1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_EXTENTS_H
3 #define _BCACHEFS_EXTENTS_H
7 #include "extents_types.h"
11 enum bkey_invalid_flags;
15 #define extent_entry_last(_e) \
16 ((typeof(&(_e).v->start[0])) bkey_val_end(_e))
18 #define entry_to_ptr(_entry) \
20 EBUG_ON((_entry) && !extent_entry_is_ptr(_entry)); \
22 __builtin_choose_expr( \
23 type_is_exact(_entry, const union bch_extent_entry *), \
24 (const struct bch_extent_ptr *) (_entry), \
25 (struct bch_extent_ptr *) (_entry)); \
28 /* downcast, preserves const */
29 #define to_entry(_entry) \
31 BUILD_BUG_ON(!type_is(_entry, union bch_extent_crc *) && \
32 !type_is(_entry, struct bch_extent_ptr *) && \
33 !type_is(_entry, struct bch_extent_stripe_ptr *)); \
35 __builtin_choose_expr( \
36 (type_is_exact(_entry, const union bch_extent_crc *) || \
37 type_is_exact(_entry, const struct bch_extent_ptr *) ||\
38 type_is_exact(_entry, const struct bch_extent_stripe_ptr *)),\
39 (const union bch_extent_entry *) (_entry), \
40 (union bch_extent_entry *) (_entry)); \
43 #define extent_entry_next(_entry) \
44 ((typeof(_entry)) ((void *) (_entry) + extent_entry_bytes(_entry)))
46 static inline unsigned
47 __extent_entry_type(const union bch_extent_entry *e)
49 return e->type ? __ffs(e->type) : BCH_EXTENT_ENTRY_MAX;
52 static inline enum bch_extent_entry_type
53 extent_entry_type(const union bch_extent_entry *e)
55 int ret = __ffs(e->type);
57 EBUG_ON(ret < 0 || ret >= BCH_EXTENT_ENTRY_MAX);
62 static inline size_t extent_entry_bytes(const union bch_extent_entry *entry)
64 switch (extent_entry_type(entry)) {
66 case BCH_EXTENT_ENTRY_##f: \
67 return sizeof(struct bch_extent_##f);
68 BCH_EXTENT_ENTRY_TYPES()
75 static inline size_t extent_entry_u64s(const union bch_extent_entry *entry)
77 return extent_entry_bytes(entry) / sizeof(u64);
80 static inline void __extent_entry_insert(struct bkey_i *k,
81 union bch_extent_entry *dst,
82 union bch_extent_entry *new)
84 union bch_extent_entry *end = bkey_val_end(bkey_i_to_s(k));
86 memmove_u64s_up_small((u64 *) dst + extent_entry_u64s(new),
87 dst, (u64 *) end - (u64 *) dst);
88 k->k.u64s += extent_entry_u64s(new);
89 memcpy_u64s_small(dst, new, extent_entry_u64s(new));
92 static inline void extent_entry_drop(struct bkey_s k, union bch_extent_entry *entry)
94 union bch_extent_entry *next = extent_entry_next(entry);
96 /* stripes have ptrs, but their layout doesn't work with this code */
97 BUG_ON(k.k->type == KEY_TYPE_stripe);
99 memmove_u64s_down(entry, next,
100 (u64 *) bkey_val_end(k) - (u64 *) next);
101 k.k->u64s -= (u64 *) next - (u64 *) entry;
104 static inline bool extent_entry_is_ptr(const union bch_extent_entry *e)
106 return extent_entry_type(e) == BCH_EXTENT_ENTRY_ptr;
109 static inline bool extent_entry_is_stripe_ptr(const union bch_extent_entry *e)
111 return extent_entry_type(e) == BCH_EXTENT_ENTRY_stripe_ptr;
114 static inline bool extent_entry_is_crc(const union bch_extent_entry *e)
116 switch (extent_entry_type(e)) {
117 case BCH_EXTENT_ENTRY_crc32:
118 case BCH_EXTENT_ENTRY_crc64:
119 case BCH_EXTENT_ENTRY_crc128:
126 union bch_extent_crc {
128 struct bch_extent_crc32 crc32;
129 struct bch_extent_crc64 crc64;
130 struct bch_extent_crc128 crc128;
133 #define __entry_to_crc(_entry) \
134 __builtin_choose_expr( \
135 type_is_exact(_entry, const union bch_extent_entry *), \
