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 "_BHRfS_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
57 /* holds checksums of all the data extents */
58 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
61 /* oprhan objectid for tracking unlinked/truncated files */
62 #define BTRFS_ORPHAN_OBJECTID -5ULL
64 /* does write ahead logging to speed up fsyncs */
65 #define BTRFS_TREE_LOG_OBJECTID -6ULL
66 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
69 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
70 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
73 * extent checksums all have this objectid
74 * this allows them to share the logging tree
77 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
79 /* dummy objectid represents multiple objectids */
80 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
83 * All files have objectids in this range.
85 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
86 #define BTRFS_LAST_FREE_OBJECTID -256ULL
87 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
92 * the device items go into the chunk tree. The key is in the form
93 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
95 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
98 * we can actually store much bigger names, but lets not confuse the rest
101 #define BTRFS_NAME_LEN 255
103 /* 32 bytes in various csum fields */
104 #define BTRFS_CSUM_SIZE 32
107 #define BTRFS_CSUM_TYPE_CRC32 0
111 #define BTRFS_CSUM_TYPE_CRC32 0
113 static int btrfs_csum_sizes
[] = { 4, 0 };
115 /* four bytes for CRC32 */
116 #define BTRFS_CRC32_SIZE 4
117 #define BTRFS_EMPTY_DIR_SIZE 0
119 #define BTRFS_FT_UNKNOWN 0
120 #define BTRFS_FT_REG_FILE 1
121 #define BTRFS_FT_DIR 2
122 #define BTRFS_FT_CHRDEV 3
123 #define BTRFS_FT_BLKDEV 4
124 #define BTRFS_FT_FIFO 5
125 #define BTRFS_FT_SOCK 6
126 #define BTRFS_FT_SYMLINK 7
127 #define BTRFS_FT_XATTR 8
128 #define BTRFS_FT_MAX 9
131 * the key defines the order in the tree, and so it also defines (optimal)
132 * block layout. objectid corresonds to the inode number. The flags
133 * tells us things about the object, and is a kind of stream selector.
134 * so for a given inode, keys with flags of 1 might refer to the inode
135 * data, flags of 2 may point to file data in the btree and flags == 3
136 * may point to extents.
138 * offset is the starting byte offset for this key in the stream.
140 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
141 * in cpu native order. Otherwise they are identical and their sizes
142 * should be the same (ie both packed)
144 struct btrfs_disk_key
{
148 } __attribute__ ((__packed__
));
154 } __attribute__ ((__packed__
));
156 struct btrfs_mapping_tree
{
157 struct cache_tree cache_tree
;
160 #define BTRFS_UUID_SIZE 16
161 struct btrfs_dev_item
{
162 /* the internal btrfs device id */
165 /* size of the device */
171 /* optimal io alignment for this device */
174 /* optimal io width for this device */
177 /* minimal io size for this device */
180 /* type and info about this device */
183 /* expected generation for this device */
187 * starting byte of this partition on the device,
188 * to allowr for stripe alignment in the future
192 /* grouping information for allocation decisions */
195 /* seek speed 0-100 where 100 is fastest */
198 /* bandwidth 0-100 where 100 is fastest */
201 /* btrfs generated uuid for this device */
202 u8 uuid
[BTRFS_UUID_SIZE
];
204 /* uuid of FS who owns this device */
205 u8 fsid
[BTRFS_UUID_SIZE
];
206 } __attribute__ ((__packed__
));
208 struct btrfs_stripe
{
211 u8 dev_uuid
[BTRFS_UUID_SIZE
];
212 } __attribute__ ((__packed__
));
215 /* size of this chunk in bytes */
218 /* objectid of the root referencing this chunk */
224 /* optimal io alignment for this chunk */
227 /* optimal io width for this chunk */
230 /* minimal io size for this chunk */
233 /* 2^16 stripes is quite a lot, a second limit is the size of a single
238 /* sub stripes only matter for raid10 */
240 struct btrfs_stripe stripe
;
241 /* additional stripes go here */
242 } __attribute__ ((__packed__
));
244 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
246 BUG_ON(num_stripes
== 0);
247 return sizeof(struct btrfs_chunk
) +
248 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
251 #define BTRFS_FSID_SIZE 16
252 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
255 * every tree block (leaf or node) starts with this header.
