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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 "_BHRfS_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/* holds checksums of all the data extents */
77#define BTRFS_CSUM_TREE_OBJECTID 7ULL
78
79/* orhpan objectid for tracking unlinked/truncated files */
80#define BTRFS_ORPHAN_OBJECTID -5ULL
81
82/* does write ahead logging to speed up fsyncs */
83#define BTRFS_TREE_LOG_OBJECTID -6ULL
84#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
85
86/* for space balancing */
87#define BTRFS_TREE_RELOC_OBJECTID -8ULL
88#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
89
90/*
91 * extent checksums all have this objectid
92 * this allows them to share the logging tree
93 * for fsyncs
94 */
95#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
96
97/* dummy objectid represents multiple objectids */
98#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
99
100/*
101 * All files have objectids in this range.
102 */
103#define BTRFS_FIRST_FREE_OBJECTID 256ULL
104#define BTRFS_LAST_FREE_OBJECTID -256ULL
105#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
106
107
108/*
109 * the device items go into the chunk tree. The key is in the form
110 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
111 */
112#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
113
114/*
115 * we can actually store much bigger names, but lets not confuse the rest
116 * of linux
117 */
118#define BTRFS_NAME_LEN 255
119
120/* 32 bytes in various csum fields */
121#define BTRFS_CSUM_SIZE 32
122
123/* csum types */
124#define BTRFS_CSUM_TYPE_CRC32 0
125
126static int btrfs_csum_sizes[] = { 4, 0 };
127
128/* four bytes for CRC32 */
129#define BTRFS_EMPTY_DIR_SIZE 0
130
131#define BTRFS_FT_UNKNOWN 0
132#define BTRFS_FT_REG_FILE 1
133#define BTRFS_FT_DIR 2
134#define BTRFS_FT_CHRDEV 3
135#define BTRFS_FT_BLKDEV 4
136#define BTRFS_FT_FIFO 5
137#define BTRFS_FT_SOCK 6
138#define BTRFS_FT_SYMLINK 7
139#define BTRFS_FT_XATTR 8
140#define BTRFS_FT_MAX 9
141
142/*
143 * the key defines the order in the tree, and so it also defines (optimal)
144 * block layout. objectid corresonds to the inode number. The flags
145 * tells us things about the object, and is a kind of stream selector.
146 * so for a given inode, keys with flags of 1 might refer to the inode
147 * data, flags of 2 may point to file data in the btree and flags == 3
148 * may point to extents.
149 *
150 * offset is the starting byte offset for this key in the stream.
151 *
152 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
153 * in cpu native order. Otherwise they are identical and their sizes
154 * should be the same (ie both packed)
155 */
156struct btrfs_disk_key {
157 __le64 objectid;
158 u8 type;
159 __le64 offset;
160} __attribute__ ((__packed__));
161
162struct btrfs_key {
163 u64 objectid;
164 u8 type;
165 u64 offset;
166} __attribute__ ((__packed__));
167
168struct btrfs_mapping_tree {
169 struct extent_map_tree map_tree;
170};
171
172#define BTRFS_UUID_SIZE 16
173struct btrfs_dev_item {
174 /* the internal btrfs device id */
175 __le64 devid;
176
177 /* size of the device */
178 __le64 total_bytes;
179
180 /* bytes used */
181 __le64 bytes_used;
182
183 /* optimal io alignment for this device */
184 __le32 io_align;
185
186 /* optimal io width for this device */
187 __le32 io_width;
188
189 /* minimal io size for this device */
190 __le32 sector_size;
191
192 /* type and info about this device */
193 __le64 type;
194
195 /* expected generation for this device */
196 __le64 generation;
197
198 /*
199 * starting byte of this partition on the device,
200 * to allowr for stripe alignment in the future
201 */
202 __le64 start_offset;
203
204 /* grouping information for allocation decisions */
205 __le32 dev_group;
206
207 /* seek speed 0-100 where 100 is fastest */
208 u8 seek_speed;
209
210 /* bandwidth 0-100 where 100 is fastest */
211 u8 bandwidth;
212
213 /* btrfs generated uuid for this device */
214 u8 uuid[BTRFS_UUID_SIZE];
215
216 /* uuid of FS who owns this device */
217 u8 fsid[BTRFS_UUID_SIZE];
218} __attribute__ ((__packed__));
219
220struct btrfs_stripe {
221 __le64 devid;
222 __le64 offset;
223 u8 dev_uuid[BTRFS_UUID_SIZE];
224} __attribute__ ((__packed__));
225
226struct btrfs_chunk {
227 /* size of this chunk in bytes */
228 __le64 length;
229
230 /* objectid of the root referencing this chunk */
231 __le64 owner;
232
233 __le64 stripe_len;
234 __le64 type;
235
236 /* optimal io alignment for this chunk */
237 __le32 io_align;
238
239 /* optimal io width for this chunk */
240 __le32 io_width;
241
242 /* minimal io size for this chunk */
243 __le32 sector_size;
244
245 /* 2^16 stripes is quite a lot, a second limit is the size of a single
246 * item in the btree
247 */
248 __le16 num_stripes;
249
250 /* sub stripes only matter for raid10 */
251 __le16 sub_stripes;
252 struct btrfs_stripe stripe;
253 /* additional stripes go here */
254} __attribute__ ((__packed__));
255
256static inline unsigned long btrfs_chunk_item_size(int num_stripes)
257{
258 BUG_ON(num_stripes == 0);
259 return sizeof(struct btrfs_chunk) +
260 sizeof(struct btrfs_stripe) * (num_stripes - 1);
261}
262
263#define BTRFS_FSID_SIZE 16
264#define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
265
266/*
267 * every tree block (leaf or node) starts with this header.
268 */
269struct btrfs_header {
270 /* these first four must match the super block */
271 u8 csum[BTRFS_CSUM_SIZE];
272 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
273 __le64 bytenr; /* which block this node is supposed to live in */
274 __le64 flags;
275
276 /* allowed to be different from the super from here on down */
277 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
278 __le64 generation;
279 __le64 owner;
280 __le32 nritems;
281 u8 level;
282} __attribute__ ((__packed__));
283
284#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
285 sizeof(struct btrfs_header)) / \
286 sizeof(struct btrfs_key_ptr))
287#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
288#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
289#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
290 sizeof(struct btrfs_item) - \
291 sizeof(struct btrfs_file_extent_item))
292
293#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
294
295/*
296 * this is a very generous portion of the super block, giving us
297 * room to translate 14 chunks with 3 stripes each.
