struct btrfs_inode_item
{
393 /* nfs style generation number */
395 /* transid that last touched this inode */
408 struct btrfs_timespec atime
;
409 struct btrfs_timespec ctime
;
410 struct btrfs_timespec mtime
;
411 struct btrfs_timespec otime
;
412 } __attribute__ ((__packed__
));
414 struct btrfs_dir_item
{
415 struct btrfs_disk_key location
;
420 } __attribute__ ((__packed__
));
422 struct btrfs_root_item
{
423 struct btrfs_inode_item inode
;
430 struct btrfs_disk_key drop_progress
;
433 } __attribute__ ((__packed__
));
435 #define BTRFS_FILE_EXTENT_REG 0
436 #define BTRFS_FILE_EXTENT_INLINE 1
438 struct btrfs_file_extent_item
{
440 * transaction id that created this extent
444 * max number of bytes to hold this extent in ram
445 * when we split a compressed extent we can't know how big
446 * each of the resulting pieces will be. So, this is
447 * an upper limit on the size of the extent in ram instead of
453 * 32 bits for the various ways we might encode the data,
454 * including compression and encryption. If any of these
455 * are set to something a given disk format doesn't understand
456 * it is treated like an incompat flag for reading and writing,
461 __le16 other_encoding
; /* spare for later use */
463 /* are we inline data or a real extent? */
467 * disk space consumed by the extent, checksum blocks are included
471 __le64 disk_num_bytes
;
473 * the logical offset in file blocks (no csums)
474 * this extent record is for. This allows a file extent to point
475 * into the middle of an existing extent on disk, sharing it
476 * between two snapshots (useful if some bytes in the middle of the
477 * extent have changed
481 * the logical number of file blocks (no csums included)
485 } __attribute__ ((__packed__
));
487 struct btrfs_csum_item
{
489 } __attribute__ ((__packed__
));
491 /* tag for the radix tree of block groups in ram */
492 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
493 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
494 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
495 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
496 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
497 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
498 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
500 struct btrfs_block_group_item
{
502 __le64 chunk_objectid
;
504 } __attribute__ ((__packed__
));
506 struct btrfs_space_info
{
512 struct list_head list
;
515 struct btrfs_block_group_cache
{
516 struct cache_extent cache
;
517 struct btrfs_key key
;
518 struct btrfs_block_group_item item
;
519 struct btrfs_space_info
*space_info
;
525 struct btrfs_extent_ops
{
526 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
527 u64 hint_byte
, struct btrfs_key
*ins
);
528 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
533 struct btrfs_fs_devices
;
534 struct btrfs_fs_info
{
535 u8 fsid
[BTRFS_FSID_SIZE
];
536 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
537 struct btrfs_root
*fs_root
;
538 struct btrfs_root
*extent_root
;
539 struct btrfs_root
*tree_root
;
540 struct btrfs_root
*chunk_root
;
541 struct btrfs_root
*dev_root
;
543 /* the log root tree is a directory of all the other log roots */
544 struct btrfs_root
*log_root_tree
;
546 struct extent_io_tree extent_cache
;
547 struct extent_io_tree free_space_cache
;
548 struct extent_io_tree block_group_cache
;
549 struct extent_io_tree pinned_extents
;
550 struct extent_io_tree pending_del
;
551 struct extent_io_tree extent_ins
;
553 /* logical->physical extent mapping */
554 struct btrfs_mapping_tree mapping_tree
;
557 u64 last_trans_committed
;
559 u64 avail_data_alloc_bits
;
560 u64 avail_metadata_alloc_bits
;
561 u64 avail_system_alloc_bits
;
562 u64 data_alloc_profile
;
563 u64 metadata_alloc_profile
;
564 u64 system_alloc_profile
;
567 struct btrfs_trans_handle
*running_transaction
;
568 struct btrfs_super_block super_copy
;
569 struct extent_buffer
*sb_buffer
;
570 struct mutex fs_mutex
;
573 struct btrfs_extent_ops
*extent_ops
;
574 struct list_head dirty_cowonly_roots
;
576 struct btrfs_fs_devices
*fs_devices
;
577 struct list_head space_info
;
583 * in ram representation of the tree. extent_root is used for all allocations
584 * and for the extent tree extent_root root.
