1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_EXTENTS_H
3 #define _BCACHEFS_EXTENTS_H
4
5 #include "bcachefs.h"
6 #include "bkey.h"
7 #include "extents_types.h"
8
9 struct bch_fs;
10 struct btree_trans;
11
12 /* extent entries: */
13
14 #define extent_entry_last(_e) \
15 ((typeof(&(_e).v->start[0])) bkey_val_end(_e))
16
17 #define entry_to_ptr(_entry) \
18 ({ \
19 EBUG_ON((_entry) && !extent_entry_is_ptr(_entry)); \
20 \
21 __builtin_choose_expr( \
22 type_is_exact(_entry, const union bch_extent_entry *), \
23 (const struct bch_extent_ptr *) (_entry), \
24 (struct bch_extent_ptr *) (_entry)); \
25 })
26
27 /* downcast, preserves const */
28 #define to_entry(_entry) \
29 ({ \
30 BUILD_BUG_ON(!type_is(_entry, union bch_extent_crc *) && \
31 !type_is(_entry, struct bch_extent_ptr *) && \
32 !type_is(_entry, struct bch_extent_stripe_ptr *)); \
33 \
34 __builtin_choose_expr( \
35 (type_is_exact(_entry, const union bch_extent_crc *) || \
36 type_is_exact(_entry, const struct bch_extent_ptr *) ||\
37 type_is_exact(_entry, const struct bch_extent_stripe_ptr *)),\
38 (const union bch_extent_entry *) (_entry), \
39 (union bch_extent_entry *) (_entry)); \
40 })
41
42 #define extent_entry_next(_entry) \
43 ((typeof(_entry)) ((void *) (_entry) + extent_entry_bytes(_entry)))
44
45 #define extent_entry_next_safe(_entry, _end) \
46 (likely(__extent_entry_type(_entry) < BCH_EXTENT_ENTRY_MAX) \
47 ? extent_entry_next(_entry) \
48 : _end)
49
50 static inline unsigned
__extent_entry_type(const union bch_extent_entry * e)51 __extent_entry_type(const union bch_extent_entry *e)
52 {
53 return e->type ? __ffs(e->type) : BCH_EXTENT_ENTRY_MAX;
54 }
55
56 static inline enum bch_extent_entry_type
extent_entry_type(const union bch_extent_entry * e)57 extent_entry_type(const union bch_extent_entry *e)
58 {
59 int ret = __ffs(e->type);
60
61 EBUG_ON(ret < 0 || ret >= BCH_EXTENT_ENTRY_MAX);
62
63 return ret;
64 }
65
extent_entry_bytes(const union bch_extent_entry * entry)66 static inline size_t extent_entry_bytes(const union bch_extent_entry *entry)
67 {
68 switch (extent_entry_type(entry)) {
69 #define x(f, n) \
70 case BCH_EXTENT_ENTRY_##f: \
71 return sizeof(struct bch_extent_##f);
72 BCH_EXTENT_ENTRY_TYPES()
73 #undef x
74 default:
75 BUG();
76 }
77 }
78
extent_entry_u64s(const union bch_extent_entry * entry)79 static inline size_t extent_entry_u64s(const union bch_extent_entry *entry)
80 {
81 return extent_entry_bytes(entry) / sizeof(u64);
82 }
83
__extent_entry_insert(struct bkey_i * k,union bch_extent_entry * dst,union bch_extent_entry * new)84 static inline void __extent_entry_insert(struct bkey_i *k,
85 union bch_extent_entry *dst,
86 union bch_extent_entry *new)
87 {
88 union bch_extent_entry *end = bkey_val_end(bkey_i_to_s(k));
89
90 memmove_u64s_up_small((u64 *) dst + extent_entry_u64s(new),
91 dst, (u64 *) end - (u64 *) dst);
92 k->k.u64s += extent_entry_u64s(new);
93 memcpy_u64s_small(dst, new, extent_entry_u64s(new));
94 }
95
extent_entry_drop(struct bkey_s k,union bch_extent_entry * entry)96 static inline void extent_entry_drop(struct bkey_s k, union bch_extent_entry *entry)
