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numam-spdk/lib/nvmf/tcp.c
Shuhei Matsumoto 8448adaefa nvmf/tcp: Verify DIF before sending C2H data in spdk_nvmf_tcp_send_c2h_data 
If DIF mode is local and C2H data is extended LBA payload, DIF should
be verified just before sending the payload.

Add a helper function nvmf_tcp_pdu_verify_dif and call it in
spdk_nvmf_tcp_send_c2h_data after completing nvme_tcp_pdu_set_data_buf.

When nvmf_tcp_pdu_verify_dif returns error, treat the error as fatal
transport error because the error is caused by the target itself.

Handle the fatal NVMe/TCP transport error by terminating the connection
as described in the NVMe specification.

On the other hand, data digest error is treated as a non-fatal transport
error because the error is caused outside the target. This is reasonable.

Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: I9680af2556c08f5888aeaf0a772097e4744182be
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/458921
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
2019-07-08 03:33:07 +00:00

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/*-
* BSD LICENSE
*
* Copyright (c) Intel Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "spdk/stdinc.h"
#include "spdk/crc32.h"
#include "spdk/endian.h"
#include "spdk/assert.h"
#include "spdk/thread.h"
#include "spdk/nvmf.h"
#include "spdk/nvmf_spec.h"
#include "spdk/sock.h"
#include "spdk/string.h"
#include "spdk/trace.h"
#include "spdk/util.h"
#include "nvmf_internal.h"
#include "transport.h"
#include "spdk_internal/log.h"
#include "spdk_internal/nvme_tcp.h"
#define NVMF_TCP_MAX_ACCEPT_SOCK_ONE_TIME 16
#define NVMF_TCP_PDU_MAX_H2C_DATA_SIZE 131072
#define NVMF_TCP_PDU_MAX_C2H_DATA_SIZE 131072
#define NVMF_TCP_QPAIR_MAX_C2H_PDU_NUM 64 /* Maximal c2h_data pdu number for ecah tqpair */
/* spdk nvmf related structure */
enum spdk_nvmf_tcp_req_state {
/* The request is not currently in use */
TCP_REQUEST_STATE_FREE = 0,
/* Initial state when request first received */
TCP_REQUEST_STATE_NEW,
/* The request is queued until a data buffer is available. */
TCP_REQUEST_STATE_NEED_BUFFER,
/* The request is currently transferring data from the host to the controller. */
TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER,
/* The request is ready to execute at the block device */
TCP_REQUEST_STATE_READY_TO_EXECUTE,
/* The request is currently executing at the block device */
TCP_REQUEST_STATE_EXECUTING,
/* The request finished executing at the block device */
TCP_REQUEST_STATE_EXECUTED,
/* The request is ready to send a completion */
TCP_REQUEST_STATE_READY_TO_COMPLETE,
/* The request is currently transferring final pdus from the controller to the host. */
TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST,
/* The request completed and can be marked free. */
TCP_REQUEST_STATE_COMPLETED,
/* Terminator */
TCP_REQUEST_NUM_STATES,
};
static const char *spdk_nvmf_tcp_term_req_fes_str[] = {
"Invalid PDU Header Field",
"PDU Sequence Error",
"Header Digiest Error",
"Data Transfer Out of Range",
"R2T Limit Exceeded",
"Unsupported parameter",
};
#define OBJECT_NVMF_TCP_IO 0x80
#define TRACE_GROUP_NVMF_TCP 0x5
#define TRACE_TCP_REQUEST_STATE_NEW SPDK_TPOINT_ID(TRACE_GROUP_NVMF_TCP, 0x0)
#define TRACE_TCP_REQUEST_STATE_NEED_BUFFER SPDK_TPOINT_ID(TRACE_GROUP_NVMF_TCP, 0x1)
#define TRACE_TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER SPDK_TPOINT_ID(TRACE_GROUP_NVMF_TCP, 0x2)
#define TRACE_TCP_REQUEST_STATE_READY_TO_EXECUTE SPDK_TPOINT_ID(TRACE_GROUP_NVMF_TCP, 0x3)
#define TRACE_TCP_REQUEST_STATE_EXECUTING SPDK_TPOINT_ID(TRACE_GROUP_NVMF_TCP, 0x4)
#define TRACE_TCP_REQUEST_STATE_EXECUTED SPDK_TPOINT_ID(TRACE_GROUP_NVMF_TCP, 0x5)
#define TRACE_TCP_REQUEST_STATE_READY_TO_COMPLETE SPDK_TPOINT_ID(TRACE_GROUP_NVMF_TCP, 0x6)
#define TRACE_TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST SPDK_TPOINT_ID(TRACE_GROUP_NVMF_TCP, 0x7)
#define TRACE_TCP_REQUEST_STATE_COMPLETED SPDK_TPOINT_ID(TRACE_GROUP_NVMF_TCP, 0x8)
#define TRACE_TCP_FLUSH_WRITEBUF_START SPDK_TPOINT_ID(TRACE_GROUP_NVMF_TCP, 0x9)
#define TRACE_TCP_FLUSH_WRITEBUF_DONE SPDK_TPOINT_ID(TRACE_GROUP_NVMF_TCP, 0xA)
#define TRACE_TCP_READ_FROM_SOCKET_DONE SPDK_TPOINT_ID(TRACE_GROUP_NVMF_TCP, 0xB)
SPDK_TRACE_REGISTER_FN(nvmf_tcp_trace, "nvmf_tcp", TRACE_GROUP_NVMF_TCP)
{
spdk_trace_register_object(OBJECT_NVMF_TCP_IO, 'r');
spdk_trace_register_description("TCP_REQ_NEW",
TRACE_TCP_REQUEST_STATE_NEW,
OWNER_NONE, OBJECT_NVMF_TCP_IO, 1, 1, "");
spdk_trace_register_description("TCP_REQ_NEED_BUFFER",
TRACE_TCP_REQUEST_STATE_NEED_BUFFER,
OWNER_NONE, OBJECT_NVMF_TCP_IO, 0, 1, "");
spdk_trace_register_description("TCP_REQ_TX_H_TO_C",
TRACE_TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER,
OWNER_NONE, OBJECT_NVMF_TCP_IO, 0, 1, "");
spdk_trace_register_description("TCP_REQ_RDY_TO_EXECUTE",
TRACE_TCP_REQUEST_STATE_READY_TO_EXECUTE,
OWNER_NONE, OBJECT_NVMF_TCP_IO, 0, 1, "");
spdk_trace_register_description("TCP_REQ_EXECUTING",
TRACE_TCP_REQUEST_STATE_EXECUTING,
OWNER_NONE, OBJECT_NVMF_TCP_IO, 0, 1, "");
spdk_trace_register_description("TCP_REQ_EXECUTED",
TRACE_TCP_REQUEST_STATE_EXECUTED,
OWNER_NONE, OBJECT_NVMF_TCP_IO, 0, 1, "");
spdk_trace_register_description("TCP_REQ_RDY_TO_COMPLETE",
TRACE_TCP_REQUEST_STATE_READY_TO_COMPLETE,
OWNER_NONE, OBJECT_NVMF_TCP_IO, 0, 1, "");
spdk_trace_register_description("TCP_REQ_TRANSFER_C2H",
TRACE_TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST,
OWNER_NONE, OBJECT_NVMF_TCP_IO, 0, 1, "");
spdk_trace_register_description("TCP_REQ_COMPLETED",
TRACE_TCP_REQUEST_STATE_COMPLETED,
OWNER_NONE, OBJECT_NVMF_TCP_IO, 0, 1, "");
spdk_trace_register_description("TCP_WRITE_START",
TRACE_TCP_FLUSH_WRITEBUF_START,
OWNER_NONE, OBJECT_NONE, 0, 0, "");
spdk_trace_register_description("TCP_WRITE_DONE",
TRACE_TCP_FLUSH_WRITEBUF_DONE,
OWNER_NONE, OBJECT_NONE, 0, 0, "");
spdk_trace_register_description("TCP_READ_DONE",
TRACE_TCP_READ_FROM_SOCKET_DONE,
OWNER_NONE, OBJECT_NONE, 0, 0, "");
}
struct spdk_nvmf_tcp_req {
struct spdk_nvmf_request req;
struct spdk_nvme_cpl rsp;
struct spdk_nvme_cmd cmd;
/* In-capsule data buffer */
uint8_t *buf;
bool data_from_pool;
bool has_incapsule_data;
/* transfer_tag */
uint16_t ttag;
enum spdk_nvmf_tcp_req_state state;
void *buffers[SPDK_NVMF_MAX_SGL_ENTRIES];
/*
* next_expected_r2t_offset is used when we receive the h2c_data PDU.
*/
uint32_t next_expected_r2t_offset;
uint32_t r2tl_remain;
/*
* c2h_data_offset is used when we send the c2h_data PDU.
*/
uint32_t c2h_data_offset;
uint32_t c2h_data_pdu_num;
TAILQ_ENTRY(spdk_nvmf_tcp_req) link;
TAILQ_ENTRY(spdk_nvmf_tcp_req) state_link;
};
struct spdk_nvmf_tcp_qpair {
struct spdk_nvmf_qpair qpair;
struct spdk_nvmf_tcp_poll_group *group;
struct spdk_nvmf_tcp_port *port;
struct spdk_sock *sock;
struct spdk_poller *flush_poller;
enum nvme_tcp_pdu_recv_state recv_state;
enum nvme_tcp_qpair_state state;
struct nvme_tcp_pdu pdu_in_progress;
TAILQ_HEAD(, nvme_tcp_pdu) send_queue;
TAILQ_HEAD(, nvme_tcp_pdu) free_queue;
struct nvme_tcp_pdu *pdu;
struct nvme_tcp_pdu *pdu_pool;
uint16_t free_pdu_num;
/* Queues to track the requests in all states */
TAILQ_HEAD(, spdk_nvmf_tcp_req) state_queue[TCP_REQUEST_NUM_STATES];
/* Number of requests in each state */
int32_t state_cntr[TCP_REQUEST_NUM_STATES];
TAILQ_HEAD(, spdk_nvmf_tcp_req) queued_c2h_data_tcp_req;
uint8_t cpda;
/* Array of size "max_queue_depth * InCapsuleDataSize" containing
* buffers to be used for in capsule data.
*/
void *buf;
void *bufs;
struct spdk_nvmf_tcp_req *req;
struct spdk_nvmf_tcp_req *reqs;
bool host_hdgst_enable;
bool host_ddgst_enable;
/* The maximum number of I/O outstanding on this connection at one time */
uint16_t max_queue_depth;
/** Specifies the maximum number of PDU-Data bytes per H2C Data Transfer PDU */
uint32_t maxh2cdata;
uint32_t c2h_data_pdu_cnt;
/* IP address */
char initiator_addr[SPDK_NVMF_TRADDR_MAX_LEN];
char target_addr[SPDK_NVMF_TRADDR_MAX_LEN];
/* IP port */
uint16_t initiator_port;
uint16_t target_port;
/* Timer used to destroy qpair after detecting transport error issue if initiator does
* not close the connection.
