ARM: 7409/1: Do not call flush_cache_user_range with mmap_sem held
[linux/fpc-iii.git] / fs / btrfs / ctree.h
blob66179bcb16f6dc1711c793ca757e458523d52812
1 /*
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.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
22 #include <linux/mm.h>
23 #include <linux/highmem.h>
24 #include <linux/fs.h>
25 #include <linux/rwsem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include "extent_io.h"
34 #include "extent_map.h"
35 #include "async-thread.h"
36 #include "ioctl.h"
38 struct btrfs_trans_handle;
39 struct btrfs_transaction;
40 struct btrfs_pending_snapshot;
41 extern struct kmem_cache *btrfs_trans_handle_cachep;
42 extern struct kmem_cache *btrfs_transaction_cachep;
43 extern struct kmem_cache *btrfs_bit_radix_cachep;
44 extern struct kmem_cache *btrfs_path_cachep;
45 extern struct kmem_cache *btrfs_free_space_cachep;
46 struct btrfs_ordered_sum;
48 #define BTRFS_MAGIC "_BHRfS_M"
50 #define BTRFS_MAX_LEVEL 8
52 #define BTRFS_COMPAT_EXTENT_TREE_V0
55 * files bigger than this get some pre-flushing when they are added
56 * to the ordered operations list. That way we limit the total
57 * work done by the commit
59 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
61 /* holds pointers to all of the tree roots */
62 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
64 /* stores information about which extents are in use, and reference counts */
65 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
68 * chunk tree stores translations from logical -> physical block numbering
69 * the super block points to the chunk tree
71 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
74 * stores information about which areas of a given device are in use.
75 * one per device. The tree of tree roots points to the device tree
77 #define BTRFS_DEV_TREE_OBJECTID 4ULL
79 /* one per subvolume, storing files and directories */
80 #define BTRFS_FS_TREE_OBJECTID 5ULL
82 /* directory objectid inside the root tree */
83 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
85 /* holds checksums of all the data extents */
86 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
88 /* orhpan objectid for tracking unlinked/truncated files */
89 #define BTRFS_ORPHAN_OBJECTID -5ULL
91 /* does write ahead logging to speed up fsyncs */
92 #define BTRFS_TREE_LOG_OBJECTID -6ULL
93 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
95 /* for space balancing */
96 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
97 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
100 * extent checksums all have this objectid
101 * this allows them to share the logging tree
102 * for fsyncs
104 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
106 /* For storing free space cache */
107 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
110 * The inode number assigned to the special inode for sotring
111 * free ino cache
113 #define BTRFS_FREE_INO_OBJECTID -12ULL
115 /* dummy objectid represents multiple objectids */
116 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
119 * All files have objectids in this range.
121 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
122 #define BTRFS_LAST_FREE_OBJECTID -256ULL
123 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
127 * the device items go into the chunk tree. The key is in the form
128 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
130 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
132 #define BTRFS_BTREE_INODE_OBJECTID 1
134 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
137 * we can actually store much bigger names, but lets not confuse the rest
138 * of linux
140 #define BTRFS_NAME_LEN 255
142 /* 32 bytes in various csum fields */
143 #define BTRFS_CSUM_SIZE 32
145 /* csum types */
146 #define BTRFS_CSUM_TYPE_CRC32 0
148 static int btrfs_csum_sizes[] = { 4, 0 };
150 /* four bytes for CRC32 */
151 #define BTRFS_EMPTY_DIR_SIZE 0
153 #define BTRFS_FT_UNKNOWN 0
154 #define BTRFS_FT_REG_FILE 1
155 #define BTRFS_FT_DIR 2
156 #define BTRFS_FT_CHRDEV 3
157 #define BTRFS_FT_BLKDEV 4
158 #define BTRFS_FT_FIFO 5
159 #define BTRFS_FT_SOCK 6
160 #define BTRFS_FT_SYMLINK 7
161 #define BTRFS_FT_XATTR 8
162 #define BTRFS_FT_MAX 9
165 * The key defines the order in the tree, and so it also defines (optimal)
166 * block layout.
168 * objectid corresponds to the inode number.
170 * type tells us things about the object, and is a kind of stream selector.
171 * so for a given inode, keys with type of 1 might refer to the inode data,
172 * type of 2 may point to file data in the btree and type == 3 may point to
173 * extents.
175 * offset is the starting byte offset for this key in the stream.
177 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
178 * in cpu native order. Otherwise they are identical and their sizes
179 * should be the same (ie both packed)
181 struct btrfs_disk_key {
182 __le64 objectid;
183 u8 type;
184 __le64 offset;
185 } __attribute__ ((__packed__));
187 struct btrfs_key {
188 u64 objectid;
189 u8 type;
190 u64 offset;
191 } __attribute__ ((__packed__));
193 struct btrfs_mapping_tree {
194 struct extent_map_tree map_tree;
197 struct btrfs_dev_item {
198 /* the internal btrfs device id */
199 __le64 devid;
201 /* size of the device */
202 __le64 total_bytes;
204 /* bytes used */
205 __le64 bytes_used;
207 /* optimal io alignment for this device */
208 __le32 io_align;
210 /* optimal io width for this device */
211 __le32 io_width;
213 /* minimal io size for this device */
214 __le32 sector_size;
216 /* type and info about this device */
217 __le64 type;
219 /* expected generation for this device */
220 __le64 generation;
223 * starting byte of this partition on the device,
224 * to allow for stripe alignment in the future
226 __le64 start_offset;
228 /* grouping information for allocation decisions */
229 __le32 dev_group;
231 /* seek speed 0-100 where 100 is fastest */
232 u8 seek_speed;
234 /* bandwidth 0-100 where 100 is fastest */
235 u8 bandwidth;
237 /* btrfs generated uuid for this device */
238 u8 uuid[BTRFS_UUID_SIZE];
240 /* uuid of FS who owns this device */
241 u8 fsid[BTRFS_UUID_SIZE];
242 } __attribute__ ((__packed__));
244 struct btrfs_stripe {
245 __le64 devid;
246 __le64 offset;
247 u8 dev_uuid[BTRFS_UUID_SIZE];
248 } __attribute__ ((__packed__));
250 struct btrfs_chunk {
251 /* size of this chunk in bytes */
252 __le64 length;
254 /* objectid of the root referencing this chunk */
255 __le64 owner;
257 __le64 stripe_len;
258 __le64 type;
260 /* optimal io alignment for this chunk */
261 __le32 io_align;
263 /* optimal io width for this chunk */
264 __le32 io_width;
266 /* minimal io size for this chunk */
267 __le32 sector_size;
269 /* 2^16 stripes is quite a lot, a second limit is the size of a single
270 * item in the btree
272 __le16 num_stripes;
274 /* sub stripes only matter for raid10 */
275 __le16 sub_stripes;
276 struct btrfs_stripe stripe;
277 /* additional stripes go here */
278 } __attribute__ ((__packed__));
280 #define BTRFS_FREE_SPACE_EXTENT 1
281 #define BTRFS_FREE_SPACE_BITMAP 2
283 struct btrfs_free_space_entry {
284 __le64 offset;
285 __le64 bytes;
286 u8 type;
287 } __attribute__ ((__packed__));
289 struct btrfs_free_space_header {
290 struct btrfs_disk_key location;
291 __le64 generation;
292 __le64 num_entries;
293 __le64 num_bitmaps;
294 } __attribute__ ((__packed__));
296 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
298 BUG_ON(num_stripes == 0);
299 return sizeof(struct btrfs_chunk) +
300 sizeof(struct btrfs_stripe) * (num_stripes - 1);
303 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
304 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
307 * File system states
310 /* Errors detected */
311 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
313 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
314 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
316 #define BTRFS_BACKREF_REV_MAX 256
317 #define BTRFS_BACKREF_REV_SHIFT 56
318 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
319 BTRFS_BACKREF_REV_SHIFT)
321 #define BTRFS_OLD_BACKREF_REV 0
322 #define BTRFS_MIXED_BACKREF_REV 1
325 * every tree block (leaf or node) starts with this header.
327 struct btrfs_header {
328 /* these first four must match the super block */
329 u8 csum[BTRFS_CSUM_SIZE];
330 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
331 __le64 bytenr; /* which block this node is supposed to live in */
332 __le64 flags;
334 /* allowed to be different from the super from here on down */
335 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
336 __le64 generation;
337 __le64 owner;
338 __le32 nritems;
339 u8 level;
340 } __attribute__ ((__packed__));
342 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
343 sizeof(struct btrfs_header)) / \
344 sizeof(struct btrfs_key_ptr))
345 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
346 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
347 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
348 sizeof(struct btrfs_item) - \
349 sizeof(struct btrfs_file_extent_item))
350 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
351 sizeof(struct btrfs_item) -\
352 sizeof(struct btrfs_dir_item))
356 * this is a very generous portion of the super block, giving us
357 * room to translate 14 chunks with 3 stripes each.
