2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
23 #include "kerncompat.h"
24 #include "radix-tree.h"
25 #include "extent-cache.h"
26 #include "extent_io.h"
29 struct btrfs_trans_handle;
30 #define BTRFS_MAGIC "_BHRfS_M"
32 #define BTRFS_MAX_LEVEL 8
34 /* holds pointers to all of the tree roots */
35 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
37 /* stores information about which extents are in use, and reference counts */
38 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
41 * chunk tree stores translations from logical -> physical block numbering
42 * the super block points to the chunk tree
44 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
47 * stores information about which areas of a given device are in use.
48 * one per device. The tree of tree roots points to the device tree
50 #define BTRFS_DEV_TREE_OBJECTID 4ULL
52 /* one per subvolume, storing files and directories */
53 #define BTRFS_FS_TREE_OBJECTID 5ULL
55 /* directory objectid inside the root tree */
56 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
57 /* holds checksums of all the data extents */
58 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
61 /* oprhan objectid for tracking unlinked/truncated files */
62 #define BTRFS_ORPHAN_OBJECTID -5ULL
64 /* does write ahead logging to speed up fsyncs */
65 #define BTRFS_TREE_LOG_OBJECTID -6ULL
66 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
69 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
70 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
73 * extent checksums all have this objectid
74 * this allows them to share the logging tree
77 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
79 /* dummy objectid represents multiple objectids */
80 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
83 * All files have objectids in this range.
85 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
86 #define BTRFS_LAST_FREE_OBJECTID -256ULL
87 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
92 * the device items go into the chunk tree. The key is in the form
93 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
95 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
98 * we can actually store much bigger names, but lets not confuse the rest
101 #define BTRFS_NAME_LEN 255
103 /* 32 bytes in various csum fields */
104 #define BTRFS_CSUM_SIZE 32
107 #define BTRFS_CSUM_TYPE_CRC32 0
111 #define BTRFS_CSUM_TYPE_CRC32 0
113 static int btrfs_csum_sizes[] = { 4, 0 };
115 /* four bytes for CRC32 */
116 #define BTRFS_CRC32_SIZE 4
117 #define BTRFS_EMPTY_DIR_SIZE 0
119 #define BTRFS_FT_UNKNOWN 0
120 #define BTRFS_FT_REG_FILE 1
121 #define BTRFS_FT_DIR 2
122 #define BTRFS_FT_CHRDEV 3
123 #define BTRFS_FT_BLKDEV 4
124 #define BTRFS_FT_FIFO 5
125 #define BTRFS_FT_SOCK 6
126 #define BTRFS_FT_SYMLINK 7
127 #define BTRFS_FT_XATTR 8
128 #define BTRFS_FT_MAX 9
131 * the key defines the order in the tree, and so it also defines (optimal)
132 * block layout. objectid corresonds to the inode number. The flags
133 * tells us things about the object, and is a kind of stream selector.
134 * so for a given inode, keys with flags of 1 might refer to the inode
135 * data, flags of 2 may point to file data in the btree and flags == 3
136 * may point to extents.
138 * offset is the starting byte offset for this key in the stream.
140 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
141 * in cpu native order. Otherwise they are identical and their sizes
142 * should be the same (ie both packed)
144 struct btrfs_disk_key {
148 } __attribute__ ((__packed__));
154 } __attribute__ ((__packed__));
156 struct btrfs_mapping_tree {
157 struct cache_tree cache_tree;
160 #define BTRFS_UUID_SIZE 16
161 struct btrfs_dev_item {
162 /* the internal btrfs device id */
165 /* size of the device */
171 /* optimal io alignment for this device */
174 /* optimal io width for this device */
177 /* minimal io size for this device */
180 /* type and info about this device */
183 /* expected generation for this device */
186 /* grouping information for allocation decisions */
189 /* seek speed 0-100 where 100 is fastest */
192 /* bandwidth 0-100 where 100 is fastest */
195 /* btrfs generated uuid for this device */
196 u8 uuid[BTRFS_UUID_SIZE];
198 /* uuid of FS who owns this device */
199 u8 fsid[BTRFS_UUID_SIZE];
200 } __attribute__ ((__packed__));
202 struct btrfs_stripe {
205 u8 dev_uuid[BTRFS_UUID_SIZE];
206 } __attribute__ ((__packed__));
209 /* size of this chunk in bytes */
212 /* objectid of the root referencing this chunk */
218 /* optimal io alignment for this chunk */
221 /* optimal io width for this chunk */
224 /* minimal io size for this chunk */
227 /* 2^16 stripes is quite a lot, a second limit is the size of a single
232 /* sub stripes only matter for raid10 */
234 struct btrfs_stripe stripe;
235 /* additional stripes go here */
236 } __attribute__ ((__packed__));
238 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
240 BUG_ON(num_stripes == 0);
241 return sizeof(struct btrfs_chunk) +
242 sizeof(struct btrfs_stripe) * (num_stripes - 1);
245 #define BTRFS_FSID_SIZE 16
246 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
249 * every tree block (leaf or node) starts with this header.
