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1/*
2 * Copyright (C) 2007 Oracle. All rights reserved.
3 *
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.
7 *
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.
12 *
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.
17 */
18
19#ifndef __BTRFS_CTREE__
20#define __BTRFS_CTREE__
21
22#include <linux/version.h>
23#include <linux/mm.h>
24#include <linux/highmem.h>
25#include <linux/fs.h>
26#include <linux/completion.h>
27#include <linux/backing-dev.h>
28#include <linux/wait.h>
29#include <asm/kmap_types.h>
30#include "extent_io.h"
31#include "extent_map.h"
32#include "async-thread.h"
33
34struct btrfs_trans_handle;
35struct btrfs_transaction;
36extern struct kmem_cache *btrfs_trans_handle_cachep;
37extern struct kmem_cache *btrfs_transaction_cachep;
38extern struct kmem_cache *btrfs_bit_radix_cachep;
39extern struct kmem_cache *btrfs_path_cachep;
40struct btrfs_ordered_sum;
41
42#define BTRFS_MAGIC "_BBRfS_M"
43
44#define BTRFS_ACL_NOT_CACHED ((void *)-1)
45
46#ifdef CONFIG_LOCKDEP
47# define BTRFS_MAX_LEVEL 7
48#else
49# define BTRFS_MAX_LEVEL 8
50#endif
51
52/* holds pointers to all of the tree roots */
53#define BTRFS_ROOT_TREE_OBJECTID 1ULL
54
55/* stores information about which extents are in use, and reference counts */
56#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
57
58/*
59 * chunk tree stores translations from logical -> physical block numbering
60 * the super block points to the chunk tree
61 */
62#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
63
64/*
65 * stores information about which areas of a given device are in use.
66 * one per device. The tree of tree roots points to the device tree
67 */
68#define BTRFS_DEV_TREE_OBJECTID 4ULL
69
70/* one per subvolume, storing files and directories */
71#define BTRFS_FS_TREE_OBJECTID 5ULL
72
73/* directory objectid inside the root tree */
74#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
75
76/* orhpan objectid for tracking unlinked/truncated files */
77#define BTRFS_ORPHAN_OBJECTID -5ULL
78
79/* does write ahead logging to speed up fsyncs */
80#define BTRFS_TREE_LOG_OBJECTID -6ULL
81#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
82
83/* for space balancing */
84#define BTRFS_TREE_RELOC_OBJECTID -8ULL
85#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
86
87/* dummy objectid represents multiple objectids */
88#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
89
90/*
91 * All files have objectids in this range.
92 */
93#define BTRFS_FIRST_FREE_OBJECTID 256ULL
94#define BTRFS_LAST_FREE_OBJECTID -256ULL
95#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
96
97
98/*
99 * the device items go into the chunk tree. The key is in the form
100 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
101 */
102#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
103
104/*
105 * we can actually store much bigger names, but lets not confuse the rest
106 * of linux
107 */
108#define BTRFS_NAME_LEN 255
109
110/* 32 bytes in various csum fields */
111#define BTRFS_CSUM_SIZE 32
112/* four bytes for CRC32 */
113#define BTRFS_CRC32_SIZE 4
114#define BTRFS_EMPTY_DIR_SIZE 0
115
116#define BTRFS_FT_UNKNOWN 0
117#define BTRFS_FT_REG_FILE 1
118#define BTRFS_FT_DIR 2
119#define BTRFS_FT_CHRDEV 3
120#define BTRFS_FT_BLKDEV 4
121#define BTRFS_FT_FIFO 5
122#define BTRFS_FT_SOCK 6
123#define BTRFS_FT_SYMLINK 7
124#define BTRFS_FT_XATTR 8
125#define BTRFS_FT_MAX 9
126
127/*
128 * the key defines the order in the tree, and so it also defines (optimal)
129 * block layout. objectid corresonds to the inode number. The flags
130 * tells us things about the object, and is a kind of stream selector.
131 * so for a given inode, keys with flags of 1 might refer to the inode
132 * data, flags of 2 may point to file data in the btree and flags == 3
133 * may point to extents.
134 *
135 * offset is the starting byte offset for this key in the stream.
136 *
137 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
138 * in cpu native order. Otherwise they are identical and their sizes
139 * should be the same (ie both packed)
140 */
141struct btrfs_disk_key {
142 __le64 objectid;
143 u8 type;
144 __le64 offset;
145} __attribute__ ((__packed__));
146
147struct btrfs_key {
148 u64 objectid;
149 u8 type;
150 u64 offset;
151} __attribute__ ((__packed__));
152
153struct btrfs_mapping_tree {
154 struct extent_map_tree map_tree;
155};
156
157#define BTRFS_UUID_SIZE 16
158struct btrfs_dev_item {
159 /* the internal btrfs device id */
160 __le64 devid;
161
162 /* size of the device */
163 __le64 total_bytes;
164
165 /* bytes used */
166 __le64 bytes_used;
167
168 /* optimal io alignment for this device */
169 __le32 io_align;
170
171 /* optimal io width for this device */
172 __le32 io_width;
173
174 /* minimal io size for this device */
175 __le32 sector_size;
176
177 /* type and info about this device */
178 __le64 type;
179
180 /* grouping information for allocation decisions */
181 __le32 dev_group;
182
183 /* seek speed 0-100 where 100 is fastest */
184 u8 seek_speed;
185
186 /* bandwidth 0-100 where 100 is fastest */
187 u8 bandwidth;
188
189 /* btrfs generated uuid for this device */
190 u8 uuid[BTRFS_UUID_SIZE];
191} __attribute__ ((__packed__));
192
193struct btrfs_stripe {
194 __le64 devid;
195 __le64 offset;
196 u8 dev_uuid[BTRFS_UUID_SIZE];
197} __attribute__ ((__packed__));
198
199struct btrfs_chunk {
200 /* size of this chunk in bytes */
201 __le64 length;
202
203 /* objectid of the root referencing this chunk */
204 __le64 owner;
205
206 __le64 stripe_len;
207 __le64 type;
208
209 /* optimal io alignment for this chunk */
210 __le32 io_align;
211
212 /* optimal io width for this chunk */
213 __le32 io_width;
214
215 /* minimal io size for this chunk */
216 __le32 sector_size;
217
218 /* 2^16 stripes is quite a lot, a second limit is the size of a single
219 * item in the btree
220 */
221 __le16 num_stripes;
222
223 /* sub stripes only matter for raid10 */
224 __le16 sub_stripes;
225 struct btrfs_stripe stripe;
226 /* additional stripes go here */
227} __attribute__ ((__packed__));
228
229static inline unsigned long btrfs_chunk_item_size(int num_stripes)
230{
231 BUG_ON(num_stripes == 0);
232 return sizeof(struct btrfs_chunk) +
233 sizeof(struct btrfs_stripe) * (num_stripes - 1);
234}
235
236#define BTRFS_FSID_SIZE 16
237#define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
238
239/*
240 * every tree block (leaf or node) starts with this header.
