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
];
398 * items in the extent btree are used to record the objectid of the
399 * owner of the block and the number of references
401 struct btrfs_extent_item
{
403 } __attribute__ ((__packed__
));
405 struct btrfs_extent_ref
{
410 } __attribute__ ((__packed__
));
412 /* dev extents record free space on individual devices. The owner
413 * field points back to the chunk allocation mapping tree that allocated
414 * the extent. The chunk tree uuid field is a way to double check the owner
416 struct btrfs_dev_extent
{
418 __le64 chunk_objectid
;
421 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
422 } __attribute__ ((__packed__
));
424 struct btrfs_inode_ref
{
428 } __attribute__ ((__packed__
));
430 struct btrfs_timespec
{
433 } __attribute__ ((__packed__
));
436 BTRFS_COMPRESS_NONE
= 0,
437 BTRFS_COMPRESS_ZLIB
= 1,
438 BTRFS_COMPRESS_LAST
= 2,
439 } btrfs_compression_type
;
441 /* we don't understand any encryption methods right now */
443 BTRFS_ENCRYPTION_NONE
= 0,
444 BTRFS_ENCRYPTION_LAST
= 1,
445 } btrfs_encryption_type
;
447 struct btrfs_inode_item
{
448 /* nfs style generation number */
450 /* transid that last touched this inode */
462 /* modification sequence number for NFS */
466 * a little future expansion, for more than this we can
467 * just grow the inode item and version it
470 struct btrfs_timespec atime
;
471 struct btrfs_timespec ctime
;
472 struct btrfs_timespec mtime
;
473 struct btrfs_timespec otime
;
474 } __attribute__ ((__packed__
));
476 struct btrfs_dir_item
{
477 struct btrfs_disk_key location
;
482 } __attribute__ ((__packed__
));
484 struct btrfs_root_item
{
485 struct btrfs_inode_item inode
;
491 __le64 last_snapshot
;
494 struct btrfs_disk_key drop_progress
;
497 } __attribute__ ((__packed__
));
500 * this is used for both forward and backward root refs
502 struct btrfs_root_ref
{
506 } __attribute__ ((__packed__
));
508 #define BTRFS_FILE_EXTENT_INLINE 0
509 #define BTRFS_FILE_EXTENT_REG 1
510 #define BTRFS_FILE_EXTENT_PREALLOC 2
512 struct btrfs_file_extent_item
{
514 * transaction id that created this extent
518 * max number of bytes to hold this extent in ram
519 * when we split a compressed extent we can't know how big
520 * each of the resulting pieces will be. So, this is
521 * an upper limit on the size of the extent in ram instead of
527 * 32 bits for the various ways we might encode the data,
528 * including compression and encryption. If any of these
529 * are set to something a given disk format doesn't understand
530 * it is treated like an incompat flag for reading and writing,
535 __le16 other_encoding
; /* spare for later use */
537 /* are we inline data or a real extent? */
541 * disk space consumed by the extent, checksum blocks are included
545 __le64 disk_num_bytes
;
547 * the logical offset in file blocks (no csums)
548 * this extent record is for. This allows a file extent to point
549 * into the middle of an existing extent on disk, sharing it
550 * between two snapshots (useful if some bytes in the middle of the
551 * extent have changed
555 * the logical number of file blocks (no csums included)
559 } __attribute__ ((__packed__
));
561 struct btrfs_csum_item
{
563 } __attribute__ ((__packed__
));
565 /* tag for the radix tree of block groups in ram */
566 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
567 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
568 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
569 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