298 */
299#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
300#define BTRFS_LABEL_SIZE 256
301
302/*
303 * the super block basically lists the main trees of the FS
304 * it currently lacks any block count etc etc
305 */
306struct btrfs_super_block {
307 u8 csum[BTRFS_CSUM_SIZE];
308 /* the first 4 fields must match struct btrfs_header */
309 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
310 __le64 bytenr; /* this block number */
311 __le64 flags;
312
313 /* allowed to be different from the btrfs_header from here own down */
314 __le64 magic;
315 __le64 generation;
316 __le64 root;
317 __le64 chunk_root;
318 __le64 log_root;
319
320 /* this will help find the new super based on the log root */
321 __le64 log_root_transid;
322 __le64 total_bytes;
323 __le64 bytes_used;
324 __le64 root_dir_objectid;
325 __le64 num_devices;
326 __le32 sectorsize;
327 __le32 nodesize;
328 __le32 leafsize;
329 __le32 stripesize;
330 __le32 sys_chunk_array_size;
331 __le64 chunk_root_generation;
332 __le64 compat_flags;
333 __le64 compat_ro_flags;
334 __le64 incompat_flags;
335 __le16 csum_type;
336 u8 root_level;
337 u8 chunk_root_level;
338 u8 log_root_level;
339 struct btrfs_dev_item dev_item;
340
341 char label[BTRFS_LABEL_SIZE];
342
343 /* future expansion */
344 __le64 reserved[32];
345 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
346} __attribute__ ((__packed__));
347
348/*
349 * Compat flags that we support. If any incompat flags are set other than the
350 * ones specified below then we will fail to mount
351 */
352#define BTRFS_FEATURE_COMPAT_SUPP 0x0
353#define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
354#define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
355
356/*
357 * A leaf is full of items. offset and size tell us where to find
358 * the item in the leaf (relative to the start of the data area)
359 */
360struct btrfs_item {
361 struct btrfs_disk_key key;
362 __le32 offset;
363 __le32 size;
364} __attribute__ ((__packed__));
365
366/*
367 * leaves have an item area and a data area:
368 * [item0, item1....itemN] [free space] [dataN...data1, data0]
369 *
370 * The data is separate from the items to get the keys closer together
371 * during searches.
372 */
373struct btrfs_leaf {
374 struct btrfs_header header;
375 struct btrfs_item items[];
376} __attribute__ ((__packed__));
377
378/*
379 * all non-leaf blocks are nodes, they hold only keys and pointers to
380 * other blocks
381 */
382struct btrfs_key_ptr {
383 struct btrfs_disk_key key;
384 __le64 blockptr;
385 __le64 generation;
386} __attribute__ ((__packed__));
387
388struct btrfs_node {
389 struct btrfs_header header;
390 struct btrfs_key_ptr ptrs[];
391} __attribute__ ((__packed__));
392
393/*
394 * btrfs_paths remember the path taken from the root down to the leaf.
395 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
396 * to any other levels that are present.
397 *
398 * The slots array records the index of the item or block pointer
399 * used while walking the tree.
400 */
401struct btrfs_path {
402 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
403 int slots[BTRFS_MAX_LEVEL];
404 /* if there is real range locking, this locks field will change */
405 int locks[BTRFS_MAX_LEVEL];
406 int reada;
407 /* keep some upper locks as we walk down */
408 int keep_locks;
409 int skip_locking;
410 int lowest_level;
411
412 /*
413 * set by btrfs_split_item, tells search_slot to keep all locks
414 * and to force calls to keep space in the nodes
415 */
416 int search_for_split;
417};
418
419/*
420 * items in the extent btree are used to record the objectid of the
421 * owner of the block and the number of references
422 */
423struct btrfs_extent_item {
424 __le32 refs;
425} __attribute__ ((__packed__));
426
427struct btrfs_extent_ref {
428 __le64 root;
429 __le64 generation;
430 __le64 objectid;
431 __le32 num_refs;
432} __attribute__ ((__packed__));
433
434/* dev extents record free space on individual devices. The owner
435 * field points back to the chunk allocation mapping tree that allocated
436 * the extent. The chunk tree uuid field is a way to double check the owner
437 */
438struct btrfs_dev_extent {
439 __le64 chunk_tree;
440 __le64 chunk_objectid;
441 __le64 chunk_offset;
442 __le64 length;
443 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
444} __attribute__ ((__packed__));
445
446struct btrfs_inode_ref {
447 __le64 index;
448 __le16 name_len;
449 /* name goes here */
450} __attribute__ ((__packed__));
451
452struct btrfs_timespec {
453 __le64 sec;
454 __le32 nsec;
455} __attribute__ ((__packed__));
456
457typedef enum {
458 BTRFS_COMPRESS_NONE = 0,
459 BTRFS_COMPRESS_ZLIB = 1,
460 BTRFS_COMPRESS_LAST = 2,
461} btrfs_compression_type;
462
463/* we don't understand any encryption methods right now */
464typedef enum {
465 BTRFS_ENCRYPTION_NONE = 0,
466 BTRFS_ENCRYPTION_LAST = 1,
467} btrfs_encryption_type;
468
469struct btrfs_inode_item {
470 /* nfs style generation number */
471 __le64 generation;
472 /* transid that last touched this inode */
473 __le64 transid;
474 __le64 size;
475 __le64 nbytes;
476 __le64 block_group;
477 __le32 nlink;
478 __le32 uid;
479 __le32 gid;
480 __le32 mode;
481 __le64 rdev;
482 __le64 flags;
483
484 /* modification sequence number for NFS */
485 __le64 sequence;
486
487 /*
488 * a little future expansion, for more than this we can
489 * just grow the inode item and version it
490 */
491 __le64 reserved[4];
492 struct btrfs_timespec atime;
493 struct btrfs_timespec ctime;
494 struct btrfs_timespec mtime;
495 struct btrfs_timespec otime;
496} __attribute__ ((__packed__));
497
498struct btrfs_dir_log_item {
499 __le64 end;
500} __attribute__ ((__packed__));
501
502struct btrfs_dir_item {
503 struct btrfs_disk_key location;
504 __le64 transid;
505 __le16 data_len;
506 __le16 name_len;
507 u8 type;
508} __attribute__ ((__packed__));
509
510struct btrfs_root_item {
511 struct btrfs_inode_item inode;
512 __le64 generation;
513 __le64 root_dirid;
514 __le64 bytenr;
515 __le64 byte_limit;
516 __le64 bytes_used;
517 __le64 last_snapshot;
518 __le64 flags;
519 __le32 refs;
520 struct btrfs_disk_key drop_progress;
521 u8 drop_level;
522 u8 level;
523} __attribute__ ((__packed__));
524
525/*
526 * this is used for both forward and backward root refs
527 */
528struct btrfs_root_ref {
529 __le64 dirid;
530 __le64 sequence;
531 __le16 name_len;
532} __attribute__ ((__packed__));
533
534#define BTRFS_FILE_EXTENT_INLINE 0
535#define BTRFS_FILE_EXTENT_REG 1
536#define BTRFS_FILE_EXTENT_PREALLOC 2
537
538struct btrfs_file_extent_item {
539 /*
540 * transaction id that created this extent
541 */
542 __le64 generation;
543 /*
544 * max number of bytes to hold this extent in ram
545 * when we split a compressed extent we can't know how big
546 * each of the resulting pieces will be. So, this is
547 * an upper limit on the size of the extent in ram instead of
548 * an exact limit.
549 */
550 __le64 ram_bytes;
551
552 /*
553 * 32 bits for the various ways we might encode the data,
554 * including compression and encryption. If any of these
555 * are set to something a given disk format doesn't understand
556 * it is treated like an incompat flag for reading and writing,
557 * but not for stat.
558 */
559 u8 compression;
560 u8 encryption;
561 __le16 other_encoding; /* spare for later use */
562
563 /* are we inline data or a real extent? */
564 u8 type;
565
566 /*
567 * disk space consumed by the extent, checksum blocks are included
568 * in these numbers
569 */
570 __le64 disk_bytenr;
571 __le64 disk_num_bytes;
572 /*
573 * the logical offset in file blocks (no csums)
574 * this extent record is for. This allows a file extent to point
575 * into the middle of an existing extent on disk, sharing it
576 * between two snapshots (useful if some bytes in the middle of the
577 * extent have changed
578 */
579 __le64 offset;
580 /*
581 * the logical number of file blocks (no csums included). This
582 * always reflects the size uncompressed and without encoding.
