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19#ifndef __BTRFS_CTREE__
20#define __BTRFS_CTREE__
21
22#include <linux/mm.h>
23#include <linux/highmem.h>
24#include <linux/fs.h>
25#include <linux/rwsem.h>
26#include <linux/semaphore.h>
27#include <linux/completion.h>
28#include <linux/backing-dev.h>
29#include <linux/wait.h>
30#include <linux/slab.h>
31#include <linux/kobject.h>
32#include <trace/events/btrfs.h>
33#include <asm/kmap_types.h>
34#include <linux/pagemap.h>
35#include <linux/btrfs.h>
36#include <linux/btrfs_tree.h>
37#include <linux/workqueue.h>
38#include <linux/security.h>
39#include <linux/sizes.h>
40#include <linux/dynamic_debug.h>
41#include "extent_io.h"
42#include "extent_map.h"
43#include "async-thread.h"
44
45struct btrfs_trans_handle;
46struct btrfs_transaction;
47struct btrfs_pending_snapshot;
48extern struct kmem_cache *btrfs_trans_handle_cachep;
49extern struct kmem_cache *btrfs_transaction_cachep;
50extern struct kmem_cache *btrfs_bit_radix_cachep;
51extern struct kmem_cache *btrfs_path_cachep;
52extern struct kmem_cache *btrfs_free_space_cachep;
53struct btrfs_ordered_sum;
54
55#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
56#define STATIC noinline
57#else
58#define STATIC static noinline
59#endif
60
61#define BTRFS_MAGIC 0x4D5F53665248425FULL
62
63#define BTRFS_MAX_MIRRORS 3
64
65#define BTRFS_MAX_LEVEL 8
66
67#define BTRFS_COMPAT_EXTENT_TREE_V0
68
69
70
71
72
73#define BTRFS_MAX_METADATA_BLOCKSIZE 65536
74
75
76
77
78
79#define BTRFS_NAME_LEN 255
80
81
82
83
84
85
86#define BTRFS_LINK_MAX 65535U
87
88static const int btrfs_csum_sizes[] = { 4 };
89
90
91#define BTRFS_EMPTY_DIR_SIZE 0
92
93
94#define REQ_GET_READ_MIRRORS (1 << 30)
95
96
97#define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
98
99#define BTRFS_DIRTY_METADATA_THRESH SZ_32M
100
101#define BTRFS_MAX_EXTENT_SIZE SZ_128M
102
103struct btrfs_mapping_tree {
104 struct extent_map_tree map_tree;
105};
106
107static inline unsigned long btrfs_chunk_item_size(int num_stripes)
108{
109 BUG_ON(num_stripes == 0);
110 return sizeof(struct btrfs_chunk) +
111 sizeof(struct btrfs_stripe) * (num_stripes - 1);
112}
113
114
115
116
117#define BTRFS_FS_STATE_ERROR 0
118#define BTRFS_FS_STATE_REMOUNTING 1
119#define BTRFS_FS_STATE_TRANS_ABORTED 2
120#define BTRFS_FS_STATE_DEV_REPLACING 3
121#define BTRFS_FS_STATE_DUMMY_FS_INFO 4
122
123#define BTRFS_BACKREF_REV_MAX 256
124#define BTRFS_BACKREF_REV_SHIFT 56
125#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
126 BTRFS_BACKREF_REV_SHIFT)
127
128#define BTRFS_OLD_BACKREF_REV 0
129#define BTRFS_MIXED_BACKREF_REV 1
130
131
132
133
134struct btrfs_header {
135
136 u8 csum[BTRFS_CSUM_SIZE];
137 u8 fsid[BTRFS_FSID_SIZE];
138 __le64 bytenr;
139 __le64 flags;
140
141
142 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
143 __le64 generation;
144 __le64 owner;
145 __le32 nritems;
146 u8 level;
147} __attribute__ ((__packed__));
148
149
150
151
152
153#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
154
155
156
157
158
159
160#define BTRFS_NUM_BACKUP_ROOTS 4
161struct btrfs_root_backup {
162 __le64 tree_root;
163 __le64 tree_root_gen;
164
165 __le64 chunk_root;
166 __le64 chunk_root_gen;
167
168 __le64 extent_root;
169 __le64 extent_root_gen;
170
171 __le64 fs_root;
172 __le64 fs_root_gen;
173
174 __le64 dev_root;
175 __le64 dev_root_gen;
176
177 __le64 csum_root;
178 __le64 csum_root_gen;
179
180 __le64 total_bytes;
181 __le64 bytes_used;
182 __le64 num_devices;
183
184 __le64 unused_64[4];
185
186 u8 tree_root_level;
187 u8 chunk_root_level;
188 u8 extent_root_level;
189 u8 fs_root_level;
190 u8 dev_root_level;
191 u8 csum_root_level;
192
193 u8 unused_8[10];
194} __attribute__ ((__packed__));
195
196
197
198
199
200struct btrfs_super_block {
201 u8 csum[BTRFS_CSUM_SIZE];
202
203 u8 fsid[BTRFS_FSID_SIZE];
204 __le64 bytenr;
205 __le64 flags;
206
207
208 __le64 magic;
209 __le64 generation;
210 __le64 root;
211 __le64 chunk_root;
212 __le64 log_root;
213
214
215 __le64 log_root_transid;
216 __le64 total_bytes;
217 __le64 bytes_used;
218 __le64 root_dir_objectid;
219 __le64 num_devices;
220 __le32 sectorsize;
221 __le32 nodesize;
222 __le32 __unused_leafsize;
223 __le32 stripesize;
224 __le32 sys_chunk_array_size;
225 __le64 chunk_root_generation;
226 __le64 compat_flags;
227 __le64 compat_ro_flags;
228 __le64 incompat_flags;
229 __le16 csum_type;
230 u8 root_level;
231 u8 chunk_root_level;
232 u8 log_root_level;
233 struct btrfs_dev_item dev_item;
234
235 char label[BTRFS_LABEL_SIZE];
236
237 __le64 cache_generation;
238 __le64 uuid_tree_generation;
239
240
241 __le64 reserved[30];
242 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
243 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
244} __attribute__ ((__packed__));
245
246
247
248
249
250#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
251#define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
252#define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
253
254#define BTRFS_FEATURE_COMPAT_RO_SUPP \
255 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
256 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
257
258#define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
259#define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
260
261#define BTRFS_FEATURE_INCOMPAT_SUPP \
262 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
263 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
264 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
265 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
266 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
267 BTRFS_FEATURE_INCOMPAT_RAID56 | \
268 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
269 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
270 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
271
272#define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
273 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
274#define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
275
276
277
278
279
280struct btrfs_item {
281 struct btrfs_disk_key key;
282 __le32 offset;
283 __le32 size;
284} __attribute__ ((__packed__));
285
286
287
288
289
290
291
292
293struct btrfs_leaf {
294 struct btrfs_header header;
295 struct btrfs_item items[];
296} __attribute__ ((__packed__));
297
298
299
300
301
302struct btrfs_key_ptr {
303 struct btrfs_disk_key key;
304 __le64 blockptr;
305 __le64 generation;
306} __attribute__ ((__packed__));
307
308struct btrfs_node {
309 struct btrfs_header header;
310 struct btrfs_key_ptr ptrs[];
311} __attribute__ ((__packed__));
312
313
314
315
316
317
318
319
320
321enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
322struct btrfs_path {
323 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
324 int slots[BTRFS_MAX_LEVEL];
325
326 u8 locks[BTRFS_MAX_LEVEL];
327 u8 reada;
328
329 u8 lowest_level;
330
331
332
333
334
335 unsigned int search_for_split:1;
336 unsigned int keep_locks:1;
337 unsigned int skip_locking:1;
338 unsigned int leave_spinning:1;
339 unsigned int search_commit_root:1;
340 unsigned int need_commit_sem:1;
341 unsigned int skip_release_on_error:1;
342};
343#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
344 sizeof(struct btrfs_item))
345struct btrfs_dev_replace {
346 u64 replace_state;
347 u64 time_started;
348 u64 time_stopped;
349 atomic64_t num_write_errors;
350 atomic64_t num_uncorrectable_read_errors;
351
352 u64 cursor_left;
353 u64 committed_cursor_left;
354 u64 cursor_left_last_write_of_item;
355 u64 cursor_right;
356
357 u64 cont_reading_from_srcdev_mode;
358
359 int is_valid;
360 int item_needs_writeback;
361 struct btrfs_device *srcdev;
362 struct btrfs_device *tgtdev;
363
364 pid_t lock_owner;
365 atomic_t nesting_level;
366 struct mutex lock_finishing_cancel_unmount;
367 rwlock_t lock;
368 atomic_t read_locks;
369 atomic_t blocking_readers;
370 wait_queue_head_t read_lock_wq;
371
372 struct btrfs_scrub_progress scrub_progress;
373};
374
375
376struct raid_kobject {
377 int raid_type;
378 struct kobject kobj;
379};
380
381struct btrfs_space_info {
382 spinlock_t lock;
383
384 u64 total_bytes;
385
386 u64 bytes_used;
387
388 u64 bytes_pinned;
389
390 u64 bytes_reserved;
391
392 u64 bytes_may_use;
393
394 u64 bytes_readonly;
395
396 u64 max_extent_size;
397
398
399
400 unsigned int full:1;
401
402 unsigned int chunk_alloc:1;
403
404 unsigned int flush:1;
405
406 unsigned int force_alloc;
407
408
409 u64 disk_used;
410 u64 disk_total;
411
412
413 u64 flags;
414
415
416
417
418
419
420
421
422
423
424
425 struct percpu_counter total_bytes_pinned;
426
427 struct list_head list;
428
429 struct list_head ro_bgs;
430 struct list_head priority_tickets;
431 struct list_head tickets;
432 u64 tickets_id;
433
434 struct rw_semaphore groups_sem;
435
436 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
437 wait_queue_head_t wait;
438
439 struct kobject kobj;
440 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
441};
442
443#define BTRFS_BLOCK_RSV_GLOBAL 1
444#define BTRFS_BLOCK_RSV_DELALLOC 2
445#define BTRFS_BLOCK_RSV_TRANS 3
446#define BTRFS_BLOCK_RSV_CHUNK 4
447#define BTRFS_BLOCK_RSV_DELOPS 5
448#define BTRFS_BLOCK_RSV_EMPTY 6
449#define BTRFS_BLOCK_RSV_TEMP 7
450
451struct btrfs_block_rsv {
452 u64 size;
453 u64 reserved;
454 struct btrfs_space_info *space_info;
455 spinlock_t lock;
456 unsigned short full;
457 unsigned short type;
458 unsigned short failfast;
459};
460
461
462
463
464
465
466struct btrfs_free_cluster {
467 spinlock_t lock;
468 spinlock_t refill_lock;
469 struct rb_root root;
470
471
472 u64 max_size;
473
474
475 u64 window_start;
476
477
478 bool fragmented;
479
480 struct btrfs_block_group_cache *block_group;
481
482
483
484
485
486 struct list_head block_group_list;
487};
488
489enum btrfs_caching_type {
490 BTRFS_CACHE_NO = 0,
491 BTRFS_CACHE_STARTED = 1,
492 BTRFS_CACHE_FAST = 2,
493 BTRFS_CACHE_FINISHED = 3,
494 BTRFS_CACHE_ERROR = 4,
495};
496
497enum btrfs_disk_cache_state {
498 BTRFS_DC_WRITTEN = 0,
499 BTRFS_DC_ERROR = 1,
500 BTRFS_DC_CLEAR = 2,
501 BTRFS_DC_SETUP = 3,
502};
503
504struct btrfs_caching_control {
505 struct list_head list;
506 struct mutex mutex;
507 wait_queue_head_t wait;
508 struct btrfs_work work;
509 struct btrfs_block_group_cache *block_group;
510 u64 progress;
511 atomic_t count;
512};
513
514
515#define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
516
517struct btrfs_io_ctl {
518 void *cur, *orig;
519 struct page *page;
520 struct page **pages;
521 struct btrfs_root *root;
522 struct inode *inode;
523 unsigned long size;
524 int index;
525 int num_pages;
526 int entries;
527 int bitmaps;
528 unsigned check_crcs:1;
529};
530
531struct btrfs_block_group_cache {
532 struct btrfs_key key;
533 struct btrfs_block_group_item item;
534 struct btrfs_fs_info *fs_info;
535 struct inode *inode;
536 spinlock_t lock;
537 u64 pinned;
538 u64 reserved;
539 u64 delalloc_bytes;
540 u64 bytes_super;
541 u64 flags;
542 u64 cache_generation;
543 u32 sectorsize;
544
545
546
547
548
549 u32 bitmap_high_thresh;
550
551
552
553
554
555 u32 bitmap_low_thresh;
556
557
558
559
560
561
562 struct rw_semaphore data_rwsem;
563
564
565 unsigned long full_stripe_len;
566
567 unsigned int ro;
568 unsigned int iref:1;
569 unsigned int has_caching_ctl:1;
570 unsigned int removed:1;
571
572 int disk_cache_state;
573
574
575 int cached;
576 struct btrfs_caching_control *caching_ctl;
577 u64 last_byte_to_unpin;
578
579 struct btrfs_space_info *space_info;
580
581
582 struct btrfs_free_space_ctl *free_space_ctl;
583
584
585 struct rb_node cache_node;
586
587
588 struct list_head list;
589
590
591 atomic_t count;
592
593
594
595
596 struct list_head cluster_list;
597
598
599 struct list_head bg_list;
600
601
602 struct list_head ro_list;
603
604 atomic_t trimming;
605
606
607 struct list_head dirty_list;
608 struct list_head io_list;
609
610 struct btrfs_io_ctl io_ctl;
611
612
613
614
615
616
617
618
619
620
621 atomic_t reservations;
622
623
624
625
626
627
628
629
630
631 atomic_t nocow_writers;
632
633
634 struct mutex free_space_lock;
635
636
637
638
639
640 int needs_free_space;
641};
642
643
644struct seq_list {
645 struct list_head list;
646 u64 seq;
647};
648
649#define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
650
651enum btrfs_orphan_cleanup_state {
652 ORPHAN_CLEANUP_STARTED = 1,
653 ORPHAN_CLEANUP_DONE = 2,
654};
655
656
657struct btrfs_stripe_hash {
658 struct list_head hash_list;
659 wait_queue_head_t wait;
660 spinlock_t lock;
661};
662
663
664struct btrfs_stripe_hash_table {
665 struct list_head stripe_cache;
666 spinlock_t cache_lock;
667 int cache_size;
668 struct btrfs_stripe_hash table[];
669};
670
671#define BTRFS_STRIPE_HASH_TABLE_BITS 11
672
673void btrfs_init_async_reclaim_work(struct work_struct *work);
674
675
676struct reloc_control;
677struct btrfs_device;
678struct btrfs_fs_devices;
679struct btrfs_balance_control;
680struct btrfs_delayed_root;
681
682#define BTRFS_FS_BARRIER 1
683#define BTRFS_FS_CLOSING_START 2
684#define BTRFS_FS_CLOSING_DONE 3
685#define BTRFS_FS_LOG_RECOVERING 4
686#define BTRFS_FS_OPEN 5
687#define BTRFS_FS_QUOTA_ENABLED 6
688#define BTRFS_FS_QUOTA_ENABLING 7
689#define BTRFS_FS_QUOTA_DISABLING 8
690#define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
691#define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
692#define BTRFS_FS_BTREE_ERR 11
693#define BTRFS_FS_LOG1_ERR 12
694#define BTRFS_FS_LOG2_ERR 13
695
696struct btrfs_fs_info {
697 u8 fsid[BTRFS_FSID_SIZE];
698 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
699 unsigned long flags;
700 struct btrfs_root *extent_root;
701 struct btrfs_root *tree_root;
702 struct btrfs_root *chunk_root;
703 struct btrfs_root *dev_root;
704 struct btrfs_root *fs_root;
705 struct btrfs_root *csum_root;
706 struct btrfs_root *quota_root;
707 struct btrfs_root *uuid_root;
708 struct btrfs_root *free_space_root;
709
710
711 struct btrfs_root *log_root_tree;
712
713 spinlock_t fs_roots_radix_lock;
714 struct radix_tree_root fs_roots_radix;
715
716
717 spinlock_t block_group_cache_lock;
