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 "_BDRfS_M"
32 #define BTRFS_MAX_LEVEL 8
34 /* holds pointers to all of the tree roots */
35 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
37 /* stores information about which extents are in use, and reference counts */
38 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
41 * chunk tree stores translations from logical -> physical block numbering
42 * the super block points to the chunk tree
44 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
47 * stores information about which areas of a given device are in use.
48 * one per device. The tree of tree roots points to the device tree
50 #define BTRFS_DEV_TREE_OBJECTID 4ULL
52 /* one per subvolume, storing files and directories */
53 #define BTRFS_FS_TREE_OBJECTID 5ULL
55 /* directory objectid inside the root tree */
56 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
58 /* oprhan objectid for tracking unlinked/truncated files */
59 #define BTRFS_ORPHAN_OBJECTID -5ULL
61 /* does write ahead logging to speed up fsyncs */
62 #define BTRFS_TREE_LOG_OBJECTID -6ULL
63 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
66 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
67 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
69 /* dummy objectid represents multiple objectids */
70 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
73 * All files have objectids in this range.
75 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
76 #define BTRFS_LAST_FREE_OBJECTID -256ULL
77 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
82 * the device items go into the chunk tree. The key is in the form
83 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
85 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
88 * we can actually store much bigger names, but lets not confuse the rest
91 #define BTRFS_NAME_LEN 255
93 /* 32 bytes in various csum fields */
94 #define BTRFS_CSUM_SIZE 32
95 /* four bytes for CRC32 */
96 #define BTRFS_CRC32_SIZE 4
97 #define BTRFS_EMPTY_DIR_SIZE 0
99 #define BTRFS_FT_UNKNOWN 0
100 #define BTRFS_FT_REG_FILE 1
101 #define BTRFS_FT_DIR 2
102 #define BTRFS_FT_CHRDEV 3
103 #define BTRFS_FT_BLKDEV 4
104 #define BTRFS_FT_FIFO 5
105 #define BTRFS_FT_SOCK 6
106 #define BTRFS_FT_SYMLINK 7
107 #define BTRFS_FT_XATTR 8
108 #define BTRFS_FT_MAX 9
111 * the key defines the order in the tree, and so it also defines (optimal)
112 * block layout. objectid corresonds to the inode number. The flags
113 * tells us things about the object, and is a kind of stream selector.
114 * so for a given inode, keys with flags of 1 might refer to the inode
115 * data, flags of 2 may point to file data in the btree and flags == 3
116 * may point to extents.
118 * offset is the starting byte offset for this key in the stream.
120 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
121 * in cpu native order. Otherwise they are identical and their sizes
122 * should be the same (ie both packed)
124 struct btrfs_disk_key {
128 } __attribute__ ((__packed__));
134 } __attribute__ ((__packed__));
136 struct btrfs_mapping_tree {
137 struct cache_tree cache_tree;
140 #define BTRFS_UUID_SIZE 16
141 struct btrfs_dev_item {
142 /* the internal btrfs device id */
145 /* size of the device */
151 /* optimal io alignment for this device */
154 /* optimal io width for this device */
157 /* minimal io size for this device */
160 /* type and info about this device */
163 /* expected generation for this device */
166 /* grouping information for allocation decisions */
169 /* seek speed 0-100 where 100 is fastest */
172 /* bandwidth 0-100 where 100 is fastest */
175 /* btrfs generated uuid for this device */
176 u8 uuid[BTRFS_UUID_SIZE];
178 /* uuid of FS who owns this device */
179 u8 fsid[BTRFS_UUID_SIZE];
180 } __attribute__ ((__packed__));
182 struct btrfs_stripe {
185 u8 dev_uuid[BTRFS_UUID_SIZE];
186 } __attribute__ ((__packed__));
189 /* size of this chunk in bytes */
192 /* objectid of the root referencing this chunk */
198 /* optimal io alignment for this chunk */
201 /* optimal io width for this chunk */
204 /* minimal io size for this chunk */
207 /* 2^16 stripes is quite a lot, a second limit is the size of a single
212 /* sub stripes only matter for raid10 */
214 struct btrfs_stripe stripe;
215 /* additional stripes go here */
216 } __attribute__ ((__packed__));
218 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
220 BUG_ON(num_stripes == 0);
221 return sizeof(struct btrfs_chunk) +
222 sizeof(struct btrfs_stripe) * (num_stripes - 1);
225 #define BTRFS_FSID_SIZE 16
226 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
229 * every tree block (leaf or node) starts with this header.
