--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_EXTENTS_H
+#define _BCACHEFS_EXTENTS_H
+
+#include "bcachefs.h"
+#include "bkey.h"
+#include "extents_types.h"
+
+struct bch_fs;
+struct btree_trans;
+enum bkey_invalid_flags;
+
+/* extent entries: */
+
+#define extent_entry_last(_e) \
+ ((typeof(&(_e).v->start[0])) bkey_val_end(_e))
+
+#define entry_to_ptr(_entry) \
+({ \
+ EBUG_ON((_entry) && !extent_entry_is_ptr(_entry)); \
+ \
+ __builtin_choose_expr( \
+ type_is_exact(_entry, const union bch_extent_entry *), \
+ (const struct bch_extent_ptr *) (_entry), \
+ (struct bch_extent_ptr *) (_entry)); \
+})
+
+/* downcast, preserves const */
+#define to_entry(_entry) \
+({ \
+ BUILD_BUG_ON(!type_is(_entry, union bch_extent_crc *) && \
+ !type_is(_entry, struct bch_extent_ptr *) && \
+ !type_is(_entry, struct bch_extent_stripe_ptr *)); \
+ \
+ __builtin_choose_expr( \
+ (type_is_exact(_entry, const union bch_extent_crc *) || \
+ type_is_exact(_entry, const struct bch_extent_ptr *) ||\
+ type_is_exact(_entry, const struct bch_extent_stripe_ptr *)),\
+ (const union bch_extent_entry *) (_entry), \
+ (union bch_extent_entry *) (_entry)); \
+})
+
+#define extent_entry_next(_entry) \
+ ((typeof(_entry)) ((void *) (_entry) + extent_entry_bytes(_entry)))
+
+static inline unsigned
+__extent_entry_type(const union bch_extent_entry *e)
+{
+ return e->type ? __ffs(e->type) : BCH_EXTENT_ENTRY_MAX;
+}
+
+static inline enum bch_extent_entry_type
+extent_entry_type(const union bch_extent_entry *e)
+{
+ int ret = __ffs(e->type);
+
+ EBUG_ON(ret < 0 || ret >= BCH_EXTENT_ENTRY_MAX);
+
+ return ret;
+}
+
+static inline size_t extent_entry_bytes(const union bch_extent_entry *entry)
+{
+ switch (extent_entry_type(entry)) {
+#define x(f, n) \
+ case BCH_EXTENT_ENTRY_##f: \
+ return sizeof(struct bch_extent_##f);
+ BCH_EXTENT_ENTRY_TYPES()
+#undef x
+ default:
+ BUG();
+ }
+}
+
+static inline size_t extent_entry_u64s(const union bch_extent_entry *entry)
+{
+ return extent_entry_bytes(entry) / sizeof(u64);
+}
+
+static inline void __extent_entry_insert(struct bkey_i *k,
+ union bch_extent_entry *dst,
+ union bch_extent_entry *new)
+{
+ union bch_extent_entry *end = bkey_val_end(bkey_i_to_s(k));
+
+ memmove_u64s_up_small((u64 *) dst + extent_entry_u64s(new),
+ dst, (u64 *) end - (u64 *) dst);
+ k->k.u64s += extent_entry_u64s(new);
+ memcpy_u64s_small(dst, new, extent_entry_u64s(new));
+}
+
+static inline void extent_entry_drop(struct bkey_s k, union bch_extent_entry *entry)
+{
+ union bch_extent_entry *next = extent_entry_next(entry);
+
+ /* stripes have ptrs, but their layout doesn't work with this code */
+ BUG_ON(k.k->type == KEY_TYPE_stripe);
+
+ memmove_u64s_down(entry, next,
+ (u64 *) bkey_val_end(k) - (u64 *) next);
+ k.k->u64s -= (u64 *) next - (u64 *) entry;
+}
+
+static inline bool extent_entry_is_ptr(const union bch_extent_entry *e)