583 */
584 __le64 num_bytes;
585
586} __attribute__ ((__packed__));
587
588struct btrfs_csum_item {
589 u8 csum;
590} __attribute__ ((__packed__));
591
592/* different types of block groups (and chunks) */
593#define BTRFS_BLOCK_GROUP_DATA (1 << 0)
594#define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
595#define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
596#define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
597#define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
598#define BTRFS_BLOCK_GROUP_DUP (1 << 5)
599#define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
600
601struct btrfs_block_group_item {
602 __le64 used;
603 __le64 chunk_objectid;
604 __le64 flags;
605} __attribute__ ((__packed__));
606
607struct btrfs_space_info {
608 u64 flags;
609 u64 total_bytes;
610 u64 bytes_used;
611 u64 bytes_pinned;
612 u64 bytes_reserved;
613 u64 bytes_readonly;
614 int full;
615 int force_alloc;
616 struct list_head list;
617
618 /* for block groups in our same type */
619 struct list_head block_groups;
620 spinlock_t lock;
621 struct rw_semaphore groups_sem;
622};
623
624struct btrfs_free_space {
625 struct rb_node bytes_index;
626 struct rb_node offset_index;
627 u64 offset;
628 u64 bytes;
629};
630
631struct btrfs_block_group_cache {
632 struct btrfs_key key;
633 struct btrfs_block_group_item item;
634 spinlock_t lock;
635 struct mutex alloc_mutex;
636 struct mutex cache_mutex;
637 u64 pinned;
638 u64 reserved;
639 u64 flags;
640 int cached;
641 int ro;
642 int dirty;
643
644 struct btrfs_space_info *space_info;
645
646 /* free space cache stuff */
647 struct rb_root free_space_bytes;
648 struct rb_root free_space_offset;
649
650 /* block group cache stuff */
651 struct rb_node cache_node;
652
653 /* for block groups in the same raid type */
654 struct list_head list;
655
656 /* usage count */
657 atomic_t count;
658};
659
660struct btrfs_leaf_ref_tree {
661 struct rb_root root;
662 struct list_head list;
663 spinlock_t lock;
664};
665
666struct btrfs_device;
667struct btrfs_fs_devices;
668struct btrfs_fs_info {
669 u8 fsid[BTRFS_FSID_SIZE];
670 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
671 struct btrfs_root *extent_root;
672 struct btrfs_root *tree_root;
673 struct btrfs_root *chunk_root;
674 struct btrfs_root *dev_root;
675 struct btrfs_root *fs_root;
676 struct btrfs_root *csum_root;
677
678 /* the log root tree is a directory of all the other log roots */
679 struct btrfs_root *log_root_tree;
680 struct radix_tree_root fs_roots_radix;
681
682 /* block group cache stuff */
683 spinlock_t block_group_cache_lock;
684 struct rb_root block_group_cache_tree;
685
686 struct extent_io_tree pinned_extents;
687 struct extent_io_tree pending_del;
688 struct extent_io_tree extent_ins;
689
690 /* logical->physical extent mapping */
691 struct btrfs_mapping_tree mapping_tree;
692
693 u64 generation;
694 u64 last_trans_committed;
695 u64 last_trans_new_blockgroup;
696 u64 open_ioctl_trans;
697 unsigned long mount_opt;
698 u64 max_extent;
699 u64 max_inline;
700 u64 alloc_start;
701 struct btrfs_transaction *running_transaction;
702 wait_queue_head_t transaction_throttle;
703 wait_queue_head_t transaction_wait;
704
705 wait_queue_head_t async_submit_wait;
706 wait_queue_head_t tree_log_wait;
707
708 struct btrfs_super_block super_copy;
709 struct btrfs_super_block super_for_commit;
710 struct block_device *__bdev;
711 struct super_block *sb;
712 struct inode *btree_inode;
713 struct backing_dev_info bdi;
714 spinlock_t hash_lock;
715 struct mutex trans_mutex;
716 struct mutex tree_log_mutex;
717 struct mutex transaction_kthread_mutex;
718 struct mutex cleaner_mutex;
719 struct mutex extent_ins_mutex;
720 struct mutex pinned_mutex;
721 struct mutex chunk_mutex;
722 struct mutex drop_mutex;
723 struct mutex volume_mutex;
724 struct mutex tree_reloc_mutex;
725 struct list_head trans_list;
726 struct list_head hashers;
727 struct list_head dead_roots;
728
729 atomic_t nr_async_submits;
730 atomic_t async_submit_draining;
731 atomic_t nr_async_bios;
732 atomic_t async_delalloc_pages;
733 atomic_t tree_log_writers;
734 atomic_t tree_log_commit;
735 unsigned long tree_log_batch;
736 u64 tree_log_transid;
737
738 /*
739 * this is used by the balancing code to wait for all the pending
740 * ordered extents
741 */
742 spinlock_t ordered_extent_lock;
743 struct list_head ordered_extents;
744 struct list_head delalloc_inodes;
745
746 /*
747 * there is a pool of worker threads for checksumming during writes
748 * and a pool for checksumming after reads. This is because readers
749 * can run with FS locks held, and the writers may be waiting for
750 * those locks. We don't want ordering in the pending list to cause
751 * deadlocks, and so the two are serviced separately.
752 *
753 * A third pool does submit_bio to avoid deadlocking with the other
754 * two
755 */
756 struct btrfs_workers workers;
757 struct btrfs_workers delalloc_workers;
758 struct btrfs_workers endio_workers;
759 struct btrfs_workers endio_meta_workers;
760 struct btrfs_workers endio_meta_write_workers;
761 struct btrfs_workers endio_write_workers;
762 struct btrfs_workers submit_workers;
763 /*
764 * fixup workers take dirty pages that didn't properly go through
765 * the cow mechanism and make them safe to write. It happens
766 * for the sys_munmap function call path
767 */
768 struct btrfs_workers fixup_workers;
769 struct task_struct *transaction_kthread;
770 struct task_struct *cleaner_kthread;
771 int thread_pool_size;
772
773 /* tree relocation relocated fields */
774 struct list_head dead_reloc_roots;
775 struct btrfs_leaf_ref_tree reloc_ref_tree;
776 struct btrfs_leaf_ref_tree shared_ref_tree;
777
778 struct kobject super_kobj;
779 struct completion kobj_unregister;
780 int do_barriers;
781 int closing;
782 int log_root_recovering;
783 atomic_t throttles;
784 atomic_t throttle_gen;
785
786 u64 total_pinned;
787 struct list_head dirty_cowonly_roots;
788
789 struct btrfs_fs_devices *fs_devices;
790 struct list_head space_info;
791 spinlock_t delalloc_lock;
792 spinlock_t new_trans_lock;
793 u64 delalloc_bytes;
794 u64 last_alloc;
795 u64 last_data_alloc;
796
797 spinlock_t ref_cache_lock;
798 u64 total_ref_cache_size;
799
800 u64 avail_data_alloc_bits;
801 u64 avail_metadata_alloc_bits;
802 u64 avail_system_alloc_bits;
803 u64 data_alloc_profile;
804 u64 metadata_alloc_profile;
805 u64 system_alloc_profile;
806
807 void *bdev_holder;
808};
809
810/*
811 * in ram representation of the tree. extent_root is used for all allocations
812 * and for the extent tree extent_root root.