231 struct btrfs_header {
232 /* these first four must match the super block */
233 u8 csum[BTRFS_CSUM_SIZE];
234 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
235 __le64 bytenr; /* which block this node is supposed to live in */
238 /* allowed to be different from the super from here on down */
239 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
244 } __attribute__ ((__packed__));
246 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
247 sizeof(struct btrfs_header)) / \
248 sizeof(struct btrfs_key_ptr))
249 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
250 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
251 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
252 sizeof(struct btrfs_item) - \
253 sizeof(struct btrfs_file_extent_item))
255 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
258 * this is a very generous portion of the super block, giving us
259 * room to translate 14 chunks with 3 stripes each.
261 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
262 #define BTRFS_LABEL_SIZE 256
265 * the super block basically lists the main trees of the FS
266 * it currently lacks any block count etc etc
268 struct btrfs_super_block {
269 u8 csum[BTRFS_CSUM_SIZE];
270 /* the first 3 fields must match struct btrfs_header */
271 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
272 __le64 bytenr; /* this block number */
275 /* allowed to be different from the btrfs_header from here own down */
283 __le64 root_dir_objectid;
289 __le32 sys_chunk_array_size;
290 __le64 chunk_root_generation;
294 struct btrfs_dev_item dev_item;
295 char label[BTRFS_LABEL_SIZE];
296 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
297 } __attribute__ ((__packed__));
300 * A leaf is full of items. offset and size tell us where to find
301 * the item in the leaf (relative to the start of the data area)
304 struct btrfs_disk_key key;
307 } __attribute__ ((__packed__));
310 * leaves have an item area and a data area:
311 * [item0, item1....itemN] [free space] [dataN...data1, data0]
313 * The data is separate from the items to get the keys closer together
317 struct btrfs_header header;
318 struct btrfs_item items[];
319 } __attribute__ ((__packed__));
322 * all non-leaf blocks are nodes, they hold only keys and pointers to
325 struct btrfs_key_ptr {
326 struct btrfs_disk_key key;
329 } __attribute__ ((__packed__));
332 struct btrfs_header header;
333 struct btrfs_key_ptr ptrs[];
334 } __attribute__ ((__packed__));
337 * btrfs_paths remember the path taken from the root down to the leaf.
338 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
339 * to any other levels that are present.
341 * The slots array records the index of the item or block pointer
342 * used while walking the tree.
345 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
346 int slots[BTRFS_MAX_LEVEL];
352 * items in the extent btree are used to record the objectid of the
353 * owner of the block and the number of references
355 struct btrfs_extent_item {
357 } __attribute__ ((__packed__));
359 struct btrfs_extent_ref {
364 } __attribute__ ((__packed__));
366 /* dev extents record free space on individual devices. The owner
367 * field points back to the chunk allocation mapping tree that allocated
368 * the extent. The chunk tree uuid field is a way to double check the owner
370 struct btrfs_dev_extent {
372 __le64 chunk_objectid;
375 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
376 } __attribute__ ((__packed__));
378 struct btrfs_inode_ref {
382 } __attribute__ ((__packed__));
384 struct btrfs_timespec {
387 } __attribute__ ((__packed__));
390 BTRFS_COMPRESS_NONE = 0,
391 BTRFS_COMPRESS_ZLIB = 1,
392 BTRFS_COMPRESS_LAST = 2,
393 } btrfs_compression_type;
395 /* we don't understand any encryption methods right now */
397 BTRFS_ENCRYPTION_NONE = 0,
398 BTRFS_ENCRYPTION_LAST = 1,
399 } btrfs_encryption_type;
401 struct btrfs_inode_item {
402 /* nfs style generation number */
404 /* transid that last touched this inode */
417 struct btrfs_timespec atime;
418 struct btrfs_timespec ctime;
419 struct btrfs_timespec mtime;
420 struct btrfs_timespec otime;