+{
+ return extent_entry_type(e) == BCH_EXTENT_ENTRY_ptr;
+}
+
+static inline bool extent_entry_is_stripe_ptr(const union bch_extent_entry *e)
+{
+ return extent_entry_type(e) == BCH_EXTENT_ENTRY_stripe_ptr;
+}
+
+static inline bool extent_entry_is_crc(const union bch_extent_entry *e)
+{
+ switch (extent_entry_type(e)) {
+ case BCH_EXTENT_ENTRY_crc32:
+ case BCH_EXTENT_ENTRY_crc64:
+ case BCH_EXTENT_ENTRY_crc128:
+ return true;
+ default:
+ return false;
+ }
+}
+
+union bch_extent_crc {
+ u8 type;
+ struct bch_extent_crc32 crc32;
+ struct bch_extent_crc64 crc64;
+ struct bch_extent_crc128 crc128;
+};
+
+#define __entry_to_crc(_entry) \
+ __builtin_choose_expr( \
+ type_is_exact(_entry, const union bch_extent_entry *), \
+ (const union bch_extent_crc *) (_entry), \
+ (union bch_extent_crc *) (_entry))
+
+#define entry_to_crc(_entry) \
+({ \
+ EBUG_ON((_entry) && !extent_entry_is_crc(_entry)); \
+ \
+ __entry_to_crc(_entry); \
+})
+
+static inline struct bch_extent_crc_unpacked
+bch2_extent_crc_unpack(const struct bkey *k, const union bch_extent_crc *crc)
+{
+#define common_fields(_crc) \
+ .csum_type = _crc.csum_type, \
+ .compression_type = _crc.compression_type, \
+ .compressed_size = _crc._compressed_size + 1, \
+ .uncompressed_size = _crc._uncompressed_size + 1, \
+ .offset = _crc.offset, \
+ .live_size = k->size
+
+ if (!crc)
+ return (struct bch_extent_crc_unpacked) {
+ .compressed_size = k->size,
+ .uncompressed_size = k->size,
+ .live_size = k->size,
+ };
+
+ switch (extent_entry_type(to_entry(crc))) {
+ case BCH_EXTENT_ENTRY_crc32: {
+ struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
+ common_fields(crc->crc32),
+ };
+
+ *((__le32 *) &ret.csum.lo) = (__le32 __force) crc->crc32.csum;
+ return ret;
+ }
+ case BCH_EXTENT_ENTRY_crc64: {
+ struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
+ common_fields(crc->crc64),
+ .nonce = crc->crc64.nonce,
+ .csum.lo = (__force __le64) crc->crc64.csum_lo,
+ };
+
+ *((__le16 *) &ret.csum.hi) = (__le16 __force) crc->crc64.csum_hi;
+
+ return ret;
+ }
+ case BCH_EXTENT_ENTRY_crc128: {
+ struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
+ common_fields(crc->crc128),
+ .nonce = crc->crc128.nonce,
+ .csum = crc->crc128.csum,
+ };
+
+ return ret;
+ }
+ default:
+ BUG();
+ }
+#undef common_fields
+}
+
+static inline bool crc_is_compressed(struct bch_extent_crc_unpacked crc)
+{
+ return (crc.compression_type != BCH_COMPRESSION_TYPE_none &&
+ crc.compression_type != BCH_COMPRESSION_TYPE_incompressible);
+}
+
+static inline bool crc_is_encoded(struct bch_extent_crc_unpacked crc)
+{
+ return crc.csum_type != BCH_CSUM_none || crc_is_compressed(crc);
+}
+
+/* bkey_ptrs: generically over any key type that has ptrs */
+
+struct bkey_ptrs_c {
+ const union bch_extent_entry *start;
+ const union bch_extent_entry *end;
+};
+