587 struct extent_buffer
*node
;
588 struct extent_buffer
*commit_root
;
589 struct btrfs_root_item root_item
;
590 struct btrfs_key root_key
;
591 struct btrfs_fs_info
*fs_info
;
595 /* data allocations are done in sectorsize units */
598 /* node allocations are done in nodesize units */
601 /* leaf allocations are done in leafsize units */
604 /* leaf allocations are done in leafsize units */
613 u64 last_inode_alloc
;
615 /* the dirty list is only used by non-reference counted roots */
616 struct list_head dirty_list
;
620 * inode items have the data typically returned from stat and store other
621 * info about object characteristics. There is one for every file and dir in
624 #define BTRFS_INODE_ITEM_KEY 1
625 #define BTRFS_INODE_REF_KEY 2
626 #define BTRFS_XATTR_ITEM_KEY 8
627 #define BTRFS_ORPHAN_ITEM_KEY 9
629 /* reserve 3-15 close to the inode for later flexibility */
632 * dir items are the name -> inode pointers in a directory. There is one
633 * for every name in a directory.
635 #define BTRFS_DIR_ITEM_KEY 16
636 #define BTRFS_DIR_INDEX_KEY 17
638 * extent data is for file data
640 #define BTRFS_EXTENT_DATA_KEY 18
642 * csum items have the checksums for data in the extents
644 #define BTRFS_CSUM_ITEM_KEY 19
646 /* reserve 20-31 for other file stuff */
649 * root items point to tree roots. There are typically in the root
650 * tree used by the super block to find all the other trees
652 #define BTRFS_ROOT_ITEM_KEY 32
654 * extent items are in the extent map tree. These record which blocks
655 * are used, and how many references there are to each block
657 #define BTRFS_EXTENT_ITEM_KEY 33
658 #define BTRFS_EXTENT_REF_KEY 34
661 * block groups give us hints into the extent allocation trees. Which
662 * blocks are free etc etc
664 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
666 #define BTRFS_DEV_EXTENT_KEY 75
667 #define BTRFS_DEV_ITEM_KEY 76
668 #define BTRFS_CHUNK_ITEM_KEY 77
671 * string items are for debugging. They just store a short string of
674 #define BTRFS_STRING_ITEM_KEY 253
678 #define BTRFS_INODE_NODATASUM (1 << 0)
679 #define BTRFS_INODE_NODATACOW (1 << 1)
680 #define BTRFS_INODE_READONLY (1 << 2)
682 #define read_eb_member(eb, ptr, type, member, result) ( \
683 read_extent_buffer(eb, (char *)(result), \
684 ((unsigned long)(ptr)) + \
685 offsetof(type, member), \
686 sizeof(((type *)0)->member)))
688 #define write_eb_member(eb, ptr, type, member, result) ( \
689 write_extent_buffer(eb, (char *)(result), \
690 ((unsigned long)(ptr)) + \
691 offsetof(type, member), \
692 sizeof(((type *)0)->member)))
694 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
695 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
697 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
698 return le##bits##_to_cpu(h->member); \
700 static inline void btrfs_set_##name(struct extent_buffer *eb, \
703 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
704 h->member = cpu_to_le##bits(val); \
707 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
708 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
711 unsigned long offset = (unsigned long)s; \
712 type *p = (type *) (eb->data + offset); \
713 return le##bits##_to_cpu(p->member); \
715 static inline void btrfs_set_##name(struct extent_buffer *eb, \
716 type *s, u##bits val) \
718 unsigned long offset = (unsigned long)s; \
719 type *p = (type *) (eb->data + offset); \
720 p->member = cpu_to_le##bits(val); \
723 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
724 static inline u##bits btrfs_##name(type *s) \
726 return le##bits##_to_cpu(s->member); \
728 static inline void btrfs_set_##name(type *s, u##bits val) \
730 s->member = cpu_to_le##bits(val); \
733 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
734 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
735 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
736 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
737 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
738 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
739 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
740 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
741 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
742 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
744 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
745 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
747 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
749 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
751 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
753 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
755 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
756 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
758 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
760 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
763 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
765 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
768 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
769 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
770 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
771 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
772 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
773 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
774 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
775 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
776 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
777 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
778 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
780 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
782 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
785 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
786 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
787 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
789 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
791 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
793 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
795 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
796 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
798 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
