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Implement Vitastor ublk server

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This commit is contained in:
Vitaliy Filippov
2025-08-24 16:55:58 +03:00
parent 2ebe3a468c
commit 31b7021330
13 changed files with 1710 additions and 6 deletions
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src/util/ringloop.cpp
+10 -4
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@@ -10,10 +10,15 @@
#include "ringloop.h"
ring_loop_t::ring_loop_t(int qd, bool multithreaded)
ring_loop_t::ring_loop_t(int qd, bool multithreaded, bool sqe128)
{
mt = multithreaded;
int ret = io_uring_queue_init(qd, &ring, 0);
io_uring_params params = {};
if (sqe128)
{
params.flags = IORING_SETUP_SQE128;
}
int ret = io_uring_queue_init_params(qd, &ring, &params);
if (ret < 0)
{
throw std::runtime_error(std::string("io_uring_queue_init: ") + strerror(-ret));
@@ -179,7 +184,8 @@ unsigned ring_loop_t::save()
void ring_loop_t::restore(unsigned sqe_tail)
{
assert(ring.sq.sqe_tail >= sqe_tail);
for (unsigned i = sqe_tail; i < ring.sq.sqe_tail; i++)
unsigned inc = (1 << io_uring_sqe_shift(&ring));
for (unsigned i = sqe_tail; i < ring.sq.sqe_tail; i += inc)
{
free_ring_data[free_ring_data_ptr++] = ((ring_data_t*)ring.sq.sqes[i & *ring.sq.kring_mask].user_data) - ring_datas;
}
@@ -191,7 +197,7 @@ int ring_loop_t::sqes_left()
struct io_uring_sq *sq = &ring.sq;
unsigned int head = io_uring_smp_load_acquire(sq->khead);
unsigned int next = sq->sqe_tail + 1;
int left = *sq->kring_entries - (next - head);
int left = (*sq->kring_entries - (next - head)) >> io_uring_sqe_shift(&ring);
if (left > free_ring_data_ptr)
{
// return min(sqes left, ring_datas left)