+struct bkey_ptrs {
+ union bch_extent_entry *start;
+ union bch_extent_entry *end;
+};
+
+static inline struct bkey_ptrs_c bch2_bkey_ptrs_c(struct bkey_s_c k)
+{
+ switch (k.k->type) {
+ case KEY_TYPE_btree_ptr: {
+ struct bkey_s_c_btree_ptr e = bkey_s_c_to_btree_ptr(k);
+
+ return (struct bkey_ptrs_c) {
+ to_entry(&e.v->start[0]),
+ to_entry(extent_entry_last(e))
+ };
+ }
+ case KEY_TYPE_extent: {
+ struct bkey_s_c_extent e = bkey_s_c_to_extent(k);
+
+ return (struct bkey_ptrs_c) {
+ e.v->start,
+ extent_entry_last(e)
+ };
+ }
+ case KEY_TYPE_stripe: {
+ struct bkey_s_c_stripe s = bkey_s_c_to_stripe(k);
+
+ return (struct bkey_ptrs_c) {
+ to_entry(&s.v->ptrs[0]),
+ to_entry(&s.v->ptrs[s.v->nr_blocks]),
+ };
+ }
+ case KEY_TYPE_reflink_v: {
+ struct bkey_s_c_reflink_v r = bkey_s_c_to_reflink_v(k);
+
+ return (struct bkey_ptrs_c) {
+ r.v->start,
+ bkey_val_end(r),
+ };
+ }
+ case KEY_TYPE_btree_ptr_v2: {
+ struct bkey_s_c_btree_ptr_v2 e = bkey_s_c_to_btree_ptr_v2(k);
+
+ return (struct bkey_ptrs_c) {
+ to_entry(&e.v->start[0]),
+ to_entry(extent_entry_last(e))
+ };
+ }
+ default:
+ return (struct bkey_ptrs_c) { NULL, NULL };
+ }
+}
+
+static inline struct bkey_ptrs bch2_bkey_ptrs(struct bkey_s k)
+{
+ struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k.s_c);
+
+ return (struct bkey_ptrs) {
+ (void *) p.start,
+ (void *) p.end
+ };
+}
+
+#define __bkey_extent_entry_for_each_from(_start, _end, _entry) \
+ for ((_entry) = (_start); \
+ (_entry) < (_end); \
+ (_entry) = extent_entry_next(_entry))
+
+#define __bkey_ptr_next(_ptr, _end) \
+({ \
+ typeof(_end) _entry; \
+ \
+ __bkey_extent_entry_for_each_from(to_entry(_ptr), _end, _entry) \
+ if (extent_entry_is_ptr(_entry)) \
+ break; \
+ \
+ _entry < (_end) ? entry_to_ptr(_entry) : NULL; \
+})
+
+#define bkey_extent_entry_for_each_from(_p, _entry, _start) \
+ __bkey_extent_entry_for_each_from(_start, (_p).end, _entry)
+
+#define bkey_extent_entry_for_each(_p, _entry) \
+ bkey_extent_entry_for_each_from(_p, _entry, _p.start)
+
+#define __bkey_for_each_ptr(_start, _end, _ptr) \
+ for (typeof(_start) (_ptr) = (_start); \
+ ((_ptr) = __bkey_ptr_next(_ptr, _end)); \
+ (_ptr)++)
+
+#define bkey_ptr_next(_p, _ptr) \
+ __bkey_ptr_next(_ptr, (_p).end)
+
+#define bkey_for_each_ptr(_p, _ptr) \
+ __bkey_for_each_ptr(&(_p).start->ptr, (_p).end, _ptr)
+
+#define __bkey_ptr_next_decode(_k, _end, _ptr, _entry) \
+({ \
+ __label__ out; \
+ \
+ (_ptr).idx = 0; \
+ (_ptr).has_ec = false; \
+ \
+ __bkey_extent_entry_for_each_from(_entry, _end, _entry) \
+ switch (extent_entry_type(_entry)) { \
+ case BCH_EXTENT_ENTRY_ptr: \
+ (_ptr).ptr = _entry->ptr; \
+ goto out; \
+ case BCH_EXTENT_ENTRY_crc32: \
+ case BCH_EXTENT_ENTRY_crc64: \
+ case BCH_EXTENT_ENTRY_crc128: \
+ (_ptr).crc = bch2_extent_crc_unpack(_k, \
+ entry_to_crc(_entry)); \
+ break; \
+ case BCH_EXTENT_ENTRY_stripe_ptr: \