*/
struct spdk_poller *timeout_poller;
TAILQ_ENTRY(spdk_nvmf_tcp_qpair) link;
};
struct spdk_nvmf_tcp_poll_group {
struct spdk_nvmf_transport_poll_group group;
struct spdk_sock_group *sock_group;
/* Requests that are waiting to obtain a data buffer */
TAILQ_HEAD(, spdk_nvmf_tcp_req) pending_data_buf_queue;
TAILQ_HEAD(, spdk_nvmf_tcp_qpair) qpairs;
};
struct spdk_nvmf_tcp_port {
struct spdk_nvme_transport_id trid;
struct spdk_sock *listen_sock;
uint32_t ref;
TAILQ_ENTRY(spdk_nvmf_tcp_port) link;
};
struct spdk_nvmf_tcp_transport {
struct spdk_nvmf_transport transport;
pthread_mutex_t lock;
TAILQ_HEAD(, spdk_nvmf_tcp_port) ports;
};
static void spdk_nvmf_tcp_qpair_process_pending(struct spdk_nvmf_tcp_transport *ttransport,
struct spdk_nvmf_tcp_qpair *tqpair);
static bool spdk_nvmf_tcp_req_process(struct spdk_nvmf_tcp_transport *ttransport,
struct spdk_nvmf_tcp_req *tcp_req);
static void spdk_nvmf_tcp_handle_pending_c2h_data_queue(struct spdk_nvmf_tcp_qpair *tqpair);
static void
spdk_nvmf_tcp_req_set_state(struct spdk_nvmf_tcp_req *tcp_req,
enum spdk_nvmf_tcp_req_state state)
{
struct spdk_nvmf_qpair *qpair;
struct spdk_nvmf_tcp_qpair *tqpair;
qpair = tcp_req->req.qpair;
tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
TAILQ_REMOVE(&tqpair->state_queue[tcp_req->state], tcp_req, state_link);
tqpair->state_cntr[tcp_req->state]--;
assert(tqpair->state_cntr[tcp_req->state] >= 0);
TAILQ_INSERT_TAIL(&tqpair->state_queue[state], tcp_req, state_link);
tqpair->state_cntr[state]++;
tcp_req->state = state;
}
static struct nvme_tcp_pdu *
spdk_nvmf_tcp_pdu_get(struct spdk_nvmf_tcp_qpair *tqpair)
{
struct nvme_tcp_pdu *pdu;
pdu = TAILQ_FIRST(&tqpair->free_queue);
if (!pdu) {
SPDK_ERRLOG("Unable to get PDU for tqpair=%p\n", tqpair);
abort();
return NULL;
}
tqpair->free_pdu_num--;
TAILQ_REMOVE(&tqpair->free_queue, pdu, tailq);
memset(pdu, 0, sizeof(*pdu));
pdu->ref = 1;
return pdu;
}
static void
spdk_nvmf_tcp_pdu_put(struct spdk_nvmf_tcp_qpair *tqpair, struct nvme_tcp_pdu *pdu)
{
if (!pdu) {
return;
}
assert(pdu->ref > 0);
pdu->ref--;
if (pdu->ref == 0) {
tqpair->free_pdu_num++;
TAILQ_INSERT_HEAD(&tqpair->free_queue, pdu, tailq);
}
}
static struct spdk_nvmf_tcp_req *
spdk_nvmf_tcp_req_get(struct spdk_nvmf_tcp_qpair *tqpair)
{
struct spdk_nvmf_tcp_req *tcp_req;
tcp_req = TAILQ_FIRST(&tqpair->state_queue[TCP_REQUEST_STATE_FREE]);
if (!tcp_req) {
SPDK_ERRLOG("Cannot allocate tcp_req on tqpair=%p\n", tqpair);
return NULL;
}
memset(&tcp_req->cmd, 0, sizeof(tcp_req->cmd));
memset(&tcp_req->rsp, 0, sizeof(tcp_req->rsp));
tcp_req->next_expected_r2t_offset = 0;
tcp_req->r2tl_remain = 0;
tcp_req->c2h_data_offset = 0;
tcp_req->has_incapsule_data = false;
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_NEW);
return tcp_req;
}
static void
nvmf_tcp_request_free(struct spdk_nvmf_tcp_req *tcp_req)
{
struct spdk_nvmf_tcp_transport *ttransport;
if (!tcp_req) {
return;
}
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "tcp_req=%p will be freed\n", tcp_req);
ttransport = SPDK_CONTAINEROF(tcp_req->req.qpair->transport,
struct spdk_nvmf_tcp_transport, transport);
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_COMPLETED);
spdk_nvmf_tcp_req_process(ttransport, tcp_req);
}
static int
spdk_nvmf_tcp_req_free(struct spdk_nvmf_request *req)
{
struct spdk_nvmf_tcp_req *tcp_req = SPDK_CONTAINEROF(req, struct spdk_nvmf_tcp_req, req);
nvmf_tcp_request_free(tcp_req);
return 0;
}
static void
spdk_nvmf_tcp_drain_state_queue(struct spdk_nvmf_tcp_qpair *tqpair,
enum spdk_nvmf_tcp_req_state state)
{
struct spdk_nvmf_tcp_req *tcp_req, *req_tmp;
TAILQ_FOREACH_SAFE(tcp_req, &tqpair->state_queue[state], state_link, req_tmp) {
nvmf_tcp_request_free(tcp_req);
}
}
static void
spdk_nvmf_tcp_cleanup_all_states(struct spdk_nvmf_tcp_qpair *tqpair)
{
struct spdk_nvmf_tcp_req *tcp_req, *req_tmp;
struct nvme_tcp_pdu *pdu, *tmp_pdu;
/* Free the pdus in the send_queue */
TAILQ_FOREACH_SAFE(pdu, &tqpair->send_queue, tailq, tmp_pdu) {
TAILQ_REMOVE(&tqpair->send_queue, pdu, tailq);
/* Also check the pdu type, we need to calculte the c2h_data_pdu_cnt later */
if (pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_C2H_DATA) {
assert(tqpair->c2h_data_pdu_cnt > 0);
tqpair->c2h_data_pdu_cnt--;
}
spdk_nvmf_tcp_pdu_put(tqpair, pdu);
}
TAILQ_FOREACH_SAFE(tcp_req, &tqpair->queued_c2h_data_tcp_req, link, req_tmp) {
TAILQ_REMOVE(&tqpair->queued_c2h_data_tcp_req, tcp_req, link);
}
spdk_nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST);
spdk_nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_NEW);
/* Wipe the requests waiting for buffer from the global list */
TAILQ_FOREACH_SAFE(tcp_req, &tqpair->state_queue[TCP_REQUEST_STATE_NEED_BUFFER], state_link,
req_tmp) {
TAILQ_REMOVE(&tqpair->group->pending_data_buf_queue, tcp_req, link);
}
spdk_nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_NEED_BUFFER);
spdk_nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_EXECUTING);
spdk_nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER);
}
static void
nvmf_tcp_dump_qpair_req_contents(struct spdk_nvmf_tcp_qpair *tqpair)
{
int i;
struct spdk_nvmf_tcp_req *tcp_req;
SPDK_ERRLOG("Dumping contents of queue pair (QID %d)\n", tqpair->qpair.qid);
for (i = 1; i < TCP_REQUEST_NUM_STATES; i++) {
SPDK_ERRLOG("\tNum of requests in state[%d] = %d\n", i, tqpair->state_cntr[i]);
TAILQ_FOREACH(tcp_req, &tqpair->state_queue[i], state_link) {
SPDK_ERRLOG("\t\tRequest Data From Pool: %d\n", tcp_req->data_from_pool);
SPDK_ERRLOG("\t\tRequest opcode: %d\n", tcp_req->req.cmd->nvmf_cmd.opcode);
}
}
}
static void
spdk_nvmf_tcp_qpair_destroy(struct spdk_nvmf_tcp_qpair *tqpair)
{
int err = 0;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "enter\n");
spdk_poller_unregister(&tqpair->flush_poller);
spdk_sock_close(&tqpair->sock);
spdk_nvmf_tcp_cleanup_all_states(tqpair);
if (tqpair->free_pdu_num != (tqpair->max_queue_depth + NVMF_TCP_QPAIR_MAX_C2H_PDU_NUM)) {
SPDK_ERRLOG("tqpair(%p) free pdu pool num is %u but should be %u\n", tqpair,
tqpair->free_pdu_num,
(tqpair->max_queue_depth + NVMF_TCP_QPAIR_MAX_C2H_PDU_NUM));
err++;
}
if (tqpair->state_cntr[TCP_REQUEST_STATE_FREE] != tqpair->max_queue_depth) {
SPDK_ERRLOG("tqpair(%p) free tcp request num is %u but should be %u\n", tqpair,
tqpair->state_cntr[TCP_REQUEST_STATE_FREE],
tqpair->max_queue_depth);
err++;
}
if (tqpair->c2h_data_pdu_cnt != 0) {
SPDK_ERRLOG("tqpair(%p) free c2h_data_pdu cnt is %u but should be 0\n", tqpair,
tqpair->c2h_data_pdu_cnt);
err++;
}
if (err > 0) {
nvmf_tcp_dump_qpair_req_contents(tqpair);
}
free(tqpair->pdu);
free(tqpair->pdu_pool);
free(tqpair->req);
free(tqpair->reqs);
spdk_dma_free(tqpair->buf);
spdk_dma_free(tqpair->bufs);
free(tqpair);
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "Leave\n");
}
static int
spdk_nvmf_tcp_destroy(struct spdk_nvmf_transport *transport)
{
struct spdk_nvmf_tcp_transport *ttransport;
assert(transport != NULL);
ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
pthread_mutex_destroy(&ttransport->lock);
free(ttransport);
return 0;
}
static struct spdk_nvmf_transport *
spdk_nvmf_tcp_create(struct spdk_nvmf_transport_opts *opts)
{
struct spdk_nvmf_tcp_transport *ttransport;
uint32_t sge_count;
uint32_t min_shared_buffers;
ttransport = calloc(1, sizeof(*ttransport));
if (!ttransport) {
return NULL;
}
TAILQ_INIT(&ttransport->ports);
ttransport->transport.ops = &spdk_nvmf_transport_tcp;
SPDK_NOTICELOG("*** TCP Transport Init ***\n");
SPDK_INFOLOG(SPDK_LOG_NVMF_TCP, "*** TCP Transport Init ***\n"
" Transport opts: max_ioq_depth=%d, max_io_size=%d,\n"
" max_qpairs_per_ctrlr=%d, io_unit_size=%d,\n"
" in_capsule_data_size=%d, max_aq_depth=%d\n"
" num_shared_buffers=%d, c2h_success=%d\n",
opts->max_queue_depth,
opts->max_io_size,
opts->max_qpairs_per_ctrlr,
opts->io_unit_size,
opts->in_capsule_data_size,
opts->max_aq_depth,
opts->num_shared_buffers,
opts->c2h_success);
/* I/O unit size cannot be larger than max I/O size */
if (opts->io_unit_size > opts->max_io_size) {
opts->io_unit_size = opts->max_io_size;
}
sge_count = opts->max_io_size / opts->io_unit_size;
if (sge_count > SPDK_NVMF_MAX_SGL_ENTRIES) {
SPDK_ERRLOG("Unsupported IO Unit size specified, %d bytes\n", opts->io_unit_size);
free(ttransport);
return NULL;
}
min_shared_buffers = spdk_thread_get_count() * opts->buf_cache_size;
if (min_shared_buffers > opts->num_shared_buffers) {
SPDK_ERRLOG("There are not enough buffers to satisfy"
"per-poll group caches for each thread. (%" PRIu32 ")"
"supplied. (%" PRIu32 ") required\n", opts->num_shared_buffers, min_shared_buffers);
SPDK_ERRLOG("Please specify a larger number of shared buffers\n");
spdk_nvmf_tcp_destroy(&ttransport->transport);
return NULL;
}
pthread_mutex_init(&ttransport->lock, NULL);
return &ttransport->transport;
}
static int
_spdk_nvmf_tcp_trsvcid_to_int(const char *trsvcid)
{
unsigned long long ull;
char *end = NULL;
ull = strtoull(trsvcid, &end, 10);
if (end == NULL || end == trsvcid || *end != '\0') {
return -1;
}
/* Valid TCP/IP port numbers are in [0, 65535] */
if (ull > 65535) {
return -1;
}
return (int)ull;
}
/**
* Canonicalize a listen address trid.
*/
static int
_spdk_nvmf_tcp_canon_listen_trid(struct spdk_nvme_transport_id *canon_trid,
const struct spdk_nvme_transport_id *trid)
{
int trsvcid_int;
trsvcid_int = _spdk_nvmf_tcp_trsvcid_to_int(trid->trsvcid);
if (trsvcid_int < 0) {
return -EINVAL;
}
memset(canon_trid, 0, sizeof(*canon_trid));
canon_trid->trtype = SPDK_NVME_TRANSPORT_TCP;
canon_trid->adrfam = trid->adrfam;
snprintf(canon_trid->traddr, sizeof(canon_trid->traddr), "%s", trid->traddr);
snprintf(canon_trid->trsvcid, sizeof(canon_trid->trsvcid), "%d", trsvcid_int);
return 0;
}
/**
* Find an existing listening port.
*
* Caller must hold ttransport->lock.
*/
static struct spdk_nvmf_tcp_port *
_spdk_nvmf_tcp_find_port(struct spdk_nvmf_tcp_transport *ttransport,
const struct spdk_nvme_transport_id *trid)
{
struct spdk_nvme_transport_id canon_trid;
struct spdk_nvmf_tcp_port *port;
if (_spdk_nvmf_tcp_canon_listen_trid(&canon_trid, trid) != 0) {
return NULL;
}
TAILQ_FOREACH(port, &ttransport->ports, link) {
if (spdk_nvme_transport_id_compare(&canon_trid, &port->trid) == 0) {
return port;
}
}
return NULL;
}
static int
spdk_nvmf_tcp_listen(struct spdk_nvmf_transport *transport,
const struct spdk_nvme_transport_id *trid)
{
struct spdk_nvmf_tcp_transport *ttransport;
struct spdk_nvmf_tcp_port *port;
int trsvcid_int;
uint8_t adrfam;
ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
trsvcid_int = _spdk_nvmf_tcp_trsvcid_to_int(trid->trsvcid);
if (trsvcid_int < 0) {
SPDK_ERRLOG("Invalid trsvcid '%s'\n", trid->trsvcid);
return -EINVAL;
}
pthread_mutex_lock(&ttransport->lock);
port = _spdk_nvmf_tcp_find_port(ttransport, trid);
if (port) {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "Already listening on %s port %s\n",
trid->traddr, trid->trsvcid);
port->ref++;
pthread_mutex_unlock(&ttransport->lock);
return 0;
}
port = calloc(1, sizeof(*port));
if (!port) {
SPDK_ERRLOG("Port allocation failed\n");
free(port);
pthread_mutex_unlock(&ttransport->lock);
return -ENOMEM;
}
port->ref = 1;
if (_spdk_nvmf_tcp_canon_listen_trid(&port->trid, trid) != 0) {
SPDK_ERRLOG("Invalid traddr %s / trsvcid %s\n",
trid->traddr, trid->trsvcid);
free(port);
pthread_mutex_unlock(&ttransport->lock);
return -ENOMEM;
}
port->listen_sock = spdk_sock_listen(trid->traddr, trsvcid_int);
if (port->listen_sock == NULL) {
SPDK_ERRLOG("spdk_sock_listen(%s, %d) failed: %s (%d)\n",
trid->traddr, trsvcid_int,
spdk_strerror(errno), errno);
free(port);
pthread_mutex_unlock(&ttransport->lock);
return -errno;
}
if (spdk_sock_is_ipv4(port->listen_sock)) {
adrfam = SPDK_NVMF_ADRFAM_IPV4;
} else if (spdk_sock_is_ipv6(port->listen_sock)) {
adrfam = SPDK_NVMF_ADRFAM_IPV6;
} else {
SPDK_ERRLOG("Unhandled socket type\n");
adrfam = 0;
}
if (adrfam != trid->adrfam) {
SPDK_ERRLOG("Socket address family mismatch\n");
spdk_sock_close(&port->listen_sock);
free(port);
pthread_mutex_unlock(&ttransport->lock);
return -EINVAL;
}
SPDK_NOTICELOG("*** NVMe/TCP Target Listening on %s port %d ***\n",
trid->traddr, trsvcid_int);
TAILQ_INSERT_TAIL(&ttransport->ports, port, link);
pthread_mutex_unlock(&ttransport->lock);
return 0;
}
static int
spdk_nvmf_tcp_stop_listen(struct spdk_nvmf_transport *transport,
const struct spdk_nvme_transport_id *trid)
{
struct spdk_nvmf_tcp_transport *ttransport;
struct spdk_nvmf_tcp_port *port;
int rc;
ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "Removing listen address %s port %s\n",
trid->traddr, trid->trsvcid);
pthread_mutex_lock(&ttransport->lock);
port = _spdk_nvmf_tcp_find_port(ttransport, trid);
if (port) {
assert(port->ref > 0);
port->ref--;
if (port->ref == 0) {
TAILQ_REMOVE(&ttransport->ports, port, link);
spdk_sock_close(&port->listen_sock);
free(port);
}
rc = 0;
} else {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "Port not found\n");
rc = -ENOENT;
}
pthread_mutex_unlock(&ttransport->lock);
return rc;
}
static int
spdk_nvmf_tcp_qpair_flush_pdus_internal(struct spdk_nvmf_tcp_qpair *tqpair)
{
const int array_size = 32;
struct iovec iovs[array_size];
int iovcnt = 0;
int bytes = 0;
int total_length = 0;
uint32_t mapped_length;
struct nvme_tcp_pdu *pdu;
int pdu_length;
TAILQ_HEAD(, nvme_tcp_pdu) completed_pdus_list;
struct spdk_nvmf_tcp_transport *ttransport;
pdu = TAILQ_FIRST(&tqpair->send_queue);
if (pdu == NULL) {
return 0;
}
/*
* Build up a list of iovecs for the first few PDUs in the
* tqpair 's send_queue.
