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
97 #define BTRFS_CSUM_TYPE_CRC32 0
101 #define BTRFS_CSUM_TYPE_CRC32 0
103 static int btrfs_csum_sizes[] = { 4, 0 };
105 /* four bytes for CRC32 */
106 #define BTRFS_CRC32_SIZE 4
107 #define BTRFS_EMPTY_DIR_SIZE 0
109 #define BTRFS_FT_UNKNOWN 0
110 #define BTRFS_FT_REG_FILE 1
111 #define BTRFS_FT_DIR 2
112 #define BTRFS_FT_CHRDEV 3
113 #define BTRFS_FT_BLKDEV 4
114 #define BTRFS_FT_FIFO 5
115 #define BTRFS_FT_SOCK 6
116 #define BTRFS_FT_SYMLINK 7
117 #define BTRFS_FT_XATTR 8
118 #define BTRFS_FT_MAX 9
121 * the key defines the order in the tree, and so it also defines (optimal)
122 * block layout. objectid corresonds to the inode number. The flags
123 * tells us things about the object, and is a kind of stream selector.
124 * so for a given inode, keys with flags of 1 might refer to the inode
125 * data, flags of 2 may point to file data in the btree and flags == 3
126 * may point to extents.
128 * offset is the starting byte offset for this key in the stream.
130 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
131 * in cpu native order. Otherwise they are identical and their sizes
132 * should be the same (ie both packed)
134 struct btrfs_disk_key {
138 } __attribute__ ((__packed__));
144 } __attribute__ ((__packed__));
146 struct btrfs_mapping_tree {
147 struct cache_tree cache_tree;
150 #define BTRFS_UUID_SIZE 16
151 struct btrfs_dev_item {
152 /* the internal btrfs device id */
155 /* size of the device */
161 /* optimal io alignment for this device */
164 /* optimal io width for this device */
167 /* minimal io size for this device */
170 /* type and info about this device */
173 /* expected generation for this device */
176 /* grouping information for allocation decisions */
179 /* seek speed 0-100 where 100 is fastest */
182 /* bandwidth 0-100 where 100 is fastest */
185 /* btrfs generated uuid for this device */
186 u8 uuid[BTRFS_UUID_SIZE];
188 /* uuid of FS who owns this device */
189 u8 fsid[BTRFS_UUID_SIZE];
190 } __attribute__ ((__packed__));
192 struct btrfs_stripe {
195 u8 dev_uuid[BTRFS_UUID_SIZE];
196 } __attribute__ ((__packed__));
199 /* size of this chunk in bytes */
202 /* objectid of the root referencing this chunk */
208 /* optimal io alignment for this chunk */
211 /* optimal io width for this chunk */
214 /* minimal io size for this chunk */
217 /* 2^16 stripes is quite a lot, a second limit is the size of a single
222 /* sub stripes only matter for raid10 */
224 struct btrfs_stripe stripe;
225 /* additional stripes go here */
226 } __attribute__ ((__packed__));
228 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
230 BUG_ON(num_stripes == 0);
231 return sizeof(struct btrfs_chunk) +
232 sizeof(struct btrfs_stripe) * (num_stripes - 1);
235 #define BTRFS_FSID_SIZE 16
236 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
239 * every tree block (leaf or node) starts with this header.
241 struct btrfs_header {
242 /* these first four must match the super block */
243 u8 csum[BTRFS_CSUM_SIZE];
244 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
245 __le64 bytenr; /* which block this node is supposed to live in */
248 /* allowed to be different from the super from here on down */
249 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
254 } __attribute__ ((__packed__));
256 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
257 sizeof(struct btrfs_header)) / \
258 sizeof(struct btrfs_key_ptr))
259 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
260 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
261 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
262 sizeof(struct btrfs_item) - \
263 sizeof(struct btrfs_file_extent_item))
265 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
266 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
269 * this is a very generous portion of the super block, giving us
270 * room to translate 14 chunks with 3 stripes each.