359 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
360 #define BTRFS_LABEL_SIZE 256
363 * the super block basically lists the main trees of the FS
364 * it currently lacks any block count etc etc
366 struct btrfs_super_block {
367 u8 csum[BTRFS_CSUM_SIZE];
368 /* the first 4 fields must match struct btrfs_header */
369 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
370 __le64 bytenr; /* this block number */
371 __le64 flags;
373 /* allowed to be different from the btrfs_header from here own down */
374 __le64 magic;
375 __le64 generation;
376 __le64 root;
377 __le64 chunk_root;
378 __le64 log_root;
380 /* this will help find the new super based on the log root */
381 __le64 log_root_transid;
382 __le64 total_bytes;
383 __le64 bytes_used;
384 __le64 root_dir_objectid;
385 __le64 num_devices;
386 __le32 sectorsize;
387 __le32 nodesize;
388 __le32 leafsize;
389 __le32 stripesize;
390 __le32 sys_chunk_array_size;
391 __le64 chunk_root_generation;
392 __le64 compat_flags;
393 __le64 compat_ro_flags;
394 __le64 incompat_flags;
395 __le16 csum_type;
396 u8 root_level;
397 u8 chunk_root_level;
398 u8 log_root_level;
399 struct btrfs_dev_item dev_item;
401 char label[BTRFS_LABEL_SIZE];
403 __le64 cache_generation;
405 /* future expansion */
406 __le64 reserved[31];
407 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
408 } __attribute__ ((__packed__));
411 * Compat flags that we support. If any incompat flags are set other than the
412 * ones specified below then we will fail to mount
414 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
415 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
416 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
417 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
419 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
420 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
421 #define BTRFS_FEATURE_INCOMPAT_SUPP \
422 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
423 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
424 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
425 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
428 * A leaf is full of items. offset and size tell us where to find
429 * the item in the leaf (relative to the start of the data area)
431 struct btrfs_item {
432 struct btrfs_disk_key key;
433 __le32 offset;
434 __le32 size;
435 } __attribute__ ((__packed__));
438 * leaves have an item area and a data area:
439 * [item0, item1....itemN] [free space] [dataN...data1, data0]
441 * The data is separate from the items to get the keys closer together
442 * during searches.
444 struct btrfs_leaf {
445 struct btrfs_header header;
446 struct btrfs_item items[];
447 } __attribute__ ((__packed__));
450 * all non-leaf blocks are nodes, they hold only keys and pointers to
451 * other blocks
453 struct btrfs_key_ptr {
454 struct btrfs_disk_key key;
455 __le64 blockptr;
456 __le64 generation;
457 } __attribute__ ((__packed__));
459 struct btrfs_node {
460 struct btrfs_header header;
461 struct btrfs_key_ptr ptrs[];
462 } __attribute__ ((__packed__));
465 * btrfs_paths remember the path taken from the root down to the leaf.
466 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
467 * to any other levels that are present.
469 * The slots array records the index of the item or block pointer
470 * used while walking the tree.
472 struct btrfs_path {
473 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
474 int slots[BTRFS_MAX_LEVEL];
475 /* if there is real range locking, this locks field will change */
476 int locks[BTRFS_MAX_LEVEL];
477 int reada;
478 /* keep some upper locks as we walk down */
479 int lowest_level;
482 * set by btrfs_split_item, tells search_slot to keep all locks
483 * and to force calls to keep space in the nodes
485 unsigned int search_for_split:1;
486 unsigned int keep_locks:1;
487 unsigned int skip_locking:1;
488 unsigned int leave_spinning:1;
489 unsigned int search_commit_root:1;
493 * items in the extent btree are used to record the objectid of the
494 * owner of the block and the number of references
497 struct btrfs_extent_item {
498 __le64 refs;
499 __le64 generation;
500 __le64 flags;
501 } __attribute__ ((__packed__));
503 struct btrfs_extent_item_v0 {
504 __le32 refs;
505 } __attribute__ ((__packed__));
507 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
508 sizeof(struct btrfs_item))
510 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
511 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
513 /* following flags only apply to tree blocks */
515 /* use full backrefs for extent pointers in the block */
516 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
519 * this flag is only used internally by scrub and may be changed at any time
520 * it is only declared here to avoid collisions
522 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
524 struct btrfs_tree_block_info {
525 struct btrfs_disk_key key;
526 u8 level;
527 } __attribute__ ((__packed__));
529 struct btrfs_extent_data_ref {
530 __le64 root;
531 __le64 objectid;
532 __le64 offset;
533 __le32 count;
534 } __attribute__ ((__packed__));
536 struct btrfs_shared_data_ref {
537 __le32 count;
538 } __attribute__ ((__packed__));
540 struct btrfs_extent_inline_ref {
541 u8 type;
542 __le64 offset;
543 } __attribute__ ((__packed__));
545 /* old style backrefs item */
546 struct btrfs_extent_ref_v0 {
547 __le64 root;
548 __le64 generation;
549 __le64 objectid;
550 __le32 count;
551 } __attribute__ ((__packed__));
554 /* dev extents record free space on individual devices. The owner
555 * field points back to the chunk allocation mapping tree that allocated
556 * the extent. The chunk tree uuid field is a way to double check the owner
558 struct btrfs_dev_extent {
559 __le64 chunk_tree;
560 __le64 chunk_objectid;
561 __le64 chunk_offset;
562 __le64 length;
563 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
564 } __attribute__ ((__packed__));
566 struct btrfs_inode_ref {
567 __le64 index;
568 __le16 name_len;
569 /* name goes here */
570 } __attribute__ ((__packed__));
572 struct btrfs_timespec {
573 __le64 sec;
574 __le32 nsec;
575 } __attribute__ ((__packed__));
577 enum btrfs_compression_type {
578 BTRFS_COMPRESS_NONE = 0,
579 BTRFS_COMPRESS_ZLIB = 1,
580 BTRFS_COMPRESS_LZO = 2,
581 BTRFS_COMPRESS_TYPES = 2,
582 BTRFS_COMPRESS_LAST = 3,
585 struct btrfs_inode_item {
586 /* nfs style generation number */
587 __le64 generation;
588 /* transid that last touched this inode */
589 __le64 transid;
590 __le64 size;
591 __le64 nbytes;
592 __le64 block_group;
593 __le32 nlink;
594 __le32 uid;
595 __le32 gid;
596 __le32 mode;
597 __le64 rdev;
598 __le64 flags;
600 /* modification sequence number for NFS */
601 __le64 sequence;
604 * a little future expansion, for more than this we can
605 * just grow the inode item and version it
607 __le64 reserved[4];
608 struct btrfs_timespec atime;
609 struct btrfs_timespec ctime;
610 struct btrfs_timespec mtime;
611 struct btrfs_timespec otime;
612 } __attribute__ ((__packed__));
614 struct btrfs_dir_log_item {
615 __le64 end;
616 } __attribute__ ((__packed__));
618 struct btrfs_dir_item {
619 struct btrfs_disk_key location;
620 __le64 transid;
621 __le16 data_len;
622 __le16 name_len;
623 u8 type;
624 } __attribute__ ((__packed__));
626 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
628 struct btrfs_root_item {
629 struct btrfs_inode_item inode;
630 __le64 generation;
631 __le64 root_dirid;
632 __le64 bytenr;
633 __le64 byte_limit;
634 __le64 bytes_used;
635 __le64 last_snapshot;
636 __le64 flags;
637 __le32 refs;
638 struct btrfs_disk_key drop_progress;
639 u8 drop_level;
640 u8 level;
641 } __attribute__ ((__packed__));
644 * this is used for both forward and backward root refs
646 struct btrfs_root_ref {
647 __le64 dirid;
648 __le64 sequence;
649 __le16 name_len;
650 } __attribute__ ((__packed__));
652 #define BTRFS_FILE_EXTENT_INLINE 0
653 #define BTRFS_FILE_EXTENT_REG 1
654 #define BTRFS_FILE_EXTENT_PREALLOC 2
656 struct btrfs_file_extent_item {
658 * transaction id that created this extent
660 __le64 generation;
662 * max number of bytes to hold this extent in ram
663 * when we split a compressed extent we can't know how big
664 * each of the resulting pieces will be. So, this is
665 * an upper limit on the size of the extent in ram instead of
666 * an exact limit.
668 __le64 ram_bytes;
671 * 32 bits for the various ways we might encode the data,
672 * including compression and encryption. If any of these
673 * are set to something a given disk format doesn't understand
674 * it is treated like an incompat flag for reading and writing,
675 * but not for stat.
677 u8 compression;
678 u8 encryption;
679 __le16 other_encoding; /* spare for later use */
681 /* are we inline data or a real extent? */
682 u8 type;
685 * disk space consumed by the extent, checksum blocks are included
686 * in these numbers
688 __le64 disk_bytenr;
689 __le64 disk_num_bytes;
691 * the logical offset in file blocks (no csums)
692 * this extent record is for. This allows a file extent to point
693 * into the middle of an existing extent on disk, sharing it
694 * between two snapshots (useful if some bytes in the middle of the
695 * extent have changed
697 __le64 offset;
699 * the logical number of file blocks (no csums included). This
700 * always reflects the size uncompressed and without encoding.