800 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
801 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
803 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
806 unsigned long offset
= (unsigned long)c
;
807 offset
+= offsetof(struct btrfs_chunk
, stripe
);
808 offset
+= nr
* sizeof(struct btrfs_stripe
);
809 return (struct btrfs_stripe
*)offset
;
812 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
814 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
817 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
818 struct btrfs_chunk
*c
, int nr
)
820 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
823 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
824 struct btrfs_chunk
*c
, int nr
,
827 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
830 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
831 struct btrfs_chunk
*c
, int nr
)
833 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
836 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
837 struct btrfs_chunk
*c
, int nr
,
840 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
843 /* struct btrfs_block_group_item */
844 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
846 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
848 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
849 struct btrfs_block_group_item
, chunk_objectid
, 64);
851 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
852 struct btrfs_block_group_item
, chunk_objectid
, 64);
853 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
854 struct btrfs_block_group_item
, flags
, 64);
855 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
856 struct btrfs_block_group_item
, flags
, 64);
858 /* struct btrfs_inode_ref */
859 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
860 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
862 /* struct btrfs_inode_item */
863 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
864 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
865 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
866 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
867 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
868 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
869 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
870 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
871 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
872 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
873 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
874 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
877 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
878 struct btrfs_inode_item
, generation
, 64);
879 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
880 struct btrfs_inode_item
, size
, 64);
881 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
882 struct btrfs_inode_item
, nbytes
, 64);
883 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
884 struct btrfs_inode_item
, block_group
, 64);
885 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
886 struct btrfs_inode_item
, nlink
, 32);
887 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
888 struct btrfs_inode_item
, uid
, 32);
889 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
890 struct btrfs_inode_item
, gid
, 32);
891 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
892 struct btrfs_inode_item
, mode
, 32);
893 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
894 struct btrfs_inode_item
, rdev
, 64);
895 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
896 struct btrfs_inode_item
, flags
, 16);
897 BTRFS_SETGET_STACK_FUNCS(stack_inode_compat_flags
,
898 struct btrfs_inode_item
, compat_flags
, 16);
900 static inline struct btrfs_timespec
*
901 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
903 unsigned long ptr
= (unsigned long)inode_item
;
904 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
905 return (struct btrfs_timespec
*)ptr
;
908 static inline struct btrfs_timespec
*
909 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
911 unsigned long ptr
= (unsigned long)inode_item
;
912 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
913 return (struct btrfs_timespec
*)ptr
;
916 static inline struct btrfs_timespec
*
917 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
919 unsigned long ptr
= (unsigned long)inode_item
;
920 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
921 return (struct btrfs_timespec
*)ptr
;
924 static inline struct btrfs_timespec
*
925 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
927 unsigned long ptr
= (unsigned long)inode_item
;
928 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
929 return (struct btrfs_timespec
*)ptr
;
932 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
933 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
934 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
936 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
939 /* struct btrfs_dev_extent */
940 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
942 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
944 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
946 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
948 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
950 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
951 return (u8
*)((unsigned long)dev
+ ptr
);
954 /* struct btrfs_extent_ref */
955 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
956 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
957 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
958 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
960 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
961 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
963 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
965 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
968 /* struct btrfs_extent_item */
969 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
970 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
973 /* struct btrfs_node */
974 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
975 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
977 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
980 ptr
= offsetof(struct btrfs_node