718 u64 first_logical_byte;
719 struct rb_root block_group_cache_tree;
720
721
722 spinlock_t free_chunk_lock;
723 u64 free_chunk_space;
724
725 struct extent_io_tree freed_extents[2];
726 struct extent_io_tree *pinned_extents;
727
728
729 struct btrfs_mapping_tree mapping_tree;
730
731
732
733
734
735 struct btrfs_block_rsv global_block_rsv;
736
737 struct btrfs_block_rsv delalloc_block_rsv;
738
739 struct btrfs_block_rsv trans_block_rsv;
740
741 struct btrfs_block_rsv chunk_block_rsv;
742
743 struct btrfs_block_rsv delayed_block_rsv;
744
745 struct btrfs_block_rsv empty_block_rsv;
746
747 u64 generation;
748 u64 last_trans_committed;
749 u64 avg_delayed_ref_runtime;
750
751
752
753
754
755 u64 last_trans_log_full_commit;
756 unsigned long mount_opt;
757
758
759
760
761 unsigned long pending_changes;
762 unsigned long compress_type:4;
763 int commit_interval;
764
765
766
767
768
769
770 u64 max_inline;
771
772
773
774
775
776
777
778
779
780
781 u64 alloc_start;
782 struct btrfs_transaction *running_transaction;
783 wait_queue_head_t transaction_throttle;
784 wait_queue_head_t transaction_wait;
785 wait_queue_head_t transaction_blocked_wait;
786 wait_queue_head_t async_submit_wait;
787
788
789
790
791
792
793
794
795
796
797
798 spinlock_t super_lock;
799 struct btrfs_super_block *super_copy;
800 struct btrfs_super_block *super_for_commit;
801 struct block_device *__bdev;
802 struct super_block *sb;
803 struct inode *btree_inode;
804 struct backing_dev_info bdi;
805 struct mutex tree_log_mutex;
806 struct mutex transaction_kthread_mutex;
807 struct mutex cleaner_mutex;
808 struct mutex chunk_mutex;
809 struct mutex volume_mutex;
810
811
812
813
814
815 struct mutex ro_block_group_mutex;
816
817
818
819
820
821 struct btrfs_stripe_hash_table *stripe_hash_table;
822
823
824
825
826
827
828
829
830 struct mutex ordered_operations_mutex;
831
832 struct rw_semaphore commit_root_sem;
833
834 struct rw_semaphore cleanup_work_sem;
835
836 struct rw_semaphore subvol_sem;
837 struct srcu_struct subvol_srcu;
838
839 spinlock_t trans_lock;
840
841
842
843
844 struct mutex reloc_mutex;
845
846 struct list_head trans_list;
847 struct list_head dead_roots;
848 struct list_head caching_block_groups;
849
850 spinlock_t delayed_iput_lock;
851 struct list_head delayed_iputs;
852 struct mutex cleaner_delayed_iput_mutex;
853
854
855 spinlock_t tree_mod_seq_lock;
856 atomic64_t tree_mod_seq;
857 struct list_head tree_mod_seq_list;
858
859
860 rwlock_t tree_mod_log_lock;
861 struct rb_root tree_mod_log;
862
863 atomic_t nr_async_submits;
864 atomic_t async_submit_draining;
865 atomic_t nr_async_bios;
866 atomic_t async_delalloc_pages;
867 atomic_t open_ioctl_trans;
868
869
870
871
872 spinlock_t ordered_root_lock;
873
874
875
876
877
878
879
880
881 struct list_head ordered_roots;
882
883 struct mutex delalloc_root_mutex;
884 spinlock_t delalloc_root_lock;
885
886 struct list_head delalloc_roots;
887
888
889
890
891
892
893
894
895
896
897
898 struct btrfs_workqueue *workers;
899 struct btrfs_workqueue *delalloc_workers;
900 struct btrfs_workqueue *flush_workers;
901 struct btrfs_workqueue *endio_workers;
902 struct btrfs_workqueue *endio_meta_workers;
903 struct btrfs_workqueue *endio_raid56_workers;
904 struct btrfs_workqueue *endio_repair_workers;
905 struct btrfs_workqueue *rmw_workers;
906 struct btrfs_workqueue *endio_meta_write_workers;
907 struct btrfs_workqueue *endio_write_workers;
908 struct btrfs_workqueue *endio_freespace_worker;
909 struct btrfs_workqueue *submit_workers;
910 struct btrfs_workqueue *caching_workers;
911 struct btrfs_workqueue *readahead_workers;
912
913
914
915
916
917
918 struct btrfs_workqueue *fixup_workers;
919 struct btrfs_workqueue *delayed_workers;
920
921
922 struct btrfs_workqueue *extent_workers;
923 struct task_struct *transaction_kthread;
924 struct task_struct *cleaner_kthread;
925 int thread_pool_size;
926
927 struct kobject *space_info_kobj;
928
929 u64 total_pinned;
930
931
932 struct percpu_counter dirty_metadata_bytes;
933 struct percpu_counter delalloc_bytes;
934 s32 dirty_metadata_batch;
935 s32 delalloc_batch;
936
937 struct list_head dirty_cowonly_roots;
938
939 struct btrfs_fs_devices *fs_devices;
940
941
942
943
944
945
946 struct list_head space_info;
947
948 struct btrfs_space_info *data_sinfo;
949
950 struct reloc_control *reloc_ctl;
951
952
953 struct btrfs_free_cluster data_alloc_cluster;
954
955
956 struct btrfs_free_cluster meta_alloc_cluster;
957
958
959 spinlock_t defrag_inodes_lock;
960 struct rb_root defrag_inodes;
961 atomic_t defrag_running;
962
963
964 seqlock_t profiles_lock;
965
966
967
968
969
970 u64 avail_data_alloc_bits;
971 u64 avail_metadata_alloc_bits;
972 u64 avail_system_alloc_bits;
973
974
975 spinlock_t balance_lock;
976 struct mutex balance_mutex;
977 atomic_t balance_running;
978 atomic_t balance_pause_req;
979 atomic_t balance_cancel_req;
980 struct btrfs_balance_control *balance_ctl;
981 wait_queue_head_t balance_wait_q;
982
983 unsigned data_chunk_allocations;
984 unsigned metadata_ratio;
985
986 void *bdev_holder;
987
988
989 struct mutex scrub_lock;
990 atomic_t scrubs_running;
991 atomic_t scrub_pause_req;
992 atomic_t scrubs_paused;
993 atomic_t scrub_cancel_req;
994 wait_queue_head_t scrub_pause_wait;
995 int scrub_workers_refcnt;
996 struct btrfs_workqueue *scrub_workers;
997 struct btrfs_workqueue *scrub_wr_completion_workers;
998 struct btrfs_workqueue *scrub_nocow_workers;
999 struct btrfs_workqueue *scrub_parity_workers;
1000
1001#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1002 u32 check_integrity_print_mask;
1003#endif
1004
1005 u64 qgroup_flags;
1006
1007
1008 struct rb_root qgroup_tree;
1009 struct rb_root qgroup_op_tree;
1010 spinlock_t qgroup_lock;
1011 spinlock_t qgroup_op_lock;
1012 atomic_t qgroup_op_seq;
1013
1014
1015
1016
1017
1018 struct ulist *qgroup_ulist;
1019
1020
1021 struct mutex qgroup_ioctl_lock;
1022
1023
1024 struct list_head dirty_qgroups;
1025
1026
1027 u64 qgroup_seq;
1028
1029
1030 struct mutex qgroup_rescan_lock;
1031 struct btrfs_key qgroup_rescan_progress;
1032 struct btrfs_workqueue *qgroup_rescan_workers;
1033 struct completion qgroup_rescan_completion;
1034 struct btrfs_work qgroup_rescan_work;
1035 bool qgroup_rescan_running;
1036
1037
1038 unsigned long fs_state;
1039
1040 struct btrfs_delayed_root *delayed_root;
1041
1042
1043 spinlock_t reada_lock;
1044 struct radix_tree_root reada_tree;
1045
1046
1047 atomic_t reada_works_cnt;
1048
1049
1050 spinlock_t buffer_lock;
1051 struct radix_tree_root buffer_radix;
1052
1053
1054 int backup_root_index;
1055
1056 int num_tolerated_disk_barrier_failures;
1057
1058
1059 struct btrfs_dev_replace dev_replace;
1060
1061 atomic_t mutually_exclusive_operation_running;
1062
1063 struct percpu_counter bio_counter;
1064 wait_queue_head_t replace_wait;
1065
1066 struct semaphore uuid_tree_rescan_sem;
1067
1068
1069 struct work_struct async_reclaim_work;
1070
1071 spinlock_t unused_bgs_lock;
1072 struct list_head unused_bgs;
1073 struct mutex unused_bg_unpin_mutex;
1074 struct mutex delete_unused_bgs_mutex;
1075
1076
1077 struct security_mnt_opts security_opts;
1078
1079
1080
1081
1082
1083 struct list_head pinned_chunks;
1084
1085
1086 int fs_frozen;
1087};
1088
1089struct btrfs_subvolume_writers {
1090 struct percpu_counter counter;
1091 wait_queue_head_t wait;
1092};
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104#define BTRFS_ROOT_IN_TRANS_SETUP 0
1105#define BTRFS_ROOT_REF_COWS 1
1106#define BTRFS_ROOT_TRACK_DIRTY 2
1107#define BTRFS_ROOT_IN_RADIX 3
1108#define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1109#define BTRFS_ROOT_DEFRAG_RUNNING 5
1110#define BTRFS_ROOT_FORCE_COW 6
1111#define BTRFS_ROOT_MULTI_LOG_TASKS 7
1112#define BTRFS_ROOT_DIRTY 8
1113
1114
1115
1116
1117
1118struct btrfs_root {
1119 struct extent_buffer *node;
1120
1121 struct extent_buffer *commit_root;
1122 struct btrfs_root *log_root;
1123 struct btrfs_root *reloc_root;
1124
1125 unsigned long state;
1126 struct btrfs_root_item root_item;
1127 struct btrfs_key root_key;
1128 struct btrfs_fs_info *fs_info;
1129 struct extent_io_tree dirty_log_pages;
1130
1131 struct mutex objectid_mutex;
1132
1133 spinlock_t accounting_lock;
1134 struct btrfs_block_rsv *block_rsv;
1135
1136
1137 struct btrfs_free_space_ctl *free_ino_ctl;
1138 enum btrfs_caching_type ino_cache_state;
1139 spinlock_t ino_cache_lock;
1140 wait_queue_head_t ino_cache_wait;
1141 struct btrfs_free_space_ctl *free_ino_pinned;
1142 u64 ino_cache_progress;
1143 struct inode *ino_cache_inode;
1144
1145 struct mutex log_mutex;
1146 wait_queue_head_t log_writer_wait;
1147 wait_queue_head_t log_commit_wait[2];
1148 struct list_head log_ctxs[2];
1149 atomic_t log_writers;
1150 atomic_t log_commit[2];
1151 atomic_t log_batch;
1152 int log_transid;
1153
1154 int log_transid_committed;
1155
1156 int last_log_commit;
1157 pid_t log_start_pid;
1158
1159 u64 objectid;
1160 u64 last_trans;
1161
1162
1163 u32 sectorsize;
1164
1165
1166 u32 nodesize;
1167
1168 u32 stripesize;
1169
1170 u32 type;
1171
1172 u64 highest_objectid;
1173
1174#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1175
1176 u64 alloc_bytenr;
1177#endif
1178
1179 u64 defrag_trans_start;
1180 struct btrfs_key defrag_progress;
1181 struct btrfs_key defrag_max;
1182 char *name;
1183
1184
1185 struct list_head dirty_list;
1186
1187 struct list_head root_list;
1188
1189 spinlock_t log_extents_lock[2];
1190 struct list_head logged_list[2];
1191
1192 spinlock_t orphan_lock;
1193 atomic_t orphan_inodes;
1194 struct btrfs_block_rsv *orphan_block_rsv;
1195 int orphan_cleanup_state;
1196
1197 spinlock_t inode_lock;
1198
1199 struct rb_root inode_tree;
1200
1201
1202
1203
1204
1205 struct radix_tree_root delayed_nodes_tree;
1206
1207
1208
1209
1210 dev_t anon_dev;
1211
1212 spinlock_t root_item_lock;
1213 atomic_t refs;
1214
1215 struct mutex delalloc_mutex;
1216 spinlock_t delalloc_lock;
1217
1218
1219
1220
1221
1222 struct list_head delalloc_inodes;
1223 struct list_head delalloc_root;
1224 u64 nr_delalloc_inodes;
1225
1226 struct mutex ordered_extent_mutex;
1227
1228
1229
1230
1231 spinlock_t ordered_extent_lock;
1232
1233
1234
1235
1236
1237
1238 struct list_head ordered_extents;
1239 struct list_head ordered_root;
1240 u64 nr_ordered_extents;
1241
1242
1243
1244
1245
1246 int send_in_progress;
1247 struct btrfs_subvolume_writers *subv_writers;
1248 atomic_t will_be_snapshoted;
1249
1250
1251 atomic_t qgroup_meta_rsv;
1252};
1253
1254static inline u32 __BTRFS_LEAF_DATA_SIZE(u32 blocksize)
1255{
1256 return blocksize - sizeof(struct btrfs_header);
1257}
1258
1259static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_root *root)
1260{
1261 return __BTRFS_LEAF_DATA_SIZE(root->nodesize);
1262}
1263
1264static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_root *root)
1265{
1266 return BTRFS_LEAF_DATA_SIZE(root) - sizeof(struct btrfs_item);
1267}
1268
1269static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_root *root)
1270{
1271 return BTRFS_LEAF_DATA_SIZE(root) / sizeof(struct btrfs_key_ptr);
1272}
1273
1274#define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1275 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1276static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_root *root)
1277{
1278 return BTRFS_MAX_ITEM_SIZE(root) -
1279 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1280}
1281
1282static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_root *root)
1283{
1284 return BTRFS_MAX_ITEM_SIZE(root) - sizeof(struct btrfs_dir_item);
1285}
1286
1287
1288
1289
1290
1291
1292#define BTRFS_MOUNT_NODATASUM (1 << 0)
1293#define BTRFS_MOUNT_NODATACOW (1 << 1)
1294#define BTRFS_MOUNT_NOBARRIER (1 << 2)
1295#define BTRFS_MOUNT_SSD (1 << 3)
1296#define BTRFS_MOUNT_DEGRADED (1 << 4)
1297#define BTRFS_MOUNT_COMPRESS (1 << 5)
1298#define BTRFS_MOUNT_NOTREELOG (1 << 6)
1299#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1300#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1301#define BTRFS_MOUNT_NOSSD (1 << 9)
1302#define BTRFS_MOUNT_DISCARD (1 << 10)
1303#define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1304#define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1305#define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1306#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1307#define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1308#define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1309#define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1310#define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1311#define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1312#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1313#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1314#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1315#define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1316#define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1317#define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1318#define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1319#define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1320
1321#define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1322#define BTRFS_DEFAULT_MAX_INLINE (2048)
1323
1324#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1325#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1326#define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1327#define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1328 BTRFS_MOUNT_##opt)
1329
1330#define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1331{ \
1332 if (!btrfs_test_opt(fs_info, opt)) \
1333 btrfs_info(fs_info, fmt, ##args); \
1334 btrfs_set_opt(fs_info->mount_opt, opt); \
1335}
1336
1337#define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1338{ \
1339 if (btrfs_test_opt(fs_info, opt)) \
1340 btrfs_info(fs_info, fmt, ##args); \
1341 btrfs_clear_opt(fs_info->mount_opt, opt); \
1342}
1343
1344#ifdef CONFIG_BTRFS_DEBUG
1345static inline int
