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nvme/tcp: use new async+poll APIs for fabrics connect

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The fabric connect command is now sent without.  It will make it
possible to make `nvme_tcp_ctrlr_connect_qpair()` non-blocking too by
moving the polling to process_completions (this will be done in
subsequent patches).  Additionally, two extra states,
`NVME_TCP_QPAIR_STATE_FABRIC_CONNECT_SEND` and
`NVME_TCP_QPAIR_STATE_FABRIC_CONNECT_POLL`, were added to keep track of
the state of the connect command.  These states are only used by the
initiator code, as the target doesn't need them.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com>
Change-Id: I25c16501e28bb3fbfde416b7c9214f42eb126358
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/8605
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
This commit is contained in:
Jim Harris 2021-06-08 19:33:58 +00:00 committed by Tomasz Zawadzki
parent 7e21385f8a
commit b49fa72b22
4 changed files with 41 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
include/spdk_internal/nvme_tcp.h
View File

@ -160,9 +160,11 @@ enum nvme_tcp_error_codes {
enum nvme_tcp_qpair_state {
NVME_TCP_QPAIR_STATE_INVALID = 0,
NVME_TCP_QPAIR_STATE_INITIALIZING = 1,
NVME_TCP_QPAIR_STATE_RUNNING = 2,
NVME_TCP_QPAIR_STATE_EXITING = 3,
NVME_TCP_QPAIR_STATE_EXITED = 4,
NVME_TCP_QPAIR_STATE_FABRIC_CONNECT_SEND = 2,
NVME_TCP_QPAIR_STATE_FABRIC_CONNECT_POLL = 3,
NVME_TCP_QPAIR_STATE_RUNNING = 4,
NVME_TCP_QPAIR_STATE_EXITING = 5,
NVME_TCP_QPAIR_STATE_EXITED = 6,
};
static const bool g_nvme_tcp_hdgst[] = {