241 */
242struct btrfs_header {
243 /* these first four must match the super block */
244 u8 csum[BTRFS_CSUM_SIZE];
245 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
246 __le64 bytenr; /* which block this node is supposed to live in */
247 __le64 flags;
248
249 /* allowed to be different from the super from here on down */
250 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
251 __le64 generation;
252 __le64 owner;
253 __le32 nritems;
254 u8 level;
255} __attribute__ ((__packed__));
256
257#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
258 sizeof(struct btrfs_header)) / \
259 sizeof(struct btrfs_key_ptr))
260#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
261#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
262#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
263 sizeof(struct btrfs_item) - \
264 sizeof(struct btrfs_file_extent_item))
265
266
267/*
268 * this is a very generous portion of the super block, giving us
269 * room to translate 14 chunks with 3 stripes each.
270 */
271#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
272#define BTRFS_LABEL_SIZE 256
273
274/*
275 * the super block basically lists the main trees of the FS
276 * it currently lacks any block count etc etc
277 */
278struct btrfs_super_block {
279 u8 csum[BTRFS_CSUM_SIZE];
280 /* the first 4 fields must match struct btrfs_header */
281 u8 fsid[16]; /* FS specific uuid */
282 __le64 bytenr; /* this block number */
283 __le64 flags;
284
285 /* allowed to be different from the btrfs_header from here own down */
286 __le64 magic;
287 __le64 generation;
288 __le64 root;
289 __le64 chunk_root;
290 __le64 log_root;
291 __le64 total_bytes;
292 __le64 bytes_used;
293 __le64 root_dir_objectid;
294 __le64 num_devices;
295 __le32 sectorsize;
296 __le32 nodesize;
297 __le32 leafsize;
298 __le32 stripesize;
299 __le32 sys_chunk_array_size;
300 u8 root_level;
301 u8 chunk_root_level;
302 u8 log_root_level;
303 struct btrfs_dev_item dev_item;
304 char label[BTRFS_LABEL_SIZE];
305 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
306} __attribute__ ((__packed__));
307
308/*
309 * A leaf is full of items. offset and size tell us where to find
310 * the item in the leaf (relative to the start of the data area)
311 */
312struct btrfs_item {
313 struct btrfs_disk_key key;
314 __le32 offset;
315 __le32 size;
316} __attribute__ ((__packed__));
317
318/*
319 * leaves have an item area and a data area:
320 * [item0, item1....itemN] [free space] [dataN...data1, data0]
321 *
322 * The data is separate from the items to get the keys closer together
323 * during searches.
324 */
325struct btrfs_leaf {
326 struct btrfs_header header;
327 struct btrfs_item items[];
328} __attribute__ ((__packed__));
329
330/*
331 * all non-leaf blocks are nodes, they hold only keys and pointers to
332 * other blocks
333 */
334struct btrfs_key_ptr {
335 struct btrfs_disk_key key;
336 __le64 blockptr;
337 __le64 generation;
338} __attribute__ ((__packed__));
339
340struct btrfs_node {
341 struct btrfs_header header;
342 struct btrfs_key_ptr ptrs[];
343} __attribute__ ((__packed__));
344
345/*
346 * btrfs_paths remember the path taken from the root down to the leaf.
347 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
348 * to any other levels that are present.
349 *
350 * The slots array records the index of the item or block pointer
351 * used while walking the tree.
352 */
353struct btrfs_path {
354 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
355 int slots[BTRFS_MAX_LEVEL];
356 /* if there is real range locking, this locks field will change */
357 int locks[BTRFS_MAX_LEVEL];
358 int reada;
359 /* keep some upper locks as we walk down */
360 int keep_locks;
361 int skip_locking;
362 int lowest_level;
363};
364
365/*
366 * items in the extent btree are used to record the objectid of the
367 * owner of the block and the number of references
368 */
369struct btrfs_extent_item {
370 __le32 refs;
371} __attribute__ ((__packed__));
372
373struct btrfs_extent_ref {
374 __le64 root;
375 __le64 generation;
376 __le64 objectid;
377 __le32 num_refs;
378} __attribute__ ((__packed__));
379
380/* dev extents record free space on individual devices. The owner
381 * field points back to the chunk allocation mapping tree that allocated
382 * the extent. The chunk tree uuid field is a way to double check the owner
383 */
384struct btrfs_dev_extent {
385 __le64 chunk_tree;
386 __le64 chunk_objectid;
387 __le64 chunk_offset;
388 __le64 length;
389 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
390} __attribute__ ((__packed__));
391
392struct btrfs_inode_ref {
393 __le64 index;
394 __le16 name_len;
395 /* name goes here */
396} __attribute__ ((__packed__));
397
398struct btrfs_timespec {
399 __le64 sec;
400 __le32 nsec;
401} __attribute__ ((__packed__));
402
403/*
404 * there is no padding here on purpose. If you want to extent the inode,
405 * make a new item type
406 */
407struct btrfs_inode_item {
408 /* nfs style generation number */
409 __le64 generation;
410 /* transid that last touched this inode */
411 __le64 transid;
412 __le64 size;
413 __le64 nbytes;
414 __le64 block_group;
415 __le32 nlink;
416 __le32 uid;
417 __le32 gid;
418 __le32 mode;
419 __le64 rdev;
420 __le16 flags;
421 __le16 compat_flags;
422 struct btrfs_timespec atime;
423 struct btrfs_timespec ctime;
424 struct btrfs_timespec mtime;
425 struct btrfs_timespec otime;
426} __attribute__ ((__packed__));
427
428struct btrfs_dir_log_item {
429 __le64 end;
430} __attribute__ ((__packed__));
431
432struct btrfs_dir_item {
433 struct btrfs_disk_key location;
434 __le64 transid;
435 __le16 data_len;
436 __le16 name_len;
437 u8 type;
438} __attribute__ ((__packed__));
439
440struct btrfs_root_item {
441 struct btrfs_inode_item inode;
442 __le64 root_dirid;
443 __le64 bytenr;
444 __le64 byte_limit;
445 __le64 bytes_used;
446 __le32 flags;
447 __le32 refs;
448 struct btrfs_disk_key drop_progress;
449 u8 drop_level;
450 u8 level;
451} __attribute__ ((__packed__));
452
453#define BTRFS_FILE_EXTENT_REG 0
454#define BTRFS_FILE_EXTENT_INLINE 1
455
456struct btrfs_file_extent_item {
457 __le64 generation;
458 u8 type;
459 /*
460 * disk space consumed by the extent, checksum blocks are included
461 * in these numbers
462 */
463 __le64 disk_bytenr;
464 __le64 disk_num_bytes;
465 /*
466 * the logical offset in file blocks (no csums)
467 * this extent record is for. This allows a file extent to point