702 __le64 num_bytes;
704 } __attribute__ ((__packed__));
706 struct btrfs_csum_item {
707 u8 csum;
708 } __attribute__ ((__packed__));
710 /* different types of block groups (and chunks) */
711 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
712 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
713 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
714 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
715 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
716 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
717 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
718 #define BTRFS_NR_RAID_TYPES 5
720 struct btrfs_block_group_item {
721 __le64 used;
722 __le64 chunk_objectid;
723 __le64 flags;
724 } __attribute__ ((__packed__));
726 struct btrfs_space_info {
727 u64 flags;
729 u64 total_bytes; /* total bytes in the space,
730 this doesn't take mirrors into account */
731 u64 bytes_used; /* total bytes used,
732 this doesn't take mirrors into account */
733 u64 bytes_pinned; /* total bytes pinned, will be freed when the
734 transaction finishes */
735 u64 bytes_reserved; /* total bytes the allocator has reserved for
736 current allocations */
737 u64 bytes_readonly; /* total bytes that are read only */
739 u64 bytes_may_use; /* number of bytes that may be used for
740 delalloc/allocations */
741 u64 disk_used; /* total bytes used on disk */
742 u64 disk_total; /* total bytes on disk, takes mirrors into
743 account */
746 * we bump reservation progress every time we decrement
747 * bytes_reserved. This way people waiting for reservations
748 * know something good has happened and they can check
749 * for progress. The number here isn't to be trusted, it
750 * just shows reclaim activity
752 unsigned long reservation_progress;
754 unsigned int full:1; /* indicates that we cannot allocate any more
755 chunks for this space */
756 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
758 unsigned int force_alloc; /* set if we need to force a chunk
759 alloc for this space */
761 struct list_head list;
763 /* for block groups in our same type */
764 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
765 spinlock_t lock;
766 struct rw_semaphore groups_sem;
767 atomic_t caching_threads;
770 struct btrfs_block_rsv {
771 u64 size;
772 u64 reserved;
773 u64 freed[2];
774 struct btrfs_space_info *space_info;
775 struct list_head list;
776 spinlock_t lock;
777 atomic_t usage;
778 unsigned int priority:8;
779 unsigned int durable:1;
780 unsigned int refill_used:1;
781 unsigned int full:1;
785 * free clusters are used to claim free space in relatively large chunks,
786 * allowing us to do less seeky writes. They are used for all metadata
787 * allocations and data allocations in ssd mode.
789 struct btrfs_free_cluster {
790 spinlock_t lock;
791 spinlock_t refill_lock;
792 struct rb_root root;
794 /* largest extent in this cluster */
795 u64 max_size;
797 /* first extent starting offset */
798 u64 window_start;
800 struct btrfs_block_group_cache *block_group;
802 * when a cluster is allocated from a block group, we put the
803 * cluster onto a list in the block group so that it can
804 * be freed before the block group is freed.
806 struct list_head block_group_list;
809 enum btrfs_caching_type {
810 BTRFS_CACHE_NO = 0,
811 BTRFS_CACHE_STARTED = 1,
812 BTRFS_CACHE_FINISHED = 2,
815 enum btrfs_disk_cache_state {
816 BTRFS_DC_WRITTEN = 0,
817 BTRFS_DC_ERROR = 1,
818 BTRFS_DC_CLEAR = 2,
819 BTRFS_DC_SETUP = 3,
820 BTRFS_DC_NEED_WRITE = 4,
823 struct btrfs_caching_control {
824 struct list_head list;
825 struct mutex mutex;
826 wait_queue_head_t wait;
827 struct btrfs_block_group_cache *block_group;
828 u64 progress;
829 atomic_t count;
832 struct btrfs_block_group_cache {
833 struct btrfs_key key;
834 struct btrfs_block_group_item item;
835 struct btrfs_fs_info *fs_info;
836 struct inode *inode;
837 spinlock_t lock;
838 u64 pinned;
839 u64 reserved;
840 u64 reserved_pinned;
841 u64 bytes_super;
842 u64 flags;
843 u64 sectorsize;
844 unsigned int ro:1;
845 unsigned int dirty:1;
846 unsigned int iref:1;
848 int disk_cache_state;
850 /* cache tracking stuff */
851 int cached;
852 struct btrfs_caching_control *caching_ctl;
853 u64 last_byte_to_unpin;
855 struct btrfs_space_info *space_info;
857 /* free space cache stuff */
858 struct btrfs_free_space_ctl *free_space_ctl;
860 /* block group cache stuff */
861 struct rb_node cache_node;
863 /* for block groups in the same raid type */
864 struct list_head list;
866 /* usage count */
867 atomic_t count;
869 /* List of struct btrfs_free_clusters for this block group.
870 * Today it will only have one thing on it, but that may change
872 struct list_head cluster_list;
875 struct reloc_control;
876 struct btrfs_device;
877 struct btrfs_fs_devices;
878 struct btrfs_delayed_root;
879 struct btrfs_fs_info {
880 u8 fsid[BTRFS_FSID_SIZE];
881 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
882 struct btrfs_root *extent_root;
883 struct btrfs_root *tree_root;
884 struct btrfs_root *chunk_root;
885 struct btrfs_root *dev_root;
886 struct btrfs_root *fs_root;
887 struct btrfs_root *csum_root;
889 /* the log root tree is a directory of all the other log roots */
890 struct btrfs_root *log_root_tree;
892 spinlock_t fs_roots_radix_lock;
893 struct radix_tree_root fs_roots_radix;
895 /* block group cache stuff */
896 spinlock_t block_group_cache_lock;
897 struct rb_root block_group_cache_tree;
899 struct extent_io_tree freed_extents[2];
900 struct extent_io_tree *pinned_extents;
902 /* logical->physical extent mapping */
903 struct btrfs_mapping_tree mapping_tree;
906 * block reservation for extent, checksum, root tree and
907 * delayed dir index item
909 struct btrfs_block_rsv global_block_rsv;
910 /* block reservation for delay allocation */
911 struct btrfs_block_rsv delalloc_block_rsv;
912 /* block reservation for metadata operations */
913 struct btrfs_block_rsv trans_block_rsv;
914 /* block reservation for chunk tree */
915 struct btrfs_block_rsv chunk_block_rsv;
917 struct btrfs_block_rsv empty_block_rsv;
919 /* list of block reservations that cross multiple transactions */
920 struct list_head durable_block_rsv_list;
922 struct mutex durable_block_rsv_mutex;
924 u64 generation;
925 u64 last_trans_committed;
928 * this is updated to the current trans every time a full commit
929 * is required instead of the faster short fsync log commits
931 u64 last_trans_log_full_commit;
932 unsigned long mount_opt:20;
933 unsigned long compress_type:4;
934 u64 max_inline;
935 u64 alloc_start;
936 struct btrfs_transaction *running_transaction;
937 wait_queue_head_t transaction_throttle;
938 wait_queue_head_t transaction_wait;
939 wait_queue_head_t transaction_blocked_wait;
940 wait_queue_head_t async_submit_wait;
942 struct btrfs_super_block super_copy;
943 struct btrfs_super_block super_for_commit;
944 struct block_device *__bdev;
945 struct super_block *sb;
946 struct inode *btree_inode;
947 struct backing_dev_info bdi;
948 struct mutex tree_log_mutex;
949 struct mutex transaction_kthread_mutex;
950 struct mutex cleaner_mutex;
951 struct mutex chunk_mutex;
952 struct mutex volume_mutex;
954 * this protects the ordered operations list only while we are
955 * processing all of the entries on it. This way we make
956 * sure the commit code doesn't find the list temporarily empty
957 * because another function happens to be doing non-waiting preflush
958 * before jumping into the main commit.
960 struct mutex ordered_operations_mutex;
961 struct rw_semaphore extent_commit_sem;
963 struct rw_semaphore cleanup_work_sem;
965 struct rw_semaphore subvol_sem;
966 struct srcu_struct subvol_srcu;
968 spinlock_t trans_lock;
970 * the reloc mutex goes with the trans lock, it is taken
971 * during commit to protect us from the relocation code
973 struct mutex reloc_mutex;
975 struct list_head trans_list;
976 struct list_head hashers;
977 struct list_head dead_roots;
978 struct list_head caching_block_groups;
980 spinlock_t delayed_iput_lock;
981 struct list_head delayed_iputs;
983 atomic_t nr_async_submits;
984 atomic_t async_submit_draining;
985 atomic_t nr_async_bios;
986 atomic_t async_delalloc_pages;
987 atomic_t open_ioctl_trans;
990 * this is used by the balancing code to wait for all the pending
991 * ordered extents
993 spinlock_t ordered_extent_lock;
996 * all of the data=ordered extents pending writeback
997 * these can span multiple transactions and basically include
998 * every dirty data page that isn't from nodatacow
1000 struct list_head ordered_extents;
1003 * all of the inodes that have delalloc bytes. It is possible for
1004 * this list to be empty even when there is still dirty data=ordered
1005 * extents waiting to finish IO.