251 struct btrfs_header {
252 /* these first four must match the super block */
253 u8 csum[BTRFS_CSUM_SIZE];
254 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
255 __le64 bytenr; /* which block this node is supposed to live in */
258 /* allowed to be different from the super from here on down */
259 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
264 } __attribute__ ((__packed__));
266 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
267 sizeof(struct btrfs_header)) / \
268 sizeof(struct btrfs_key_ptr))
269 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
270 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
271 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
272 sizeof(struct btrfs_item) - \
273 sizeof(struct btrfs_file_extent_item))
275 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
276 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
279 * this is a very generous portion of the super block, giving us
280 * room to translate 14 chunks with 3 stripes each.
282 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
283 #define BTRFS_LABEL_SIZE 256
286 * the super block basically lists the main trees of the FS
287 * it currently lacks any block count etc etc
289 struct btrfs_super_block {
290 u8 csum[BTRFS_CSUM_SIZE];
291 /* the first 3 fields must match struct btrfs_header */
292 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
293 __le64 bytenr; /* this block number */
296 /* allowed to be different from the btrfs_header from here own down */
304 __le64 root_dir_objectid;
310 __le32 sys_chunk_array_size;
311 __le64 chunk_root_generation;
313 __le64 compat_ro_flags;
314 __le64 incompat_flags;
319 struct btrfs_dev_item dev_item;
320 char label[BTRFS_LABEL_SIZE];
321 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
322 } __attribute__ ((__packed__));
325 * Compat flags that we support. If any incompat flags are set other than the
326 * ones specified below then we will fail to mount
328 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
329 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
330 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
333 * A leaf is full of items. offset and size tell us where to find
334 * the item in the leaf (relative to the start of the data area)
337 struct btrfs_disk_key key;
340 } __attribute__ ((__packed__));
343 * leaves have an item area and a data area:
344 * [item0, item1....itemN] [free space] [dataN...data1, data0]
346 * The data is separate from the items to get the keys closer together
350 struct btrfs_header header;
351 struct btrfs_item items[];
352 } __attribute__ ((__packed__));
355 * all non-leaf blocks are nodes, they hold only keys and pointers to
358 struct btrfs_key_ptr {
359 struct btrfs_disk_key key;
362 } __attribute__ ((__packed__));
365 struct btrfs_header header;
366 struct btrfs_key_ptr ptrs[];
367 } __attribute__ ((__packed__));
370 * btrfs_paths remember the path taken from the root down to the leaf.
371 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
372 * to any other levels that are present.
374 * The slots array records the index of the item or block pointer
375 * used while walking the tree.