136 (const union bch_extent_crc *) (_entry), \
137 (union bch_extent_crc *) (_entry))
139 #define entry_to_crc(_entry) \
141 EBUG_ON((_entry) && !extent_entry_is_crc(_entry)); \
143 __entry_to_crc(_entry); \
146 static inline struct bch_extent_crc_unpacked
147 bch2_extent_crc_unpack(const struct bkey *k, const union bch_extent_crc *crc)
149 #define common_fields(_crc) \
150 .csum_type = _crc.csum_type, \
151 .compression_type = _crc.compression_type, \
152 .compressed_size = _crc._compressed_size + 1, \
153 .uncompressed_size = _crc._uncompressed_size + 1, \
154 .offset = _crc.offset, \
158 return (struct bch_extent_crc_unpacked) {
159 .compressed_size = k->size,
160 .uncompressed_size = k->size,
161 .live_size = k->size,
164 switch (extent_entry_type(to_entry(crc))) {
165 case BCH_EXTENT_ENTRY_crc32: {
166 struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
167 common_fields(crc->crc32),
170 *((__le32 *) &ret.csum.lo) = (__le32 __force) crc->crc32.csum;
173 case BCH_EXTENT_ENTRY_crc64: {
174 struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
175 common_fields(crc->crc64),
176 .nonce = crc->crc64.nonce,
177 .csum.lo = (__force __le64) crc->crc64.csum_lo,
180 *((__le16 *) &ret.csum.hi) = (__le16 __force) crc->crc64.csum_hi;
184 case BCH_EXTENT_ENTRY_crc128: {
185 struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
186 common_fields(crc->crc128),
187 .nonce = crc->crc128.nonce,
188 .csum = crc->crc128.csum,
199 static inline bool crc_is_compressed(struct bch_extent_crc_unpacked crc)
201 return (crc.compression_type != BCH_COMPRESSION_TYPE_none &&
202 crc.compression_type != BCH_COMPRESSION_TYPE_incompressible);
205 static inline bool crc_is_encoded(struct bch_extent_crc_unpacked crc)
207 return crc.csum_type != BCH_CSUM_none || crc_is_compressed(crc);
210 /* bkey_ptrs: generically over any key type that has ptrs */
213 const union bch_extent_entry *start;
214 const union bch_extent_entry *end;
218 union bch_extent_entry *start;
219 union bch_extent_entry *end;
222 static inline struct bkey_ptrs_c bch2_bkey_ptrs_c(struct bkey_s_c k)
225 case KEY_TYPE_btree_ptr: {
226 struct bkey_s_c_btree_ptr e = bkey_s_c_to_btree_ptr(k);
228 return (struct bkey_ptrs_c) {
229 to_entry(&e.v->start[0]),
230 to_entry(extent_entry_last(e))
233 case KEY_TYPE_extent: {
234 struct bkey_s_c_extent e = bkey_s_c_to_extent(k);
236 return (struct bkey_ptrs_c) {
241 case KEY_TYPE_stripe: {
242 struct bkey_s_c_stripe s = bkey_s_c_to_stripe(k);
244 return (struct bkey_ptrs_c) {
245 to_entry(&s.v->ptrs[0]),
246 to_entry(&s.v->ptrs[s.v->nr_blocks]),
249 case KEY_TYPE_reflink_v: {
250 struct bkey_s_c_reflink_v r = bkey_s_c_to_reflink_v(k);
252 return (struct bkey_ptrs_c) {
257 case KEY_TYPE_btree_ptr_v2: {
258 struct bkey_s_c_btree_ptr_v2 e = bkey_s_c_to_btree_ptr_v2(k);
260 return (struct bkey_ptrs_c) {
261 to_entry(&e.v->start[0]),
262 to_entry(extent_entry_last(e))
266 return (struct bkey_ptrs_c) { NULL, NULL };
270 static inline struct bkey_ptrs bch2_bkey_ptrs(struct bkey_s k)
272 struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k.s_c);
274 return (struct bkey_ptrs) {
280 #define __bkey_extent_entry_for_each_from(_start, _end, _entry) \
281 for ((_entry) = (_start); \
283 (_entry) = extent_entry_next(_entry))
285 #define __bkey_ptr_next(_ptr, _end) \