97 {
98 union bch_extent_entry *next = extent_entry_next(entry);
99
100 /* stripes have ptrs, but their layout doesn't work with this code */
101 BUG_ON(k.k->type == KEY_TYPE_stripe);
102
103 memmove_u64s_down(entry, next,
104 (u64 *) bkey_val_end(k) - (u64 *) next);
105 k.k->u64s -= (u64 *) next - (u64 *) entry;
106 }
107
extent_entry_is_ptr(const union bch_extent_entry * e)108 static inline bool extent_entry_is_ptr(const union bch_extent_entry *e)
109 {
110 return __extent_entry_type(e) == BCH_EXTENT_ENTRY_ptr;
111 }
112
extent_entry_is_stripe_ptr(const union bch_extent_entry * e)113 static inline bool extent_entry_is_stripe_ptr(const union bch_extent_entry *e)
114 {
115 return __extent_entry_type(e) == BCH_EXTENT_ENTRY_stripe_ptr;
116 }
117
extent_entry_is_crc(const union bch_extent_entry * e)118 static inline bool extent_entry_is_crc(const union bch_extent_entry *e)
119 {
120 switch (__extent_entry_type(e)) {
121 case BCH_EXTENT_ENTRY_crc32:
122 case BCH_EXTENT_ENTRY_crc64:
123 case BCH_EXTENT_ENTRY_crc128:
124 return true;
125 default:
126 return false;
127 }
128 }
129
130 union bch_extent_crc {
131 u8 type;
132 struct bch_extent_crc32 crc32;
133 struct bch_extent_crc64 crc64;
134 struct bch_extent_crc128 crc128;
135 };
136
137 #define __entry_to_crc(_entry) \
138 __builtin_choose_expr( \
139 type_is_exact(_entry, const union bch_extent_entry *), \
140 (const union bch_extent_crc *) (_entry), \
141 (union bch_extent_crc *) (_entry))
142
143 #define entry_to_crc(_entry) \
144 ({ \
145 EBUG_ON((_entry) && !extent_entry_is_crc(_entry)); \
146 \
147 __entry_to_crc(_entry); \
148 })
149
150 static inline struct bch_extent_crc_unpacked
bch2_extent_crc_unpack(const struct bkey * k,const union bch_extent_crc * crc)151 bch2_extent_crc_unpack(const struct bkey *k, const union bch_extent_crc *crc)
152 {
153 #define common_fields(_crc) \
154 .csum_type = _crc.csum_type, \
155 .compression_type = _crc.compression_type, \
156 .compressed_size = _crc._compressed_size + 1, \
157 .uncompressed_size = _crc._uncompressed_size + 1, \
158 .offset = _crc.offset, \
159 .live_size = k->size
160
161 if (!crc)
162 return (struct bch_extent_crc_unpacked) {
163 .compressed_size = k->size,
164 .uncompressed_size = k->size,
165 .live_size = k->size,
166 };
167
168 switch (extent_entry_type(to_entry(crc))) {
169 case BCH_EXTENT_ENTRY_crc32: {
170 struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
171 common_fields(crc->crc32),
172 };
173
174 *((__le32 *) &ret.csum.lo) = (__le32 __force) crc->crc32.csum;
175 return ret;
176 }
177 case BCH_EXTENT_ENTRY_crc64: {
178 struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
179 common_fields(crc->crc64),
180 .nonce = crc->crc64.nonce,
181 .csum.lo = (__force __le64) crc->crc64.csum_lo,
182 };
183
184 *((__le16 *) &ret.csum.hi) = (__le16 __force) crc->crc64.csum_hi;
185
186 return ret;
187 }
188 case BCH_EXTENT_ENTRY_crc128: {
189 struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
190 common_fields(crc->crc128),
191 .nonce = crc->crc128.nonce,
192 .csum = crc->crc128.csum,
193 };