1346btrfs_should_fragment_free_space(struct btrfs_root *root,
1347 struct btrfs_block_group_cache *block_group)
1348{
1349 return (btrfs_test_opt(root->fs_info, FRAGMENT_METADATA) &&
1350 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1351 (btrfs_test_opt(root->fs_info, FRAGMENT_DATA) &&
1352 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1353}
1354#endif
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364#define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1365#define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1366#define BTRFS_PENDING_COMMIT (2)
1367
1368#define btrfs_test_pending(info, opt) \
1369 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1370#define btrfs_set_pending(info, opt) \
1371 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1372#define btrfs_clear_pending(info, opt) \
1373 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1374
1375
1376
1377
1378
1379
1380
1381#define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1382do { \
1383 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1384 btrfs_info((info), fmt, ##args); \
1385 btrfs_set_pending((info), SET_##opt); \
1386 btrfs_clear_pending((info), CLEAR_##opt); \
1387 } \
1388} while(0)
1389
1390#define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1391do { \
1392 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1393 btrfs_info((info), fmt, ##args); \
1394 btrfs_set_pending((info), CLEAR_##opt); \
1395 btrfs_clear_pending((info), SET_##opt); \
1396 } \
1397} while(0)
1398
1399
1400
1401
1402#define BTRFS_INODE_NODATASUM (1 << 0)
1403#define BTRFS_INODE_NODATACOW (1 << 1)
1404#define BTRFS_INODE_READONLY (1 << 2)
1405#define BTRFS_INODE_NOCOMPRESS (1 << 3)
1406#define BTRFS_INODE_PREALLOC (1 << 4)
1407#define BTRFS_INODE_SYNC (1 << 5)
1408#define BTRFS_INODE_IMMUTABLE (1 << 6)
1409#define BTRFS_INODE_APPEND (1 << 7)
1410#define BTRFS_INODE_NODUMP (1 << 8)
1411#define BTRFS_INODE_NOATIME (1 << 9)
1412#define BTRFS_INODE_DIRSYNC (1 << 10)
1413#define BTRFS_INODE_COMPRESS (1 << 11)
1414
1415#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1416
1417struct btrfs_map_token {
1418 struct extent_buffer *eb;
1419 char *kaddr;
1420 unsigned long offset;
1421};
1422
1423#define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1424 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1425
1426static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1427{
1428 token->kaddr = NULL;
1429}
1430
1431
1432
1433
1434
1435#define le8_to_cpu(v) (v)
1436#define cpu_to_le8(v) (v)
1437#define __le8 u8
1438
1439#define read_eb_member(eb, ptr, type, member, result) ( \
1440 read_extent_buffer(eb, (char *)(result), \
1441 ((unsigned long)(ptr)) + \
1442 offsetof(type, member), \
1443 sizeof(((type *)0)->member)))
1444
1445#define write_eb_member(eb, ptr, type, member, result) ( \
1446 write_extent_buffer(eb, (char *)(result), \
1447 ((unsigned long)(ptr)) + \
1448 offsetof(type, member), \
1449 sizeof(((type *)0)->member)))
1450
1451#define DECLARE_BTRFS_SETGET_BITS(bits) \
1452u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1453 unsigned long off, \
1454 struct btrfs_map_token *token); \
1455void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1456 unsigned long off, u##bits val, \
1457 struct btrfs_map_token *token); \
1458static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1459 unsigned long off) \
1460{ \
1461 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1462} \
1463static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1464 unsigned long off, u##bits val) \
1465{ \
1466 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1467}
1468
1469DECLARE_BTRFS_SETGET_BITS(8)
1470DECLARE_BTRFS_SETGET_BITS(16)
1471DECLARE_BTRFS_SETGET_BITS(32)
1472DECLARE_BTRFS_SETGET_BITS(64)
1473
1474#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1475static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1476{ \
1477 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1478 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1479} \
1480static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1481 u##bits val) \
1482{ \
1483 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1484 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1485} \
1486static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1487 struct btrfs_map_token *token) \
1488{ \
1489 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1490 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1491} \
1492static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1493 type *s, u##bits val, \
1494 struct btrfs_map_token *token) \
1495{ \
1496 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1497 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1498}
1499
1500#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1501static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1502{ \
1503 type *p = page_address(eb->pages[0]); \
1504 u##bits res = le##bits##_to_cpu(p->member); \
1505 return res; \
1506} \
1507static inline void btrfs_set_##name(struct extent_buffer *eb, \
1508 u##bits val) \
1509{ \
1510 type *p = page_address(eb->pages[0]); \
1511 p->member = cpu_to_le##bits(val); \
1512}
1513
1514#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1515static inline u##bits btrfs_##name(type *s) \
1516{ \
1517 return le##bits##_to_cpu(s->member); \
1518} \
1519static inline void btrfs_set_##name(type *s, u##bits val) \
1520{ \
1521 s->member = cpu_to_le##bits(val); \
1522}
1523
1524BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1525BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1526BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1527BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1528BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1529BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1530 start_offset, 64);
1531BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1532BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1533BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1534BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1535BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1536BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1537
1538BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1539BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1540 total_bytes, 64);
1541BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1542 bytes_used, 64);
1543BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1544 io_align, 32);
1545BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1546 io_width, 32);
1547BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1548 sector_size, 32);
1549BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1550BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1551 dev_group, 32);
1552BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1553 seek_speed, 8);
1554BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1555 bandwidth, 8);
1556BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1557 generation, 64);
1558
1559static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1560{
1561 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1562}
1563
1564static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1565{
1566 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1567}
1568
1569BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1570BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1571BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1572BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1573BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1574BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1575BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1576BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1577BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1578BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1579BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1580
1581static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1582{
1583 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1584}
1585
1586BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1587BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1588BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1589 stripe_len, 64);
1590BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1591 io_align, 32);
1592BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1593 io_width, 32);
1594BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1595 sector_size, 32);
1596BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1597BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1598 num_stripes, 16);
1599BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1600 sub_stripes, 16);
1601BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1602BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1603
1604static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1605 int nr)
1606{
1607 unsigned long offset = (unsigned long)c;
1608 offset += offsetof(struct btrfs_chunk, stripe);
1609 offset += nr * sizeof(struct btrfs_stripe);
1610 return (struct btrfs_stripe *)offset;
1611}
1612
1613static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1614{
1615 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1616}
1617
1618static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1619 struct btrfs_chunk *c, int nr)
1620{
1621 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1622}
1623
1624static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1625 struct btrfs_chunk *c, int nr)
1626{
1627 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1628}
1629
1630
1631BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1632 used, 64);
1633BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1634 used, 64);
1635BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1636 struct btrfs_block_group_item, chunk_objectid, 64);
1637
1638BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1639 struct btrfs_block_group_item, chunk_objectid, 64);
1640BTRFS_SETGET_FUNCS(disk_block_group_flags,
1641 struct btrfs_block_group_item, flags, 64);
1642BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1643 struct btrfs_block_group_item, flags, 64);
1644
1645
1646BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1647 extent_count, 32);
1648BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1649
1650
1651BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1652BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1653
1654
1655BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1656 parent_objectid, 64);
1657BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1658 name_len, 16);
1659BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1660
1661
1662BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1663BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1664BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1665BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1666BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1667BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1668BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1669BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1670BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1671BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1672BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1673BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1674BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1675 generation, 64);
1676BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1677 sequence, 64);
1678BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1679 transid, 64);
1680BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1681BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1682 nbytes, 64);
1683BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1684 block_group, 64);
1685BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1686BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1687BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1688BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1689BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1690BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1691BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1692BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1693BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1694BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1695
1696
1697BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1698 chunk_tree, 64);
1699BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1700 chunk_objectid, 64);
1701BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1702 chunk_offset, 64);
1703BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1704
1705static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1706{
1707 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1708 return (unsigned long)dev + ptr;
1709}
1710
1711BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1712BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1713 generation, 64);
1714BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1715
1716BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1717
1718
1719BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1720
1721static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1722 struct btrfs_tree_block_info *item,
1723 struct btrfs_disk_key *key)
1724{
1725 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1726}
1727
1728static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1729 struct btrfs_tree_block_info *item,
1730 struct btrfs_disk_key *key)
1731{
1732 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1733}
1734
1735BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1736 root, 64);
1737BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1738 objectid, 64);
1739BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1740 offset, 64);
1741BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1742 count, 32);
1743
1744BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1745 count, 32);
