// SPDX-License-Identifier: GPL-2.0
#include "bcachefs.h"
-#include "bkey_on_stack.h"
+#include "bkey_buf.h"
+#include "bkey_cmp.h"
#include "bkey_sort.h"
#include "bset.h"
#include "extents.h"
-/* too many iterators, need to clean this up */
-
-/* btree_node_iter_large: */
-
-#define btree_node_iter_cmp_heap(h, _l, _r) btree_node_iter_cmp(b, _l, _r)
+typedef int (*sort_cmp_fn)(struct btree *,
+ struct bkey_packed *,
+ struct bkey_packed *);
-static inline bool
-bch2_btree_node_iter_large_end(struct btree_node_iter_large *iter)
+static inline bool sort_iter_end(struct sort_iter *iter)
{
return !iter->used;
}
-static inline struct bkey_packed *
-bch2_btree_node_iter_large_peek_all(struct btree_node_iter_large *iter,
- struct btree *b)
-{
- return bch2_btree_node_iter_large_end(iter)
- ? NULL
- : __btree_node_offset_to_key(b, iter->data->k);
-}
-
-static void
-bch2_btree_node_iter_large_advance(struct btree_node_iter_large *iter,
- struct btree *b)
-{
- iter->data->k += __btree_node_offset_to_key(b, iter->data->k)->u64s;
-
- EBUG_ON(!iter->used);
- EBUG_ON(iter->data->k > iter->data->end);
-
- if (iter->data->k == iter->data->end)
- heap_del(iter, 0, btree_node_iter_cmp_heap, NULL);
- else
- heap_sift_down(iter, 0, btree_node_iter_cmp_heap, NULL);
-}
-
-static inline struct bkey_packed *
-bch2_btree_node_iter_large_next_all(struct btree_node_iter_large *iter,
- struct btree *b)
-{
- struct bkey_packed *ret = bch2_btree_node_iter_large_peek_all(iter, b);
-
- if (ret)
- bch2_btree_node_iter_large_advance(iter, b);
-
- return ret;
-}
-
-void bch2_btree_node_iter_large_push(struct btree_node_iter_large *iter,
- struct btree *b,
- const struct bkey_packed *k,
- const struct bkey_packed *end)
-{
- if (k != end) {
- struct btree_node_iter_set n =
- ((struct btree_node_iter_set) {
- __btree_node_key_to_offset(b, k),
- __btree_node_key_to_offset(b, end)
- });
-
- __heap_add(iter, n, btree_node_iter_cmp_heap, NULL);
- }
-}
-
-static void sort_key_next(struct btree_node_iter_large *iter,
- struct btree *b,
- struct btree_node_iter_set *i)
-{
- i->k += __btree_node_offset_to_key(b, i->k)->u64s;
-
- while (i->k != i->end &&
- !__btree_node_offset_to_key(b, i->k)->u64s)
- i->k++;
-
- if (i->k == i->end)
- *i = iter->data[--iter->used];
-}
-
-/* regular sort_iters */
-
-typedef int (*sort_cmp_fn)(struct btree *,
- struct bkey_packed *,
- struct bkey_packed *);
-
-static inline void __sort_iter_sift(struct sort_iter *iter,
- unsigned from,
- sort_cmp_fn cmp)
+static inline void sort_iter_sift(struct sort_iter *iter, unsigned from,
+ sort_cmp_fn cmp)
{
unsigned i;
swap(iter->data[i], iter->data[i + 1]);
}
-static inline void sort_iter_sift(struct sort_iter *iter, sort_cmp_fn cmp)
-{
-
- __sort_iter_sift(iter, 0, cmp);
-}
-
static inline void sort_iter_sort(struct sort_iter *iter, sort_cmp_fn cmp)
{
unsigned i = iter->used;
while (i--)
- __sort_iter_sift(iter, i, cmp);
+ sort_iter_sift(iter, i, cmp);
}
static inline struct bkey_packed *sort_iter_peek(struct sort_iter *iter)
{
- return iter->used ? iter->data->k : NULL;
+ return !sort_iter_end(iter) ? iter->data->k : NULL;
}
static inline void sort_iter_advance(struct sort_iter *iter, sort_cmp_fn cmp)
{
- iter->data->k = bkey_next_skip_noops(iter->data->k, iter->data->end);
+ struct sort_iter_set *i = iter->data;
- BUG_ON(iter->data->k > iter->data->end);
+ BUG_ON(!iter->used);
- if (iter->data->k == iter->data->end)
+ i->k = bkey_p_next(i->k);
+
+ BUG_ON(i->k > i->end);
+
+ if (i->k == i->end)
array_remove_item(iter->data, iter->used, 0);
else
- sort_iter_sift(iter, cmp);
+ sort_iter_sift(iter, 0, cmp);
}
static inline struct bkey_packed *sort_iter_next(struct sort_iter *iter,
}
/*
- * Returns true if l > r - unless l == r, in which case returns true if l is
- * older than r.