, ptrs
) +
981 sizeof(struct btrfs_key_ptr
) * nr
;
982 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
985 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
989 ptr
= offsetof(struct btrfs_node
, ptrs
) +
990 sizeof(struct btrfs_key_ptr
) * nr
;
991 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
994 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
997 ptr
= offsetof(struct btrfs_node
, ptrs
) +
998 sizeof(struct btrfs_key_ptr
) * nr
;
999 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1002 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1006 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1007 sizeof(struct btrfs_key_ptr
) * nr
;
1008 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1011 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1013 return offsetof(struct btrfs_node
, ptrs
) +
1014 sizeof(struct btrfs_key_ptr
) * nr
;
1017 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1018 struct btrfs_disk_key
*disk_key
, int nr
)
1021 ptr
= btrfs_node_key_ptr_offset(nr
);
1022 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1023 struct btrfs_key_ptr
, key
, disk_key
);
1026 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1027 struct btrfs_disk_key
*disk_key
, int nr
)
1030 ptr
= btrfs_node_key_ptr_offset(nr
);
1031 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1032 struct btrfs_key_ptr
, key
, disk_key
);
1035 /* struct btrfs_item */
1036 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1037 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1039 static inline unsigned long btrfs_item_nr_offset(int nr
)
1041 return offsetof(struct btrfs_leaf
, items
) +
1042 sizeof(struct btrfs_item
) * nr
;
1045 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1048 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1051 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1052 struct btrfs_item
*item
)
1054 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1057 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1059 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1062 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1064 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1067 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1069 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1072 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1073 struct btrfs_disk_key
*disk_key
, int nr
)
1075 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1076 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1079 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1080 struct btrfs_disk_key
*disk_key
, int nr
)
1082 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1083 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1086 /* struct btrfs_dir_item */
1087 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1088 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1089 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1090 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1092 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1093 struct btrfs_dir_item
*item
,
1094 struct btrfs_disk_key
*key
)
1096 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1099 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1100 struct btrfs_dir_item
*item
,
1101 struct btrfs_disk_key
*key
)
1103 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1106 /* struct btrfs_disk_key */
1107 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1109 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1110 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1112 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1113 struct btrfs_disk_key
*disk
)
1115 cpu
->offset
= le64_to_cpu(disk
->offset
);
1116 cpu
->type
= disk
->type
;
1117 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1120 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1121 struct btrfs_key
*cpu
)
1123 disk
->offset
= cpu_to_le64(cpu
->offset
);
1124 disk
->type
= cpu
->type
;
1125 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1128 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1129 struct btrfs_key
*key
, int nr
)
1131 struct btrfs_disk_key disk_key
;
1132 btrfs_node_key(eb
, &disk_key
, nr
);
1133 btrfs_disk_key_to_cpu(key
, &disk_key
);
1136 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1137 struct btrfs_key
*key
, int nr
)
1139 struct btrfs_disk_key disk_key
;
1140 btrfs_item_key(eb
, &disk_key
, nr
);
1141 btrfs_disk_key_to_cpu(key
, &disk_key
);
1144 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1145 struct btrfs_dir_item
*item
,
1146 struct btrfs_key
*key
)
1148 struct btrfs_disk_key disk_key
;
1149 btrfs_dir_item_key(eb
, item
, &disk_key
);
1150 btrfs_disk_key_to_cpu(key
, &disk_key
);
1154 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1159 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1164 /* struct btrfs_header */
1165 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1166 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1168 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1169 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1170 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1171 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1173 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1175 return (btrfs_header_flags(eb
) & flag
) == flag
;
1178 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1180 u64 flags
= btrfs_header_flags(eb
);
1181 btrfs_set_header_flags(eb
, flags
| flag
);
1182 return (flags
& flag
) == flag
;
1185 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1187 u64 flags
= btrfs_header_flags(eb
);
1188 btrfs_set_header_flags(eb
, flags
& ~flag
);
1189 return (flags
& flag
) == flag
;
1192 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1194 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1198 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1200 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1204 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1206 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1210 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1212 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1216 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1221 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1226 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1231 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1233 return (btrfs_header_level(eb