378 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
379 int slots[BTRFS_MAX_LEVEL];
385 * items in the extent btree are used to record the objectid of the
386 * owner of the block and the number of references
388 struct btrfs_extent_item {
390 } __attribute__ ((__packed__));
392 struct btrfs_extent_ref {
397 } __attribute__ ((__packed__));
399 /* dev extents record free space on individual devices. The owner
400 * field points back to the chunk allocation mapping tree that allocated
401 * the extent. The chunk tree uuid field is a way to double check the owner
403 struct btrfs_dev_extent {
405 __le64 chunk_objectid;
408 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
409 } __attribute__ ((__packed__));
411 struct btrfs_inode_ref {
415 } __attribute__ ((__packed__));
417 struct btrfs_timespec {
420 } __attribute__ ((__packed__));
423 BTRFS_COMPRESS_NONE = 0,
424 BTRFS_COMPRESS_ZLIB = 1,
425 BTRFS_COMPRESS_LAST = 2,
426 } btrfs_compression_type;
428 /* we don't understand any encryption methods right now */
430 BTRFS_ENCRYPTION_NONE = 0,
431 BTRFS_ENCRYPTION_LAST = 1,
432 } btrfs_encryption_type;
434 struct btrfs_inode_item {
435 /* nfs style generation number */
437 /* transid that last touched this inode */
449 struct btrfs_timespec atime;
450 struct btrfs_timespec ctime;
451 struct btrfs_timespec mtime;
452 struct btrfs_timespec otime;
453 } __attribute__ ((__packed__));
455 struct btrfs_dir_item {
456 struct btrfs_disk_key location;
461 } __attribute__ ((__packed__));
463 struct btrfs_root_item {
464 struct btrfs_inode_item inode;
470 __le64 last_snapshot;
473 struct btrfs_disk_key drop_progress;
476 } __attribute__ ((__packed__));
479 * this is used for both forward and backward root refs
481 struct btrfs_root_ref {
485 } __attribute__ ((__packed__));
487 #define BTRFS_FILE_EXTENT_INLINE 0
488 #define BTRFS_FILE_EXTENT_REG 1
489 #define BTRFS_FILE_EXTENT_PREALLOC 2
491 struct btrfs_file_extent_item {
493 * transaction id that created this extent
497 * max number of bytes to hold this extent in ram
498 * when we split a compressed extent we can't know how big
499 * each of the resulting pieces will be. So, this is
500 * an upper limit on the size of the extent in ram instead of
506 * 32 bits for the various ways we might encode the data,
507 * including compression and encryption. If any of these
508 * are set to something a given disk format doesn't understand
509 * it is treated like an incompat flag for reading and writing,
514 __le16 other_encoding; /* spare for later use */
516 /* are we inline data or a real extent? */
520 * disk space consumed by the extent, checksum blocks are included
524 __le64 disk_num_bytes;
526 * the logical offset in file blocks (no csums)
527 * this extent record is for. This allows a file extent to point
528 * into the middle of an existing extent on disk, sharing it
529 * between two snapshots (useful if some bytes in the middle of the
530 * extent have changed
534 * the logical number of file blocks (no csums included)
538 } __attribute__ ((__packed__));
540 struct btrfs_csum_item {
542 } __attribute__ ((__packed__));
544 /* tag for the radix tree of block groups in ram */
545 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
546 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
547 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
548 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
549 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
550 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
551 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
553 struct btrfs_block_group_item {
555 __le64 chunk_objectid;
557 } __attribute__ ((__packed__));
559 struct btrfs_space_info {
565 struct list_head list;
568 struct btrfs_block_group_cache {
569 struct cache_extent cache;
570 struct btrfs_key key;
571 struct btrfs_block_group_item item;
572 struct btrfs_space_info *space_info;
579 struct btrfs_extent_ops {
580 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
581 u64 hint_byte, struct btrfs_key *ins);
582 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
587 struct btrfs_fs_devices;
588 struct btrfs_fs_info {
589 u8 fsid[BTRFS_FSID_SIZE];
590 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
591 struct btrfs_root *fs_root;
592 struct btrfs_root *extent_root;
593 struct btrfs_root *tree_root;
594 struct btrfs_root *chunk_root;
595 struct btrfs_root *dev_root;
596 struct btrfs_root *csum_root;
598 /* the log root tree is a directory of all the other log roots */
599 struct btrfs_root *log_root_tree;
601 struct extent_io_tree extent_cache;
602 struct extent_io_tree free_space_cache;
603 struct extent_io_tree block_group_cache;
604 struct extent_io_tree pinned_extents;
605 struct extent_io_tree pending_del;
606 struct extent_io_tree extent_ins;
608 /* logical->physical extent mapping */
609 struct btrfs_mapping_tree mapping_tree;
612 u64 last_trans_committed;
614 u64 avail_data_alloc_bits;
615 u64 avail_metadata_alloc_bits;
616 u64 avail_system_alloc_bits;
617 u64 data_alloc_profile;
618 u64 metadata_alloc_profile;
619 u64 system_alloc_profile;
622 struct btrfs_trans_handle *running_transaction;
623 struct btrfs_super_block super_copy;
624 struct extent_buffer *sb_buffer;
625 struct mutex fs_mutex;
628 struct btrfs_extent_ops *extent_ops;
629 struct list_head dirty_cowonly_roots;
631 struct btrfs_fs_devices *fs_devices;
632 struct list_head space_info;
638 * in ram representation of the tree. extent_root is used for all allocations
639 * and for the extent tree extent_root root.
