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 /* grouping information for allocation decisions */
166 /* seek speed 0-100 where 100 is fastest */
169 /* bandwidth 0-100 where 100 is fastest */
172 /* btrfs generated uuid for this device */
173 u8 uuid[BTRFS_UUID_SIZE];
174 } __attribute__ ((__packed__));
176 struct btrfs_stripe {
179 u8 dev_uuid[BTRFS_UUID_SIZE];
180 } __attribute__ ((__packed__));
183 /* size of this chunk in bytes */
186 /* objectid of the root referencing this chunk */
192 /* optimal io alignment for this chunk */
195 /* optimal io width for this chunk */
198 /* minimal io size for this chunk */
201 /* 2^16 stripes is quite a lot, a second limit is the size of a single
206 /* sub stripes only matter for raid10 */
208 struct btrfs_stripe stripe;
209 /* additional stripes go here */
210 } __attribute__ ((__packed__));
212 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
214 BUG_ON(num_stripes == 0);
215 return sizeof(struct btrfs_chunk) +
216 sizeof(struct btrfs_stripe) * (num_stripes - 1);
219 #define BTRFS_FSID_SIZE 16
220 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
223 * every tree block (leaf or node) starts with this header.
225 struct btrfs_header {
226 /* these first four must match the super block */
227 u8 csum[BTRFS_CSUM_SIZE];
228 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
229 __le64 bytenr; /* which block this node is supposed to live in */
232 /* allowed to be different from the super from here on down */
233 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
238 } __attribute__ ((__packed__));
240 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
241 sizeof(struct btrfs_header)) / \
242 sizeof(struct btrfs_key_ptr))
243 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
244 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
245 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
246 sizeof(struct btrfs_item) - \
247 sizeof(struct btrfs_file_extent_item))
250 * this is a very generous portion of the super block, giving us
251 * room to translate 14 chunks with 3 stripes each.
253 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
254 #define BTRFS_LABEL_SIZE 256
257 * the super block basically lists the main trees of the FS
258 * it currently lacks any block count etc etc
260 struct btrfs_super_block {
261 u8 csum[BTRFS_CSUM_SIZE];
262 /* the first 3 fields must match struct btrfs_header */
263 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
264 __le64 bytenr; /* this block number */
267 /* allowed to be different from the btrfs_header from here own down */
275 __le64 root_dir_objectid;
281 __le32 sys_chunk_array_size;
282 __le64 chunk_root_generation;
286 struct btrfs_dev_item dev_item;
287 char label[BTRFS_LABEL_SIZE];
288 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
289 } __attribute__ ((__packed__));
292 * A leaf is full of items. offset and size tell us where to find
293 * the item in the leaf (relative to the start of the data area)
296 struct btrfs_disk_key key;
299 } __attribute__ ((__packed__));
302 * leaves have an item area and a data area:
303 * [item0, item1....itemN] [free space] [dataN...data1, data0]
305 * The data is separate from the items to get the keys closer together
309 struct btrfs_header header;
310 struct btrfs_item items[];
311 } __attribute__ ((__packed__));
314 * all non-leaf blocks are nodes, they hold only keys and pointers to
317 struct btrfs_key_ptr {
318 struct btrfs_disk_key key;
321 } __attribute__ ((__packed__));
324 struct btrfs_header header;
325 struct btrfs_key_ptr ptrs[];
326 } __attribute__ ((__packed__));
329 * btrfs_paths remember the path taken from the root down to the leaf.
330 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
331 * to any other levels that are present.
333 * The slots array records the index of the item or block pointer
334 * used while walking the tree.