1746
1747BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1748 type, 8);
1749BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1750 offset, 64);
1751
1752static inline u32 btrfs_extent_inline_ref_size(int type)
1753{
1754 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1755 type == BTRFS_SHARED_BLOCK_REF_KEY)
1756 return sizeof(struct btrfs_extent_inline_ref);
1757 if (type == BTRFS_SHARED_DATA_REF_KEY)
1758 return sizeof(struct btrfs_shared_data_ref) +
1759 sizeof(struct btrfs_extent_inline_ref);
1760 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1761 return sizeof(struct btrfs_extent_data_ref) +
1762 offsetof(struct btrfs_extent_inline_ref, offset);
1763 BUG();
1764 return 0;
1765}
1766
1767BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1768BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1769 generation, 64);
1770BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1771BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1772
1773
1774BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1775BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1776BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1777 blockptr, 64);
1778BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1779 generation, 64);
1780
1781static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1782{
1783 unsigned long ptr;
1784 ptr = offsetof(struct btrfs_node, ptrs) +
1785 sizeof(struct btrfs_key_ptr) * nr;
1786 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1787}
1788
1789static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1790 int nr, u64 val)
1791{
1792 unsigned long ptr;
1793 ptr = offsetof(struct btrfs_node, ptrs) +
1794 sizeof(struct btrfs_key_ptr) * nr;
1795 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1796}
1797
1798static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1799{
1800 unsigned long ptr;
1801 ptr = offsetof(struct btrfs_node, ptrs) +
1802 sizeof(struct btrfs_key_ptr) * nr;
1803 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1804}
1805
1806static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1807 int nr, u64 val)
1808{
1809 unsigned long ptr;
1810 ptr = offsetof(struct btrfs_node, ptrs) +
1811 sizeof(struct btrfs_key_ptr) * nr;
1812 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1813}
1814
1815static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1816{
1817 return offsetof(struct btrfs_node, ptrs) +
1818 sizeof(struct btrfs_key_ptr) * nr;
1819}
1820
1821void btrfs_node_key(struct extent_buffer *eb,
1822 struct btrfs_disk_key *disk_key, int nr);
1823
1824static inline void btrfs_set_node_key(struct extent_buffer *eb,
1825 struct btrfs_disk_key *disk_key, int nr)
1826{
1827 unsigned long ptr;
1828 ptr = btrfs_node_key_ptr_offset(nr);
1829 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1830 struct btrfs_key_ptr, key, disk_key);
1831}
1832
1833
1834BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1835BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1836BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1837BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1838
1839static inline unsigned long btrfs_item_nr_offset(int nr)
1840{
1841 return offsetof(struct btrfs_leaf, items) +
1842 sizeof(struct btrfs_item) * nr;
1843}
1844
1845static inline struct btrfs_item *btrfs_item_nr(int nr)
1846{
1847 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1848}
1849
1850static inline u32 btrfs_item_end(struct extent_buffer *eb,
1851 struct btrfs_item *item)
1852{
1853 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1854}
1855
1856static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1857{
1858 return btrfs_item_end(eb, btrfs_item_nr(nr));
1859}
1860
1861static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1862{
1863 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1864}
1865
1866static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1867{
1868 return btrfs_item_size(eb, btrfs_item_nr(nr));
1869}
1870
1871static inline void btrfs_item_key(struct extent_buffer *eb,
1872 struct btrfs_disk_key *disk_key, int nr)
1873{
1874 struct btrfs_item *item = btrfs_item_nr(nr);
1875 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1876}
1877
1878static inline void btrfs_set_item_key(struct extent_buffer *eb,
1879 struct btrfs_disk_key *disk_key, int nr)
1880{
1881 struct btrfs_item *item = btrfs_item_nr(nr);
1882 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1883}
1884
1885BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1886
1887
1888
1889
1890BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1891BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1892BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1893
1894
1895BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1896BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1897BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1898BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1899BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1900BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1901 data_len, 16);
1902BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1903 name_len, 16);
1904BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1905 transid, 64);
1906
1907static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1908 struct btrfs_dir_item *item,
1909 struct btrfs_disk_key *key)
1910{
1911 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1912}
1913
1914static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1915 struct btrfs_dir_item *item,
1916 struct btrfs_disk_key *key)
1917{
1918 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1919}
1920
1921BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1922 num_entries, 64);
1923BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1924 num_bitmaps, 64);
1925BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1926 generation, 64);
1927
1928static inline void btrfs_free_space_key(struct extent_buffer *eb,
1929 struct btrfs_free_space_header *h,
1930 struct btrfs_disk_key *key)
1931{
1932 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1933}
1934
1935static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1936 struct btrfs_free_space_header *h,
1937 struct btrfs_disk_key *key)
1938{
1939 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1940}
1941
1942
1943BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1944 objectid, 64);
1945BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1946BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1947
1948static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1949 struct btrfs_disk_key *disk)
1950{
1951 cpu->offset = le64_to_cpu(disk->offset);
1952 cpu->type = disk->type;
1953 cpu->objectid = le64_to_cpu(disk->objectid);
1954}
1955
1956static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1957 struct btrfs_key *cpu)
1958{
1959 disk->offset = cpu_to_le64(cpu->offset);
1960 disk->type = cpu->type;
1961 disk->objectid = cpu_to_le64(cpu->objectid);
1962}
1963
1964static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1965 struct btrfs_key *key, int nr)
1966{
1967 struct btrfs_disk_key disk_key;
1968 btrfs_node_key(eb, &disk_key, nr);
1969 btrfs_disk_key_to_cpu(key, &disk_key);
1970}
1971
1972static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1973 struct btrfs_key *key, int nr)
1974{
1975 struct btrfs_disk_key disk_key;
1976 btrfs_item_key(eb, &disk_key, nr);
1977 btrfs_disk_key_to_cpu(key, &disk_key);
1978}
1979
1980static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1981 struct btrfs_dir_item *item,
1982 struct btrfs_key *key)
1983{
1984 struct btrfs_disk_key disk_key;
1985 btrfs_dir_item_key(eb, item, &disk_key);
1986 btrfs_disk_key_to_cpu(key, &disk_key);
1987}
1988
1989
1990static inline u8 btrfs_key_type(struct btrfs_key *key)
1991{
1992 return key->type;
1993}
1994
1995static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1996{
1997 key->type = val;
1998}
1999
2000
2001BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2002BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2003 generation, 64);
2004BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2005BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2006BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2007BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2008BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2009 generation, 64);
2010BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2011BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2012 nritems, 32);
2013BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2014
2015static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2016{
2017 return (btrfs_header_flags(eb) & flag) == flag;
2018}
2019
2020static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2021{
2022 u64 flags = btrfs_header_flags(eb);
2023 btrfs_set_header_flags(eb, flags | flag);
2024 return (flags & flag) == flag;
2025}
2026
2027static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2028{
2029 u64 flags = btrfs_header_flags(eb);
2030 btrfs_set_header_flags(eb, flags & ~flag);
2031 return (flags & flag) == flag;
2032}
2033
2034static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2035{
2036 u64 flags = btrfs_header_flags(eb);
2037 return flags >> BTRFS_BACKREF_REV_SHIFT;
2038}
2039
2040static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2041 int rev)
2042{
2043 u64 flags = btrfs_header_flags(eb);
2044 flags &= ~BTRFS_BACKREF_REV_MASK;
2045 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2046 btrfs_set_header_flags(eb, flags);
2047}
2048
2049static inline unsigned long btrfs_header_fsid(void)
2050{
2051 return offsetof(struct btrfs_header, fsid);
2052}
2053
2054static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2055{
2056 return offsetof(struct btrfs_header, chunk_tree_uuid);
2057}
2058
2059static inline int btrfs_is_leaf(struct extent_buffer *eb)
2060{
2061 return btrfs_header_level(eb) == 0;
2062}
2063
2064
2065BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2066 generation, 64);
2067BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2068BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2069BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2070
2071BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2072 generation, 64);
2073BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2074BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2075BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2076BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2077BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2078BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2079BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2080BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2081 last_snapshot, 64);
2082BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2083 generation_v2, 64);
2084BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2085 ctransid, 64);
2086BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2087 otransid, 64);
2088BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2089 stransid, 64);
2090BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2091 rtransid, 64);
2092
2093static inline bool btrfs_root_readonly(struct btrfs_root *root)
2094{
2095 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2096}
2097
2098static inline bool btrfs_root_dead(struct btrfs_root *root)
2099{
2100 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2101}
2102
2103
2104BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2105 tree_root, 64);
2106BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2107 tree_root_gen, 64);
2108BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2109 tree_root_level, 8);
2110
2111BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2112 chunk_root, 64);
2113BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2114 chunk_root_gen, 64);
2115BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2116 chunk_root_level, 8);
2117
2118BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2119 extent_root, 64);
2120BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2121 extent_root_gen, 64);
2122BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2123 extent_root_level, 8);
2124
2125BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2126 fs_root, 64);
2127BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2128 fs_root_gen, 64);
2129BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2130 fs_root_level, 8);
2131
2132BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2133 dev_root, 64);
2134BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2135 dev_root_gen, 64);
2136BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2137 dev_root_level, 8);
2138
2139BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2140 csum_root, 64);
2141BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2142 csum_root_gen, 64);
2143BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2144 csum_root_level, 8);
2145BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2146 total_bytes, 64);
2147BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2148 bytes_used, 64);
2149BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2150 num_devices, 64);
2151
2152
2153BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2154
2155static inline void btrfs_balance_data(struct extent_buffer *eb,
2156 struct btrfs_balance_item *bi,
2157 struct btrfs_disk_balance_args *ba)
2158{
2159 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2160}
2161
2162static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2163 struct btrfs_balance_item *bi,
2164 struct btrfs_disk_balance_args *ba)
2165{
2166 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2167}
2168
2169static inline void btrfs_balance_meta(struct extent_buffer *eb,
2170 struct btrfs_balance_item *bi,
2171 struct btrfs_disk_balance_args *ba)
2172{
2173 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2174}
2175
2176static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2177 struct btrfs_balance_item *bi,