) == 0);
1236 /* struct btrfs_root_item */
1237 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1238 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1239 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1241 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1242 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1243 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1244 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1245 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1246 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1247 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1249 /* struct btrfs_super_block */
1250 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1251 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1253 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1254 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1255 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1256 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1258 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1260 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1261 chunk_root_level
, 8);
1262 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1264 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1266 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1268 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1270 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1272 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1274 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1276 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1278 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1279 root_dir_objectid
, 64);
1280 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1283 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1285 return offsetof(struct btrfs_leaf
, items
);
1288 /* struct btrfs_file_extent_item */
1289 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1291 static inline unsigned long btrfs_file_extent_inline_start(struct
1292 btrfs_file_extent_item
*e
)
1294 unsigned long offset
= (unsigned long)e
;
1295 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1299 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1301 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1304 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1305 struct btrfs_item
*e
)
1307 unsigned long offset
;
1308 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1309 return btrfs_item_size(eb
, e
) - offset
;
1312 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1314 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1316 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1317 disk_num_bytes
, 64);
1318 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1320 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1322 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1324 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1326 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1328 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1329 other_encoding
, 16);
1331 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1333 return root
->leafsize
;
1334 return root
->nodesize
;
1337 /* helper function to cast into the data area of the leaf. */
1338 #define btrfs_item_ptr(leaf, slot, type) \
1339 ((type *)(btrfs_leaf_data(leaf) + \
1340 btrfs_item_offset_nr(leaf, slot)))
1342 #define btrfs_item_ptr_offset(leaf, slot) \
1343 ((unsigned long)(btrfs_leaf_data(leaf) + \
1344 btrfs_item_offset_nr(leaf, slot)))
1347 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1348 struct btrfs_root
*root
);
1349 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1350 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1351 btrfs_fs_info
*info
,
1353 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1354 struct btrfs_block_group_cache
1355 *hint
, u64 search_start
,
1356 int data
, int owner
);
1357 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1358 struct btrfs_root
*root
,
1359 u32 blocksize
, u64 parent
,
1365 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1366 struct btrfs_root
*root
,
1367 u64 num_bytes
, u64 parent
,
1368 u64 root_objectid
, u64 ref_generation
,
1369 u64 owner
, u64 empty_size
, u64 hint_byte
,
1370 u64 search_end
, struct btrfs_key
*ins
, int data
);
1371 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1372 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1374 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1375 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1376 struct extent_buffer
*buf
, int start_slot
, int nr
);
1377 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1378 *root
, u64 bytenr
, u64 num_bytes
, u64 parent
,
1379 u64 root_objectid
, u64 ref_generation
,
1380 u64 owner_objectid
, int pin
);
1381 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1382 struct btrfs_root
*root
,
1383 struct extent_io_tree
*unpin
);
1384 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1385 struct btrfs_root
*root
,
1386 u64 bytenr
, u64 num_bytes
, u64 parent
,
1387 u64 root_objectid
, u64 ref_generation
,
1388 u64 owner_objectid
);
1389 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1390 struct btrfs_root
*root
, u64 bytenr
,
1391 u64 orig_parent
, u64 parent
,
1392 u64 root_objectid
, u64 ref_generation
,
1393 u64 owner_objectid
);
1394 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1395 struct btrfs_root
*root
);
1396 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1397 int btrfs_read_block_groups(struct btrfs_root
*root
);
1398 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1399 struct btrfs_root
*root
, u64 bytes_used
,
1400 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1402 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
1403 struct btrfs_root
*root
);
1404 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
1405 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
1406 int alloc
, int mark_free
);
1408 int btrfs_previous_item(struct btrfs_root
*root
,