468 * into the middle of an existing extent on disk, sharing it
469 * between two snapshots (useful if some bytes in the middle of the
470 * extent have changed
471 */
472 __le64 offset;
473 /*
474 * the logical number of file blocks (no csums included)
475 */
476 __le64 num_bytes;
477} __attribute__ ((__packed__));
478
479struct btrfs_csum_item {
480 u8 csum;
481} __attribute__ ((__packed__));
482
483/* different types of block groups (and chunks) */
484#define BTRFS_BLOCK_GROUP_DATA (1 << 0)
485#define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
486#define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
487#define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
488#define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
489#define BTRFS_BLOCK_GROUP_DUP (1 << 5)
490#define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
491
492struct btrfs_block_group_item {
493 __le64 used;
494 __le64 chunk_objectid;
495 __le64 flags;
496} __attribute__ ((__packed__));
497
498struct btrfs_space_info {
499 u64 flags;
500 u64 total_bytes;
501 u64 bytes_used;
502 u64 bytes_pinned;
503 u64 bytes_reserved;
504 int full;
505 int force_alloc;
506 struct list_head list;
507
508 /* for block groups in our same type */
509 struct list_head block_groups;
510 spinlock_t lock;
511};
512
513struct btrfs_free_space {
514 struct rb_node bytes_index;
515 struct rb_node offset_index;
516 u64 offset;
517 u64 bytes;
518};
519
520struct btrfs_block_group_cache {
521 struct btrfs_key key;
522 struct btrfs_block_group_item item;
523 spinlock_t lock;
524 u64 pinned;
525 u64 reserved;
526 u64 flags;
527 int cached;
528 int ro;
529 int dirty;
530
531 struct btrfs_space_info *space_info;
532
533 /* free space cache stuff */
534 struct rb_root free_space_bytes;
535 struct rb_root free_space_offset;
536
537 /* block group cache stuff */
538 struct rb_node cache_node;
539
540 /* for block groups in the same raid type */
541 struct list_head list;
542};
543
544struct btrfs_leaf_ref_tree {
545 struct rb_root root;
546 struct list_head list;
547 spinlock_t lock;
548};
549
550struct btrfs_device;
551struct btrfs_fs_devices;
552struct btrfs_fs_info {
553 u8 fsid[BTRFS_FSID_SIZE];
554 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
555 struct btrfs_root *extent_root;
556 struct btrfs_root *tree_root;
557 struct btrfs_root *chunk_root;
558 struct btrfs_root *dev_root;
559
560 /* the log root tree is a directory of all the other log roots */
561 struct btrfs_root *log_root_tree;
562 struct radix_tree_root fs_roots_radix;
563
564 /* block group cache stuff */
565 spinlock_t block_group_cache_lock;
566 struct rb_root block_group_cache_tree;
567
568 struct extent_io_tree pinned_extents;
569 struct extent_io_tree pending_del;
570 struct extent_io_tree extent_ins;
571
572 /* logical->physical extent mapping */
573 struct btrfs_mapping_tree mapping_tree;
574
575 u64 generation;
576 u64 last_trans_committed;
577 u64 last_trans_new_blockgroup;
578 u64 open_ioctl_trans;
579 unsigned long mount_opt;
580 u64 max_extent;
581 u64 max_inline;
582 u64 alloc_start;
583 struct btrfs_transaction *running_transaction;
584 wait_queue_head_t transaction_throttle;
585 wait_queue_head_t transaction_wait;
586 wait_queue_head_t async_submit_wait;
587
588 wait_queue_head_t tree_log_wait;
589
590 struct btrfs_super_block super_copy;
591 struct btrfs_super_block super_for_commit;
592 struct block_device *__bdev;
593 struct super_block *sb;
594 struct inode *btree_inode;
595 struct backing_dev_info bdi;
596 spinlock_t hash_lock;
597 struct mutex trans_mutex;
598 struct mutex tree_log_mutex;
599 struct mutex transaction_kthread_mutex;
600 struct mutex cleaner_mutex;
601 struct mutex alloc_mutex;
602 struct mutex chunk_mutex;
603 struct mutex drop_mutex;
604 struct mutex volume_mutex;
605 struct mutex tree_reloc_mutex;
606 struct list_head trans_list;
607 struct list_head hashers;
608 struct list_head dead_roots;
609
610 atomic_t nr_async_submits;
611 atomic_t async_submit_draining;
612 atomic_t nr_async_bios;
613 atomic_t tree_log_writers;
614 atomic_t tree_log_commit;
615 unsigned long tree_log_batch;
616 u64 tree_log_transid;
617
618 /*
619 * this is used by the balancing code to wait for all the pending
620 * ordered extents
621 */
622 spinlock_t ordered_extent_lock;
623 struct list_head ordered_extents;
624 struct list_head delalloc_inodes;
625
626 /*
627 * there is a pool of worker threads for checksumming during writes
628 * and a pool for checksumming after reads. This is because readers
629 * can run with FS locks held, and the writers may be waiting for
630 * those locks. We don't want ordering in the pending list to cause
631 * deadlocks, and so the two are serviced separately.
632 *
633 * A third pool does submit_bio to avoid deadlocking with the other
634 * two
635 */
636 struct btrfs_workers workers;
637 struct btrfs_workers endio_workers;
638 struct btrfs_workers endio_write_workers;
639 struct btrfs_workers submit_workers;
640 /*
641 * fixup workers take dirty pages that didn't properly go through
642 * the cow mechanism and make them safe to write. It happens
643 * for the sys_munmap function call path
644 */
645 struct btrfs_workers fixup_workers;
646 struct task_struct *transaction_kthread;
647 struct task_struct *cleaner_kthread;
648 int thread_pool_size;
649
650 /* tree relocation relocated fields */
651 struct extent_io_tree reloc_mapping_tree;
652 struct list_head dead_reloc_roots;
653 struct btrfs_leaf_ref_tree reloc_ref_tree;
654 struct btrfs_leaf_ref_tree shared_ref_tree;
655
656 struct kobject super_kobj;
657 struct completion kobj_unregister;
658 int do_barriers;
659 int closing;
660 int log_root_recovering;
661 atomic_t throttles;
662 atomic_t throttle_gen;
663
664 u64 total_pinned;
665 struct list_head dirty_cowonly_roots;
666
667 struct btrfs_fs_devices *fs_devices;
668 struct list_head space_info;
669 spinlock_t delalloc_lock;
670 spinlock_t new_trans_lock;
671 u64 delalloc_bytes;
672 u64 last_alloc;
673 u64 last_data_alloc;
674
675 spinlock_t ref_cache_lock;
676 u64 total_ref_cache_size;
677
678 u64 avail_data_alloc_bits;
679 u64 avail_metadata_alloc_bits;
680 u64 avail_system_alloc_bits;
681 u64 data_alloc_profile;
682 u64 metadata_alloc_profile;
683 u64 system_alloc_profile;
684
685 void *bdev_holder;
686};
687
688/*
689 * in ram representation of the tree. extent_root is used for all allocations
690 * and for the extent tree extent_root root.