421 } __attribute__ ((__packed__));
423 struct btrfs_dir_item {
424 struct btrfs_disk_key location;
429 } __attribute__ ((__packed__));
431 struct btrfs_root_item {
432 struct btrfs_inode_item inode;
438 __le64 last_snapshot;
441 struct btrfs_disk_key drop_progress;
444 } __attribute__ ((__packed__));
447 * this is used for both forward and backward root refs
449 struct btrfs_root_ref {
453 } __attribute__ ((__packed__));
455 #define BTRFS_FILE_EXTENT_INLINE 0
456 #define BTRFS_FILE_EXTENT_REG 1
457 #define BTRFS_FILE_EXTENT_PREALLOC 2
459 struct btrfs_file_extent_item {
461 * transaction id that created this extent
465 * max number of bytes to hold this extent in ram
466 * when we split a compressed extent we can't know how big
467 * each of the resulting pieces will be. So, this is
468 * an upper limit on the size of the extent in ram instead of
474 * 32 bits for the various ways we might encode the data,
475 * including compression and encryption. If any of these
476 * are set to something a given disk format doesn't understand
477 * it is treated like an incompat flag for reading and writing,
482 __le16 other_encoding; /* spare for later use */
484 /* are we inline data or a real extent? */
488 * disk space consumed by the extent, checksum blocks are included
492 __le64 disk_num_bytes;
494 * the logical offset in file blocks (no csums)
495 * this extent record is for. This allows a file extent to point
496 * into the middle of an existing extent on disk, sharing it
497 * between two snapshots (useful if some bytes in the middle of the
498 * extent have changed
502 * the logical number of file blocks (no csums included)
506 } __attribute__ ((__packed__));
508 struct btrfs_csum_item {
510 } __attribute__ ((__packed__));
512 /* tag for the radix tree of block groups in ram */
513 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
514 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
515 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
516 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
517 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
518 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
519 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
521 struct btrfs_block_group_item {
523 __le64 chunk_objectid;
525 } __attribute__ ((__packed__));
527 struct btrfs_space_info {
533 struct list_head list;
536 struct btrfs_block_group_cache {
537 struct cache_extent cache;
538 struct btrfs_key key;
539 struct btrfs_block_group_item item;
540 struct btrfs_space_info *space_info;
547 struct btrfs_extent_ops {
548 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
549 u64 hint_byte, struct btrfs_key *ins);
550 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
555 struct btrfs_fs_devices;
556 struct btrfs_fs_info {
557 u8 fsid[BTRFS_FSID_SIZE];
558 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
559 struct btrfs_root *fs_root;
560 struct btrfs_root *extent_root;
561 struct btrfs_root *tree_root;
562 struct btrfs_root *chunk_root;
563 struct btrfs_root *dev_root;
565 /* the log root tree is a directory of all the other log roots */
566 struct btrfs_root *log_root_tree;
568 struct extent_io_tree extent_cache;
569 struct extent_io_tree free_space_cache;
570 struct extent_io_tree block_group_cache;
571 struct extent_io_tree pinned_extents;
572 struct extent_io_tree pending_del;
573 struct extent_io_tree extent_ins;
575 /* logical->physical extent mapping */
576 struct btrfs_mapping_tree mapping_tree;
579 u64 last_trans_committed;
581 u64 avail_data_alloc_bits;
582 u64 avail_metadata_alloc_bits;
583 u64 avail_system_alloc_bits;
584 u64 data_alloc_profile;
585 u64 metadata_alloc_profile;
586 u64 system_alloc_profile;
589 struct btrfs_trans_handle *running_transaction;
590 struct btrfs_super_block super_copy;
591 struct extent_buffer *sb_buffer;
592 struct mutex fs_mutex;
595 struct btrfs_extent_ops *extent_ops;
596 struct list_head dirty_cowonly_roots;
598 struct btrfs_fs_devices *fs_devices;
599 struct list_head space_info;
605 * in ram representation of the tree. extent_root is used for all allocations
606 * and for the extent tree extent_root root.