570 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
571 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
572 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
574 struct btrfs_block_group_item
{
576 __le64 chunk_objectid
;
578 } __attribute__ ((__packed__
));
580 struct btrfs_space_info
{
586 struct list_head list
;
589 struct btrfs_block_group_cache
{
590 struct cache_extent cache
;
591 struct btrfs_key key
;
592 struct btrfs_block_group_item item
;
593 struct btrfs_space_info
*space_info
;
600 struct btrfs_extent_ops
{
601 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
602 u64 hint_byte
, struct btrfs_key
*ins
);
603 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
608 struct btrfs_fs_devices
;
609 struct btrfs_fs_info
{
610 u8 fsid
[BTRFS_FSID_SIZE
];
611 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
612 struct btrfs_root
*fs_root
;
613 struct btrfs_root
*extent_root
;
614 struct btrfs_root
*tree_root
;
615 struct btrfs_root
*chunk_root
;
616 struct btrfs_root
*dev_root
;
617 struct btrfs_root
*csum_root
;
619 /* the log root tree is a directory of all the other log roots */
620 struct btrfs_root
*log_root_tree
;
622 struct extent_io_tree extent_cache
;
623 struct extent_io_tree free_space_cache
;
624 struct extent_io_tree block_group_cache
;
625 struct extent_io_tree pinned_extents
;
626 struct extent_io_tree pending_del
;
627 struct extent_io_tree extent_ins
;
629 /* logical->physical extent mapping */
630 struct btrfs_mapping_tree mapping_tree
;
633 u64 last_trans_committed
;
635 u64 avail_data_alloc_bits
;
636 u64 avail_metadata_alloc_bits
;
637 u64 avail_system_alloc_bits
;
638 u64 data_alloc_profile
;
639 u64 metadata_alloc_profile
;
640 u64 system_alloc_profile
;
643 struct btrfs_trans_handle
*running_transaction
;
644 struct btrfs_super_block super_copy
;
645 struct extent_buffer
*sb_buffer
;
646 struct mutex fs_mutex
;
649 struct btrfs_extent_ops
*extent_ops
;
650 struct list_head dirty_cowonly_roots
;
652 struct btrfs_fs_devices
*fs_devices
;
653 struct list_head space_info
;
659 * in ram representation of the tree. extent_root is used for all allocations
660 * and for the extent tree extent_root root.
663 struct extent_buffer
*node
;
664 struct extent_buffer
*commit_root
;
665 struct btrfs_root_item root_item
;
666 struct btrfs_key root_key
;
667 struct btrfs_fs_info
*fs_info
;
671 /* data allocations are done in sectorsize units */
674 /* node allocations are done in nodesize units */
677 /* leaf allocations are done in leafsize units */
680 /* leaf allocations are done in leafsize units */
689 u64 last_inode_alloc
;
691 /* the dirty list is only used by non-reference counted roots */
692 struct list_head dirty_list
;
696 * inode items have the data typically returned from stat and store other
697 * info about object characteristics. There is one for every file and dir in
700 #define BTRFS_INODE_ITEM_KEY 1
701 #define BTRFS_INODE_REF_KEY 12
702 #define BTRFS_XATTR_ITEM_KEY 24
703 #define BTRFS_ORPHAN_ITEM_KEY 48
705 #define BTRFS_DIR_LOG_ITEM_KEY 60
706 #define BTRFS_DIR_LOG_INDEX_KEY 72
708 * dir items are the name -> inode pointers in a directory. There is one
709 * for every name in a directory.
711 #define BTRFS_DIR_ITEM_KEY 84
712 #define BTRFS_DIR_INDEX_KEY 96
715 * extent data is for file data
717 #define BTRFS_EXTENT_DATA_KEY 108
720 * csum items have the checksums for data in the extents
722 #define BTRFS_CSUM_ITEM_KEY 120
724 * extent csums are stored in a separate tree and hold csums for
725 * an entire extent on disk.