*/
while (pdu != NULL && ((array_size - iovcnt) >= 3)) {
iovcnt += nvme_tcp_build_iovs(&iovs[iovcnt],
array_size - iovcnt,
pdu,
tqpair->host_hdgst_enable,
tqpair->host_ddgst_enable,
&mapped_length);
total_length += mapped_length;
pdu = TAILQ_NEXT(pdu, tailq);
}
spdk_trace_record(TRACE_TCP_FLUSH_WRITEBUF_START, 0, total_length, 0, iovcnt);
bytes = spdk_sock_writev(tqpair->sock, iovs, iovcnt);
if (bytes == -1) {
if (errno == EWOULDBLOCK || errno == EAGAIN) {
return 1;
} else {
SPDK_ERRLOG("spdk_sock_writev() failed, errno %d: %s\n",
errno, spdk_strerror(errno));
return -1;
}
}
spdk_trace_record(TRACE_TCP_FLUSH_WRITEBUF_DONE, 0, bytes, 0, 0);
pdu = TAILQ_FIRST(&tqpair->send_queue);
/*
* Free any PDUs that were fully written. If a PDU was only
* partially written, update its writev_offset so that next
* time only the unwritten portion will be sent to writev().
*/
TAILQ_INIT(&completed_pdus_list);
while (bytes > 0) {
pdu_length = pdu->hdr.common.plen - pdu->writev_offset;
if (bytes >= pdu_length) {
bytes -= pdu_length;
TAILQ_REMOVE(&tqpair->send_queue, pdu, tailq);
TAILQ_INSERT_TAIL(&completed_pdus_list, pdu, tailq);
pdu = TAILQ_FIRST(&tqpair->send_queue);
} else {
pdu->writev_offset += bytes;
bytes = 0;
}
}
while (!TAILQ_EMPTY(&completed_pdus_list)) {
pdu = TAILQ_FIRST(&completed_pdus_list);
TAILQ_REMOVE(&completed_pdus_list, pdu, tailq);
assert(pdu->cb_fn != NULL);
pdu->cb_fn(pdu->cb_arg);
spdk_nvmf_tcp_pdu_put(tqpair, pdu);
}
ttransport = SPDK_CONTAINEROF(tqpair->qpair.transport, struct spdk_nvmf_tcp_transport, transport);
spdk_nvmf_tcp_qpair_process_pending(ttransport, tqpair);
return TAILQ_EMPTY(&tqpair->send_queue) ? 0 : 1;
}
static int
spdk_nvmf_tcp_qpair_flush_pdus(void *_tqpair)
{
struct spdk_nvmf_tcp_qpair *tqpair = _tqpair;
int rc;
if (tqpair->state == NVME_TCP_QPAIR_STATE_RUNNING) {
rc = spdk_nvmf_tcp_qpair_flush_pdus_internal(tqpair);
if (rc == 0 && tqpair->flush_poller != NULL) {
spdk_poller_unregister(&tqpair->flush_poller);
} else if (rc == 1 && tqpair->flush_poller == NULL) {
tqpair->flush_poller = spdk_poller_register(spdk_nvmf_tcp_qpair_flush_pdus,
tqpair, 50);
}
} else {
/*
* If the tqpair state is not RUNNING, then
* keep trying to flush PDUs until our list is
* empty - to make sure all data is sent before
* closing the connection.
*/
do {
rc = spdk_nvmf_tcp_qpair_flush_pdus_internal(tqpair);
} while (rc == 1);
}
if (rc < 0 && tqpair->state < NVME_TCP_QPAIR_STATE_EXITING) {
/*
* If the poller has already started destruction of the tqpair,
* i.e. the socket read failed, then the connection state may already
* be EXITED. We don't want to set it back to EXITING in that case.
*/
tqpair->state = NVME_TCP_QPAIR_STATE_EXITING;
}
return -1;
}
static void
spdk_nvmf_tcp_qpair_write_pdu(struct spdk_nvmf_tcp_qpair *tqpair,
struct nvme_tcp_pdu *pdu,
nvme_tcp_qpair_xfer_complete_cb cb_fn,
void *cb_arg)
{
int enable_digest;
int hlen;
uint32_t crc32c;
hlen = pdu->hdr.common.hlen;
enable_digest = 1;
if (pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_IC_RESP ||
pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_C2H_TERM_REQ) {
/* this PDU should be sent without digest */
enable_digest = 0;
}
/* Header Digest */
if (enable_digest && tqpair->host_hdgst_enable) {
crc32c = nvme_tcp_pdu_calc_header_digest(pdu);
MAKE_DIGEST_WORD((uint8_t *)pdu->hdr.raw + hlen, crc32c);
}
/* Data Digest */
if (pdu->data_len > 0 && enable_digest && tqpair->host_ddgst_enable) {
crc32c = nvme_tcp_pdu_calc_data_digest(pdu);
MAKE_DIGEST_WORD(pdu->data_digest, crc32c);
}
pdu->cb_fn = cb_fn;
pdu->cb_arg = cb_arg;
TAILQ_INSERT_TAIL(&tqpair->send_queue, pdu, tailq);
spdk_nvmf_tcp_qpair_flush_pdus(tqpair);
}
static int
spdk_nvmf_tcp_qpair_init_mem_resource(struct spdk_nvmf_tcp_qpair *tqpair, uint16_t size)
{
int i;
struct spdk_nvmf_tcp_req *tcp_req;
struct spdk_nvmf_transport *transport = tqpair->qpair.transport;
struct spdk_nvmf_tcp_transport *ttransport;
ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
if (!tqpair->qpair.sq_head_max) {
tqpair->req = calloc(1, sizeof(*tqpair->req));
if (!tqpair->req) {
SPDK_ERRLOG("Unable to allocate req on tqpair=%p.\n", tqpair);
return -1;
}
if (transport->opts.in_capsule_data_size) {
tqpair->buf = spdk_dma_zmalloc(ttransport->transport.opts.in_capsule_data_size, 0x1000, NULL);
if (!tqpair->buf) {
SPDK_ERRLOG("Unable to allocate buf on tqpair=%p.\n", tqpair);
return -1;
}
}
tcp_req = tqpair->req;
tcp_req->ttag = 0;
tcp_req->req.qpair = &tqpair->qpair;
/* Set up memory to receive commands */
if (tqpair->buf) {
tcp_req->buf = tqpair->buf;
}
/* Set the cmdn and rsp */
tcp_req->req.rsp = (union nvmf_c2h_msg *)&tcp_req->rsp;
tcp_req->req.cmd = (union nvmf_h2c_msg *)&tcp_req->cmd;
/* Initialize request state to FREE */
tcp_req->state = TCP_REQUEST_STATE_FREE;
TAILQ_INSERT_TAIL(&tqpair->state_queue[tcp_req->state], tcp_req, state_link);
tqpair->pdu = calloc(NVMF_TCP_QPAIR_MAX_C2H_PDU_NUM + 1, sizeof(*tqpair->pdu));
if (!tqpair->pdu) {
SPDK_ERRLOG("Unable to allocate pdu on tqpair=%p.\n", tqpair);
return -1;
}
for (i = 0; i < 1 + NVMF_TCP_QPAIR_MAX_C2H_PDU_NUM; i++) {
TAILQ_INSERT_TAIL(&tqpair->free_queue, &tqpair->pdu[i], tailq);
}
} else {
tqpair->reqs = calloc(size, sizeof(*tqpair->reqs));
if (!tqpair->reqs) {
SPDK_ERRLOG("Unable to allocate reqs on tqpair=%p\n", tqpair);
return -1;
}
if (transport->opts.in_capsule_data_size) {
tqpair->bufs = spdk_dma_zmalloc(size * transport->opts.in_capsule_data_size,
0x1000, NULL);
if (!tqpair->bufs) {
SPDK_ERRLOG("Unable to allocate bufs on tqpair=%p.\n", tqpair);
return -1;
}
}
for (i = 0; i < size; i++) {
struct spdk_nvmf_tcp_req *tcp_req = &tqpair->reqs[i];
tcp_req->ttag = i + 1;
tcp_req->req.qpair = &tqpair->qpair;
/* Set up memory to receive commands */
if (tqpair->bufs) {
tcp_req->buf = (void *)((uintptr_t)tqpair->bufs + (i * transport->opts.in_capsule_data_size));
}
/* Set the cmdn and rsp */
tcp_req->req.rsp = (union nvmf_c2h_msg *)&tcp_req->rsp;
tcp_req->req.cmd = (union nvmf_h2c_msg *)&tcp_req->cmd;
/* Initialize request state to FREE */
tcp_req->state = TCP_REQUEST_STATE_FREE;
TAILQ_INSERT_TAIL(&tqpair->state_queue[tcp_req->state], tcp_req, state_link);
}
tqpair->pdu_pool = calloc(size, sizeof(*tqpair->pdu_pool));
if (!tqpair->pdu_pool) {
SPDK_ERRLOG("Unable to allocate pdu pool on tqpair =%p.\n", tqpair);
return -1;
}
for (i = 0; i < size; i++) {
TAILQ_INSERT_TAIL(&tqpair->free_queue, &tqpair->pdu_pool[i], tailq);
}
}
return 0;
}
static int
spdk_nvmf_tcp_qpair_init(struct spdk_nvmf_qpair *qpair)
{
struct spdk_nvmf_tcp_qpair *tqpair;
int i;
tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "New TCP Connection: %p\n", qpair);
TAILQ_INIT(&tqpair->send_queue);
TAILQ_INIT(&tqpair->free_queue);
TAILQ_INIT(&tqpair->queued_c2h_data_tcp_req);
/* Initialise request state queues of the qpair */
for (i = TCP_REQUEST_STATE_FREE; i < TCP_REQUEST_NUM_STATES; i++) {
TAILQ_INIT(&tqpair->state_queue[i]);
}
tqpair->host_hdgst_enable = true;
tqpair->host_ddgst_enable = true;
return 0;
}
static int
spdk_nvmf_tcp_qpair_sock_init(struct spdk_nvmf_tcp_qpair *tqpair)
{
int rc;
int buf_size;
/* set recv buffer size */
buf_size = 2 * 1024 * 1024;
rc = spdk_sock_set_recvbuf(tqpair->sock, buf_size);
if (rc != 0) {
SPDK_ERRLOG("spdk_sock_set_recvbuf failed\n");
return rc;
}
/* set send buffer size */
rc = spdk_sock_set_sendbuf(tqpair->sock, buf_size);
if (rc != 0) {
SPDK_ERRLOG("spdk_sock_set_sendbuf failed\n");
return rc;
}
/* set low water mark */
rc = spdk_sock_set_recvlowat(tqpair->sock, sizeof(struct spdk_nvme_tcp_c2h_data_hdr));
if (rc != 0) {
SPDK_ERRLOG("spdk_sock_set_recvlowat() failed\n");
return rc;
}
return 0;
}
static void
_spdk_nvmf_tcp_handle_connect(struct spdk_nvmf_transport *transport,
struct spdk_nvmf_tcp_port *port,
struct spdk_sock *sock, new_qpair_fn cb_fn)
{
struct spdk_nvmf_tcp_qpair *tqpair;
int rc;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "New connection accepted on %s port %s\n",
port->trid.traddr, port->trid.trsvcid);
tqpair = calloc(1, sizeof(struct spdk_nvmf_tcp_qpair));
if (tqpair == NULL) {
SPDK_ERRLOG("Could not allocate new connection.\n");
spdk_sock_close(&sock);
return;
}
tqpair->sock = sock;
tqpair->max_queue_depth = 1;
tqpair->free_pdu_num = tqpair->max_queue_depth + NVMF_TCP_QPAIR_MAX_C2H_PDU_NUM;
tqpair->state_cntr[TCP_REQUEST_STATE_FREE] = tqpair->max_queue_depth;
tqpair->port = port;
tqpair->qpair.transport = transport;
rc = spdk_sock_getaddr(tqpair->sock, tqpair->target_addr,
sizeof(tqpair->target_addr), &tqpair->target_port,
tqpair->initiator_addr, sizeof(tqpair->initiator_addr),
&tqpair->initiator_port);
if (rc < 0) {
SPDK_ERRLOG("spdk_sock_getaddr() failed of tqpair=%p\n", tqpair);
spdk_nvmf_tcp_qpair_destroy(tqpair);
return;
}
cb_fn(&tqpair->qpair);
}
static void
spdk_nvmf_tcp_port_accept(struct spdk_nvmf_transport *transport, struct spdk_nvmf_tcp_port *port,
new_qpair_fn cb_fn)
{
struct spdk_sock *sock;
int i;
for (i = 0; i < NVMF_TCP_MAX_ACCEPT_SOCK_ONE_TIME; i++) {
sock = spdk_sock_accept(port->listen_sock);
if (sock) {
_spdk_nvmf_tcp_handle_connect(transport, port, sock, cb_fn);
}
}
}
static void
spdk_nvmf_tcp_accept(struct spdk_nvmf_transport *transport, new_qpair_fn cb_fn)
{
struct spdk_nvmf_tcp_transport *ttransport;
struct spdk_nvmf_tcp_port *port;
ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
TAILQ_FOREACH(port, &ttransport->ports, link) {
spdk_nvmf_tcp_port_accept(transport, port, cb_fn);
}
}
static void
spdk_nvmf_tcp_discover(struct spdk_nvmf_transport *transport,
struct spdk_nvme_transport_id *trid,
struct spdk_nvmf_discovery_log_page_entry *entry)
{
entry->trtype = SPDK_NVMF_TRTYPE_TCP;
entry->adrfam = trid->adrfam;
entry->treq.secure_channel = SPDK_NVMF_TREQ_SECURE_CHANNEL_NOT_SPECIFIED;
spdk_strcpy_pad(entry->trsvcid, trid->trsvcid, sizeof(entry->trsvcid), ' ');
spdk_strcpy_pad(entry->traddr, trid->traddr, sizeof(entry->traddr), ' ');
entry->tsas.tcp.sectype = SPDK_NVME_TCP_SECURITY_NONE;
}
static struct spdk_nvmf_transport_poll_group *
spdk_nvmf_tcp_poll_group_create(struct spdk_nvmf_transport *transport)
{
struct spdk_nvmf_tcp_poll_group *tgroup;
tgroup = calloc(1, sizeof(*tgroup));
if (!tgroup) {
return NULL;
}
tgroup->sock_group = spdk_sock_group_create(NULL);