287 typeof(_end) _entry; \
289 __bkey_extent_entry_for_each_from(to_entry(_ptr), _end, _entry) \
290 if (extent_entry_is_ptr(_entry)) \
293 _entry < (_end) ? entry_to_ptr(_entry) : NULL; \
296 #define bkey_extent_entry_for_each_from(_p, _entry, _start) \
297 __bkey_extent_entry_for_each_from(_start, (_p).end, _entry)
299 #define bkey_extent_entry_for_each(_p, _entry) \
300 bkey_extent_entry_for_each_from(_p, _entry, _p.start)
302 #define __bkey_for_each_ptr(_start, _end, _ptr) \
303 for (typeof(_start) (_ptr) = (_start); \
304 ((_ptr) = __bkey_ptr_next(_ptr, _end)); \
307 #define bkey_ptr_next(_p, _ptr) \
308 __bkey_ptr_next(_ptr, (_p).end)
310 #define bkey_for_each_ptr(_p, _ptr) \
311 __bkey_for_each_ptr(&(_p).start->ptr, (_p).end, _ptr)
313 #define __bkey_ptr_next_decode(_k, _end, _ptr, _entry) \
318 (_ptr).has_ec = false; \
320 __bkey_extent_entry_for_each_from(_entry, _end, _entry) \
321 switch (extent_entry_type(_entry)) { \
322 case BCH_EXTENT_ENTRY_ptr: \
323 (_ptr).ptr = _entry->ptr; \
325 case BCH_EXTENT_ENTRY_crc32: \
326 case BCH_EXTENT_ENTRY_crc64: \
327 case BCH_EXTENT_ENTRY_crc128: \
328 (_ptr).crc = bch2_extent_crc_unpack(_k, \
329 entry_to_crc(_entry)); \
331 case BCH_EXTENT_ENTRY_stripe_ptr: \
332 (_ptr).ec = _entry->stripe_ptr; \
333 (_ptr).has_ec = true; \
343 #define __bkey_for_each_ptr_decode(_k, _start, _end, _ptr, _entry) \
344 for ((_ptr).crc = bch2_extent_crc_unpack(_k, NULL), \
346 __bkey_ptr_next_decode(_k, _end, _ptr, _entry); \
347 (_entry) = extent_entry_next(_entry))
349 #define bkey_for_each_ptr_decode(_k, _p, _ptr, _entry) \
350 __bkey_for_each_ptr_decode(_k, (_p).start, (_p).end, \
353 #define bkey_crc_next(_k, _start, _end, _crc, _iter) \
355 __bkey_extent_entry_for_each_from(_iter, _end, _iter) \
356 if (extent_entry_is_crc(_iter)) { \
357 (_crc) = bch2_extent_crc_unpack(_k, \
358 entry_to_crc(_iter)); \
365 #define __bkey_for_each_crc(_k, _start, _end, _crc, _iter) \
366 for ((_crc) = bch2_extent_crc_unpack(_k, NULL), \
367 (_iter) = (_start); \
368 bkey_crc_next(_k, _start, _end, _crc, _iter); \
369 (_iter) = extent_entry_next(_iter))
371 #define bkey_for_each_crc(_k, _p, _crc, _iter) \
372 __bkey_for_each_crc(_k, (_p).start, (_p).end, _crc, _iter)
374 /* Iterate over pointers in KEY_TYPE_extent: */
376 #define extent_for_each_entry_from(_e, _entry, _start) \
377 __bkey_extent_entry_for_each_from(_start, \
378 extent_entry_last(_e), _entry)
380 #define extent_for_each_entry(_e, _entry) \
381 extent_for_each_entry_from(_e, _entry, (_e).v->start)
383 #define extent_ptr_next(_e, _ptr) \
384 __bkey_ptr_next(_ptr, extent_entry_last(_e))
386 #define extent_for_each_ptr(_e, _ptr) \
387 __bkey_for_each_ptr(&(_e).v->start->ptr, extent_entry_last(_e), _ptr)
389 #define extent_for_each_ptr_decode(_e, _ptr, _entry) \
390 __bkey_for_each_ptr_decode((_e).k, (_e).v->start, \
391 extent_entry_last(_e), _ptr, _entry)
393 /* utility code common to all keys with pointers: */
395 void bch2_mark_io_failure(struct bch_io_failures *,
396 struct extent_ptr_decoded *);
397 int bch2_bkey_pick_read_device(struct bch_fs *, struct bkey_s_c,
398 struct bch_io_failures *,
399 struct extent_ptr_decoded *);
401 /* KEY_TYPE_btree_ptr: */
403 int bch2_btree_ptr_invalid(struct bch_fs *, struct bkey_s_c,
404 enum bkey_invalid_flags, struct printbuf *);