337 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
338 int slots[BTRFS_MAX_LEVEL];
344 * items in the extent btree are used to record the objectid of the
345 * owner of the block and the number of references
347 struct btrfs_extent_item {
349 } __attribute__ ((__packed__));
351 struct btrfs_extent_ref {
356 } __attribute__ ((__packed__));
358 /* dev extents record free space on individual devices. The owner
359 * field points back to the chunk allocation mapping tree that allocated
360 * the extent. The chunk tree uuid field is a way to double check the owner
362 struct btrfs_dev_extent {
364 __le64 chunk_objectid;
367 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
368 } __attribute__ ((__packed__));
370 struct btrfs_inode_ref {
374 } __attribute__ ((__packed__));
376 struct btrfs_timespec {
379 } __attribute__ ((__packed__));
382 BTRFS_COMPRESS_NONE = 0,
383 BTRFS_COMPRESS_ZLIB = 1,
384 BTRFS_COMPRESS_LAST = 2,
385 } btrfs_compression_type;
387 /* we don't understand any encryption methods right now */
389 BTRFS_ENCRYPTION_NONE = 0,
390 BTRFS_ENCRYPTION_LAST = 1,
391 } btrfs_encryption_type;
393 struct btrfs_inode_item {
394 /* nfs style generation number */
396 /* transid that last touched this inode */
409 struct btrfs_timespec atime;
410 struct btrfs_timespec ctime;
411 struct btrfs_timespec mtime;
412 struct btrfs_timespec otime;
413 } __attribute__ ((__packed__));
415 struct btrfs_dir_item {
416 struct btrfs_disk_key location;
421 } __attribute__ ((__packed__));
423 struct btrfs_root_item {
424 struct btrfs_inode_item inode;
430 __le64 last_snapshot;
433 struct btrfs_disk_key drop_progress;
436 } __attribute__ ((__packed__));
438 #define BTRFS_FILE_EXTENT_INLINE 0
439 #define BTRFS_FILE_EXTENT_REG 1
440 #define BTRFS_FILE_EXTENT_PREALLOC 2
442 struct btrfs_file_extent_item {
444 * transaction id that created this extent
448 * max number of bytes to hold this extent in ram
449 * when we split a compressed extent we can't know how big
450 * each of the resulting pieces will be. So, this is
451 * an upper limit on the size of the extent in ram instead of
457 * 32 bits for the various ways we might encode the data,
458 * including compression and encryption. If any of these
459 * are set to something a given disk format doesn't understand
460 * it is treated like an incompat flag for reading and writing,
465 __le16 other_encoding; /* spare for later use */
467 /* are we inline data or a real extent? */
471 * disk space consumed by the extent, checksum blocks are included
475 __le64 disk_num_bytes;
477 * the logical offset in file blocks (no csums)
478 * this extent record is for. This allows a file extent to point
479 * into the middle of an existing extent on disk, sharing it
480 * between two snapshots (useful if some bytes in the middle of the
481 * extent have changed
485 * the logical number of file blocks (no csums included)
489 } __attribute__ ((__packed__));
491 struct btrfs_csum_item {
493 } __attribute__ ((__packed__));
495 /* tag for the radix tree of block groups in ram */
496 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
497 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
498 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
499 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
500 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
501 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
502 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
504 struct btrfs_block_group_item {
506 __le64 chunk_objectid;
508 } __attribute__ ((__packed__));
510 struct btrfs_space_info {
516 struct list_head list;
519 struct btrfs_block_group_cache {
520 struct cache_extent cache;
521 struct btrfs_key key;
522 struct btrfs_block_group_item item;
523 struct btrfs_space_info *space_info;
529 struct btrfs_extent_ops {
530 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
531 u64 hint_byte, struct btrfs_key *ins);
532 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
537 struct btrfs_fs_devices;
538 struct btrfs_fs_info {
539 u8 fsid[BTRFS_FSID_SIZE];
540 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
541 struct btrfs_root *fs_root;
542 struct btrfs_root *extent_root;
543 struct btrfs_root *tree_root;
544 struct btrfs_root *chunk_root;
545 struct btrfs_root *dev_root;
547 /* the log root tree is a directory of all the other log roots */
548 struct btrfs_root *log_root_tree;
550 struct extent_io_tree extent_cache;
551 struct extent_io_tree free_space_cache;
552 struct extent_io_tree block_group_cache;
553 struct extent_io_tree pinned_extents;
554 struct extent_io_tree pending_del;
555 struct extent_io_tree extent_ins;
557 /* logical->physical extent mapping */
558 struct btrfs_mapping_tree mapping_tree;
561 u64 last_trans_committed;
563 u64 avail_data_alloc_bits;
564 u64 avail_metadata_alloc_bits;
565 u64 avail_system_alloc_bits;
566 u64 data_alloc_profile;
567 u64 metadata_alloc_profile;
568 u64 system_alloc_profile;
571 struct btrfs_trans_handle *running_transaction;
572 struct btrfs_super_block super_copy;
573 struct extent_buffer *sb_buffer;
574 struct mutex fs_mutex;
577 struct btrfs_extent_ops *extent_ops;
578 struct list_head dirty_cowonly_roots;
580 struct btrfs_fs_devices *fs_devices;
581 struct list_head space_info;
587 * in ram representation of the tree. extent_root is used for all allocations
588 * and for the extent tree extent_root root.