194
195 return ret;
196 }
197 default:
198 BUG();
199 }
200 #undef common_fields
201 }
202
crc_is_compressed(struct bch_extent_crc_unpacked crc)203 static inline bool crc_is_compressed(struct bch_extent_crc_unpacked crc)
204 {
205 return (crc.compression_type != BCH_COMPRESSION_TYPE_none &&
206 crc.compression_type != BCH_COMPRESSION_TYPE_incompressible);
207 }
208
crc_is_encoded(struct bch_extent_crc_unpacked crc)209 static inline bool crc_is_encoded(struct bch_extent_crc_unpacked crc)
210 {
211 return crc.csum_type != BCH_CSUM_none || crc_is_compressed(crc);
212 }
213
214 void bch2_extent_crc_unpacked_to_text(struct printbuf *, struct bch_extent_crc_unpacked *);
215
216 /* bkey_ptrs: generically over any key type that has ptrs */
217
218 struct bkey_ptrs_c {
219 const union bch_extent_entry *start;
220 const union bch_extent_entry *end;
221 };
222
223 struct bkey_ptrs {
224 union bch_extent_entry *start;
225 union bch_extent_entry *end;
226 };
227
bch2_bkey_ptrs_c(struct bkey_s_c k)228 static inline struct bkey_ptrs_c bch2_bkey_ptrs_c(struct bkey_s_c k)
229 {
230 switch (k.k->type) {
231 case KEY_TYPE_btree_ptr: {
232 struct bkey_s_c_btree_ptr e = bkey_s_c_to_btree_ptr(k);
233
234 return (struct bkey_ptrs_c) {
235 to_entry(&e.v->start[0]),
236 to_entry(extent_entry_last(e))
237 };
238 }
239 case KEY_TYPE_extent: {
240 struct bkey_s_c_extent e = bkey_s_c_to_extent(k);
241
242 return (struct bkey_ptrs_c) {
243 e.v->start,
244 extent_entry_last(e)
245 };
246 }
247 case KEY_TYPE_stripe: {
248 struct bkey_s_c_stripe s = bkey_s_c_to_stripe(k);
249
250 return (struct bkey_ptrs_c) {
251 to_entry(&s.v->ptrs[0]),
252 to_entry(&s.v->ptrs[s.v->nr_blocks]),
253 };
254 }
255 case KEY_TYPE_reflink_v: {
256 struct bkey_s_c_reflink_v r = bkey_s_c_to_reflink_v(k);
257
258 return (struct bkey_ptrs_c) {
259 r.v->start,
260 bkey_val_end(r),
261 };
262 }
263 case KEY_TYPE_btree_ptr_v2: {
264 struct bkey_s_c_btree_ptr_v2 e = bkey_s_c_to_btree_ptr_v2(k);
265
266 return (struct bkey_ptrs_c) {
267 to_entry(&e.v->start[0]),
268 to_entry(extent_entry_last(e))
269 };
270 }
271 default:
272 return (struct bkey_ptrs_c) { NULL, NULL };
273 }
274 }
275
bch2_bkey_ptrs(struct bkey_s k)276 static inline struct bkey_ptrs bch2_bkey_ptrs(struct bkey_s k)
277 {
278 struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k.s_c);
279
280 return (struct bkey_ptrs) {
281 (void *) p.start,
282 (void *) p.end
283 };
284 }
285
286 #define __bkey_extent_entry_for_each_from(_start, _end, _entry) \
287 for ((_entry) = (_start); \
288 (_entry) < (_end); \
289 (_entry) = extent_entry_next_safe(_entry, _end))
290
291 #define __bkey_ptr_next(_ptr, _end) \
292 ({ \
293 typeof(_end) _entry; \
294 \
295 __bkey_extent_entry_for_each_from(to_entry(_ptr), _end, _entry) \
296 if (extent_entry_is_ptr(_entry)) \
297 break; \
298 \
299 _entry < (_end) ? entry_to_ptr(_entry) : NULL; \
300 })
301
302 #define bkey_extent_entry_for_each_from(_p, _entry, _start) \
303 __bkey_extent_entry_for_each_from(_start, (_p).end, _entry)
304
305 #define bkey_extent_entry_for_each(_p, _entry) \