2178 struct btrfs_disk_balance_args *ba)
2179{
2180 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2181}
2182
2183static inline void btrfs_balance_sys(struct extent_buffer *eb,
2184 struct btrfs_balance_item *bi,
2185 struct btrfs_disk_balance_args *ba)
2186{
2187 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2188}
2189
2190static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2191 struct btrfs_balance_item *bi,
2192 struct btrfs_disk_balance_args *ba)
2193{
2194 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2195}
2196
2197static inline void
2198btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2199 struct btrfs_disk_balance_args *disk)
2200{
2201 memset(cpu, 0, sizeof(*cpu));
2202
2203 cpu->profiles = le64_to_cpu(disk->profiles);
2204 cpu->usage = le64_to_cpu(disk->usage);
2205 cpu->devid = le64_to_cpu(disk->devid);
2206 cpu->pstart = le64_to_cpu(disk->pstart);
2207 cpu->pend = le64_to_cpu(disk->pend);
2208 cpu->vstart = le64_to_cpu(disk->vstart);
2209 cpu->vend = le64_to_cpu(disk->vend);
2210 cpu->target = le64_to_cpu(disk->target);
2211 cpu->flags = le64_to_cpu(disk->flags);
2212 cpu->limit = le64_to_cpu(disk->limit);
2213}
2214
2215static inline void
2216btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2217 struct btrfs_balance_args *cpu)
2218{
2219 memset(disk, 0, sizeof(*disk));
2220
2221 disk->profiles = cpu_to_le64(cpu->profiles);
2222 disk->usage = cpu_to_le64(cpu->usage);
2223 disk->devid = cpu_to_le64(cpu->devid);
2224 disk->pstart = cpu_to_le64(cpu->pstart);
2225 disk->pend = cpu_to_le64(cpu->pend);
2226 disk->vstart = cpu_to_le64(cpu->vstart);
2227 disk->vend = cpu_to_le64(cpu->vend);
2228 disk->target = cpu_to_le64(cpu->target);
2229 disk->flags = cpu_to_le64(cpu->flags);
2230 disk->limit = cpu_to_le64(cpu->limit);
2231}
2232
2233
2234BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2235BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2236BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2237 generation, 64);
2238BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2239BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2240 struct btrfs_super_block, sys_chunk_array_size, 32);
2241BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2242 struct btrfs_super_block, chunk_root_generation, 64);
2243BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2244 root_level, 8);
2245BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2246 chunk_root, 64);
2247BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2248 chunk_root_level, 8);
2249BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2250 log_root, 64);
2251BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2252 log_root_transid, 64);
2253BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2254 log_root_level, 8);
2255BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2256 total_bytes, 64);
2257BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2258 bytes_used, 64);
2259BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2260 sectorsize, 32);
2261BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2262 nodesize, 32);
2263BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2264 stripesize, 32);
2265BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2266 root_dir_objectid, 64);
2267BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2268 num_devices, 64);
2269BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2270 compat_flags, 64);
2271BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2272 compat_ro_flags, 64);
2273BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2274 incompat_flags, 64);
2275BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2276 csum_type, 16);
2277BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2278 cache_generation, 64);
2279BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2280BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2281 uuid_tree_generation, 64);
2282
2283static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2284{
2285 u16 t = btrfs_super_csum_type(s);
2286
2287
2288
2289 return btrfs_csum_sizes[t];
2290}
2291
2292static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2293{
2294 return offsetof(struct btrfs_leaf, items);
2295}
2296
2297
2298
2299
2300
2301
2302static inline unsigned int leaf_data_end(struct btrfs_root *root,
2303 struct extent_buffer *leaf)
2304{
2305 u32 nr = btrfs_header_nritems(leaf);
2306
2307 if (nr == 0)
2308 return BTRFS_LEAF_DATA_SIZE(root);
2309 return btrfs_item_offset_nr(leaf, nr - 1);
2310}
2311
2312
2313BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2314BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2315 struct btrfs_file_extent_item, disk_bytenr, 64);
2316BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2317 struct btrfs_file_extent_item, offset, 64);
2318BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2319 struct btrfs_file_extent_item, generation, 64);
2320BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2321 struct btrfs_file_extent_item, num_bytes, 64);
2322BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2323 struct btrfs_file_extent_item, disk_num_bytes, 64);
2324BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2325 struct btrfs_file_extent_item, compression, 8);
2326
2327static inline unsigned long
2328btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2329{
2330 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2331}
2332
2333static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2334{
2335 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2336}
2337
2338BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2339 disk_bytenr, 64);
2340BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2341 generation, 64);
2342BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2343 disk_num_bytes, 64);
2344BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2345 offset, 64);
2346BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2347 num_bytes, 64);
2348BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2349 ram_bytes, 64);
2350BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2351 compression, 8);
2352BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2353 encryption, 8);
2354BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2355 other_encoding, 16);
2356
2357
2358
2359
2360
2361
2362static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2363 struct btrfs_item *e)
2364{
2365 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2366}
2367
2368
2369
2370
2371static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2372 int slot,
2373 struct btrfs_file_extent_item *fi)
2374{
2375 struct btrfs_map_token token;
2376
2377 btrfs_init_map_token(&token);
2378
2379
2380
2381
2382 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
2383 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
2384 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
2385 return btrfs_file_extent_inline_item_len(eb,
2386 btrfs_item_nr(slot));
2387 }
2388
2389
2390 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
2391}
2392
2393
2394
2395static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2396 struct btrfs_dev_stats_item *ptr,
2397 int index)
2398{
2399 u64 val;
2400
2401 read_extent_buffer(eb, &val,
2402 offsetof(struct btrfs_dev_stats_item, values) +
2403 ((unsigned long)ptr) + (index * sizeof(u64)),
2404 sizeof(val));
2405 return val;
2406}
2407
2408static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2409 struct btrfs_dev_stats_item *ptr,
2410 int index, u64 val)
2411{
2412 write_extent_buffer(eb, &val,
2413 offsetof(struct btrfs_dev_stats_item, values) +
2414 ((unsigned long)ptr) + (index * sizeof(u64)),
2415 sizeof(val));
2416}
2417
2418
2419BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2420 generation, 64);
2421BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2422 version, 64);
2423BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2424 flags, 64);
2425BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2426 rescan, 64);
2427
2428
2429BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2430 generation, 64);
2431BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2432BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2433 rfer_cmpr, 64);
2434BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2435BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2436 excl_cmpr, 64);
2437
2438BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2439 struct btrfs_qgroup_info_item, generation, 64);
2440BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2441 rfer, 64);
2442BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2443 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2444BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2445 excl, 64);
2446BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2447 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2448
2449
2450BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2451 flags, 64);
2452BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2453 max_rfer, 64);
2454BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2455 max_excl, 64);
2456BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2457 rsv_rfer, 64);
2458BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2459 rsv_excl, 64);
2460
2461
2462BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2463 struct btrfs_dev_replace_item, src_devid, 64);
2464BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2465 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2466 64);
2467BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2468 replace_state, 64);
2469BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2470 time_started, 64);
2471BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2472 time_stopped, 64);
2473BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2474 num_write_errors, 64);
2475BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2476 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2477 64);
2478BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2479 cursor_left, 64);
2480BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2481 cursor_right, 64);
2482
2483BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2484 struct btrfs_dev_replace_item, src_devid, 64);
2485BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2486 struct btrfs_dev_replace_item,
2487 cont_reading_from_srcdev_mode, 64);
2488BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2489 struct btrfs_dev_replace_item, replace_state, 64);
2490BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2491 struct btrfs_dev_replace_item, time_started, 64);
2492BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2493 struct btrfs_dev_replace_item, time_stopped, 64);
2494BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2495 struct btrfs_dev_replace_item, num_write_errors, 64);
2496BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2497 struct btrfs_dev_replace_item,
2498 num_uncorrectable_read_errors, 64);
2499BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2500 struct btrfs_dev_replace_item, cursor_left, 64);
2501BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2502 struct btrfs_dev_replace_item, cursor_right, 64);
2503
2504static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
2505{
2506 return sb->s_fs_info;
2507}
2508
2509
2510#define btrfs_item_ptr(leaf, slot, type) \
2511 ((type *)(btrfs_leaf_data(leaf) + \
2512 btrfs_item_offset_nr(leaf, slot)))
2513
2514#define btrfs_item_ptr_offset(leaf, slot) \
2515 ((unsigned long)(btrfs_leaf_data(leaf) + \
2516 btrfs_item_offset_nr(leaf, slot)))
2517
2518static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2519{
2520 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2521 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2522}
2523
2524static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2525{
2526 return mapping_gfp_mask(mapping) & ~__GFP_FS;
2527}
2528
2529
2530
2531u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);
2532
2533static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2534 unsigned num_items)
2535{
2536 return root->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2537}
2538
2539
2540
2541
2542
2543static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2544 unsigned num_items)
2545{
2546 return root->nodesize * BTRFS_MAX_LEVEL * num_items;
2547}
2548
2549int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
2550 struct btrfs_root *root);
2551int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
2552 struct btrfs_root *root);
2553void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2554 const u64 start);
2555void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2556bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2557void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2558void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2559void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2560int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2561 struct btrfs_root *root, unsigned long count);
2562int btrfs_async_run_delayed_refs(struct btrfs_root *root,
2563 unsigned long count, u64 transid, int wait);
2564int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
2565int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2566 struct btrfs_root *root, u64 bytenr,
2567 u64 offset, int metadata, u64 *refs, u64 *flags);
2568int btrfs_pin_extent(struct btrfs_root *root,
2569 u64 bytenr, u64 num, int reserved);
2570int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
2571 u64 bytenr, u64 num_bytes);
2572int btrfs_exclude_logged_extents(struct btrfs_root *root,
2573 struct extent_buffer *eb);
2574int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2575 struct btrfs_root *root,
2576 u64 objectid, u64 offset, u64 bytenr);
2577struct btrfs_block_group_cache *btrfs_lookup_block_group(
2578 struct btrfs_fs_info *info,
2579 u64 bytenr);
2580void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2581void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2582int get_block_group_index(struct btrfs_block_group_cache *cache);