727 #define BTRFS_EXTENT_CSUM_KEY 128
730 * root items point to tree roots. There are typically in the root
731 * tree used by the super block to find all the other trees
733 #define BTRFS_ROOT_ITEM_KEY 132
736 * root backrefs tie subvols and snapshots to the directory entries that
739 #define BTRFS_ROOT_BACKREF_KEY 144
742 * root refs make a fast index for listing all of the snapshots and
743 * subvolumes referenced by a given root. They point directly to the
744 * directory item in the root that references the subvol
746 #define BTRFS_ROOT_REF_KEY 156
749 * extent items are in the extent map tree. These record which blocks
750 * are used, and how many references there are to each block
752 #define BTRFS_EXTENT_ITEM_KEY 168
753 #define BTRFS_EXTENT_REF_KEY 180
756 * block groups give us hints into the extent allocation trees. Which
757 * blocks are free etc etc
759 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
761 #define BTRFS_DEV_EXTENT_KEY 204
762 #define BTRFS_DEV_ITEM_KEY 216
763 #define BTRFS_CHUNK_ITEM_KEY 228
766 * string items are for debugging. They just store a short string of
769 #define BTRFS_STRING_ITEM_KEY 253
773 #define BTRFS_INODE_NODATASUM (1 << 0)
774 #define BTRFS_INODE_NODATACOW (1 << 1)
775 #define BTRFS_INODE_READONLY (1 << 2)
777 #define read_eb_member(eb, ptr, type, member, result) ( \
778 read_extent_buffer(eb, (char *)(result), \
779 ((unsigned long)(ptr)) + \
780 offsetof(type, member), \
781 sizeof(((type *)0)->member)))
783 #define write_eb_member(eb, ptr, type, member, result) ( \
784 write_extent_buffer(eb, (char *)(result), \
785 ((unsigned long)(ptr)) + \
786 offsetof(type, member), \
787 sizeof(((type *)0)->member)))
789 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
790 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
792 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
793 return le##bits##_to_cpu(h->member); \
795 static inline void btrfs_set_##name(struct extent_buffer *eb, \
798 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
799 h->member = cpu_to_le##bits(val); \
802 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
803 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
806 unsigned long offset = (unsigned long)s; \
807 type *p = (type *) (eb->data + offset); \
808 return le##bits##_to_cpu(p->member); \
810 static inline void btrfs_set_##name(struct extent_buffer *eb, \
811 type *s, u##bits val) \
813 unsigned long offset = (unsigned long)s; \
814 type *p = (type *) (eb->data + offset); \
815 p->member = cpu_to_le##bits(val); \
818 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
819 static inline u##bits btrfs_##name(type *s) \
821 return le##bits##_to_cpu(s->member); \
823 static inline void btrfs_set_##name(type *s, u##bits val) \
825 s->member = cpu_to_le##bits(val); \
828 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
829 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
830 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
831 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
832 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
833 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
835 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
836 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
837 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
838 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
839 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
840 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
842 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
843 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
845 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
847 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
849 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
851 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
853 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
854 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
856 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
858 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
860 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
863 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
865 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
868 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
870 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
873 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
874 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
875 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
876 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
877 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
878 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
879 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
880 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
881 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
882 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
883 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
885 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
887 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
890 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
891 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
892 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
894 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
896 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
898 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
900 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
901 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
903 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
905 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
906 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
908 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
911 unsigned long offset
= (unsigned long)c
;
912 offset
+= offsetof(struct btrfs_chunk
, stripe
);
913 offset
+= nr
* sizeof(struct btrfs_stripe
);
914 return (struct btrfs_stripe
*)offset
;
917 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
919 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
922 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
923 struct btrfs_chunk
*c
, int nr
)
925 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
928 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
929 struct btrfs_chunk
*c
, int nr
,
932 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
935 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
936 struct btrfs_chunk
*c
, int nr
)
938 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
941 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
942 struct btrfs_chunk
*c
, int nr
,
945 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
948 /* struct btrfs_block_group_item */
949 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
951 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
953 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
954 struct btrfs_block_group_item
, chunk_objectid
, 64);
956 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
957 struct btrfs_block_group_item
, chunk_objectid
, 64);
958 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
959 struct btrfs_block_group_item
, flags
, 64);
960 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
961 struct btrfs_block_group_item
, flags
, 64);
963 /* struct btrfs_inode_ref */
964 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
965 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