642 struct extent_buffer *node;
643 struct extent_buffer *commit_root;
644 struct btrfs_root_item root_item;
645 struct btrfs_key root_key;
646 struct btrfs_fs_info *fs_info;
650 /* data allocations are done in sectorsize units */
653 /* node allocations are done in nodesize units */
656 /* leaf allocations are done in leafsize units */
659 /* leaf allocations are done in leafsize units */
668 u64 last_inode_alloc;
670 /* the dirty list is only used by non-reference counted roots */
671 struct list_head dirty_list;
675 * inode items have the data typically returned from stat and store other
676 * info about object characteristics. There is one for every file and dir in
679 #define BTRFS_INODE_ITEM_KEY 1
680 #define BTRFS_INODE_REF_KEY 12
681 #define BTRFS_XATTR_ITEM_KEY 24
682 #define BTRFS_ORPHAN_ITEM_KEY 48
684 #define BTRFS_DIR_LOG_ITEM_KEY 60
685 #define BTRFS_DIR_LOG_INDEX_KEY 72
687 * dir items are the name -> inode pointers in a directory. There is one
688 * for every name in a directory.
690 #define BTRFS_DIR_ITEM_KEY 84
691 #define BTRFS_DIR_INDEX_KEY 96
694 * extent data is for file data
696 #define BTRFS_EXTENT_DATA_KEY 108
699 * csum items have the checksums for data in the extents
701 #define BTRFS_CSUM_ITEM_KEY 120
703 * extent csums are stored in a separate tree and hold csums for
704 * an entire extent on disk.
706 #define BTRFS_EXTENT_CSUM_KEY 128
709 * root items point to tree roots. There are typically in the root
710 * tree used by the super block to find all the other trees
712 #define BTRFS_ROOT_ITEM_KEY 132
715 * root backrefs tie subvols and snapshots to the directory entries that
718 #define BTRFS_ROOT_BACKREF_KEY 144
721 * root refs make a fast index for listing all of the snapshots and
722 * subvolumes referenced by a given root. They point directly to the
723 * directory item in the root that references the subvol
725 #define BTRFS_ROOT_REF_KEY 156
728 * extent items are in the extent map tree. These record which blocks
729 * are used, and how many references there are to each block
731 #define BTRFS_EXTENT_ITEM_KEY 168
732 #define BTRFS_EXTENT_REF_KEY 180
735 * block groups give us hints into the extent allocation trees. Which
736 * blocks are free etc etc
738 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
740 #define BTRFS_DEV_EXTENT_KEY 204
741 #define BTRFS_DEV_ITEM_KEY 216
742 #define BTRFS_CHUNK_ITEM_KEY 228
745 * string items are for debugging. They just store a short string of
748 #define BTRFS_STRING_ITEM_KEY 253
752 #define BTRFS_INODE_NODATASUM (1 << 0)
753 #define BTRFS_INODE_NODATACOW (1 << 1)
754 #define BTRFS_INODE_READONLY (1 << 2)
756 #define read_eb_member(eb, ptr, type, member, result) ( \
757 read_extent_buffer(eb, (char *)(result), \
758 ((unsigned long)(ptr)) + \
759 offsetof(type, member), \
760 sizeof(((type *)0)->member)))
762 #define write_eb_member(eb, ptr, type, member, result) ( \
763 write_extent_buffer(eb, (char *)(result), \
764 ((unsigned long)(ptr)) + \
765 offsetof(type, member), \
766 sizeof(((type *)0)->member)))
768 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
769 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
771 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
772 return le##bits##_to_cpu(h->member); \
774 static inline void btrfs_set_##name(struct extent_buffer *eb, \
777 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
778 h->member = cpu_to_le##bits(val); \
781 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
782 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
785 unsigned long offset = (unsigned long)s; \
786 type *p = (type *) (eb->data + offset); \
787 return le##bits##_to_cpu(p->member); \
789 static inline void btrfs_set_##name(struct extent_buffer *eb, \
790 type *s, u##bits val) \
792 unsigned long offset = (unsigned long)s; \
793 type *p = (type *) (eb->data + offset); \
794 p->member = cpu_to_le##bits(val); \
797 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
798 static inline u##bits btrfs_##name(type *s) \
800 return le##bits##_to_cpu(s->member); \
802 static inline void btrfs_set_##name(type *s, u##bits val) \
804 s->member = cpu_to_le##bits(val); \
807 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
808 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
809 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
810 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
811 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
812 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
813 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
814 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
815 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
816 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
817 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
819 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
820 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
822 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
824 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
826 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
828 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
830 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
831 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
833 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
835 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
837 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
840 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
842 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
845 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
847 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
850 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
851 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
852 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
853 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
854 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
855 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
856 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
857 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
858 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
859 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
860 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
862 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
864 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
867 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
868 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
869 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
871 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
873 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
875 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
877 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
878 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
880 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
882 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
883 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
885 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
888 unsigned long offset = (unsigned long)c;
889 offset += offsetof(struct btrfs_chunk, stripe);
890 offset += nr * sizeof(struct btrfs_stripe);
891 return (struct btrfs_stripe *)offset;
894 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
896 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
899 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
900 struct btrfs_chunk *c, int nr)
902 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
905 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
906 struct btrfs_chunk *c, int nr,
909 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
912 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