591 struct extent_buffer *node;
592 struct extent_buffer *commit_root;
593 struct btrfs_root_item root_item;
594 struct btrfs_key root_key;
595 struct btrfs_fs_info *fs_info;
599 /* data allocations are done in sectorsize units */
602 /* node allocations are done in nodesize units */
605 /* leaf allocations are done in leafsize units */
608 /* leaf allocations are done in leafsize units */
617 u64 last_inode_alloc;
619 /* the dirty list is only used by non-reference counted roots */
620 struct list_head dirty_list;
624 * inode items have the data typically returned from stat and store other
625 * info about object characteristics. There is one for every file and dir in
628 #define BTRFS_INODE_ITEM_KEY 1
629 #define BTRFS_INODE_REF_KEY 2
630 #define BTRFS_XATTR_ITEM_KEY 8
631 #define BTRFS_ORPHAN_ITEM_KEY 9
633 /* reserve 3-15 close to the inode for later flexibility */
636 * dir items are the name -> inode pointers in a directory. There is one
637 * for every name in a directory.
639 #define BTRFS_DIR_ITEM_KEY 16
640 #define BTRFS_DIR_INDEX_KEY 17
642 * extent data is for file data
644 #define BTRFS_EXTENT_DATA_KEY 18
646 * csum items have the checksums for data in the extents
648 #define BTRFS_CSUM_ITEM_KEY 19
650 /* reserve 20-31 for other file stuff */
653 * root items point to tree roots. There are typically in the root
654 * tree used by the super block to find all the other trees
656 #define BTRFS_ROOT_ITEM_KEY 32
658 * extent items are in the extent map tree. These record which blocks
659 * are used, and how many references there are to each block
661 #define BTRFS_EXTENT_ITEM_KEY 33
662 #define BTRFS_EXTENT_REF_KEY 34
665 * block groups give us hints into the extent allocation trees. Which
666 * blocks are free etc etc
668 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
670 #define BTRFS_DEV_EXTENT_KEY 75
671 #define BTRFS_DEV_ITEM_KEY 76
672 #define BTRFS_CHUNK_ITEM_KEY 77
675 * string items are for debugging. They just store a short string of
678 #define BTRFS_STRING_ITEM_KEY 253
682 #define BTRFS_INODE_NODATASUM (1 << 0)
683 #define BTRFS_INODE_NODATACOW (1 << 1)
684 #define BTRFS_INODE_READONLY (1 << 2)
686 #define read_eb_member(eb, ptr, type, member, result) ( \
687 read_extent_buffer(eb, (char *)(result), \
688 ((unsigned long)(ptr)) + \
689 offsetof(type, member), \
690 sizeof(((type *)0)->member)))
692 #define write_eb_member(eb, ptr, type, member, result) ( \
693 write_extent_buffer(eb, (char *)(result), \
694 ((unsigned long)(ptr)) + \
695 offsetof(type, member), \
696 sizeof(((type *)0)->member)))
698 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
699 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
701 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
702 return le##bits##_to_cpu(h->member); \
704 static inline void btrfs_set_##name(struct extent_buffer *eb, \
707 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
708 h->member = cpu_to_le##bits(val); \
711 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
712 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
715 unsigned long offset = (unsigned long)s; \
716 type *p = (type *) (eb->data + offset); \
717 return le##bits##_to_cpu(p->member); \
719 static inline void btrfs_set_##name(struct extent_buffer *eb, \
720 type *s, u##bits val) \
722 unsigned long offset = (unsigned long)s; \
723 type *p = (type *) (eb->data + offset); \
724 p->member = cpu_to_le##bits(val); \
727 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
728 static inline u##bits btrfs_##name(type *s) \
730 return le##bits##_to_cpu(s->member); \
732 static inline void btrfs_set_##name(type *s, u##bits val) \
734 s->member = cpu_to_le##bits(val); \
737 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
738 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
739 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
740 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
741 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
742 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
743 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
744 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
745 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
746 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
748 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
749 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
751 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
753 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
755 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
757 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
759 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
760 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
762 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
764 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
767 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
769 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
772 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
773 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
774 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
775 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
776 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
777 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
778 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
779 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
780 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
781 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
782 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
784 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
786 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
789 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
790 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
791 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
793 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
795 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
797 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
799 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
800 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
802 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