967 /* struct btrfs_inode_item */
968 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
969 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
970 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
971 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
972 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
973 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
974 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
975 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
976 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
977 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
978 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
979 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
981 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
982 struct btrfs_inode_item
, generation
, 64);
983 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
,
984 struct btrfs_inode_item
, generation
, 64);
985 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
986 struct btrfs_inode_item
, size
, 64);
987 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
988 struct btrfs_inode_item
, nbytes
, 64);
989 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
990 struct btrfs_inode_item
, block_group
, 64);
991 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
992 struct btrfs_inode_item
, nlink
, 32);
993 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
994 struct btrfs_inode_item
, uid
, 32);
995 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
996 struct btrfs_inode_item
, gid
, 32);
997 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
998 struct btrfs_inode_item
, mode
, 32);
999 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
1000 struct btrfs_inode_item
, rdev
, 64);
1001 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
1002 struct btrfs_inode_item
, flags
, 64);
1004 static inline struct btrfs_timespec
*
1005 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1007 unsigned long ptr
= (unsigned long)inode_item
;
1008 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1009 return (struct btrfs_timespec
*)ptr
;
1012 static inline struct btrfs_timespec
*
1013 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1015 unsigned long ptr
= (unsigned long)inode_item
;
1016 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1017 return (struct btrfs_timespec
*)ptr
;
1020 static inline struct btrfs_timespec
*
1021 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1023 unsigned long ptr
= (unsigned long)inode_item
;
1024 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1025 return (struct btrfs_timespec
*)ptr
;
1028 static inline struct btrfs_timespec
*
1029 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1031 unsigned long ptr
= (unsigned long)inode_item
;
1032 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1033 return (struct btrfs_timespec
*)ptr
;
1036 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1037 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1038 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
1040 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
1043 /* struct btrfs_dev_extent */
1044 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1046 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1047 chunk_objectid
, 64);
1048 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1050 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1052 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1054 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1055 return (u8
*)((unsigned long)dev
+ ptr
);
1058 /* struct btrfs_extent_ref */
1059 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1060 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1061 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1062 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1064 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1065 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1067 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1069 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1072 /* struct btrfs_extent_item */
1073 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1074 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1077 /* struct btrfs_node */
1078 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1079 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1081 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1084 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1085 sizeof(struct btrfs_key_ptr
) * nr
;
1086 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1089 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1093 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1094 sizeof(struct btrfs_key_ptr
) * nr
;
1095 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1098 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1101 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1102 sizeof(struct btrfs_key_ptr
) * nr
;
1103 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1106 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1110 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1111 sizeof(struct btrfs_key_ptr
) * nr
;
1112 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1115 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1117 return offsetof(struct btrfs_node
, ptrs
) +
1118 sizeof(struct btrfs_key_ptr
) * nr
;
1121 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1122 struct btrfs_disk_key
*disk_key
, int nr
)
1125 ptr
= btrfs_node_key_ptr_offset(nr
);
1126 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1127 struct btrfs_key_ptr
, key
, disk_key
);
1130 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1131 struct btrfs_disk_key
*disk_key
, int nr
)
1134 ptr
= btrfs_node_key_ptr_offset(nr
);
1135 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1136 struct btrfs_key_ptr
, key
, disk_key
);
1139 /* struct btrfs_item */
1140 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1141 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1143 static inline unsigned long btrfs_item_nr_offset(int nr
)
1145 return offsetof(struct btrfs_leaf
, items
) +
1146 sizeof(struct btrfs_item
) * nr
;
1149 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1152 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1155 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1156 struct btrfs_item
*item
)
1158 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1161 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1163 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1166 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1168 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1171 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1173 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1176 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1177 struct btrfs_disk_key
*disk_key
, int nr
)
1179 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1180 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1183 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1184 struct btrfs_disk_key
*disk_key
, int nr
)
1186 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1187 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1191 * struct btrfs_root_ref
1193 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1194 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1195 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1197 /* struct btrfs_dir_item */
