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 "_BFRfS_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)
256 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
259 * this is a very generous portion of the super block, giving us
260 * room to translate 14 chunks with 3 stripes each.
262 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
263 #define BTRFS_LABEL_SIZE 256
266 * the super block basically lists the main trees of the FS
267 * it currently lacks any block count etc etc
269 struct btrfs_super_block {
270 u8 csum[BTRFS_CSUM_SIZE];
271 /* the first 3 fields must match struct btrfs_header */
272 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
273 __le64 bytenr; /* this block number */
276 /* allowed to be different from the btrfs_header from here own down */
284 __le64 root_dir_objectid;
290 __le32 sys_chunk_array_size;
291 __le64 chunk_root_generation;
293 __le64 compat_ro_flags;
294 __le64 incompat_flags;
298 struct btrfs_dev_item dev_item;
299 char label[BTRFS_LABEL_SIZE];
300 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
301 } __attribute__ ((__packed__));
304 * Compat flags that we support. If any incompat flags are set other than the
305 * ones specified below then we will fail to mount
307 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
308 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
309 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
312 * A leaf is full of items. offset and size tell us where to find
313 * the item in the leaf (relative to the start of the data area)
316 struct btrfs_disk_key key;
319 } __attribute__ ((__packed__));
322 * leaves have an item area and a data area:
323 * [item0, item1....itemN] [free space] [dataN...data1, data0]
325 * The data is separate from the items to get the keys closer together
329 struct btrfs_header header;
330 struct btrfs_item items[];
331 } __attribute__ ((__packed__));
334 * all non-leaf blocks are nodes, they hold only keys and pointers to
337 struct btrfs_key_ptr {
338 struct btrfs_disk_key key;
341 } __attribute__ ((__packed__));
344 struct btrfs_header header;
345 struct btrfs_key_ptr ptrs[];
346 } __attribute__ ((__packed__));
349 * btrfs_paths remember the path taken from the root down to the leaf.
350 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
351 * to any other levels that are present.
353 * The slots array records the index of the item or block pointer
354 * used while walking the tree.
357 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
358 int slots[BTRFS_MAX_LEVEL];
364 * items in the extent btree are used to record the objectid of the
365 * owner of the block and the number of references
367 struct btrfs_extent_item {
369 } __attribute__ ((__packed__));
371 struct btrfs_extent_ref {
376 } __attribute__ ((__packed__));
378 /* dev extents record free space on individual devices. The owner
379 * field points back to the chunk allocation mapping tree that allocated
380 * the extent. The chunk tree uuid field is a way to double check the owner
382 struct btrfs_dev_extent {
384 __le64 chunk_objectid;
387 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
388 } __attribute__ ((__packed__));
390 struct btrfs_inode_ref {
394 } __attribute__ ((__packed__));
396 struct btrfs_timespec {
399 } __attribute__ ((__packed__));
402 BTRFS_COMPRESS_NONE = 0,
403 BTRFS_COMPRESS_ZLIB = 1,
404 BTRFS_COMPRESS_LAST = 2,
405 } btrfs_compression_type;
407 /* we don't understand any encryption methods right now */
409 BTRFS_ENCRYPTION_NONE = 0,
410 BTRFS_ENCRYPTION_LAST = 1,
411 } btrfs_encryption_type;
413 struct btrfs_inode_item {
414 /* nfs style generation number */
416 /* transid that last touched this inode */
428 struct btrfs_timespec atime;
429 struct btrfs_timespec ctime;
430 struct btrfs_timespec mtime;
431 struct btrfs_timespec otime;
432 } __attribute__ ((__packed__));
434 struct btrfs_dir_item {
435 struct btrfs_disk_key location;
440 } __attribute__ ((__packed__));
442 struct btrfs_root_item {
443 struct btrfs_inode_item inode;
449 __le64 last_snapshot;
452 struct btrfs_disk_key drop_progress;
455 } __attribute__ ((__packed__));
458 * this is used for both forward and backward root refs
460 struct btrfs_root_ref {
464 } __attribute__ ((__packed__));
466 #define BTRFS_FILE_EXTENT_INLINE 0
467 #define BTRFS_FILE_EXTENT_REG 1
468 #define BTRFS_FILE_EXTENT_PREALLOC 2
470 struct btrfs_file_extent_item {
472 * transaction id that created this extent
476 * max number of bytes to hold this extent in ram