804 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
805 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
807 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
810 unsigned long offset = (unsigned long)c;
811 offset += offsetof(struct btrfs_chunk, stripe);
812 offset += nr * sizeof(struct btrfs_stripe);
813 return (struct btrfs_stripe *)offset;
816 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
818 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
821 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
822 struct btrfs_chunk *c, int nr)
824 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
827 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
828 struct btrfs_chunk *c, int nr,
831 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
834 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
835 struct btrfs_chunk *c, int nr)
837 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
840 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
841 struct btrfs_chunk *c, int nr,
844 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
847 /* struct btrfs_block_group_item */
848 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
850 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
852 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
853 struct btrfs_block_group_item, chunk_objectid, 64);
855 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
856 struct btrfs_block_group_item, chunk_objectid, 64);
857 BTRFS_SETGET_FUNCS(disk_block_group_flags,
858 struct btrfs_block_group_item, flags, 64);
859 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
860 struct btrfs_block_group_item, flags, 64);
862 /* struct btrfs_inode_ref */
863 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
864 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
866 /* struct btrfs_inode_item */
867 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
868 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
869 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
870 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
871 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
872 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
873 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
874 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
875 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
876 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
877 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
878 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
881 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
882 struct btrfs_inode_item, generation, 64);
883 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
884 struct btrfs_inode_item, size, 64);
885 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
886 struct btrfs_inode_item, nbytes, 64);
887 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
888 struct btrfs_inode_item, block_group, 64);
889 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
890 struct btrfs_inode_item, nlink, 32);
891 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
892 struct btrfs_inode_item, uid, 32);
893 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
894 struct btrfs_inode_item, gid, 32);
895 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
896 struct btrfs_inode_item, mode, 32);
897 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
898 struct btrfs_inode_item, rdev, 64);
899 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
900 struct btrfs_inode_item, flags, 16);
901 BTRFS_SETGET_STACK_FUNCS(stack_inode_compat_flags,
902 struct btrfs_inode_item, compat_flags, 16);
904 static inline struct btrfs_timespec *
905 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
907 unsigned long ptr = (unsigned long)inode_item;
908 ptr += offsetof(struct btrfs_inode_item, atime);
909 return (struct btrfs_timespec *)ptr;
912 static inline struct btrfs_timespec *
913 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
915 unsigned long ptr = (unsigned long)inode_item;
916 ptr += offsetof(struct btrfs_inode_item, mtime);
917 return (struct btrfs_timespec *)ptr;
920 static inline struct btrfs_timespec *
921 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
923 unsigned long ptr = (unsigned long)inode_item;
924 ptr += offsetof(struct btrfs_inode_item, ctime);
925 return (struct btrfs_timespec *)ptr;
928 static inline struct btrfs_timespec *
929 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
931 unsigned long ptr = (unsigned long)inode_item;
932 ptr += offsetof(struct btrfs_inode_item, otime);
933 return (struct btrfs_timespec *)ptr;
936 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
937 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
938 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
940 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
943 /* struct btrfs_dev_extent */
944 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
946 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
948 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
950 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
952 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
954 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
955 return (u8 *)((unsigned long)dev + ptr);
958 /* struct btrfs_extent_ref */
959 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
960 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
961 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
962 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
964 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
965 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
967 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
969 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
972 /* struct btrfs_extent_item */
973 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
974 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
977 /* struct btrfs_node */
978 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
979 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
981 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
984 ptr = offsetof(struct btrfs_node, ptrs) +
985 sizeof(struct btrfs_key_ptr) * nr;
