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numam-spdk/lib/nvmf/tcp.c
Ziye Yang 403526021e nvmf/tcp: Fix the typo in print and remove the unnecessary empty line. 
Signed-off-by: Ziye Yang <ziye.yang@intel.com>
Change-Id: Idb39df954e39242353d55e62c4d360da9e5e1c58
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/5283
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Broadcom CI
Community-CI: Mellanox Build Bot
2020-11-26 10:16:36 +00:00

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/*-
* BSD LICENSE
*
* Copyright (c) Intel Corporation. All rights reserved.
* Copyright (c) 2019, 2020 Mellanox Technologies LTD. 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_transport.h"
#include "spdk/string.h"
#include "spdk/trace.h"
#include "spdk/util.h"
#include "spdk/log.h"
#include "spdk_internal/assert.h"
#include "spdk_internal/nvme_tcp.h"
#include "spdk_internal/sock.h"
#include "nvmf_internal.h"
#define NVMF_TCP_MAX_ACCEPT_SOCK_ONE_TIME 16
#define SPDK_NVMF_TCP_DEFAULT_MAX_SOCK_PRIORITY 16
#define SPDK_NVMF_TCP_DEFAULT_SOCK_PRIORITY 0
#define SPDK_NVMF_TCP_DEFAULT_CONTROL_MSG_NUM 32
#define SPDK_NVMF_TCP_DEFAULT_SUCCESS_OPTIMIZATION true
const struct spdk_nvmf_transport_ops spdk_nvmf_transport_tcp;
/* 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 waiting for the R2T send acknowledgement. */
TCP_REQUEST_STATE_AWAITING_R2T_ACK,
/* 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)
#define TRACE_TCP_REQUEST_STATE_AWAIT_R2T_ACK SPDK_TPOINT_ID(TRACE_GROUP_NVMF_TCP, 0xC)
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, "");
spdk_trace_register_description("TCP_REQ_AWAIT_R2T_ACK",
TRACE_TCP_REQUEST_STATE_AWAIT_R2T_ACK,
OWNER_NONE, OBJECT_NVMF_TCP_IO, 0, 1, "");
}
struct spdk_nvmf_tcp_req {
struct spdk_nvmf_request req;
struct spdk_nvme_cpl rsp;
struct spdk_nvme_cmd cmd;
/* A PDU that can be used for sending responses. This is
* not the incoming PDU! */
struct nvme_tcp_pdu *pdu;
/* In-capsule data buffer */
uint8_t *buf;
/*
* The PDU for a request may be used multiple times in serial over
* the request's lifetime. For example, first to send an R2T, then
* to send a completion. To catch mistakes where the PDU is used
* twice at the same time, add a debug flag here for init/fini.
*/
bool pdu_in_use;
bool has_incapsule_data;
/* transfer_tag */
uint16_t ttag;
enum spdk_nvmf_tcp_req_state state;
/*
* h2c_offset is used when we receive the h2c_data PDU.
*/
uint32_t h2c_offset;
STAILQ_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_sock *sock;
enum nvme_tcp_pdu_recv_state recv_state;
enum nvme_tcp_qpair_state state;
/* PDU being actively received */
struct nvme_tcp_pdu pdu_in_progress;
/* 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 */
uint32_t state_cntr[TCP_REQUEST_NUM_STATES];
uint8_t cpda;
bool host_hdgst_enable;
bool host_ddgst_enable;
TAILQ_HEAD(, nvme_tcp_pdu) send_queue;
/* This is a spare PDU used for sending special management
* operations. Primarily, this is used for the initial
* connection response and c2h termination request. */
struct nvme_tcp_pdu *mgmt_pdu;
/* Arrays of in-capsule buffers, requests, and pdus.