272 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
273 #define BTRFS_LABEL_SIZE 256
276 * the super block basically lists the main trees of the FS
277 * it currently lacks any block count etc etc
279 struct btrfs_super_block {
280 u8 csum[BTRFS_CSUM_SIZE];
281 /* the first 3 fields must match struct btrfs_header */
282 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
283 __le64 bytenr; /* this block number */
286 /* allowed to be different from the btrfs_header from here own down */
294 __le64 root_dir_objectid;
300 __le32 sys_chunk_array_size;
301 __le64 chunk_root_generation;
303 __le64 compat_ro_flags;
304 __le64 incompat_flags;
309 struct btrfs_dev_item dev_item;
310 char label[BTRFS_LABEL_SIZE];
311 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
312 } __attribute__ ((__packed__));
315 * Compat flags that we support. If any incompat flags are set other than the
316 * ones specified below then we will fail to mount
318 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
319 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
320 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
323 * A leaf is full of items. offset and size tell us where to find
324 * the item in the leaf (relative to the start of the data area)
327 struct btrfs_disk_key key;
330 } __attribute__ ((__packed__));
333 * leaves have an item area and a data area:
334 * [item0, item1....itemN] [free space] [dataN...data1, data0]
336 * The data is separate from the items to get the keys closer together
340 struct btrfs_header header;
341 struct btrfs_item items[];
342 } __attribute__ ((__packed__));
345 * all non-leaf blocks are nodes, they hold only keys and pointers to
348 struct btrfs_key_ptr {
349 struct btrfs_disk_key key;
352 } __attribute__ ((__packed__));
355 struct btrfs_header header;
356 struct btrfs_key_ptr ptrs[];
357 } __attribute__ ((__packed__));
360 * btrfs_paths remember the path taken from the root down to the leaf.
361 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
362 * to any other levels that are present.
364 * The slots array records the index of the item or block pointer
365 * used while walking the tree.
368 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
369 int slots[BTRFS_MAX_LEVEL];
375 * items in the extent btree are used to record the objectid of the
376 * owner of the block and the number of references
378 struct btrfs_extent_item {
380 } __attribute__ ((__packed__));
382 struct btrfs_extent_ref {
387 } __attribute__ ((__packed__));
389 /* dev extents record free space on individual devices. The owner
390 * field points back to the chunk allocation mapping tree that allocated
391 * the extent. The chunk tree uuid field is a way to double check the owner
393 struct btrfs_dev_extent {
395 __le64 chunk_objectid;
398 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
399 } __attribute__ ((__packed__));
401 struct btrfs_inode_ref {
405 } __attribute__ ((__packed__));
407 struct btrfs_timespec {
410 } __attribute__ ((__packed__));
413 BTRFS_COMPRESS_NONE = 0,
414 BTRFS_COMPRESS_ZLIB = 1,
415 BTRFS_COMPRESS_LAST = 2,
416 } btrfs_compression_type;
418 /* we don't understand any encryption methods right now */
420 BTRFS_ENCRYPTION_NONE = 0,
421 BTRFS_ENCRYPTION_LAST = 1,
422 } btrfs_encryption_type;
424 struct btrfs_inode_item {
425 /* nfs style generation number */
427 /* transid that last touched this inode */
439 struct btrfs_timespec atime;
440 struct btrfs_timespec ctime;
441 struct btrfs_timespec mtime;
442 struct btrfs_timespec otime;
443 } __attribute__ ((__packed__));
445 struct btrfs_dir_item {
446 struct btrfs_disk_key location;
451 } __attribute__ ((__packed__));
453 struct btrfs_root_item {
454 struct btrfs_inode_item inode;
460 __le64 last_snapshot;
463 struct btrfs_disk_key drop_progress;
466 } __attribute__ ((__packed__));
469 * this is used for both forward and backward root refs
471 struct btrfs_root_ref {
475 } __attribute__ ((__packed__));
477 #define BTRFS_FILE_EXTENT_INLINE 0
478 #define BTRFS_FILE_EXTENT_REG 1
479 #define BTRFS_FILE_EXTENT_PREALLOC 2
481 struct btrfs_file_extent_item {
483 * transaction id that created this extent
487 * max number of bytes to hold this extent in ram
488 * when we split a compressed extent we can't know how big
489 * each of the resulting pieces will be. So, this is