691 */
692struct btrfs_dirty_root;
693struct btrfs_root {
694 struct extent_buffer *node;
695
696 /* the node lock is held while changing the node pointer */
697 spinlock_t node_lock;
698
699 struct extent_buffer *commit_root;
700 struct btrfs_leaf_ref_tree *ref_tree;
701 struct btrfs_leaf_ref_tree ref_tree_struct;
702 struct btrfs_dirty_root *dirty_root;
703 struct btrfs_root *log_root;
704 struct btrfs_root *reloc_root;
705
706 struct btrfs_root_item root_item;
707 struct btrfs_key root_key;
708 struct btrfs_fs_info *fs_info;
709 struct inode *inode;
710 struct extent_io_tree dirty_log_pages;
711
712 struct kobject root_kobj;
713 struct completion kobj_unregister;
714 struct mutex objectid_mutex;
715 struct mutex log_mutex;
716
717 u64 objectid;
718 u64 last_trans;
719
720 /* data allocations are done in sectorsize units */
721 u32 sectorsize;
722
723 /* node allocations are done in nodesize units */
724 u32 nodesize;
725
726 /* leaf allocations are done in leafsize units */
727 u32 leafsize;
728
729 u32 stripesize;
730
731 u32 type;
732 u64 highest_inode;
733 u64 last_inode_alloc;
734 int ref_cows;
735 int track_dirty;
736 u64 defrag_trans_start;
737 struct btrfs_key defrag_progress;
738 struct btrfs_key defrag_max;
739 int defrag_running;
740 int defrag_level;
741 char *name;
742 int in_sysfs;
743
744 /* the dirty list is only used by non-reference counted roots */
745 struct list_head dirty_list;
746
747 spinlock_t list_lock;
748 struct list_head dead_list;
749 struct list_head orphan_list;
750};
751
752/*
753
754 * inode items have the data typically returned from stat and store other
755 * info about object characteristics. There is one for every file and dir in
756 * the FS
757 */
758#define BTRFS_INODE_ITEM_KEY 1
759#define BTRFS_INODE_REF_KEY 2
760#define BTRFS_XATTR_ITEM_KEY 8
761#define BTRFS_ORPHAN_ITEM_KEY 9
762/* reserve 2-15 close to the inode for later flexibility */
763
764/*
765 * dir items are the name -> inode pointers in a directory. There is one
766 * for every name in a directory.
767 */
768#define BTRFS_DIR_LOG_ITEM_KEY 14
769#define BTRFS_DIR_LOG_INDEX_KEY 15
770#define BTRFS_DIR_ITEM_KEY 16
771#define BTRFS_DIR_INDEX_KEY 17
772/*
773 * extent data is for file data
774 */
775#define BTRFS_EXTENT_DATA_KEY 18
776/*
777 * csum items have the checksums for data in the extents
778 */
779#define BTRFS_CSUM_ITEM_KEY 19
780
781
782/* reserve 21-31 for other file/dir stuff */
783
784/*
785 * root items point to tree roots. There are typically in the root
786 * tree used by the super block to find all the other trees
787 */
788#define BTRFS_ROOT_ITEM_KEY 32
789/*
790 * extent items are in the extent map tree. These record which blocks
791 * are used, and how many references there are to each block
792 */
793#define BTRFS_EXTENT_ITEM_KEY 33
794#define BTRFS_EXTENT_REF_KEY 34
795
796/*
797 * block groups give us hints into the extent allocation trees. Which
798 * blocks are free etc etc
799 */
800#define BTRFS_BLOCK_GROUP_ITEM_KEY 50
801
802#define BTRFS_DEV_EXTENT_KEY 75
803#define BTRFS_DEV_ITEM_KEY 76
804#define BTRFS_CHUNK_ITEM_KEY 77
805
806/*
807 * string items are for debugging. They just store a short string of
808 * data in the FS
809 */
810#define BTRFS_STRING_ITEM_KEY 253
811
812#define BTRFS_MOUNT_NODATASUM (1 << 0)
813#define BTRFS_MOUNT_NODATACOW (1 << 1)
814#define BTRFS_MOUNT_NOBARRIER (1 << 2)
815#define BTRFS_MOUNT_SSD (1 << 3)
816#define BTRFS_MOUNT_DEGRADED (1 << 4)
817
818#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
819#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
820#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
821 BTRFS_MOUNT_##opt)
822/*
823 * Inode flags
824 */
825#define BTRFS_INODE_NODATASUM (1 << 0)
826#define BTRFS_INODE_NODATACOW (1 << 1)
827#define BTRFS_INODE_READONLY (1 << 2)
828#define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
829 ~BTRFS_INODE_##flag)
830#define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
831 BTRFS_INODE_##flag)
832#define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
833 BTRFS_INODE_##flag)
834/* some macros to generate set/get funcs for the struct fields. This
835 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
836 * one for u8:
837 */
838#define le8_to_cpu(v) (v)
839#define cpu_to_le8(v) (v)
840#define __le8 u8
841
842#define read_eb_member(eb, ptr, type, member, result) ( \
843 read_extent_buffer(eb, (char *)(result), \
844 ((unsigned long)(ptr)) + \
845 offsetof(type, member), \
846 sizeof(((type *)0)->member)))
847
848#define write_eb_member(eb, ptr, type, member, result) ( \
849 write_extent_buffer(eb, (char *)(result), \
850 ((unsigned long)(ptr)) + \
851 offsetof(type, member), \
852 sizeof(((type *)0)->member)))
853
854#ifndef BTRFS_SETGET_FUNCS
855#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
856u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
857void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
858#endif
859
860#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
861static inline u##bits btrfs_##name(struct extent_buffer *eb) \
862{ \
863 type *p = kmap_atomic(eb->first_page, KM_USER0); \
864 u##bits res = le##bits##_to_cpu(p->member); \
865 kunmap_atomic(p, KM_USER0); \
866 return res; \
867} \
868static inline void btrfs_set_##name(struct extent_buffer *eb, \
869 u##bits val) \
870{ \
871 type *p = kmap_atomic(eb->first_page, KM_USER0); \
872 p->member = cpu_to_le##bits(val); \
873 kunmap_atomic(p, KM_USER0); \
874}
875
876#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
877static inline u##bits btrfs_##name(type *s) \
878{ \
879 return le##bits##_to_cpu(s->member); \
880} \
881static inline void btrfs_set_##name(type *s, u##bits val) \
882{ \
883 s->member = cpu_to_le##bits(val); \
884}
885
886BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
887BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
888BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
889BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
890BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
891BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
892BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
893BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
894BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
895BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
896
897BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
898BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
899 total_bytes, 64);
900BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
901 bytes_used, 64);
902BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
903 io_align, 32);
904BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
905 io_width, 32);
906BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
907 sector_size, 32);
908BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
909BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
910 dev_group, 32);
911BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
912 seek_speed, 8);
913BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
914 bandwidth, 8);
915
916static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
917{
918 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
919}
920
921BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
922BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
923BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
924BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
925BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
926BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
927BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
928BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
929BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
930BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
931BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
932
933static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
934{
935 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
936}
937
938BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
939BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
940BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
941 stripe_len, 64);
942BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
943 io_align, 32);
944BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
945 io_width, 32);
946BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
947 sector_size, 32);
948BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
949BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
950 num_stripes, 16);
951BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