813 */
814struct btrfs_dirty_root;
815struct btrfs_root {
816 struct extent_buffer *node;
817
818 /* the node lock is held while changing the node pointer */
819 spinlock_t node_lock;
820
821 struct extent_buffer *commit_root;
822 struct btrfs_leaf_ref_tree *ref_tree;
823 struct btrfs_leaf_ref_tree ref_tree_struct;
824 struct btrfs_dirty_root *dirty_root;
825 struct btrfs_root *log_root;
826 struct btrfs_root *reloc_root;
827
828 struct btrfs_root_item root_item;
829 struct btrfs_key root_key;
830 struct btrfs_fs_info *fs_info;
831 struct extent_io_tree dirty_log_pages;
832
833 struct kobject root_kobj;
834 struct completion kobj_unregister;
835 struct mutex objectid_mutex;
836 struct mutex log_mutex;
837
838 u64 objectid;
839 u64 last_trans;
840
841 /* data allocations are done in sectorsize units */
842 u32 sectorsize;
843
844 /* node allocations are done in nodesize units */
845 u32 nodesize;
846
847 /* leaf allocations are done in leafsize units */
848 u32 leafsize;
849
850 u32 stripesize;
851
852 u32 type;
853 u64 highest_inode;
854 u64 last_inode_alloc;
855 int ref_cows;
856 int track_dirty;
857 u64 defrag_trans_start;
858 struct btrfs_key defrag_progress;
859 struct btrfs_key defrag_max;
860 int defrag_running;
861 int defrag_level;
862 char *name;
863 int in_sysfs;
864
865 /* the dirty list is only used by non-reference counted roots */
866 struct list_head dirty_list;
867
868 spinlock_t list_lock;
869 struct list_head dead_list;
870 struct list_head orphan_list;
871
872 /*
873 * right now this just gets used so that a root has its own devid
874 * for stat. It may be used for more later
875 */
876 struct super_block anon_super;
877};
878
879/*
880
881 * inode items have the data typically returned from stat and store other
882 * info about object characteristics. There is one for every file and dir in
883 * the FS
884 */
885#define BTRFS_INODE_ITEM_KEY 1
886#define BTRFS_INODE_REF_KEY 12
887#define BTRFS_XATTR_ITEM_KEY 24
888#define BTRFS_ORPHAN_ITEM_KEY 48
889/* reserve 2-15 close to the inode for later flexibility */
890
891/*
892 * dir items are the name -> inode pointers in a directory. There is one
893 * for every name in a directory.
894 */
895#define BTRFS_DIR_LOG_ITEM_KEY 60
896#define BTRFS_DIR_LOG_INDEX_KEY 72
897#define BTRFS_DIR_ITEM_KEY 84
898#define BTRFS_DIR_INDEX_KEY 96
899/*
900 * extent data is for file data
901 */
902#define BTRFS_EXTENT_DATA_KEY 108
903
904/*
905 * extent csums are stored in a separate tree and hold csums for
906 * an entire extent on disk.
907 */
908#define BTRFS_EXTENT_CSUM_KEY 128
909
910/*
911 * root items point to tree roots. There are typically in the root
912 * tree used by the super block to find all the other trees
913 */
914#define BTRFS_ROOT_ITEM_KEY 132
915
916/*
917 * root backrefs tie subvols and snapshots to the directory entries that
918 * reference them
919 */
920#define BTRFS_ROOT_BACKREF_KEY 144
921
922/*
923 * root refs make a fast index for listing all of the snapshots and
924 * subvolumes referenced by a given root. They point directly to the
925 * directory item in the root that references the subvol
926 */
927#define BTRFS_ROOT_REF_KEY 156
928
929/*
930 * extent items are in the extent map tree. These record which blocks
931 * are used, and how many references there are to each block
932 */
933#define BTRFS_EXTENT_ITEM_KEY 168
934#define BTRFS_EXTENT_REF_KEY 180
935
936/*
937 * block groups give us hints into the extent allocation trees. Which
938 * blocks are free etc etc
939 */
940#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
941
942#define BTRFS_DEV_EXTENT_KEY 204
943#define BTRFS_DEV_ITEM_KEY 216
944#define BTRFS_CHUNK_ITEM_KEY 228
945
946/*
947 * string items are for debugging. They just store a short string of
948 * data in the FS
949 */
950#define BTRFS_STRING_ITEM_KEY 253
951
952#define BTRFS_MOUNT_NODATASUM (1 << 0)
953#define BTRFS_MOUNT_NODATACOW (1 << 1)
954#define BTRFS_MOUNT_NOBARRIER (1 << 2)
955#define BTRFS_MOUNT_SSD (1 << 3)
956#define BTRFS_MOUNT_DEGRADED (1 << 4)
957#define BTRFS_MOUNT_COMPRESS (1 << 5)
958
959#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
960#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
961#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
962 BTRFS_MOUNT_##opt)
963/*
964 * Inode flags
965 */
966#define BTRFS_INODE_NODATASUM (1 << 0)
967#define BTRFS_INODE_NODATACOW (1 << 1)
968#define BTRFS_INODE_READONLY (1 << 2)
969#define BTRFS_INODE_NOCOMPRESS (1 << 3)
970#define BTRFS_INODE_PREALLOC (1 << 4)
971#define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
972 ~BTRFS_INODE_##flag)
973#define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
974 BTRFS_INODE_##flag)
975#define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
976 BTRFS_INODE_##flag)
977/* some macros to generate set/get funcs for the struct fields. This
978 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
979 * one for u8:
980 */
981#define le8_to_cpu(v) (v)
982#define cpu_to_le8(v) (v)
983#define __le8 u8
984
985#define read_eb_member(eb, ptr, type, member, result) ( \
986 read_extent_buffer(eb, (char *)(result), \
987 ((unsigned long)(ptr)) + \
988 offsetof(type, member), \
989 sizeof(((type *)0)->member)))
990
991#define write_eb_member(eb, ptr, type, member, result) ( \
992 write_extent_buffer(eb, (char *)(result), \
993 ((unsigned long)(ptr)) + \
994 offsetof(type, member), \
995 sizeof(((type *)0)->member)))
996
997#ifndef BTRFS_SETGET_FUNCS
998#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
999u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1000void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1001#endif
1002
1003#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1004static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1005{ \
1006 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1007 u##bits res = le##bits##_to_cpu(p->member); \
1008 kunmap_atomic(p, KM_USER0); \
1009 return res; \
1010} \
1011static inline void btrfs_set_##name(struct extent_buffer *eb, \
1012 u##bits val) \
1013{ \
1014 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1015 p->member = cpu_to_le##bits(val); \
1016 kunmap_atomic(p, KM_USER0); \
1017}
1018
1019#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1020static inline u##bits btrfs_##name(type *s) \
1021{ \
1022 return le##bits##_to_cpu(s->member); \
1023} \
1024static inline void btrfs_set_##name(type *s, u##bits val) \
1025{ \
1026 s->member = cpu_to_le##bits(val); \
1027}
1028
1029BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1030BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1031BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1032BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1033BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1034BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1035 start_offset, 64);
1036BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1037BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1038BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1039BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1040BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1041BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1042
1043BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1044BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1045 total_bytes, 64);
1046BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1047 bytes_used, 64);
1048BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1049 io_align, 32);
1050BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1051 io_width, 32);
1052BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1053 sector_size, 32);
1054BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1055BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1056 dev_group, 32);
1057BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1058 seek_speed, 8);
1059BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1060 bandwidth, 8);
1061BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1062 generation, 64);
1063
1064static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1065{
1066 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1067}
1068
1069static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1070{
1071 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1072}
1073
1074BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1075BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1076BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1077BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1078BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1079BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1080BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1081BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1082BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1083BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1084BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1085
1086static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1087{
1088 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1089}
1090
1091BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1092BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1093BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1094 stripe_len, 64);
1095BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1096 io_align, 32);
1097BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1098 io_width, 32);
1099BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1100 sector_size, 32);