1007 struct list_head delalloc_inodes;
1010 * special rename and truncate targets that must be on disk before
1011 * we're allowed to commit. This is basically the ext3 style
1012 * data=ordered list.
1014 struct list_head ordered_operations;
1017 * there is a pool of worker threads for checksumming during writes
1018 * and a pool for checksumming after reads. This is because readers
1019 * can run with FS locks held, and the writers may be waiting for
1020 * those locks. We don't want ordering in the pending list to cause
1021 * deadlocks, and so the two are serviced separately.
1023 * A third pool does submit_bio to avoid deadlocking with the other
1024 * two
1026 struct btrfs_workers generic_worker;
1027 struct btrfs_workers workers;
1028 struct btrfs_workers delalloc_workers;
1029 struct btrfs_workers endio_workers;
1030 struct btrfs_workers endio_meta_workers;
1031 struct btrfs_workers endio_meta_write_workers;
1032 struct btrfs_workers endio_write_workers;
1033 struct btrfs_workers endio_freespace_worker;
1034 struct btrfs_workers submit_workers;
1036 * fixup workers take dirty pages that didn't properly go through
1037 * the cow mechanism and make them safe to write. It happens
1038 * for the sys_munmap function call path
1040 struct btrfs_workers fixup_workers;
1041 struct btrfs_workers delayed_workers;
1042 struct task_struct *transaction_kthread;
1043 struct task_struct *cleaner_kthread;
1044 int thread_pool_size;
1046 struct kobject super_kobj;
1047 struct completion kobj_unregister;
1048 int do_barriers;
1049 int closing;
1050 int log_root_recovering;
1051 int enospc_unlink;
1052 int trans_no_join;
1054 u64 total_pinned;
1056 /* protected by the delalloc lock, used to keep from writing
1057 * metadata until there is a nice batch
1059 u64 dirty_metadata_bytes;
1060 struct list_head dirty_cowonly_roots;
1062 struct btrfs_fs_devices *fs_devices;
1065 * the space_info list is almost entirely read only. It only changes
1066 * when we add a new raid type to the FS, and that happens
1067 * very rarely. RCU is used to protect it.
1069 struct list_head space_info;
1071 struct reloc_control *reloc_ctl;
1073 spinlock_t delalloc_lock;
1074 u64 delalloc_bytes;
1076 /* data_alloc_cluster is only used in ssd mode */
1077 struct btrfs_free_cluster data_alloc_cluster;
1079 /* all metadata allocations go through this cluster */
1080 struct btrfs_free_cluster meta_alloc_cluster;
1082 /* auto defrag inodes go here */
1083 spinlock_t defrag_inodes_lock;
1084 struct rb_root defrag_inodes;
1085 atomic_t defrag_running;
1087 spinlock_t ref_cache_lock;
1088 u64 total_ref_cache_size;
1090 u64 avail_data_alloc_bits;
1091 u64 avail_metadata_alloc_bits;
1092 u64 avail_system_alloc_bits;
1093 u64 data_alloc_profile;
1094 u64 metadata_alloc_profile;
1095 u64 system_alloc_profile;
1097 unsigned data_chunk_allocations;
1098 unsigned metadata_ratio;
1100 void *bdev_holder;
1102 /* private scrub information */
1103 struct mutex scrub_lock;
1104 atomic_t scrubs_running;
1105 atomic_t scrub_pause_req;
1106 atomic_t scrubs_paused;
1107 atomic_t scrub_cancel_req;
1108 wait_queue_head_t scrub_pause_wait;
1109 struct rw_semaphore scrub_super_lock;
1110 int scrub_workers_refcnt;
1111 struct btrfs_workers scrub_workers;
1113 /* filesystem state */
1114 u64 fs_state;
1116 struct btrfs_delayed_root *delayed_root;
1120 * in ram representation of the tree. extent_root is used for all allocations
1121 * and for the extent tree extent_root root.
1123 struct btrfs_root {
1124 struct extent_buffer *node;
1126 struct extent_buffer *commit_root;
1127 struct btrfs_root *log_root;
1128 struct btrfs_root *reloc_root;
1130 struct btrfs_root_item root_item;
1131 struct btrfs_key root_key;
1132 struct btrfs_fs_info *fs_info;
1133 struct extent_io_tree dirty_log_pages;
1135 struct kobject root_kobj;
1136 struct completion kobj_unregister;
1137 struct mutex objectid_mutex;
1139 spinlock_t accounting_lock;
1140 struct btrfs_block_rsv *block_rsv;
1142 /* free ino cache stuff */
1143 struct mutex fs_commit_mutex;
1144 struct btrfs_free_space_ctl *free_ino_ctl;
1145 enum btrfs_caching_type cached;
1146 spinlock_t cache_lock;
1147 wait_queue_head_t cache_wait;
1148 struct btrfs_free_space_ctl *free_ino_pinned;
1149 u64 cache_progress;
1150 struct inode *cache_inode;
1152 struct mutex log_mutex;
1153 wait_queue_head_t log_writer_wait;
1154 wait_queue_head_t log_commit_wait[2];
1155 atomic_t log_writers;
1156 atomic_t log_commit[2];
1157 unsigned long log_transid;
1158 unsigned long last_log_commit;
1159 unsigned long log_batch;
1160 pid_t log_start_pid;
1161 bool log_multiple_pids;
1163 u64 objectid;
1164 u64 last_trans;
1166 /* data allocations are done in sectorsize units */
1167 u32 sectorsize;
1169 /* node allocations are done in nodesize units */
1170 u32 nodesize;
1172 /* leaf allocations are done in leafsize units */
1173 u32 leafsize;
1175 u32 stripesize;
1177 u32 type;
1179 u64 highest_objectid;
1181 /* btrfs_record_root_in_trans is a multi-step process,
1182 * and it can race with the balancing code. But the
1183 * race is very small, and only the first time the root
1184 * is added to each transaction. So in_trans_setup
1185 * is used to tell us when more checks are required
1187 unsigned long in_trans_setup;
1188 int ref_cows;
1189 int track_dirty;
1190 int in_radix;
1192 u64 defrag_trans_start;
1193 struct btrfs_key defrag_progress;
1194 struct btrfs_key defrag_max;
1195 int defrag_running;
1196 char *name;
1198 /* the dirty list is only used by non-reference counted roots */
1199 struct list_head dirty_list;
1201 struct list_head root_list;
1203 spinlock_t orphan_lock;
1204 struct list_head orphan_list;
1205 struct btrfs_block_rsv *orphan_block_rsv;
1206 int orphan_item_inserted;
1207 int orphan_cleanup_state;
1209 spinlock_t inode_lock;
1210 /* red-black tree that keeps track of in-memory inodes */
1211 struct rb_root inode_tree;
1214 * radix tree that keeps track of delayed nodes of every inode,
1215 * protected by inode_lock
1217 struct radix_tree_root delayed_nodes_tree;
1219 * right now this just gets used so that a root has its own devid
1220 * for stat. It may be used for more later
1222 struct super_block anon_super;
1225 struct btrfs_ioctl_defrag_range_args {
1226 /* start of the defrag operation */
1227 __u64 start;
1229 /* number of bytes to defrag, use (u64)-1 to say all */
1230 __u64 len;
1233 * flags for the operation, which can include turning
1234 * on compression for this one defrag
1236 __u64 flags;
1239 * any extent bigger than this will be considered
1240 * already defragged. Use 0 to take the kernel default
1241 * Use 1 to say every single extent must be rewritten
1243 __u32 extent_thresh;
1246 * which compression method to use if turning on compression
1247 * for this defrag operation. If unspecified, zlib will
1248 * be used
1250 __u32 compress_type;
1252 /* spare for later */
1253 __u32 unused[4];
1258 * inode items have the data typically returned from stat and store other
1259 * info about object characteristics. There is one for every file and dir in
1260 * the FS
1262 #define BTRFS_INODE_ITEM_KEY 1
1263 #define BTRFS_INODE_REF_KEY 12
1264 #define BTRFS_XATTR_ITEM_KEY 24
1265 #define BTRFS_ORPHAN_ITEM_KEY 48
1266 /* reserve 2-15 close to the inode for later flexibility */
1269 * dir items are the name -> inode pointers in a directory. There is one
1270 * for every name in a directory.
1272 #define BTRFS_DIR_LOG_ITEM_KEY 60
1273 #define BTRFS_DIR_LOG_INDEX_KEY 72
1274 #define BTRFS_DIR_ITEM_KEY 84
1275 #define BTRFS_DIR_INDEX_KEY 96
1277 * extent data is for file data
1279 #define BTRFS_EXTENT_DATA_KEY 108
1282 * extent csums are stored in a separate tree and hold csums for
1283 * an entire extent on disk.