405 void bch2_btree_ptr_to_text(struct printbuf *, struct bch_fs *,
408 int bch2_btree_ptr_v2_invalid(struct bch_fs *, struct bkey_s_c,
409 enum bkey_invalid_flags, struct printbuf *);
410 void bch2_btree_ptr_v2_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
411 void bch2_btree_ptr_v2_compat(enum btree_id, unsigned, unsigned,
414 #define bch2_bkey_ops_btree_ptr ((struct bkey_ops) { \
415 .key_invalid = bch2_btree_ptr_invalid, \
416 .val_to_text = bch2_btree_ptr_to_text, \
417 .swab = bch2_ptr_swab, \
418 .trigger = bch2_trigger_extent, \
421 #define bch2_bkey_ops_btree_ptr_v2 ((struct bkey_ops) { \
422 .key_invalid = bch2_btree_ptr_v2_invalid, \
423 .val_to_text = bch2_btree_ptr_v2_to_text, \
424 .swab = bch2_ptr_swab, \
425 .compat = bch2_btree_ptr_v2_compat, \
426 .trigger = bch2_trigger_extent, \
427 .min_val_size = 40, \
430 /* KEY_TYPE_extent: */
432 bool bch2_extent_merge(struct bch_fs *, struct bkey_s, struct bkey_s_c);
434 #define bch2_bkey_ops_extent ((struct bkey_ops) { \
435 .key_invalid = bch2_bkey_ptrs_invalid, \
436 .val_to_text = bch2_bkey_ptrs_to_text, \
437 .swab = bch2_ptr_swab, \
438 .key_normalize = bch2_extent_normalize, \
439 .key_merge = bch2_extent_merge, \
440 .trigger = bch2_trigger_extent, \
443 /* KEY_TYPE_reservation: */
445 int bch2_reservation_invalid(struct bch_fs *, struct bkey_s_c,
446 enum bkey_invalid_flags, struct printbuf *);
447 void bch2_reservation_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
448 bool bch2_reservation_merge(struct bch_fs *, struct bkey_s, struct bkey_s_c);
450 #define bch2_bkey_ops_reservation ((struct bkey_ops) { \
451 .key_invalid = bch2_reservation_invalid, \
452 .val_to_text = bch2_reservation_to_text, \
453 .key_merge = bch2_reservation_merge, \
454 .trigger = bch2_trigger_reservation, \
458 /* Extent checksum entries: */
460 bool bch2_can_narrow_extent_crcs(struct bkey_s_c,
461 struct bch_extent_crc_unpacked);
462 bool bch2_bkey_narrow_crcs(struct bkey_i *, struct bch_extent_crc_unpacked);
463 void bch2_extent_crc_append(struct bkey_i *,
464 struct bch_extent_crc_unpacked);
466 /* Generic code for keys with pointers: */
468 static inline bool bkey_is_btree_ptr(const struct bkey *k)
471 case KEY_TYPE_btree_ptr:
472 case KEY_TYPE_btree_ptr_v2:
479 static inline bool bkey_extent_is_direct_data(const struct bkey *k)
482 case KEY_TYPE_btree_ptr:
483 case KEY_TYPE_btree_ptr_v2:
484 case KEY_TYPE_extent:
485 case KEY_TYPE_reflink_v:
492 static inline bool bkey_extent_is_inline_data(const struct bkey *k)
494 return k->type == KEY_TYPE_inline_data ||
495 k->type == KEY_TYPE_indirect_inline_data;
498 static inline unsigned bkey_inline_data_offset(const struct bkey *k)
501 case KEY_TYPE_inline_data:
502 return sizeof(struct bch_inline_data);
503 case KEY_TYPE_indirect_inline_data:
504 return sizeof(struct bch_indirect_inline_data);
510 static inline unsigned bkey_inline_data_bytes(const struct bkey *k)
512 return bkey_val_bytes(k) - bkey_inline_data_offset(k);
515 #define bkey_inline_data_p(_k) (((void *) (_k).v) + bkey_inline_data_offset((_k).k))
517 static inline bool bkey_extent_is_data(const struct bkey *k)
519 return bkey_extent_is_direct_data(k) ||
520 bkey_extent_is_inline_data(k) ||
521 k->type == KEY_TYPE_reflink_p;
525 * Should extent be counted under inode->i_sectors?