1101BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1102BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1103 num_stripes, 16);
1104BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1105 sub_stripes, 16);
1106BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1107BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1108
1109static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1110 int nr)
1111{
1112 unsigned long offset = (unsigned long)c;
1113 offset += offsetof(struct btrfs_chunk, stripe);
1114 offset += nr * sizeof(struct btrfs_stripe);
1115 return (struct btrfs_stripe *)offset;
1116}
1117
1118static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1119{
1120 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1121}
1122
1123static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1124 struct btrfs_chunk *c, int nr)
1125{
1126 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1127}
1128
1129static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1130 struct btrfs_chunk *c, int nr,
1131 u64 val)
1132{
1133 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1134}
1135
1136static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1137 struct btrfs_chunk *c, int nr)
1138{
1139 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1140}
1141
1142static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1143 struct btrfs_chunk *c, int nr,
1144 u64 val)
1145{
1146 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1147}
1148
1149/* struct btrfs_block_group_item */
1150BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1151 used, 64);
1152BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1153 used, 64);
1154BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1155 struct btrfs_block_group_item, chunk_objectid, 64);
1156
1157BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1158 struct btrfs_block_group_item, chunk_objectid, 64);
1159BTRFS_SETGET_FUNCS(disk_block_group_flags,
1160 struct btrfs_block_group_item, flags, 64);
1161BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1162 struct btrfs_block_group_item, flags, 64);
1163
1164/* struct btrfs_inode_ref */
1165BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1166BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1167
1168/* struct btrfs_inode_item */
1169BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1170BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1171BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1172BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1173BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1174BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1175BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1176BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1177BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1178BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1179BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1180BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1181
1182static inline struct btrfs_timespec *
1183btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1184{
1185 unsigned long ptr = (unsigned long)inode_item;
1186 ptr += offsetof(struct btrfs_inode_item, atime);
1187 return (struct btrfs_timespec *)ptr;
1188}
1189
1190static inline struct btrfs_timespec *
1191btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1192{
1193 unsigned long ptr = (unsigned long)inode_item;
1194 ptr += offsetof(struct btrfs_inode_item, mtime);
1195 return (struct btrfs_timespec *)ptr;
1196}
1197
1198static inline struct btrfs_timespec *
1199btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1200{
1201 unsigned long ptr = (unsigned long)inode_item;
1202 ptr += offsetof(struct btrfs_inode_item, ctime);
1203 return (struct btrfs_timespec *)ptr;
1204}
1205
1206static inline struct btrfs_timespec *
1207btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1208{
1209 unsigned long ptr = (unsigned long)inode_item;
1210 ptr += offsetof(struct btrfs_inode_item, otime);
1211 return (struct btrfs_timespec *)ptr;
1212}
1213
1214BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1215BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1216
1217/* struct btrfs_dev_extent */
1218BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1219 chunk_tree, 64);
1220BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1221 chunk_objectid, 64);
1222BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1223 chunk_offset, 64);
1224BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1225
1226static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1227{
1228 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1229 return (u8 *)((unsigned long)dev + ptr);
1230}
1231
1232/* struct btrfs_extent_ref */
1233BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1234BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1235BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1236BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1237
1238BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1239BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1240 generation, 64);
1241BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1242 objectid, 64);
1243BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1244 num_refs, 32);
1245
1246/* struct btrfs_extent_item */
1247BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1248BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1249 refs, 32);
1250
1251/* struct btrfs_node */
1252BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1253BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1254
1255static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1256{
1257 unsigned long ptr;
1258 ptr = offsetof(struct btrfs_node, ptrs) +
1259 sizeof(struct btrfs_key_ptr) * nr;
1260 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1261}
1262
1263static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1264 int nr, u64 val)
1265{
1266 unsigned long ptr;
1267 ptr = offsetof(struct btrfs_node, ptrs) +
1268 sizeof(struct btrfs_key_ptr) * nr;
1269 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1270}
1271
1272static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1273{
1274 unsigned long ptr;
1275 ptr = offsetof(struct btrfs_node, ptrs) +
1276 sizeof(struct btrfs_key_ptr) * nr;
1277 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1278}
1279
1280static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1281 int nr, u64 val)
1282{
1283 unsigned long ptr;
1284 ptr = offsetof(struct btrfs_node, ptrs) +
1285 sizeof(struct btrfs_key_ptr) * nr;
1286 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1287}
1288
1289static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1290{
1291 return offsetof(struct btrfs_node, ptrs) +
1292 sizeof(struct btrfs_key_ptr) * nr;
1293}
1294
1295void btrfs_node_key(struct extent_buffer *eb,
1296 struct btrfs_disk_key *disk_key, int nr);
1297
1298static inline void btrfs_set_node_key(struct extent_buffer *eb,
1299 struct btrfs_disk_key *disk_key, int nr)
1300{
1301 unsigned long ptr;
1302 ptr = btrfs_node_key_ptr_offset(nr);
1303 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1304 struct btrfs_key_ptr, key, disk_key);
1305}
1306
1307/* struct btrfs_item */
1308BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1309BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1310
1311static inline unsigned long btrfs_item_nr_offset(int nr)
1312{
1313 return offsetof(struct btrfs_leaf, items) +
1314 sizeof(struct btrfs_item) * nr;
1315}
1316
1317static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1318 int nr)
1319{
1320 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1321}
1322
1323static inline u32 btrfs_item_end(struct extent_buffer *eb,
1324 struct btrfs_item *item)
1325{
1326 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1327}
1328
1329static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1330{
1331 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1332}
1333
1334static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1335{
1336 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1337}
1338
1339static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1340{
1341 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1342}
1343
1344static inline void btrfs_item_key(struct extent_buffer *eb,
1345 struct btrfs_disk_key *disk_key, int nr)
1346{
1347 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1348 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1349}
1350
1351static inline void btrfs_set_item_key(struct extent_buffer *eb,
1352 struct btrfs_disk_key *disk_key, int nr)
1353{
1354 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1355 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1356}
1357
1358BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1359
1360/*
1361 * struct btrfs_root_ref
1362 */
1363BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1364BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1365BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1366
1367/* struct btrfs_dir_item */
1368BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1369BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1370BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1371BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1372
1373static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1374 struct btrfs_dir_item *item,
1375 struct btrfs_disk_key *key)
1376{
1377 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1378}
1379
1380static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1381 struct btrfs_dir_item *item,