609 struct extent_buffer *node;
610 struct extent_buffer *commit_root;
611 struct btrfs_root_item root_item;
612 struct btrfs_key root_key;
613 struct btrfs_fs_info *fs_info;
617 /* data allocations are done in sectorsize units */
620 /* node allocations are done in nodesize units */
623 /* leaf allocations are done in leafsize units */
626 /* leaf allocations are done in leafsize units */
635 u64 last_inode_alloc;
637 /* the dirty list is only used by non-reference counted roots */
638 struct list_head dirty_list;
642 * inode items have the data typically returned from stat and store other
643 * info about object characteristics. There is one for every file and dir in
646 #define BTRFS_INODE_ITEM_KEY 1
647 #define BTRFS_INODE_REF_KEY 12
648 #define BTRFS_XATTR_ITEM_KEY 24
649 #define BTRFS_ORPHAN_ITEM_KEY 48
651 #define BTRFS_DIR_LOG_ITEM_KEY 60
652 #define BTRFS_DIR_LOG_INDEX_KEY 72
654 * dir items are the name -> inode pointers in a directory. There is one
655 * for every name in a directory.
657 #define BTRFS_DIR_ITEM_KEY 84
658 #define BTRFS_DIR_INDEX_KEY 96
661 * extent data is for file data
663 #define BTRFS_EXTENT_DATA_KEY 108
666 * csum items have the checksums for data in the extents
668 #define BTRFS_CSUM_ITEM_KEY 120
671 * root items point to tree roots. There are typically in the root
672 * tree used by the super block to find all the other trees
674 #define BTRFS_ROOT_ITEM_KEY 132
677 * root backrefs tie subvols and snapshots to the directory entries that
680 #define BTRFS_ROOT_BACKREF_KEY 144
683 * root refs make a fast index for listing all of the snapshots and
684 * subvolumes referenced by a given root. They point directly to the
685 * directory item in the root that references the subvol
687 #define BTRFS_ROOT_REF_KEY 156
690 * extent items are in the extent map tree. These record which blocks
691 * are used, and how many references there are to each block
693 #define BTRFS_EXTENT_ITEM_KEY 168
694 #define BTRFS_EXTENT_REF_KEY 180
697 * block groups give us hints into the extent allocation trees. Which
698 * blocks are free etc etc
700 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
702 #define BTRFS_DEV_EXTENT_KEY 204
703 #define BTRFS_DEV_ITEM_KEY 216
704 #define BTRFS_CHUNK_ITEM_KEY 228
707 * string items are for debugging. They just store a short string of
710 #define BTRFS_STRING_ITEM_KEY 253
714 #define BTRFS_INODE_NODATASUM (1 << 0)
715 #define BTRFS_INODE_NODATACOW (1 << 1)
716 #define BTRFS_INODE_READONLY (1 << 2)
718 #define read_eb_member(eb, ptr, type, member, result) ( \
719 read_extent_buffer(eb, (char *)(result), \
720 ((unsigned long)(ptr)) + \
721 offsetof(type, member), \
722 sizeof(((type *)0)->member)))
724 #define write_eb_member(eb, ptr, type, member, result) ( \
725 write_extent_buffer(eb, (char *)(result), \
726 ((unsigned long)(ptr)) + \
727 offsetof(type, member), \
728 sizeof(((type *)0)->member)))
730 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
731 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
733 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
734 return le##bits##_to_cpu(h->member); \
736 static inline void btrfs_set_##name(struct extent_buffer *eb, \
739 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
740 h->member = cpu_to_le##bits(val); \
743 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
744 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
747 unsigned long offset = (unsigned long)s; \
748 type *p = (type *) (eb->data + offset); \
749 return le##bits##_to_cpu(p->member); \
751 static inline void btrfs_set_##name(struct extent_buffer *eb, \
752 type *s, u##bits val) \
754 unsigned long offset = (unsigned long)s; \
755 type *p = (type *) (eb->data + offset); \
756 p->member = cpu_to_le##bits(val); \
759 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
760 static inline u##bits btrfs_##name(type *s) \
762 return le##bits##_to_cpu(s->member); \
764 static inline void btrfs_set_##name(type *s, u##bits val) \
766 s->member = cpu_to_le##bits(val); \
769 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
770 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
771 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
772 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
773 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
774 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
775 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
776 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
777 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
778 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
779 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
781 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
782 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
784 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
786 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
788 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
790 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
792 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
793 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
795 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
797 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
799 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
802 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
804 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
807 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
809 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
812 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
813 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
814 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
815 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
816 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
817 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
818 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
819 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
820 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
821 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
822 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
824 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
826 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
829 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
830 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