if (!tgroup->sock_group) {
goto cleanup;
}
TAILQ_INIT(&tgroup->qpairs);
TAILQ_INIT(&tgroup->pending_data_buf_queue);
return &tgroup->group;
cleanup:
free(tgroup);
return NULL;
}
static void
spdk_nvmf_tcp_poll_group_destroy(struct spdk_nvmf_transport_poll_group *group)
{
struct spdk_nvmf_tcp_poll_group *tgroup;
tgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_tcp_poll_group, group);
spdk_sock_group_close(&tgroup->sock_group);
if (!TAILQ_EMPTY(&tgroup->pending_data_buf_queue)) {
SPDK_ERRLOG("Pending I/O list wasn't empty on poll group destruction\n");
}
free(tgroup);
}
static void
spdk_nvmf_tcp_qpair_set_recv_state(struct spdk_nvmf_tcp_qpair *tqpair,
enum nvme_tcp_pdu_recv_state state)
{
if (tqpair->recv_state == state) {
SPDK_ERRLOG("The recv state of tqpair=%p is same with the state(%d) to be set\n",
tqpair, state);
return;
}
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "tqpair(%p) recv state=%d\n", tqpair, state);
tqpair->recv_state = state;
switch (state) {
case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_CH:
case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PSH:
case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD:
break;
case NVME_TCP_PDU_RECV_STATE_ERROR:
case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY:
memset(&tqpair->pdu_in_progress, 0, sizeof(tqpair->pdu_in_progress));
break;
default:
SPDK_ERRLOG("The state(%d) is invalid\n", state);
abort();
break;
}
}
static int
spdk_nvmf_tcp_qpair_handle_timeout(void *ctx)
{
struct spdk_nvmf_tcp_qpair *tqpair = ctx;
assert(tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_ERROR);
SPDK_ERRLOG("No pdu coming for tqpair=%p within %d seconds\n", tqpair,
SPDK_NVME_TCP_QPAIR_EXIT_TIMEOUT);
tqpair->state = NVME_TCP_QPAIR_STATE_EXITED;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "will disconect the tqpair=%p\n", tqpair);
spdk_poller_unregister(&tqpair->timeout_poller);
spdk_nvmf_qpair_disconnect(&tqpair->qpair, NULL, NULL);
return 0;
}
static void
spdk_nvmf_tcp_send_c2h_term_req_complete(void *cb_arg)
{
struct spdk_nvmf_tcp_qpair *tqpair = (struct spdk_nvmf_tcp_qpair *)cb_arg;
if (!tqpair->timeout_poller) {
tqpair->timeout_poller = spdk_poller_register(spdk_nvmf_tcp_qpair_handle_timeout, tqpair,
SPDK_NVME_TCP_QPAIR_EXIT_TIMEOUT * 1000000);
}
}
static void
spdk_nvmf_tcp_send_c2h_term_req(struct spdk_nvmf_tcp_qpair *tqpair, struct nvme_tcp_pdu *pdu,
enum spdk_nvme_tcp_term_req_fes fes, uint32_t error_offset)
{
struct nvme_tcp_pdu *rsp_pdu;
struct spdk_nvme_tcp_term_req_hdr *c2h_term_req;
uint32_t c2h_term_req_hdr_len = sizeof(*c2h_term_req);
uint32_t copy_len;
rsp_pdu = spdk_nvmf_tcp_pdu_get(tqpair);
if (!rsp_pdu) {
tqpair->state = NVME_TCP_QPAIR_STATE_EXITING;
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
return;
}
c2h_term_req = &rsp_pdu->hdr.term_req;
c2h_term_req->common.pdu_type = SPDK_NVME_TCP_PDU_TYPE_C2H_TERM_REQ;
c2h_term_req->common.hlen = c2h_term_req_hdr_len;
if ((fes == SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD) ||
(fes == SPDK_NVME_TCP_TERM_REQ_FES_INVALID_DATA_UNSUPPORTED_PARAMETER)) {
DSET32(&c2h_term_req->fei, error_offset);
}
copy_len = pdu->hdr.common.hlen;
if (copy_len > SPDK_NVME_TCP_TERM_REQ_ERROR_DATA_MAX_SIZE) {
copy_len = SPDK_NVME_TCP_TERM_REQ_ERROR_DATA_MAX_SIZE;
}
/* Copy the error info into the buffer */
memcpy((uint8_t *)rsp_pdu->hdr.raw + c2h_term_req_hdr_len, pdu->hdr.raw, copy_len);
nvme_tcp_pdu_set_data(rsp_pdu, (uint8_t *)rsp_pdu->hdr.raw + c2h_term_req_hdr_len, copy_len);
/* Contain the header of the wrong received pdu */
c2h_term_req->common.plen = c2h_term_req->common.hlen + copy_len;
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
spdk_nvmf_tcp_qpair_write_pdu(tqpair, rsp_pdu, spdk_nvmf_tcp_send_c2h_term_req_complete, tqpair);
}
static void
spdk_nvmf_tcp_capsule_cmd_hdr_handle(struct spdk_nvmf_tcp_transport *ttransport,
struct spdk_nvmf_tcp_qpair *tqpair,
struct nvme_tcp_pdu *pdu)
{
struct spdk_nvmf_tcp_req *tcp_req;
tcp_req = spdk_nvmf_tcp_req_get(tqpair);
if (!tcp_req) {
SPDK_ERRLOG("Cannot allocate tcp_req\n");
tqpair->state = NVME_TCP_QPAIR_STATE_EXITING;
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
return;
}
pdu->ctx = tcp_req;
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_NEW);
spdk_nvmf_tcp_req_process(ttransport, tcp_req);
return;
}
static void
spdk_nvmf_tcp_capsule_cmd_payload_handle(struct spdk_nvmf_tcp_transport *ttransport,
struct spdk_nvmf_tcp_qpair *tqpair,
struct nvme_tcp_pdu *pdu)
{
struct spdk_nvmf_tcp_req *tcp_req;
struct spdk_nvme_tcp_cmd *capsule_cmd;
uint32_t error_offset = 0;
enum spdk_nvme_tcp_term_req_fes fes;
capsule_cmd = &pdu->hdr.capsule_cmd;
tcp_req = pdu->ctx;
assert(tcp_req != NULL);
if (capsule_cmd->common.pdo > SPDK_NVME_TCP_PDU_PDO_MAX_OFFSET) {
SPDK_ERRLOG("Expected ICReq capsule_cmd pdu offset <= %d, got %c\n",
SPDK_NVME_TCP_PDU_PDO_MAX_OFFSET, capsule_cmd->common.pdo);
fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
error_offset = offsetof(struct spdk_nvme_tcp_common_pdu_hdr, pdo);
goto err;
}
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
spdk_nvmf_tcp_req_process(ttransport, tcp_req);
return;
err:
spdk_nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
}
static void
spdk_nvmf_tcp_h2c_data_hdr_handle(struct spdk_nvmf_tcp_transport *ttransport,
struct spdk_nvmf_tcp_qpair *tqpair,
struct nvme_tcp_pdu *pdu)
{
struct spdk_nvmf_tcp_req *tcp_req;
uint32_t error_offset = 0;
enum spdk_nvme_tcp_term_req_fes fes = 0;
struct spdk_nvme_tcp_h2c_data_hdr *h2c_data;
bool ttag_offset_error = false;
h2c_data = &pdu->hdr.h2c_data;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "tqpair=%p, r2t_info: datao=%u, datal=%u, cccid=%u, ttag=%u\n",
tqpair, h2c_data->datao, h2c_data->datal, h2c_data->cccid, h2c_data->ttag);
/* According to the information in the pdu to find the req */
TAILQ_FOREACH(tcp_req, &tqpair->state_queue[TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER],
state_link) {
if ((tcp_req->req.cmd->nvme_cmd.cid == h2c_data->cccid) && (tcp_req->ttag == h2c_data->ttag)) {
break;
}
if (!ttag_offset_error && (tcp_req->req.cmd->nvme_cmd.cid == h2c_data->cccid)) {
ttag_offset_error = true;
}
}
if (!tcp_req) {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "tcp_req is not found for tqpair=%p\n", tqpair);
fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_DATA_UNSUPPORTED_PARAMETER;
if (!ttag_offset_error) {
error_offset = offsetof(struct spdk_nvme_tcp_h2c_data_hdr, cccid);
} else {
error_offset = offsetof(struct spdk_nvme_tcp_h2c_data_hdr, ttag);
}
goto err;
}
if (tcp_req->next_expected_r2t_offset != h2c_data->datao) {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP,
"tcp_req(%p), tqpair=%p, expected_r2t_offset=%u, but data offset =%u\n",
tcp_req, tqpair, tcp_req->next_expected_r2t_offset, h2c_data->datao);
fes = SPDK_NVME_TCP_TERM_REQ_FES_DATA_TRANSFER_OUT_OF_RANGE;
goto err;
}
if (h2c_data->datal > tqpair->maxh2cdata) {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "tcp_req(%p), tqpair=%p, datao=%u execeeds maxh2cdata size=%u\n",
tcp_req, tqpair, h2c_data->datao, tqpair->maxh2cdata);
fes = SPDK_NVME_TCP_TERM_REQ_FES_DATA_TRANSFER_OUT_OF_RANGE;
goto err;
}
if ((h2c_data->datao + h2c_data->datal) > tcp_req->req.length) {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP,
"tcp_req(%p), tqpair=%p, (datao=%u + datal=%u) execeeds requested length=%u\n",
tcp_req, tqpair, h2c_data->datao, h2c_data->datal, tcp_req->req.length);
fes = SPDK_NVME_TCP_TERM_REQ_FES_R2T_LIMIT_EXCEEDED;
goto err;
}
pdu->ctx = tcp_req;
nvme_tcp_pdu_set_data_buf(pdu, tcp_req->req.iov, tcp_req->req.iovcnt,
h2c_data->datao, h2c_data->datal);
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD);
return;
err:
spdk_nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
}
static void
spdk_nvmf_tcp_pdu_cmd_complete(void *cb_arg)
{
struct spdk_nvmf_tcp_req *tcp_req = cb_arg;
nvmf_tcp_request_free(tcp_req);
}
static void
spdk_nvmf_tcp_send_capsule_resp_pdu(struct spdk_nvmf_tcp_req *tcp_req,
struct spdk_nvmf_tcp_qpair *tqpair)
{
struct nvme_tcp_pdu *rsp_pdu;
struct spdk_nvme_tcp_rsp *capsule_resp;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "enter, tqpair=%p\n", tqpair);
rsp_pdu = spdk_nvmf_tcp_pdu_get(tqpair);
if (!rsp_pdu) {
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
tqpair->state = NVME_TCP_QPAIR_STATE_EXITING;
return;
}
capsule_resp = &rsp_pdu->hdr.capsule_resp;
capsule_resp->common.pdu_type = SPDK_NVME_TCP_PDU_TYPE_CAPSULE_RESP;
capsule_resp->common.plen = capsule_resp->common.hlen = sizeof(*capsule_resp);
capsule_resp->rccqe = tcp_req->req.rsp->nvme_cpl;
if (tqpair->host_hdgst_enable) {
capsule_resp->common.flags |= SPDK_NVME_TCP_CH_FLAGS_HDGSTF;
capsule_resp->common.plen += SPDK_NVME_TCP_DIGEST_LEN;
}
spdk_nvmf_tcp_qpair_write_pdu(tqpair, rsp_pdu, spdk_nvmf_tcp_pdu_cmd_complete, tcp_req);
}
static void
spdk_nvmf_tcp_pdu_c2h_data_complete(void *cb_arg)
{
struct spdk_nvmf_tcp_req *tcp_req = cb_arg;
struct spdk_nvmf_tcp_qpair *tqpair = SPDK_CONTAINEROF(tcp_req->req.qpair,
struct spdk_nvmf_tcp_qpair, qpair);
assert(tqpair != NULL);
assert(tcp_req->c2h_data_pdu_num > 0);
tcp_req->c2h_data_pdu_num--;
if (!tcp_req->c2h_data_pdu_num) {
if (tqpair->qpair.transport->opts.c2h_success) {
nvmf_tcp_request_free(tcp_req);
} else {
spdk_nvmf_tcp_send_capsule_resp_pdu(tcp_req, tqpair);
}
}
tqpair->c2h_data_pdu_cnt--;
spdk_nvmf_tcp_handle_pending_c2h_data_queue(tqpair);
}
static void
spdk_nvmf_tcp_send_r2t_pdu(struct spdk_nvmf_tcp_qpair *tqpair,
struct spdk_nvmf_tcp_req *tcp_req)
{
struct nvme_tcp_pdu *rsp_pdu;
struct spdk_nvme_tcp_r2t_hdr *r2t;
rsp_pdu = spdk_nvmf_tcp_pdu_get(tqpair);
if (!rsp_pdu) {
tqpair->state = NVME_TCP_QPAIR_STATE_EXITING;
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
return;
}
r2t = &rsp_pdu->hdr.r2t;
r2t->common.pdu_type = SPDK_NVME_TCP_PDU_TYPE_R2T;
r2t->common.plen = r2t->common.hlen = sizeof(*r2t);
if (tqpair->host_hdgst_enable) {
r2t->common.flags |= SPDK_NVME_TCP_CH_FLAGS_HDGSTF;
r2t->common.plen += SPDK_NVME_TCP_DIGEST_LEN;
}
r2t->cccid = tcp_req->req.cmd->nvme_cmd.cid;
r2t->ttag = tcp_req->ttag;
r2t->r2to = tcp_req->next_expected_r2t_offset;
r2t->r2tl = spdk_min(tcp_req->req.length - tcp_req->next_expected_r2t_offset, tqpair->maxh2cdata);