+ (_ptr).ec = _entry->stripe_ptr; \
+ (_ptr).has_ec = true; \
+ break; \
+ default: \
+ /* nothing */ \
+ break; \
+ } \
+out: \
+ _entry < (_end); \
+})
+
+#define __bkey_for_each_ptr_decode(_k, _start, _end, _ptr, _entry) \
+ for ((_ptr).crc = bch2_extent_crc_unpack(_k, NULL), \
+ (_entry) = _start; \
+ __bkey_ptr_next_decode(_k, _end, _ptr, _entry); \
+ (_entry) = extent_entry_next(_entry))
+
+#define bkey_for_each_ptr_decode(_k, _p, _ptr, _entry) \
+ __bkey_for_each_ptr_decode(_k, (_p).start, (_p).end, \
+ _ptr, _entry)
+
+#define bkey_crc_next(_k, _start, _end, _crc, _iter) \
+({ \
+ __bkey_extent_entry_for_each_from(_iter, _end, _iter) \
+ if (extent_entry_is_crc(_iter)) { \
+ (_crc) = bch2_extent_crc_unpack(_k, \
+ entry_to_crc(_iter)); \
+ break; \
+ } \
+ \
+ (_iter) < (_end); \
+})
+
+#define __bkey_for_each_crc(_k, _start, _end, _crc, _iter) \
+ for ((_crc) = bch2_extent_crc_unpack(_k, NULL), \
+ (_iter) = (_start); \
+ bkey_crc_next(_k, _start, _end, _crc, _iter); \
+ (_iter) = extent_entry_next(_iter))
+
+#define bkey_for_each_crc(_k, _p, _crc, _iter) \
+ __bkey_for_each_crc(_k, (_p).start, (_p).end, _crc, _iter)
+
+/* Iterate over pointers in KEY_TYPE_extent: */
+
+#define extent_for_each_entry_from(_e, _entry, _start) \
+ __bkey_extent_entry_for_each_from(_start, \
+ extent_entry_last(_e), _entry)
+
+#define extent_for_each_entry(_e, _entry) \
+ extent_for_each_entry_from(_e, _entry, (_e).v->start)
+
+#define extent_ptr_next(_e, _ptr) \
+ __bkey_ptr_next(_ptr, extent_entry_last(_e))
+
+#define extent_for_each_ptr(_e, _ptr) \
+ __bkey_for_each_ptr(&(_e).v->start->ptr, extent_entry_last(_e), _ptr)
+
+#define extent_for_each_ptr_decode(_e, _ptr, _entry) \
+ __bkey_for_each_ptr_decode((_e).k, (_e).v->start, \
+ extent_entry_last(_e), _ptr, _entry)
+
+/* utility code common to all keys with pointers: */
+
+void bch2_mark_io_failure(struct bch_io_failures *,
+ struct extent_ptr_decoded *);
+int bch2_bkey_pick_read_device(struct bch_fs *, struct bkey_s_c,
+ struct bch_io_failures *,
+ struct extent_ptr_decoded *);
+
+/* KEY_TYPE_btree_ptr: */
+
+int bch2_btree_ptr_invalid(struct bch_fs *, struct bkey_s_c,
+ enum bkey_invalid_flags, struct printbuf *);
+void bch2_btree_ptr_to_text(struct printbuf *, struct bch_fs *,
+ struct bkey_s_c);
+
+int bch2_btree_ptr_v2_invalid(struct bch_fs *, struct bkey_s_c,
+ enum bkey_invalid_flags, struct printbuf *);
+void bch2_btree_ptr_v2_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
+void bch2_btree_ptr_v2_compat(enum btree_id, unsigned, unsigned,
+ int, struct bkey_s);
+
+#define bch2_bkey_ops_btree_ptr ((struct bkey_ops) { \
+ .key_invalid = bch2_btree_ptr_invalid, \
+ .val_to_text = bch2_btree_ptr_to_text, \
+ .swab = bch2_ptr_swab, \
+ .trigger = bch2_trigger_extent, \
+})
+
+#define bch2_bkey_ops_btree_ptr_v2 ((struct bkey_ops) { \