257 struct btrfs_header
{
258 /* these first four must match the super block */
259 u8 csum
[BTRFS_CSUM_SIZE
];
260 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
261 __le64 bytenr
; /* which block this node is supposed to live in */
264 /* allowed to be different from the super from here on down */
265 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
270 } __attribute__ ((__packed__
));
272 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
273 sizeof(struct btrfs_header)) / \
274 sizeof(struct btrfs_key_ptr))
275 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
276 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
277 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
278 sizeof(struct btrfs_item) - \
279 sizeof(struct btrfs_file_extent_item))
281 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
282 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
285 * this is a very generous portion of the super block, giving us
286 * room to translate 14 chunks with 3 stripes each.
288 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
289 #define BTRFS_LABEL_SIZE 256
292 * the super block basically lists the main trees of the FS
293 * it currently lacks any block count etc etc
295 struct btrfs_super_block
{
296 u8 csum
[BTRFS_CSUM_SIZE
];
297 /* the first 3 fields must match struct btrfs_header */
298 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
299 __le64 bytenr
; /* this block number */
302 /* allowed to be different from the btrfs_header from here own down */
309 /* this will help find the new super based on the log root */
310 __le64 log_root_transid
;
313 __le64 root_dir_objectid
;
319 __le32 sys_chunk_array_size
;
320 __le64 chunk_root_generation
;
322 __le64 compat_ro_flags
;
323 __le64 incompat_flags
;
328 struct btrfs_dev_item dev_item
;
330 char label
[BTRFS_LABEL_SIZE
];
332 /* future expansion */
334 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
335 } __attribute__ ((__packed__
));
338 * Compat flags that we support. If any incompat flags are set other than the
339 * ones specified below then we will fail to mount
341 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
342 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
343 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
346 * A leaf is full of items. offset and size tell us where to find
347 * the item in the leaf (relative to the start of the data area)
350 struct btrfs_disk_key key
;
353 } __attribute__ ((__packed__
));
356 * leaves have an item area and a data area:
357 * [item0, item1....itemN] [free space] [dataN...data1, data0]
359 * The data is separate from the items to get the keys closer together
363 struct btrfs_header header
;
364 struct btrfs_item items
[];
365 } __attribute__ ((__packed__
));
368 * all non-leaf blocks are nodes, they hold only keys and pointers to
371 struct btrfs_key_ptr
{
372 struct btrfs_disk_key key
;
375 } __attribute__ ((__packed__
));
378 struct btrfs_header header
;
379 struct btrfs_key_ptr ptrs
[];
380 } __attribute__ ((__packed__
));
383 * btrfs_paths remember the path taken from the root down to the leaf.
384 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
385 * to any other levels that are present.
387 * The slots array records the index of the item or block pointer
388 * used while walking the tree.
391 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
392 int slots
[BTRFS_MAX_LEVEL
];
397 * set by btrfs_split_item, tells search_slot to keep all locks
398 * and to force calls to keep space in the nodes
400 int search_for_split
;
404 * items in the extent btree are used to record the objectid of the
405 * owner of the block and the number of references
407 struct btrfs_extent_item
{
409 } __attribute__ ((__packed__
));
411 struct btrfs_extent_ref
{
416 } __attribute__ ((__packed__
));
418 /* dev extents record free space on individual devices. The owner
419 * field points back to the chunk allocation mapping tree that allocated
420 * the extent. The chunk tree uuid field is a way to double check the owner
422 struct btrfs_dev_extent
{
424 __le64 chunk_objectid
;
427 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
428 } __attribute__ ((__packed__
));
430 struct btrfs_inode_ref
{
434 } __attribute__ ((__packed__
));
436 struct btrfs_timespec
{
439 } __attribute__ ((__packed__
));
442 BTRFS_COMPRESS_NONE
= 0,
443 BTRFS_COMPRESS_ZLIB
= 1,
444 BTRFS_COMPRESS_LAST
= 2,
445 } btrfs_compression_type
;
447 /* we don't understand any encryption methods right now */
449 BTRFS_ENCRYPTION_NONE
= 0,
450 BTRFS_ENCRYPTION_LAST
= 1,
451 } btrfs_encryption_type
;
453 struct btrfs_inode_item
{