831 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
833 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
835 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
837 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
839 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
840 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
842 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
844 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
845 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
847 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
850 unsigned long offset = (unsigned long)c;
851 offset += offsetof(struct btrfs_chunk, stripe);
852 offset += nr * sizeof(struct btrfs_stripe);
853 return (struct btrfs_stripe *)offset;
856 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
858 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
861 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
862 struct btrfs_chunk *c, int nr)
864 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
867 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
868 struct btrfs_chunk *c, int nr,
871 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
874 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
875 struct btrfs_chunk *c, int nr)
877 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
880 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
881 struct btrfs_chunk *c, int nr,
884 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
887 /* struct btrfs_block_group_item */
888 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
890 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
892 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
893 struct btrfs_block_group_item, chunk_objectid, 64);
895 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
896 struct btrfs_block_group_item, chunk_objectid, 64);
897 BTRFS_SETGET_FUNCS(disk_block_group_flags,
898 struct btrfs_block_group_item, flags, 64);
899 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
900 struct btrfs_block_group_item, flags, 64);
902 /* struct btrfs_inode_ref */
903 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
904 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
906 /* struct btrfs_inode_item */
907 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
908 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
909 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
910 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
911 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
912 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
913 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
914 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
915 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
916 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
917 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
918 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
921 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
922 struct btrfs_inode_item, generation, 64);
923 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
924 struct btrfs_inode_item, size, 64);
925 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
926 struct btrfs_inode_item, nbytes, 64);
927 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
928 struct btrfs_inode_item, block_group, 64);
929 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
930 struct btrfs_inode_item, nlink, 32);
931 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
932 struct btrfs_inode_item, uid, 32);
933 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
934 struct btrfs_inode_item, gid, 32);
935 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
936 struct btrfs_inode_item, mode, 32);
937 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
938 struct btrfs_inode_item, rdev, 64);
939 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
940 struct btrfs_inode_item, flags, 16);
941 BTRFS_SETGET_STACK_FUNCS(stack_inode_compat_flags,
942 struct btrfs_inode_item, compat_flags, 16);
944 static inline struct btrfs_timespec *
945 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
947 unsigned long ptr = (unsigned long)inode_item;
948 ptr += offsetof(struct btrfs_inode_item, atime);
949 return (struct btrfs_timespec *)ptr;
952 static inline struct btrfs_timespec *
953 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
955 unsigned long ptr = (unsigned long)inode_item;
956 ptr += offsetof(struct btrfs_inode_item, mtime);
957 return (struct btrfs_timespec *)ptr;
960 static inline struct btrfs_timespec *
961 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
963 unsigned long ptr = (unsigned long)inode_item;
964 ptr += offsetof(struct btrfs_inode_item, ctime);
965 return (struct btrfs_timespec *)ptr;
968 static inline struct btrfs_timespec *
969 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
971 unsigned long ptr = (unsigned long)inode_item;
972 ptr += offsetof(struct btrfs_inode_item, otime);
973 return (struct btrfs_timespec *)ptr;
976 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
977 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
978 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
980 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
983 /* struct btrfs_dev_extent */
984 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
986 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
988 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
990 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
992 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
994 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
995 return (u8 *)((unsigned long)dev + ptr);
998 /* struct btrfs_extent_ref */
999 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1000 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1001 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1002 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1004 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1005 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1007 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1009 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1012 /* struct btrfs_extent_item */
1013 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1014 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1017 /* struct btrfs_node */