952 sub_stripes, 16);
953BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
954BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
955
956static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
957 int nr)
958{
959 unsigned long offset = (unsigned long)c;
960 offset += offsetof(struct btrfs_chunk, stripe);
961 offset += nr * sizeof(struct btrfs_stripe);
962 return (struct btrfs_stripe *)offset;
963}
964
965static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
966{
967 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
968}
969
970static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
971 struct btrfs_chunk *c, int nr)
972{
973 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
974}
975
976static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
977 struct btrfs_chunk *c, int nr,
978 u64 val)
979{
980 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
981}
982
983static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
984 struct btrfs_chunk *c, int nr)
985{
986 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
987}
988
989static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
990 struct btrfs_chunk *c, int nr,
991 u64 val)
992{
993 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
994}
995
996/* struct btrfs_block_group_item */
997BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
998 used, 64);
999BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1000 used, 64);
1001BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1002 struct btrfs_block_group_item, chunk_objectid, 64);
1003
1004BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1005 struct btrfs_block_group_item, chunk_objectid, 64);
1006BTRFS_SETGET_FUNCS(disk_block_group_flags,
1007 struct btrfs_block_group_item, flags, 64);
1008BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1009 struct btrfs_block_group_item, flags, 64);
1010
1011/* struct btrfs_inode_ref */
1012BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1013BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1014
1015/* struct btrfs_inode_item */
1016BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1017BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1018BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1019BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1020BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1021BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1022BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1023BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1024BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1025BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1026BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
1027BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
1028 compat_flags, 16);
1029
1030static inline struct btrfs_timespec *
1031btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1032{
1033 unsigned long ptr = (unsigned long)inode_item;
1034 ptr += offsetof(struct btrfs_inode_item, atime);
1035 return (struct btrfs_timespec *)ptr;
1036}
1037
1038static inline struct btrfs_timespec *
1039btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1040{
1041 unsigned long ptr = (unsigned long)inode_item;
1042 ptr += offsetof(struct btrfs_inode_item, mtime);
1043 return (struct btrfs_timespec *)ptr;
1044}
1045
1046static inline struct btrfs_timespec *
1047btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1048{
1049 unsigned long ptr = (unsigned long)inode_item;
1050 ptr += offsetof(struct btrfs_inode_item, ctime);
1051 return (struct btrfs_timespec *)ptr;
1052}
1053
1054static inline struct btrfs_timespec *
1055btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1056{
1057 unsigned long ptr = (unsigned long)inode_item;
1058 ptr += offsetof(struct btrfs_inode_item, otime);
1059 return (struct btrfs_timespec *)ptr;
1060}
1061
1062BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1063BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1064
1065/* struct btrfs_dev_extent */
1066BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1067 chunk_tree, 64);
1068BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1069 chunk_objectid, 64);
1070BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1071 chunk_offset, 64);
1072BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1073
1074static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1075{
1076 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1077 return (u8 *)((unsigned long)dev + ptr);
1078}
1079
1080/* struct btrfs_extent_ref */
1081BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1082BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1083BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1084BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1085
1086BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1087BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1088 generation, 64);
1089BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1090 objectid, 64);
1091BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1092 num_refs, 32);
1093
1094/* struct btrfs_extent_item */
1095BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1096BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1097 refs, 32);
1098
1099/* struct btrfs_node */
1100BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1101BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1102
1103static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1104{
1105 unsigned long ptr;
1106 ptr = offsetof(struct btrfs_node, ptrs) +
1107 sizeof(struct btrfs_key_ptr) * nr;
1108 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1109}
1110
1111static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1112 int nr, u64 val)
1113{
1114 unsigned long ptr;
1115 ptr = offsetof(struct btrfs_node, ptrs) +
1116 sizeof(struct btrfs_key_ptr) * nr;
1117 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1118}
1119
1120static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1121{
1122 unsigned long ptr;
1123 ptr = offsetof(struct btrfs_node, ptrs) +
1124 sizeof(struct btrfs_key_ptr) * nr;
1125 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1126}
1127
1128static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1129 int nr, u64 val)
1130{
1131 unsigned long ptr;
1132 ptr = offsetof(struct btrfs_node, ptrs) +
1133 sizeof(struct btrfs_key_ptr) * nr;
1134 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1135}
1136
1137static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1138{
1139 return offsetof(struct btrfs_node, ptrs) +
1140 sizeof(struct btrfs_key_ptr) * nr;
1141}
1142
1143void btrfs_node_key(struct extent_buffer *eb,
1144 struct btrfs_disk_key *disk_key, int nr);
1145
1146static inline void btrfs_set_node_key(struct extent_buffer *eb,
1147 struct btrfs_disk_key *disk_key, int nr)
1148{
1149 unsigned long ptr;
1150 ptr = btrfs_node_key_ptr_offset(nr);
1151 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1152 struct btrfs_key_ptr, key, disk_key);
1153}
1154
1155/* struct btrfs_item */
1156BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1157BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1158
1159static inline unsigned long btrfs_item_nr_offset(int nr)
1160{
1161 return offsetof(struct btrfs_leaf, items) +
1162 sizeof(struct btrfs_item) * nr;
1163}
1164
1165static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1166 int nr)
1167{
1168 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1169}
1170
1171static inline u32 btrfs_item_end(struct extent_buffer *eb,
1172 struct btrfs_item *item)
1173{
1174 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1175}
1176
1177static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1178{
1179 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1180}
1181
1182static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1183{
1184 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1185}
1186
1187static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1188{
1189 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1190}
1191
1192static inline void btrfs_item_key(struct extent_buffer *eb,
1193 struct btrfs_disk_key *disk_key, int nr)
1194{
1195 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1196 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1197}
1198
1199static inline void btrfs_set_item_key(struct extent_buffer *eb,
1200 struct btrfs_disk_key *disk_key, int nr)
1201{
1202 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1203 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1204}
1205
1206BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1207
1208/* struct btrfs_dir_item */