tcp_req->r2tl_remain = r2t->r2tl;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP,
"tcp_req(%p) on tqpair(%p), r2t_info: cccid=%u, ttag=%u, r2to=%u, r2tl=%u\n",
tcp_req, tqpair, r2t->cccid, r2t->ttag, r2t->r2to, r2t->r2tl);
spdk_nvmf_tcp_qpair_write_pdu(tqpair, rsp_pdu, spdk_nvmf_tcp_pdu_cmd_complete, NULL);
}
static void
spdk_nvmf_tcp_h2c_data_payload_handle(struct spdk_nvmf_tcp_transport *ttransport,
struct spdk_nvmf_tcp_qpair *tqpair,
struct nvme_tcp_pdu *pdu)
{
struct spdk_nvmf_tcp_req *tcp_req;
tcp_req = pdu->ctx;
assert(tcp_req != NULL);
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "enter\n");
tcp_req->next_expected_r2t_offset += pdu->data_len;
tcp_req->r2tl_remain -= pdu->data_len;
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
if (!tcp_req->r2tl_remain) {
if (tcp_req->next_expected_r2t_offset == tcp_req->req.length) {
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
spdk_nvmf_tcp_req_process(ttransport, tcp_req);
} else {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "Send r2t pdu for tcp_req=%p on tqpair=%p\n", tcp_req, tqpair);
spdk_nvmf_tcp_send_r2t_pdu(tqpair, tcp_req);
}
}
}
static void
spdk_nvmf_tcp_h2c_term_req_dump(struct spdk_nvme_tcp_term_req_hdr *h2c_term_req)
{
SPDK_ERRLOG("Error info of pdu(%p): %s\n", h2c_term_req,
spdk_nvmf_tcp_term_req_fes_str[h2c_term_req->fes]);
if ((h2c_term_req->fes == SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD) ||
(h2c_term_req->fes == SPDK_NVME_TCP_TERM_REQ_FES_INVALID_DATA_UNSUPPORTED_PARAMETER)) {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "The offset from the start of the PDU header is %u\n",
DGET32(h2c_term_req->fei));
}
}
static void
spdk_nvmf_tcp_h2c_term_req_hdr_handle(struct spdk_nvmf_tcp_qpair *tqpair,
struct nvme_tcp_pdu *pdu)
{
struct spdk_nvme_tcp_term_req_hdr *h2c_term_req = &pdu->hdr.term_req;
uint32_t error_offset = 0;
enum spdk_nvme_tcp_term_req_fes fes;
if (h2c_term_req->fes > SPDK_NVME_TCP_TERM_REQ_FES_INVALID_DATA_UNSUPPORTED_PARAMETER) {
SPDK_ERRLOG("Fatal Error Stauts(FES) is unknown for h2c_term_req pdu=%p\n", pdu);
fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
error_offset = offsetof(struct spdk_nvme_tcp_term_req_hdr, fes);
goto end;
}
/* set the data buffer */
nvme_tcp_pdu_set_data(pdu, (uint8_t *)pdu->hdr.raw + h2c_term_req->common.hlen,
h2c_term_req->common.plen - h2c_term_req->common.hlen);
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD);
return;
end:
spdk_nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
return;
}
static void
spdk_nvmf_tcp_h2c_term_req_payload_handle(struct spdk_nvmf_tcp_qpair *tqpair,
struct nvme_tcp_pdu *pdu)
{
struct spdk_nvme_tcp_term_req_hdr *h2c_term_req = &pdu->hdr.term_req;
spdk_nvmf_tcp_h2c_term_req_dump(h2c_term_req);
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
return;
}
static void
spdk_nvmf_tcp_pdu_payload_handle(struct spdk_nvmf_tcp_qpair *tqpair)
{
int rc = 0;
struct nvme_tcp_pdu *pdu;
uint32_t crc32c, error_offset = 0;
enum spdk_nvme_tcp_term_req_fes fes;
struct spdk_nvmf_tcp_transport *ttransport;
assert(tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD);
pdu = &tqpair->pdu_in_progress;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "enter\n");
/* check data digest if need */
if (pdu->ddgst_enable) {
crc32c = nvme_tcp_pdu_calc_data_digest(pdu);
rc = MATCH_DIGEST_WORD(pdu->data_digest, crc32c);
if (rc == 0) {
SPDK_ERRLOG("Data digest error on tqpair=(%p) with pdu=%p\n", tqpair, pdu);
fes = SPDK_NVME_TCP_TERM_REQ_FES_HDGST_ERROR;
spdk_nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
return;
}
}
ttransport = SPDK_CONTAINEROF(tqpair->qpair.transport, struct spdk_nvmf_tcp_transport, transport);
switch (pdu->hdr.common.pdu_type) {
case SPDK_NVME_TCP_PDU_TYPE_CAPSULE_CMD:
spdk_nvmf_tcp_capsule_cmd_payload_handle(ttransport, tqpair, pdu);
break;
case SPDK_NVME_TCP_PDU_TYPE_H2C_DATA:
spdk_nvmf_tcp_h2c_data_payload_handle(ttransport, tqpair, pdu);
break;
case SPDK_NVME_TCP_PDU_TYPE_H2C_TERM_REQ:
spdk_nvmf_tcp_h2c_term_req_payload_handle(tqpair, pdu);
break;
default:
/* The code should not go to here */
SPDK_ERRLOG("The code should not go to here\n");
break;
}
}
static void
spdk_nvmf_tcp_send_icresp_complete(void *cb_arg)
{
struct spdk_nvmf_tcp_qpair *tqpair = cb_arg;
tqpair->state = NVME_TCP_QPAIR_STATE_RUNNING;
}
static void
spdk_nvmf_tcp_icreq_handle(struct spdk_nvmf_tcp_transport *ttransport,
struct spdk_nvmf_tcp_qpair *tqpair,
struct nvme_tcp_pdu *pdu)
{
struct spdk_nvme_tcp_ic_req *ic_req = &pdu->hdr.ic_req;
struct nvme_tcp_pdu *rsp_pdu;
struct spdk_nvme_tcp_ic_resp *ic_resp;
uint32_t error_offset = 0;
enum spdk_nvme_tcp_term_req_fes fes;
/* Only PFV 0 is defined currently */
if (ic_req->pfv != 0) {
SPDK_ERRLOG("Expected ICReq PFV %u, got %u\n", 0u, ic_req->pfv);
fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
error_offset = offsetof(struct spdk_nvme_tcp_ic_req, pfv);
goto end;
}
/* MAXR2T is 0's based */
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "maxr2t =%u\n", (ic_req->maxr2t + 1u));
tqpair->host_hdgst_enable = ic_req->dgst.bits.hdgst_enable ? true : false;
tqpair->host_ddgst_enable = ic_req->dgst.bits.ddgst_enable ? true : false;
tqpair->cpda = spdk_min(ic_req->hpda, SPDK_NVME_TCP_CPDA_MAX);
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "cpda of tqpair=(%p) is : %u\n", tqpair, tqpair->cpda);
rsp_pdu = spdk_nvmf_tcp_pdu_get(tqpair);
if (!rsp_pdu) {
tqpair->state = NVME_TCP_QPAIR_STATE_EXITING;
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
return;
}
ic_resp = &rsp_pdu->hdr.ic_resp;
ic_resp->common.pdu_type = SPDK_NVME_TCP_PDU_TYPE_IC_RESP;
ic_resp->common.hlen = ic_resp->common.plen = sizeof(*ic_resp);
ic_resp->pfv = 0;
ic_resp->cpda = tqpair->cpda;
tqpair->maxh2cdata = spdk_min(NVMF_TCP_PDU_MAX_H2C_DATA_SIZE,
ttransport->transport.opts.io_unit_size);
ic_resp->maxh2cdata = tqpair->maxh2cdata;
ic_resp->dgst.bits.hdgst_enable = tqpair->host_hdgst_enable ? 1 : 0;
ic_resp->dgst.bits.ddgst_enable = tqpair->host_ddgst_enable ? 1 : 0;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "host_hdgst_enable: %u\n", tqpair->host_hdgst_enable);
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "host_ddgst_enable: %u\n", tqpair->host_ddgst_enable);
spdk_nvmf_tcp_qpair_write_pdu(tqpair, rsp_pdu, spdk_nvmf_tcp_send_icresp_complete, tqpair);
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
return;
end:
spdk_nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
return;
}
static void
spdk_nvmf_tcp_pdu_psh_handle(struct spdk_nvmf_tcp_qpair *tqpair)
{
struct nvme_tcp_pdu *pdu;
int rc;
uint32_t crc32c, error_offset = 0;
enum spdk_nvme_tcp_term_req_fes fes;
struct spdk_nvmf_tcp_transport *ttransport;
assert(tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PSH);
pdu = &tqpair->pdu_in_progress;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "pdu type of tqpair(%p) is %d\n", tqpair,
pdu->hdr.common.pdu_type);
/* check header digest if needed */
if (pdu->has_hdgst) {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "Compare the header of pdu=%p on tqpair=%p\n", pdu, tqpair);
crc32c = nvme_tcp_pdu_calc_header_digest(pdu);
rc = MATCH_DIGEST_WORD((uint8_t *)pdu->hdr.raw + pdu->hdr.common.hlen, crc32c);
if (rc == 0) {
SPDK_ERRLOG("Header digest error on tqpair=(%p) with pdu=%p\n", tqpair, pdu);
fes = SPDK_NVME_TCP_TERM_REQ_FES_HDGST_ERROR;
spdk_nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
return;
}
}
ttransport = SPDK_CONTAINEROF(tqpair->qpair.transport, struct spdk_nvmf_tcp_transport, transport);
switch (pdu->hdr.common.pdu_type) {
case SPDK_NVME_TCP_PDU_TYPE_IC_REQ:
spdk_nvmf_tcp_icreq_handle(ttransport, tqpair, pdu);
break;
case SPDK_NVME_TCP_PDU_TYPE_CAPSULE_CMD:
spdk_nvmf_tcp_capsule_cmd_hdr_handle(ttransport, tqpair, pdu);
break;
case SPDK_NVME_TCP_PDU_TYPE_H2C_DATA:
spdk_nvmf_tcp_h2c_data_hdr_handle(ttransport, tqpair, pdu);
break;
case SPDK_NVME_TCP_PDU_TYPE_H2C_TERM_REQ:
spdk_nvmf_tcp_h2c_term_req_hdr_handle(tqpair, pdu);
break;
default:
SPDK_ERRLOG("Unexpected PDU type 0x%02x\n", tqpair->pdu_in_progress.hdr.common.pdu_type);
fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
error_offset = 1;
spdk_nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
break;
}
}
static void
spdk_nvmf_tcp_pdu_ch_handle(struct spdk_nvmf_tcp_qpair *tqpair)
{
struct nvme_tcp_pdu *pdu;
uint32_t error_offset = 0;
enum spdk_nvme_tcp_term_req_fes fes;
uint8_t expected_hlen, pdo;
bool plen_error = false, pdo_error = false;
assert(tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_CH);
pdu = &tqpair->pdu_in_progress;
if (pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_IC_REQ) {
if (tqpair->state != NVME_TCP_QPAIR_STATE_INVALID) {
SPDK_ERRLOG("Already received ICreq PDU, and reject this pdu=%p\n", pdu);
fes = SPDK_NVME_TCP_TERM_REQ_FES_PDU_SEQUENCE_ERROR;
goto err;
}
expected_hlen = sizeof(struct spdk_nvme_tcp_ic_req);
if (pdu->hdr.common.plen != expected_hlen) {
plen_error = true;
}
} else {
if (tqpair->state != NVME_TCP_QPAIR_STATE_RUNNING) {
SPDK_ERRLOG("The TCP/IP connection is not negotitated\n");
fes = SPDK_NVME_TCP_TERM_REQ_FES_PDU_SEQUENCE_ERROR;
goto err;
}
switch (pdu->hdr.common.pdu_type) {
case SPDK_NVME_TCP_PDU_TYPE_CAPSULE_CMD:
expected_hlen = sizeof(struct spdk_nvme_tcp_cmd);
pdo = pdu->hdr.common.pdo;
if ((tqpair->cpda != 0) && (pdo != ((tqpair->cpda + 1) << 2))) {
pdo_error = true;
break;
}
if (pdu->hdr.common.plen < expected_hlen) {
plen_error = true;
}
break;
case SPDK_NVME_TCP_PDU_TYPE_H2C_DATA:
expected_hlen = sizeof(struct spdk_nvme_tcp_h2c_data_hdr);
pdo = pdu->hdr.common.pdo;
if ((tqpair->cpda != 0) && (pdo != ((tqpair->cpda + 1) << 2))) {
pdo_error = true;
break;
}
if (pdu->hdr.common.plen < expected_hlen) {
plen_error = true;
}
break;
case SPDK_NVME_TCP_PDU_TYPE_H2C_TERM_REQ:
expected_hlen = sizeof(struct spdk_nvme_tcp_term_req_hdr);
if ((pdu->hdr.common.plen <= expected_hlen) ||
(pdu->hdr.common.plen > SPDK_NVME_TCP_TERM_REQ_PDU_MAX_SIZE)) {
plen_error = true;
}
break;
default:
SPDK_ERRLOG("Unexpected PDU type 0x%02x\n", pdu->hdr.common.pdu_type);
fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
error_offset = offsetof(struct spdk_nvme_tcp_common_pdu_hdr, pdu_type);