1285 #define BTRFS_EXTENT_CSUM_KEY 128
1288 * root items point to tree roots. They are typically in the root
1289 * tree used by the super block to find all the other trees
1291 #define BTRFS_ROOT_ITEM_KEY 132
1294 * root backrefs tie subvols and snapshots to the directory entries that
1295 * reference them
1297 #define BTRFS_ROOT_BACKREF_KEY 144
1300 * root refs make a fast index for listing all of the snapshots and
1301 * subvolumes referenced by a given root. They point directly to the
1302 * directory item in the root that references the subvol
1304 #define BTRFS_ROOT_REF_KEY 156
1307 * extent items are in the extent map tree. These record which blocks
1308 * are used, and how many references there are to each block
1310 #define BTRFS_EXTENT_ITEM_KEY 168
1312 #define BTRFS_TREE_BLOCK_REF_KEY 176
1314 #define BTRFS_EXTENT_DATA_REF_KEY 178
1316 #define BTRFS_EXTENT_REF_V0_KEY 180
1318 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1320 #define BTRFS_SHARED_DATA_REF_KEY 184
1323 * block groups give us hints into the extent allocation trees. Which
1324 * blocks are free etc etc
1326 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1328 #define BTRFS_DEV_EXTENT_KEY 204
1329 #define BTRFS_DEV_ITEM_KEY 216
1330 #define BTRFS_CHUNK_ITEM_KEY 228
1333 * string items are for debugging. They just store a short string of
1334 * data in the FS
1336 #define BTRFS_STRING_ITEM_KEY 253
1339 * Flags for mount options.
1341 * Note: don't forget to add new options to btrfs_show_options()
1343 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1344 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1345 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1346 #define BTRFS_MOUNT_SSD (1 << 3)
1347 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1348 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1349 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1350 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1351 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1352 #define BTRFS_MOUNT_NOSSD (1 << 9)
1353 #define BTRFS_MOUNT_DISCARD (1 << 10)
1354 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1355 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1356 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1357 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1358 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1359 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1360 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1362 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1363 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1364 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1365 BTRFS_MOUNT_##opt)
1367 * Inode flags
1369 #define BTRFS_INODE_NODATASUM (1 << 0)
1370 #define BTRFS_INODE_NODATACOW (1 << 1)
1371 #define BTRFS_INODE_READONLY (1 << 2)
1372 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1373 #define BTRFS_INODE_PREALLOC (1 << 4)
1374 #define BTRFS_INODE_SYNC (1 << 5)
1375 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1376 #define BTRFS_INODE_APPEND (1 << 7)
1377 #define BTRFS_INODE_NODUMP (1 << 8)
1378 #define BTRFS_INODE_NOATIME (1 << 9)
1379 #define BTRFS_INODE_DIRSYNC (1 << 10)
1380 #define BTRFS_INODE_COMPRESS (1 << 11)
1382 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1384 /* some macros to generate set/get funcs for the struct fields. This
1385 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1386 * one for u8:
1388 #define le8_to_cpu(v) (v)
1389 #define cpu_to_le8(v) (v)
1390 #define __le8 u8
1392 #define read_eb_member(eb, ptr, type, member, result) ( \
1393 read_extent_buffer(eb, (char *)(result), \
1394 ((unsigned long)(ptr)) + \
1395 offsetof(type, member), \
1396 sizeof(((type *)0)->member)))
1398 #define write_eb_member(eb, ptr, type, member, result) ( \
1399 write_extent_buffer(eb, (char *)(result), \
1400 ((unsigned long)(ptr)) + \
1401 offsetof(type, member), \
1402 sizeof(((type *)0)->member)))
1404 #ifndef BTRFS_SETGET_FUNCS
1405 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1406 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1407 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1408 #endif
1410 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1411 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1413 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1414 u##bits res = le##bits##_to_cpu(p->member); \
1415 kunmap_atomic(p, KM_USER0); \
1416 return res; \
1418 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1419 u##bits val) \
1421 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1422 p->member = cpu_to_le##bits(val); \
1423 kunmap_atomic(p, KM_USER0); \
1426 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1427 static inline u##bits btrfs_##name(type *s) \
1429 return le##bits##_to_cpu(s->member); \
1431 static inline void btrfs_set_##name(type *s, u##bits val) \
1433 s->member = cpu_to_le##bits(val); \
1436 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1437 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1438 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1439 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1440 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1441 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1442 start_offset, 64);
1443 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1444 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1445 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1446 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1447 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1448 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1450 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1451 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1452 total_bytes, 64);
1453 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1454 bytes_used, 64);
1455 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1456 io_align, 32);
1457 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1458 io_width, 32);
1459 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1460 sector_size, 32);
1461 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1462 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1463 dev_group, 32);
1464 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1465 seek_speed, 8);
1466 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1467 bandwidth, 8);
1468 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1469 generation, 64);
1471 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1473 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1476 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1478 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1481 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1482 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1483 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1484 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1485 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1486 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1487 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1488 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1489 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1490 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1491 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1493 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1495 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1498 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1499 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1500 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1501 stripe_len, 64);
1502 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1503 io_align, 32);
1504 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1505 io_width, 32);
1506 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1507 sector_size, 32);
1508 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1509 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1510 num_stripes, 16);
1511 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1512 sub_stripes, 16);
1513 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1514 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1516 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1517 int nr)
1519 unsigned long offset = (unsigned long)c;
1520 offset += offsetof(struct btrfs_chunk, stripe);
1521 offset += nr * sizeof(struct btrfs_stripe);
1522 return (struct btrfs_stripe *)offset;
1525 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1527 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1530 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1531 struct btrfs_chunk *c, int nr)
1533 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1536 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1537 struct btrfs_chunk *c, int nr)
1539 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1542 /* struct btrfs_block_group_item */
1543 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1544 used, 64);
1545 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1546 used, 64);
1547 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1548 struct btrfs_block_group_item, chunk_objectid, 64);
1550 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1551 struct btrfs_block_group_item, chunk_objectid, 64);
1552 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1553 struct btrfs_block_group_item, flags, 64);
1554 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1555 struct btrfs_block_group_item, flags, 64);
1557 /* struct btrfs_inode_ref */
1558 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1559 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1561 /* struct btrfs_inode_item */
1562 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1563 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1564 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1565 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1566 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1567 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1568 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1569 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1570 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1571 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1572 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1573 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1575 static inline struct btrfs_timespec *
1576 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1578 unsigned long ptr = (unsigned long)inode_item;
1579 ptr += offsetof(struct btrfs_inode_item, atime);
1580 return (struct btrfs_timespec *)ptr;
1583 static inline struct btrfs_timespec *
1584 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1586 unsigned long ptr = (unsigned long)inode_item;
1587 ptr += offsetof(struct btrfs_inode_item, mtime);
1588 return (struct btrfs_timespec *)ptr;
1591 static inline struct btrfs_timespec *
1592 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1594 unsigned long ptr = (unsigned long)inode_item;
1595 ptr += offsetof(struct btrfs_inode_item, ctime);
1596 return (struct btrfs_timespec *)ptr;
1599 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1600 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1602 /* struct btrfs_dev_extent */
1603 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1604 chunk_tree, 64);
1605 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1606 chunk_objectid, 64);
1607 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1608 chunk_offset, 64);
1609 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1611 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1613 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1614 return (u8 *)((unsigned long)dev + ptr);
1617 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1618 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1619 generation, 64);
1620 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1622 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1625 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1627 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1628 struct btrfs_tree_block_info *item,
1629 struct btrfs_disk_key *key)
1631 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1634 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1635 struct btrfs_tree_block_info *item,
1636 struct btrfs_disk_key *key)
1638 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1641 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1642 root, 64);
1643 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1644 objectid, 64);
1645 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1646 offset, 64);
1647 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1648 count, 32);
1650 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1651 count, 32);
1653 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1654 type, 8);
1655 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1656 offset, 64);
