Simplified distributed block storage with strong consistency, like in Ceph
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#pragma once
class blockstore_init_meta
{
blockstore_impl_t *bs;
int wait_state = 0, wait_count = 0;
void *metadata_buffer = NULL;
uint64_t metadata_read = 0;
int prev = 0, prev_done = 0, done_len = 0, submitted = 0;
uint64_t done_cnt = 0, done_pos = 0;
uint64_t entries_loaded = 0;
struct io_uring_sqe *sqe;
struct ring_data_t *data;
void handle_entries(void *entries, unsigned count, int block_order);
void handle_event(ring_data_t *data);
public:
blockstore_init_meta(blockstore_impl_t *bs);
int loop();
};
struct bs_init_journal_done
{
void *buf;
uint64_t pos, len;
};
class blockstore_init_journal
{
blockstore_impl_t *bs;
int wait_state = 0, wait_count = 0, handle_res = 0;
uint64_t entries_loaded = 0;
uint32_t crc32_last = 0;
bool started = false;
uint64_t next_free;
std::vector<bs_init_journal_done> done;
uint64_t journal_pos = 0;
uint64_t continue_pos = 0;
void *init_write_buf = NULL;
uint64_t init_write_sector = 0;
bool wrapped = false;
void *submitted_buf;
struct io_uring_sqe *sqe;
struct ring_data_t *data;
journal_entry_start *je_start;
std::function<void(ring_data_t*)> simple_callback;
int handle_journal_part(void *buf, uint64_t done_pos, uint64_t len);
void handle_event(ring_data_t *data);
public:
blockstore_init_journal(blockstore_impl_t* bs);
int loop();
};