490 * an upper limit on the size of the extent in ram instead of
496 * 32 bits for the various ways we might encode the data,
497 * including compression and encryption. If any of these
498 * are set to something a given disk format doesn't understand
499 * it is treated like an incompat flag for reading and writing,
504 __le16 other_encoding; /* spare for later use */
506 /* are we inline data or a real extent? */
510 * disk space consumed by the extent, checksum blocks are included
514 __le64 disk_num_bytes;
516 * the logical offset in file blocks (no csums)
517 * this extent record is for. This allows a file extent to point
518 * into the middle of an existing extent on disk, sharing it
519 * between two snapshots (useful if some bytes in the middle of the
520 * extent have changed
524 * the logical number of file blocks (no csums included)
528 } __attribute__ ((__packed__));
530 struct btrfs_csum_item {
532 } __attribute__ ((__packed__));
534 /* tag for the radix tree of block groups in ram */
535 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
536 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
537 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
538 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
539 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
540 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
541 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
543 struct btrfs_block_group_item {
545 __le64 chunk_objectid;
547 } __attribute__ ((__packed__));
549 struct btrfs_space_info {
555 struct list_head list;
558 struct btrfs_block_group_cache {
559 struct cache_extent cache;
560 struct btrfs_key key;
561 struct btrfs_block_group_item item;
562 struct btrfs_space_info *space_info;
569 struct btrfs_extent_ops {
570 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
571 u64 hint_byte, struct btrfs_key *ins);
572 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
577 struct btrfs_fs_devices;
578 struct btrfs_fs_info {
579 u8 fsid[BTRFS_FSID_SIZE];
580 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
581 struct btrfs_root *fs_root;
582 struct btrfs_root *extent_root;
583 struct btrfs_root *tree_root;
584 struct btrfs_root *chunk_root;
585 struct btrfs_root *dev_root;
587 /* the log root tree is a directory of all the other log roots */
588 struct btrfs_root *log_root_tree;
590 struct extent_io_tree extent_cache;
591 struct extent_io_tree free_space_cache;
592 struct extent_io_tree block_group_cache;
593 struct extent_io_tree pinned_extents;
594 struct extent_io_tree pending_del;
595 struct extent_io_tree extent_ins;
597 /* logical->physical extent mapping */
598 struct btrfs_mapping_tree mapping_tree;
601 u64 last_trans_committed;
603 u64 avail_data_alloc_bits;
604 u64 avail_metadata_alloc_bits;
605 u64 avail_system_alloc_bits;
606 u64 data_alloc_profile;
607 u64 metadata_alloc_profile;
608 u64 system_alloc_profile;
611 struct btrfs_trans_handle *running_transaction;
612 struct btrfs_super_block super_copy;
613 struct extent_buffer *sb_buffer;
614 struct mutex fs_mutex;
617 struct btrfs_extent_ops *extent_ops;
618 struct list_head dirty_cowonly_roots;
620 struct btrfs_fs_devices *fs_devices;
621 struct list_head space_info;
627 * in ram representation of the tree. extent_root is used for all allocations
628 * and for the extent tree extent_root root.
631 struct extent_buffer *node;
632 struct extent_buffer *commit_root;
633 struct btrfs_root_item root_item;
634 struct btrfs_key root_key;
635 struct btrfs_fs_info *fs_info;
639 /* data allocations are done in sectorsize units */
642 /* node allocations are done in nodesize units */
645 /* leaf allocations are done in leafsize units */
648 /* leaf allocations are done in leafsize units */
657 u64 last_inode_alloc;
659 /* the dirty list is only used by non-reference counted roots */
660 struct list_head dirty_list;
664 * inode items have the data typically returned from stat and store other
665 * info about object characteristics. There is one for every file and dir in
668 #define BTRFS_INODE_ITEM_KEY 1
669 #define BTRFS_INODE_REF_KEY 12
670 #define BTRFS_XATTR_ITEM_KEY 24
671 #define BTRFS_ORPHAN_ITEM_KEY 48
673 #define BTRFS_DIR_LOG_ITEM_KEY 60
674 #define BTRFS_DIR_LOG_INDEX_KEY 72
676 * dir items are the name -> inode pointers in a directory. There is one
677 * for every name in a directory.
