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Refactor resolving fast path

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Signed-off-by: Avi Halaf <avi.halaf@huawei.com>
Signed-off-by: Robert Baldyga <robert.baldyga@huawei.com>
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@huawei.com>
This commit is contained in:
Avi Halaf 2023-08-30 13:26:38 +03:00 committed by Michal Mielewczyk
parent d24e7bac5d
commit bd06b1c9b8
1 changed files with 34 additions and 27 deletions
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61
src/ocf_core.c
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@ -218,41 +218,48 @@ static void ocf_req_complete(struct ocf_request *req, int error)
ocf_io_put(&req->ioi.io);
}
static int ocf_core_submit_io_fast(struct ocf_io *io, struct ocf_request *req,
ocf_core_t core, ocf_cache_t cache)
static inline ocf_req_cache_mode_t _ocf_core_req_resolve_fast_mode(
ocf_cache_t cache, struct ocf_request *req)
{
ocf_req_cache_mode_t original_cache_mode;
int fast;
switch (req->cache_mode) {
case ocf_req_cache_mode_wb:
case ocf_req_cache_mode_wo:
return ocf_req_cache_mode_fast;
default:
break;
}
if (!cache->use_submit_io_fast)
return ocf_req_cache_mode_max;
return ocf_req_cache_mode_fast;
}
static int ocf_core_submit_io_fast(struct ocf_io *io, struct ocf_request *req,
ocf_cache_t cache)
{
ocf_req_cache_mode_t original_mode, resolved_mode;
int ret;
if (req->d2c) {
return -OCF_ERR_IO;
return OCF_FAST_PATH_NO;
}
original_cache_mode = req->cache_mode;
if (req->cache_mode == ocf_req_cache_mode_pt)
return OCF_FAST_PATH_NO;
switch (req->cache_mode) {
case ocf_req_cache_mode_pt:
return -OCF_ERR_IO;
case ocf_req_cache_mode_wb:
case ocf_req_cache_mode_wo:
req->cache_mode = ocf_req_cache_mode_fast;
break;
default:
if (cache->use_submit_io_fast)
break;
resolved_mode = _ocf_core_req_resolve_fast_mode(cache, req);
if (resolved_mode == ocf_req_cache_mode_max)
return OCF_FAST_PATH_NO;
if (io->dir == OCF_WRITE)
return -OCF_ERR_IO;
original_mode = req->cache_mode;
req->cache_mode = resolved_mode;
req->cache_mode = ocf_req_cache_mode_fast;
}
ret = ocf_engine_hndl_fast_req(req);
if (ret == OCF_FAST_PATH_NO)
req->cache_mode = original_mode;
fast = ocf_engine_hndl_fast_req(req);
if (fast != OCF_FAST_PATH_NO)
return 0;
req->cache_mode = original_cache_mode;
return -OCF_ERR_IO;
return ret;
}
static void ocf_core_volume_submit_io(struct ocf_io *io)
@ -297,7 +304,7 @@ static void ocf_core_volume_submit_io(struct ocf_io *io)
/* Prevent race condition */
ocf_req_get(req);
if (!ocf_core_submit_io_fast(io, req, core, cache)) {
if (ocf_core_submit_io_fast(io, req, cache) == OCF_FAST_PATH_YES) {
ocf_core_seq_cutoff_update(core, req);
ocf_req_put(req);
return;