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nvmf: Add spdk_nvmf_request_get/free_buffers() usable among transports

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This patch adds new APIs spdk_nvmf_request_get_buffers() and
spdk_nvmf_request_free_buffers() to be used among transports.
Subsequent patches will replace transport specific APIs by them.

Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: Ib153e2c5806b7276915a0aa91179fe9dbcb2a1f0
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/465874
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Anil Veerabhadrappa <anil.veerabhadrappa@broadcom.com>
Reviewed-by: Broadcom SPDK FC-NVMe CI <spdk-ci.pdl@broadcom.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Shuhei Matsumoto 2019-08-21 14:36:13 +09:00 committed by Ben Walker
parent 005b053a02
commit cc4d1f82cc
2 changed files with 64 additions and 0 deletions
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9
lib/nvmf/nvmf_internal.h
View File

@ -382,6 +382,15 @@ void spdk_nvmf_request_exec(struct spdk_nvmf_request *req);
int spdk_nvmf_request_free(struct spdk_nvmf_request *req);
int spdk_nvmf_request_complete(struct spdk_nvmf_request *req);
void spdk_nvmf_request_free_buffers(struct spdk_nvmf_request *req,
struct spdk_nvmf_transport_poll_group *group,
struct spdk_nvmf_transport *transport,
uint32_t num_buffers);
int spdk_nvmf_request_get_buffers(struct spdk_nvmf_request *req,
struct spdk_nvmf_transport_poll_group *group,
struct spdk_nvmf_transport *transport,
uint32_t num_buffers);
bool spdk_nvmf_request_get_dif_ctx(struct spdk_nvmf_request *req, struct spdk_dif_ctx *dif_ctx);
void spdk_nvmf_get_discovery_log_page(struct spdk_nvmf_tgt *tgt, const char *hostnqn,

55
lib/nvmf/transport.c
View File

@ -359,3 +359,58 @@ spdk_nvmf_transport_poll_group_free_stat(struct spdk_nvmf_transport *transport,
transport->ops->poll_group_free_stat(stat);
}
}
void
spdk_nvmf_request_free_buffers(struct spdk_nvmf_request *req,
struct spdk_nvmf_transport_poll_group *group,
struct spdk_nvmf_transport *transport,
uint32_t num_buffers)
{
uint32_t i;
for (i = 0; i < num_buffers; i++) {
if (group->buf_cache_count < group->buf_cache_size) {
STAILQ_INSERT_HEAD(&group->buf_cache,
(struct spdk_nvmf_transport_pg_cache_buf *)req->buffers[i],
link);
group->buf_cache_count++;
} else {
spdk_mempool_put(transport->data_buf_pool, req->buffers[i]);
}
req->iov[i].iov_base = NULL;
req->buffers[i] = NULL;
req->iov[i].iov_len = 0;
}
req->data_from_pool = false;
}
int
spdk_nvmf_request_get_buffers(struct spdk_nvmf_request *req,
struct spdk_nvmf_transport_poll_group *group,
struct spdk_nvmf_transport *transport,
uint32_t num_buffers)
{
uint32_t i = 0;
while (i < num_buffers) {
if (!(STAILQ_EMPTY(&group->buf_cache))) {
group->buf_cache_count--;
req->buffers[i] = STAILQ_FIRST(&group->buf_cache);
STAILQ_REMOVE_HEAD(&group->buf_cache, link);
assert(req->buffers[i] != NULL);
i++;
} else {
if (spdk_mempool_get_bulk(transport->data_buf_pool, &req->buffers[i],
num_buffers - i)) {
goto err_exit;
}
i += num_buffers - i;
}
}
return 0;
err_exit:
spdk_nvmf_request_free_buffers(req, group, transport, i);
return -ENOMEM;
}