* Each array is 'resource_count' number of elements */
void *bufs;
struct spdk_nvmf_tcp_req *reqs;
struct nvme_tcp_pdu *pdus;
uint32_t resource_count;
uint32_t recv_buf_size;
struct spdk_nvmf_tcp_port *port;
/* 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_control_msg {
STAILQ_ENTRY(spdk_nvmf_tcp_control_msg) link;
};
struct spdk_nvmf_tcp_control_msg_list {
void *msg_buf;
STAILQ_HEAD(, spdk_nvmf_tcp_control_msg) free_msgs;
};
struct spdk_nvmf_tcp_poll_group {
struct spdk_nvmf_transport_poll_group group;
struct spdk_sock_group *sock_group;
TAILQ_HEAD(, spdk_nvmf_tcp_qpair) qpairs;
struct spdk_nvmf_tcp_control_msg_list *control_msg_list;
};
struct spdk_nvmf_tcp_port {
const struct spdk_nvme_transport_id *trid;
struct spdk_sock *listen_sock;
TAILQ_ENTRY(spdk_nvmf_tcp_port) link;
};
struct tcp_transport_opts {
bool c2h_success;
uint16_t control_msg_num;
uint32_t sock_priority;
};
struct spdk_nvmf_tcp_transport {
struct spdk_nvmf_transport transport;
struct tcp_transport_opts tcp_opts;
pthread_mutex_t lock;
TAILQ_HEAD(, spdk_nvmf_tcp_port) ports;
};
static const struct spdk_json_object_decoder tcp_transport_opts_decoder[] = {
{
"c2h_success", offsetof(struct tcp_transport_opts, c2h_success),
spdk_json_decode_bool, true
},
{
"control_msg_num", offsetof(struct tcp_transport_opts, control_msg_num),
spdk_json_decode_uint16, true
},
{
"sock_priority", offsetof(struct tcp_transport_opts, sock_priority),
spdk_json_decode_uint32, true
},
};
static bool nvmf_tcp_req_process(struct spdk_nvmf_tcp_transport *ttransport,
struct spdk_nvmf_tcp_req *tcp_req);
static void nvmf_tcp_poll_group_destroy(struct spdk_nvmf_transport_poll_group *group);
static void
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);
assert(tqpair->state_cntr[tcp_req->state] > 0);
tqpair->state_cntr[tcp_req->state]--;
TAILQ_INSERT_TAIL(&tqpair->state_queue[state], tcp_req, state_link);
tqpair->state_cntr[state]++;
tcp_req->state = state;
}
static inline struct nvme_tcp_pdu *
nvmf_tcp_req_pdu_init(struct spdk_nvmf_tcp_req *tcp_req)
{
assert(tcp_req->pdu_in_use == false);
tcp_req->pdu_in_use = true;
memset(tcp_req->pdu, 0, sizeof(*tcp_req->pdu));
tcp_req->pdu->qpair = SPDK_CONTAINEROF(tcp_req->req.qpair, struct spdk_nvmf_tcp_qpair, qpair);
return tcp_req->pdu;
}
static inline void
nvmf_tcp_req_pdu_fini(struct spdk_nvmf_tcp_req *tcp_req)
{
tcp_req->pdu_in_use = false;
}
static struct spdk_nvmf_tcp_req *
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) {
return NULL;
}
memset(&tcp_req->rsp, 0, sizeof(tcp_req->rsp));
tcp_req->h2c_offset = 0;
tcp_req->has_incapsule_data = false;
tcp_req->req.dif.dif_insert_or_strip = false;
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;
assert(tcp_req != NULL);
SPDK_DEBUGLOG(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);
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_COMPLETED);
nvmf_tcp_req_process(ttransport, tcp_req);
}
static int
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
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
nvmf_tcp_cleanup_all_states(struct spdk_nvmf_tcp_qpair *tqpair)
{
struct spdk_nvmf_tcp_req *tcp_req, *req_tmp;
assert(TAILQ_EMPTY(&tqpair->send_queue));
nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST);
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) {
STAILQ_REMOVE(&tqpair->group->group.pending_buf_queue, &tcp_req->req,
spdk_nvmf_request, buf_link);
}
nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_NEED_BUFFER);
nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_EXECUTING);
nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER);
nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_AWAITING_R2T_ACK);
}
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] = %u\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->req.data_from_pool);
SPDK_ERRLOG("\t\tRequest opcode: %d\n", tcp_req->req.cmd->nvmf_cmd.opcode);