1658 static inline u32 btrfs_extent_inline_ref_size(int type)
1660 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1661 type == BTRFS_SHARED_BLOCK_REF_KEY)
1662 return sizeof(struct btrfs_extent_inline_ref);
1663 if (type == BTRFS_SHARED_DATA_REF_KEY)
1664 return sizeof(struct btrfs_shared_data_ref) +
1665 sizeof(struct btrfs_extent_inline_ref);
1666 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1667 return sizeof(struct btrfs_extent_data_ref) +
1668 offsetof(struct btrfs_extent_inline_ref, offset);
1669 BUG();
1670 return 0;
1673 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1674 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1675 generation, 64);
1676 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1677 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1679 /* struct btrfs_node */
1680 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1681 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1683 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1685 unsigned long ptr;
1686 ptr = offsetof(struct btrfs_node, ptrs) +
1687 sizeof(struct btrfs_key_ptr) * nr;
1688 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1691 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1692 int nr, u64 val)
1694 unsigned long ptr;
1695 ptr = offsetof(struct btrfs_node, ptrs) +
1696 sizeof(struct btrfs_key_ptr) * nr;
1697 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1700 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1702 unsigned long ptr;
1703 ptr = offsetof(struct btrfs_node, ptrs) +
1704 sizeof(struct btrfs_key_ptr) * nr;
1705 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1708 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1709 int nr, u64 val)
1711 unsigned long ptr;
1712 ptr = offsetof(struct btrfs_node, ptrs) +
1713 sizeof(struct btrfs_key_ptr) * nr;
1714 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1717 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1719 return offsetof(struct btrfs_node, ptrs) +
1720 sizeof(struct btrfs_key_ptr) * nr;
1723 void btrfs_node_key(struct extent_buffer *eb,
1724 struct btrfs_disk_key *disk_key, int nr);
1726 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1727 struct btrfs_disk_key *disk_key, int nr)
1729 unsigned long ptr;
1730 ptr = btrfs_node_key_ptr_offset(nr);
1731 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1732 struct btrfs_key_ptr, key, disk_key);
1735 /* struct btrfs_item */
1736 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1737 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1739 static inline unsigned long btrfs_item_nr_offset(int nr)
1741 return offsetof(struct btrfs_leaf, items) +
1742 sizeof(struct btrfs_item) * nr;
1745 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1746 int nr)
1748 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1751 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1752 struct btrfs_item *item)
1754 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1757 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1759 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1762 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1764 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1767 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1769 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1772 static inline void btrfs_item_key(struct extent_buffer *eb,
1773 struct btrfs_disk_key *disk_key, int nr)
1775 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1776 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1779 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1780 struct btrfs_disk_key *disk_key, int nr)
1782 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1783 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1786 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1789 * struct btrfs_root_ref
1791 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1792 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1793 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1795 /* struct btrfs_dir_item */
1796 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1797 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1798 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1799 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1801 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1802 struct btrfs_dir_item *item,
1803 struct btrfs_disk_key *key)
1805 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1808 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1809 struct btrfs_dir_item *item,
1810 struct btrfs_disk_key *key)
1812 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1815 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1816 num_entries, 64);
1817 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1818 num_bitmaps, 64);
1819 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1820 generation, 64);
1822 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1823 struct btrfs_free_space_header *h,
1824 struct btrfs_disk_key *key)
1826 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1829 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1830 struct btrfs_free_space_header *h,
1831 struct btrfs_disk_key *key)
1833 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1836 /* struct btrfs_disk_key */
1837 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1838 objectid, 64);
1839 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1840 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1842 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1843 struct btrfs_disk_key *disk)
1845 cpu->offset = le64_to_cpu(disk->offset);
1846 cpu->type = disk->type;
1847 cpu->objectid = le64_to_cpu(disk->objectid);
1850 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1851 struct btrfs_key *cpu)
1853 disk->offset = cpu_to_le64(cpu->offset);
1854 disk->type = cpu->type;
1855 disk->objectid = cpu_to_le64(cpu->objectid);
1858 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1859 struct btrfs_key *key, int nr)
1861 struct btrfs_disk_key disk_key;
1862 btrfs_node_key(eb, &disk_key, nr);
1863 btrfs_disk_key_to_cpu(key, &disk_key);
1866 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1867 struct btrfs_key *key, int nr)
1869 struct btrfs_disk_key disk_key;
1870 btrfs_item_key(eb, &disk_key, nr);
1871 btrfs_disk_key_to_cpu(key, &disk_key);
1874 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1875 struct btrfs_dir_item *item,
1876 struct btrfs_key *key)
1878 struct btrfs_disk_key disk_key;
1879 btrfs_dir_item_key(eb, item, &disk_key);
1880 btrfs_disk_key_to_cpu(key, &disk_key);
1884 static inline u8 btrfs_key_type(struct btrfs_key *key)
1886 return key->type;
1889 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1891 key->type = val;
1894 /* struct btrfs_header */
1895 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1896 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1897 generation, 64);
1898 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1899 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1900 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1901 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1903 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1905 return (btrfs_header_flags(eb) & flag) == flag;
1908 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1910 u64 flags = btrfs_header_flags(eb);
1911 btrfs_set_header_flags(eb, flags | flag);
1912 return (flags & flag) == flag;
1915 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1917 u64 flags = btrfs_header_flags(eb);
1918 btrfs_set_header_flags(eb, flags & ~flag);
1919 return (flags & flag) == flag;
1922 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1924 u64 flags = btrfs_header_flags(eb);
1925 return flags >> BTRFS_BACKREF_REV_SHIFT;
1928 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1929 int rev)
1931 u64 flags = btrfs_header_flags(eb);
1932 flags &= ~BTRFS_BACKREF_REV_MASK;
1933 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1934 btrfs_set_header_flags(eb, flags);
1937 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1939 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1940 return (u8 *)ptr;
1943 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1945 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1946 return (u8 *)ptr;
1949 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1951 return btrfs_header_level(eb) == 0;
1954 /* struct btrfs_root_item */
1955 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1956 generation, 64);
1957 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1958 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1959 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1961 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1962 generation, 64);
1963 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1964 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1965 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1966 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1967 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1968 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1969 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1970 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1971 last_snapshot, 64);
1973 static inline bool btrfs_root_readonly(struct btrfs_root *root)
1975 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
1978 /* struct btrfs_super_block */
1980 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1981 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1982 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1983 generation, 64);
1984 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1985 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1986 struct btrfs_super_block, sys_chunk_array_size, 32);
1987 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1988 struct btrfs_super_block, chunk_root_generation, 64);
1989 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1990 root_level, 8);
1991 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1992 chunk_root, 64);
1993 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1994 chunk_root_level, 8);
1995 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1996 log_root, 64);
1997 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1998 log_root_transid, 64);
1999 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2000 log_root_level, 8);
2001 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2002 total_bytes, 64);
2003 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2004 bytes_used, 64);
2005 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2006 sectorsize, 32);
2007 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2008 nodesize, 32);
2009 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2010 leafsize, 32);
2011 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2012 stripesize, 32);
2013 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2014 root_dir_objectid, 64);
2015 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2016 num_devices, 64);
2017 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2018 compat_flags, 64);
2019 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2020 compat_ro_flags, 64);
2021 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2022 incompat_flags, 64);
2023 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2024 csum_type, 16);
2025 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2026 cache_generation, 64);
2028 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2030 int t = btrfs_super_csum_type(s);
2031 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2032 return btrfs_csum_sizes[t];
2035 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2037 return offsetof(struct btrfs_leaf, items);
2040 /* struct btrfs_file_extent_item */
2041 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2043 static inline unsigned long
2044 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2046 unsigned long offset = (unsigned long)e;
2047 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2048 return offset;
2051 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2053 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2056 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2057 disk_bytenr, 64);
2058 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2059 generation, 64);
2060 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2061 disk_num_bytes, 64);
2062 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2063 offset, 64);
2064 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2065 num_bytes, 64);
2066 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2067 ram_bytes, 64);
2068 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2069 compression, 8);
2070 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2071 encryption, 8);
2072 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2073 other_encoding, 16);
2075 /* this returns the number of file bytes represented by the inline item.