477 * when we split a compressed extent we can't know how big
478 * each of the resulting pieces will be. So, this is
479 * an upper limit on the size of the extent in ram instead of
485 * 32 bits for the various ways we might encode the data,
486 * including compression and encryption. If any of these
487 * are set to something a given disk format doesn't understand
488 * it is treated like an incompat flag for reading and writing,
493 __le16 other_encoding; /* spare for later use */
495 /* are we inline data or a real extent? */
499 * disk space consumed by the extent, checksum blocks are included
503 __le64 disk_num_bytes;
505 * the logical offset in file blocks (no csums)
506 * this extent record is for. This allows a file extent to point
507 * into the middle of an existing extent on disk, sharing it
508 * between two snapshots (useful if some bytes in the middle of the
509 * extent have changed
513 * the logical number of file blocks (no csums included)
517 } __attribute__ ((__packed__));
519 struct btrfs_csum_item {
521 } __attribute__ ((__packed__));
523 /* tag for the radix tree of block groups in ram */
524 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
525 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
526 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
527 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
528 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
529 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
530 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
532 struct btrfs_block_group_item {
534 __le64 chunk_objectid;
536 } __attribute__ ((__packed__));
538 struct btrfs_space_info {
544 struct list_head list;
547 struct btrfs_block_group_cache {
548 struct cache_extent cache;
549 struct btrfs_key key;
550 struct btrfs_block_group_item item;
551 struct btrfs_space_info *space_info;
558 struct btrfs_extent_ops {
559 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
560 u64 hint_byte, struct btrfs_key *ins);
561 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
566 struct btrfs_fs_devices;
567 struct btrfs_fs_info {
568 u8 fsid[BTRFS_FSID_SIZE];
569 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
570 struct btrfs_root *fs_root;
571 struct btrfs_root *extent_root;
572 struct btrfs_root *tree_root;
573 struct btrfs_root *chunk_root;
574 struct btrfs_root *dev_root;
576 /* the log root tree is a directory of all the other log roots */
577 struct btrfs_root *log_root_tree;
579 struct extent_io_tree extent_cache;
580 struct extent_io_tree free_space_cache;
581 struct extent_io_tree block_group_cache;
582 struct extent_io_tree pinned_extents;
583 struct extent_io_tree pending_del;
584 struct extent_io_tree extent_ins;
586 /* logical->physical extent mapping */
587 struct btrfs_mapping_tree mapping_tree;
590 u64 last_trans_committed;
592 u64 avail_data_alloc_bits;
593 u64 avail_metadata_alloc_bits;
594 u64 avail_system_alloc_bits;
595 u64 data_alloc_profile;
596 u64 metadata_alloc_profile;
597 u64 system_alloc_profile;
600 struct btrfs_trans_handle *running_transaction;
601 struct btrfs_super_block super_copy;
602 struct extent_buffer *sb_buffer;
603 struct mutex fs_mutex;
606 struct btrfs_extent_ops *extent_ops;
607 struct list_head dirty_cowonly_roots;
609 struct btrfs_fs_devices *fs_devices;
610 struct list_head space_info;
616 * in ram representation of the tree. extent_root is used for all allocations
617 * and for the extent tree extent_root root.
620 struct extent_buffer *node;
621 struct extent_buffer *commit_root;
622 struct btrfs_root_item root_item;
623 struct btrfs_key root_key;
624 struct btrfs_fs_info *fs_info;
628 /* data allocations are done in sectorsize units */
631 /* node allocations are done in nodesize units */
634 /* leaf allocations are done in leafsize units */
637 /* leaf allocations are done in leafsize units */
646 u64 last_inode_alloc;
648 /* the dirty list is only used by non-reference counted roots */
649 struct list_head dirty_list;
653 * inode items have the data typically returned from stat and store other
654 * info about object characteristics. There is one for every file and dir in
657 #define BTRFS_INODE_ITEM_KEY 1
658 #define BTRFS_INODE_REF_KEY 12
659 #define BTRFS_XATTR_ITEM_KEY 24
660 #define BTRFS_ORPHAN_ITEM_KEY 48
662 #define BTRFS_DIR_LOG_ITEM_KEY 60
663 #define BTRFS_DIR_LOG_INDEX_KEY 72
665 * dir items are the name -> inode pointers in a directory. There is one
666 * for every name in a directory.