306 bkey_extent_entry_for_each_from(_p, _entry, _p.start)
307
308 #define __bkey_for_each_ptr(_start, _end, _ptr) \
309 for (typeof(_start) (_ptr) = (_start); \
310 ((_ptr) = __bkey_ptr_next(_ptr, _end)); \
311 (_ptr)++)
312
313 #define bkey_ptr_next(_p, _ptr) \
314 __bkey_ptr_next(_ptr, (_p).end)
315
316 #define bkey_for_each_ptr(_p, _ptr) \
317 __bkey_for_each_ptr(&(_p).start->ptr, (_p).end, _ptr)
318
319 #define __bkey_ptr_next_decode(_k, _end, _ptr, _entry) \
320 ({ \
321 __label__ out; \
322 \
323 (_ptr).has_ec = false; \
324 (_ptr).do_ec_reconstruct = false; \
325 (_ptr).crc_retry_nr = 0; \
326 \
327 __bkey_extent_entry_for_each_from(_entry, _end, _entry) \
328 switch (__extent_entry_type(_entry)) { \
329 case BCH_EXTENT_ENTRY_ptr: \
330 (_ptr).ptr = _entry->ptr; \
331 goto out; \
332 case BCH_EXTENT_ENTRY_crc32: \
333 case BCH_EXTENT_ENTRY_crc64: \
334 case BCH_EXTENT_ENTRY_crc128: \
335 (_ptr).crc = bch2_extent_crc_unpack(_k, \
336 entry_to_crc(_entry)); \
337 break; \
338 case BCH_EXTENT_ENTRY_stripe_ptr: \
339 (_ptr).ec = _entry->stripe_ptr; \
340 (_ptr).has_ec = true; \
341 break; \
342 default: \
343 /* nothing */ \
344 break; \
345 } \
346 out: \
347 _entry < (_end); \
348 })
349
350 #define __bkey_for_each_ptr_decode(_k, _start, _end, _ptr, _entry) \
351 for ((_ptr).crc = bch2_extent_crc_unpack(_k, NULL), \
352 (_entry) = _start; \
353 __bkey_ptr_next_decode(_k, _end, _ptr, _entry); \
354 (_entry) = extent_entry_next_safe(_entry, _end))
355
356 #define bkey_for_each_ptr_decode(_k, _p, _ptr, _entry) \
357 __bkey_for_each_ptr_decode(_k, (_p).start, (_p).end, \
358 _ptr, _entry)
359
360 #define bkey_crc_next(_k, _end, _crc, _iter) \
361 ({ \
362 __bkey_extent_entry_for_each_from(_iter, _end, _iter) \
363 if (extent_entry_is_crc(_iter)) { \
364 (_crc) = bch2_extent_crc_unpack(_k, \
365 entry_to_crc(_iter)); \
366 break; \
367 } \
368 \
369 (_iter) < (_end); \
370 })
371
372 #define __bkey_for_each_crc(_k, _start, _end, _crc, _iter) \
373 for ((_crc) = bch2_extent_crc_unpack(_k, NULL), \
374 (_iter) = (_start); \
375 bkey_crc_next(_k, _end, _crc, _iter); \
376 (_iter) = extent_entry_next(_iter))
377
378 #define bkey_for_each_crc(_k, _p, _crc, _iter) \
379 __bkey_for_each_crc(_k, (_p).start, (_p).end, _crc, _iter)
380
381 /* Iterate over pointers in KEY_TYPE_extent: */
382
383 #define extent_for_each_entry_from(_e, _entry, _start) \
384 __bkey_extent_entry_for_each_from(_start, \
385 extent_entry_last(_e), _entry)
386
387 #define extent_for_each_entry(_e, _entry) \
388 extent_for_each_entry_from(_e, _entry, (_e).v->start)
389
390 #define extent_ptr_next(_e, _ptr) \
391 __bkey_ptr_next(_ptr, extent_entry_last(_e))
392
393 #define extent_for_each_ptr(_e, _ptr) \
394 __bkey_for_each_ptr(&(_e).v->start->ptr, extent_entry_last(_e), _ptr)
395
396 #define extent_for_each_ptr_decode(_e, _ptr, _entry) \
397 __bkey_for_each_ptr_decode((_e).k, (_e).v->start, \
398 extent_entry_last(_e), _ptr, _entry)
399
400 /* utility code common to all keys with pointers: */
401
402 struct bch_dev_io_failures *bch2_dev_io_failures(struct bch_io_failures *,
403 unsigned);