goto err;
}
}
if (pdu->hdr.common.hlen != expected_hlen) {
SPDK_ERRLOG("PDU type=0x%02x, Expected ICReq header length %u, got %u on tqpair=%p\n",
pdu->hdr.common.pdu_type,
expected_hlen, pdu->hdr.common.hlen, tqpair);
fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
error_offset = offsetof(struct spdk_nvme_tcp_common_pdu_hdr, hlen);
goto err;
} else if (pdo_error) {
fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
error_offset = offsetof(struct spdk_nvme_tcp_common_pdu_hdr, pdo);
} else if (plen_error) {
fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
error_offset = offsetof(struct spdk_nvme_tcp_common_pdu_hdr, plen);
goto err;
} else {
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PSH);
return;
}
err:
spdk_nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
}
#define MAX_NVME_TCP_PDU_LOOP_COUNT 32
static int
spdk_nvmf_tcp_sock_process(struct spdk_nvmf_tcp_qpair *tqpair)
{
int rc = 0;
struct nvme_tcp_pdu *pdu;
enum nvme_tcp_pdu_recv_state prev_state;
uint32_t data_len, current_pdu_num = 0;
uint8_t psh_len, pdo, hlen;
int8_t padding_len;
/* The loop here is to allow for several back-to-back state changes. */
do {
prev_state = tqpair->recv_state;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "tqpair(%p) recv pdu entering state %d\n", tqpair, prev_state);
switch (tqpair->recv_state) {
/* Wait for the common header */
case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY:
case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_CH:
pdu = &tqpair->pdu_in_progress;
rc = nvme_tcp_read_data(tqpair->sock,
sizeof(struct spdk_nvme_tcp_common_pdu_hdr) - pdu->ch_valid_bytes,
(void *)&pdu->hdr.common + pdu->ch_valid_bytes);
if (rc < 0) {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "will disconnect tqpair=%p\n", tqpair);
return NVME_TCP_PDU_FATAL;
} else if (rc > 0) {
pdu->ch_valid_bytes += rc;
spdk_trace_record(TRACE_TCP_READ_FROM_SOCKET_DONE, 0, rc, 0, 0);
if (spdk_likely(tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY)) {
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_CH);
}
}
if (pdu->ch_valid_bytes < sizeof(struct spdk_nvme_tcp_common_pdu_hdr)) {
return NVME_TCP_PDU_IN_PROGRESS;
}
/* The command header of this PDU has now been read from the socket. */
spdk_nvmf_tcp_pdu_ch_handle(tqpair);
break;
/* Wait for the pdu specific header */
case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PSH:
pdu = &tqpair->pdu_in_progress;
psh_len = hlen = pdu->hdr.common.hlen;
/* Only capsule_cmd and h2c_data has header digest */
if (((pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_CAPSULE_CMD) ||
(pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_H2C_DATA)) &&
tqpair->host_hdgst_enable) {
pdu->has_hdgst = true;
psh_len += SPDK_NVME_TCP_DIGEST_LEN;
if (pdu->hdr.common.plen > psh_len) {
pdo = pdu->hdr.common.pdo;
padding_len = pdo - psh_len;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "padding length is =%d for pdu=%p on tqpair=%p\n", padding_len,
pdu, tqpair);
if (padding_len > 0) {
psh_len = pdo;
}
}
}
psh_len -= sizeof(struct spdk_nvme_tcp_common_pdu_hdr);
/* The following will read psh + hdgest (if possbile) + padding (if posssible) */
if (pdu->psh_valid_bytes < psh_len) {
rc = nvme_tcp_read_data(tqpair->sock,
psh_len - pdu->psh_valid_bytes,
(void *)&pdu->hdr.raw + sizeof(struct spdk_nvme_tcp_common_pdu_hdr) + pdu->psh_valid_bytes);
if (rc < 0) {
return NVME_TCP_PDU_FATAL;
} else if (rc > 0) {
spdk_trace_record(TRACE_TCP_READ_FROM_SOCKET_DONE,
0, rc, 0, 0);
pdu->psh_valid_bytes += rc;
}
if (pdu->psh_valid_bytes < psh_len) {
return NVME_TCP_PDU_IN_PROGRESS;
}
}
/* All header(ch, psh, head digist) of this PDU has now been read from the socket. */
spdk_nvmf_tcp_pdu_psh_handle(tqpair);
if (tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY) {
current_pdu_num++;
}
break;
case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD:
pdu = &tqpair->pdu_in_progress;
/* check whether the data is valid, if not we just return */
if (!pdu->data_len) {
return NVME_TCP_PDU_IN_PROGRESS;
}
data_len = pdu->data_len;
/* data digest */
if (spdk_unlikely((pdu->hdr.common.pdu_type != SPDK_NVME_TCP_PDU_TYPE_H2C_TERM_REQ) &&
tqpair->host_ddgst_enable)) {
data_len += SPDK_NVME_TCP_DIGEST_LEN;
pdu->ddgst_enable = true;
}
rc = nvme_tcp_read_payload_data(tqpair->sock, pdu);
if (rc < 0) {
return NVME_TCP_PDU_IN_PROGRESS;
}
pdu->readv_offset += rc;
if (pdu->readv_offset < data_len) {
return NVME_TCP_PDU_IN_PROGRESS;
}
/* All of this PDU has now been read from the socket. */
spdk_nvmf_tcp_pdu_payload_handle(tqpair);
current_pdu_num++;
break;
case NVME_TCP_PDU_RECV_STATE_ERROR:
pdu = &tqpair->pdu_in_progress;
/* Check whether the connection is closed. Each time, we only read 1 byte every time */
rc = nvme_tcp_read_data(tqpair->sock, 1, (void *)&pdu->hdr.common);
if (rc < 0) {
return NVME_TCP_PDU_FATAL;
}
break;
default:
assert(0);
SPDK_ERRLOG("code should not come to here");
break;
}
} while ((tqpair->recv_state != prev_state) && (current_pdu_num < MAX_NVME_TCP_PDU_LOOP_COUNT));
return rc;
}
static enum spdk_nvme_data_transfer
spdk_nvmf_tcp_req_get_xfer(struct spdk_nvmf_tcp_req *tcp_req) {
enum spdk_nvme_data_transfer xfer;
struct spdk_nvme_cmd *cmd = &tcp_req->req.cmd->nvme_cmd;
struct spdk_nvme_sgl_descriptor *sgl = &cmd->dptr.sgl1;
/* Figure out data transfer direction */
if (cmd->opc == SPDK_NVME_OPC_FABRIC)
{
xfer = spdk_nvme_opc_get_data_transfer(tcp_req->req.cmd->nvmf_cmd.fctype);
} else
{
xfer = spdk_nvme_opc_get_data_transfer(cmd->opc);
/* Some admin commands are special cases */
if ((tcp_req->req.qpair->qid == 0) &&
((cmd->opc == SPDK_NVME_OPC_GET_FEATURES) ||
(cmd->opc == SPDK_NVME_OPC_SET_FEATURES))) {
switch (cmd->cdw10 & 0xff) {
case SPDK_NVME_FEAT_LBA_RANGE_TYPE:
case SPDK_NVME_FEAT_AUTONOMOUS_POWER_STATE_TRANSITION:
case SPDK_NVME_FEAT_HOST_IDENTIFIER:
break;
default:
xfer = SPDK_NVME_DATA_NONE;
}
}
}
if (xfer == SPDK_NVME_DATA_NONE)
{
return xfer;
}
/* Even for commands that may transfer data, they could have specified 0 length.
* We want those to show up with xfer SPDK_NVME_DATA_NONE.
*/
switch (sgl->generic.type)
{
case SPDK_NVME_SGL_TYPE_DATA_BLOCK:
case SPDK_NVME_SGL_TYPE_BIT_BUCKET:
case SPDK_NVME_SGL_TYPE_SEGMENT:
case SPDK_NVME_SGL_TYPE_LAST_SEGMENT:
case SPDK_NVME_SGL_TYPE_TRANSPORT_DATA_BLOCK:
if (sgl->unkeyed.length == 0) {
xfer = SPDK_NVME_DATA_NONE;
}
break;
case SPDK_NVME_SGL_TYPE_KEYED_DATA_BLOCK:
if (sgl->keyed.length == 0) {
xfer = SPDK_NVME_DATA_NONE;
}
break;
}
return xfer;
}
static void
spdk_nvmf_tcp_request_free_buffers(struct spdk_nvmf_tcp_req *tcp_req,
struct spdk_nvmf_transport_poll_group *group, struct spdk_nvmf_transport *transport)
{
for (uint32_t i = 0; i < tcp_req->req.iovcnt; i++) {
assert(tcp_req->buffers[i] != NULL);
if (group->buf_cache_count < group->buf_cache_size) {
STAILQ_INSERT_HEAD(&group->buf_cache,
(struct spdk_nvmf_transport_pg_cache_buf *)tcp_req->buffers[i], link);
group->buf_cache_count++;
} else {
spdk_mempool_put(transport->data_buf_pool, tcp_req->buffers[i]);
}
tcp_req->req.iov[i].iov_base = NULL;
tcp_req->buffers[i] = NULL;
tcp_req->req.iov[i].iov_len = 0;
}
tcp_req->data_from_pool = false;
}
static int
spdk_nvmf_tcp_req_fill_iovs(struct spdk_nvmf_tcp_transport *ttransport,
struct spdk_nvmf_tcp_req *tcp_req)
{
void *buf = NULL;
uint32_t length = tcp_req->req.length;
uint32_t i = 0;
struct spdk_nvmf_tcp_qpair *tqpair;
struct spdk_nvmf_transport_poll_group *group;
tqpair = SPDK_CONTAINEROF(tcp_req->req.qpair, struct spdk_nvmf_tcp_qpair, qpair);
group = &tqpair->group->group;
tcp_req->req.iovcnt = 0;
while (length) {
if (!(STAILQ_EMPTY(&group->buf_cache))) {
group->buf_cache_count--;
buf = STAILQ_FIRST(&group->buf_cache);
STAILQ_REMOVE_HEAD(&group->buf_cache, link);
} else {
buf = spdk_mempool_get(ttransport->transport.data_buf_pool);
if (!buf) {
goto nomem;
}
}
tcp_req->req.iov[i].iov_base = (void *)((uintptr_t)(buf + NVMF_DATA_BUFFER_MASK) &
~NVMF_DATA_BUFFER_MASK);
tcp_req->req.iov[i].iov_len = spdk_min(length, ttransport->transport.opts.io_unit_size);
tcp_req->req.iovcnt++;
tcp_req->buffers[i] = buf;
length -= tcp_req->req.iov[i].iov_len;
i++;
}
assert(tcp_req->req.iovcnt <= SPDK_NVMF_MAX_SGL_ENTRIES);
tcp_req->data_from_pool = true;
return 0;
nomem:
spdk_nvmf_tcp_request_free_buffers(tcp_req, group, &ttransport->transport);
tcp_req->req.iovcnt = 0;
return -ENOMEM;
}
static int
spdk_nvmf_tcp_req_parse_sgl(struct spdk_nvmf_tcp_transport *ttransport,
struct spdk_nvmf_tcp_req *tcp_req)
{
struct spdk_nvme_cmd *cmd;
struct spdk_nvme_cpl *rsp;
struct spdk_nvme_sgl_descriptor *sgl;
cmd = &tcp_req->req.cmd->nvme_cmd;
rsp = &tcp_req->req.rsp->nvme_cpl;
sgl = &cmd->dptr.sgl1;
if (sgl->generic.type == SPDK_NVME_SGL_TYPE_TRANSPORT_DATA_BLOCK &&
sgl->unkeyed.subtype == SPDK_NVME_SGL_SUBTYPE_TRANSPORT) {
if (sgl->unkeyed.length > ttransport->transport.opts.max_io_size) {
SPDK_ERRLOG("SGL length 0x%x exceeds max io size 0x%x\n",
sgl->unkeyed.length, ttransport->transport.opts.max_io_size);
rsp->status.sc = SPDK_NVME_SC_DATA_SGL_LENGTH_INVALID;
return -1;
}
/* fill request length and populate iovs */
tcp_req->req.length = sgl->unkeyed.length;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "Data requested length= 0x%x\n",
sgl->unkeyed.length);
if (spdk_nvmf_tcp_req_fill_iovs(ttransport, tcp_req) < 0) {
/* No available buffers. Queue this request up. */
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "No available large data buffers. Queueing request %p\n", tcp_req);
return 0;
}
/* backward compatible */
tcp_req->req.data = tcp_req->req.iov[0].iov_base;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "Request %p took %d buffer/s from central pool, and data=%p\n",
tcp_req,
tcp_req->req.iovcnt, tcp_req->req.data);
return 0;
} else if (sgl->generic.type == SPDK_NVME_SGL_TYPE_DATA_BLOCK &&
sgl->unkeyed.subtype == SPDK_NVME_SGL_SUBTYPE_OFFSET) {
uint64_t offset = sgl->address;
uint32_t max_len = ttransport->transport.opts.in_capsule_data_size;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "In-capsule data: offset 0x%" PRIx64 ", length 0x%x\n",
offset, sgl->unkeyed.length);
if (offset > max_len) {
SPDK_ERRLOG("In-capsule offset 0x%" PRIx64 " exceeds capsule length 0x%x\n",