1382 struct btrfs_disk_key *key)
1383{
1384 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1385}
1386
1387/* struct btrfs_disk_key */
1388BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1389 objectid, 64);
1390BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1391BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1392
1393static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1394 struct btrfs_disk_key *disk)
1395{
1396 cpu->offset = le64_to_cpu(disk->offset);
1397 cpu->type = disk->type;
1398 cpu->objectid = le64_to_cpu(disk->objectid);
1399}
1400
1401static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1402 struct btrfs_key *cpu)
1403{
1404 disk->offset = cpu_to_le64(cpu->offset);
1405 disk->type = cpu->type;
1406 disk->objectid = cpu_to_le64(cpu->objectid);
1407}
1408
1409static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1410 struct btrfs_key *key, int nr)
1411{
1412 struct btrfs_disk_key disk_key;
1413 btrfs_node_key(eb, &disk_key, nr);
1414 btrfs_disk_key_to_cpu(key, &disk_key);
1415}
1416
1417static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1418 struct btrfs_key *key, int nr)
1419{
1420 struct btrfs_disk_key disk_key;
1421 btrfs_item_key(eb, &disk_key, nr);
1422 btrfs_disk_key_to_cpu(key, &disk_key);
1423}
1424
1425static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1426 struct btrfs_dir_item *item,
1427 struct btrfs_key *key)
1428{
1429 struct btrfs_disk_key disk_key;
1430 btrfs_dir_item_key(eb, item, &disk_key);
1431 btrfs_disk_key_to_cpu(key, &disk_key);
1432}
1433
1434
1435static inline u8 btrfs_key_type(struct btrfs_key *key)
1436{
1437 return key->type;
1438}
1439
1440static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1441{
1442 key->type = val;
1443}
1444
1445/* struct btrfs_header */
1446BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1447BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1448 generation, 64);
1449BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1450BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1451BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1452BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1453
1454static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1455{
1456 return (btrfs_header_flags(eb) & flag) == flag;
1457}
1458
1459static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1460{
1461 u64 flags = btrfs_header_flags(eb);
1462 btrfs_set_header_flags(eb, flags | flag);
1463 return (flags & flag) == flag;
1464}
1465
1466static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1467{
1468 u64 flags = btrfs_header_flags(eb);
1469 btrfs_set_header_flags(eb, flags & ~flag);
1470 return (flags & flag) == flag;
1471}
1472
1473static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1474{
1475 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1476 return (u8 *)ptr;
1477}
1478
1479static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1480{
1481 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1482 return (u8 *)ptr;
1483}
1484
1485static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1486{
1487 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1488 return (u8 *)ptr;
1489}
1490
1491static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1492{
1493 unsigned long ptr = offsetof(struct btrfs_header, csum);
1494 return (u8 *)ptr;
1495}
1496
1497static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1498{
1499 return NULL;
1500}
1501
1502static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1503{
1504 return NULL;
1505}
1506
1507static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1508{
1509 return NULL;
1510}
1511
1512static inline int btrfs_is_leaf(struct extent_buffer *eb)
1513{
1514 return btrfs_header_level(eb) == 0;
1515}
1516
1517/* struct btrfs_root_item */
1518BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1519 generation, 64);
1520BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1521BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1522BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1523
1524BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1525 generation, 64);
1526BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1527BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1528BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1529BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1530BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1531BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1532BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1533BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1534 last_snapshot, 64);
1535
1536/* struct btrfs_super_block */
1537
1538BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1539BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1540BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1541 generation, 64);
1542BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1543BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1544 struct btrfs_super_block, sys_chunk_array_size, 32);
1545BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1546 struct btrfs_super_block, chunk_root_generation, 64);
1547BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1548 root_level, 8);
1549BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1550 chunk_root, 64);
1551BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1552 chunk_root_level, 8);
1553BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1554 log_root, 64);
1555BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1556 log_root_transid, 64);
1557BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1558 log_root_level, 8);
1559BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1560 total_bytes, 64);
1561BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1562 bytes_used, 64);
1563BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1564 sectorsize, 32);
1565BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1566 nodesize, 32);
1567BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1568 leafsize, 32);
1569BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1570 stripesize, 32);
1571BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1572 root_dir_objectid, 64);
1573BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1574 num_devices, 64);
1575BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1576 compat_flags, 64);
1577BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1578 compat_flags, 64);
1579BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1580 incompat_flags, 64);
1581BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1582 csum_type, 16);
1583
1584static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1585{
1586 int t = btrfs_super_csum_type(s);
1587 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1588 return btrfs_csum_sizes[t];
1589}
1590
1591static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1592{
1593 return offsetof(struct btrfs_leaf, items);
1594}
1595
1596/* struct btrfs_file_extent_item */
1597BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1598
1599static inline unsigned long
1600btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
1601{
1602 unsigned long offset = (unsigned long)e;
1603 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1604 return offset;
1605}
1606
1607static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1608{
1609 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1610}
1611
1612BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1613 disk_bytenr, 64);
1614BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1615 generation, 64);
1616BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1617 disk_num_bytes, 64);
1618BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1619 offset, 64);
1620BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1621 num_bytes, 64);
1622BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1623 ram_bytes, 64);
1624BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1625 compression, 8);
1626BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1627 encryption, 8);
1628BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1629 other_encoding, 16);
1630
1631/* this returns the number of file bytes represented by the inline item.
1632 * If an item is compressed, this is the uncompressed size
1633 */
1634static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1635 struct btrfs_file_extent_item *e)
1636{
1637 return btrfs_file_extent_ram_bytes(eb, e);
1638}
1639
1640/*
1641 * this returns the number of bytes used by the item on disk, minus the
1642 * size of any extent headers. If a file is compressed on disk, this is
1643 * the compressed size
1644 */
1645static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1646 struct btrfs_item *e)
1647{
1648 unsigned long offset;
1649 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1650 return btrfs_item_size(eb, e) - offset;
1651}
1652
1653static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1654{
1655 return sb->s_fs_info;
1656}
1657
1658static inline int btrfs_set_root_name(struct btrfs_root *root,
1659 const char *name, int len)
1660{
1661 /* if we already have a name just free it */
1662 kfree(root->name);
1663
1664 root->name = kmalloc(len+1, GFP_KERNEL);
1665 if (!root->name)
1666 return -ENOMEM;
1667
1668 memcpy(root->name, name, len);
1669 root->name[len] = '\0';
1670
1671 return 0;
1672}
1673
1674static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
1675{
1676 if (level == 0)
1677 return root->leafsize;
1678 return root->nodesize;
1679}
1680