+ .key_invalid = bch2_btree_ptr_v2_invalid, \
+ .val_to_text = bch2_btree_ptr_v2_to_text, \
+ .swab = bch2_ptr_swab, \
+ .compat = bch2_btree_ptr_v2_compat, \
+ .trigger = bch2_trigger_extent, \
+ .min_val_size = 40, \
+})
+
+/* KEY_TYPE_extent: */
+
+bool bch2_extent_merge(struct bch_fs *, struct bkey_s, struct bkey_s_c);
+
+#define bch2_bkey_ops_extent ((struct bkey_ops) { \
+ .key_invalid = bch2_bkey_ptrs_invalid, \
+ .val_to_text = bch2_bkey_ptrs_to_text, \
+ .swab = bch2_ptr_swab, \
+ .key_normalize = bch2_extent_normalize, \
+ .key_merge = bch2_extent_merge, \
+ .trigger = bch2_trigger_extent, \
+})
+
+/* KEY_TYPE_reservation: */
+
+int bch2_reservation_invalid(struct bch_fs *, struct bkey_s_c,
+ enum bkey_invalid_flags, struct printbuf *);
+void bch2_reservation_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
+bool bch2_reservation_merge(struct bch_fs *, struct bkey_s, struct bkey_s_c);
+
+#define bch2_bkey_ops_reservation ((struct bkey_ops) { \
+ .key_invalid = bch2_reservation_invalid, \
+ .val_to_text = bch2_reservation_to_text, \
+ .key_merge = bch2_reservation_merge, \
+ .trigger = bch2_trigger_reservation, \
+ .min_val_size = 8, \
+})
+
+/* Extent checksum entries: */
+
+bool bch2_can_narrow_extent_crcs(struct bkey_s_c,
+ struct bch_extent_crc_unpacked);
+bool bch2_bkey_narrow_crcs(struct bkey_i *, struct bch_extent_crc_unpacked);
+void bch2_extent_crc_append(struct bkey_i *,
+ struct bch_extent_crc_unpacked);
+
+/* Generic code for keys with pointers: */
+
+static inline bool bkey_is_btree_ptr(const struct bkey *k)
+{
+ switch (k->type) {
+ case KEY_TYPE_btree_ptr:
+ case KEY_TYPE_btree_ptr_v2:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static inline bool bkey_extent_is_direct_data(const struct bkey *k)
+{
+ switch (k->type) {
+ case KEY_TYPE_btree_ptr:
+ case KEY_TYPE_btree_ptr_v2:
+ case KEY_TYPE_extent:
+ case KEY_TYPE_reflink_v:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static inline bool bkey_extent_is_inline_data(const struct bkey *k)
+{
+ return k->type == KEY_TYPE_inline_data ||
+ k->type == KEY_TYPE_indirect_inline_data;
+}
+
+static inline unsigned bkey_inline_data_offset(const struct bkey *k)
+{
+ switch (k->type) {
+ case KEY_TYPE_inline_data:
+ return sizeof(struct bch_inline_data);
+ case KEY_TYPE_indirect_inline_data:
+ return sizeof(struct bch_indirect_inline_data);
+ default:
+ BUG();
+ }
+}
+
+static inline unsigned bkey_inline_data_bytes(const struct bkey *k)
+{
+ return bkey_val_bytes(k) - bkey_inline_data_offset(k);
+}
+
+#define bkey_inline_data_p(_k) (((void *) (_k).v) + bkey_inline_data_offset((_k).k))
+
+static inline bool bkey_extent_is_data(const struct bkey *k)
+{
+ return bkey_extent_is_direct_data(k) ||
+ bkey_extent_is_inline_data(k) ||
+ k->type == KEY_TYPE_reflink_p;
+}
+
+/*
+ * Should extent be counted under inode->i_sectors?