668 #define BTRFS_DIR_ITEM_KEY 84
669 #define BTRFS_DIR_INDEX_KEY 96
672 * extent data is for file data
674 #define BTRFS_EXTENT_DATA_KEY 108
677 * csum items have the checksums for data in the extents
679 #define BTRFS_CSUM_ITEM_KEY 120
682 * root items point to tree roots. There are typically in the root
683 * tree used by the super block to find all the other trees
685 #define BTRFS_ROOT_ITEM_KEY 132
688 * root backrefs tie subvols and snapshots to the directory entries that
691 #define BTRFS_ROOT_BACKREF_KEY 144
694 * root refs make a fast index for listing all of the snapshots and
695 * subvolumes referenced by a given root. They point directly to the
696 * directory item in the root that references the subvol
698 #define BTRFS_ROOT_REF_KEY 156
701 * extent items are in the extent map tree. These record which blocks
702 * are used, and how many references there are to each block
704 #define BTRFS_EXTENT_ITEM_KEY 168
705 #define BTRFS_EXTENT_REF_KEY 180
708 * block groups give us hints into the extent allocation trees. Which
709 * blocks are free etc etc
711 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
713 #define BTRFS_DEV_EXTENT_KEY 204
714 #define BTRFS_DEV_ITEM_KEY 216
715 #define BTRFS_CHUNK_ITEM_KEY 228
718 * string items are for debugging. They just store a short string of
721 #define BTRFS_STRING_ITEM_KEY 253
725 #define BTRFS_INODE_NODATASUM (1 << 0)
726 #define BTRFS_INODE_NODATACOW (1 << 1)
727 #define BTRFS_INODE_READONLY (1 << 2)
729 #define read_eb_member(eb, ptr, type, member, result) ( \
730 read_extent_buffer(eb, (char *)(result), \
731 ((unsigned long)(ptr)) + \
732 offsetof(type, member), \
733 sizeof(((type *)0)->member)))
735 #define write_eb_member(eb, ptr, type, member, result) ( \
736 write_extent_buffer(eb, (char *)(result), \
737 ((unsigned long)(ptr)) + \
738 offsetof(type, member), \
739 sizeof(((type *)0)->member)))
741 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
742 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
744 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
745 return le##bits##_to_cpu(h->member); \
747 static inline void btrfs_set_##name(struct extent_buffer *eb, \
750 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
751 h->member = cpu_to_le##bits(val); \
754 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
755 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
758 unsigned long offset = (unsigned long)s; \
759 type *p = (type *) (eb->data + offset); \
760 return le##bits##_to_cpu(p->member); \
762 static inline void btrfs_set_##name(struct extent_buffer *eb, \
763 type *s, u##bits val) \
765 unsigned long offset = (unsigned long)s; \
766 type *p = (type *) (eb->data + offset); \
767 p->member = cpu_to_le##bits(val); \
770 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
771 static inline u##bits btrfs_##name(type *s) \
773 return le##bits##_to_cpu(s->member); \
775 static inline void btrfs_set_##name(type *s, u##bits val) \
777 s->member = cpu_to_le##bits(val); \
780 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
781 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
782 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
783 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
784 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
785 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
786 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
787 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
788 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
789 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
790 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
792 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
793 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
795 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
797 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
799 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
801 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
803 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
804 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
806 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
808 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
810 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
813 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
815 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
818 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
820 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
823 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
824 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
825 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
826 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
827 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
828 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
829 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
830 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
831 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
832 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
833 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
835 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
837 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
840 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
841 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
842 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
844 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
846 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
848 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
850 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
851 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
853 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
855 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
856 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
858 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
861 unsigned long offset = (unsigned long)c;
862 offset += offsetof(struct btrfs_chunk, stripe);
863 offset += nr * sizeof(struct btrfs_stripe);
864 return (struct btrfs_stripe *)offset;
867 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
869 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
872 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
873 struct btrfs_chunk *c, int nr)
875 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
878 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
879 struct btrfs_chunk *c, int nr,
882 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
885 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
886 struct btrfs_chunk *c, int nr)
888 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
891 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
892 struct btrfs_chunk *c, int nr,
895 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
898 /* struct btrfs_block_group_item */
899 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
901 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
903 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
904 struct btrfs_block_group_item, chunk_objectid, 64);
906 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