679 #define BTRFS_DIR_ITEM_KEY 84
680 #define BTRFS_DIR_INDEX_KEY 96
683 * extent data is for file data
685 #define BTRFS_EXTENT_DATA_KEY 108
688 * csum items have the checksums for data in the extents
690 #define BTRFS_CSUM_ITEM_KEY 120
693 * root items point to tree roots. There are typically in the root
694 * tree used by the super block to find all the other trees
696 #define BTRFS_ROOT_ITEM_KEY 132
699 * root backrefs tie subvols and snapshots to the directory entries that
702 #define BTRFS_ROOT_BACKREF_KEY 144
705 * root refs make a fast index for listing all of the snapshots and
706 * subvolumes referenced by a given root. They point directly to the
707 * directory item in the root that references the subvol
709 #define BTRFS_ROOT_REF_KEY 156
712 * extent items are in the extent map tree. These record which blocks
713 * are used, and how many references there are to each block
715 #define BTRFS_EXTENT_ITEM_KEY 168
716 #define BTRFS_EXTENT_REF_KEY 180
719 * block groups give us hints into the extent allocation trees. Which
720 * blocks are free etc etc
722 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
724 #define BTRFS_DEV_EXTENT_KEY 204
725 #define BTRFS_DEV_ITEM_KEY 216
726 #define BTRFS_CHUNK_ITEM_KEY 228
729 * string items are for debugging. They just store a short string of
732 #define BTRFS_STRING_ITEM_KEY 253
736 #define BTRFS_INODE_NODATASUM (1 << 0)
737 #define BTRFS_INODE_NODATACOW (1 << 1)
738 #define BTRFS_INODE_READONLY (1 << 2)
740 #define read_eb_member(eb, ptr, type, member, result) ( \
741 read_extent_buffer(eb, (char *)(result), \
742 ((unsigned long)(ptr)) + \
743 offsetof(type, member), \
744 sizeof(((type *)0)->member)))
746 #define write_eb_member(eb, ptr, type, member, result) ( \
747 write_extent_buffer(eb, (char *)(result), \
748 ((unsigned long)(ptr)) + \
749 offsetof(type, member), \
750 sizeof(((type *)0)->member)))
752 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
753 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
755 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
756 return le##bits##_to_cpu(h->member); \
758 static inline void btrfs_set_##name(struct extent_buffer *eb, \
761 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
762 h->member = cpu_to_le##bits(val); \
765 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
766 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
769 unsigned long offset = (unsigned long)s; \
770 type *p = (type *) (eb->data + offset); \
771 return le##bits##_to_cpu(p->member); \
773 static inline void btrfs_set_##name(struct extent_buffer *eb, \
774 type *s, u##bits val) \
776 unsigned long offset = (unsigned long)s; \
777 type *p = (type *) (eb->data + offset); \
778 p->member = cpu_to_le##bits(val); \
781 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
782 static inline u##bits btrfs_##name(type *s) \
784 return le##bits##_to_cpu(s->member); \
786 static inline void btrfs_set_##name(type *s, u##bits val) \
788 s->member = cpu_to_le##bits(val); \
791 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
792 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
793 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
794 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
795 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
796 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
797 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
798 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
799 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
800 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
801 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
803 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
804 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
806 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
808 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
810 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
812 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
814 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
815 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
817 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
819 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
821 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
824 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
826 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
829 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
831 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
834 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
835 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
836 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
837 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
838 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
839 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
840 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
841 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
842 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
843 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
844 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
846 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
848 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
851 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
852 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
853 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
855 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
857 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
859 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
861 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
862 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
864 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
866 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
867 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
869 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
872 unsigned long offset = (unsigned long)c;
873 offset += offsetof(struct btrfs_chunk, stripe);
874 offset += nr * sizeof(struct btrfs_stripe);
875 return (struct btrfs_stripe *)offset;
878 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
880 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
883 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
884 struct btrfs_chunk *c, int nr)
886 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
889 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
890 struct btrfs_chunk *c, int nr,
893 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
896 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
897 struct btrfs_chunk *c, int nr)
899 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
902 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
903 struct btrfs_chunk *c, int nr,
906 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
909 /* struct btrfs_block_group_item */
910 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
912 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
914 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
915 struct btrfs_block_group_item, chunk_objectid, 64);
917 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
918 struct btrfs_block_group_item, chunk_objectid, 64);
919 BTRFS_SETGET_FUNCS(disk_block_group_flags,
920 struct btrfs_block_group_item, flags, 64);