1018 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1019 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1021 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1024 ptr = offsetof(struct btrfs_node, ptrs) +
1025 sizeof(struct btrfs_key_ptr) * nr;
1026 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1029 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1033 ptr = offsetof(struct btrfs_node, ptrs) +
1034 sizeof(struct btrfs_key_ptr) * nr;
1035 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1038 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1041 ptr = offsetof(struct btrfs_node, ptrs) +
1042 sizeof(struct btrfs_key_ptr) * nr;
1043 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1046 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1050 ptr = offsetof(struct btrfs_node, ptrs) +
1051 sizeof(struct btrfs_key_ptr) * nr;
1052 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1055 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1057 return offsetof(struct btrfs_node, ptrs) +
1058 sizeof(struct btrfs_key_ptr) * nr;
1061 static inline void btrfs_node_key(struct extent_buffer *eb,
1062 struct btrfs_disk_key *disk_key, int nr)
1065 ptr = btrfs_node_key_ptr_offset(nr);
1066 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1067 struct btrfs_key_ptr, key, disk_key);
1070 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1071 struct btrfs_disk_key *disk_key, int nr)
1074 ptr = btrfs_node_key_ptr_offset(nr);
1075 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1076 struct btrfs_key_ptr, key, disk_key);
1079 /* struct btrfs_item */
1080 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1081 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1083 static inline unsigned long btrfs_item_nr_offset(int nr)
1085 return offsetof(struct btrfs_leaf, items) +
1086 sizeof(struct btrfs_item) * nr;
1089 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1092 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1095 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1096 struct btrfs_item *item)
1098 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1101 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1103 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1106 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1108 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1111 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1113 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1116 static inline void btrfs_item_key(struct extent_buffer *eb,
1117 struct btrfs_disk_key *disk_key, int nr)
1119 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1120 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1123 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1124 struct btrfs_disk_key *disk_key, int nr)
1126 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1127 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1131 * struct btrfs_root_ref
1133 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1134 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1135 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1137 /* struct btrfs_dir_item */
1138 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1139 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1140 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1141 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1143 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1144 struct btrfs_dir_item *item,
1145 struct btrfs_disk_key *key)
1147 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1150 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1151 struct btrfs_dir_item *item,
1152 struct btrfs_disk_key *key)
1154 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1157 /* struct btrfs_disk_key */
1158 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1160 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1161 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1163 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1164 struct btrfs_disk_key *disk)
1166 cpu->offset = le64_to_cpu(disk->offset);
1167 cpu->type = disk->type;
1168 cpu->objectid = le64_to_cpu(disk->objectid);
1171 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1172 struct btrfs_key *cpu)
1174 disk->offset = cpu_to_le64(cpu->offset);
1175 disk->type = cpu->type;
1176 disk->objectid = cpu_to_le64(cpu->objectid);
1179 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1180 struct btrfs_key *key, int nr)
1182 struct btrfs_disk_key disk_key;
1183 btrfs_node_key(eb, &disk_key, nr);
1184 btrfs_disk_key_to_cpu(key, &disk_key);
1187 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1188 struct btrfs_key *key, int nr)
1190 struct btrfs_disk_key disk_key;
1191 btrfs_item_key(eb, &disk_key, nr);
1192 btrfs_disk_key_to_cpu(key, &disk_key);
1195 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1196 struct btrfs_dir_item *item,
1197 struct btrfs_key *key)
1199 struct btrfs_disk_key disk_key;
1200 btrfs_dir_item_key(eb, item, &disk_key);
1201 btrfs_disk_key_to_cpu(key, &disk_key);
1205 static inline u8 btrfs_key_type(struct btrfs_key *key)
1210 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1215 /* struct btrfs_header */
1216 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1217 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1219 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1220 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1221 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1222 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1224 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1226 return (btrfs_header_flags(eb) & flag) == flag;
1229 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1231 u64 flags = btrfs_header_flags(eb);
1232 btrfs_set_header_flags(eb, flags | flag);
1233 return (flags & flag) == flag;
1236 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1238 u64 flags = btrfs_header_flags(eb);
1239 btrfs_set_header_flags(eb, flags & ~flag);
1240 return (flags & flag) == flag;
1243 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1245 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1249 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1251 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1255 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1257 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1261 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1263 unsigned long ptr = offsetof(struct btrfs_header, csum);