913 struct btrfs_chunk *c, int nr)
915 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
918 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
919 struct btrfs_chunk *c, int nr,
922 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
925 /* struct btrfs_block_group_item */
926 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
928 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
930 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
931 struct btrfs_block_group_item, chunk_objectid, 64);
933 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
934 struct btrfs_block_group_item, chunk_objectid, 64);
935 BTRFS_SETGET_FUNCS(disk_block_group_flags,
936 struct btrfs_block_group_item, flags, 64);
937 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
938 struct btrfs_block_group_item, flags, 64);
940 /* struct btrfs_inode_ref */
941 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
942 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
944 /* struct btrfs_inode_item */
945 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
946 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
947 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
948 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
949 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
950 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
951 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
952 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
953 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
954 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
955 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
957 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
958 struct btrfs_inode_item, generation, 64);
959 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
960 struct btrfs_inode_item, size, 64);
961 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
962 struct btrfs_inode_item, nbytes, 64);
963 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
964 struct btrfs_inode_item, block_group, 64);
965 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
966 struct btrfs_inode_item, nlink, 32);
967 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
968 struct btrfs_inode_item, uid, 32);
969 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
970 struct btrfs_inode_item, gid, 32);
971 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
972 struct btrfs_inode_item, mode, 32);
973 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
974 struct btrfs_inode_item, rdev, 64);
975 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
976 struct btrfs_inode_item, flags, 64);
978 static inline struct btrfs_timespec *
979 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
981 unsigned long ptr = (unsigned long)inode_item;
982 ptr += offsetof(struct btrfs_inode_item, atime);
983 return (struct btrfs_timespec *)ptr;
986 static inline struct btrfs_timespec *
987 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
989 unsigned long ptr = (unsigned long)inode_item;
990 ptr += offsetof(struct btrfs_inode_item, mtime);
991 return (struct btrfs_timespec *)ptr;
994 static inline struct btrfs_timespec *
995 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
997 unsigned long ptr = (unsigned long)inode_item;
998 ptr += offsetof(struct btrfs_inode_item, ctime);
999 return (struct btrfs_timespec *)ptr;
1002 static inline struct btrfs_timespec *
1003 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1005 unsigned long ptr = (unsigned long)inode_item;
1006 ptr += offsetof(struct btrfs_inode_item, otime);
1007 return (struct btrfs_timespec *)ptr;
1010 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1011 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1012 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1014 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1017 /* struct btrfs_dev_extent */
1018 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1020 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1021 chunk_objectid, 64);
1022 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1024 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1026 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1028 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1029 return (u8 *)((unsigned long)dev + ptr);
1032 /* struct btrfs_extent_ref */
1033 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1034 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1035 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1036 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1038 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1039 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1041 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1043 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1046 /* struct btrfs_extent_item */
1047 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1048 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1051 /* struct btrfs_node */
1052 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1053 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1055 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1058 ptr = offsetof(struct btrfs_node, ptrs) +
1059 sizeof(struct btrfs_key_ptr) * nr;
1060 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1063 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1067 ptr = offsetof(struct btrfs_node, ptrs) +
1068 sizeof(struct btrfs_key_ptr) * nr;
1069 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1072 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1075 ptr = offsetof(struct btrfs_node, ptrs) +
1076 sizeof(struct btrfs_key_ptr) * nr;
1077 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1080 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1084 ptr = offsetof(struct btrfs_node, ptrs) +
1085 sizeof(struct btrfs_key_ptr) * nr;
1086 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1089 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1091 return offsetof(struct btrfs_node, ptrs) +
1092 sizeof(struct btrfs_key_ptr) * nr;
1095 static inline void btrfs_node_key(struct extent_buffer *eb,
1096 struct btrfs_disk_key *disk_key, int nr)
1099 ptr = btrfs_node_key_ptr_offset(nr);
1100 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1101 struct btrfs_key_ptr, key, disk_key);
1104 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1105 struct btrfs_disk_key *disk_key, int nr)
1108 ptr = btrfs_node_key_ptr_offset(nr);
1109 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1110 struct btrfs_key_ptr, key, disk_key);
1113 /* struct btrfs_item */
1114 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1115 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1117 static inline unsigned long btrfs_item_nr_offset(int nr)
1119 return offsetof(struct btrfs_leaf, items) +
1120 sizeof(struct btrfs_item) * nr;
1123 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1126 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1129 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1130 struct btrfs_item *item)
1132 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1135 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1137 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1140 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1142 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1145 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1147 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1150 static inline void btrfs_item_key(struct extent_buffer *eb,
1151 struct btrfs_disk_key *disk_key, int nr)
1153 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1154 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1157 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1158 struct btrfs_disk_key *disk_key, int nr)