907 struct btrfs_block_group_item, chunk_objectid, 64);
908 BTRFS_SETGET_FUNCS(disk_block_group_flags,
909 struct btrfs_block_group_item, flags, 64);
910 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
911 struct btrfs_block_group_item, flags, 64);
913 /* struct btrfs_inode_ref */
914 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
915 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
917 /* struct btrfs_inode_item */
918 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
919 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
920 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
921 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
922 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
923 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
924 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
925 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
926 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
927 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
928 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
930 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
931 struct btrfs_inode_item, generation, 64);
932 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
933 struct btrfs_inode_item, size, 64);
934 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
935 struct btrfs_inode_item, nbytes, 64);
936 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
937 struct btrfs_inode_item, block_group, 64);
938 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
939 struct btrfs_inode_item, nlink, 32);
940 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
941 struct btrfs_inode_item, uid, 32);
942 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
943 struct btrfs_inode_item, gid, 32);
944 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
945 struct btrfs_inode_item, mode, 32);
946 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
947 struct btrfs_inode_item, rdev, 64);
948 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
949 struct btrfs_inode_item, flags, 64);
951 static inline struct btrfs_timespec *
952 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
954 unsigned long ptr = (unsigned long)inode_item;
955 ptr += offsetof(struct btrfs_inode_item, atime);
956 return (struct btrfs_timespec *)ptr;
959 static inline struct btrfs_timespec *
960 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
962 unsigned long ptr = (unsigned long)inode_item;
963 ptr += offsetof(struct btrfs_inode_item, mtime);
964 return (struct btrfs_timespec *)ptr;
967 static inline struct btrfs_timespec *
968 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
970 unsigned long ptr = (unsigned long)inode_item;
971 ptr += offsetof(struct btrfs_inode_item, ctime);
972 return (struct btrfs_timespec *)ptr;
975 static inline struct btrfs_timespec *
976 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
978 unsigned long ptr = (unsigned long)inode_item;
979 ptr += offsetof(struct btrfs_inode_item, otime);
980 return (struct btrfs_timespec *)ptr;
983 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
984 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
985 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
987 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
990 /* struct btrfs_dev_extent */
991 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
993 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
995 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
997 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
999 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1001 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1002 return (u8 *)((unsigned long)dev + ptr);
1005 /* struct btrfs_extent_ref */
1006 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1007 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1008 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1009 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1011 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1012 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1014 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1016 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1019 /* struct btrfs_extent_item */
1020 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1021 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1024 /* struct btrfs_node */
1025 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1026 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1028 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1031 ptr = offsetof(struct btrfs_node, ptrs) +
1032 sizeof(struct btrfs_key_ptr) * nr;
1033 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1036 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1040 ptr = offsetof(struct btrfs_node, ptrs) +
1041 sizeof(struct btrfs_key_ptr) * nr;
1042 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1045 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1048 ptr = offsetof(struct btrfs_node, ptrs) +
1049 sizeof(struct btrfs_key_ptr) * nr;
1050 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1053 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1057 ptr = offsetof(struct btrfs_node, ptrs) +
1058 sizeof(struct btrfs_key_ptr) * nr;
1059 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1062 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1064 return offsetof(struct btrfs_node, ptrs) +
1065 sizeof(struct btrfs_key_ptr) * nr;
1068 static inline void btrfs_node_key(struct extent_buffer *eb,
1069 struct btrfs_disk_key *disk_key, int nr)
1072 ptr = btrfs_node_key_ptr_offset(nr);
1073 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1074 struct btrfs_key_ptr, key, disk_key);
1077 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1078 struct btrfs_disk_key *disk_key, int nr)
1081 ptr = btrfs_node_key_ptr_offset(nr);
1082 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1083 struct btrfs_key_ptr, key, disk_key);
1086 /* struct btrfs_item */
1087 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1088 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1090 static inline unsigned long btrfs_item_nr_offset(int nr)
1092 return offsetof(struct btrfs_leaf, items) +
1093 sizeof(struct btrfs_item) * nr;
1096 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1099 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1102 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1103 struct btrfs_item *item)
1105 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1108 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1110 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1113 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1115 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1118 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1120 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1123 static inline void btrfs_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 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1130 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1131 struct btrfs_disk_key *disk_key, int nr)
1133 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1134 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1138 * struct btrfs_root_ref