921 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
922 struct btrfs_block_group_item, flags, 64);
924 /* struct btrfs_inode_ref */
925 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
926 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
928 /* struct btrfs_inode_item */
929 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
930 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
931 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
932 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
933 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
934 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
935 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
936 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
937 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
938 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
939 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
941 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
942 struct btrfs_inode_item, generation, 64);
943 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
944 struct btrfs_inode_item, size, 64);
945 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
946 struct btrfs_inode_item, nbytes, 64);
947 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
948 struct btrfs_inode_item, block_group, 64);
949 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
950 struct btrfs_inode_item, nlink, 32);
951 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
952 struct btrfs_inode_item, uid, 32);
953 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
954 struct btrfs_inode_item, gid, 32);
955 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
956 struct btrfs_inode_item, mode, 32);
957 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
958 struct btrfs_inode_item, rdev, 64);
959 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
960 struct btrfs_inode_item, flags, 64);
962 static inline struct btrfs_timespec *
963 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
965 unsigned long ptr = (unsigned long)inode_item;
966 ptr += offsetof(struct btrfs_inode_item, atime);
967 return (struct btrfs_timespec *)ptr;
970 static inline struct btrfs_timespec *
971 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
973 unsigned long ptr = (unsigned long)inode_item;
974 ptr += offsetof(struct btrfs_inode_item, mtime);
975 return (struct btrfs_timespec *)ptr;
978 static inline struct btrfs_timespec *
979 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
981 unsigned long ptr = (unsigned long)inode_item;
982 ptr += offsetof(struct btrfs_inode_item, ctime);
983 return (struct btrfs_timespec *)ptr;
986 static inline struct btrfs_timespec *
987 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
989 unsigned long ptr = (unsigned long)inode_item;
990 ptr += offsetof(struct btrfs_inode_item, otime);
991 return (struct btrfs_timespec *)ptr;
994 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
995 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
996 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
998 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1001 /* struct btrfs_dev_extent */
1002 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1004 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1005 chunk_objectid, 64);
1006 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1008 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1010 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1012 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1013 return (u8 *)((unsigned long)dev + ptr);
1016 /* struct btrfs_extent_ref */
1017 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1018 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1019 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1020 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1022 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1023 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1025 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1027 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1030 /* struct btrfs_extent_item */
1031 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1032 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1035 /* struct btrfs_node */
1036 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1037 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1039 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1042 ptr = offsetof(struct btrfs_node, ptrs) +
1043 sizeof(struct btrfs_key_ptr) * nr;
1044 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1047 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1051 ptr = offsetof(struct btrfs_node, ptrs) +
1052 sizeof(struct btrfs_key_ptr) * nr;
1053 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1056 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1059 ptr = offsetof(struct btrfs_node, ptrs) +
1060 sizeof(struct btrfs_key_ptr) * nr;
1061 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1064 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1068 ptr = offsetof(struct btrfs_node, ptrs) +
1069 sizeof(struct btrfs_key_ptr) * nr;
1070 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1073 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1075 return offsetof(struct btrfs_node, ptrs) +
1076 sizeof(struct btrfs_key_ptr) * nr;
1079 static inline void btrfs_node_key(struct extent_buffer *eb,
1080 struct btrfs_disk_key *disk_key, int nr)
1083 ptr = btrfs_node_key_ptr_offset(nr);
1084 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1085 struct btrfs_key_ptr, key, disk_key);
1088 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1089 struct btrfs_disk_key *disk_key, int nr)
1092 ptr = btrfs_node_key_ptr_offset(nr);
1093 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1094 struct btrfs_key_ptr, key, disk_key);
1097 /* struct btrfs_item */
1098 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1099 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1101 static inline unsigned long btrfs_item_nr_offset(int nr)
1103 return offsetof(struct btrfs_leaf, items) +
1104 sizeof(struct btrfs_item) * nr;
1107 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1110 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1113 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1114 struct btrfs_item *item)
1116 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1119 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1121 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1124 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1126 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1129 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1131 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1134 static inline void btrfs_item_key(struct extent_buffer *eb,
1135 struct btrfs_disk_key *disk_key, int nr)
1137 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1138 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1141 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1142 struct btrfs_disk_key *disk_key, int nr)
1144 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1145 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1149 * struct btrfs_root_ref
1151 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1152 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1153 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1155 /* struct btrfs_dir_item */