1160 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1161 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1165 * struct btrfs_root_ref
1167 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1168 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1169 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1171 /* struct btrfs_dir_item */
1172 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1173 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1174 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1175 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1177 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1178 struct btrfs_dir_item *item,
1179 struct btrfs_disk_key *key)
1181 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1184 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1185 struct btrfs_dir_item *item,
1186 struct btrfs_disk_key *key)
1188 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1191 /* struct btrfs_disk_key */
1192 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1194 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1195 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1197 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1198 struct btrfs_disk_key *disk)
1200 cpu->offset = le64_to_cpu(disk->offset);
1201 cpu->type = disk->type;
1202 cpu->objectid = le64_to_cpu(disk->objectid);
1205 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1206 struct btrfs_key *cpu)
1208 disk->offset = cpu_to_le64(cpu->offset);
1209 disk->type = cpu->type;
1210 disk->objectid = cpu_to_le64(cpu->objectid);
1213 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1214 struct btrfs_key *key, int nr)
1216 struct btrfs_disk_key disk_key;
1217 btrfs_node_key(eb, &disk_key, nr);
1218 btrfs_disk_key_to_cpu(key, &disk_key);
1221 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1222 struct btrfs_key *key, int nr)
1224 struct btrfs_disk_key disk_key;
1225 btrfs_item_key(eb, &disk_key, nr);
1226 btrfs_disk_key_to_cpu(key, &disk_key);
1229 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1230 struct btrfs_dir_item *item,
1231 struct btrfs_key *key)
1233 struct btrfs_disk_key disk_key;
1234 btrfs_dir_item_key(eb, item, &disk_key);
1235 btrfs_disk_key_to_cpu(key, &disk_key);
1239 static inline u8 btrfs_key_type(struct btrfs_key *key)
1244 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1249 /* struct btrfs_header */
1250 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1251 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1253 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1254 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1255 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1256 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1258 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1260 return (btrfs_header_flags(eb) & flag) == flag;
1263 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1265 u64 flags = btrfs_header_flags(eb);
1266 btrfs_set_header_flags(eb, flags | flag);
1267 return (flags & flag) == flag;
1270 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1272 u64 flags = btrfs_header_flags(eb);
1273 btrfs_set_header_flags(eb, flags & ~flag);
1274 return (flags & flag) == flag;
1277 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1279 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1283 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1285 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1289 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1291 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1295 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1297 unsigned long ptr = offsetof(struct btrfs_header, csum);
1301 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1306 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1311 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1316 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1318 return (btrfs_header_level(eb) == 0);
1321 /* struct btrfs_root_item */
1322 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1324 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1325 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1326 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1328 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1330 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1331 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1332 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1333 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1334 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1335 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1336 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1337 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1341 /* struct btrfs_super_block */
1343 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1344 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1345 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1347 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1348 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1349 struct btrfs_super_block, sys_chunk_array_size, 32);
1350 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1351 struct btrfs_super_block, chunk_root_generation, 64);
1352 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1354 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1356 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1357 chunk_root_level, 8);
1358 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1360 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1362 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1364 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1366 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1368 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1370 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1372 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1374 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1375 root_dir_objectid, 64);
1376 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1378 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1380 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1382 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1383 incompat_flags, 64);
1384 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1387 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1389 int t = btrfs_super_csum_type(s);
1390 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1391 return btrfs_csum_sizes[t];
1394 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1396 return offsetof(struct btrfs_leaf, items);
1399 /* struct btrfs_file_extent_item */
1400 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1402 static inline unsigned long btrfs_file_extent_inline_start(struct
1403 btrfs_file_extent_item *e)
1405 unsigned long offset = (unsigned long)e;
1406 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1410 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1412 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1415 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1417 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1419 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1420 disk_num_bytes, 64);
1421 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1423 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1425 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1427 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1429 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1431 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1432 other_encoding, 16);
1434 /* this returns the number of file bytes represented by the inline item.