2076 * If an item is compressed, this is the uncompressed size
2078 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2079 struct btrfs_file_extent_item *e)
2081 return btrfs_file_extent_ram_bytes(eb, e);
2085 * this returns the number of bytes used by the item on disk, minus the
2086 * size of any extent headers. If a file is compressed on disk, this is
2087 * the compressed size
2089 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2090 struct btrfs_item *e)
2092 unsigned long offset;
2093 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2094 return btrfs_item_size(eb, e) - offset;
2097 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
2099 return sb->s_fs_info;
2102 static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
2104 if (level == 0)
2105 return root->leafsize;
2106 return root->nodesize;
2109 /* helper function to cast into the data area of the leaf. */
2110 #define btrfs_item_ptr(leaf, slot, type) \
2111 ((type *)(btrfs_leaf_data(leaf) + \
2112 btrfs_item_offset_nr(leaf, slot)))
2114 #define btrfs_item_ptr_offset(leaf, slot) \
2115 ((unsigned long)(btrfs_leaf_data(leaf) + \
2116 btrfs_item_offset_nr(leaf, slot)))
2118 static inline struct dentry *fdentry(struct file *file)
2120 return file->f_path.dentry;
2123 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2125 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2126 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2129 /* extent-tree.c */
2130 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2131 int num_items)
2133 return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2134 3 * num_items;
2137 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2138 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2139 struct btrfs_root *root, unsigned long count);
2140 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2141 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2142 struct btrfs_root *root, u64 bytenr,
2143 u64 num_bytes, u64 *refs, u64 *flags);
2144 int btrfs_pin_extent(struct btrfs_root *root,
2145 u64 bytenr, u64 num, int reserved);
2146 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2147 struct btrfs_root *root,
2148 u64 objectid, u64 offset, u64 bytenr);
2149 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2150 struct btrfs_fs_info *info,
2151 u64 bytenr);
2152 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2153 u64 btrfs_find_block_group(struct btrfs_root *root,
2154 u64 search_start, u64 search_hint, int owner);
2155 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2156 struct btrfs_root *root, u32 blocksize,
2157 u64 parent, u64 root_objectid,
2158 struct btrfs_disk_key *key, int level,
2159 u64 hint, u64 empty_size);
2160 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2161 struct btrfs_root *root,
2162 struct extent_buffer *buf,
2163 u64 parent, int last_ref);
2164 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
2165 struct btrfs_root *root,
2166 u64 bytenr, u32 blocksize,
2167 int level);
2168 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2169 struct btrfs_root *root,
2170 u64 root_objectid, u64 owner,
2171 u64 offset, struct btrfs_key *ins);
2172 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2173 struct btrfs_root *root,
2174 u64 root_objectid, u64 owner, u64 offset,
2175 struct btrfs_key *ins);
2176 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2177 struct btrfs_root *root,
2178 u64 num_bytes, u64 min_alloc_size,
2179 u64 empty_size, u64 hint_byte,
2180 u64 search_end, struct btrfs_key *ins,
2181 u64 data);
2182 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2183 struct extent_buffer *buf, int full_backref);
2184 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2185 struct extent_buffer *buf, int full_backref);
2186 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2187 struct btrfs_root *root,
2188 u64 bytenr, u64 num_bytes, u64 flags,
2189 int is_data);
2190 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2191 struct btrfs_root *root,
2192 u64 bytenr, u64 num_bytes, u64 parent,
2193 u64 root_objectid, u64 owner, u64 offset);
2195 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2196 int btrfs_update_reserved_bytes(struct btrfs_block_group_cache *cache,
2197 u64 num_bytes, int reserve, int sinfo);
2198 int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2199 struct btrfs_root *root);
2200 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2201 struct btrfs_root *root);
2202 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2203 struct btrfs_root *root,
2204 u64 bytenr, u64 num_bytes, u64 parent,
2205 u64 root_objectid, u64 owner, u64 offset);
2207 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2208 struct btrfs_root *root);
2209 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2210 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2211 int btrfs_read_block_groups(struct btrfs_root *root);
2212 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2213 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2214 struct btrfs_root *root, u64 bytes_used,
2215 u64 type, u64 chunk_objectid, u64 chunk_offset,
2216 u64 size);
2217 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2218 struct btrfs_root *root, u64 group_start);
2219 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2220 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2221 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2222 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2223 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
2224 void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2225 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
2226 struct btrfs_root *root,
2227 int num_items);
2228 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2229 struct btrfs_root *root);
2230 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2231 struct inode *inode);
2232 void btrfs_orphan_release_metadata(struct inode *inode);
2233 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
2234 struct btrfs_pending_snapshot *pending);
2235 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2236 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2237 int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
2238 void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2239 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
2240 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
2241 void btrfs_free_block_rsv(struct btrfs_root *root,
2242 struct btrfs_block_rsv *rsv);
2243 void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
2244 struct btrfs_block_rsv *rsv);
2245 int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
2246 struct btrfs_root *root,
2247 struct btrfs_block_rsv *block_rsv,
2248 u64 num_bytes);
2249 int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
2250 struct btrfs_root *root,
2251 struct btrfs_block_rsv *block_rsv,
2252 u64 min_reserved, int min_factor);
2253 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2254 struct btrfs_block_rsv *dst_rsv,
2255 u64 num_bytes);
2256 void btrfs_block_rsv_release(struct btrfs_root *root,
2257 struct btrfs_block_rsv *block_rsv,
2258 u64 num_bytes);
2259 int btrfs_truncate_reserve_metadata(struct btrfs_trans_handle *trans,
2260 struct btrfs_root *root,
2261 struct btrfs_block_rsv *rsv);
2262 int btrfs_set_block_group_ro(struct btrfs_root *root,
2263 struct btrfs_block_group_cache *cache);
2264 int btrfs_set_block_group_rw(struct btrfs_root *root,
2265 struct btrfs_block_group_cache *cache);
2266 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2267 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2268 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2269 u64 start, u64 end);
2270 int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2271 u64 num_bytes, u64 *actual_bytes);
2272 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2273 struct btrfs_root *root, u64 type);
2274 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2276 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2277 /* ctree.c */
2278 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2279 int level, int *slot);
2280 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2281 int btrfs_previous_item(struct btrfs_root *root,
2282 struct btrfs_path *path, u64 min_objectid,
2283 int type);
2284 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2285 struct btrfs_root *root, struct btrfs_path *path,
2286 struct btrfs_key *new_key);
2287 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2288 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2289 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2290 struct btrfs_key *key, int lowest_level,
2291 int cache_only, u64 min_trans);
2292 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2293 struct btrfs_key *max_key,
2294 struct btrfs_path *path, int cache_only,
2295 u64 min_trans);
2296 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2297 struct btrfs_root *root, struct extent_buffer *buf,
2298 struct extent_buffer *parent, int parent_slot,
2299 struct extent_buffer **cow_ret);
2300 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2301 struct btrfs_root *root,
2302 struct extent_buffer *buf,
2303 struct extent_buffer **cow_ret, u64 new_root_objectid);
2304 int btrfs_block_can_be_shared(struct btrfs_root *root,
2305 struct extent_buffer *buf);
2306 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2307 *root, struct btrfs_path *path, u32 data_size);
2308 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2309 struct btrfs_root *root,
2310 struct btrfs_path *path,
2311 u32 new_size, int from_end);
2312 int btrfs_split_item(struct btrfs_trans_handle *trans,
2313 struct btrfs_root *root,
2314 struct btrfs_path *path,
2315 struct btrfs_key *new_key,
2316 unsigned long split_offset);
2317 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2318 struct btrfs_root *root,
2319 struct btrfs_path *path,
2320 struct btrfs_key *new_key);
2321 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2322 *root, struct btrfs_key *key, struct btrfs_path *p, int
2323 ins_len, int cow);
2324 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2325 struct btrfs_root *root, struct extent_buffer *parent,
2326 int start_slot, int cache_only, u64 *last_ret,
2327 struct btrfs_key *progress);
2328 void btrfs_release_path(struct btrfs_path *p);
2329 struct btrfs_path *btrfs_alloc_path(void);
2330 void btrfs_free_path(struct btrfs_path *p);
2331 void btrfs_set_path_blocking(struct btrfs_path *p);
2332 void btrfs_clear_path_blocking(struct btrfs_path *p,
2333 struct extent_buffer *held);
2334 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2336 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2337 struct btrfs_path *path, int slot, int nr);
2338 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2339 struct btrfs_root *root,
2340 struct btrfs_path *path)
2342 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2345 int setup_items_for_insert(struct btrfs_trans_handle *trans,
2346 struct btrfs_root *root, struct btrfs_path *path,
2347 struct btrfs_key *cpu_key, u32 *data_size,
2348 u32 total_data, u32 total_size, int nr);
2349 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2350 *root, struct btrfs_key *key, void *data, u32 data_size);
2351 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2352 struct btrfs_root *root,
2353 struct btrfs_path *path,
2354 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2356 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2357 struct btrfs_root *root,
2358 struct btrfs_path *path,
2359 struct btrfs_key *key,
2360 u32 data_size)
2362 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2365 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2366 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2367 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2368 int btrfs_drop_snapshot(struct btrfs_root *root,
2369 struct btrfs_block_rsv *block_rsv, int update_ref);
2370 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2371 struct btrfs_root *root,
2372 struct extent_buffer *node,
2373 struct extent_buffer *parent);
2374 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2377 * Get synced with close_ctree()
2379 smp_mb();
2380 return fs_info->closing;
2383 /* root-item.c */
2384 int btrfs_find_root_ref(struct btrfs_root *tree_root,
2385 struct btrfs_path *path,
2386 u64 root_id, u64 ref_id);
2387 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2388 struct btrfs_root *tree_root,
2389 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2390 const char *name, int name_len);