1198 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1199 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1200 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1201 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1203 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1204 struct btrfs_dir_item
*item
,
1205 struct btrfs_disk_key
*key
)
1207 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1210 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1211 struct btrfs_dir_item
*item
,
1212 struct btrfs_disk_key
*key
)
1214 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1217 /* struct btrfs_disk_key */
1218 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1220 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1221 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1223 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1224 struct btrfs_disk_key
*disk
)
1226 cpu
->offset
= le64_to_cpu(disk
->offset
);
1227 cpu
->type
= disk
->type
;
1228 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1231 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1232 struct btrfs_key
*cpu
)
1234 disk
->offset
= cpu_to_le64(cpu
->offset
);
1235 disk
->type
= cpu
->type
;
1236 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1239 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1240 struct btrfs_key
*key
, int nr
)
1242 struct btrfs_disk_key disk_key
;
1243 btrfs_node_key(eb
, &disk_key
, nr
);
1244 btrfs_disk_key_to_cpu(key
, &disk_key
);
1247 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1248 struct btrfs_key
*key
, int nr
)
1250 struct btrfs_disk_key disk_key
;
1251 btrfs_item_key(eb
, &disk_key
, nr
);
1252 btrfs_disk_key_to_cpu(key
, &disk_key
);
1255 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1256 struct btrfs_dir_item
*item
,
1257 struct btrfs_key
*key
)
1259 struct btrfs_disk_key disk_key
;
1260 btrfs_dir_item_key(eb
, item
, &disk_key
);
1261 btrfs_disk_key_to_cpu(key
, &disk_key
);
1265 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1270 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1275 /* struct btrfs_header */
1276 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1277 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1279 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1280 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1281 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1282 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1284 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1286 return (btrfs_header_flags(eb
) & flag
) == flag
;
1289 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1291 u64 flags
= btrfs_header_flags(eb
);
1292 btrfs_set_header_flags(eb
, flags
| flag
);
1293 return (flags
& flag
) == flag
;
1296 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1298 u64 flags
= btrfs_header_flags(eb
);
1299 btrfs_set_header_flags(eb
, flags
& ~flag
);
1300 return (flags
& flag
) == flag
;
1303 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1305 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1309 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1311 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1315 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1317 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1321 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1323 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1327 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1332 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1337 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1342 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1344 return (btrfs_header_level(eb
) == 0);
1347 /* struct btrfs_root_item */
1348 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1350 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1351 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1352 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1354 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1356 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1357 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1358 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1359 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1360 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1361 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1362 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1363 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1367 /* struct btrfs_super_block */
1369 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1370 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1371 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1373 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1374 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1375 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1376 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1377 struct btrfs_super_block
, chunk_root_generation
, 64);
1378 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1380 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1382 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1383 chunk_root_level
, 8);
1384 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1386 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1387 log_root_transid
, 64);
1388 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1390 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1392 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1394 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1396 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1398 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1400 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1402 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1403 root_dir_objectid
, 64);
1404 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1406 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1408 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1410 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1411 incompat_flags
, 64);
1412 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1415 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1417 int t
= btrfs_super_csum_type(s
);
1418 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1419 return btrfs_csum_sizes
[t
];
1422 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1424 return offsetof(struct btrfs_leaf
, items
);
1427 /* struct btrfs_file_extent_item */
1428 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1430 static inline unsigned long btrfs_file_extent_inline_start(struct
1431 btrfs_file_extent_item
*e
)
1433 unsigned long offset
= (unsigned long)e
;
1434 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1438 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1440 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1443 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1445 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1447 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1448 disk_num_bytes
, 64);
1449 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1451 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1453 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1455 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1457 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1459 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1460 other_encoding
, 16);
1462 /* this returns the number of file bytes represented by the inline item.