454 /* nfs style generation number */
456 /* transid that last touched this inode */
468 /* modification sequence number for NFS */
472 * a little future expansion, for more than this we can
473 * just grow the inode item and version it
476 struct btrfs_timespec atime
;
477 struct btrfs_timespec ctime
;
478 struct btrfs_timespec mtime
;
479 struct btrfs_timespec otime
;
480 } __attribute__ ((__packed__
));
482 struct btrfs_dir_log_item
{
484 } __attribute__ ((__packed__
));
486 struct btrfs_dir_item
{
487 struct btrfs_disk_key location
;
492 } __attribute__ ((__packed__
));
494 struct btrfs_root_item
{
495 struct btrfs_inode_item inode
;
501 __le64 last_snapshot
;
504 struct btrfs_disk_key drop_progress
;
507 } __attribute__ ((__packed__
));
510 * this is used for both forward and backward root refs
512 struct btrfs_root_ref
{
516 } __attribute__ ((__packed__
));
518 #define BTRFS_FILE_EXTENT_INLINE 0
519 #define BTRFS_FILE_EXTENT_REG 1
520 #define BTRFS_FILE_EXTENT_PREALLOC 2
522 struct btrfs_file_extent_item
{
524 * transaction id that created this extent
528 * max number of bytes to hold this extent in ram
529 * when we split a compressed extent we can't know how big
530 * each of the resulting pieces will be. So, this is
531 * an upper limit on the size of the extent in ram instead of
537 * 32 bits for the various ways we might encode the data,
538 * including compression and encryption. If any of these
539 * are set to something a given disk format doesn't understand
540 * it is treated like an incompat flag for reading and writing,
545 __le16 other_encoding
; /* spare for later use */
547 /* are we inline data or a real extent? */
551 * disk space consumed by the extent, checksum blocks are included
555 __le64 disk_num_bytes
;
557 * the logical offset in file blocks (no csums)
558 * this extent record is for. This allows a file extent to point
559 * into the middle of an existing extent on disk, sharing it
560 * between two snapshots (useful if some bytes in the middle of the
561 * extent have changed
565 * the logical number of file blocks (no csums included)
569 } __attribute__ ((__packed__
));
571 struct btrfs_csum_item
{
573 } __attribute__ ((__packed__
));
575 /* tag for the radix tree of block groups in ram */
576 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
577 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
578 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
579 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
580 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
581 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
582 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
584 struct btrfs_block_group_item
{
586 __le64 chunk_objectid
;
588 } __attribute__ ((__packed__
));
590 struct btrfs_space_info
{
596 struct list_head list
;
599 struct btrfs_block_group_cache
{
600 struct cache_extent cache
;
601 struct btrfs_key key
;
602 struct btrfs_block_group_item item
;
603 struct btrfs_space_info
*space_info
;
610 struct btrfs_extent_ops
{
611 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
612 u64 hint_byte
, struct btrfs_key
*ins
);
613 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
618 struct btrfs_fs_devices
;
619 struct btrfs_fs_info
{
620 u8 fsid
[BTRFS_FSID_SIZE
];
621 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
622 struct btrfs_root
*fs_root
;
623 struct btrfs_root
*extent_root
;
624 struct btrfs_root
*tree_root
;
625 struct btrfs_root
*chunk_root
;
626 struct btrfs_root
*dev_root
;
627 struct btrfs_root
*csum_root
;
629 /* the log root tree is a directory of all the other log roots */
630 struct btrfs_root
*log_root_tree
;
632 struct extent_io_tree extent_cache
;
633 struct extent_io_tree free_space_cache
;
634 struct extent_io_tree block_group_cache
;
635 struct extent_io_tree pinned_extents
;
636 struct extent_io_tree pending_del
;
637 struct extent_io_tree extent_ins
;
639 /* logical->physical extent mapping */
640 struct btrfs_mapping_tree mapping_tree
;
643 u64 last_trans_committed
;
645 u64 avail_data_alloc_bits
;
646 u64 avail_metadata_alloc_bits
;
647 u64 avail_system_alloc_bits
;
648 u64 data_alloc_profile
;
649 u64 metadata_alloc_profile
;
650 u64 system_alloc_profile
;
653 struct btrfs_trans_handle
*running_transaction
;
654 struct btrfs_super_block super_copy
;
655 struct mutex fs_mutex
;
660 struct btrfs_extent_ops
*extent_ops
;
661 struct list_head dirty_cowonly_roots
;
663 struct btrfs_fs_devices
*fs_devices
;
664 struct list_head space_info
;
670 * in ram representation of the tree. extent_root is used for all allocations
671 * and for the extent tree extent_root root.