2583struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2584 struct btrfs_root *root, u64 parent,
2585 u64 root_objectid,
2586 struct btrfs_disk_key *key, int level,
2587 u64 hint, u64 empty_size);
2588void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2589 struct btrfs_root *root,
2590 struct extent_buffer *buf,
2591 u64 parent, int last_ref);
2592int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2593 struct btrfs_root *root,
2594 u64 root_objectid, u64 owner,
2595 u64 offset, u64 ram_bytes,
2596 struct btrfs_key *ins);
2597int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2598 struct btrfs_root *root,
2599 u64 root_objectid, u64 owner, u64 offset,
2600 struct btrfs_key *ins);
2601int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2602 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2603 struct btrfs_key *ins, int is_data, int delalloc);
2604int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2605 struct extent_buffer *buf, int full_backref);
2606int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2607 struct extent_buffer *buf, int full_backref);
2608int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2609 struct btrfs_root *root,
2610 u64 bytenr, u64 num_bytes, u64 flags,
2611 int level, int is_data);
2612int btrfs_free_extent(struct btrfs_trans_handle *trans,
2613 struct btrfs_root *root,
2614 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2615 u64 owner, u64 offset);
2616
2617int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
2618 int delalloc);
2619int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2620 u64 start, u64 len);
2621void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2622 struct btrfs_root *root);
2623int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2624 struct btrfs_root *root);
2625int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2626 struct btrfs_root *root,
2627 u64 bytenr, u64 num_bytes, u64 parent,
2628 u64 root_objectid, u64 owner, u64 offset);
2629
2630int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
2631 struct btrfs_root *root);
2632int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2633 struct btrfs_root *root);
2634int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2635 struct btrfs_root *root);
2636int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2637int btrfs_free_block_groups(struct btrfs_fs_info *info);
2638int btrfs_read_block_groups(struct btrfs_root *root);
2639int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2640int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2641 struct btrfs_root *root, u64 bytes_used,
2642 u64 type, u64 chunk_objectid, u64 chunk_offset,
2643 u64 size);
2644struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2645 struct btrfs_fs_info *fs_info,
2646 const u64 chunk_offset);
2647int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2648 struct btrfs_root *root, u64 group_start,
2649 struct extent_map *em);
2650void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2651void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2652void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2653void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
2654 struct btrfs_root *root);
2655u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2656void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2657
2658enum btrfs_reserve_flush_enum {
2659
2660 BTRFS_RESERVE_NO_FLUSH,
2661
2662
2663
2664
2665 BTRFS_RESERVE_FLUSH_LIMIT,
2666 BTRFS_RESERVE_FLUSH_ALL,
2667};
2668
2669enum btrfs_flush_state {
2670 FLUSH_DELAYED_ITEMS_NR = 1,
2671 FLUSH_DELAYED_ITEMS = 2,
2672 FLUSH_DELALLOC = 3,
2673 FLUSH_DELALLOC_WAIT = 4,
2674 ALLOC_CHUNK = 5,
2675 COMMIT_TRANS = 6,
2676};
2677
2678int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len);
2679int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes);
2680void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len);
2681void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2682 u64 len);
2683void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2684 struct btrfs_root *root);
2685void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2686int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2687 struct inode *inode);
2688void btrfs_orphan_release_metadata(struct inode *inode);
2689int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2690 struct btrfs_block_rsv *rsv,
2691 int nitems,
2692 u64 *qgroup_reserved, bool use_global_rsv);
2693void btrfs_subvolume_release_metadata(struct btrfs_root *root,
2694 struct btrfs_block_rsv *rsv,
2695 u64 qgroup_reserved);
2696int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2697void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2698int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len);
2699void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len);
2700void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2701struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
2702 unsigned short type);
2703void btrfs_free_block_rsv(struct btrfs_root *root,
2704 struct btrfs_block_rsv *rsv);
2705void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
2706int btrfs_block_rsv_add(struct btrfs_root *root,
2707 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2708 enum btrfs_reserve_flush_enum flush);
2709int btrfs_block_rsv_check(struct btrfs_root *root,
2710 struct btrfs_block_rsv *block_rsv, int min_factor);
2711int btrfs_block_rsv_refill(struct btrfs_root *root,
2712 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2713 enum btrfs_reserve_flush_enum flush);
2714int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2715 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2716 int update_size);
2717int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2718 struct btrfs_block_rsv *dest, u64 num_bytes,
2719 int min_factor);
2720void btrfs_block_rsv_release(struct btrfs_root *root,
2721 struct btrfs_block_rsv *block_rsv,
2722 u64 num_bytes);
2723int btrfs_inc_block_group_ro(struct btrfs_root *root,
2724 struct btrfs_block_group_cache *cache);
2725void btrfs_dec_block_group_ro(struct btrfs_root *root,
2726 struct btrfs_block_group_cache *cache);
2727void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2728u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2729int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2730 u64 start, u64 end);
2731int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
2732 u64 num_bytes, u64 *actual_bytes);
2733int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2734 struct btrfs_root *root, u64 type);
2735int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2736
2737int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2738int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2739 struct btrfs_fs_info *fs_info);
2740int __get_raid_index(u64 flags);
2741int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
2742void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
2743void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2744void check_system_chunk(struct btrfs_trans_handle *trans,
2745 struct btrfs_root *root,
2746 const u64 type);
2747u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2748 struct btrfs_fs_info *info, u64 start, u64 end);
2749
2750
2751int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2752 int level, int *slot);
2753int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2754int btrfs_previous_item(struct btrfs_root *root,
2755 struct btrfs_path *path, u64 min_objectid,
2756 int type);
2757int btrfs_previous_extent_item(struct btrfs_root *root,
2758 struct btrfs_path *path, u64 min_objectid);
2759void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2760 struct btrfs_path *path,
2761 struct btrfs_key *new_key);
2762struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2763struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2764int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2765 struct btrfs_key *key, int lowest_level,
2766 u64 min_trans);
2767int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2768 struct btrfs_path *path,
2769 u64 min_trans);
2770enum btrfs_compare_tree_result {
2771 BTRFS_COMPARE_TREE_NEW,
2772 BTRFS_COMPARE_TREE_DELETED,
2773 BTRFS_COMPARE_TREE_CHANGED,
2774 BTRFS_COMPARE_TREE_SAME,
2775};
2776typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
2777 struct btrfs_root *right_root,
2778 struct btrfs_path *left_path,
2779 struct btrfs_path *right_path,
2780 struct btrfs_key *key,
2781 enum btrfs_compare_tree_result result,
2782 void *ctx);
2783int btrfs_compare_trees(struct btrfs_root *left_root,
2784 struct btrfs_root *right_root,
2785 btrfs_changed_cb_t cb, void *ctx);
2786int btrfs_cow_block(struct btrfs_trans_handle *trans,
2787 struct btrfs_root *root, struct extent_buffer *buf,
2788 struct extent_buffer *parent, int parent_slot,
2789 struct extent_buffer **cow_ret);
2790int btrfs_copy_root(struct btrfs_trans_handle *trans,
2791 struct btrfs_root *root,
2792 struct extent_buffer *buf,
2793 struct extent_buffer **cow_ret, u64 new_root_objectid);
2794int btrfs_block_can_be_shared(struct btrfs_root *root,
2795 struct extent_buffer *buf);
2796void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
2797 u32 data_size);
2798void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
2799 u32 new_size, int from_end);
2800int btrfs_split_item(struct btrfs_trans_handle *trans,
2801 struct btrfs_root *root,
2802 struct btrfs_path *path,
2803 struct btrfs_key *new_key,
2804 unsigned long split_offset);
2805int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2806 struct btrfs_root *root,
2807 struct btrfs_path *path,
2808 struct btrfs_key *new_key);
2809int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2810 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2811int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2812 *root, struct btrfs_key *key, struct btrfs_path *p, int
2813 ins_len, int cow);
2814int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
2815 struct btrfs_path *p, u64 time_seq);
2816int btrfs_search_slot_for_read(struct btrfs_root *root,
2817 struct btrfs_key *key, struct btrfs_path *p,
2818 int find_higher, int return_any);
2819int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2820 struct btrfs_root *root, struct extent_buffer *parent,
2821 int start_slot, u64 *last_ret,
2822 struct btrfs_key *progress);
2823void btrfs_release_path(struct btrfs_path *p);
2824struct btrfs_path *btrfs_alloc_path(void);
2825void btrfs_free_path(struct btrfs_path *p);
2826void btrfs_set_path_blocking(struct btrfs_path *p);
2827void btrfs_clear_path_blocking(struct btrfs_path *p,
2828 struct extent_buffer *held, int held_rw);
2829void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2830
2831int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2832 struct btrfs_path *path, int slot, int nr);
2833static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2834 struct btrfs_root *root,
2835 struct btrfs_path *path)
2836{
2837 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2838}
2839
2840void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2841 struct btrfs_key *cpu_key, u32 *data_size,
2842 u32 total_data, u32 total_size, int nr);
2843int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2844 *root, struct btrfs_key *key, void *data, u32 data_size);
2845int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2846 struct btrfs_root *root,
2847 struct btrfs_path *path,
2848 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2849
2850static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2851 struct btrfs_root *root,
2852 struct btrfs_path *path,
2853 struct btrfs_key *key,
2854 u32 data_size)
2855{
2856 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2857}
2858
2859int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2860int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2861int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2862 u64 time_seq);
2863static inline int btrfs_next_old_item(struct btrfs_root *root,
2864 struct btrfs_path *p, u64 time_seq)
2865{
2866 ++p->slots[0];
2867 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2868 return btrfs_next_old_leaf(root, p, time_seq);
2869 return 0;
2870}
2871static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2872{
2873 return btrfs_next_old_item(root, p, 0);
2874}
2875int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2876int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2877 struct btrfs_block_rsv *block_rsv,
2878 int update_ref, int for_reloc);
2879int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2880 struct btrfs_root *root,
2881 struct extent_buffer *node,
2882 struct extent_buffer *parent);
2883static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2884{
2885
2886
2887
2888 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2889 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2890 return 2;
2891 return 1;
2892 }
2893 return 0;
2894}
2895
2896
2897
2898
2899
2900
2901static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
2902{
2903 return (root->fs_info->sb->s_flags & MS_RDONLY ||
2904 btrfs_fs_closing(root->fs_info));
2905}
2906
2907static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2908{
2909 kfree(fs_info->balance_ctl);
2910 kfree(fs_info->delayed_root);
2911 kfree(fs_info->extent_root);
2912 kfree(fs_info->tree_root);
2913 kfree(fs_info->chunk_root);
2914 kfree(fs_info->dev_root);
2915 kfree(fs_info->csum_root);
2916 kfree(fs_info->quota_root);
2917 kfree(fs_info->uuid_root);
2918 kfree(fs_info->free_space_root);
2919 kfree(fs_info->super_copy);
2920 kfree(fs_info->super_for_commit);
2921 security_free_mnt_opts(&fs_info->security_opts);
2922 kfree(fs_info);
2923}
2924
2925
2926u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2927 struct seq_list *elem);
2928void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2929 struct seq_list *elem);
2930int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2931
2932