1267 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1272 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1277 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1282 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1284 return (btrfs_header_level(eb) == 0);
1287 /* struct btrfs_root_item */
1288 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1290 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1291 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1292 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1294 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1296 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1297 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1298 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1299 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1300 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1301 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1302 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1303 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1307 /* struct btrfs_super_block */
1308 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1309 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1310 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1312 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1313 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1314 struct btrfs_super_block, sys_chunk_array_size, 32);
1315 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1316 struct btrfs_super_block, chunk_root_generation, 64);
1317 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1319 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1321 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1322 chunk_root_level, 8);
1323 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1325 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1327 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1329 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1331 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1333 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1335 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1337 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1339 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1340 root_dir_objectid, 64);
1341 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1344 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1346 return offsetof(struct btrfs_leaf, items);
1349 /* struct btrfs_file_extent_item */
1350 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1352 static inline unsigned long btrfs_file_extent_inline_start(struct
1353 btrfs_file_extent_item *e)
1355 unsigned long offset = (unsigned long)e;
1356 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1360 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1362 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1365 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1366 struct btrfs_item *e)
1368 unsigned long offset;
1369 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1370 return btrfs_item_size(eb, e) - offset;
1373 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1375 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1377 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1378 disk_num_bytes, 64);
1379 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1381 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1383 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1385 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1387 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1389 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1390 other_encoding, 16);
1392 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1394 return root->leafsize;
1395 return root->nodesize;
1398 /* helper function to cast into the data area of the leaf. */
1399 #define btrfs_item_ptr(leaf, slot, type) \
1400 ((type *)(btrfs_leaf_data(leaf) + \
1401 btrfs_item_offset_nr(leaf, slot)))
1403 #define btrfs_item_ptr_offset(leaf, slot) \
1404 ((unsigned long)(btrfs_leaf_data(leaf) + \
1405 btrfs_item_offset_nr(leaf, slot)))
1408 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1409 struct btrfs_root *root);
1410 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1411 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1412 btrfs_fs_info *info,
1414 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1415 struct btrfs_block_group_cache
1416 *hint, u64 search_start,
1417 int data, int owner);
1418 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1419 struct btrfs_root *root,
1420 u32 blocksize, u64 parent,
1426 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1427 struct btrfs_root *root,
1428 u64 num_bytes, u64 parent,
1429 u64 root_objectid, u64 ref_generation,
1430 u64 owner, u64 empty_size, u64 hint_byte,
1431 u64 search_end, struct btrfs_key *ins, int data);
1432 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1433 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1435 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1436 struct btrfs_root *root, struct extent_buffer *orig_buf,
1437 struct extent_buffer *buf, int start_slot, int nr);
1438 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1439 *root, u64 bytenr, u64 num_bytes, u64 parent,
1440 u64 root_objectid, u64 ref_generation,
1441 u64 owner_objectid, int pin);
1442 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1443 struct btrfs_root *root,
1444 struct extent_io_tree *unpin);
1445 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1446 struct btrfs_root *root,
1447 u64 bytenr, u64 num_bytes, u64 parent,
1448 u64 root_objectid, u64 ref_generation,
1449 u64 owner_objectid);
1450 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1451 struct btrfs_root *root, u64 bytenr,
1452 u64 orig_parent, u64 parent,
1453 u64 root_objectid, u64 ref_generation,
1454 u64 owner_objectid);
1455 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1456 struct btrfs_root *root);
1457 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1458 int btrfs_read_block_groups(struct btrfs_root *root);
1459 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1460 struct btrfs_root *root, u64 bytes_used,
1461 u64 type, u64 chunk_objectid, u64 chunk_offset,