674 struct extent_buffer
*node
;
675 struct extent_buffer
*commit_root
;
676 struct btrfs_root_item root_item
;
677 struct btrfs_key root_key
;
678 struct btrfs_fs_info
*fs_info
;
682 /* data allocations are done in sectorsize units */
685 /* node allocations are done in nodesize units */
688 /* leaf allocations are done in leafsize units */
691 /* leaf allocations are done in leafsize units */
700 u64 last_inode_alloc
;
702 /* the dirty list is only used by non-reference counted roots */
703 struct list_head dirty_list
;
707 * inode items have the data typically returned from stat and store other
708 * info about object characteristics. There is one for every file and dir in
711 #define BTRFS_INODE_ITEM_KEY 1
712 #define BTRFS_INODE_REF_KEY 12
713 #define BTRFS_XATTR_ITEM_KEY 24
714 #define BTRFS_ORPHAN_ITEM_KEY 48
716 #define BTRFS_DIR_LOG_ITEM_KEY 60
717 #define BTRFS_DIR_LOG_INDEX_KEY 72
719 * dir items are the name -> inode pointers in a directory. There is one
720 * for every name in a directory.
722 #define BTRFS_DIR_ITEM_KEY 84
723 #define BTRFS_DIR_INDEX_KEY 96
726 * extent data is for file data
728 #define BTRFS_EXTENT_DATA_KEY 108
731 * csum items have the checksums for data in the extents
733 #define BTRFS_CSUM_ITEM_KEY 120
735 * extent csums are stored in a separate tree and hold csums for
736 * an entire extent on disk.
738 #define BTRFS_EXTENT_CSUM_KEY 128
741 * root items point to tree roots. There are typically in the root
742 * tree used by the super block to find all the other trees
744 #define BTRFS_ROOT_ITEM_KEY 132
747 * root backrefs tie subvols and snapshots to the directory entries that
750 #define BTRFS_ROOT_BACKREF_KEY 144
753 * root refs make a fast index for listing all of the snapshots and
754 * subvolumes referenced by a given root. They point directly to the
755 * directory item in the root that references the subvol
757 #define BTRFS_ROOT_REF_KEY 156
760 * extent items are in the extent map tree. These record which blocks
761 * are used, and how many references there are to each block
763 #define BTRFS_EXTENT_ITEM_KEY 168
764 #define BTRFS_EXTENT_REF_KEY 180
767 * block groups give us hints into the extent allocation trees. Which
768 * blocks are free etc etc
770 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
772 #define BTRFS_DEV_EXTENT_KEY 204
773 #define BTRFS_DEV_ITEM_KEY 216
774 #define BTRFS_CHUNK_ITEM_KEY 228
777 * string items are for debugging. They just store a short string of
780 #define BTRFS_STRING_ITEM_KEY 253
784 #define BTRFS_INODE_NODATASUM (1 << 0)
785 #define BTRFS_INODE_NODATACOW (1 << 1)
786 #define BTRFS_INODE_READONLY (1 << 2)
788 #define read_eb_member(eb, ptr, type, member, result) ( \
789 read_extent_buffer(eb, (char *)(result), \
790 ((unsigned long)(ptr)) + \
791 offsetof(type, member), \
792 sizeof(((type *)0)->member)))
794 #define write_eb_member(eb, ptr, type, member, result) ( \
795 write_extent_buffer(eb, (char *)(result), \
796 ((unsigned long)(ptr)) + \
797 offsetof(type, member), \
798 sizeof(((type *)0)->member)))
800 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
801 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
803 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
804 return le##bits##_to_cpu(h->member); \
806 static inline void btrfs_set_##name(struct extent_buffer *eb, \
809 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
810 h->member = cpu_to_le##bits(val); \
813 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
814 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
817 unsigned long offset = (unsigned long)s; \
818 type *p = (type *) (eb->data + offset); \
819 return le##bits##_to_cpu(p->member); \
821 static inline void btrfs_set_##name(struct extent_buffer *eb, \
822 type *s, u##bits val) \
824 unsigned long offset = (unsigned long)s; \
825 type *p = (type *) (eb->data + offset); \
826 p->member = cpu_to_le##bits(val); \
829 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
830 static inline u##bits btrfs_##name(type *s) \
832 return le##bits##_to_cpu(s->member); \
834 static inline void btrfs_set_##name(type *s, u##bits val) \
836 s->member = cpu_to_le##bits(val); \
839 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
840 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
841 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
842 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
843 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
844 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
846 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
847 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
848 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
849 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
850 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
851 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
853 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
854 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
856 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
858 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
860 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
862 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
864 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
865 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
867 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
869 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
871 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
874 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
876 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
879 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
881 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
884 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
885 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
886 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
887 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
888 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
889 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
890 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
891 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
892 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
893 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
894 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
896 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
898 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
901 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
902 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
903 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
905 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
907 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
909 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
911 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
912 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
914 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
916 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
917 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
919 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
922 unsigned long offset
= (unsigned long)c
;
923 offset
+= offsetof(struct btrfs_chunk
, stripe
);
924 offset
+= nr
* sizeof(struct btrfs_stripe
);
925 return (struct btrfs_stripe
*)offset
;
928 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
930 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
933 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
934 struct btrfs_chunk
*c
, int nr
)
936 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
939 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
940 struct btrfs_chunk
*c
, int nr
,
943 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
946 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
947 struct btrfs_chunk
*c
, int nr
)
949 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