1209BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1210BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1211BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1212BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1213
1214static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1215 struct btrfs_dir_item *item,
1216 struct btrfs_disk_key *key)
1217{
1218 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1219}
1220
1221static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1222 struct btrfs_dir_item *item,
1223 struct btrfs_disk_key *key)
1224{
1225 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1226}
1227
1228/* struct btrfs_disk_key */
1229BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1230 objectid, 64);
1231BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1232BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1233
1234static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1235 struct btrfs_disk_key *disk)
1236{
1237 cpu->offset = le64_to_cpu(disk->offset);
1238 cpu->type = disk->type;
1239 cpu->objectid = le64_to_cpu(disk->objectid);
1240}
1241
1242static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1243 struct btrfs_key *cpu)
1244{
1245 disk->offset = cpu_to_le64(cpu->offset);
1246 disk->type = cpu->type;
1247 disk->objectid = cpu_to_le64(cpu->objectid);
1248}
1249
1250static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1251 struct btrfs_key *key, int nr)
1252{
1253 struct btrfs_disk_key disk_key;
1254 btrfs_node_key(eb, &disk_key, nr);
1255 btrfs_disk_key_to_cpu(key, &disk_key);
1256}
1257
1258static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1259 struct btrfs_key *key, int nr)
1260{
1261 struct btrfs_disk_key disk_key;
1262 btrfs_item_key(eb, &disk_key, nr);
1263 btrfs_disk_key_to_cpu(key, &disk_key);
1264}
1265
1266static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1267 struct btrfs_dir_item *item,
1268 struct btrfs_key *key)
1269{
1270 struct btrfs_disk_key disk_key;
1271 btrfs_dir_item_key(eb, item, &disk_key);
1272 btrfs_disk_key_to_cpu(key, &disk_key);
1273}
1274
1275
1276static inline u8 btrfs_key_type(struct btrfs_key *key)
1277{
1278 return key->type;
1279}
1280
1281static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1282{
1283 key->type = val;
1284}
1285
1286/* struct btrfs_header */
1287BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1288BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1289 generation, 64);
1290BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1291BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1292BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1293BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1294
1295static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1296{
1297 return (btrfs_header_flags(eb) & flag) == flag;
1298}
1299
1300static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1301{
1302 u64 flags = btrfs_header_flags(eb);
1303 btrfs_set_header_flags(eb, flags | flag);
1304 return (flags & flag) == flag;
1305}
1306
1307static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1308{
1309 u64 flags = btrfs_header_flags(eb);
1310 btrfs_set_header_flags(eb, flags & ~flag);
1311 return (flags & flag) == flag;
1312}
1313
1314static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1315{
1316 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1317 return (u8 *)ptr;
1318}
1319
1320static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1321{
1322 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1323 return (u8 *)ptr;
1324}
1325
1326static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1327{
1328 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1329 return (u8 *)ptr;
1330}
1331
1332static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1333{
1334 unsigned long ptr = offsetof(struct btrfs_header, csum);
1335 return (u8 *)ptr;
1336}
1337
1338static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1339{
1340 return NULL;
1341}
1342
1343static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1344{
1345 return NULL;
1346}
1347
1348static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1349{
1350 return NULL;
1351}
1352
1353static inline int btrfs_is_leaf(struct extent_buffer *eb)
1354{
1355 return (btrfs_header_level(eb) == 0);
1356}
1357
1358/* struct btrfs_root_item */
1359BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1360BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1361BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1362
1363BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1364BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1365BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1366BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1367BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1368BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1369BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1370
1371/* struct btrfs_super_block */
1372BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1373BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1374BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1375 generation, 64);
1376BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1377BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1378 struct btrfs_super_block, sys_chunk_array_size, 32);
1379BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1380 root_level, 8);
1381BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1382 chunk_root, 64);
1383BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1384 chunk_root_level, 8);
1385BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1386 log_root, 64);
1387BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1388 log_root_level, 8);
1389BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1390 total_bytes, 64);
1391BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1392 bytes_used, 64);
1393BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1394 sectorsize, 32);
1395BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1396 nodesize, 32);
1397BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1398 leafsize, 32);
1399BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1400 stripesize, 32);
1401BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1402 root_dir_objectid, 64);
1403BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1404 num_devices, 64);
1405
1406static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1407{
1408 return offsetof(struct btrfs_leaf, items);
1409}
1410
1411/* struct btrfs_file_extent_item */
1412BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1413
1414static inline unsigned long btrfs_file_extent_inline_start(struct
1415 btrfs_file_extent_item *e)
1416{
1417 unsigned long offset = (unsigned long)e;
1418 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1419 return offset;
1420}
1421
1422static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1423{
1424 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1425}
1426
1427static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1428 struct btrfs_item *e)
1429{
1430 unsigned long offset;
1431 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1432 return btrfs_item_size(eb, e) - offset;
1433}
1434
1435BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1436 disk_bytenr, 64);
1437BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1438 generation, 64);
1439BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1440 disk_num_bytes, 64);
1441BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1442 offset, 64);
1443BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1444 num_bytes, 64);
1445
1446static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1447{
1448 return sb->s_fs_info;
1449}
1450
1451static inline int btrfs_set_root_name(struct btrfs_root *root,
1452 const char *name, int len)
1453{
1454 /* if we already have a name just free it */
1455 if (root->name)
1456 kfree(root->name);
1457
1458 root->name = kmalloc(len+1, GFP_KERNEL);
1459 if (!root->name)
1460 return -ENOMEM;
1461
1462 memcpy(root->name, name, len);
1463 root->name[len] ='\0';
1464
1465 return 0;
1466}
1467
1468static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1469 if (level == 0)
1470 return root->leafsize;
1471 return root->nodesize;
1472}
1473
1474/* helper function to cast into the data area of the leaf. */
1475#define btrfs_item_ptr(leaf, slot, type) \
1476 ((type *)(btrfs_leaf_data(leaf) + \
1477 btrfs_item_offset_nr(leaf, slot)))
1478
1479#define btrfs_item_ptr_offset(leaf, slot) \
1480 ((unsigned long)(btrfs_leaf_data(leaf) + \
1481 btrfs_item_offset_nr(leaf, slot)))
1482