36
lib/nvme/nvme_tcp.c
View File

@ -851,6 +851,19 @@ nvme_tcp_qpair_send_h2c_term_req(struct nvme_tcp_qpair *tqpair, struct nvme_tcp_
nvme_tcp_qpair_write_pdu(tqpair, rsp_pdu, nvme_tcp_qpair_send_h2c_term_req_complete, tqpair);
}
static bool
nvme_tcp_qpair_recv_state_valid(struct nvme_tcp_qpair *tqpair)
{
switch (tqpair->state) {
case NVME_TCP_QPAIR_STATE_FABRIC_CONNECT_SEND:
case NVME_TCP_QPAIR_STATE_FABRIC_CONNECT_POLL:
case NVME_TCP_QPAIR_STATE_RUNNING:
return true;
default:
return false;
}
}
static void
nvme_tcp_pdu_ch_handle(struct nvme_tcp_qpair *tqpair)
{
@ -874,7 +887,7 @@ nvme_tcp_pdu_ch_handle(struct nvme_tcp_qpair *tqpair)
plen_error = true;
}
} else {
if (tqpair->state != NVME_TCP_QPAIR_STATE_RUNNING) {
if (spdk_unlikely(!nvme_tcp_qpair_recv_state_valid(tqpair))) {
SPDK_ERRLOG("The TCP/IP tqpair connection is not negotitated\n");
fes = SPDK_NVME_TCP_TERM_REQ_FES_PDU_SEQUENCE_ERROR;
goto err;
@ -1147,7 +1160,7 @@ nvme_tcp_send_icreq_complete(void *cb_arg)
if (tqpair->state == NVME_TCP_QPAIR_STATE_INITIALIZING) {
SPDK_DEBUGLOG(nvme, "tqpair %p %u, finilize icresp\n", tqpair, tqpair->qpair.id);
tqpair->state = NVME_TCP_QPAIR_STATE_RUNNING;
tqpair->state = NVME_TCP_QPAIR_STATE_FABRIC_CONNECT_SEND;
}
}
@ -1218,7 +1231,7 @@ nvme_tcp_icresp_handle(struct nvme_tcp_qpair *tqpair,
return;
}
tqpair->state = NVME_TCP_QPAIR_STATE_RUNNING;
tqpair->state = NVME_TCP_QPAIR_STATE_FABRIC_CONNECT_SEND;
return;
end:
nvme_tcp_qpair_send_h2c_term_req(tqpair, pdu, fes, error_offset);
@ -1926,13 +1939,26 @@ nvme_tcp_ctrlr_connect_qpair_poll(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvm
SPDK_ERRLOG("Failed to construct the tqpair=%p via correct icresp\n", tqpair);
}
break;
case NVME_TCP_QPAIR_STATE_RUNNING:
rc = nvme_fabric_qpair_connect(&tqpair->qpair, tqpair->num_entries);
case NVME_TCP_QPAIR_STATE_FABRIC_CONNECT_SEND:
rc = nvme_fabric_qpair_connect_async(&tqpair->qpair, tqpair->num_entries);
if (rc < 0) {
SPDK_ERRLOG("Failed to send an NVMe-oF Fabric CONNECT command\n");
break;
}
tqpair->state = NVME_TCP_QPAIR_STATE_FABRIC_CONNECT_POLL;
rc = -EAGAIN;
break;
case NVME_TCP_QPAIR_STATE_FABRIC_CONNECT_POLL:
rc = nvme_fabric_qpair_connect_poll(&tqpair->qpair);
if (rc == 0) {
tqpair->state = NVME_TCP_QPAIR_STATE_RUNNING;
nvme_qpair_set_state(qpair, NVME_QPAIR_CONNECTED);
} else if (rc != -EAGAIN) {
SPDK_ERRLOG("Failed to poll NVMe-oF Fabric CONNECT command\n");
}
break;
case NVME_TCP_QPAIR_STATE_RUNNING:
rc = 0;
break;
default:
assert(false);

3
test/common/lib/nvme/common_stubs.h
View File

@ -105,6 +105,9 @@ DEFINE_STUB(nvme_fabric_ctrlr_scan, int, (struct spdk_nvme_probe_ctx *probe_ctx,
bool direct_connect), 0);
DEFINE_STUB(nvme_fabric_qpair_connect, int, (struct spdk_nvme_qpair *qpair, uint32_t num_entries),
0);
DEFINE_STUB(nvme_fabric_qpair_connect_async, int, (struct spdk_nvme_qpair *qpair,
uint32_t num_entries), 0);
DEFINE_STUB(nvme_fabric_qpair_connect_poll, int, (struct spdk_nvme_qpair *qpair), 0);
DEFINE_STUB_V(nvme_transport_ctrlr_disconnect_qpair, (struct spdk_nvme_ctrlr *ctrlr,
struct spdk_nvme_qpair *qpair));
DEFINE_STUB(nvme_poll_group_disconnect_qpair, int, (struct spdk_nvme_qpair *qpair), 0);

2
test/unit/lib/nvme/nvme_tcp.c/nvme_tcp_ut.c
View File

@ -1279,7 +1279,7 @@ test_nvme_tcp_icresp_handle(void)
nvme_tcp_icresp_handle(&tqpair, &pdu);
CU_ASSERT(tqpair.recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
CU_ASSERT(tqpair.state == NVME_TCP_QPAIR_STATE_RUNNING);
CU_ASSERT(tqpair.state == NVME_TCP_QPAIR_STATE_FABRIC_CONNECT_SEND);
CU_ASSERT(tqpair.maxh2cdata == pdu.hdr.ic_resp.maxh2cdata);
CU_ASSERT(tqpair.cpda == pdu.hdr.ic_resp.cpda);
CU_ASSERT(tqpair.flags.host_hdgst_enable == pdu.hdr.ic_resp.dgst.bits.hdgst_enable);