1156 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1157 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1158 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1159 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1161 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1162 struct btrfs_dir_item *item,
1163 struct btrfs_disk_key *key)
1165 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1168 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1169 struct btrfs_dir_item *item,
1170 struct btrfs_disk_key *key)
1172 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1175 /* struct btrfs_disk_key */
1176 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1178 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1179 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1181 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1182 struct btrfs_disk_key *disk)
1184 cpu->offset = le64_to_cpu(disk->offset);
1185 cpu->type = disk->type;
1186 cpu->objectid = le64_to_cpu(disk->objectid);
1189 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1190 struct btrfs_key *cpu)
1192 disk->offset = cpu_to_le64(cpu->offset);
1193 disk->type = cpu->type;
1194 disk->objectid = cpu_to_le64(cpu->objectid);
1197 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1198 struct btrfs_key *key, int nr)
1200 struct btrfs_disk_key disk_key;
1201 btrfs_node_key(eb, &disk_key, nr);
1202 btrfs_disk_key_to_cpu(key, &disk_key);
1205 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1206 struct btrfs_key *key, int nr)
1208 struct btrfs_disk_key disk_key;
1209 btrfs_item_key(eb, &disk_key, nr);
1210 btrfs_disk_key_to_cpu(key, &disk_key);
1213 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1214 struct btrfs_dir_item *item,
1215 struct btrfs_key *key)
1217 struct btrfs_disk_key disk_key;
1218 btrfs_dir_item_key(eb, item, &disk_key);
1219 btrfs_disk_key_to_cpu(key, &disk_key);
1223 static inline u8 btrfs_key_type(struct btrfs_key *key)
1228 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1233 /* struct btrfs_header */
1234 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1235 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1237 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1238 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1239 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1240 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1242 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1244 return (btrfs_header_flags(eb) & flag) == flag;
1247 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1249 u64 flags = btrfs_header_flags(eb);
1250 btrfs_set_header_flags(eb, flags | flag);
1251 return (flags & flag) == flag;
1254 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1256 u64 flags = btrfs_header_flags(eb);
1257 btrfs_set_header_flags(eb, flags & ~flag);
1258 return (flags & flag) == flag;
1261 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1263 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1267 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1269 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1273 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1275 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1279 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1281 unsigned long ptr = offsetof(struct btrfs_header, csum);
1285 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1290 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1295 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1300 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1302 return (btrfs_header_level(eb) == 0);
1305 /* struct btrfs_root_item */
1306 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1308 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1309 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1310 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1312 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1314 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1315 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1316 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1317 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1318 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1319 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1320 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1321 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1325 /* struct btrfs_super_block */
1327 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1328 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1329 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1331 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1332 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1333 struct btrfs_super_block, sys_chunk_array_size, 32);
1334 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1335 struct btrfs_super_block, chunk_root_generation, 64);
1336 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1338 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1340 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1341 chunk_root_level, 8);
1342 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1344 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1346 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1348 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1350 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1352 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1354 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1356 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1358 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1359 root_dir_objectid, 64);
1360 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1362 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1364 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1366 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1367 incompat_flags, 64);
1368 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1371 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1373 int t = btrfs_super_csum_type(s);
1374 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1375 return btrfs_csum_sizes[t];
1378 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1380 return offsetof(struct btrfs_leaf, items);
1383 /* struct btrfs_file_extent_item */
1384 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1386 static inline unsigned long btrfs_file_extent_inline_start(struct
1387 btrfs_file_extent_item *e)
1389 unsigned long offset = (unsigned long)e;
1390 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1394 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1396 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1399 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1401 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1403 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1404 disk_num_bytes, 64);
1405 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1407 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1409 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1411 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1413 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1415 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1416 other_encoding, 16);
1418 /* this returns the number of file bytes represented by the inline item.