1483static inline struct dentry *fdentry(struct file *file)
1484{
1485 return file->f_path.dentry;
1486}
1487
1488/* extent-tree.c */
1489int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1490int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
1491 struct btrfs_root *root, u64 bytenr,
1492 u64 num_bytes, u32 *refs);
1493int btrfs_update_pinned_extents(struct btrfs_root *root,
1494 u64 bytenr, u64 num, int pin);
1495int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1496 struct btrfs_root *root, struct extent_buffer *leaf);
1497int btrfs_cross_ref_exists(struct btrfs_trans_handle *trans,
1498 struct btrfs_root *root,
1499 struct btrfs_key *key, u64 bytenr);
1500int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1501 struct btrfs_root *root);
1502int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1503struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1504 btrfs_fs_info *info,
1505 u64 bytenr);
1506struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1507 struct btrfs_block_group_cache
1508 *hint, u64 search_start,
1509 int data, int owner);
1510struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1511 struct btrfs_root *root,
1512 u32 blocksize, u64 parent,
1513 u64 root_objectid,
1514 u64 ref_generation,
1515 int level,
1516 u64 hint,
1517 u64 empty_size);
1518struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1519 struct btrfs_root *root,
1520 u64 bytenr, u32 blocksize);
1521int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1522 struct btrfs_root *root,
1523 u64 num_bytes, u64 parent, u64 min_bytes,
1524 u64 root_objectid, u64 ref_generation,
1525 u64 owner, u64 empty_size, u64 hint_byte,
1526 u64 search_end, struct btrfs_key *ins, u64 data);
1527int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1528 struct btrfs_root *root, u64 parent,
1529 u64 root_objectid, u64 ref_generation,
1530 u64 owner, struct btrfs_key *ins);
1531int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1532 struct btrfs_root *root, u64 parent,
1533 u64 root_objectid, u64 ref_generation,
1534 u64 owner, struct btrfs_key *ins);
1535int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1536 struct btrfs_root *root,
1537 u64 num_bytes, u64 min_alloc_size,
1538 u64 empty_size, u64 hint_byte,
1539 u64 search_end, struct btrfs_key *ins,
1540 u64 data);
1541int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1542 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1543 u32 *nr_extents);
1544int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1545 struct extent_buffer *buf, u32 nr_extents);
1546int btrfs_update_ref(struct btrfs_trans_handle *trans,
1547 struct btrfs_root *root, struct extent_buffer *orig_buf,
1548 struct extent_buffer *buf, int start_slot, int nr);
1549int btrfs_free_extent(struct btrfs_trans_handle *trans,
1550 struct btrfs_root *root,
1551 u64 bytenr, u64 num_bytes, u64 parent,
1552 u64 root_objectid, u64 ref_generation,
1553 u64 owner_objectid, int pin);
1554int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1555int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1556 struct btrfs_root *root,
1557 struct extent_io_tree *unpin);
1558int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1559 struct btrfs_root *root,
1560 u64 bytenr, u64 num_bytes, u64 parent,
1561 u64 root_objectid, u64 ref_generation,
1562 u64 owner_objectid);
1563int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1564 struct btrfs_root *root, u64 bytenr,
1565 u64 orig_parent, u64 parent,
1566 u64 root_objectid, u64 ref_generation,
1567 u64 owner_objectid);
1568int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1569 struct btrfs_root *root);
1570int btrfs_free_block_groups(struct btrfs_fs_info *info);
1571int btrfs_read_block_groups(struct btrfs_root *root);
1572int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1573 struct btrfs_root *root, u64 bytes_used,
1574 u64 type, u64 chunk_objectid, u64 chunk_offset,
1575 u64 size);
1576int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1577 struct btrfs_root *root, u64 group_start);
1578int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1579int btrfs_free_reloc_root(struct btrfs_root *root);
1580int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1581int btrfs_add_reloc_mapping(struct btrfs_root *root, u64 orig_bytenr,
1582 u64 num_bytes, u64 new_bytenr);
1583int btrfs_get_reloc_mapping(struct btrfs_root *root, u64 orig_bytenr,
1584 u64 num_bytes, u64 *new_bytenr);
1585void btrfs_free_reloc_mappings(struct btrfs_root *root);
1586int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1587 struct btrfs_root *root,
1588 struct extent_buffer *buf, u64 orig_start);
1589int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1590int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1591/* ctree.c */
1592int btrfs_previous_item(struct btrfs_root *root,
1593 struct btrfs_path *path, u64 min_objectid,
1594 int type);
1595int btrfs_merge_path(struct btrfs_trans_handle *trans,
1596 struct btrfs_root *root,
1597 struct btrfs_key *node_keys,
1598 u64 *nodes, int lowest_level);
1599int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1600 struct btrfs_root *root, struct btrfs_path *path,
1601 struct btrfs_key *new_key);
1602struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1603struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1604int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1605 struct btrfs_key *key, int lowest_level,
1606 int cache_only, u64 min_trans);
1607int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1608 struct btrfs_key *max_key,
1609 struct btrfs_path *path, int cache_only,
1610 u64 min_trans);
1611int btrfs_cow_block(struct btrfs_trans_handle *trans,
1612 struct btrfs_root *root, struct extent_buffer *buf,
1613 struct extent_buffer *parent, int parent_slot,
1614 struct extent_buffer **cow_ret, u64 prealloc_dest);
1615int btrfs_copy_root(struct btrfs_trans_handle *trans,
1616 struct btrfs_root *root,
1617 struct extent_buffer *buf,
1618 struct extent_buffer **cow_ret, u64 new_root_objectid);
1619int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1620 *root, struct btrfs_path *path, u32 data_size);
1621int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1622 struct btrfs_root *root,
1623 struct btrfs_path *path,
1624 u32 new_size, int from_end);
1625int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1626 *root, struct btrfs_key *key, struct btrfs_path *p, int
1627 ins_len, int cow);
1628int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1629 struct btrfs_root *root, struct extent_buffer *parent,
1630 int start_slot, int cache_only, u64 *last_ret,
1631 struct btrfs_key *progress);
1632void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1633struct btrfs_path *btrfs_alloc_path(void);
1634void btrfs_free_path(struct btrfs_path *p);
1635void btrfs_init_path(struct btrfs_path *p);
1636int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1637 struct btrfs_path *path, int slot, int nr);
1638int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1639 struct btrfs_root *root,
1640 struct btrfs_path *path, u64 bytenr);
1641static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1642 struct btrfs_root *root,
1643 struct btrfs_path *path)
1644{
1645 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1646}
1647
1648int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1649 *root, struct btrfs_key *key, void *data, u32 data_size);
1650int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1651 struct btrfs_root *root,
1652 struct btrfs_path *path,
1653 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1654
1655static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1656 struct btrfs_root *root,
1657 struct btrfs_path *path,
1658 struct btrfs_key *key,
1659 u32 data_size)
1660{
1661 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1662}
1663
1664int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1665int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1666int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1667int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1668 *root);
1669/* root-item.c */
1670int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1671 struct btrfs_key *key);
1672int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1673 *root, struct btrfs_key *key, struct btrfs_root_item
1674 *item);
1675int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1676 *root, struct btrfs_key *key, struct btrfs_root_item
1677 *item);
1678int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1679 btrfs_root_item *item, struct btrfs_key *key);
1680int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1681 u64 *found_objectid);