404 void bch2_mark_io_failure(struct bch_io_failures *,
405 struct extent_ptr_decoded *, bool);
406 int bch2_bkey_pick_read_device(struct bch_fs *, struct bkey_s_c,
407 struct bch_io_failures *,
408 struct extent_ptr_decoded *, int);
409
410 /* KEY_TYPE_btree_ptr: */
411
412 int bch2_btree_ptr_validate(struct bch_fs *, struct bkey_s_c,
413 struct bkey_validate_context);
414 void bch2_btree_ptr_to_text(struct printbuf *, struct bch_fs *,
415 struct bkey_s_c);
416
417 int bch2_btree_ptr_v2_validate(struct bch_fs *, struct bkey_s_c,
418 struct bkey_validate_context);
419 void bch2_btree_ptr_v2_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
420 void bch2_btree_ptr_v2_compat(enum btree_id, unsigned, unsigned,
421 int, struct bkey_s);
422
423 #define bch2_bkey_ops_btree_ptr ((struct bkey_ops) { \
424 .key_validate = bch2_btree_ptr_validate, \
425 .val_to_text = bch2_btree_ptr_to_text, \
426 .swab = bch2_ptr_swab, \
427 .trigger = bch2_trigger_extent, \
428 })
429
430 #define bch2_bkey_ops_btree_ptr_v2 ((struct bkey_ops) { \
431 .key_validate = bch2_btree_ptr_v2_validate, \
432 .val_to_text = bch2_btree_ptr_v2_to_text, \
433 .swab = bch2_ptr_swab, \
434 .compat = bch2_btree_ptr_v2_compat, \
435 .trigger = bch2_trigger_extent, \
436 .min_val_size = 40, \
437 })
438
439 /* KEY_TYPE_extent: */
440
441 bool bch2_extent_merge(struct bch_fs *, struct bkey_s, struct bkey_s_c);
442
443 #define bch2_bkey_ops_extent ((struct bkey_ops) { \
444 .key_validate = bch2_bkey_ptrs_validate, \
445 .val_to_text = bch2_bkey_ptrs_to_text, \
446 .swab = bch2_ptr_swab, \
447 .key_normalize = bch2_extent_normalize, \
448 .key_merge = bch2_extent_merge, \
449 .trigger = bch2_trigger_extent, \
450 })
451
452 /* KEY_TYPE_reservation: */
453
454 int bch2_reservation_validate(struct bch_fs *, struct bkey_s_c,
455 struct bkey_validate_context);
456 void bch2_reservation_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
457 bool bch2_reservation_merge(struct bch_fs *, struct bkey_s, struct bkey_s_c);
458
459 #define bch2_bkey_ops_reservation ((struct bkey_ops) { \
460 .key_validate = bch2_reservation_validate, \
461 .val_to_text = bch2_reservation_to_text, \
462 .key_merge = bch2_reservation_merge, \
463 .trigger = bch2_trigger_reservation, \
464 .min_val_size = 8, \
465 })
466
467 /* Extent checksum entries: */
468
469 bool bch2_can_narrow_extent_crcs(struct bkey_s_c,
470 struct bch_extent_crc_unpacked);
471 bool bch2_bkey_narrow_crcs(struct bkey_i *, struct bch_extent_crc_unpacked);
472 void bch2_extent_crc_append(struct bkey_i *,
473 struct bch_extent_crc_unpacked);
474
475 /* Generic code for keys with pointers: */
476
bkey_is_btree_ptr(const struct bkey * k)477 static inline bool bkey_is_btree_ptr(const struct bkey *k)
478 {
479 switch (k->type) {
480 case KEY_TYPE_btree_ptr:
481 case KEY_TYPE_btree_ptr_v2:
482 return true;
483 default:
484 return false;
485 }
486 }
487
bkey_extent_is_direct_data(const struct bkey * k)488 static inline bool bkey_extent_is_direct_data(const struct bkey *k)
489 {
490 switch (k->type) {
491 case KEY_TYPE_btree_ptr:
492 case KEY_TYPE_btree_ptr_v2:
493 case KEY_TYPE_extent:
494 case KEY_TYPE_reflink_v:
495 return true;
496 default:
497 return false;
498 }
499 }
500
bkey_extent_is_inline_data(const struct bkey * k)501 static inline bool bkey_extent_is_inline_data(const struct bkey *k)
502 {
503 return k->type == KEY_TYPE_inline_data ||
504 k->type == KEY_TYPE_indirect_inline_data;
505 }
506
bkey_inline_data_offset(const struct bkey * k)507 static inline unsigned bkey_inline_data_offset(const struct bkey *k)
508 {
509 switch (k->type) {
510 case KEY_TYPE_inline_data:
511 return sizeof(struct bch_inline_data);
512 case KEY_TYPE_indirect_inline_data:
513 return sizeof(struct bch_indirect_inline_data);
514 default:
515 BUG();
516 }
517 }
518
bkey_inline_data_bytes(const struct bkey * k)519 static inline unsigned bkey_inline_data_bytes(const struct bkey *k)
520 {
521 return bkey_val_bytes(k) - bkey_inline_data_offset(k);
522 }
523
524 #define bkey_inline_data_p(_k) (((void *) (_k).v) + bkey_inline_data_offset((_k).k))
525
bkey_extent_is_data(const struct bkey * k)526 static inline bool bkey_extent_is_data(const struct bkey *k)
527 {
528 return bkey_extent_is_direct_data(k) ||
529 bkey_extent_is_inline_data(k) ||
530 k->type == KEY_TYPE_reflink_p;
531 }
532
533 /*
534 * Should extent be counted under inode->i_sectors?
535 */
bkey_extent_is_allocation(const struct bkey * k)536 static inline bool bkey_extent_is_allocation(const struct bkey *k)
537 {
538 switch (k->type) {
539 case KEY_TYPE_extent:
540 case KEY_TYPE_reservation:
541 case KEY_TYPE_reflink_p:
542 case KEY_TYPE_reflink_v:
543 case KEY_TYPE_inline_data:
544 case KEY_TYPE_indirect_inline_data:
545 case KEY_TYPE_error:
546 return true;
547 default:
548 return false;
549 }
550 }
551
bkey_extent_is_unwritten(struct bkey_s_c k)552 static inline bool bkey_extent_is_unwritten(struct bkey_s_c k)
553 {
554 struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
555
556 bkey_for_each_ptr(ptrs, ptr)
557 if (ptr->unwritten)
558 return true;
559 return false;
560 }
561
bkey_extent_is_reservation(struct bkey_s_c k)562 static inline bool bkey_extent_is_reservation(struct bkey_s_c k)
563 {
564 return k.k->type == KEY_TYPE_reservation ||
565 bkey_extent_is_unwritten(k);
566 }
567
bch2_bkey_devs(struct bkey_s_c k)568 static inline struct bch_devs_list bch2_bkey_devs(struct bkey_s_c k)
569 {
570 struct bch_devs_list ret = (struct bch_devs_list) { 0 };
571 struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
572
573 bkey_for_each_ptr(p, ptr)
574 ret.data[ret.nr++] = ptr->dev;
575
576 return ret;
577 }
578
bch2_bkey_dirty_devs(struct bkey_s_c k)579 static inline struct bch_devs_list bch2_bkey_dirty_devs(struct bkey_s_c k)
580 {
581 struct bch_devs_list ret = (struct bch_devs_list) { 0 };
582 struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
583
584 bkey_for_each_ptr(p, ptr)
585 if (!ptr->cached)
586 ret.data[ret.nr++] = ptr->dev;
587
588 return ret;
589 }
590
bch2_bkey_cached_devs(struct bkey_s_c k)591 static inline struct bch_devs_list bch2_bkey_cached_devs(struct bkey_s_c k)
592 {
593 struct bch_devs_list ret = (struct bch_devs_list) { 0 };