1681/* helper function to cast into the data area of the leaf. */
1682#define btrfs_item_ptr(leaf, slot, type) \
1683 ((type *)(btrfs_leaf_data(leaf) + \
1684 btrfs_item_offset_nr(leaf, slot)))
1685
1686#define btrfs_item_ptr_offset(leaf, slot) \
1687 ((unsigned long)(btrfs_leaf_data(leaf) + \
1688 btrfs_item_offset_nr(leaf, slot)))
1689
1690static inline struct dentry *fdentry(struct file *file)
1691{
1692 return file->f_path.dentry;
1693}
1694
1695/* extent-tree.c */
1696int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1697int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
1698 struct btrfs_root *root, u64 bytenr,
1699 u64 num_bytes, u32 *refs);
1700int btrfs_update_pinned_extents(struct btrfs_root *root,
1701 u64 bytenr, u64 num, int pin);
1702int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1703 struct btrfs_root *root, struct extent_buffer *leaf);
1704int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1705 struct btrfs_root *root, u64 objectid, u64 bytenr);
1706int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1707 struct btrfs_root *root);
1708int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1709struct btrfs_block_group_cache *btrfs_lookup_block_group(
1710 struct btrfs_fs_info *info,
1711 u64 bytenr);
1712u64 btrfs_find_block_group(struct btrfs_root *root,
1713 u64 search_start, u64 search_hint, int owner);
1714struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1715 struct btrfs_root *root,
1716 u32 blocksize, u64 parent,
1717 u64 root_objectid,
1718 u64 ref_generation,
1719 int level,
1720 u64 hint,
1721 u64 empty_size);
1722struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1723 struct btrfs_root *root,
1724 u64 bytenr, u32 blocksize);
1725int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1726 struct btrfs_root *root,
1727 u64 num_bytes, u64 parent, u64 min_bytes,
1728 u64 root_objectid, u64 ref_generation,
1729 u64 owner, u64 empty_size, u64 hint_byte,
1730 u64 search_end, struct btrfs_key *ins, u64 data);
1731int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1732 struct btrfs_root *root, u64 parent,
1733 u64 root_objectid, u64 ref_generation,
1734 u64 owner, struct btrfs_key *ins);
1735int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1736 struct btrfs_root *root, u64 parent,
1737 u64 root_objectid, u64 ref_generation,
1738 u64 owner, struct btrfs_key *ins);
1739int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1740 struct btrfs_root *root,
1741 u64 num_bytes, u64 min_alloc_size,
1742 u64 empty_size, u64 hint_byte,
1743 u64 search_end, struct btrfs_key *ins,
1744 u64 data);
1745int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1746 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1747 u32 *nr_extents);
1748int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1749 struct extent_buffer *buf, u32 nr_extents);
1750int btrfs_update_ref(struct btrfs_trans_handle *trans,
1751 struct btrfs_root *root, struct extent_buffer *orig_buf,
1752 struct extent_buffer *buf, int start_slot, int nr);
1753int btrfs_free_extent(struct btrfs_trans_handle *trans,
1754 struct btrfs_root *root,
1755 u64 bytenr, u64 num_bytes, u64 parent,
1756 u64 root_objectid, u64 ref_generation,
1757 u64 owner_objectid, int pin);
1758int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1759int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1760 struct btrfs_root *root,
1761 struct extent_io_tree *unpin);
1762int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1763 struct btrfs_root *root,
1764 u64 bytenr, u64 num_bytes, u64 parent,
1765 u64 root_objectid, u64 ref_generation,
1766 u64 owner_objectid);
1767int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1768 struct btrfs_root *root, u64 bytenr,
1769 u64 orig_parent, u64 parent,
1770 u64 root_objectid, u64 ref_generation,
1771 u64 owner_objectid);
1772int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1773 struct btrfs_root *root);
1774int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
1775int btrfs_free_block_groups(struct btrfs_fs_info *info);
1776int btrfs_read_block_groups(struct btrfs_root *root);
1777int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1778 struct btrfs_root *root, u64 bytes_used,
1779 u64 type, u64 chunk_objectid, u64 chunk_offset,
1780 u64 size);
1781int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1782 struct btrfs_root *root, u64 group_start);
1783int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1784int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
1785 struct btrfs_root *root);
1786int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1787int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1788 struct btrfs_root *root,
1789 struct extent_buffer *buf, u64 orig_start);
1790int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1791int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1792int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
1793u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
1794/* ctree.c */
1795int btrfs_previous_item(struct btrfs_root *root,
1796 struct btrfs_path *path, u64 min_objectid,
1797 int type);
1798int btrfs_merge_path(struct btrfs_trans_handle *trans,
1799 struct btrfs_root *root,
1800 struct btrfs_key *node_keys,
1801 u64 *nodes, int lowest_level);
1802int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1803 struct btrfs_root *root, struct btrfs_path *path,
1804 struct btrfs_key *new_key);
1805struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1806struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1807int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1808 struct btrfs_key *key, int lowest_level,
1809 int cache_only, u64 min_trans);
1810int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1811 struct btrfs_key *max_key,
1812 struct btrfs_path *path, int cache_only,
1813 u64 min_trans);
1814int btrfs_cow_block(struct btrfs_trans_handle *trans,
1815 struct btrfs_root *root, struct extent_buffer *buf,
1816 struct extent_buffer *parent, int parent_slot,
1817 struct extent_buffer **cow_ret, u64 prealloc_dest);
1818int btrfs_copy_root(struct btrfs_trans_handle *trans,
1819 struct btrfs_root *root,
1820 struct extent_buffer *buf,
1821 struct extent_buffer **cow_ret, u64 new_root_objectid);
1822int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1823 *root, struct btrfs_path *path, u32 data_size);
1824int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1825 struct btrfs_root *root,
1826 struct btrfs_path *path,
1827 u32 new_size, int from_end);
1828int btrfs_split_item(struct btrfs_trans_handle *trans,
1829 struct btrfs_root *root,
1830 struct btrfs_path *path,
1831 struct btrfs_key *new_key,
1832 unsigned long split_offset);
1833int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1834 *root, struct btrfs_key *key, struct btrfs_path *p, int
1835 ins_len, int cow);
1836int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1837 struct btrfs_root *root, struct extent_buffer *parent,
1838 int start_slot, int cache_only, u64 *last_ret,
1839 struct btrfs_key *progress);
1840void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1841struct btrfs_path *btrfs_alloc_path(void);
1842void btrfs_free_path(struct btrfs_path *p);
1843void btrfs_init_path(struct btrfs_path *p);
1844int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1845 struct btrfs_path *path, int slot, int nr);
1846int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1847 struct btrfs_root *root,
1848 struct btrfs_path *path, u64 bytenr);
1849static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1850 struct btrfs_root *root,
1851 struct btrfs_path *path)
1852{
1853 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1854}
1855
1856int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1857 *root, struct btrfs_key *key, void *data, u32 data_size);
1858int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
1859 struct btrfs_root *root,
1860 struct btrfs_path *path,
1861 struct btrfs_key *cpu_key, u32 *data_size,
1862 int nr);
1863int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1864 struct btrfs_root *root,
1865 struct btrfs_path *path,
1866 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1867
1868static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1869 struct btrfs_root *root,
1870 struct btrfs_path *path,
1871 struct btrfs_key *key,
1872 u32 data_size)
1873{
1874 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1875}
1876
1877int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1878int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1879int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1880int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1881 *root);
1882int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
1883 struct btrfs_root *root,
1884 struct extent_buffer *node,
1885 struct extent_buffer *parent);
1886/* root-item.c */
1887int btrfs_find_root_ref(struct btrfs_root *tree_root,
1888 struct btrfs_path *path,
1889 u64 root_id, u64 ref_id);
1890int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1891 struct btrfs_root *tree_root,
1892 u64 root_id, u8 type, u64 ref_id,
1893 u64 dirid, u64 sequence,
1894 const char *name, int name_len);
1895int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1896 struct btrfs_key *key);
1897int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1898 *root, struct btrfs_key *key, struct btrfs_root_item
1899 *item);
1900int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1901 *root, struct btrfs_key *key, struct btrfs_root_item
1902 *item);
