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Fix reads from intent writes

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This commit is contained in:
Vitaliy Filippov
2025-12-02 01:52:12 +03:00
parent 7ea4884ef6
commit 62995243f3
1 changed files with 10 additions and 6 deletions
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src/blockstore/blockstore_read.cpp
+10 -6
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@@ -34,7 +34,9 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *op)
}
}
fulfilled += prepare_read(PRIV(op)->read_vec, obj, wr, op->offset, op->offset+op->len);
if (fulfilled == op->len)
if (fulfilled == op->len ||
wr->flags == (BS_HEAP_BIG_WRITE|BS_HEAP_STABLE) ||
wr->flags == (BS_HEAP_TOMBSTONE|BS_HEAP_STABLE))
{
break;
}
@@ -109,7 +111,7 @@ int blockstore_impl_t::fulfill_read(blockstore_op_t *op)
uint32_t blockstore_impl_t::prepare_read(std::vector<copy_buffer_t> & read_vec, heap_object_t *obj, heap_write_t *wr, uint32_t start, uint32_t end)
{
if (wr->offset >= end || wr->offset+wr->len <= start || (wr->flags & BS_HEAP_TYPE) == BS_HEAP_INTENT_WRITE)
if (wr->offset >= end || wr->offset+wr->len <= start)
{
return 0;
}
@@ -131,10 +133,10 @@ uint32_t blockstore_impl_t::prepare_read_with_bitmaps(std::vector<copy_buffer_t>
// BIG_WRITEs contain a bitmap and we have to handle its holes at the upper level, especially with padded checksums
uint32_t res = 0;
uint8_t *bmp = wr->get_int_bitmap(heap);
uint64_t bmp_start = 0, bmp_end = 0, bmp_size = dsk.data_block_size/dsk.bitmap_granularity;
uint32_t bmp_start = 0, bmp_end = 0, bmp_size = dsk.data_block_size/dsk.bitmap_granularity;
while (bmp_start < bmp_size)
{
while (!(bmp[bmp_end >> 3] & (1 << (bmp_end & 0x7))) && bmp_end < bmp_size)
while (bmp_end < bmp_size && !(bmp[bmp_end >> 3] & (1 << (bmp_end & 0x7))))
{
bmp_end++;
}
@@ -143,7 +145,7 @@ uint32_t blockstore_impl_t::prepare_read_with_bitmaps(std::vector<copy_buffer_t>
res += prepare_read_zero(read_vec, bmp_start * dsk.bitmap_granularity, bmp_end * dsk.bitmap_granularity);
}
bmp_start = bmp_end;
while (bmp[bmp_end >> 3] & (1 << (bmp_end & 0x7)) && bmp_end < bmp_size)
while (bmp_end < bmp_size && (bmp[bmp_end >> 3] & (1 << (bmp_end & 0x7))))
{
bmp_end++;
}
@@ -248,11 +250,13 @@ uint32_t blockstore_impl_t::prepare_read_simple(std::vector<copy_buffer_t> & rea
void blockstore_impl_t::prepare_disk_read(std::vector<copy_buffer_t> & read_vec, int & pos, heap_object_t *obj, heap_write_t *wr,
uint32_t blk_start, uint32_t blk_end, uint32_t start, uint32_t end, uint32_t copy_flags)
{
// Only one INTENT_WRITE is allowed at a time
assert(wr->flags != (BS_HEAP_INTENT_WRITE|BS_HEAP_STABLE) || wr->next()->flags == (BS_HEAP_BIG_WRITE|BS_HEAP_STABLE));
copy_buffer_t vec = {
.copy_flags = ((wr->flags & BS_HEAP_TYPE) == BS_HEAP_SMALL_WRITE ? COPY_BUF_JOURNAL : COPY_BUF_DATA) | copy_flags,
.offset = start,
.len = end-start,
.disk_offset = wr->location + blk_start - wr->offset,
.disk_offset = ((wr->flags & BS_HEAP_TYPE) == BS_HEAP_INTENT_WRITE ? wr->next()->location : wr->location) + blk_start - wr->offset,
.disk_len = blk_end - blk_start,
.wr_lsn = wr->lsn,
};