1435 * If an item is compressed, this is the uncompressed size
1437 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1438 struct btrfs_file_extent_item *e)
1440 return btrfs_file_extent_ram_bytes(eb, e);
1444 * this returns the number of bytes used by the item on disk, minus the
1445 * size of any extent headers. If a file is compressed on disk, this is
1446 * the compressed size
1448 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1449 struct btrfs_item *e)
1451 unsigned long offset;
1452 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1453 return btrfs_item_size(eb, e) - offset;
1456 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1458 return root->leafsize;
1459 return root->nodesize;
1462 /* helper function to cast into the data area of the leaf. */
1463 #define btrfs_item_ptr(leaf, slot, type) \
1464 ((type *)(btrfs_leaf_data(leaf) + \
1465 btrfs_item_offset_nr(leaf, slot)))
1467 #define btrfs_item_ptr_offset(leaf, slot) \
1468 ((unsigned long)(btrfs_leaf_data(leaf) + \
1469 btrfs_item_offset_nr(leaf, slot)))
1472 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1473 struct btrfs_root *root);
1474 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1475 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1476 btrfs_fs_info *info,
1478 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1479 struct btrfs_block_group_cache
1480 *hint, u64 search_start,
1481 int data, int owner);
1482 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1483 struct btrfs_root *root,
1484 u32 blocksize, u64 parent,
1490 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1491 struct btrfs_root *root,
1492 u64 num_bytes, u64 parent,
1493 u64 root_objectid, u64 ref_generation,
1494 u64 owner, u64 empty_size, u64 hint_byte,
1495 u64 search_end, struct btrfs_key *ins, int data);
1496 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1497 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1499 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1500 struct btrfs_root *root, struct extent_buffer *orig_buf,
1501 struct extent_buffer *buf, int start_slot, int nr);
1502 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1503 *root, u64 bytenr, u64 num_bytes, u64 parent,
1504 u64 root_objectid, u64 ref_generation,
1505 u64 owner_objectid, int pin);
1506 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1507 struct btrfs_root *root,
1508 struct extent_io_tree *unpin);
1509 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1510 struct btrfs_root *root,
1511 u64 bytenr, u64 num_bytes, u64 parent,
1512 u64 root_objectid, u64 ref_generation,
1513 u64 owner_objectid);
1514 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1515 struct btrfs_root *root, u64 bytenr,
1516 u64 orig_parent, u64 parent,
1517 u64 root_objectid, u64 ref_generation,
1518 u64 owner_objectid);
1519 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1520 struct btrfs_root *root);
1521 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1522 int btrfs_read_block_groups(struct btrfs_root *root);
1523 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1524 struct btrfs_root *root, u64 bytes_used,
1525 u64 type, u64 chunk_objectid, u64 chunk_offset,
1527 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
1528 struct btrfs_root *root);
1529 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1530 struct btrfs_root *root, u64 bytenr, u64 num,
1531 int alloc, int mark_free);
1533 int btrfs_previous_item(struct btrfs_root *root,
1534 struct btrfs_path *path, u64 min_objectid,
1536 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1537 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1538 struct btrfs_root *root, struct extent_buffer *buf,
1539 struct extent_buffer *parent, int parent_slot,
1540 struct extent_buffer **cow_ret);
1541 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
1542 struct btrfs_root *root,
1543 struct extent_buffer *buf,
1544 struct extent_buffer *parent, int parent_slot,
1545 struct extent_buffer **cow_ret,
1546 u64 search_start, u64 empty_size);
1547 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1548 struct btrfs_root *root,
1549 struct extent_buffer *buf,
1550 struct extent_buffer **cow_ret, u64 new_root_objectid);
1551 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1552 *root, struct btrfs_path *path, u32 data_size);
1553 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1554 struct btrfs_root *root,
1555 struct btrfs_path *path,
1556 u32 new_size, int from_end);
1557 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1558 *root, struct btrfs_key *key, struct btrfs_path *p, int
1560 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1561 struct btrfs_root *root, struct extent_buffer *parent,
1562 int start_slot, int cache_only, u64 *last_ret,
1563 struct btrfs_key *progress);