- *
- * Necessary for btree_sort_fixup() - if there are multiple keys that compare
- * equal in different sets, we have to process them newest to oldest.
+ * If keys compare equal, compare by pointer order:
*/
-#define key_sort_cmp(h, l, r) \
-({ \
- bkey_cmp_packed(b, \
- __btree_node_offset_to_key(b, (l).k), \
- __btree_node_offset_to_key(b, (r).k)) \
- \
- ?: (l).k - (r).k; \
-})
-
-static inline bool should_drop_next_key(struct btree_node_iter_large *iter,
- struct btree *b)
+static inline int key_sort_fix_overlapping_cmp(struct btree *b,
+ struct bkey_packed *l,
+ struct bkey_packed *r)
{
- struct btree_node_iter_set *l = iter->data, *r = iter->data + 1;
- struct bkey_packed *k = __btree_node_offset_to_key(b, l->k);
-
- if (bkey_whiteout(k))
- return true;
-
- if (iter->used < 2)
- return false;
-
- if (iter->used > 2 &&
- key_sort_cmp(iter, r[0], r[1]) >= 0)
- r++;
+ return bch2_bkey_cmp_packed(b, l, r) ?:
+ cmp_int((unsigned long) l, (unsigned long) r);
+}
+static inline bool should_drop_next_key(struct sort_iter *iter)
+{
/*
* key_sort_cmp() ensures that when keys compare equal the older key
- * comes first; so if l->k compares equal to r->k then l->k is older and
- * should be dropped.
+ * comes first; so if l->k compares equal to r->k then l->k is older
+ * and should be dropped.
*/
- return !bkey_cmp_packed(b,
- __btree_node_offset_to_key(b, l->k),
- __btree_node_offset_to_key(b, r->k));
+ return iter->used >= 2 &&
+ !bch2_bkey_cmp_packed(iter->b,
+ iter->data[0].k,
+ iter->data[1].k);
}
-struct btree_nr_keys bch2_key_sort_fix_overlapping(struct bset *dst,
- struct btree *b,
- struct btree_node_iter_large *iter)
+struct btree_nr_keys
+bch2_key_sort_fix_overlapping(struct bch_fs *c, struct bset *dst,
+ struct sort_iter *iter)
{
struct bkey_packed *out = dst->start;
+ struct bkey_packed *k;
struct btree_nr_keys nr;
memset(&nr, 0, sizeof(nr));
- heap_resort(iter, key_sort_cmp, NULL);
-
- while (!bch2_btree_node_iter_large_end(iter)) {
- if (!should_drop_next_key(iter, b)) {
- struct bkey_packed *k =
- __btree_node_offset_to_key(b, iter->data->k);
+ sort_iter_sort(iter, key_sort_fix_overlapping_cmp);
+ while ((k = sort_iter_peek(iter))) {
+ if (!bkey_deleted(k) &&
+ !should_drop_next_key(iter)) {
bkey_copy(out, k);
btree_keys_account_key_add(&nr, 0, out);
- out = bkey_next(out);
+ out = bkey_p_next(out);
}
- sort_key_next(iter, b, iter->data);
- heap_sift_down(iter, 0, key_sort_cmp, NULL);
+ sort_iter_advance(iter, key_sort_fix_overlapping_cmp);
}
dst->u64s = cpu_to_le16((u64 *) out - dst->_data);
return nr;
}
-/*
- * If keys compare equal, compare by pointer order:
- *
- * Necessary for sort_fix_overlapping() - if there are multiple keys that
- * compare equal in different sets, we have to process them newest to oldest.