986 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
989 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
993 ptr = offsetof(struct btrfs_node, ptrs) +
994 sizeof(struct btrfs_key_ptr) * nr;
995 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
998 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1001 ptr = offsetof(struct btrfs_node, ptrs) +
1002 sizeof(struct btrfs_key_ptr) * nr;
1003 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1006 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1010 ptr = offsetof(struct btrfs_node, ptrs) +
1011 sizeof(struct btrfs_key_ptr) * nr;
1012 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1015 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1017 return offsetof(struct btrfs_node, ptrs) +
1018 sizeof(struct btrfs_key_ptr) * nr;
1021 static inline void btrfs_node_key(struct extent_buffer *eb,
1022 struct btrfs_disk_key *disk_key, int nr)
1025 ptr = btrfs_node_key_ptr_offset(nr);
1026 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1027 struct btrfs_key_ptr, key, disk_key);
1030 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1031 struct btrfs_disk_key *disk_key, int nr)
1034 ptr = btrfs_node_key_ptr_offset(nr);
1035 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1036 struct btrfs_key_ptr, key, disk_key);
1039 /* struct btrfs_item */
1040 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1041 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1043 static inline unsigned long btrfs_item_nr_offset(int nr)
1045 return offsetof(struct btrfs_leaf, items) +
1046 sizeof(struct btrfs_item) * nr;
1049 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1052 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1055 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1056 struct btrfs_item *item)
1058 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1061 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1063 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1066 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1068 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1071 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1073 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1076 static inline void btrfs_item_key(struct extent_buffer *eb,
1077 struct btrfs_disk_key *disk_key, int nr)
1079 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1080 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1083 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1084 struct btrfs_disk_key *disk_key, int nr)
1086 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1087 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1090 /* struct btrfs_dir_item */
1091 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1092 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1093 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1094 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1096 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1097 struct btrfs_dir_item *item,
1098 struct btrfs_disk_key *key)
1100 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1103 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1104 struct btrfs_dir_item *item,
1105 struct btrfs_disk_key *key)
1107 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1110 /* struct btrfs_disk_key */
1111 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1113 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1114 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1116 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1117 struct btrfs_disk_key *disk)
1119 cpu->offset = le64_to_cpu(disk->offset);
1120 cpu->type = disk->type;
1121 cpu->objectid = le64_to_cpu(disk->objectid);
1124 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1125 struct btrfs_key *cpu)
1127 disk->offset = cpu_to_le64(cpu->offset);
1128 disk->type = cpu->type;
1129 disk->objectid = cpu_to_le64(cpu->objectid);
1132 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1133 struct btrfs_key *key, int nr)
1135 struct btrfs_disk_key disk_key;
1136 btrfs_node_key(eb, &disk_key, nr);
1137 btrfs_disk_key_to_cpu(key, &disk_key);
1140 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1141 struct btrfs_key *key, int nr)
1143 struct btrfs_disk_key disk_key;
1144 btrfs_item_key(eb, &disk_key, nr);
1145 btrfs_disk_key_to_cpu(key, &disk_key);
1148 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1149 struct btrfs_dir_item *item,
1150 struct btrfs_key *key)
1152 struct btrfs_disk_key disk_key;
1153 btrfs_dir_item_key(eb, item, &disk_key);
1154 btrfs_disk_key_to_cpu(key, &disk_key);
1158 static inline u8 btrfs_key_type(struct btrfs_key *key)
1163 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1168 /* struct btrfs_header */
1169 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1170 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1172 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1173 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1174 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1175 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1177 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1179 return (btrfs_header_flags(eb) & flag) == flag;
1182 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1184 u64 flags = btrfs_header_flags(eb);
1185 btrfs_set_header_flags(eb, flags | flag);
1186 return (flags & flag) == flag;
1189 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1191 u64 flags = btrfs_header_flags(eb);
1192 btrfs_set_header_flags(eb, flags & ~flag);
1193 return (flags & flag) == flag;
1196 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1198 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1202 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1204 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1208 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1210 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1214 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1216 unsigned long ptr = offsetof(struct btrfs_header, csum);
1220 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1225 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1230 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1235 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1237 return (btrfs_header_level(eb) == 0);