1564 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1565 struct btrfs_path *btrfs_alloc_path(void);
1566 void btrfs_free_path(struct btrfs_path *p);
1567 void btrfs_init_path(struct btrfs_path *p);
1568 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1569 struct btrfs_path *path, int slot, int nr);
1571 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1572 struct btrfs_root *root,
1573 struct btrfs_path *path)
1575 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1578 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1579 *root, struct btrfs_key *key, void *data, u32 data_size);
1580 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1581 struct btrfs_root *root,
1582 struct btrfs_path *path,
1583 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1585 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1586 struct btrfs_root *root,
1587 struct btrfs_path *path,
1588 struct btrfs_key *key,
1591 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1594 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1595 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1596 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1597 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1599 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1600 struct btrfs_root *root, struct btrfs_path *path,
1601 struct btrfs_key *new_key);
1604 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1605 struct btrfs_key *key);
1606 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1607 *root, struct btrfs_key *key, struct btrfs_root_item
1609 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1610 *root, struct btrfs_key *key, struct btrfs_root_item
1612 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1613 btrfs_root_item *item, struct btrfs_key *key);
1614 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1615 struct btrfs_root *latest_root);
1617 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1618 *root, const char *name, int name_len, u64 dir,
1619 struct btrfs_key *location, u8 type);
1620 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1621 struct btrfs_root *root,
1622 struct btrfs_path *path, u64 dir,
1623 const char *name, int name_len,
1625 struct btrfs_dir_item *
1626 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1627 struct btrfs_root *root,
1628 struct btrfs_path *path, u64 dir,
1629 u64 objectid, const char *name, int name_len,
1631 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1632 struct btrfs_path *path,
1633 const char *name, int name_len);
1634 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1635 struct btrfs_root *root,
1636 struct btrfs_path *path,
1637 struct btrfs_dir_item *di);
1638 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1639 struct btrfs_root *root, const char *name,
1640 u16 name_len, const void *data, u16 data_len,
1642 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1643 struct btrfs_root *root,
1644 struct btrfs_path *path, u64 dir,
1645 const char *name, u16 name_len,
1648 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1649 struct btrfs_root *fs_root,
1650 u64 dirid, u64 *objectid);
1651 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1654 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1655 struct btrfs_root *root,
1656 const char *name, int name_len,
1657 u64 inode_objectid, u64 ref_objectid, u64 index);
1658 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1659 struct btrfs_root *root,
1660 const char *name, int name_len,
1661 u64 inode_objectid, u64 ref_objectid);
1662 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1663 struct btrfs_root *root,
1664 struct btrfs_path *path, u64 objectid);
1665 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1666 *root, u64 objectid, struct btrfs_inode_item
1668 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1669 *root, struct btrfs_path *path,
1670 struct btrfs_key *location, int mod);
1673 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1674 struct btrfs_root *root,
1675 u64 objectid, u64 pos, u64 offset,
1678 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
1679 struct btrfs_root *root, u64 objectid,
1680 u64 offset, char *buffer, size_t size);
1681 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1682 struct btrfs_root *root,
1683 struct btrfs_path *path, u64 objectid,
1684 u64 bytenr, int mod);
1685 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
1686 struct btrfs_root *root,
1687 struct btrfs_inode_item *inode,
1688 u64 objectid, u64 offset,
1689 char *data, size_t len);
1690 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1691 struct btrfs_root *root,
1692 struct btrfs_path *path,
1693 u64 objectid, u64 offset,
1695 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1696 struct btrfs_root *root, struct btrfs_path *path,