594 struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
595
596 bkey_for_each_ptr(p, ptr)
597 if (ptr->cached)
598 ret.data[ret.nr++] = ptr->dev;
599
600 return ret;
601 }
602
603 unsigned bch2_bkey_nr_ptrs(struct bkey_s_c);
604 unsigned bch2_bkey_nr_ptrs_allocated(struct bkey_s_c);
605 unsigned bch2_bkey_nr_ptrs_fully_allocated(struct bkey_s_c);
606 bool bch2_bkey_is_incompressible(struct bkey_s_c);
607 unsigned bch2_bkey_sectors_compressed(struct bkey_s_c);
608
609 unsigned bch2_bkey_replicas(struct bch_fs *, struct bkey_s_c);
610 unsigned bch2_extent_ptr_desired_durability(struct bch_fs *, struct extent_ptr_decoded *);
611 unsigned bch2_extent_ptr_durability(struct bch_fs *, struct extent_ptr_decoded *);
612 unsigned bch2_bkey_durability(struct bch_fs *, struct bkey_s_c);
613
614 const struct bch_extent_ptr *bch2_bkey_has_device_c(struct bkey_s_c, unsigned);
615
bch2_bkey_has_device(struct bkey_s k,unsigned dev)616 static inline struct bch_extent_ptr *bch2_bkey_has_device(struct bkey_s k, unsigned dev)
617 {
618 return (void *) bch2_bkey_has_device_c(k.s_c, dev);
619 }
620
621 bool bch2_bkey_has_target(struct bch_fs *, struct bkey_s_c, unsigned);
622
623 void bch2_bkey_extent_entry_drop(struct bkey_i *, union bch_extent_entry *);
624
bch2_bkey_append_ptr(struct bkey_i * k,struct bch_extent_ptr ptr)625 static inline void bch2_bkey_append_ptr(struct bkey_i *k, struct bch_extent_ptr ptr)
626 {
627 struct bch_extent_ptr *dest;
628
629 EBUG_ON(bch2_bkey_has_device(bkey_i_to_s(k), ptr.dev));
630
631 switch (k->k.type) {
632 case KEY_TYPE_btree_ptr:
633 case KEY_TYPE_btree_ptr_v2:
634 case KEY_TYPE_extent:
635 EBUG_ON(bkey_val_u64s(&k->k) >= BKEY_EXTENT_VAL_U64s_MAX);
636
637 ptr.type = 1 << BCH_EXTENT_ENTRY_ptr;
638 dest = (struct bch_extent_ptr *)((void *) &k->v + bkey_val_bytes(&k->k));
639 *dest = ptr;
640 k->k.u64s++;
641 break;
642 default:
643 BUG();
644 }
645 }
646
647 void bch2_extent_ptr_decoded_append(struct bkey_i *,
648 struct extent_ptr_decoded *);
649 void bch2_bkey_drop_ptr_noerror(struct bkey_s, struct bch_extent_ptr *);
650 void bch2_bkey_drop_ptr(struct bkey_s, struct bch_extent_ptr *);
651
652 void bch2_bkey_drop_device_noerror(struct bkey_s, unsigned);
653 void bch2_bkey_drop_device(struct bkey_s, unsigned);
654
655 #define bch2_bkey_drop_ptrs_noerror(_k, _ptr, _cond) \
656 do { \
657 __label__ _again; \
658 struct bkey_ptrs _ptrs; \
659 _again: \
660 _ptrs = bch2_bkey_ptrs(_k); \
661 \
662 bkey_for_each_ptr(_ptrs, _ptr) \
663 if (_cond) { \
664 bch2_bkey_drop_ptr_noerror(_k, _ptr); \
665 goto _again; \
666 } \
667 } while (0)
668
669 #define bch2_bkey_drop_ptrs(_k, _ptr, _cond) \
670 do { \
671 __label__ _again; \
672 struct bkey_ptrs _ptrs; \
673 _again: \
674 _ptrs = bch2_bkey_ptrs(_k); \
675 \
676 bkey_for_each_ptr(_ptrs, _ptr) \
677 if (_cond) { \
678 bch2_bkey_drop_ptr(_k, _ptr); \
679 goto _again; \
680 } \
681 } while (0)
682
683 bool bch2_bkey_matches_ptr(struct bch_fs *, struct bkey_s_c,
684 struct bch_extent_ptr, u64);
685 bool bch2_extents_match(struct bkey_s_c, struct bkey_s_c);