}
}
}
static void
nvmf_tcp_qpair_destroy(struct spdk_nvmf_tcp_qpair *tqpair)
{
int err = 0;
SPDK_DEBUGLOG(nvmf_tcp, "enter\n");
err = spdk_sock_close(&tqpair->sock);
assert(err == 0);
nvmf_tcp_cleanup_all_states(tqpair);
if (tqpair->state_cntr[TCP_REQUEST_STATE_FREE] != tqpair->resource_count) {
SPDK_ERRLOG("tqpair(%p) free tcp request num is %u but should be %u\n", tqpair,
tqpair->state_cntr[TCP_REQUEST_STATE_FREE],
tqpair->resource_count);
err++;
}
if (err > 0) {
nvmf_tcp_dump_qpair_req_contents(tqpair);
}
spdk_dma_free(tqpair->pdus);
free(tqpair->reqs);
spdk_free(tqpair->bufs);
free(tqpair);
SPDK_DEBUGLOG(nvmf_tcp, "Leave\n");
}
static void
nvmf_tcp_dump_opts(struct spdk_nvmf_transport *transport, struct spdk_json_write_ctx *w)
{
struct spdk_nvmf_tcp_transport *ttransport;
assert(w != NULL);
ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
spdk_json_write_named_bool(w, "c2h_success", ttransport->tcp_opts.c2h_success);
spdk_json_write_named_uint32(w, "sock_priority", ttransport->tcp_opts.sock_priority);
}
static int
nvmf_tcp_destroy(struct spdk_nvmf_transport *transport,
spdk_nvmf_transport_destroy_done_cb cb_fn, void *cb_arg)
{
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);
if (cb_fn) {
cb_fn(cb_arg);
}
return 0;
}
static struct spdk_nvmf_transport *
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;
ttransport->tcp_opts.c2h_success = SPDK_NVMF_TCP_DEFAULT_SUCCESS_OPTIMIZATION;
ttransport->tcp_opts.sock_priority = SPDK_NVMF_TCP_DEFAULT_SOCK_PRIORITY;
ttransport->tcp_opts.control_msg_num = SPDK_NVMF_TCP_DEFAULT_CONTROL_MSG_NUM;
if (opts->transport_specific != NULL &&
spdk_json_decode_object_relaxed(opts->transport_specific, tcp_transport_opts_decoder,
SPDK_COUNTOF(tcp_transport_opts_decoder),
&ttransport->tcp_opts)) {
SPDK_ERRLOG("spdk_json_decode_object_relaxed failed\n");
free(ttransport);
return NULL;
}
SPDK_NOTICELOG("*** TCP Transport Init ***\n");
SPDK_INFOLOG(nvmf_tcp, "*** TCP Transport Init ***\n"
" Transport opts: max_ioq_depth=%d, max_io_size=%d,\n"
" max_io_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"
" dif_insert_or_strip=%d, sock_priority=%d\n"
" abort_timeout_sec=%d, control_msg_num=%hu\n",
opts->max_queue_depth,
opts->max_io_size,
opts->max_qpairs_per_ctrlr - 1,
opts->io_unit_size,
opts->in_capsule_data_size,
opts->max_aq_depth,
opts->num_shared_buffers,
ttransport->tcp_opts.c2h_success,
opts->dif_insert_or_strip,
ttransport->tcp_opts.sock_priority,
opts->abort_timeout_sec,
ttransport->tcp_opts.control_msg_num);
if (ttransport->tcp_opts.sock_priority > SPDK_NVMF_TCP_DEFAULT_MAX_SOCK_PRIORITY) {
SPDK_ERRLOG("Unsupported socket_priority=%d, the current range is: 0 to %d\n"
"you can use man 7 socket to view the range of priority under SO_PRIORITY item\n",
ttransport->tcp_opts.sock_priority, SPDK_NVMF_TCP_DEFAULT_MAX_SOCK_PRIORITY);
free(ttransport);
return NULL;
}
if (ttransport->tcp_opts.control_msg_num == 0 &&
opts->in_capsule_data_size < SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE) {
SPDK_WARNLOG("TCP param control_msg_num can't be 0 if ICD is less than %u bytes. Using default value %u\n",
SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE, SPDK_NVMF_TCP_DEFAULT_CONTROL_MSG_NUM);
ttransport->tcp_opts.control_msg_num = SPDK_NVMF_TCP_DEFAULT_CONTROL_MSG_NUM;
}
/* 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_env_get_core_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");
nvmf_tcp_destroy(&ttransport->transport, NULL, NULL);
return NULL;
}
pthread_mutex_init(&ttransport->lock, NULL);
return &ttransport->transport;
}
static int
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
nvmf_tcp_canon_listen_trid(struct spdk_nvme_transport_id *canon_trid,
const struct spdk_nvme_transport_id *trid)
{
int trsvcid_int;
trsvcid_int = nvmf_tcp_trsvcid_to_int(trid->trsvcid);
if (trsvcid_int < 0) {