1419 * If an item is compressed, this is the uncompressed size
1421 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1422 struct btrfs_file_extent_item *e)
1424 return btrfs_file_extent_ram_bytes(eb, e);
1428 * this returns the number of bytes used by the item on disk, minus the
1429 * size of any extent headers. If a file is compressed on disk, this is
1430 * the compressed size
1432 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1433 struct btrfs_item *e)
1435 unsigned long offset;
1436 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1437 return btrfs_item_size(eb, e) - offset;
1440 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1442 return root->leafsize;
1443 return root->nodesize;
1446 /* helper function to cast into the data area of the leaf. */
1447 #define btrfs_item_ptr(leaf, slot, type) \
1448 ((type *)(btrfs_leaf_data(leaf) + \
1449 btrfs_item_offset_nr(leaf, slot)))
1451 #define btrfs_item_ptr_offset(leaf, slot) \
1452 ((unsigned long)(btrfs_leaf_data(leaf) + \
1453 btrfs_item_offset_nr(leaf, slot)))
1456 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1457 struct btrfs_root *root);
1458 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1459 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1460 btrfs_fs_info *info,
1462 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1463 struct btrfs_block_group_cache
1464 *hint, u64 search_start,
1465 int data, int owner);
1466 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1467 struct btrfs_root *root,
1468 u32 blocksize, u64 parent,
1474 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1475 struct btrfs_root *root,
1476 u64 num_bytes, u64 parent,
1477 u64 root_objectid, u64 ref_generation,
1478 u64 owner, u64 empty_size, u64 hint_byte,
1479 u64 search_end, struct btrfs_key *ins, int data);
1480 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1481 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1483 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1484 struct btrfs_root *root, struct extent_buffer *orig_buf,
1485 struct extent_buffer *buf, int start_slot, int nr);
1486 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1487 *root, u64 bytenr, u64 num_bytes, u64 parent,
1488 u64 root_objectid, u64 ref_generation,
1489 u64 owner_objectid, int pin);
1490 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1491 struct btrfs_root *root,
1492 struct extent_io_tree *unpin);
1493 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1494 struct btrfs_root *root,
1495 u64 bytenr, u64 num_bytes, u64 parent,
1496 u64 root_objectid, u64 ref_generation,
1497 u64 owner_objectid);
1498 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1499 struct btrfs_root *root, u64 bytenr,
1500 u64 orig_parent, u64 parent,
1501 u64 root_objectid, u64 ref_generation,
1502 u64 owner_objectid);
1503 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1504 struct btrfs_root *root);
1505 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1506 int btrfs_read_block_groups(struct btrfs_root *root);
1507 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1508 struct btrfs_root *root, u64 bytes_used,
1509 u64 type, u64 chunk_objectid, u64 chunk_offset,
1511 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
1512 struct btrfs_root *root);
1513 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1514 struct btrfs_root *root, u64 bytenr, u64 num,
1515 int alloc, int mark_free);
1517 int btrfs_previous_item(struct btrfs_root *root,
1518 struct btrfs_path *path, u64 min_objectid,
1520 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1521 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1522 struct btrfs_root *root, struct extent_buffer *buf,
1523 struct extent_buffer *parent, int parent_slot,
1524 struct extent_buffer **cow_ret);
1525 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
1526 struct btrfs_root *root,
1527 struct extent_buffer *buf,
1528 struct extent_buffer *parent, int parent_slot,
1529 struct extent_buffer **cow_ret,
1530 u64 search_start, u64 empty_size);
1531 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1532 struct btrfs_root *root,
1533 struct extent_buffer *buf,
1534 struct extent_buffer **cow_ret, u64 new_root_objectid);
1535 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1536 *root, struct btrfs_path *path, u32 data_size);
1537 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1538 struct btrfs_root *root,
1539 struct btrfs_path *path,
1540 u32 new_size, int from_end);
1541 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1542 *root, struct btrfs_key *key, struct btrfs_path *p, int
1544 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1545 struct btrfs_root *root, struct extent_buffer *parent,
1546 int start_slot, int cache_only, u64 *last_ret,
1547 struct btrfs_key *progress);