2391 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2392 struct btrfs_root *tree_root,
2393 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2394 const char *name, int name_len);
2395 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2396 struct btrfs_key *key);
2397 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2398 *root, struct btrfs_key *key, struct btrfs_root_item
2399 *item);
2400 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2401 *root, struct btrfs_key *key, struct btrfs_root_item
2402 *item);
2403 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2404 btrfs_root_item *item, struct btrfs_key *key);
2405 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2406 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2407 int btrfs_set_root_node(struct btrfs_root_item *item,
2408 struct extent_buffer *node);
2409 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2411 /* dir-item.c */
2412 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2413 struct btrfs_root *root, const char *name,
2414 int name_len, struct inode *dir,
2415 struct btrfs_key *location, u8 type, u64 index);
2416 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2417 struct btrfs_root *root,
2418 struct btrfs_path *path, u64 dir,
2419 const char *name, int name_len,
2420 int mod);
2421 struct btrfs_dir_item *
2422 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2423 struct btrfs_root *root,
2424 struct btrfs_path *path, u64 dir,
2425 u64 objectid, const char *name, int name_len,
2426 int mod);
2427 struct btrfs_dir_item *
2428 btrfs_search_dir_index_item(struct btrfs_root *root,
2429 struct btrfs_path *path, u64 dirid,
2430 const char *name, int name_len);
2431 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2432 struct btrfs_path *path,
2433 const char *name, int name_len);
2434 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2435 struct btrfs_root *root,
2436 struct btrfs_path *path,
2437 struct btrfs_dir_item *di);
2438 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2439 struct btrfs_root *root,
2440 struct btrfs_path *path, u64 objectid,
2441 const char *name, u16 name_len,
2442 const void *data, u16 data_len);
2443 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2444 struct btrfs_root *root,
2445 struct btrfs_path *path, u64 dir,
2446 const char *name, u16 name_len,
2447 int mod);
2448 int verify_dir_item(struct btrfs_root *root,
2449 struct extent_buffer *leaf,
2450 struct btrfs_dir_item *dir_item);
2452 /* orphan.c */
2453 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2454 struct btrfs_root *root, u64 offset);
2455 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2456 struct btrfs_root *root, u64 offset);
2457 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2459 /* inode-item.c */
2460 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2461 struct btrfs_root *root,
2462 const char *name, int name_len,
2463 u64 inode_objectid, u64 ref_objectid, u64 index);
2464 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2465 struct btrfs_root *root,
2466 const char *name, int name_len,
2467 u64 inode_objectid, u64 ref_objectid, u64 *index);
2468 struct btrfs_inode_ref *
2469 btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2470 struct btrfs_root *root,
2471 struct btrfs_path *path,
2472 const char *name, int name_len,
2473 u64 inode_objectid, u64 ref_objectid, int mod);
2474 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2475 struct btrfs_root *root,
2476 struct btrfs_path *path, u64 objectid);
2477 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2478 *root, struct btrfs_path *path,
2479 struct btrfs_key *location, int mod);
2481 /* file-item.c */
2482 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2483 struct btrfs_root *root, u64 bytenr, u64 len);
2484 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2485 struct bio *bio, u32 *dst);
2486 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
2487 struct bio *bio, u64 logical_offset, u32 *dst);
2488 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2489 struct btrfs_root *root,
2490 u64 objectid, u64 pos,
2491 u64 disk_offset, u64 disk_num_bytes,
2492 u64 num_bytes, u64 offset, u64 ram_bytes,
2493 u8 compression, u8 encryption, u16 other_encoding);
2494 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2495 struct btrfs_root *root,
2496 struct btrfs_path *path, u64 objectid,
2497 u64 bytenr, int mod);
2498 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2499 struct btrfs_root *root,
2500 struct btrfs_ordered_sum *sums);
2501 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2502 struct bio *bio, u64 file_start, int contig);
2503 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2504 struct btrfs_root *root,
2505 struct btrfs_path *path,
2506 u64 bytenr, int cow);
2507 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2508 struct btrfs_root *root, struct btrfs_path *path,
2509 u64 isize);
2510 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2511 struct list_head *list, int search_commit);
2512 /* inode.c */
2514 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2515 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2516 #define ClearPageChecked ClearPageFsMisc
2517 #define SetPageChecked SetPageFsMisc
2518 #define PageChecked PageFsMisc
2519 #endif
2521 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2522 int btrfs_set_inode_index(struct inode *dir, u64 *index);
2523 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2524 struct btrfs_root *root,
2525 struct inode *dir, struct inode *inode,
2526 const char *name, int name_len);
2527 int btrfs_add_link(struct btrfs_trans_handle *trans,
2528 struct inode *parent_inode, struct inode *inode,
2529 const char *name, int name_len, int add_backref, u64 index);
2530 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2531 struct btrfs_root *root,
2532 struct inode *dir, u64 objectid,
2533 const char *name, int name_len);
2534 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2535 struct btrfs_root *root,
2536 struct inode *inode, u64 new_size,
2537 u32 min_type);
2539 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2540 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2541 struct extent_state **cached_state);
2542 int btrfs_writepages(struct address_space *mapping,
2543 struct writeback_control *wbc);
2544 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2545 struct btrfs_root *new_root, u64 new_dirid);
2546 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2547 size_t size, struct bio *bio, unsigned long bio_flags);
2549 unsigned long btrfs_force_ra(struct address_space *mapping,
2550 struct file_ra_state *ra, struct file *file,
2551 pgoff_t offset, pgoff_t last_index);
2552 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2553 int btrfs_readpage(struct file *file, struct page *page);
2554 void btrfs_evict_inode(struct inode *inode);
2555 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2556 void btrfs_dirty_inode(struct inode *inode, int flags);
2557 struct inode *btrfs_alloc_inode(struct super_block *sb);
2558 void btrfs_destroy_inode(struct inode *inode);
2559 int btrfs_drop_inode(struct inode *inode);
2560 int btrfs_init_cachep(void);
2561 void btrfs_destroy_cachep(void);
2562 long btrfs_ioctl_trans_end(struct file *file);
2563 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2564 struct btrfs_root *root, int *was_new);
2565 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2566 size_t pg_offset, u64 start, u64 end,
2567 int create);
2568 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2569 struct btrfs_root *root,
2570 struct inode *inode);
2571 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2572 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2573 int btrfs_orphan_cleanup(struct btrfs_root *root);
2574 void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle *trans,
2575 struct btrfs_pending_snapshot *pending,
2576 u64 *bytes_to_reserve);
2577 void btrfs_orphan_post_snapshot(struct btrfs_trans_handle *trans,
2578 struct btrfs_pending_snapshot *pending);
2579 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
2580 struct btrfs_root *root);
2581 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2582 int btrfs_invalidate_inodes(struct btrfs_root *root);
2583 void btrfs_add_delayed_iput(struct inode *inode);
2584 void btrfs_run_delayed_iputs(struct btrfs_root *root);
2585 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2586 u64 start, u64 num_bytes, u64 min_size,
2587 loff_t actual_len, u64 *alloc_hint);
2588 int btrfs_prealloc_file_range_trans(struct inode *inode,
2589 struct btrfs_trans_handle *trans, int mode,
2590 u64 start, u64 num_bytes, u64 min_size,
2591 loff_t actual_len, u64 *alloc_hint);
2592 extern const struct dentry_operations btrfs_dentry_operations;
2594 /* ioctl.c */
2595 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2596 void btrfs_update_iflags(struct inode *inode);
2597 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
2598 int btrfs_defrag_file(struct inode *inode, struct file *file,
2599 struct btrfs_ioctl_defrag_range_args *range,
2600 u64 newer_than, unsigned long max_pages);
2601 /* file.c */
2602 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2603 struct inode *inode);
2604 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2605 int btrfs_sync_file(struct file *file, int datasync);
2606 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2607 int skip_pinned);
2608 extern const struct file_operations btrfs_file_operations;
2609 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
2610 u64 start, u64 end, u64 *hint_byte, int drop_cache);
2611 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2612 struct inode *inode, u64 start, u64 end);
2613 int btrfs_release_file(struct inode *inode, struct file *file);
2614 void btrfs_drop_pages(struct page **pages, size_t num_pages);
2615 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
2616 struct page **pages, size_t num_pages,
2617 loff_t pos, size_t write_bytes,
2618 struct extent_state **cached);
2620 /* tree-defrag.c */
2621 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2622 struct btrfs_root *root, int cache_only);
2624 /* sysfs.c */
2625 int btrfs_init_sysfs(void);
2626 void btrfs_exit_sysfs(void);
2628 /* xattr.c */
2629 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2631 /* super.c */
2632 int btrfs_parse_options(struct btrfs_root *root, char *options);
2633 int btrfs_sync_fs(struct super_block *sb, int wait);
2634 void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
2635 unsigned int line, int errno);
2637 #define btrfs_std_error(fs_info, errno) \
2638 do { \
2639 if ((errno)) \
2640 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2641 } while (0)
2643 /* acl.c */
2644 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2645 int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags);
2646 #else
2647 #define btrfs_check_acl NULL
2648 #endif
2649 int btrfs_init_acl(struct btrfs_trans_handle *trans,
2650 struct inode *inode, struct inode *dir);
2651 int btrfs_acl_chmod(struct inode *inode);
2653 /* relocation.c */
2654 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2655 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2656 struct btrfs_root *root);
2657 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2658 struct btrfs_root *root);
2659 int btrfs_recover_relocation(struct btrfs_root *root);
2660 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
2661 void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
2662 struct btrfs_root *root, struct extent_buffer *buf,
2663 struct extent_buffer *cow);
2664 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
2665 struct btrfs_pending_snapshot *pending,
2666 u64 *bytes_to_reserve);
2667 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
2668 struct btrfs_pending_snapshot *pending);
2670 /* scrub.c */
2671 int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
2672 struct btrfs_scrub_progress *progress, int readonly);
2673 int btrfs_scrub_pause(struct btrfs_root *root);
2674 int btrfs_scrub_pause_super(struct btrfs_root *root);
2675 int btrfs_scrub_continue(struct btrfs_root *root);
2676 int btrfs_scrub_continue_super(struct btrfs_root *root);
2677 int btrfs_scrub_cancel(struct btrfs_root *root);
2678 int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
2679 int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
2680 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
2681 struct btrfs_scrub_progress *progress);
2683 #endif