952 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
953 struct btrfs_chunk
*c
, int nr
,
956 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
959 /* struct btrfs_block_group_item */
960 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
962 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
964 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
965 struct btrfs_block_group_item
, chunk_objectid
, 64);
967 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
968 struct btrfs_block_group_item
, chunk_objectid
, 64);
969 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
970 struct btrfs_block_group_item
, flags
, 64);
971 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
972 struct btrfs_block_group_item
, flags
, 64);
974 /* struct btrfs_inode_ref */
975 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
976 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
978 /* struct btrfs_inode_item */
979 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
980 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
981 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
982 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
983 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
984 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
985 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
986 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
987 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
988 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
989 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
990 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
992 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
993 struct btrfs_inode_item
, generation
, 64);
994 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
,
995 struct btrfs_inode_item
, generation
, 64);
996 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
997 struct btrfs_inode_item
, size
, 64);
998 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
999 struct btrfs_inode_item
, nbytes
, 64);
1000 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
1001 struct btrfs_inode_item
, block_group
, 64);
1002 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
1003 struct btrfs_inode_item
, nlink
, 32);
1004 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
1005 struct btrfs_inode_item
, uid
, 32);
1006 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
1007 struct btrfs_inode_item
, gid
, 32);
1008 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
1009 struct btrfs_inode_item
, mode
, 32);
1010 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
1011 struct btrfs_inode_item
, rdev
, 64);
1012 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
1013 struct btrfs_inode_item
, flags
, 64);
1015 static inline struct btrfs_timespec
*
1016 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1018 unsigned long ptr
= (unsigned long)inode_item
;
1019 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1020 return (struct btrfs_timespec
*)ptr
;
1023 static inline struct btrfs_timespec
*
1024 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1026 unsigned long ptr
= (unsigned long)inode_item
;
1027 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1028 return (struct btrfs_timespec
*)ptr
;
1031 static inline struct btrfs_timespec
*
1032 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1034 unsigned long ptr
= (unsigned long)inode_item
;
1035 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1036 return (struct btrfs_timespec
*)ptr
;
1039 static inline struct btrfs_timespec
*
1040 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1042 unsigned long ptr
= (unsigned long)inode_item
;
1043 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1044 return (struct btrfs_timespec
*)ptr
;
1047 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1048 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1049 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
1051 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
1054 /* struct btrfs_dev_extent */
1055 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1057 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1058 chunk_objectid
, 64);
1059 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1061 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1063 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1065 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1066 return (u8
*)((unsigned long)dev
+ ptr
);
1069 /* struct btrfs_extent_ref */
1070 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1071 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1072 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1073 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1075 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1076 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1078 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1080 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1083 /* struct btrfs_extent_item */
1084 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1085 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1088 /* struct btrfs_node */
1089 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1090 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1092 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1095 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1096 sizeof(struct btrfs_key_ptr
) * nr
;
1097 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1100 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1104 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1105 sizeof(struct btrfs_key_ptr
) * nr
;
1106 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1109 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1112 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1113 sizeof(struct btrfs_key_ptr
) * nr
;
1114 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1117 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1121 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1122 sizeof(struct btrfs_key_ptr
) * nr
;
1123 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1126 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1128 return offsetof(struct btrfs_node
, ptrs
) +
1129 sizeof(struct btrfs_key_ptr
) * nr
;
1132 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1133 struct btrfs_disk_key
*disk_key
, int nr
)
1136 ptr
= btrfs_node_key_ptr_offset(nr
);
1137 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1138 struct btrfs_key_ptr
, key
, disk_key
);
1141 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1142 struct btrfs_disk_key
*disk_key
, int nr
)
1145 ptr
= btrfs_node_key_ptr_offset(nr
);
1146 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1147 struct btrfs_key_ptr
, key
, disk_key
);
1150 /* struct btrfs_item */
1151 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1152 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1154 static inline unsigned long btrfs_item_nr_offset(int nr
)
1156 return offsetof(struct btrfs_leaf
, items
) +
1157 sizeof(struct btrfs_item
) * nr
;
1160 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1163 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1166 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1167 struct btrfs_item
*item
)
1169 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1172 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1174 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1177 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1179 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1182 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1184 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1187 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1188 struct btrfs_disk_key
*disk_key
, int nr
)
1190 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1191 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1194 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1195 struct btrfs_disk_key