1903int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1904 btrfs_root_item *item, struct btrfs_key *key);
1905int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1906 u64 *found_objectid);
1907int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1908 struct btrfs_root *latest_root);
1909/* dir-item.c */
1910int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
1911 struct btrfs_root *root, const char *name,
1912 int name_len, u64 dir,
1913 struct btrfs_key *location, u8 type, u64 index);
1914struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1915 struct btrfs_root *root,
1916 struct btrfs_path *path, u64 dir,
1917 const char *name, int name_len,
1918 int mod);
1919struct btrfs_dir_item *
1920btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1921 struct btrfs_root *root,
1922 struct btrfs_path *path, u64 dir,
1923 u64 objectid, const char *name, int name_len,
1924 int mod);
1925struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1926 struct btrfs_path *path,
1927 const char *name, int name_len);
1928int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1929 struct btrfs_root *root,
1930 struct btrfs_path *path,
1931 struct btrfs_dir_item *di);
1932int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1933 struct btrfs_root *root, const char *name,
1934 u16 name_len, const void *data, u16 data_len,
1935 u64 dir);
1936struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1937 struct btrfs_root *root,
1938 struct btrfs_path *path, u64 dir,
1939 const char *name, u16 name_len,
1940 int mod);
1941
1942/* orphan.c */
1943int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1944 struct btrfs_root *root, u64 offset);
1945int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1946 struct btrfs_root *root, u64 offset);
1947
1948/* inode-map.c */
1949int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1950 struct btrfs_root *fs_root,
1951 u64 dirid, u64 *objectid);
1952int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1953
1954/* inode-item.c */
1955int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1956 struct btrfs_root *root,
1957 const char *name, int name_len,
1958 u64 inode_objectid, u64 ref_objectid, u64 index);
1959int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1960 struct btrfs_root *root,
1961 const char *name, int name_len,
1962 u64 inode_objectid, u64 ref_objectid, u64 *index);
1963int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1964 struct btrfs_root *root,
1965 struct btrfs_path *path, u64 objectid);
1966int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1967 *root, struct btrfs_path *path,
1968 struct btrfs_key *location, int mod);
1969
1970/* file-item.c */
1971int btrfs_del_csums(struct btrfs_trans_handle *trans,
1972 struct btrfs_root *root, u64 bytenr, u64 len);
1973int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1974 struct bio *bio, u32 *dst);
1975int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1976 struct btrfs_root *root,
1977 u64 objectid, u64 pos,
1978 u64 disk_offset, u64 disk_num_bytes,
1979 u64 num_bytes, u64 offset, u64 ram_bytes,
1980 u8 compression, u8 encryption, u16 other_encoding);
1981int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1982 struct btrfs_root *root,
1983 struct btrfs_path *path, u64 objectid,
1984 u64 bytenr, int mod);
1985int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1986 struct btrfs_root *root,
1987 struct btrfs_ordered_sum *sums);
1988int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1989 struct bio *bio, u64 file_start, int contig);
1990int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
1991 u64 start, unsigned long len);
1992struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1993 struct btrfs_root *root,
1994 struct btrfs_path *path,
1995 u64 bytenr, int cow);
1996int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1997 struct btrfs_root *root, struct btrfs_path *path,
1998 u64 isize);
1999int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2000 u64 end, struct list_head *list);
2001/* inode.c */
2002
2003/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2004#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2005#define ClearPageChecked ClearPageFsMisc
2006#define SetPageChecked SetPageFsMisc
2007#define PageChecked PageFsMisc
2008#endif
2009
2010struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2011int btrfs_set_inode_index(struct inode *dir, u64 *index);
2012int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2013 struct btrfs_root *root,
2014 struct inode *dir, struct inode *inode,
2015 const char *name, int name_len);
2016int btrfs_add_link(struct btrfs_trans_handle *trans,
2017 struct inode *parent_inode, struct inode *inode,
2018 const char *name, int name_len, int add_backref, u64 index);
2019int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2020 struct btrfs_root *root,
2021 struct inode *inode, u64 new_size,
2022 u32 min_type);
2023
2024int btrfs_start_delalloc_inodes(struct btrfs_root *root);
2025int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
2026int btrfs_writepages(struct address_space *mapping,
2027 struct writeback_control *wbc);
2028int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2029 struct btrfs_root *new_root, struct dentry *dentry,
2030 u64 new_dirid, u64 alloc_hint);
2031int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2032 size_t size, struct bio *bio, unsigned long bio_flags);
2033
2034unsigned long btrfs_force_ra(struct address_space *mapping,
2035 struct file_ra_state *ra, struct file *file,
2036 pgoff_t offset, pgoff_t last_index);
2037int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
2038 int for_del);
2039int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
2040int btrfs_readpage(struct file *file, struct page *page);
2041void btrfs_delete_inode(struct inode *inode);
2042void btrfs_put_inode(struct inode *inode);
2043void btrfs_read_locked_inode(struct inode *inode);
2044int btrfs_write_inode(struct inode *inode, int wait);
2045void btrfs_dirty_inode(struct inode *inode);
2046struct inode *btrfs_alloc_inode(struct super_block *sb);
2047void btrfs_destroy_inode(struct inode *inode);
2048int btrfs_init_cachep(void);
2049void btrfs_destroy_cachep(void);
2050long btrfs_ioctl_trans_end(struct file *file);
2051struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
2052 struct btrfs_root *root, int wait);
2053struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
2054 struct btrfs_root *root);
2055struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2056 struct btrfs_root *root, int *is_new);
2057int btrfs_commit_write(struct file *file, struct page *page,
2058 unsigned from, unsigned to);
2059struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2060 size_t page_offset, u64 start, u64 end,
2061 int create);
2062int btrfs_update_inode(struct btrfs_trans_handle *trans,
2063 struct btrfs_root *root,
2064 struct inode *inode);
2065int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2066int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2067void btrfs_orphan_cleanup(struct btrfs_root *root);
2068int btrfs_cont_expand(struct inode *inode, loff_t size);
2069
2070/* ioctl.c */
2071long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2072
2073/* file.c */
2074int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
2075int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2076 int skip_pinned);
2077int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2078extern struct file_operations btrfs_file_operations;
2079int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2080 struct btrfs_root *root, struct inode *inode,
2081 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
2082int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2083 struct btrfs_root *root,
2084 struct inode *inode, u64 start, u64 end);
2085int btrfs_release_file(struct inode *inode, struct file *file);
2086
2087/* tree-defrag.c */
2088int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2089 struct btrfs_root *root, int cache_only);
2090
2091/* sysfs.c */
2092int btrfs_init_sysfs(void);
2093void btrfs_exit_sysfs(void);
2094int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2095int btrfs_sysfs_add_root(struct btrfs_root *root);
2096void btrfs_sysfs_del_root(struct btrfs_root *root);
2097void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2098
2099/* xattr.c */
2100ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2101
2102/* super.c */
2103u64 btrfs_parse_size(char *str);
2104int btrfs_parse_options(struct btrfs_root *root, char *options);
2105int btrfs_sync_fs(struct super_block *sb, int wait);
2106
2107/* acl.c */
2108int btrfs_check_acl(struct inode *inode, int mask);
2109int btrfs_init_acl(struct inode *inode, struct inode *dir);
2110int btrfs_acl_chmod(struct inode *inode);
2111
2112/* free-space-cache.c */
2113int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
2114 u64 bytenr, u64 size);
2115int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group,
2116 u64 offset, u64 bytes);
2117int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
2118 u64 bytenr, u64 size);
2119int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group,
2120 u64 offset, u64 bytes);
2121void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2122 *block_group);
2123struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
2124 *block_group, u64 offset,
2125 u64 bytes);
2126void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
2127 u64 bytes);
2128u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);
2129#endif
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-11 02:07:16 -0500