1140 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1141 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1142 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1144 /* struct btrfs_dir_item */
1145 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1146 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1147 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1148 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1150 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1151 struct btrfs_dir_item *item,
1152 struct btrfs_disk_key *key)
1154 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1157 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1158 struct btrfs_dir_item *item,
1159 struct btrfs_disk_key *key)
1161 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1164 /* struct btrfs_disk_key */
1165 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1167 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1168 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1170 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1171 struct btrfs_disk_key *disk)
1173 cpu->offset = le64_to_cpu(disk->offset);
1174 cpu->type = disk->type;
1175 cpu->objectid = le64_to_cpu(disk->objectid);
1178 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1179 struct btrfs_key *cpu)
1181 disk->offset = cpu_to_le64(cpu->offset);
1182 disk->type = cpu->type;
1183 disk->objectid = cpu_to_le64(cpu->objectid);
1186 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1187 struct btrfs_key *key, int nr)
1189 struct btrfs_disk_key disk_key;
1190 btrfs_node_key(eb, &disk_key, nr);
1191 btrfs_disk_key_to_cpu(key, &disk_key);
1194 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1195 struct btrfs_key *key, int nr)
1197 struct btrfs_disk_key disk_key;
1198 btrfs_item_key(eb, &disk_key, nr);
1199 btrfs_disk_key_to_cpu(key, &disk_key);
1202 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1203 struct btrfs_dir_item *item,
1204 struct btrfs_key *key)
1206 struct btrfs_disk_key disk_key;
1207 btrfs_dir_item_key(eb, item, &disk_key);
1208 btrfs_disk_key_to_cpu(key, &disk_key);
1212 static inline u8 btrfs_key_type(struct btrfs_key *key)
1217 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1222 /* struct btrfs_header */
1223 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1224 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1226 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1227 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1228 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1229 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1231 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1233 return (btrfs_header_flags(eb) & flag) == flag;
1236 static inline int btrfs_set_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 int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1245 u64 flags = btrfs_header_flags(eb);
1246 btrfs_set_header_flags(eb, flags & ~flag);
1247 return (flags & flag) == flag;
1250 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1252 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1256 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1258 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1262 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1264 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1268 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1270 unsigned long ptr = offsetof(struct btrfs_header, csum);
1274 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1279 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1284 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1289 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1291 return (btrfs_header_level(eb) == 0);
1294 /* struct btrfs_root_item */
1295 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1297 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1298 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1299 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1301 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1303 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1304 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1305 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1306 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1307 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1308 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1309 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1310 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1314 /* struct btrfs_super_block */
1315 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1316 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1317 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1319 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1320 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1321 struct btrfs_super_block, sys_chunk_array_size, 32);
1322 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1323 struct btrfs_super_block, chunk_root_generation, 64);
1324 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1326 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1328 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1329 chunk_root_level, 8);
1330 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1332 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1334 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1336 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1338 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1340 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1342 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1344 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1346 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1347 root_dir_objectid, 64);
1348 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1350 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1352 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1354 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1355 incompat_flags, 64);
1357 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1359 return offsetof(struct btrfs_leaf, items);
1362 /* struct btrfs_file_extent_item */
1363 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1365 static inline unsigned long btrfs_file_extent_inline_start(struct
1366 btrfs_file_extent_item *e)
1368 unsigned long offset = (unsigned long)e;
1369 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1373 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1375 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1378 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1380 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1382 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1383 disk_num_bytes, 64);
1384 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1386 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1388 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1390 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1392 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1394 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1395 other_encoding, 16);
1397 /* this returns the number of file bytes represented by the inline item.