1463 * If an item is compressed, this is the uncompressed size
1465 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1466 struct btrfs_file_extent_item
*e
)
1468 return btrfs_file_extent_ram_bytes(eb
, e
);
1472 * this returns the number of bytes used by the item on disk, minus the
1473 * size of any extent headers. If a file is compressed on disk, this is
1474 * the compressed size
1476 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1477 struct btrfs_item
*e
)
1479 unsigned long offset
;
1480 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1481 return btrfs_item_size(eb
, e
) - offset
;
1484 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1486 return root
->leafsize
;
1487 return root
->nodesize
;
1490 /* helper function to cast into the data area of the leaf. */
1491 #define btrfs_item_ptr(leaf, slot, type) \
1492 ((type *)(btrfs_leaf_data(leaf) + \
1493 btrfs_item_offset_nr(leaf, slot)))
1495 #define btrfs_item_ptr_offset(leaf, slot) \
1496 ((unsigned long)(btrfs_leaf_data(leaf) + \
1497 btrfs_item_offset_nr(leaf, slot)))
1500 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1501 struct btrfs_root
*root
);
1502 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1503 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1504 btrfs_fs_info
*info
,
1506 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1507 struct btrfs_block_group_cache
1508 *hint
, u64 search_start
,
1509 int data
, int owner
);
1510 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1511 struct btrfs_root
*root
,
1512 u32 blocksize
, u64 parent
,
1518 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1519 struct btrfs_root
*root
,
1520 u64 num_bytes
, u64 parent
,
1521 u64 root_objectid
, u64 ref_generation
,
1522 u64 owner
, u64 empty_size
, u64 hint_byte
,
1523 u64 search_end
, struct btrfs_key
*ins
, int data
);
1524 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1525 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1527 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1528 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1529 struct extent_buffer
*buf
, int start_slot
, int nr
);
1530 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1531 *root
, u64 bytenr
, u64 num_bytes
, u64 parent
,
1532 u64 root_objectid
, u64 ref_generation
,
1533 u64 owner_objectid
, int pin
);
1534 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1535 struct btrfs_root
*root
,
1536 struct extent_io_tree
*unpin
);
1537 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1538 struct btrfs_root
*root
,
1539 u64 bytenr
, u64 num_bytes
, u64 parent
,
1540 u64 root_objectid
, u64 ref_generation
,
1541 u64 owner_objectid
);
1542 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1543 struct btrfs_root
*root
, u64 bytenr
,
1544 u64 orig_parent
, u64 parent
,
1545 u64 root_objectid
, u64 ref_generation
,
1546 u64 owner_objectid
);
1547 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1548 struct btrfs_root
*root
);
1549 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1550 int btrfs_read_block_groups(struct btrfs_root
*root
);
1551 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1552 struct btrfs_root
*root
, u64 bytes_used
,
1553 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1555 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
1556 struct btrfs_root
*root
);
1557 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
1558 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
1559 int alloc
, int mark_free
);
1561 int btrfs_previous_item(struct btrfs_root
*root
,
1562 struct btrfs_path
*path
, u64 min_objectid
,
1564 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
1565 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1566 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1567 struct extent_buffer
*parent
, int parent_slot
,
1568 struct extent_buffer
**cow_ret
);
1569 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1570 struct btrfs_root
*root
,
1571 struct extent_buffer
*buf
,
1572 struct extent_buffer
*parent
, int parent_slot
,
1573 struct extent_buffer
**cow_ret
,
1574 u64 search_start
, u64 empty_size
);
1575 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1576 struct btrfs_root
*root
,
1577 struct extent_buffer
*buf
,
1578 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1579 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1580 *root
, struct btrfs_path
*path
, u32 data_size
);
1581 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1582 struct btrfs_root
*root
,
1583 struct btrfs_path
*path
,
1584 u32 new_size
, int from_end
);
1585 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1586 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1588 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1589 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1590 int start_slot
, int cache_only
, u64
*last_ret
,
1591 struct btrfs_key
*progress
);