1240 /* struct btrfs_root_item */
1241 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1243 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1244 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1245 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1247 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1249 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1250 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1251 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1252 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1253 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1254 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1255 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1256 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1260 /* struct btrfs_super_block */
1261 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1262 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1264 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1265 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1266 struct btrfs_super_block, sys_chunk_array_size, 32);
1267 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1268 struct btrfs_super_block, chunk_root_generation, 64);
1269 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1271 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1273 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1274 chunk_root_level, 8);
1275 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1277 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1279 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1281 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1283 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1285 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1287 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1289 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1291 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1292 root_dir_objectid, 64);
1293 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1296 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1298 return offsetof(struct btrfs_leaf, items);
1301 /* struct btrfs_file_extent_item */
1302 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1304 static inline unsigned long btrfs_file_extent_inline_start(struct
1305 btrfs_file_extent_item *e)
1307 unsigned long offset = (unsigned long)e;
1308 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1312 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1314 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1317 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1318 struct btrfs_item *e)
1320 unsigned long offset;
1321 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1322 return btrfs_item_size(eb, e) - offset;
1325 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1327 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1329 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1330 disk_num_bytes, 64);
1331 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1333 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1335 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1337 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1339 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1341 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1342 other_encoding, 16);
1344 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1346 return root->leafsize;
1347 return root->nodesize;
1350 /* helper function to cast into the data area of the leaf. */
1351 #define btrfs_item_ptr(leaf, slot, type) \
1352 ((type *)(btrfs_leaf_data(leaf) + \
1353 btrfs_item_offset_nr(leaf, slot)))
1355 #define btrfs_item_ptr_offset(leaf, slot) \
1356 ((unsigned long)(btrfs_leaf_data(leaf) + \
1357 btrfs_item_offset_nr(leaf, slot)))
1360 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1361 struct btrfs_root *root);
1362 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1363 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1364 btrfs_fs_info *info,
1366 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1367 struct btrfs_block_group_cache
1368 *hint, u64 search_start,
1369 int data, int owner);
1370 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1371 struct btrfs_root *root,
1372 u32 blocksize, u64 parent,
1378 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1379 struct btrfs_root *root,
1380 u64 num_bytes, u64 parent,
1381 u64 root_objectid, u64 ref_generation,
1382 u64 owner, u64 empty_size, u64 hint_byte,
1383 u64 search_end, struct btrfs_key *ins, int data);
1384 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1385 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1387 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1388 struct btrfs_root *root, struct extent_buffer *orig_buf,
1389 struct extent_buffer *buf, int start_slot, int nr);
1390 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1391 *root, u64 bytenr, u64 num_bytes, u64 parent,
1392 u64 root_objectid, u64 ref_generation,
1393 u64 owner_objectid, int pin);
1394 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1395 struct btrfs_root *root,
1396 struct extent_io_tree *unpin);
1397 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1398 struct btrfs_root *root,
1399 u64 bytenr, u64 num_bytes, u64 parent,
1400 u64 root_objectid, u64 ref_generation,
1401 u64 owner_objectid);
1402 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1403 struct btrfs_root *root, u64 bytenr,
1404 u64 orig_parent, u64 parent,
1405 u64 root_objectid, u64 ref_generation,
1406 u64 owner_objectid);
1407 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1408 struct btrfs_root *root);
1409 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1410 int btrfs_read_block_groups(struct btrfs_root *root);
1411 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1412 struct btrfs_root *root, u64 bytes_used,
1413 u64 type, u64 chunk_objectid, u64 chunk_offset,
1415 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
1416 struct btrfs_root *root);
1417 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1418 struct btrfs_root *root, u64 bytenr, u64 num,