1398 * If an item is compressed, this is the uncompressed size
1400 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1401 struct btrfs_file_extent_item *e)
1403 return btrfs_file_extent_ram_bytes(eb, e);
1407 * this returns the number of bytes used by the item on disk, minus the
1408 * size of any extent headers. If a file is compressed on disk, this is
1409 * the compressed size
1411 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1412 struct btrfs_item *e)
1414 unsigned long offset;
1415 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1416 return btrfs_item_size(eb, e) - offset;
1419 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1421 return root->leafsize;
1422 return root->nodesize;
1425 /* helper function to cast into the data area of the leaf. */
1426 #define btrfs_item_ptr(leaf, slot, type) \
1427 ((type *)(btrfs_leaf_data(leaf) + \
1428 btrfs_item_offset_nr(leaf, slot)))
1430 #define btrfs_item_ptr_offset(leaf, slot) \
1431 ((unsigned long)(btrfs_leaf_data(leaf) + \
1432 btrfs_item_offset_nr(leaf, slot)))
1435 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1436 struct btrfs_root *root);
1437 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1438 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1439 btrfs_fs_info *info,
1441 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1442 struct btrfs_block_group_cache
1443 *hint, u64 search_start,
1444 int data, int owner);
1445 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1446 struct btrfs_root *root,
1447 u32 blocksize, u64 parent,
1453 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1454 struct btrfs_root *root,
1455 u64 num_bytes, u64 parent,
1456 u64 root_objectid, u64 ref_generation,
1457 u64 owner, u64 empty_size, u64 hint_byte,
1458 u64 search_end, struct btrfs_key *ins, int data);
1459 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1460 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1462 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1463 struct btrfs_root *root, struct extent_buffer *orig_buf,
1464 struct extent_buffer *buf, int start_slot, int nr);
1465 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1466 *root, u64 bytenr, u64 num_bytes, u64 parent,
1467 u64 root_objectid, u64 ref_generation,
1468 u64 owner_objectid, int pin);
1469 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1470 struct btrfs_root *root,
1471 struct extent_io_tree *unpin);
1472 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1473 struct btrfs_root *root,
1474 u64 bytenr, u64 num_bytes, u64 parent,
1475 u64 root_objectid, u64 ref_generation,
1476 u64 owner_objectid);
1477 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1478 struct btrfs_root *root, u64 bytenr,
1479 u64 orig_parent, u64 parent,
1480 u64 root_objectid, u64 ref_generation,
1481 u64 owner_objectid);
1482 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1483 struct btrfs_root *root);
1484 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1485 int btrfs_read_block_groups(struct btrfs_root *root);
1486 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1487 struct btrfs_root *root, u64 bytes_used,
1488 u64 type, u64 chunk_objectid, u64 chunk_offset,
1490 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
1491 struct btrfs_root *root);
1492 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1493 struct btrfs_root *root, u64 bytenr, u64 num,
1494 int alloc, int mark_free);
1496 int btrfs_previous_item(struct btrfs_root *root,
1497 struct btrfs_path *path, u64 min_objectid,
1499 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1500 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1501 struct btrfs_root *root, struct extent_buffer *buf,
1502 struct extent_buffer *parent, int parent_slot,
1503 struct extent_buffer **cow_ret);
1504 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
1505 struct btrfs_root *root,
1506 struct extent_buffer *buf,
1507 struct extent_buffer *parent, int parent_slot,
1508 struct extent_buffer **cow_ret,
1509 u64 search_start, u64 empty_size);
1510 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1511 struct btrfs_root *root,
1512 struct extent_buffer *buf,
1513 struct extent_buffer **cow_ret, u64 new_root_objectid);
1514 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1515 *root, struct btrfs_path *path, u32 data_size);
1516 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1517 struct btrfs_root *root,
1518 struct btrfs_path *path,
1519 u32 new_size, int from_end);
1520 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1521 *root, struct btrfs_key *key, struct btrfs_path *p, int
1523 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1524 struct btrfs_root *root, struct extent_buffer *parent,
1525 int start_slot, int cache_only, u64 *last_ret,
1526 struct btrfs_key *progress);