- */
-#define extent_sort_cmp(h, l, r) \
-({ \
- struct bkey _ul = bkey_unpack_key(b, \
- __btree_node_offset_to_key(b, (l).k)); \
- struct bkey _ur = bkey_unpack_key(b, \
- __btree_node_offset_to_key(b, (r).k)); \
- \
- bkey_cmp(bkey_start_pos(&_ul), \
- bkey_start_pos(&_ur)) ?: (r).k - (l).k; \
-})
-
-static inline void extent_sort_sift(struct btree_node_iter_large *iter,
- struct btree *b, size_t i)
-{
- heap_sift_down(iter, i, extent_sort_cmp, NULL);
-}
-
-static inline void extent_sort_next(struct btree_node_iter_large *iter,
- struct btree *b,
- struct btree_node_iter_set *i)
-{
- sort_key_next(iter, b, i);
- heap_sift_down(iter, i - iter->data, extent_sort_cmp, NULL);
-}
-
-static void extent_sort_advance_prev(struct bkey_format *f,
- struct btree_nr_keys *nr,
- struct bkey_packed *start,
- struct bkey_packed **prev)
-{
- if (*prev) {
- bch2_bkey_pack(*prev, (void *) *prev, f);
-
- btree_keys_account_key_add(nr, 0, *prev);
- *prev = bkey_next(*prev);
- } else {
- *prev = start;
- }
-}
-
-static void extent_sort_append(struct bch_fs *c,
- struct bkey_format *f,
- struct btree_nr_keys *nr,
- struct bkey_packed *start,
- struct bkey_packed **prev,
- struct bkey_s k)
-{
- if (bkey_whiteout(k.k))
- return;
-
- /*
- * prev is always unpacked, for key merging - until right before we
- * advance it:
- */
-
- if (*prev &&
- bch2_bkey_merge(c, bkey_i_to_s((void *) *prev), k) ==
- BCH_MERGE_MERGE)
- return;
-
- extent_sort_advance_prev(f, nr, start, prev);
-
- bkey_reassemble((void *) *prev, k.s_c);
-}
-
-struct btree_nr_keys bch2_extent_sort_fix_overlapping(struct bch_fs *c,
- struct bset *dst,
- struct btree *b,
- struct btree_node_iter_large *iter)
-{
- struct bkey_format *f = &b->format;
- struct btree_node_iter_set *_l = iter->data, *_r;
- struct bkey_packed *prev = NULL, *lk, *rk;
- struct bkey l_unpacked, r_unpacked;
- struct bkey_s l, r;
- struct btree_nr_keys nr;
- struct bkey_on_stack split;
-
- memset(&nr, 0, sizeof(nr));
- bkey_on_stack_init(&split);
-
- heap_resort(iter, extent_sort_cmp, NULL);
-
- while (!bch2_btree_node_iter_large_end(iter)) {
- lk = __btree_node_offset_to_key(b, _l->k);
- l = __bkey_disassemble(b, lk, &l_unpacked);
-
- if (iter->used == 1) {
- extent_sort_append(c, f, &nr, dst->start, &prev, l);
- extent_sort_next(iter, b, _l);
- continue;
- }
-
- _r = iter->data + 1;
- if (iter->used > 2 &&
- extent_sort_cmp(iter, _r[0], _r[1]) >= 0)
- _r++;
-
- rk = __btree_node_offset_to_key(b, _r->k);
- r = __bkey_disassemble(b, rk, &r_unpacked);
-
- /* If current key and next key don't overlap, just append */
- if (bkey_cmp(l.k->p, bkey_start_pos(r.k)) <= 0) {
- extent_sort_append(c, f, &nr, dst->start, &prev, l);
- extent_sort_next(iter, b, _l);
- continue;
- }
-
- /* Skip 0 size keys */
- if (!r.k->size) {
- extent_sort_next(iter, b, _r);
- continue;
- }
-
- /*
- * overlap: keep the newer key and trim the older key so they
- * don't overlap. comparing pointers tells us which one is
- * newer, since the bsets are appended one after the other.