*disk_key
, int nr
)
1197 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1198 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1201 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1204 * struct btrfs_root_ref
1206 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1207 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1208 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1210 /* struct btrfs_dir_item */
1211 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1212 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1213 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1214 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1216 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1217 struct btrfs_dir_item
*item
,
1218 struct btrfs_disk_key
*key
)
1220 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1223 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1224 struct btrfs_dir_item
*item
,
1225 struct btrfs_disk_key
*key
)
1227 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1230 /* struct btrfs_disk_key */
1231 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1233 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1234 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1236 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1237 struct btrfs_disk_key
*disk
)
1239 cpu
->offset
= le64_to_cpu(disk
->offset
);
1240 cpu
->type
= disk
->type
;
1241 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1244 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1245 struct btrfs_key
*cpu
)
1247 disk
->offset
= cpu_to_le64(cpu
->offset
);
1248 disk
->type
= cpu
->type
;
1249 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1252 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1253 struct btrfs_key
*key
, int nr
)
1255 struct btrfs_disk_key disk_key
;
1256 btrfs_node_key(eb
, &disk_key
, nr
);
1257 btrfs_disk_key_to_cpu(key
, &disk_key
);
1260 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1261 struct btrfs_key
*key
, int nr
)
1263 struct btrfs_disk_key disk_key
;
1264 btrfs_item_key(eb
, &disk_key
, nr
);
1265 btrfs_disk_key_to_cpu(key
, &disk_key
);
1268 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1269 struct btrfs_dir_item
*item
,
1270 struct btrfs_key
*key
)
1272 struct btrfs_disk_key disk_key
;
1273 btrfs_dir_item_key(eb
, item
, &disk_key
);
1274 btrfs_disk_key_to_cpu(key
, &disk_key
);
1278 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1283 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1288 /* struct btrfs_header */
1289 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1290 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1292 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1293 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1294 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1295 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1297 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1299 return (btrfs_header_flags(eb
) & flag
) == flag
;
1302 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1304 u64 flags
= btrfs_header_flags(eb
);
1305 btrfs_set_header_flags(eb
, flags
| flag
);
1306 return (flags
& flag
) == flag
;
1309 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1311 u64 flags
= btrfs_header_flags(eb
);
1312 btrfs_set_header_flags(eb
, flags
& ~flag
);
1313 return (flags
& flag
) == flag
;
1316 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1318 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1322 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1324 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1328 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1330 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1334 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1336 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1340 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1345 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1350 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1355 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1357 return (btrfs_header_level(eb
) == 0);
1360 /* struct btrfs_root_item */
1361 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1363 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1364 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1365 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1367 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1369 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1370 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1371 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1372 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1373 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1374 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1375 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1376 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1380 /* struct btrfs_super_block */
1382 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1383 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1384 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1386 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1387 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1388 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1389 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1390 struct btrfs_super_block
, chunk_root_generation
, 64);
1391 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1393 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1395 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1396 chunk_root_level
, 8);
1397 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1399 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1400 log_root_transid
, 64);
1401 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1403 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1405 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1407 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1409 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1411 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1413 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1415 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1416 root_dir_objectid
, 64);
1417 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1419 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1421 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1423 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1424 incompat_flags
, 64);
1425 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1428 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1430 int t
= btrfs_super_csum_type(s
);
1431 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1432 return btrfs_csum_sizes
[t
];
1435 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1437 return offsetof(struct btrfs_leaf
, items
);
1440 /* struct btrfs_file_extent_item */
1441 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1443 static inline unsigned long btrfs_file_extent_inline_start(struct
1444 btrfs_file_extent_item
*e
)
1446 unsigned long offset
= (unsigned long)e
;
1447 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1451 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1453 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1456 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1458 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1460 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1461 disk_num_bytes
, 64);
1462 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1464 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1466 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1468 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1470 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1472 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1473 other_encoding
, 16);
1475 /* this returns the number of file bytes represented by the inline item.