527 static inline bool bkey_extent_is_allocation(const struct bkey *k)
530 case KEY_TYPE_extent:
531 case KEY_TYPE_reservation:
532 case KEY_TYPE_reflink_p:
533 case KEY_TYPE_reflink_v:
534 case KEY_TYPE_inline_data:
535 case KEY_TYPE_indirect_inline_data:
543 static inline bool bkey_extent_is_unwritten(struct bkey_s_c k)
545 struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
547 bkey_for_each_ptr(ptrs, ptr)
553 static inline bool bkey_extent_is_reservation(struct bkey_s_c k)
555 return k.k->type == KEY_TYPE_reservation ||
556 bkey_extent_is_unwritten(k);
559 static inline struct bch_devs_list bch2_bkey_devs(struct bkey_s_c k)
561 struct bch_devs_list ret = (struct bch_devs_list) { 0 };
562 struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
564 bkey_for_each_ptr(p, ptr)
565 ret.data[ret.nr++] = ptr->dev;
570 static inline struct bch_devs_list bch2_bkey_dirty_devs(struct bkey_s_c k)
572 struct bch_devs_list ret = (struct bch_devs_list) { 0 };
573 struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
575 bkey_for_each_ptr(p, ptr)
577 ret.data[ret.nr++] = ptr->dev;
582 static inline struct bch_devs_list bch2_bkey_cached_devs(struct bkey_s_c k)
584 struct bch_devs_list ret = (struct bch_devs_list) { 0 };
585 struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
587 bkey_for_each_ptr(p, ptr)
589 ret.data[ret.nr++] = ptr->dev;
594 static inline unsigned bch2_bkey_ptr_data_type(struct bkey_s_c k, const struct bch_extent_ptr *ptr)
597 case KEY_TYPE_btree_ptr:
598 case KEY_TYPE_btree_ptr_v2:
599 return BCH_DATA_btree;
600 case KEY_TYPE_extent:
601 case KEY_TYPE_reflink_v:
602 return BCH_DATA_user;
603 case KEY_TYPE_stripe: {
604 struct bkey_s_c_stripe s = bkey_s_c_to_stripe(k);
606 BUG_ON(ptr < s.v->ptrs ||
607 ptr >= s.v->ptrs + s.v->nr_blocks);
609 return ptr >= s.v->ptrs + s.v->nr_blocks - s.v->nr_redundant
618 unsigned bch2_bkey_nr_ptrs(struct bkey_s_c);
619 unsigned bch2_bkey_nr_ptrs_allocated(struct bkey_s_c);
620 unsigned bch2_bkey_nr_ptrs_fully_allocated(struct bkey_s_c);
621 bool bch2_bkey_is_incompressible(struct bkey_s_c);
622 unsigned bch2_bkey_sectors_compressed(struct bkey_s_c);
624 unsigned bch2_bkey_replicas(struct bch_fs *, struct bkey_s_c);
625 unsigned bch2_extent_ptr_desired_durability(struct bch_fs *, struct extent_ptr_decoded *);
626 unsigned bch2_extent_ptr_durability(struct bch_fs *, struct extent_ptr_decoded *);
627 unsigned bch2_bkey_durability(struct bch_fs *, struct bkey_s_c);
629 void bch2_bkey_drop_device(struct bkey_s, unsigned);
630 void bch2_bkey_drop_device_noerror(struct bkey_s, unsigned);
632 const struct bch_extent_ptr *bch2_bkey_has_device_c(struct bkey_s_c, unsigned);
634 static inline struct bch_extent_ptr *bch2_bkey_has_device(struct bkey_s k, unsigned dev)
636 return (void *) bch2_bkey_has_device_c(k.s_c, dev);
639 bool bch2_bkey_has_target(struct bch_fs *, struct bkey_s_c, unsigned);
641 void bch2_bkey_extent_entry_drop(struct bkey_i *, union bch_extent_entry *);