return -EINVAL;
}
memset(canon_trid, 0, sizeof(*canon_trid));
spdk_nvme_trid_populate_transport(canon_trid, 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 *
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 (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
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;
struct spdk_sock_opts opts;
ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
trsvcid_int = 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 = calloc(1, sizeof(*port));
if (!port) {
SPDK_ERRLOG("Port allocation failed\n");
pthread_mutex_unlock(&ttransport->lock);
return -ENOMEM;
}
port->trid = trid;
opts.opts_size = sizeof(opts);
spdk_sock_get_default_opts(&opts);
opts.priority = ttransport->tcp_opts.sock_priority;
port->listen_sock = spdk_sock_listen_ext(trid->traddr, trsvcid_int,
NULL, &opts);
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 %s ***\n",
trid->traddr, trid->trsvcid);
TAILQ_INSERT_TAIL(&ttransport->ports, port, link);
pthread_mutex_unlock(&ttransport->lock);
return 0;
}
static void
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;
ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
SPDK_DEBUGLOG(nvmf_tcp, "Removing listen address %s port %s\n",
trid->traddr, trid->trsvcid);
pthread_mutex_lock(&ttransport->lock);
port = nvmf_tcp_find_port(ttransport, trid);
if (port) {
TAILQ_REMOVE(&ttransport->ports, port, link);
spdk_sock_close(&port->listen_sock);
free(port);
}
pthread_mutex_unlock(&ttransport->lock);
}
static void nvmf_tcp_qpair_set_recv_state(struct spdk_nvmf_tcp_qpair *tqpair,
enum nvme_tcp_pdu_recv_state state);
static void
nvmf_tcp_qpair_disconnect(struct spdk_nvmf_tcp_qpair *tqpair)
{
SPDK_DEBUGLOG(nvmf_tcp, "Disconnecting qpair %p\n", tqpair);
if (tqpair->state <= NVME_TCP_QPAIR_STATE_RUNNING) {
tqpair->state = NVME_TCP_QPAIR_STATE_EXITING;
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
spdk_poller_unregister(&tqpair->timeout_poller);
/* This will end up calling nvmf_tcp_close_qpair */
spdk_nvmf_qpair_disconnect(&tqpair->qpair, NULL, NULL);
}
}
static void
_pdu_write_done(void *_pdu, int err)
{
struct nvme_tcp_pdu *pdu = _pdu;
struct spdk_nvmf_tcp_qpair *tqpair = pdu->qpair;
TAILQ_REMOVE(&tqpair->send_queue, pdu, tailq);
if (err != 0) {
nvmf_tcp_qpair_disconnect(tqpair);
return;
}
assert(pdu->cb_fn != NULL);
pdu->cb_fn(pdu->cb_arg);
}
static void
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 hlen;
uint32_t crc32c;
uint32_t mapped_length = 0;
ssize_t rc;
assert(&tqpair->pdu_in_progress != pdu);
hlen = pdu->hdr.common.hlen;
/* Header Digest */
if (g_nvme_tcp_hdgst[pdu->hdr.common.pdu_type] && 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 && g_nvme_tcp_ddgst[pdu->hdr.common.pdu_type] && 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;
pdu->sock_req.iovcnt = nvme_tcp_build_iovs(pdu->iov, SPDK_COUNTOF(pdu->iov), pdu,
tqpair->host_hdgst_enable, tqpair->host_ddgst_enable,
&mapped_length);
pdu->sock_req.cb_fn = _pdu_write_done;
pdu->sock_req.cb_arg = pdu;
TAILQ_INSERT_TAIL(&tqpair->send_queue, pdu, tailq);
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) {
rc = spdk_sock_writev(tqpair->sock, pdu->iov, pdu->sock_req.iovcnt);
if (rc == mapped_length) {
_pdu_write_done(pdu, 0);
} else {
SPDK_ERRLOG("IC_RESP or TERM_REQ could not write to socket.\n");
_pdu_write_done(pdu, -1);
}
} else {
spdk_sock_writev_async(tqpair->sock, &pdu->sock_req);
}
}
static int
nvmf_tcp_qpair_init_mem_resource(struct spdk_nvmf_tcp_qpair *tqpair)
{
uint32_t i;
struct spdk_nvmf_transport_opts *opts;
uint32_t in_capsule_data_size;
opts = &tqpair->qpair.transport->opts;
in_capsule_data_size = opts->in_capsule_data_size;
if (opts->dif_insert_or_strip) {
in_capsule_data_size = SPDK_BDEV_BUF_SIZE_WITH_MD(in_capsule_data_size);
}
tqpair->resource_count = opts->max_queue_depth;
tqpair->reqs = calloc(tqpair->resource_count, sizeof(*tqpair->reqs));