1463 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
1464 struct btrfs_root *root);
1465 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1466 struct btrfs_root *root, u64 bytenr, u64 num,
1467 int alloc, int mark_free);
1469 int btrfs_previous_item(struct btrfs_root *root,
1470 struct btrfs_path *path, u64 min_objectid,
1472 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1473 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1474 struct btrfs_root *root, struct extent_buffer *buf,
1475 struct extent_buffer *parent, int parent_slot,
1476 struct extent_buffer **cow_ret);
1477 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
1478 struct btrfs_root *root,
1479 struct extent_buffer *buf,
1480 struct extent_buffer *parent, int parent_slot,
1481 struct extent_buffer **cow_ret,
1482 u64 search_start, u64 empty_size);
1483 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1484 struct btrfs_root *root,
1485 struct extent_buffer *buf,
1486 struct extent_buffer **cow_ret, u64 new_root_objectid);
1487 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1488 *root, struct btrfs_path *path, u32 data_size);
1489 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1490 struct btrfs_root *root,
1491 struct btrfs_path *path,
1492 u32 new_size, int from_end);
1493 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1494 *root, struct btrfs_key *key, struct btrfs_path *p, int
1496 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1497 struct btrfs_root *root, struct extent_buffer *parent,
1498 int start_slot, int cache_only, u64 *last_ret,
1499 struct btrfs_key *progress);
1500 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1501 struct btrfs_path *btrfs_alloc_path(void);
1502 void btrfs_free_path(struct btrfs_path *p);
1503 void btrfs_init_path(struct btrfs_path *p);
1504 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1505 struct btrfs_path *path, int slot, int nr);
1507 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1508 struct btrfs_root *root,
1509 struct btrfs_path *path)
1511 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1514 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1515 *root, struct btrfs_key *key, void *data, u32 data_size);
1516 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1517 struct btrfs_root *root,
1518 struct btrfs_path *path,
1519 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1521 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1522 struct btrfs_root *root,
1523 struct btrfs_path *path,
1524 struct btrfs_key *key,
1527 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1530 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1531 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1532 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1533 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1535 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1536 struct btrfs_root *root, struct btrfs_path *path,
1537 struct btrfs_key *new_key);
1540 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1541 struct btrfs_key *key);
1542 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1543 *root, struct btrfs_key *key, struct btrfs_root_item
1545 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1546 *root, struct btrfs_key *key, struct btrfs_root_item
1548 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1549 btrfs_root_item *item, struct btrfs_key *key);
1550 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1551 struct btrfs_root *latest_root);
1553 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1554 *root, const char *name, int name_len, u64 dir,
1555 struct btrfs_key *location, u8 type);
1556 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1557 struct btrfs_root *root,
1558 struct btrfs_path *path, u64 dir,
1559 const char *name, int name_len,
1561 struct btrfs_dir_item *
1562 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1563 struct btrfs_root *root,
1564 struct btrfs_path *path, u64 dir,
1565 u64 objectid, const char *name, int name_len,
1567 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1568 struct btrfs_path *path,
1569 const char *name, int name_len);
1570 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1571 struct btrfs_root *root,
1572 struct btrfs_path *path,
1573 struct btrfs_dir_item *di);
1574 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1575 struct btrfs_root *root, const char *name,
1576 u16 name_len, const void *data, u16 data_len,
1578 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1579 struct btrfs_root *root,
1580 struct btrfs_path *path, u64 dir,
1581 const char *name, u16 name_len,
1584 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1585 struct btrfs_root *fs_root,
1586 u64 dirid, u64 *objectid);
1587 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1590 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1591 struct btrfs_root *root,
1592 const char *name, int name_len,
1593 u64 inode_objectid, u64 ref_objectid, u64 index);
1594 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1595 struct btrfs_root *root,
1596 const char *name, int name_len,
1597 u64 inode_objectid, u64 ref_objectid);
1598 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1599 struct btrfs_root *root,
1600 struct btrfs_path *path, u64 objectid);
1601 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1602 *root, u64 objectid, struct btrfs_inode_item
1604 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1605 *root, struct btrfs_path *path,
1606 struct btrfs_key *location, int mod);
1609 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1610 struct btrfs_root *root,
1611 u64 objectid, u64 pos, u64 offset,
1614 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
1615 struct btrfs_root *root, u64 objectid,
1616 u64 offset, char *buffer, size_t size);
1617 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1618 struct btrfs_root *root,
1619 struct btrfs_path *path, u64 objectid,
1620 u64 bytenr, int mod);
1621 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
1622 struct btrfs_root *root,
1623 struct btrfs_inode_item *inode,
1624 u64 objectid, u64 offset,
1625 char *data, size_t len);
1626 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1627 struct btrfs_root *root,
1628 struct btrfs_path *path,
1629 u64 objectid, u64 offset,
1631 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1632 struct btrfs_root *root, struct btrfs_path *path,