2933int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2934 struct btrfs_root *tree_root,
2935 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2936 const char *name, int name_len);
2937int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2938 struct btrfs_root *tree_root,
2939 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2940 const char *name, int name_len);
2941int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2942 struct btrfs_key *key);
2943int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2944 *root, struct btrfs_key *key, struct btrfs_root_item
2945 *item);
2946int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2947 struct btrfs_root *root,
2948 struct btrfs_key *key,
2949 struct btrfs_root_item *item);
2950int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
2951 struct btrfs_path *path, struct btrfs_root_item *root_item,
2952 struct btrfs_key *root_key);
2953int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2954void btrfs_set_root_node(struct btrfs_root_item *item,
2955 struct extent_buffer *node);
2956void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2957void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2958 struct btrfs_root *root);
2959
2960
2961int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
2962 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
2963 u64 subid);
2964int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
2965 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
2966 u64 subid);
2967int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
2968 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
2969 u64));
2970
2971
2972int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2973 const char *name, int name_len);
2974int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2975 struct btrfs_root *root, const char *name,
2976 int name_len, struct inode *dir,
2977 struct btrfs_key *location, u8 type, u64 index);
2978struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2979 struct btrfs_root *root,
2980 struct btrfs_path *path, u64 dir,
2981 const char *name, int name_len,
2982 int mod);
2983struct btrfs_dir_item *
2984btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2985 struct btrfs_root *root,
2986 struct btrfs_path *path, u64 dir,
2987 u64 objectid, const char *name, int name_len,
2988 int mod);
2989struct btrfs_dir_item *
2990btrfs_search_dir_index_item(struct btrfs_root *root,
2991 struct btrfs_path *path, u64 dirid,
2992 const char *name, int name_len);
2993int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2994 struct btrfs_root *root,
2995 struct btrfs_path *path,
2996 struct btrfs_dir_item *di);
2997int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2998 struct btrfs_root *root,
2999 struct btrfs_path *path, u64 objectid,
3000 const char *name, u16 name_len,
3001 const void *data, u16 data_len);
3002struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3003 struct btrfs_root *root,
3004 struct btrfs_path *path, u64 dir,
3005 const char *name, u16 name_len,
3006 int mod);
3007int verify_dir_item(struct btrfs_root *root,
3008 struct extent_buffer *leaf,
3009 struct btrfs_dir_item *dir_item);
3010struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3011 struct btrfs_path *path,
3012 const char *name,
3013 int name_len);
3014
3015
3016int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3017 struct btrfs_root *root, u64 offset);
3018int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3019 struct btrfs_root *root, u64 offset);
3020int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3021
3022
3023int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3024 struct btrfs_root *root,
3025 const char *name, int name_len,
3026 u64 inode_objectid, u64 ref_objectid, u64 index);
3027int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3028 struct btrfs_root *root,
3029 const char *name, int name_len,
3030 u64 inode_objectid, u64 ref_objectid, u64 *index);
3031int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3032 struct btrfs_root *root,
3033 struct btrfs_path *path, u64 objectid);
3034int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3035 *root, struct btrfs_path *path,
3036 struct btrfs_key *location, int mod);
3037
3038struct btrfs_inode_extref *
3039btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3040 struct btrfs_root *root,
3041 struct btrfs_path *path,
3042 const char *name, int name_len,
3043 u64 inode_objectid, u64 ref_objectid, int ins_len,
3044 int cow);
3045
3046int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3047 u64 ref_objectid, const char *name,
3048 int name_len,
3049 struct btrfs_inode_extref **extref_ret);
3050
3051
3052struct btrfs_dio_private;
3053int btrfs_del_csums(struct btrfs_trans_handle *trans,
3054 struct btrfs_root *root, u64 bytenr, u64 len);
3055int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3056 struct bio *bio, u32 *dst);
3057int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3058 struct bio *bio, u64 logical_offset);
3059int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3060 struct btrfs_root *root,
3061 u64 objectid, u64 pos,
3062 u64 disk_offset, u64 disk_num_bytes,
3063 u64 num_bytes, u64 offset, u64 ram_bytes,
3064 u8 compression, u8 encryption, u16 other_encoding);
3065int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3066 struct btrfs_root *root,
3067 struct btrfs_path *path, u64 objectid,
3068 u64 bytenr, int mod);
3069int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3070 struct btrfs_root *root,
3071 struct btrfs_ordered_sum *sums);
3072int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3073 struct bio *bio, u64 file_start, int contig);
3074int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3075 struct list_head *list, int search_commit);
3076void btrfs_extent_item_to_extent_map(struct inode *inode,
3077 const struct btrfs_path *path,
3078 struct btrfs_file_extent_item *fi,
3079 const bool new_inline,
3080 struct extent_map *em);
3081
3082
3083struct btrfs_delalloc_work {
3084 struct inode *inode;
3085 int delay_iput;
3086 struct completion completion;
3087 struct list_head list;
3088 struct btrfs_work work;
3089};
3090
3091struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3092 int delay_iput);
3093void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3094
3095struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3096 size_t pg_offset, u64 start, u64 len,
3097 int create);
3098noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3099 u64 *orig_start, u64 *orig_block_len,
3100 u64 *ram_bytes);
3101
3102
3103#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3104#define ClearPageChecked ClearPageFsMisc
3105#define SetPageChecked SetPageFsMisc
3106#define PageChecked PageFsMisc
3107#endif
3108
3109
3110static inline void btrfs_force_ra(struct address_space *mapping,
3111 struct file_ra_state *ra, struct file *file,
3112 pgoff_t offset, unsigned long req_size)
3113{
3114 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3115}
3116
3117struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3118int btrfs_set_inode_index(struct inode *dir, u64 *index);
3119int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3120 struct btrfs_root *root,
3121 struct inode *dir, struct inode *inode,
3122 const char *name, int name_len);
3123int btrfs_add_link(struct btrfs_trans_handle *trans,
3124 struct inode *parent_inode, struct inode *inode,
3125 const char *name, int name_len, int add_backref, u64 index);
3126int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3127 struct btrfs_root *root,
3128 struct inode *dir, u64 objectid,
3129 const char *name, int name_len);
3130int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3131 int front);
3132int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3133 struct btrfs_root *root,
3134 struct inode *inode, u64 new_size,
3135 u32 min_type);
3136
3137int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3138int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3139 int nr);
3140int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3141 struct extent_state **cached_state, int dedupe);
3142int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3143 struct btrfs_root *new_root,
3144 struct btrfs_root *parent_root,
3145 u64 new_dirid);
3146int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3147 size_t size, struct bio *bio,
3148 unsigned long bio_flags);
3149int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3150int btrfs_readpage(struct file *file, struct page *page);
3151void btrfs_evict_inode(struct inode *inode);
3152int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3153struct inode *btrfs_alloc_inode(struct super_block *sb);
3154void btrfs_destroy_inode(struct inode *inode);
3155int btrfs_drop_inode(struct inode *inode);
3156int btrfs_init_cachep(void);
3157void btrfs_destroy_cachep(void);
3158long btrfs_ioctl_trans_end(struct file *file);
3159struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3160 struct btrfs_root *root, int *was_new);
3161struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3162 size_t pg_offset, u64 start, u64 end,
3163 int create);
3164int btrfs_update_inode(struct btrfs_trans_handle *trans,
3165 struct btrfs_root *root,
3166 struct inode *inode);
3167int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3168 struct btrfs_root *root, struct inode *inode);
3169int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3170int btrfs_orphan_cleanup(struct btrfs_root *root);
3171void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3172 struct btrfs_root *root);
3173int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3174void btrfs_invalidate_inodes(struct btrfs_root *root);
3175void btrfs_add_delayed_iput(struct inode *inode);
3176void btrfs_run_delayed_iputs(struct btrfs_root *root);
3177int btrfs_prealloc_file_range(struct inode *inode, int mode,
3178 u64 start, u64 num_bytes, u64 min_size,
3179 loff_t actual_len, u64 *alloc_hint);
3180int btrfs_prealloc_file_range_trans(struct inode *inode,
3181 struct btrfs_trans_handle *trans, int mode,
3182 u64 start, u64 num_bytes, u64 min_size,
3183 loff_t actual_len, u64 *alloc_hint);
3184extern const struct dentry_operations btrfs_dentry_operations;
3185#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3186void btrfs_test_inode_set_ops(struct inode *inode);
3187#endif
3188
3189
3190long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3191long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3192int btrfs_ioctl_get_supported_features(void __user *arg);
3193void btrfs_update_iflags(struct inode *inode);
3194void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3195int btrfs_is_empty_uuid(u8 *uuid);
3196int btrfs_defrag_file(struct inode *inode, struct file *file,
3197 struct btrfs_ioctl_defrag_range_args *range,
3198 u64 newer_than, unsigned long max_pages);
3199void btrfs_get_block_group_info(struct list_head *groups_list,
3200 struct btrfs_ioctl_space_info *space);
3201void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3202 struct btrfs_ioctl_balance_args *bargs);
3203
3204
3205int btrfs_auto_defrag_init(void);
3206void btrfs_auto_defrag_exit(void);
3207int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3208 struct inode *inode);
3209int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3210void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3211int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3212void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3213 int skip_pinned);
3214extern const struct file_operations_extend btrfs_file_operations;
3215int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3216 struct btrfs_root *root, struct inode *inode,
3217 struct btrfs_path *path, u64 start, u64 end,
3218 u64 *drop_end, int drop_cache,
3219 int replace_extent,
3220 u32 extent_item_size,
3221 int *key_inserted);
3222int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3223 struct btrfs_root *root, struct inode *inode, u64 start,
3224 u64 end, int drop_cache);
3225int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3226 struct inode *inode, u64 start, u64 end);
3227int btrfs_release_file(struct inode *inode, struct file *file);
3228int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3229 struct page **pages, size_t num_pages,
3230 loff_t pos, size_t write_bytes,
3231 struct extent_state **cached);
3232int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3233ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in,
3234 struct file *file_out, loff_t pos_out,
3235 size_t len, unsigned int flags);
3236int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
3237 struct file *file_out, loff_t pos_out, u64 len);
3238
3239
3240int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3241 struct btrfs_root *root);
3242
3243
3244int btrfs_init_sysfs(void);
3245void btrfs_exit_sysfs(void);
3246int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3247void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3248
3249
3250ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3251
3252
3253int btrfs_parse_options(struct btrfs_root *root, char *options,
3254 unsigned long new_flags);
3255int btrfs_sync_fs(struct super_block *sb, int wait);
3256
3257static inline __printf(2, 3)
3258void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3259{
3260}
3261
3262#ifdef CONFIG_PRINTK
3263__printf(2, 3)
3264void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3265#else
3266#define btrfs_printk(fs_info, fmt, args...) \
3267 btrfs_no_printk(fs_info, fmt, ##args)
3268#endif
3269
3270#define btrfs_emerg(fs_info, fmt, args...) \
3271 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3272#define btrfs_alert(fs_info, fmt, args...) \
3273 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3274#define btrfs_crit(fs_info, fmt, args...) \
3275 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3276#define btrfs_err(fs_info, fmt, args...) \
3277 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3278#define btrfs_warn(fs_info, fmt, args...) \