1409 struct btrfs_path
*path
, u64 min_objectid
,
1411 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
1412 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1413 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1414 struct extent_buffer
*parent
, int parent_slot
,
1415 struct extent_buffer
**cow_ret
);
1416 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1417 struct btrfs_root
*root
,
1418 struct extent_buffer
*buf
,
1419 struct extent_buffer
*parent
, int parent_slot
,
1420 struct extent_buffer
**cow_ret
,
1421 u64 search_start
, u64 empty_size
);
1422 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1423 struct btrfs_root
*root
,
1424 struct extent_buffer
*buf
,
1425 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1426 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1427 *root
, struct btrfs_path
*path
, u32 data_size
);
1428 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1429 struct btrfs_root
*root
,
1430 struct btrfs_path
*path
,
1431 u32 new_size
, int from_end
);
1432 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1433 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1435 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1436 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1437 int start_slot
, int cache_only
, u64
*last_ret
,
1438 struct btrfs_key
*progress
);
1439 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1440 struct btrfs_path
*btrfs_alloc_path(void);
1441 void btrfs_free_path(struct btrfs_path
*p
);
1442 void btrfs_init_path(struct btrfs_path
*p
);
1443 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1444 struct btrfs_path
*path
, int slot
, int nr
);
1446 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1447 struct btrfs_root
*root
,
1448 struct btrfs_path
*path
)
1450 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1453 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1454 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1455 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1456 struct btrfs_root
*root
,
1457 struct btrfs_path
*path
,
1458 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1460 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1461 struct btrfs_root
*root
,
1462 struct btrfs_path
*path
,
1463 struct btrfs_key
*key
,
1466 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1469 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1470 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1471 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1472 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1474 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1475 struct btrfs_root
*root
, struct btrfs_path
*path
,
1476 struct btrfs_key
*new_key
);
1479 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1480 struct btrfs_key
*key
);
1481 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1482 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1484 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1485 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1487 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1488 btrfs_root_item
*item
, struct btrfs_key
*key
);
1489 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1490 struct btrfs_root
*latest_root
);
1492 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1493 *root
, const char *name
, int name_len
, u64 dir
,
1494 struct btrfs_key
*location
, u8 type
);
1495 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1496 struct btrfs_root
*root
,
1497 struct btrfs_path
*path
, u64 dir
,
1498 const char *name
, int name_len
,
1500 struct btrfs_dir_item
*
1501 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1502 struct btrfs_root
*root
,
1503 struct btrfs_path
*path
, u64 dir
,
1504 u64 objectid
, const char *name
, int name_len
,
1506 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1507 struct btrfs_path
*path
,
1508 const char *name
, int name_len
);
1509 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1510 struct btrfs_root
*root
,
1511 struct btrfs_path
*path
,
1512 struct btrfs_dir_item
*di
);
1513 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1514 struct btrfs_root
*root
, const char *name
,
1515 u16 name_len
, const void *data
, u16 data_len
,
1517 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1518 struct btrfs_root
*root
,
1519 struct btrfs_path
*path
, u64 dir
,
1520 const char *name
, u16 name_len
,
1523 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1524 struct btrfs_root
*fs_root
,
1525 u64 dirid
, u64
*objectid
);
1526 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1529 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1530 struct btrfs_root
*root
,
1531 const char *name
, int name_len
,
1532 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1533 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1534 struct btrfs_root
*root
,
1535 const char *name
, int name_len
,
1536 u64 inode_objectid
, u64 ref_objectid
);
1537 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1538 struct btrfs_root
*root
,
1539 struct btrfs_path
*path
, u64 objectid
);
1540 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1541 *root
, u64 objectid
, struct btrfs_inode_item
1543 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1544 *root
, struct btrfs_path
*path
,
1545 struct btrfs_key
*location
, int mod
);
1548 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1549 struct btrfs_root
*root
,
1550 u64 objectid
, u64 pos
, u64 offset
,
1553 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
1554 struct btrfs_root
*root
, u64 objectid
,
1555 u64 offset
, char *buffer
, size_t size
);
1556 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1557 struct btrfs_root
*root
,
1558 struct btrfs_path
*path
, u64 objectid
,
1559 u64 bytenr
, int mod
);
1560 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
1561 struct btrfs_root
*root
,
1562 struct btrfs_inode_item
*inode
,
1563 u64 objectid
, u64 offset
,
1564 char *data
, size_t len
);
1565 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1566 struct btrfs_root
*root
,
1567 struct btrfs_path
*path
,
1568 u64 objectid
, u64 offset
,
1570 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1571 struct btrfs_root
*root
, struct btrfs_path
*path
,