1476 * If an item is compressed, this is the uncompressed size
1478 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1479 struct btrfs_file_extent_item
*e
)
1481 return btrfs_file_extent_ram_bytes(eb
, e
);
1485 * this returns the number of bytes used by the item on disk, minus the
1486 * size of any extent headers. If a file is compressed on disk, this is
1487 * the compressed size
1489 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1490 struct btrfs_item
*e
)
1492 unsigned long offset
;
1493 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1494 return btrfs_item_size(eb
, e
) - offset
;
1497 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1499 return root
->leafsize
;
1500 return root
->nodesize
;
1503 /* helper function to cast into the data area of the leaf. */
1504 #define btrfs_item_ptr(leaf, slot, type) \
1505 ((type *)(btrfs_leaf_data(leaf) + \
1506 btrfs_item_offset_nr(leaf, slot)))
1508 #define btrfs_item_ptr_offset(leaf, slot) \
1509 ((unsigned long)(btrfs_leaf_data(leaf) + \
1510 btrfs_item_offset_nr(leaf, slot)))
1513 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1514 struct btrfs_root
*root
);
1515 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1516 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1517 btrfs_fs_info
*info
,
1519 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1520 struct btrfs_block_group_cache
1521 *hint
, u64 search_start
,
1522 int data
, int owner
);
1523 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1524 struct btrfs_root
*root
,
1525 u32 blocksize
, u64 parent
,
1531 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1532 struct btrfs_root
*root
,
1533 u64 num_bytes
, u64 parent
,
1534 u64 root_objectid
, u64 ref_generation
,
1535 u64 owner
, u64 empty_size
, u64 hint_byte
,
1536 u64 search_end
, struct btrfs_key
*ins
, int data
);
1537 int btrfs_lookup_extent_ref(struct btrfs_trans_handle
*trans
,
1538 struct btrfs_root
*root
, u64 bytenr
,
1539 u64 num_bytes
, u32
*refs
);
1540 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1541 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1543 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1544 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1545 struct extent_buffer
*buf
, int start_slot
, int nr
);
1546 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1547 *root
, u64 bytenr
, u64 num_bytes
, u64 parent
,
1548 u64 root_objectid
, u64 ref_generation
,
1549 u64 owner_objectid
, int pin
);
1550 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1551 struct btrfs_root
*root
,
1552 struct extent_io_tree
*unpin
);
1553 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1554 struct btrfs_root
*root
,
1555 u64 bytenr
, u64 num_bytes
, u64 parent
,
1556 u64 root_objectid
, u64 ref_generation
,
1557 u64 owner_objectid
);
1558 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1559 struct btrfs_root
*root
, u64 bytenr
,
1560 u64 orig_parent
, u64 parent
,
1561 u64 root_objectid
, u64 ref_generation
,
1562 u64 owner_objectid
);
1563 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1564 struct btrfs_root
*root
);
1565 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1566 int btrfs_read_block_groups(struct btrfs_root
*root
);
1567 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1568 struct btrfs_root
*root
, u64 bytes_used
,
1569 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1571 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
1572 struct btrfs_root
*root
);
1573 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
1574 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
1575 int alloc
, int mark_free
);
1577 int btrfs_previous_item(struct btrfs_root
*root
,
1578 struct btrfs_path
*path
, u64 min_objectid
,
1580 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
1581 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1582 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1583 struct extent_buffer
*parent
, int parent_slot
,
1584 struct extent_buffer
**cow_ret
);
1585 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1586 struct btrfs_root
*root
,
1587 struct extent_buffer
*buf
,
1588 struct extent_buffer
*parent
, int parent_slot
,
1589 struct extent_buffer
**cow_ret
,
1590 u64 search_start
, u64 empty_size
);
1591 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1592 struct btrfs_root
*root
,
1593 struct extent_buffer
*buf
,
1594 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1595 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1596 *root
, struct btrfs_path
*path
, u32 data_size
);
1597 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1598 struct btrfs_root
*root
,
1599 struct btrfs_path
*path
,
1600 u32 new_size
, int from_end
);
1601 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
1602 struct btrfs_root
*root
,
1603 struct btrfs_path
*path
,
1604 struct btrfs_key
*new_key
,
1605 unsigned long split_offset
);
1606 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1607 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1609 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1610 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1611 int start_slot
, int cache_only
, u64
*last_ret
,
1612 struct btrfs_key