- */
-
- /* can't happen because of comparison func */
- BUG_ON(_l->k < _r->k &&
- !bkey_cmp(bkey_start_pos(l.k), bkey_start_pos(r.k)));
-
- if (_l->k > _r->k) {
- /* l wins, trim r */
- if (bkey_cmp(l.k->p, r.k->p) >= 0) {
- sort_key_next(iter, b, _r);
- } else {
- bch2_cut_front_s(l.k->p, r);
- extent_save(b, rk, r.k);
- }
-
- extent_sort_sift(iter, b, _r - iter->data);
- } else if (bkey_cmp(l.k->p, r.k->p) > 0) {
- bkey_on_stack_realloc(&split, c, l.k->u64s);
-
- /*
- * r wins, but it overlaps in the middle of l - split l:
- */
- bkey_reassemble(split.k, l.s_c);
- bch2_cut_back(bkey_start_pos(r.k), split.k);
-
- bch2_cut_front_s(r.k->p, l);
- extent_save(b, lk, l.k);
-
- extent_sort_sift(iter, b, 0);
-
- extent_sort_append(c, f, &nr, dst->start,
- &prev, bkey_i_to_s(split.k));
- } else {
- bch2_cut_back_s(bkey_start_pos(r.k), l);
- extent_save(b, lk, l.k);
- }
- }
-
- extent_sort_advance_prev(f, &nr, dst->start, &prev);
-
- dst->u64s = cpu_to_le16((u64 *) prev - dst->_data);
-
- bkey_on_stack_exit(&split, c);
- return nr;
-}
-
/* Sort + repack in a new format: */
struct btree_nr_keys
bch2_sort_repack(struct bset *dst, struct btree *src,
struct bkey_format *in_f = &src->format;
struct bkey_packed *in, *out = vstruct_last(dst);
struct btree_nr_keys nr;
+ bool transform = memcmp(out_f, &src->format, sizeof(*out_f));
memset(&nr, 0, sizeof(nr));
while ((in = bch2_btree_node_iter_next_all(src_iter, src))) {
- if (filter_whiteouts && bkey_whiteout(in))
+ if (filter_whiteouts && bkey_deleted(in))
continue;
- if (bch2_bkey_transform(out_f, out, bkey_packed(in)
- ? in_f : &bch2_bkey_format_current, in))
+ if (!transform)
+ bkey_copy(out, in);
+ else if (bch2_bkey_transform(out_f, out, bkey_packed(in)
+ ? in_f : &bch2_bkey_format_current, in))
out->format = KEY_FORMAT_LOCAL_BTREE;
else
bch2_bkey_unpack(src, (void *) out, in);
+ out->needs_whiteout = false;
+
btree_keys_account_key_add(&nr, 0, out);
- out = bkey_next(out);
+ out = bkey_p_next(out);
}
dst->u64s = cpu_to_le16((u64 *) out - dst->_data);
return nr;
}
-/* Sort, repack, and merge: */
-struct btree_nr_keys
-bch2_sort_repack_merge(struct bch_fs *c,
- struct bset *dst, struct btree *src,
- struct btree_node_iter *iter,
- struct bkey_format *out_f,
- bool filter_whiteouts)
-{
- struct bkey_packed *prev = NULL, *k_packed;
- struct bkey_s k;
- struct btree_nr_keys nr;
- struct bkey unpacked;
-
- memset(&nr, 0, sizeof(nr));
-
- while ((k_packed = bch2_btree_node_iter_next_all(iter, src))) {
- if (filter_whiteouts && bkey_whiteout(k_packed))
- continue;
-
- k = __bkey_disassemble(src, k_packed, &unpacked);
-
- if (filter_whiteouts &&
- bch2_bkey_normalize(c, k))
- continue;
-
- extent_sort_append(c, out_f, &nr, vstruct_last(dst), &prev, k);
- }
-
- extent_sort_advance_prev(out_f, &nr, vstruct_last(dst), &prev);
-
- dst->u64s = cpu_to_le16((u64 *) prev - dst->_data);
- return nr;
-}
-
static inline int sort_keys_cmp(struct btree *b,
struct bkey_packed *l,
struct bkey_packed *r)
{
- return bkey_cmp_packed(b, l, r) ?:
- (int) bkey_whiteout(r) - (int) bkey_whiteout(l) ?:
+ return bch2_bkey_cmp_packed_inlined(b, l, r) ?:
+ (int) bkey_deleted(r) - (int) bkey_deleted(l) ?:
(int) l->needs_whiteout - (int) r->needs_whiteout;
}
sort_iter_sort(iter, sort_keys_cmp);
while ((in = sort_iter_next(iter, sort_keys_cmp))) {
- if (bkey_whiteout(in) &&
+ bool needs_whiteout = false;
+
+ if (bkey_deleted(in) &&
(filter_whiteouts || !in->needs_whiteout))
continue;
- if (bkey_whiteout(in) &&
- (next = sort_iter_peek(iter)) &&
- !bkey_cmp_packed(iter->b, in, next)) {
+ while ((next = sort_iter_peek(iter)) &&
+ !bch2_bkey_cmp_packed_inlined(iter->b, in, next)) {