643 static inline void bch2_bkey_append_ptr(struct bkey_i *k, struct bch_extent_ptr ptr)
645 struct bch_extent_ptr *dest;
647 EBUG_ON(bch2_bkey_has_device(bkey_i_to_s(k), ptr.dev));
650 case KEY_TYPE_btree_ptr:
651 case KEY_TYPE_btree_ptr_v2:
652 case KEY_TYPE_extent:
653 EBUG_ON(bkey_val_u64s(&k->k) >= BKEY_EXTENT_VAL_U64s_MAX);
655 ptr.type = 1 << BCH_EXTENT_ENTRY_ptr;
656 dest = (struct bch_extent_ptr *)((void *) &k->v + bkey_val_bytes(&k->k));
665 void bch2_extent_ptr_decoded_append(struct bkey_i *,
666 struct extent_ptr_decoded *);
667 union bch_extent_entry *bch2_bkey_drop_ptr_noerror(struct bkey_s,
668 struct bch_extent_ptr *);
669 union bch_extent_entry *bch2_bkey_drop_ptr(struct bkey_s,
670 struct bch_extent_ptr *);
672 #define bch2_bkey_drop_ptrs(_k, _ptr, _cond) \
674 struct bkey_ptrs _ptrs = bch2_bkey_ptrs(_k); \
676 _ptr = &_ptrs.start->ptr; \
678 while ((_ptr = bkey_ptr_next(_ptrs, _ptr))) { \
680 _ptr = (void *) bch2_bkey_drop_ptr(_k, _ptr); \
681 _ptrs = bch2_bkey_ptrs(_k); \
689 bool bch2_bkey_matches_ptr(struct bch_fs *, struct bkey_s_c,
690 struct bch_extent_ptr, u64);
691 bool bch2_extents_match(struct bkey_s_c, struct bkey_s_c);
692 struct bch_extent_ptr *
693 bch2_extent_has_ptr(struct bkey_s_c, struct extent_ptr_decoded, struct bkey_s);
695 void bch2_extent_ptr_set_cached(struct bkey_s, struct bch_extent_ptr *);
697 bool bch2_extent_normalize(struct bch_fs *, struct bkey_s);
698 void bch2_bkey_ptrs_to_text(struct printbuf *, struct bch_fs *,
700 int bch2_bkey_ptrs_invalid(struct bch_fs *, struct bkey_s_c,
701 enum bkey_invalid_flags, struct printbuf *);
703 void bch2_ptr_swab(struct bkey_s);
705 const struct bch_extent_rebalance *bch2_bkey_rebalance_opts(struct bkey_s_c);
706 unsigned bch2_bkey_ptrs_need_rebalance(struct bch_fs *, struct bkey_s_c,
708 bool bch2_bkey_needs_rebalance(struct bch_fs *, struct bkey_s_c);
710 int bch2_bkey_set_needs_rebalance(struct bch_fs *, struct bkey_i *,
713 /* Generic extent code: */
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,
722 /* Returns how k overlaps with m */
723 static inline enum bch_extent_overlap bch2_extent_overlap(const struct bkey *k,
724 const struct bkey *m)
726 int cmp1 = bkey_lt(k->p, m->p);
727 int cmp2 = bkey_gt(bkey_start_pos(k), bkey_start_pos(m));
729 return (cmp1 << 1) + cmp2;
732 int bch2_cut_front_s(struct bpos, struct bkey_s);
733 int bch2_cut_back_s(struct bpos, struct bkey_s);
735 static inline void bch2_cut_front(struct bpos where, struct bkey_i *k)
737 bch2_cut_front_s(where, bkey_i_to_s(k));
740 static inline void bch2_cut_back(struct bpos where, struct bkey_i *k)
742 bch2_cut_back_s(where, bkey_i_to_s(k));
746 * bch_key_resize - adjust size of @k
748 * bkey_start_offset(k) will be preserved, modifies where the extent ends
750 static inline void bch2_key_resize(struct bkey *k, unsigned new_size)
752 k->p.offset -= k->size;
753 k->p.offset += new_size;
757 #endif /* _BCACHEFS_EXTENTS_H */