offset, max_len);
rsp->status.sc = SPDK_NVME_SC_INVALID_SGL_OFFSET;
return -1;
}
max_len -= (uint32_t)offset;
if (sgl->unkeyed.length > max_len) {
SPDK_ERRLOG("In-capsule data length 0x%x exceeds capsule length 0x%x\n",
sgl->unkeyed.length, max_len);
rsp->status.sc = SPDK_NVME_SC_DATA_SGL_LENGTH_INVALID;
return -1;
}
tcp_req->req.data = tcp_req->buf + offset;
tcp_req->data_from_pool = false;
tcp_req->req.length = sgl->unkeyed.length;
tcp_req->req.iov[0].iov_base = tcp_req->req.data;
tcp_req->req.iov[0].iov_len = tcp_req->req.length;
tcp_req->req.iovcnt = 1;
return 0;
}
SPDK_ERRLOG("Invalid NVMf I/O Command SGL: Type 0x%x, Subtype 0x%x\n",
sgl->generic.type, sgl->generic.subtype);
rsp->status.sc = SPDK_NVME_SC_SGL_DESCRIPTOR_TYPE_INVALID;
return -1;
}
static int
nvmf_tcp_pdu_verify_dif(struct nvme_tcp_pdu *pdu,
const struct spdk_dif_ctx *dif_ctx)
{
struct spdk_dif_error err_blk = {};
int rc;
rc = spdk_dif_verify_stream(pdu->data_iov, pdu->data_iovcnt,
0, pdu->data_len, pdu->dif_ctx, &err_blk);
if (rc != 0) {
SPDK_ERRLOG("DIF error detected. type=%d, offset=%" PRIu32 "\n",
err_blk.err_type, err_blk.err_offset);
}
return rc;
}
static void
spdk_nvmf_tcp_send_c2h_data(struct spdk_nvmf_tcp_qpair *tqpair,
struct spdk_nvmf_tcp_req *tcp_req)
{
struct nvme_tcp_pdu *rsp_pdu;
struct spdk_nvme_tcp_c2h_data_hdr *c2h_data;
uint32_t plen, pdo, alignment;
int rc;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "enter\n");
rsp_pdu = spdk_nvmf_tcp_pdu_get(tqpair);
assert(rsp_pdu != NULL);
c2h_data = &rsp_pdu->hdr.c2h_data;
c2h_data->common.pdu_type = SPDK_NVME_TCP_PDU_TYPE_C2H_DATA;
plen = c2h_data->common.hlen = sizeof(*c2h_data);
if (tqpair->host_hdgst_enable) {
plen += SPDK_NVME_TCP_DIGEST_LEN;
c2h_data->common.flags |= SPDK_NVME_TCP_CH_FLAGS_HDGSTF;
}
/* set the psh */
c2h_data->cccid = tcp_req->req.cmd->nvme_cmd.cid;
c2h_data->datal = spdk_min(NVMF_TCP_PDU_MAX_C2H_DATA_SIZE,
tcp_req->req.length - tcp_req->c2h_data_offset);
c2h_data->datao = tcp_req->c2h_data_offset;
/* set the padding */
rsp_pdu->padding_len = 0;
pdo = plen;
if (tqpair->cpda) {
alignment = (tqpair->cpda + 1) << 2;
if (alignment > plen) {
rsp_pdu->padding_len = alignment - plen;
pdo = plen = alignment;
}
}
c2h_data->common.pdo = pdo;
plen += c2h_data->datal;
if (tqpair->host_ddgst_enable) {
c2h_data->common.flags |= SPDK_NVME_TCP_CH_FLAGS_DDGSTF;
plen += SPDK_NVME_TCP_DIGEST_LEN;
}
c2h_data->common.plen = plen;
nvme_tcp_pdu_set_data_buf(rsp_pdu, tcp_req->req.iov, tcp_req->req.iovcnt,
c2h_data->datao, c2h_data->datal);
if (spdk_unlikely(rsp_pdu->dif_ctx != NULL)) {
rc = nvmf_tcp_pdu_verify_dif(rsp_pdu, rsp_pdu->dif_ctx);
if (rc != 0) {
/* Data digest error detected by the NVMe/TCP target is treated as non-fatal
* transport error because the cause will be outside the NVMe/TCP target.
*
* On the other hand, treat DIF check error as fatal transport error here
* here because the error is caused by the target itself. Fatal NVMe/TCP
* transport error is handled by terminating the connection.
*/
tqpair->state = NVME_TCP_QPAIR_STATE_EXITING;
return;
}
}
tcp_req->c2h_data_offset += c2h_data->datal;
if (tcp_req->c2h_data_offset == tcp_req->req.length) {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "Last pdu for tcp_req=%p on tqpair=%p\n", tcp_req, tqpair);
c2h_data->common.flags |= SPDK_NVME_TCP_C2H_DATA_FLAGS_LAST_PDU;
if (tqpair->qpair.transport->opts.c2h_success) {
c2h_data->common.flags |= SPDK_NVME_TCP_C2H_DATA_FLAGS_SUCCESS;
}
TAILQ_REMOVE(&tqpair->queued_c2h_data_tcp_req, tcp_req, link);
}
tqpair->c2h_data_pdu_cnt += 1;
spdk_nvmf_tcp_qpair_write_pdu(tqpair, rsp_pdu, spdk_nvmf_tcp_pdu_c2h_data_complete, tcp_req);
}
static int
spdk_nvmf_tcp_calc_c2h_data_pdu_num(struct spdk_nvmf_tcp_req *tcp_req)
{
return (tcp_req->req.length + NVMF_TCP_PDU_MAX_C2H_DATA_SIZE - 1) /
NVMF_TCP_PDU_MAX_C2H_DATA_SIZE;
}
static void
spdk_nvmf_tcp_handle_pending_c2h_data_queue(struct spdk_nvmf_tcp_qpair *tqpair)
{
struct spdk_nvmf_tcp_req *tcp_req;
while (!TAILQ_EMPTY(&tqpair->queued_c2h_data_tcp_req) &&
(tqpair->c2h_data_pdu_cnt < NVMF_TCP_QPAIR_MAX_C2H_PDU_NUM)) {
tcp_req = TAILQ_FIRST(&tqpair->queued_c2h_data_tcp_req);
spdk_nvmf_tcp_send_c2h_data(tqpair, tcp_req);
}
}
static void
spdk_nvmf_tcp_queue_c2h_data(struct spdk_nvmf_tcp_req *tcp_req,
struct spdk_nvmf_tcp_qpair *tqpair)
{
tcp_req->c2h_data_pdu_num = spdk_nvmf_tcp_calc_c2h_data_pdu_num(tcp_req);
assert(tcp_req->c2h_data_pdu_num < NVMF_TCP_QPAIR_MAX_C2H_PDU_NUM);
TAILQ_INSERT_TAIL(&tqpair->queued_c2h_data_tcp_req, tcp_req, link);
spdk_nvmf_tcp_handle_pending_c2h_data_queue(tqpair);
}
static int
request_transfer_out(struct spdk_nvmf_request *req)
{
struct spdk_nvmf_tcp_req *tcp_req;
struct spdk_nvmf_qpair *qpair;
struct spdk_nvmf_tcp_qpair *tqpair;
struct spdk_nvme_cpl *rsp;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "enter\n");
qpair = req->qpair;
rsp = &req->rsp->nvme_cpl;
tcp_req = SPDK_CONTAINEROF(req, struct spdk_nvmf_tcp_req, req);
/* Advance our sq_head pointer */
if (qpair->sq_head == qpair->sq_head_max) {
qpair->sq_head = 0;
} else {
qpair->sq_head++;
}
rsp->sqhd = qpair->sq_head;
tqpair = SPDK_CONTAINEROF(tcp_req->req.qpair, struct spdk_nvmf_tcp_qpair, qpair);
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST);
if (rsp->status.sc == SPDK_NVME_SC_SUCCESS &&
req->xfer == SPDK_NVME_DATA_CONTROLLER_TO_HOST) {
spdk_nvmf_tcp_queue_c2h_data(tcp_req, tqpair);
} else {
spdk_nvmf_tcp_send_capsule_resp_pdu(tcp_req, tqpair);
}
return 0;
}
static void
spdk_nvmf_tcp_pdu_set_buf_from_req(struct spdk_nvmf_tcp_qpair *tqpair,
struct spdk_nvmf_tcp_req *tcp_req)
{
struct nvme_tcp_pdu *pdu;
if (tcp_req->data_from_pool) {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "Will send r2t for tcp_req(%p) on tqpair=%p\n", tcp_req, tqpair);
tcp_req->next_expected_r2t_offset = 0;
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER);
spdk_nvmf_tcp_send_r2t_pdu(tqpair, tcp_req);
} else {
pdu = &tqpair->pdu_in_progress;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "Not need to send r2t for tcp_req(%p) on tqpair=%p\n", tcp_req,
tqpair);
/* No need to send r2t, contained in the capsuled data */
nvme_tcp_pdu_set_data_buf(pdu, tcp_req->req.iov, tcp_req->req.iovcnt,
0, tcp_req->req.length);
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD);
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER);
}
}
static void
spdk_nvmf_tcp_set_incapsule_data(struct spdk_nvmf_tcp_qpair *tqpair,
struct spdk_nvmf_tcp_req *tcp_req)
{
struct nvme_tcp_pdu *pdu;
uint32_t plen = 0;
pdu = &tqpair->pdu_in_progress;
plen = pdu->hdr.common.hlen;
if (tqpair->host_hdgst_enable) {
plen += SPDK_NVME_TCP_DIGEST_LEN;
}
if (pdu->hdr.common.plen != plen) {
tcp_req->has_incapsule_data = true;
}
}
static bool
spdk_nvmf_tcp_req_process(struct spdk_nvmf_tcp_transport *ttransport,
struct spdk_nvmf_tcp_req *tcp_req)
{
struct spdk_nvmf_tcp_qpair *tqpair;
struct spdk_nvme_cpl *rsp = &tcp_req->req.rsp->nvme_cpl;
int rc;
enum spdk_nvmf_tcp_req_state prev_state;
bool progress = false;
struct spdk_nvmf_transport_poll_group *group;
tqpair = SPDK_CONTAINEROF(tcp_req->req.qpair, struct spdk_nvmf_tcp_qpair, qpair);
group = &tqpair->group->group;
assert(tcp_req->state != TCP_REQUEST_STATE_FREE);
/* The loop here is to allow for several back-to-back state changes. */
do {
prev_state = tcp_req->state;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "Request %p entering state %d on tqpair=%p\n", tcp_req, prev_state,
tqpair);
switch (tcp_req->state) {
case TCP_REQUEST_STATE_FREE:
/* Some external code must kick a request into TCP_REQUEST_STATE_NEW
* to escape this state. */
break;
case TCP_REQUEST_STATE_NEW:
spdk_trace_record(TRACE_TCP_REQUEST_STATE_NEW, 0, 0, (uintptr_t)tcp_req, 0);
/* copy the cmd from the receive pdu */
tcp_req->cmd = tqpair->pdu_in_progress.hdr.capsule_cmd.ccsqe;
/* The next state transition depends on the data transfer needs of this request. */
tcp_req->req.xfer = spdk_nvmf_tcp_req_get_xfer(tcp_req);
/* If no data to transfer, ready to execute. */
if (tcp_req->req.xfer == SPDK_NVME_DATA_NONE) {
/* Reset the tqpair receving pdu state */
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
break;
}
spdk_nvmf_tcp_set_incapsule_data(tqpair, tcp_req);
if (!tcp_req->has_incapsule_data) {
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
}
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_NEED_BUFFER);
TAILQ_INSERT_TAIL(&tqpair->group->pending_data_buf_queue, tcp_req, link);
break;
case TCP_REQUEST_STATE_NEED_BUFFER:
spdk_trace_record(TRACE_TCP_REQUEST_STATE_NEED_BUFFER, 0, 0, (uintptr_t)tcp_req, 0);
assert(tcp_req->req.xfer != SPDK_NVME_DATA_NONE);
if (!tcp_req->has_incapsule_data &&
(tcp_req != TAILQ_FIRST(&tqpair->group->pending_data_buf_queue))) {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP,
"Not the first element to wait for the buf for tcp_req(%p) on tqpair=%p\n",
tcp_req, tqpair);
/* This request needs to wait in line to obtain a buffer */
break;
}
/* Try to get a data buffer */
rc = spdk_nvmf_tcp_req_parse_sgl(ttransport, tcp_req);
if (rc < 0) {
TAILQ_REMOVE(&tqpair->group->pending_data_buf_queue, tcp_req, link);
rsp->status.sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
/* Reset the tqpair receving pdu state */
spdk_nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_COMPLETE);
break;
}
if (!tcp_req->req.data) {
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "No buffer allocated for tcp_req(%p) on tqpair(%p\n)",
tcp_req, tqpair);
/* No buffers available. */
break;
}
TAILQ_REMOVE(&tqpair->group->pending_data_buf_queue, tcp_req, link);
/* If data is transferring from host to controller, we need to do a transfer from the host. */
if (tcp_req->req.xfer == SPDK_NVME_DATA_HOST_TO_CONTROLLER) {
spdk_nvmf_tcp_pdu_set_buf_from_req(tqpair, tcp_req);
break;
}
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
break;
case TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER:
spdk_trace_record(TRACE_TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER, 0, 0,
(uintptr_t)tcp_req, 0);
/* Some external code must kick a request into TCP_REQUEST_STATE_READY_TO_EXECUTE
* to escape this state. */
break;
case TCP_REQUEST_STATE_READY_TO_EXECUTE:
spdk_trace_record(TRACE_TCP_REQUEST_STATE_READY_TO_EXECUTE, 0, 0, (uintptr_t)tcp_req, 0);
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_EXECUTING);
spdk_nvmf_request_exec(&tcp_req->req);
break;
case TCP_REQUEST_STATE_EXECUTING:
spdk_trace_record(TRACE_TCP_REQUEST_STATE_EXECUTING, 0, 0, (uintptr_t)tcp_req, 0);
/* Some external code must kick a request into TCP_REQUEST_STATE_EXECUTED
* to escape this state. */
break;
case TCP_REQUEST_STATE_EXECUTED:
spdk_trace_record(TRACE_TCP_REQUEST_STATE_EXECUTED, 0, 0, (uintptr_t)tcp_req, 0);
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_COMPLETE);
break;
case TCP_REQUEST_STATE_READY_TO_COMPLETE:
spdk_trace_record(TRACE_TCP_REQUEST_STATE_READY_TO_COMPLETE, 0, 0, (uintptr_t)tcp_req, 0);
rc = request_transfer_out(&tcp_req->req);
assert(rc == 0); /* No good way to handle this currently */
break;
case TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST:
spdk_trace_record(TRACE_TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST, 0, 0,
(uintptr_t)tcp_req,
0);
/* Some external code must kick a request into TCP_REQUEST_STATE_COMPLETED
* to escape this state. */
break;
case TCP_REQUEST_STATE_COMPLETED:
spdk_trace_record(TRACE_TCP_REQUEST_STATE_COMPLETED, 0, 0, (uintptr_t)tcp_req, 0);
if (tcp_req->data_from_pool) {
spdk_nvmf_tcp_request_free_buffers(tcp_req, group, &ttransport->transport);
}
tcp_req->req.length = 0;
tcp_req->req.iovcnt = 0;
tcp_req->req.data = NULL;
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_FREE);
break;
case TCP_REQUEST_NUM_STATES:
default:
assert(0);
break;
}
if (tcp_req->state != prev_state) {
progress = true;
}
} while (tcp_req->state != prev_state);
return progress;
}
static void
spdk_nvmf_tcp_qpair_process_pending(struct spdk_nvmf_tcp_transport *ttransport,
struct spdk_nvmf_tcp_qpair *tqpair)
{
struct spdk_nvmf_tcp_req *tcp_req, *req_tmp;
/* Tqpair is not in a good state, so return it */
if (spdk_unlikely(tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_ERROR)) {
return;
}
TAILQ_FOREACH_SAFE(tcp_req, &tqpair->group->pending_data_buf_queue, link, req_tmp) {
if (spdk_nvmf_tcp_req_process(ttransport, tcp_req) == false) {
break;
}
}
}
static void
spdk_nvmf_tcp_sock_cb(void *arg, struct spdk_sock_group *group, struct spdk_sock *sock)
{
struct spdk_nvmf_tcp_qpair *tqpair = arg;
struct spdk_nvmf_tcp_transport *ttransport;
int rc;
assert(tqpair != NULL);
ttransport = SPDK_CONTAINEROF(tqpair->qpair.transport, struct spdk_nvmf_tcp_transport, transport);
spdk_nvmf_tcp_qpair_process_pending(ttransport, tqpair);
rc = spdk_nvmf_tcp_sock_process(tqpair);
/* check the following two factors:
* rc: The socket is closed
* State of tqpair: The tqpair is in EXITING state due to internal error
*/
if ((rc < 0) || (tqpair->state == NVME_TCP_QPAIR_STATE_EXITING)) {
tqpair->state = NVME_TCP_QPAIR_STATE_EXITED;
spdk_nvmf_tcp_qpair_flush_pdus(tqpair);
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "will disconect the tqpair=%p\n", tqpair);
spdk_poller_unregister(&tqpair->timeout_poller);
spdk_nvmf_qpair_disconnect(&tqpair->qpair, NULL, NULL);
}
}
static int
spdk_nvmf_tcp_poll_group_add(struct spdk_nvmf_transport_poll_group *group,
struct spdk_nvmf_qpair *qpair)
{
struct spdk_nvmf_tcp_poll_group *tgroup;
struct spdk_nvmf_tcp_qpair *tqpair;
int rc;
tgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_tcp_poll_group, group);
tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
rc = spdk_sock_group_add_sock(tgroup->sock_group, tqpair->sock,
spdk_nvmf_tcp_sock_cb, tqpair);
if (rc != 0) {
SPDK_ERRLOG("Could not add sock to sock_group: %s (%d)\n",
spdk_strerror(errno), errno);
spdk_nvmf_tcp_qpair_destroy(tqpair);
return -1;
}
rc = spdk_nvmf_tcp_qpair_sock_init(tqpair);
if (rc != 0) {
SPDK_ERRLOG("Cannot set sock opt for tqpair=%p\n", tqpair);
spdk_nvmf_tcp_qpair_destroy(tqpair);
return -1;
}
rc = spdk_nvmf_tcp_qpair_init(&tqpair->qpair);
if (rc < 0) {
SPDK_ERRLOG("Cannot init tqpair=%p\n", tqpair);
spdk_nvmf_tcp_qpair_destroy(tqpair);
return -1;
}
rc = spdk_nvmf_tcp_qpair_init_mem_resource(tqpair, 1);
if (rc < 0) {
SPDK_ERRLOG("Cannot init memory resource info for tqpair=%p\n", tqpair);
spdk_nvmf_tcp_qpair_destroy(tqpair);
return -1;
}
tqpair->group = tgroup;
tqpair->state = NVME_TCP_QPAIR_STATE_INVALID;
TAILQ_INSERT_TAIL(&tgroup->qpairs, tqpair, link);
return 0;
}
static int
spdk_nvmf_tcp_poll_group_remove(struct spdk_nvmf_transport_poll_group *group,
struct spdk_nvmf_qpair *qpair)
{
struct spdk_nvmf_tcp_poll_group *tgroup;
struct spdk_nvmf_tcp_qpair *tqpair;
int rc;
tgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_tcp_poll_group, group);
tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
assert(tqpair->group == tgroup);
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "remove tqpair=%p from the tgroup=%p\n", tqpair, tgroup);
TAILQ_REMOVE(&tgroup->qpairs, tqpair, link);
rc = spdk_sock_group_remove_sock(tgroup->sock_group, tqpair->sock);
if (rc != 0) {
SPDK_ERRLOG("Could not remove sock from sock_group: %s (%d)\n",
spdk_strerror(errno), errno);
}
return rc;
}
static int
spdk_nvmf_tcp_req_complete(struct spdk_nvmf_request *req)
{
struct spdk_nvmf_tcp_transport *ttransport;
struct spdk_nvmf_tcp_req *tcp_req;
ttransport = SPDK_CONTAINEROF(req->qpair->transport, struct spdk_nvmf_tcp_transport, transport);
tcp_req = SPDK_CONTAINEROF(req, struct spdk_nvmf_tcp_req, req);
spdk_nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_EXECUTED);
spdk_nvmf_tcp_req_process(ttransport, tcp_req);
return 0;
}
static void
spdk_nvmf_tcp_close_qpair(struct spdk_nvmf_qpair *qpair)
{
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "enter\n");
spdk_nvmf_tcp_qpair_destroy(SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair));
}
static int
spdk_nvmf_tcp_poll_group_poll(struct spdk_nvmf_transport_poll_group *group)
{
struct spdk_nvmf_tcp_poll_group *tgroup;
int rc;
tgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_tcp_poll_group, group);
if (spdk_unlikely(TAILQ_EMPTY(&tgroup->qpairs))) {
return 0;
}
rc = spdk_sock_group_poll(tgroup->sock_group);
if (rc < 0) {
SPDK_ERRLOG("Failed to poll sock_group=%p\n", tgroup->sock_group);
return rc;
}
return 0;
}
static int
spdk_nvmf_tcp_qpair_get_trid(struct spdk_nvmf_qpair *qpair,
struct spdk_nvme_transport_id *trid, bool peer)
{
struct spdk_nvmf_tcp_qpair *tqpair;
uint16_t port;
tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
trid->trtype = SPDK_NVME_TRANSPORT_TCP;
if (peer) {
snprintf(trid->traddr, sizeof(trid->traddr), "%s", tqpair->initiator_addr);
port = tqpair->initiator_port;
} else {
snprintf(trid->traddr, sizeof(trid->traddr), "%s", tqpair->target_addr);
port = tqpair->target_port;
}
if (spdk_sock_is_ipv4(tqpair->sock)) {
trid->adrfam = SPDK_NVMF_ADRFAM_IPV4;
} else if (spdk_sock_is_ipv4(tqpair->sock)) {
trid->adrfam = SPDK_NVMF_ADRFAM_IPV6;
} else {
return -1;
}
snprintf(trid->trsvcid, sizeof(trid->trsvcid), "%d", port);
return 0;
}
static int
spdk_nvmf_tcp_qpair_get_local_trid(struct spdk_nvmf_qpair *qpair,
struct spdk_nvme_transport_id *trid)
{
return spdk_nvmf_tcp_qpair_get_trid(qpair, trid, 0);
}
static int
spdk_nvmf_tcp_qpair_get_peer_trid(struct spdk_nvmf_qpair *qpair,
struct spdk_nvme_transport_id *trid)
{
return spdk_nvmf_tcp_qpair_get_trid(qpair, trid, 1);
}
static int
spdk_nvmf_tcp_qpair_get_listen_trid(struct spdk_nvmf_qpair *qpair,
struct spdk_nvme_transport_id *trid)
{
return spdk_nvmf_tcp_qpair_get_trid(qpair, trid, 0);
}
static int
spdk_nvmf_tcp_qpair_set_sq_size(struct spdk_nvmf_qpair *qpair)
{
struct spdk_nvmf_tcp_qpair *tqpair;
int rc;
tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
rc = spdk_nvmf_tcp_qpair_init_mem_resource(tqpair, tqpair->qpair.sq_head_max);
if (!rc) {
tqpair->max_queue_depth += tqpair->qpair.sq_head_max;
tqpair->free_pdu_num += tqpair->qpair.sq_head_max;
tqpair->state_cntr[TCP_REQUEST_STATE_FREE] += tqpair->qpair.sq_head_max;
SPDK_DEBUGLOG(SPDK_LOG_NVMF_TCP, "The queue depth=%u for tqpair=%p\n",
tqpair->max_queue_depth, tqpair);
}
return rc;
}
#define SPDK_NVMF_TCP_DEFAULT_MAX_QUEUE_DEPTH 128
#define SPDK_NVMF_TCP_DEFAULT_AQ_DEPTH 128
#define SPDK_NVMF_TCP_DEFAULT_MAX_QPAIRS_PER_CTRLR 128
#define SPDK_NVMF_TCP_DEFAULT_IN_CAPSULE_DATA_SIZE 4096
#define SPDK_NVMF_TCP_DEFAULT_MAX_IO_SIZE 131072
#define SPDK_NVMF_TCP_DEFAULT_IO_UNIT_SIZE 131072
#define SPDK_NVMF_TCP_DEFAULT_NUM_SHARED_BUFFERS 511
#define SPDK_NVMF_TCP_DEFAULT_BUFFER_CACHE_SIZE 32
#define SPDK_NVMF_TCP_DEFAULT_SUCCESS_OPTIMIZATION true
static void
spdk_nvmf_tcp_opts_init(struct spdk_nvmf_transport_opts *opts)
{
opts->max_queue_depth = SPDK_NVMF_TCP_DEFAULT_MAX_QUEUE_DEPTH;
opts->max_qpairs_per_ctrlr = SPDK_NVMF_TCP_DEFAULT_MAX_QPAIRS_PER_CTRLR;
opts->in_capsule_data_size = SPDK_NVMF_TCP_DEFAULT_IN_CAPSULE_DATA_SIZE;
opts->max_io_size = SPDK_NVMF_TCP_DEFAULT_MAX_IO_SIZE;
opts->io_unit_size = SPDK_NVMF_TCP_DEFAULT_IO_UNIT_SIZE;
opts->max_aq_depth = SPDK_NVMF_TCP_DEFAULT_AQ_DEPTH;
opts->num_shared_buffers = SPDK_NVMF_TCP_DEFAULT_NUM_SHARED_BUFFERS;
opts->buf_cache_size = SPDK_NVMF_TCP_DEFAULT_BUFFER_CACHE_SIZE;
opts->c2h_success = SPDK_NVMF_TCP_DEFAULT_SUCCESS_OPTIMIZATION;
}
const struct spdk_nvmf_transport_ops spdk_nvmf_transport_tcp = {
.type = SPDK_NVME_TRANSPORT_TCP,
.opts_init = spdk_nvmf_tcp_opts_init,
.create = spdk_nvmf_tcp_create,
.destroy = spdk_nvmf_tcp_destroy,
.listen = spdk_nvmf_tcp_listen,
.stop_listen = spdk_nvmf_tcp_stop_listen,
.accept = spdk_nvmf_tcp_accept,
.listener_discover = spdk_nvmf_tcp_discover,
.poll_group_create = spdk_nvmf_tcp_poll_group_create,
.poll_group_destroy = spdk_nvmf_tcp_poll_group_destroy,
.poll_group_add = spdk_nvmf_tcp_poll_group_add,
.poll_group_remove = spdk_nvmf_tcp_poll_group_remove,
.poll_group_poll = spdk_nvmf_tcp_poll_group_poll,
.req_free = spdk_nvmf_tcp_req_free,
.req_complete = spdk_nvmf_tcp_req_complete,
.qpair_fini = spdk_nvmf_tcp_close_qpair,
.qpair_get_local_trid = spdk_nvmf_tcp_qpair_get_local_trid,
.qpair_get_peer_trid = spdk_nvmf_tcp_qpair_get_peer_trid,
.qpair_get_listen_trid = spdk_nvmf_tcp_qpair_get_listen_trid,
.qpair_set_sqsize = spdk_nvmf_tcp_qpair_set_sq_size,
};
SPDK_LOG_REGISTER_COMPONENT("nvmf_tcp", SPDK_LOG_NVMF_TCP)
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