1419 int alloc, int mark_free);
1421 int btrfs_previous_item(struct btrfs_root *root,
1422 struct btrfs_path *path, u64 min_objectid,
1424 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1425 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1426 struct btrfs_root *root, struct extent_buffer *buf,
1427 struct extent_buffer *parent, int parent_slot,
1428 struct extent_buffer **cow_ret);
1429 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
1430 struct btrfs_root *root,
1431 struct extent_buffer *buf,
1432 struct extent_buffer *parent, int parent_slot,
1433 struct extent_buffer **cow_ret,
1434 u64 search_start, u64 empty_size);
1435 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1436 struct btrfs_root *root,
1437 struct extent_buffer *buf,
1438 struct extent_buffer **cow_ret, u64 new_root_objectid);
1439 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1440 *root, struct btrfs_path *path, u32 data_size);
1441 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1442 struct btrfs_root *root,
1443 struct btrfs_path *path,
1444 u32 new_size, int from_end);
1445 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1446 *root, struct btrfs_key *key, struct btrfs_path *p, int
1448 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1449 struct btrfs_root *root, struct extent_buffer *parent,
1450 int start_slot, int cache_only, u64 *last_ret,
1451 struct btrfs_key *progress);
1452 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1453 struct btrfs_path *btrfs_alloc_path(void);
1454 void btrfs_free_path(struct btrfs_path *p);
1455 void btrfs_init_path(struct btrfs_path *p);
1456 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1457 struct btrfs_path *path, int slot, int nr);
1459 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1460 struct btrfs_root *root,
1461 struct btrfs_path *path)
1463 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1466 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1467 *root, struct btrfs_key *key, void *data, u32 data_size);
1468 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1469 struct btrfs_root *root,
1470 struct btrfs_path *path,
1471 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1473 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1474 struct btrfs_root *root,
1475 struct btrfs_path *path,
1476 struct btrfs_key *key,
1479 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1482 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1483 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1484 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1485 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1487 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1488 struct btrfs_root *root, struct btrfs_path *path,
1489 struct btrfs_key *new_key);
1492 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1493 struct btrfs_key *key);
1494 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1495 *root, struct btrfs_key *key, struct btrfs_root_item
1497 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1498 *root, struct btrfs_key *key, struct btrfs_root_item
1500 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1501 btrfs_root_item *item, struct btrfs_key *key);
1502 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1503 struct btrfs_root *latest_root);
1505 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1506 *root, const char *name, int name_len, u64 dir,
1507 struct btrfs_key *location, u8 type);
1508 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1509 struct btrfs_root *root,
1510 struct btrfs_path *path, u64 dir,
1511 const char *name, int name_len,
1513 struct btrfs_dir_item *
1514 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1515 struct btrfs_root *root,
1516 struct btrfs_path *path, u64 dir,
1517 u64 objectid, const char *name, int name_len,
1519 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1520 struct btrfs_path *path,
1521 const char *name, int name_len);
1522 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1523 struct btrfs_root *root,
1524 struct btrfs_path *path,
1525 struct btrfs_dir_item *di);
1526 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1527 struct btrfs_root *root, const char *name,
1528 u16 name_len, const void *data, u16 data_len,
1530 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1531 struct btrfs_root *root,
1532 struct btrfs_path *path, u64 dir,
1533 const char *name, u16 name_len,
1536 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1537 struct btrfs_root *fs_root,
1538 u64 dirid, u64 *objectid);
1539 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1542 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1543 struct btrfs_root *root,
1544 const char *name, int name_len,
1545 u64 inode_objectid, u64 ref_objectid, u64 index);
1546 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1547 struct btrfs_root *root,
1548 const char *name, int name_len,
1549 u64 inode_objectid, u64 ref_objectid);
1550 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1551 struct btrfs_root *root,
1552 struct btrfs_path *path, u64 objectid);
1553 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1554 *root, u64 objectid, struct btrfs_inode_item
1556 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1557 *root, struct btrfs_path *path,
1558 struct btrfs_key *location, int mod);
1561 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1562 struct btrfs_root *root,
1563 u64 objectid, u64 pos, u64 offset,
1566 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
1567 struct btrfs_root *root, u64 objectid,
1568 u64 offset, char *buffer, size_t size);
1569 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1570 struct btrfs_root *root,
1571 struct btrfs_path *path, u64 objectid,
1572 u64 bytenr, int mod);
1573 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
1574 struct btrfs_root *root,
1575 struct btrfs_inode_item *inode,
1576 u64 objectid, u64 offset,
1577 char *data, size_t len);
1578 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1579 struct btrfs_root *root,
1580 struct btrfs_path *path,
1581 u64 objectid, u64 offset,
1583 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1584 struct btrfs_root *root, struct btrfs_path *path,