BUG_ON(in->needs_whiteout &&
next->needs_whiteout);
- /*
- * XXX racy, called with read lock from write path
- *
- * leads to spurious BUG_ON() in bkey_unpack_key() in
- * debug mode
- */
- next->needs_whiteout |= in->needs_whiteout;
- continue;
+ needs_whiteout |= in->needs_whiteout;
+ in = sort_iter_next(iter, sort_keys_cmp);
}
- if (bkey_whiteout(in)) {
- memcpy_u64s(out, in, bkeyp_key_u64s(f, in));
+ if (bkey_deleted(in)) {
+ memcpy_u64s_small(out, in, bkeyp_key_u64s(f, in));
set_bkeyp_val_u64s(f, out, 0);
} else {
bkey_copy(out, in);
}
- out = bkey_next(out);
- }
-
- return (u64 *) out - (u64 *) dst;
-}
-
-static inline int sort_extents_cmp(struct btree *b,
- struct bkey_packed *l,
- struct bkey_packed *r)
-{
- return bkey_cmp_packed(b, l, r) ?:
- (int) bkey_deleted(l) - (int) bkey_deleted(r);
-}
-
-unsigned bch2_sort_extents(struct bkey_packed *dst,
- struct sort_iter *iter,
- bool filter_whiteouts)
-{
- struct bkey_packed *in, *out = dst;
-
- sort_iter_sort(iter, sort_extents_cmp);
-
- while ((in = sort_iter_next(iter, sort_extents_cmp))) {
- if (bkey_deleted(in))
- continue;
-
- if (bkey_whiteout(in) &&
- (filter_whiteouts || !in->needs_whiteout))
- continue;
-
- bkey_copy(out, in);
- out = bkey_next(out);
- }
-
- return (u64 *) out - (u64 *) dst;
-}
-
-static inline int sort_key_whiteouts_cmp(struct btree *b,
- struct bkey_packed *l,
- struct bkey_packed *r)
-{
- return bkey_cmp_packed(b, l, r);
-}
-
-unsigned bch2_sort_key_whiteouts(struct bkey_packed *dst,
- struct sort_iter *iter)
-{
- struct bkey_packed *in, *out = dst;
-
- sort_iter_sort(iter, sort_key_whiteouts_cmp);
-
- while ((in = sort_iter_next(iter, sort_key_whiteouts_cmp))) {
- bkey_copy(out, in);
- out = bkey_next(out);
- }
-
- return (u64 *) out - (u64 *) dst;
-}
-
-static inline int sort_extent_whiteouts_cmp(struct btree *b,
- struct bkey_packed *l,
- struct bkey_packed *r)
-{
- struct bkey ul = bkey_unpack_key(b, l);
- struct bkey ur = bkey_unpack_key(b, r);
-
- return bkey_cmp(bkey_start_pos(&ul), bkey_start_pos(&ur));
-}
-
-unsigned bch2_sort_extent_whiteouts(struct bkey_packed *dst,
- struct sort_iter *iter)
-{
- const struct bkey_format *f = &iter->b->format;
- struct bkey_packed *in, *out = dst;
- struct bkey_i l, r;
- bool prev = false, l_packed = false;
- u64 max_packed_size = bkey_field_max(f, BKEY_FIELD_SIZE);
- u64 max_packed_offset = bkey_field_max(f, BKEY_FIELD_OFFSET);
- u64 new_size;
-
- max_packed_size = min_t(u64, max_packed_size, KEY_SIZE_MAX);
-
- sort_iter_sort(iter, sort_extent_whiteouts_cmp);
-
- while ((in = sort_iter_next(iter, sort_extent_whiteouts_cmp))) {
- if (bkey_deleted(in))
- continue;
-
- EBUG_ON(bkeyp_val_u64s(f, in));
- EBUG_ON(in->type != KEY_TYPE_discard);
-
- r.k = bkey_unpack_key(iter->b, in);
-
- if (prev &&
- bkey_cmp(l.k.p, bkey_start_pos(&r.k)) >= 0) {
- if (bkey_cmp(l.k.p, r.k.p) >= 0)
- continue;
-
- new_size = l_packed
- ? min(max_packed_size, max_packed_offset -
- bkey_start_offset(&l.k))
- : KEY_SIZE_MAX;
-
- new_size = min(new_size, r.k.p.offset -
- bkey_start_offset(&l.k));
-
- BUG_ON(new_size < l.k.size);
-
- bch2_key_resize(&l.k, new_size);
-
- if (bkey_cmp(l.k.p, r.k.p) >= 0)
- continue;
-
- bch2_cut_front(l.k.p, &r);
- }
-
- if (prev) {
- if (!bch2_bkey_pack(out, &l, f)) {
- BUG_ON(l_packed);
- bkey_copy(out, &l);
- }
- out = bkey_next(out);
- }
-
- l = r;
- prev = true;
- l_packed = bkey_packed(in);
- }
-
- if (prev) {
- if (!bch2_bkey_pack(out, &l, f)) {
- BUG_ON(l_packed);
- bkey_copy(out, &l);
- }
- out = bkey_next(out);
+ out->needs_whiteout |= needs_whiteout;
+ out = bkey_p_next(out);
}
return (u64 *) out - (u64 *) dst;
projects / bcachefs-tools-debian / blobdiff