686 struct bch_extent_ptr *
687 bch2_extent_has_ptr(struct bkey_s_c, struct extent_ptr_decoded, struct bkey_s);
688
689 void bch2_extent_ptr_set_cached(struct bch_fs *, struct bch_io_opts *,
690 struct bkey_s, struct bch_extent_ptr *);
691
692 bool bch2_extent_normalize_by_opts(struct bch_fs *, struct bch_io_opts *, struct bkey_s);
693 bool bch2_extent_normalize(struct bch_fs *, struct bkey_s);
694
695 void bch2_extent_ptr_to_text(struct printbuf *out, struct bch_fs *, const struct bch_extent_ptr *);
696 void bch2_bkey_ptrs_to_text(struct printbuf *, struct bch_fs *,
697 struct bkey_s_c);
698 int bch2_bkey_ptrs_validate(struct bch_fs *, struct bkey_s_c,
699 struct bkey_validate_context);
700
bch2_extent_ptr_eq(struct bch_extent_ptr ptr1,struct bch_extent_ptr ptr2)701 static inline bool bch2_extent_ptr_eq(struct bch_extent_ptr ptr1,
702 struct bch_extent_ptr ptr2)
703 {
704 return (ptr1.cached == ptr2.cached &&
705 ptr1.unwritten == ptr2.unwritten &&
706 ptr1.offset == ptr2.offset &&
707 ptr1.dev == ptr2.dev &&
708 ptr1.gen == ptr2.gen);
709 }
710
711 void bch2_ptr_swab(struct bkey_s);
712
713 /* Generic extent code: */
714
715 enum bch_extent_overlap {
716 BCH_EXTENT_OVERLAP_ALL = 0,
717 BCH_EXTENT_OVERLAP_BACK = 1,
718 BCH_EXTENT_OVERLAP_FRONT = 2,
719 BCH_EXTENT_OVERLAP_MIDDLE = 3,
720 };
721
722 /* Returns how k overlaps with m */
bch2_extent_overlap(const struct bkey * k,const struct bkey * m)723 static inline enum bch_extent_overlap bch2_extent_overlap(const struct bkey *k,
724 const struct bkey *m)
725 {
726 int cmp1 = bkey_lt(k->p, m->p);
727 int cmp2 = bkey_gt(bkey_start_pos(k), bkey_start_pos(m));
728
729 return (cmp1 << 1) + cmp2;
730 }
731
732 int bch2_cut_front_s(struct bpos, struct bkey_s);
733 int bch2_cut_back_s(struct bpos, struct bkey_s);
734
bch2_cut_front(struct bpos where,struct bkey_i * k)735 static inline void bch2_cut_front(struct bpos where, struct bkey_i *k)
736 {
737 bch2_cut_front_s(where, bkey_i_to_s(k));
738 }
739
bch2_cut_back(struct bpos where,struct bkey_i * k)740 static inline void bch2_cut_back(struct bpos where, struct bkey_i *k)
741 {
742 bch2_cut_back_s(where, bkey_i_to_s(k));
743 }
744
745 /**
746 * bch_key_resize - adjust size of @k
747 *
748 * bkey_start_offset(k) will be preserved, modifies where the extent ends
749 */
bch2_key_resize(struct bkey * k,unsigned new_size)750 static inline void bch2_key_resize(struct bkey *k, unsigned new_size)
751 {
752 k->p.offset -= k->size;
753 k->p.offset += new_size;
754 k->size = new_size;
755 }
756
bch2_bkey_extent_ptrs_flags(struct bkey_ptrs_c ptrs)757 static inline u64 bch2_bkey_extent_ptrs_flags(struct bkey_ptrs_c ptrs)
758 {
759 if (ptrs.start != ptrs.end &&
760 extent_entry_type(ptrs.start) == BCH_EXTENT_ENTRY_flags)
761 return ptrs.start->flags.flags;
762 return 0;
763 }
764
bch2_bkey_extent_flags(struct bkey_s_c k)765 static inline u64 bch2_bkey_extent_flags(struct bkey_s_c k)
766 {
767 return bch2_bkey_extent_ptrs_flags(bch2_bkey_ptrs_c(k));
768 }
769
770 int bch2_bkey_extent_flags_set(struct bch_fs *, struct bkey_i *, u64);
771
772 #endif /* _BCACHEFS_EXTENTS_H */
773