+ */
+static inline bool bkey_extent_is_allocation(const struct bkey *k)
+{
+ switch (k->type) {
+ case KEY_TYPE_extent:
+ case KEY_TYPE_reservation:
+ case KEY_TYPE_reflink_p:
+ case KEY_TYPE_reflink_v:
+ case KEY_TYPE_inline_data:
+ case KEY_TYPE_indirect_inline_data:
+ case KEY_TYPE_error:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static inline bool bkey_extent_is_unwritten(struct bkey_s_c k)
+{
+ struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
+
+ bkey_for_each_ptr(ptrs, ptr)
+ if (ptr->unwritten)
+ return true;
+ return false;
+}
+
+static inline bool bkey_extent_is_reservation(struct bkey_s_c k)
+{
+ return k.k->type == KEY_TYPE_reservation ||
+ bkey_extent_is_unwritten(k);
+}
+
+static inline struct bch_devs_list bch2_bkey_devs(struct bkey_s_c k)
+{
+ struct bch_devs_list ret = (struct bch_devs_list) { 0 };
+ struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
+
+ bkey_for_each_ptr(p, ptr)
+ ret.data[ret.nr++] = ptr->dev;
+
+ return ret;
+}
+
+static inline struct bch_devs_list bch2_bkey_dirty_devs(struct bkey_s_c k)
+{
+ struct bch_devs_list ret = (struct bch_devs_list) { 0 };
+ struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
+
+ bkey_for_each_ptr(p, ptr)
+ if (!ptr->cached)
+ ret.data[ret.nr++] = ptr->dev;
+
+ return ret;
+}
+
+static inline struct bch_devs_list bch2_bkey_cached_devs(struct bkey_s_c k)
+{
+ struct bch_devs_list ret = (struct bch_devs_list) { 0 };
+ struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
+
+ bkey_for_each_ptr(p, ptr)
+ if (ptr->cached)
+ ret.data[ret.nr++] = ptr->dev;
+
+ return ret;
+}
+
+static inline unsigned bch2_bkey_ptr_data_type(struct bkey_s_c k, const struct bch_extent_ptr *ptr)
+{
+ switch (k.k->type) {
+ case KEY_TYPE_btree_ptr:
+ case KEY_TYPE_btree_ptr_v2:
+ return BCH_DATA_btree;
+ case KEY_TYPE_extent:
+ case KEY_TYPE_reflink_v:
+ return BCH_DATA_user;
+ case KEY_TYPE_stripe: {
+ struct bkey_s_c_stripe s = bkey_s_c_to_stripe(k);
+
+ BUG_ON(ptr < s.v->ptrs ||
+ ptr >= s.v->ptrs + s.v->nr_blocks);
+
+ return ptr >= s.v->ptrs + s.v->nr_blocks - s.v->nr_redundant
+ ? BCH_DATA_parity
+ : BCH_DATA_user;
+ }
+ default:
+ BUG();
+ }
+}
+
+unsigned bch2_bkey_nr_ptrs(struct bkey_s_c);
+unsigned bch2_bkey_nr_ptrs_allocated(struct bkey_s_c);
+unsigned bch2_bkey_nr_ptrs_fully_allocated(struct bkey_s_c);
+bool bch2_bkey_is_incompressible(struct bkey_s_c);
+unsigned bch2_bkey_sectors_compressed(struct bkey_s_c);
+
+unsigned bch2_bkey_replicas(struct bch_fs *, struct bkey_s_c);
+unsigned bch2_extent_ptr_desired_durability(struct bch_fs *, struct extent_ptr_decoded *);
+unsigned bch2_extent_ptr_durability(struct bch_fs *, struct extent_ptr_decoded *);
+unsigned bch2_bkey_durability(struct bch_fs *, struct bkey_s_c);
+
+void bch2_bkey_drop_device(struct bkey_s, unsigned);
+void bch2_bkey_drop_device_noerror(struct bkey_s, unsigned);
+
+const struct bch_extent_ptr *bch2_bkey_has_device_c(struct bkey_s_c, unsigned);
+
+static inline struct bch_extent_ptr *bch2_bkey_has_device(struct bkey_s k, unsigned dev)
+{
+ return (void *) bch2_bkey_has_device_c(k.s_c, dev);
+}
+
+bool bch2_bkey_has_target(struct bch_fs *, struct bkey_s_c, unsigned);
+
+void bch2_bkey_extent_entry_drop(struct bkey_i *, union bch_extent_entry *);
+