1592 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1593 struct btrfs_path
*btrfs_alloc_path(void);
1594 void btrfs_free_path(struct btrfs_path
*p
);
1595 void btrfs_init_path(struct btrfs_path
*p
);
1596 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1597 struct btrfs_path
*path
, int slot
, int nr
);
1599 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1600 struct btrfs_root
*root
,
1601 struct btrfs_path
*path
)
1603 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1606 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1607 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1608 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1609 struct btrfs_root
*root
,
1610 struct btrfs_path
*path
,
1611 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1613 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1614 struct btrfs_root
*root
,
1615 struct btrfs_path
*path
,
1616 struct btrfs_key
*key
,
1619 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1622 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1623 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1624 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1625 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1627 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1628 struct btrfs_root
*root
, struct btrfs_path
*path
,
1629 struct btrfs_key
*new_key
);
1632 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1633 struct btrfs_key
*key
);
1634 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1635 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1637 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1638 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1640 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1641 btrfs_root_item
*item
, struct btrfs_key
*key
);
1642 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1643 struct btrfs_root
*latest_root
);
1645 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1646 *root
, const char *name
, int name_len
, u64 dir
,
1647 struct btrfs_key
*location
, u8 type
);
1648 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1649 struct btrfs_root
*root
,
1650 struct btrfs_path
*path
, u64 dir
,
1651 const char *name
, int name_len
,
1653 struct btrfs_dir_item
*
1654 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1655 struct btrfs_root
*root
,
1656 struct btrfs_path
*path
, u64 dir
,
1657 u64 objectid
, const char *name
, int name_len
,
1659 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1660 struct btrfs_path
*path
,
1661 const char *name
, int name_len
);
1662 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1663 struct btrfs_root
*root
,
1664 struct btrfs_path
*path
,
1665 struct btrfs_dir_item
*di
);
1666 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1667 struct btrfs_root
*root
, const char *name
,
1668 u16 name_len
, const void *data
, u16 data_len
,
1670 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1671 struct btrfs_root
*root
,
1672 struct btrfs_path
*path
, u64 dir
,
1673 const char *name
, u16 name_len
,
1676 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1677 struct btrfs_root
*fs_root
,
1678 u64 dirid
, u64
*objectid
);
1679 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1682 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1683 struct btrfs_root
*root
,
1684 const char *name
, int name_len
,
1685 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1686 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1687 struct btrfs_root
*root
,
1688 const char *name
, int name_len
,
1689 u64 inode_objectid
, u64 ref_objectid
);
1690 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1691 struct btrfs_root
*root
,
1692 struct btrfs_path
*path
, u64 objectid
);
1693 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1694 *root
, u64 objectid
, struct btrfs_inode_item
1696 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1697 *root
, struct btrfs_path
*path
,
1698 struct btrfs_key
*location
, int mod
);
1701 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1702 struct btrfs_root
*root
,
1703 u64 objectid
, u64 pos
, u64 offset
,
1706 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
1707 struct btrfs_root
*root
, u64 objectid
,
1708 u64 offset
, char *buffer
, size_t size
);
1709 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1710 struct btrfs_root
*root
,
1711 struct btrfs_path
*path
, u64 objectid
,
1712 u64 bytenr
, int mod
);
1713 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
1714 struct btrfs_root
*root
,
1715 struct btrfs_inode_item
*inode
,
1716 u64 objectid
, u64 offset
,
1717 char *data
, size_t len
);
1718 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1719 struct btrfs_root
*root
,
1720 struct btrfs_path
*path
,
1721 u64 objectid
, u64 offset
,
1723 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1724 struct btrfs_root
*root
, struct btrfs_path
*path
,