3279 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3280#define btrfs_notice(fs_info, fmt, args...) \
3281 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3282#define btrfs_info(fs_info, fmt, args...) \
3283 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3284
3285
3286
3287
3288#define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3289 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3290#define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3291 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3292#define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3293 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3294#define btrfs_err_in_rcu(fs_info, fmt, args...) \
3295 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3296#define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3297 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3298#define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3299 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3300#define btrfs_info_in_rcu(fs_info, fmt, args...) \
3301 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3302
3303
3304
3305
3306#define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3307 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3308#define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3309 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3310#define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3311 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3312#define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3313 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3314#define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3315 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3316#define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3317 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3318#define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3319 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3320
3321
3322
3323
3324#define btrfs_emerg_rl(fs_info, fmt, args...) \
3325 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3326#define btrfs_alert_rl(fs_info, fmt, args...) \
3327 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3328#define btrfs_crit_rl(fs_info, fmt, args...) \
3329 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3330#define btrfs_err_rl(fs_info, fmt, args...) \
3331 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3332#define btrfs_warn_rl(fs_info, fmt, args...) \
3333 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3334#define btrfs_notice_rl(fs_info, fmt, args...) \
3335 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3336#define btrfs_info_rl(fs_info, fmt, args...) \
3337 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3338
3339#if defined(CONFIG_DYNAMIC_DEBUG)
3340#define btrfs_debug(fs_info, fmt, args...) \
3341do { \
3342 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3343 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3344 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3345} while (0)
3346#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3347do { \
3348 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3349 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3350 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3351} while (0)
3352#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3353do { \
3354 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3355 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3356 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3357 ##args);\
3358} while (0)
3359#define btrfs_debug_rl(fs_info, fmt, args...) \
3360do { \
3361 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3362 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3363 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3364 ##args); \
3365} while (0)
3366#elif defined(DEBUG)
3367#define btrfs_debug(fs_info, fmt, args...) \
3368 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3369#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3370 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3371#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3372 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3373#define btrfs_debug_rl(fs_info, fmt, args...) \
3374 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3375#else
3376#define btrfs_debug(fs_info, fmt, args...) \
3377 no_printk(KERN_DEBUG fmt, ##args)
3378#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3379 no_printk(KERN_DEBUG fmt, ##args)
3380#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3381 no_printk(KERN_DEBUG fmt, ##args)
3382#define btrfs_debug_rl(fs_info, fmt, args...) \
3383 no_printk(KERN_DEBUG fmt, ##args)
3384#endif
3385
3386#define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3387do { \
3388 rcu_read_lock(); \
3389 btrfs_printk(fs_info, fmt, ##args); \
3390 rcu_read_unlock(); \
3391} while (0)
3392
3393#define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3394do { \
3395 static DEFINE_RATELIMIT_STATE(_rs, \
3396 DEFAULT_RATELIMIT_INTERVAL, \
3397 DEFAULT_RATELIMIT_BURST); \
3398 if (__ratelimit(&_rs)) \
3399 btrfs_printk(fs_info, fmt, ##args); \
3400} while (0)
3401
3402#define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3403do { \
3404 rcu_read_lock(); \
3405 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3406 rcu_read_unlock(); \
3407} while (0)
3408
3409#ifdef CONFIG_BTRFS_ASSERT
3410
3411__cold
3412static inline void assfail(char *expr, char *file, int line)
3413{
3414 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3415 expr, file, line);
3416 BUG();
3417}
3418
3419#define ASSERT(expr) \
3420 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3421#else
3422#define ASSERT(expr) ((void)0)
3423#endif
3424
3425__printf(5, 6)
3426__cold
3427void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3428 unsigned int line, int errno, const char *fmt, ...);
3429
3430const char *btrfs_decode_error(int errno);
3431
3432__cold
3433void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3434 struct btrfs_root *root, const char *function,
3435 unsigned int line, int errno);
3436
3437
3438
3439
3440
3441#define btrfs_abort_transaction(trans, root, errno) \
3442do { \
3443 \
3444 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3445 &((root)->fs_info->fs_state))) { \
3446 WARN(1, KERN_DEBUG \
3447 "BTRFS: Transaction aborted (error %d)\n", \
3448 (errno)); \
3449 } \
3450 __btrfs_abort_transaction((trans), (root), __func__, \
3451 __LINE__, (errno)); \
3452} while (0)
3453
3454#define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3455do { \
3456 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3457 (errno), fmt, ##args); \
3458} while (0)
3459
3460__printf(5, 6)
3461__cold
3462void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3463 unsigned int line, int errno, const char *fmt, ...);
3464
3465
3466
3467
3468#define btrfs_panic(fs_info, errno, fmt, args...) \
3469do { \
3470 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3471 BUG(); \
3472} while (0)
3473
3474
3475
3476
3477#define btrfs_set_fs_incompat(__fs_info, opt) \
3478 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3479
3480static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3481 u64 flag)
3482{
3483 struct btrfs_super_block *disk_super;
3484 u64 features;
3485
3486 disk_super = fs_info->super_copy;
3487 features = btrfs_super_incompat_flags(disk_super);
3488 if (!(features & flag)) {
3489 spin_lock(&fs_info->super_lock);
3490 features = btrfs_super_incompat_flags(disk_super);
3491 if (!(features & flag)) {
3492 features |= flag;
3493 btrfs_set_super_incompat_flags(disk_super, features);
3494 btrfs_info(fs_info, "setting %llu feature flag",
3495 flag);
3496 }
3497 spin_unlock(&fs_info->super_lock);
3498 }
3499}
3500
3501#define btrfs_clear_fs_incompat(__fs_info, opt) \
3502 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3503
3504static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3505 u64 flag)
3506{
3507 struct btrfs_super_block *disk_super;
3508 u64 features;
3509
3510 disk_super = fs_info->super_copy;
3511 features = btrfs_super_incompat_flags(disk_super);
3512 if (features & flag) {
3513 spin_lock(&fs_info->super_lock);
3514 features = btrfs_super_incompat_flags(disk_super);
3515 if (features & flag) {
3516 features &= ~flag;
3517 btrfs_set_super_incompat_flags(disk_super, features);
3518 btrfs_info(fs_info, "clearing %llu feature flag",
3519 flag);
3520 }
3521 spin_unlock(&fs_info->super_lock);
3522 }
3523}
3524
3525#define btrfs_fs_incompat(fs_info, opt) \
3526 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3527
3528static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3529{
3530 struct btrfs_super_block *disk_super;
3531 disk_super = fs_info->super_copy;
3532 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3533}
3534
3535#define btrfs_set_fs_compat_ro(__fs_info, opt) \
3536 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3537
3538static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3539 u64 flag)
3540{
3541 struct btrfs_super_block *disk_super;
3542 u64 features;
3543
3544 disk_super = fs_info->super_copy;
3545 features = btrfs_super_compat_ro_flags(disk_super);
3546 if (!(features & flag)) {
3547 spin_lock(&fs_info->super_lock);
3548 features = btrfs_super_compat_ro_flags(disk_super);
3549 if (!(features & flag)) {
3550 features |= flag;
3551 btrfs_set_super_compat_ro_flags(disk_super, features);
3552 btrfs_info(fs_info, "setting %llu ro feature flag",
3553 flag);
3554 }
3555 spin_unlock(&fs_info->super_lock);
3556 }
3557}
3558
3559#define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3560 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3561
3562static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3563 u64 flag)
3564{
3565 struct btrfs_super_block *disk_super;
3566 u64 features;
3567
3568 disk_super = fs_info->super_copy;
3569 features = btrfs_super_compat_ro_flags(disk_super);
3570 if (features & flag) {
3571 spin_lock(&fs_info->super_lock);
3572 features = btrfs_super_compat_ro_flags(disk_super);
3573 if (features & flag) {
3574 features &= ~flag;
3575 btrfs_set_super_compat_ro_flags(disk_super, features);
3576 btrfs_info(fs_info, "clearing %llu ro feature flag",
3577 flag);
3578 }
3579 spin_unlock(&fs_info->super_lock);
3580 }
3581}
3582
3583#define btrfs_fs_compat_ro(fs_info, opt) \
3584 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3585
3586static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3587{
3588 struct btrfs_super_block *disk_super;
3589 disk_super = fs_info->super_copy;
3590 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3591}
3592
3593
3594#ifdef CONFIG_BTRFS_FS_POSIX_ACL
3595struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3596int btrfs_init_acl(struct btrfs_trans_handle *trans,
3597 struct inode *inode, struct inode *dir);
3598int btrfs_acl_chmod(struct inode *inode);
3599#else
3600#define btrfs_get_acl NULL
3601static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3602 struct inode *inode, struct inode *dir)
3603{
3604 return 0;
3605}
3606static inline int btrfs_acl_chmod(struct inode *inode)
3607{
3608 return 0;
3609}
3610#endif
3611
3612
3613int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3614int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3615 struct btrfs_root *root);
3616int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3617 struct btrfs_root *root);
3618int btrfs_recover_relocation(struct btrfs_root *root);
3619int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3620int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3621 struct btrfs_root *root, struct extent_buffer *buf,
3622 struct extent_buffer *cow);
3623void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3624 u64 *bytes_to_reserve);
3625int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3626 struct btrfs_pending_snapshot *pending);
3627
3628
3629int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3630 u64 end, struct btrfs_scrub_progress *progress,
3631 int readonly, int is_dev_replace);
3632void btrfs_scrub_pause(struct btrfs_root *root);
3633void btrfs_scrub_continue(struct btrfs_root *root);
3634int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3635int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3636 struct btrfs_device *dev);
3637int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3638 struct btrfs_scrub_progress *progress);
3639
3640
3641void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3642void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3643void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3644
3645static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3646{
3647 btrfs_bio_counter_sub(fs_info, 1);
3648}
3649
3650
3651struct reada_control {
3652 struct btrfs_root *root;
3653 struct btrfs_key key_start;
3654 struct btrfs_key key_end;
3655 atomic_t elems;
3656 struct kref refcnt;
3657 wait_queue_head_t wait;
3658};
3659struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3660 struct btrfs_key *start, struct btrfs_key *end);
3661int btrfs_reada_wait(void *handle);
3662void btrfs_reada_detach(void *handle);
3663int btree_readahead_hook(struct btrfs_fs_info *fs_info,
3664 struct extent_buffer *eb, u64 start, int err);
3665
3666static inline int is_fstree(u64 rootid)
3667{
3668 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3669 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3670 !btrfs_qgroup_level(rootid)))
3671 return 1;
3672 return 0;
3673}
3674
3675static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3676{
3677 return signal_pending(current);
3678}
3679
3680
3681#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3682void btrfs_test_destroy_inode(struct inode *inode);
3683#endif
3684
3685static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3686{
3687#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3688 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
3689 &fs_info->fs_state)))
3690 return 1;
3691#endif
3692 return 0;
3693}
3694#endif
3695