1527 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1528 struct btrfs_path *btrfs_alloc_path(void);
1529 void btrfs_free_path(struct btrfs_path *p);
1530 void btrfs_init_path(struct btrfs_path *p);
1531 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1532 struct btrfs_path *path, int slot, int nr);
1534 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1535 struct btrfs_root *root,
1536 struct btrfs_path *path)
1538 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1541 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1542 *root, struct btrfs_key *key, void *data, u32 data_size);
1543 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1544 struct btrfs_root *root,
1545 struct btrfs_path *path,
1546 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1548 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1549 struct btrfs_root *root,
1550 struct btrfs_path *path,
1551 struct btrfs_key *key,
1554 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1557 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1558 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1559 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1560 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1562 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1563 struct btrfs_root *root, struct btrfs_path *path,
1564 struct btrfs_key *new_key);
1567 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1568 struct btrfs_key *key);
1569 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1570 *root, struct btrfs_key *key, struct btrfs_root_item
1572 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1573 *root, struct btrfs_key *key, struct btrfs_root_item
1575 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1576 btrfs_root_item *item, struct btrfs_key *key);
1577 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1578 struct btrfs_root *latest_root);
1580 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1581 *root, const char *name, int name_len, u64 dir,
1582 struct btrfs_key *location, u8 type);
1583 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1584 struct btrfs_root *root,
1585 struct btrfs_path *path, u64 dir,
1586 const char *name, int name_len,
1588 struct btrfs_dir_item *
1589 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1590 struct btrfs_root *root,
1591 struct btrfs_path *path, u64 dir,
1592 u64 objectid, const char *name, int name_len,
1594 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1595 struct btrfs_path *path,
1596 const char *name, int name_len);
1597 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1598 struct btrfs_root *root,
1599 struct btrfs_path *path,
1600 struct btrfs_dir_item *di);
1601 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1602 struct btrfs_root *root, const char *name,
1603 u16 name_len, const void *data, u16 data_len,
1605 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1606 struct btrfs_root *root,
1607 struct btrfs_path *path, u64 dir,
1608 const char *name, u16 name_len,
1611 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1612 struct btrfs_root *fs_root,
1613 u64 dirid, u64 *objectid);
1614 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1617 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1618 struct btrfs_root *root,
1619 const char *name, int name_len,
1620 u64 inode_objectid, u64 ref_objectid, u64 index);
1621 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1622 struct btrfs_root *root,
1623 const char *name, int name_len,
1624 u64 inode_objectid, u64 ref_objectid);
1625 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1626 struct btrfs_root *root,
1627 struct btrfs_path *path, u64 objectid);
1628 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1629 *root, u64 objectid, struct btrfs_inode_item
1631 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1632 *root, struct btrfs_path *path,
1633 struct btrfs_key *location, int mod);
1636 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1637 struct btrfs_root *root,
1638 u64 objectid, u64 pos, u64 offset,
1641 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
1642 struct btrfs_root *root, u64 objectid,
1643 u64 offset, char *buffer, size_t size);
1644 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1645 struct btrfs_root *root,
1646 struct btrfs_path *path, u64 objectid,
1647 u64 bytenr, int mod);
1648 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
1649 struct btrfs_root *root,
1650 struct btrfs_inode_item *inode,
1651 u64 objectid, u64 offset,
1652 char *data, size_t len);
1653 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1654 struct btrfs_root *root,
1655 struct btrfs_path *path,
1656 u64 objectid, u64 offset,
1658 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1659 struct btrfs_root *root, struct btrfs_path *path,