1548 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1549 struct btrfs_path *btrfs_alloc_path(void);
1550 void btrfs_free_path(struct btrfs_path *p);
1551 void btrfs_init_path(struct btrfs_path *p);
1552 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1553 struct btrfs_path *path, int slot, int nr);
1555 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1556 struct btrfs_root *root,
1557 struct btrfs_path *path)
1559 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1562 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1563 *root, struct btrfs_key *key, void *data, u32 data_size);
1564 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1565 struct btrfs_root *root,
1566 struct btrfs_path *path,
1567 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1569 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1570 struct btrfs_root *root,
1571 struct btrfs_path *path,
1572 struct btrfs_key *key,
1575 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1578 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1579 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1580 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1581 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1583 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1584 struct btrfs_root *root, struct btrfs_path *path,
1585 struct btrfs_key *new_key);
1588 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1589 struct btrfs_key *key);
1590 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1591 *root, struct btrfs_key *key, struct btrfs_root_item
1593 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1594 *root, struct btrfs_key *key, struct btrfs_root_item
1596 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1597 btrfs_root_item *item, struct btrfs_key *key);
1598 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1599 struct btrfs_root *latest_root);
1601 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1602 *root, const char *name, int name_len, u64 dir,
1603 struct btrfs_key *location, u8 type);
1604 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1605 struct btrfs_root *root,
1606 struct btrfs_path *path, u64 dir,
1607 const char *name, int name_len,
1609 struct btrfs_dir_item *
1610 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1611 struct btrfs_root *root,
1612 struct btrfs_path *path, u64 dir,
1613 u64 objectid, const char *name, int name_len,
1615 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1616 struct btrfs_path *path,
1617 const char *name, int name_len);
1618 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1619 struct btrfs_root *root,
1620 struct btrfs_path *path,
1621 struct btrfs_dir_item *di);
1622 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1623 struct btrfs_root *root, const char *name,
1624 u16 name_len, const void *data, u16 data_len,
1626 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1627 struct btrfs_root *root,
1628 struct btrfs_path *path, u64 dir,
1629 const char *name, u16 name_len,
1632 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1633 struct btrfs_root *fs_root,
1634 u64 dirid, u64 *objectid);
1635 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1638 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1639 struct btrfs_root *root,
1640 const char *name, int name_len,
1641 u64 inode_objectid, u64 ref_objectid, u64 index);
1642 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1643 struct btrfs_root *root,
1644 const char *name, int name_len,
1645 u64 inode_objectid, u64 ref_objectid);
1646 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1647 struct btrfs_root *root,
1648 struct btrfs_path *path, u64 objectid);
1649 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1650 *root, u64 objectid, struct btrfs_inode_item
1652 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1653 *root, struct btrfs_path *path,
1654 struct btrfs_key *location, int mod);
1657 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1658 struct btrfs_root *root,
1659 u64 objectid, u64 pos, u64 offset,
1662 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
1663 struct btrfs_root *root, u64 objectid,
1664 u64 offset, char *buffer, size_t size);
1665 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1666 struct btrfs_root *root,
1667 struct btrfs_path *path, u64 objectid,
1668 u64 bytenr, int mod);
1669 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
1670 struct btrfs_root *root,
1671 struct btrfs_inode_item *inode,
1672 u64 objectid, u64 offset,
1673 char *data, size_t len);
1674 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1675 struct btrfs_root *root,
1676 struct btrfs_path *path,
1677 u64 objectid, u64 offset,
1679 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1680 struct btrfs_root *root, struct btrfs_path *path,