*progress
);
1613 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1614 struct btrfs_path
*btrfs_alloc_path(void);
1615 void btrfs_free_path(struct btrfs_path
*p
);
1616 void btrfs_init_path(struct btrfs_path
*p
);
1617 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1618 struct btrfs_path
*path
, int slot
, int nr
);
1620 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1621 struct btrfs_root
*root
,
1622 struct btrfs_path
*path
)
1624 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1627 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1628 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1629 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1630 struct btrfs_root
*root
,
1631 struct btrfs_path
*path
,
1632 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1634 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1635 struct btrfs_root
*root
,
1636 struct btrfs_path
*path
,
1637 struct btrfs_key
*key
,
1640 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1643 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1644 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1645 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1646 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1648 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1649 struct btrfs_root
*root
, struct btrfs_path
*path
,
1650 struct btrfs_key
*new_key
);
1653 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
1654 struct btrfs_root
*tree_root
,
1655 u64 root_id
, u8 type
, u64 ref_id
,
1656 u64 dirid
, u64 sequence
,
1657 const char *name
, int name_len
);
1658 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1659 struct btrfs_key
*key
);
1660 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1661 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1663 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1664 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1666 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1667 btrfs_root_item
*item
, struct btrfs_key
*key
);
1668 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1669 struct btrfs_root
*latest_root
);
1671 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1672 *root
, const char *name
, int name_len
, u64 dir
,
1673 struct btrfs_key
*location
, u8 type
, u64 index
);
1674 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1675 struct btrfs_root
*root
,
1676 struct btrfs_path
*path
, u64 dir
,
1677 const char *name
, int name_len
,
1679 struct btrfs_dir_item
*
1680 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1681 struct btrfs_root
*root
,
1682 struct btrfs_path
*path
, u64 dir
,
1683 u64 objectid
, const char *name
, int name_len
,
1685 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1686 struct btrfs_path
*path
,
1687 const char *name
, int name_len
);
1688 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1689 struct btrfs_root
*root
,
1690 struct btrfs_path
*path
,
1691 struct btrfs_dir_item
*di
);
1692 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1693 struct btrfs_root
*root
, const char *name
,
1694 u16 name_len
, const void *data
, u16 data_len
,
1696 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1697 struct btrfs_root
*root
,
1698 struct btrfs_path
*path
, u64 dir
,
1699 const char *name
, u16 name_len
,
1702 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1703 struct btrfs_root
*fs_root
,
1704 u64 dirid
, u64
*objectid
);
1705 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1708 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1709 struct btrfs_root
*root
,
1710 const char *name
, int name_len
,
1711 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1712 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1713 struct btrfs_root
*root
,
1714 const char *name
, int name_len
,
1715 u64 inode_objectid
, u64 ref_objectid
);
1716 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1717 struct btrfs_root
*root
,
1718 struct btrfs_path
*path
, u64 objectid
);
1719 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1720 *root
, u64 objectid
, struct btrfs_inode_item
1722 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1723 *root
, struct btrfs_path
*path
,
1724 struct btrfs_key
*location
, int mod
);
1727 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
1728 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
1729 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1730 struct btrfs_root
*root
,
1731 u64 objectid
, u64 pos
, u64 offset
,
1734 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
1735 struct btrfs_root
*root
, u64 objectid
,
1736 u64 offset
, char *buffer
, size_t size
);
1737 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1738 struct btrfs_root
*root
,
1739 struct btrfs_path
*path
, u64 objectid
,
1740 u64 bytenr
, int mod
);
1741 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
1742 struct btrfs_root
*root
, u64 alloc_end
,
1743 u64 bytenr
, char *data
, size_t len
);
1744 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1745 struct btrfs_root
*root
,
1746 struct btrfs_path
*path
,
1747 u64 bytenr
, int cow
);
1748 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1749 struct btrfs_root
*root
, struct btrfs_path
*path
,