+static inline void bch2_bkey_append_ptr(struct bkey_i *k, struct bch_extent_ptr ptr)
+{
+ struct bch_extent_ptr *dest;
+
+ EBUG_ON(bch2_bkey_has_device(bkey_i_to_s(k), ptr.dev));
+
+ switch (k->k.type) {
+ case KEY_TYPE_btree_ptr:
+ case KEY_TYPE_btree_ptr_v2:
+ case KEY_TYPE_extent:
+ EBUG_ON(bkey_val_u64s(&k->k) >= BKEY_EXTENT_VAL_U64s_MAX);
+
+ ptr.type = 1 << BCH_EXTENT_ENTRY_ptr;
+ dest = (struct bch_extent_ptr *)((void *) &k->v + bkey_val_bytes(&k->k));
+ *dest = ptr;
+ k->k.u64s++;
+ break;
+ default:
+ BUG();
+ }
+}
+
+void bch2_extent_ptr_decoded_append(struct bkey_i *,
+ struct extent_ptr_decoded *);
+union bch_extent_entry *bch2_bkey_drop_ptr_noerror(struct bkey_s,
+ struct bch_extent_ptr *);
+union bch_extent_entry *bch2_bkey_drop_ptr(struct bkey_s,
+ struct bch_extent_ptr *);
+
+#define bch2_bkey_drop_ptrs(_k, _ptr, _cond) \
+do { \
+ struct bkey_ptrs _ptrs = bch2_bkey_ptrs(_k); \
+ \
+ _ptr = &_ptrs.start->ptr; \
+ \
+ while ((_ptr = bkey_ptr_next(_ptrs, _ptr))) { \
+ if (_cond) { \
+ _ptr = (void *) bch2_bkey_drop_ptr(_k, _ptr); \
+ _ptrs = bch2_bkey_ptrs(_k); \
+ continue; \
+ } \
+ \
+ (_ptr)++; \
+ } \
+} while (0)
+
+bool bch2_bkey_matches_ptr(struct bch_fs *, struct bkey_s_c,
+ struct bch_extent_ptr, u64);
+bool bch2_extents_match(struct bkey_s_c, struct bkey_s_c);
+struct bch_extent_ptr *
+bch2_extent_has_ptr(struct bkey_s_c, struct extent_ptr_decoded, struct bkey_s);
+
+void bch2_extent_ptr_set_cached(struct bkey_s, struct bch_extent_ptr *);
+
+bool bch2_extent_normalize(struct bch_fs *, struct bkey_s);
+void bch2_bkey_ptrs_to_text(struct printbuf *, struct bch_fs *,
+ struct bkey_s_c);
+int bch2_bkey_ptrs_invalid(struct bch_fs *, struct bkey_s_c,
+ enum bkey_invalid_flags, struct printbuf *);
+
+void bch2_ptr_swab(struct bkey_s);
+
+const struct bch_extent_rebalance *bch2_bkey_rebalance_opts(struct bkey_s_c);
+unsigned bch2_bkey_ptrs_need_rebalance(struct bch_fs *, struct bkey_s_c,
+ unsigned, unsigned);
+bool bch2_bkey_needs_rebalance(struct bch_fs *, struct bkey_s_c);
+
+int bch2_bkey_set_needs_rebalance(struct bch_fs *, struct bkey_i *,
+ unsigned, unsigned);
+
+/* Generic extent code: */
+
+enum bch_extent_overlap {
+ BCH_EXTENT_OVERLAP_ALL = 0,
+ BCH_EXTENT_OVERLAP_BACK = 1,
+ BCH_EXTENT_OVERLAP_FRONT = 2,
+ BCH_EXTENT_OVERLAP_MIDDLE = 3,
+};
+
+/* Returns how k overlaps with m */
+static inline enum bch_extent_overlap bch2_extent_overlap(const struct bkey *k,
+ const struct bkey *m)
+{
+ int cmp1 = bkey_lt(k->p, m->p);
+ int cmp2 = bkey_gt(bkey_start_pos(k), bkey_start_pos(m));
+
+ return (cmp1 << 1) + cmp2;
+}
+
+int bch2_cut_front_s(struct bpos, struct bkey_s);
+int bch2_cut_back_s(struct bpos, struct bkey_s);
+
+static inline void bch2_cut_front(struct bpos where, struct bkey_i *k)
+{
+ bch2_cut_front_s(where, bkey_i_to_s(k));
+}
+
+static inline void bch2_cut_back(struct bpos where, struct bkey_i *k)
+{
+ bch2_cut_back_s(where, bkey_i_to_s(k));
+}
+
+/**
+ * bch_key_resize - adjust size of @k
+ *
+ * bkey_start_offset(k) will be preserved, modifies where the extent ends
+ */
+static inline void bch2_key_resize(struct bkey *k, unsigned new_size)
+{
+ k->p.offset -= k->size;
+ k->p.offset += new_size;
+ k->size = new_size;
+}
+
+#endif /* _BCACHEFS_EXTENTS_H */
projects / bcachefs-tools-debian / blobdiff