1682int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1683 struct btrfs_root *latest_root);
1684/* dir-item.c */
1685int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1686 *root, const char *name, int name_len, u64 dir,
1687 struct btrfs_key *location, u8 type, u64 index);
1688struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1689 struct btrfs_root *root,
1690 struct btrfs_path *path, u64 dir,
1691 const char *name, int name_len,
1692 int mod);
1693struct btrfs_dir_item *
1694btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1695 struct btrfs_root *root,
1696 struct btrfs_path *path, u64 dir,
1697 u64 objectid, const char *name, int name_len,
1698 int mod);
1699struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1700 struct btrfs_path *path,
1701 const char *name, int name_len);
1702int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1703 struct btrfs_root *root,
1704 struct btrfs_path *path,
1705 struct btrfs_dir_item *di);
1706int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1707 struct btrfs_root *root, const char *name,
1708 u16 name_len, const void *data, u16 data_len,
1709 u64 dir);
1710struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1711 struct btrfs_root *root,
1712 struct btrfs_path *path, u64 dir,
1713 const char *name, u16 name_len,
1714 int mod);
1715
1716/* orphan.c */
1717int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1718 struct btrfs_root *root, u64 offset);
1719int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1720 struct btrfs_root *root, u64 offset);
1721
1722/* inode-map.c */
1723int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1724 struct btrfs_root *fs_root,
1725 u64 dirid, u64 *objectid);
1726int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1727
1728/* inode-item.c */
1729int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1730 struct btrfs_root *root,
1731 const char *name, int name_len,
1732 u64 inode_objectid, u64 ref_objectid, u64 index);
1733int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1734 struct btrfs_root *root,
1735 const char *name, int name_len,
1736 u64 inode_objectid, u64 ref_objectid, u64 *index);
1737int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1738 struct btrfs_root *root,
1739 struct btrfs_path *path, u64 objectid);
1740int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1741 *root, struct btrfs_path *path,
1742 struct btrfs_key *location, int mod);
1743
1744/* file-item.c */
1745int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1746 struct bio *bio);
1747int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1748 struct btrfs_root *root,
1749 u64 objectid, u64 pos, u64 disk_offset,
1750 u64 disk_num_bytes,
1751 u64 num_bytes, u64 offset);
1752int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1753 struct btrfs_root *root,
1754 struct btrfs_path *path, u64 objectid,
1755 u64 bytenr, int mod);
1756int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1757 struct btrfs_root *root, struct inode *inode,
1758 struct btrfs_ordered_sum *sums);
1759int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1760 struct bio *bio);
1761struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1762 struct btrfs_root *root,
1763 struct btrfs_path *path,
1764 u64 objectid, u64 offset,
1765 int cow);
1766int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1767 struct btrfs_root *root, struct btrfs_path *path,
1768 u64 isize);
1769/* inode.c */
1770
1771/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1772#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1773#define ClearPageChecked ClearPageFsMisc
1774#define SetPageChecked SetPageFsMisc
1775#define PageChecked PageFsMisc
1776#endif
1777
1778int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
1779 struct btrfs_root *root,
1780 struct inode *dir, struct inode *inode,
1781 const char *name, int name_len);
1782int btrfs_add_link(struct btrfs_trans_handle *trans,
1783 struct inode *parent_inode, struct inode *inode,
1784 const char *name, int name_len, int add_backref, u64 index);
1785int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
1786 struct btrfs_root *root,
1787 struct inode *inode, u64 new_size,
1788 u32 min_type);
1789
1790int btrfs_start_delalloc_inodes(struct btrfs_root *root);
1791int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1792int btrfs_writepages(struct address_space *mapping,
1793 struct writeback_control *wbc);
1794int btrfs_create_subvol_root(struct btrfs_root *new_root, struct dentry *dentry,
1795 struct btrfs_trans_handle *trans, u64 new_dirid,
1796 struct btrfs_block_group_cache *block_group);
1797
1798void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1799 int namelen);
1800
1801int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1802 size_t size, struct bio *bio);
1803
1804unsigned long btrfs_force_ra(struct address_space *mapping,
1805 struct file_ra_state *ra, struct file *file,
1806 pgoff_t offset, pgoff_t last_index);
1807int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1808 int for_del);
1809int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1810int btrfs_readpage(struct file *file, struct page *page);
1811void btrfs_delete_inode(struct inode *inode);
1812void btrfs_put_inode(struct inode *inode);
1813void btrfs_read_locked_inode(struct inode *inode);
1814int btrfs_write_inode(struct inode *inode, int wait);
1815void btrfs_dirty_inode(struct inode *inode);
1816struct inode *btrfs_alloc_inode(struct super_block *sb);
1817void btrfs_destroy_inode(struct inode *inode);
1818int btrfs_init_cachep(void);
1819void btrfs_destroy_cachep(void);
1820long btrfs_ioctl_trans_end(struct file *file);
1821struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1822 struct btrfs_root *root, int wait);
1823struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1824 struct btrfs_root *root);
1825struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
1826 struct btrfs_root *root, int *is_new);
1827int btrfs_commit_write(struct file *file, struct page *page,
1828 unsigned from, unsigned to);
1829struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1830 size_t page_offset, u64 start, u64 end,
1831 int create);
1832int btrfs_update_inode(struct btrfs_trans_handle *trans,
1833 struct btrfs_root *root,
1834 struct inode *inode);
1835int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
1836int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
1837void btrfs_orphan_cleanup(struct btrfs_root *root);
1838
1839/* ioctl.c */
1840long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1841
1842/* file.c */
1843int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
1844int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
1845 int skip_pinned);
1846int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1847extern struct file_operations btrfs_file_operations;
1848int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1849 struct btrfs_root *root, struct inode *inode,
1850 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1851int btrfs_release_file(struct inode *inode, struct file *file);
1852
1853/* tree-defrag.c */
1854int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1855 struct btrfs_root *root, int cache_only);
1856
1857/* sysfs.c */
1858int btrfs_init_sysfs(void);
1859void btrfs_exit_sysfs(void);
1860int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1861int btrfs_sysfs_add_root(struct btrfs_root *root);
1862void btrfs_sysfs_del_root(struct btrfs_root *root);
1863void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1864
1865/* xattr.c */
1866ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1867
1868/* super.c */
1869u64 btrfs_parse_size(char *str);
1870int btrfs_parse_options(struct btrfs_root *root, char *options);
1871int btrfs_sync_fs(struct super_block *sb, int wait);
1872
1873/* acl.c */
1874int btrfs_check_acl(struct inode *inode, int mask);
1875int btrfs_init_acl(struct inode *inode, struct inode *dir);
1876int btrfs_acl_chmod(struct inode *inode);
1877
1878/* free-space-cache.c */
1879int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
1880 u64 bytenr, u64 size);
1881int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
1882 u64 bytenr, u64 size);
1883void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
1884 *block_group);
1885struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
1886 *block_group, u64 offset,
1887 u64 bytes);
1888void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
1889 u64 bytes);
1890u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);
1891#endif
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-14 14:04:06 -0500