if (!tqpair->reqs) {
SPDK_ERRLOG("Unable to allocate reqs on tqpair=%p\n", tqpair);
return -1;
}
if (in_capsule_data_size) {
tqpair->bufs = spdk_zmalloc(tqpair->resource_count * in_capsule_data_size, 0x1000,
NULL, SPDK_ENV_LCORE_ID_ANY,
SPDK_MALLOC_DMA);
if (!tqpair->bufs) {
SPDK_ERRLOG("Unable to allocate bufs on tqpair=%p.\n", tqpair);
return -1;
}
}
/* Add addtional one member, which will be used for mgmt_pdu owned by the tqpair */
tqpair->pdus = spdk_dma_malloc((tqpair->resource_count + 1) * sizeof(*tqpair->pdus), 0x1000, NULL);
if (!tqpair->pdus) {
SPDK_ERRLOG("Unable to allocate pdu pool on tqpair =%p.\n", tqpair);
return -1;
}
for (i = 0; i < tqpair->resource_count; i++) {
struct spdk_nvmf_tcp_req *tcp_req = &tqpair->reqs[i];
tcp_req->ttag = i + 1;
tcp_req->req.qpair = &tqpair->qpair;
tcp_req->pdu = &tqpair->pdus[i];
tcp_req->pdu->qpair = tqpair;
/* Set up memory to receive commands */
if (tqpair->bufs) {
tcp_req->buf = (void *)((uintptr_t)tqpair->bufs + (i * 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->state_cntr[TCP_REQUEST_STATE_FREE]++;
}
tqpair->mgmt_pdu = &tqpair->pdus[i];
tqpair->mgmt_pdu->qpair = tqpair;
tqpair->recv_buf_size = (in_capsule_data_size + sizeof(struct spdk_nvme_tcp_cmd) + 2 *
SPDK_NVME_TCP_DIGEST_LEN) * SPDK_NVMF_TCP_RECV_BUF_SIZE_FACTOR;
return 0;
}
static int
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(nvmf_tcp, "New TCP Connection: %p\n", qpair);
TAILQ_INIT(&tqpair->send_queue);
/* 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
nvmf_tcp_qpair_sock_init(struct spdk_nvmf_tcp_qpair *tqpair)
{
int rc;
/* set low water mark */
rc = spdk_sock_set_recvlowat(tqpair->sock, sizeof(struct spdk_nvme_tcp_common_pdu_hdr));
if (rc != 0) {
SPDK_ERRLOG("spdk_sock_set_recvlowat() failed\n");
return rc;
}
return 0;
}
static void
nvmf_tcp_handle_connect(struct spdk_nvmf_transport *transport,
struct spdk_nvmf_tcp_port *port,
struct spdk_sock *sock)
{
struct spdk_nvmf_tcp_qpair *tqpair;
int rc;
SPDK_DEBUGLOG(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->state_cntr[TCP_REQUEST_STATE_FREE] = 0;
tqpair->port = port;
tqpair->qpair.transport = transport;
tqpair->qpair.trid = port->trid;
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);
nvmf_tcp_qpair_destroy(tqpair);
return;
}
spdk_nvmf_tgt_new_qpair(transport->tgt, &tqpair->qpair);
}
static uint32_t
nvmf_tcp_port_accept(struct spdk_nvmf_transport *transport, struct spdk_nvmf_tcp_port *port)
{
struct spdk_sock *sock;
uint32_t count = 0;
int i;
for (i = 0; i < NVMF_TCP_MAX_ACCEPT_SOCK_ONE_TIME; i++) {
sock = spdk_sock_accept(port->listen_sock);
if (sock == NULL) {
break;
}
count++;
nvmf_tcp_handle_connect(transport, port, sock);
}
return count;
}
static uint32_t
nvmf_tcp_accept(struct spdk_nvmf_transport *transport)
{
struct spdk_nvmf_tcp_transport *ttransport;
struct spdk_nvmf_tcp_port *port;
uint32_t count = 0;
ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
TAILQ_FOREACH(port, &ttransport->ports, link) {
count += nvmf_tcp_port_accept(transport, port);
}
return count;
}
static void
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_REQUIRED;
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_tcp_control_msg_list *
nvmf_tcp_control_msg_list_create(uint16_t num_messages)
{
struct spdk_nvmf_tcp_control_msg_list *list;
struct spdk_nvmf_tcp_control_msg *msg;
uint16_t i;
list = calloc(1, sizeof(*list));
if (!list) {
SPDK_ERRLOG("Failed to allocate memory for list structure\n");
return NULL;
}
list->msg_buf = spdk_zmalloc(num_messages * SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE,
NVMF_DATA_BUFFER_ALIGNMENT, NULL, SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
if (!list->msg_buf) {
SPDK_ERRLOG("Failed to allocate memory for control message buffers\n");
free(list);
return NULL;
}
STAILQ_INIT(&list->free_msgs);
for (i = 0; i < num_messages; i++) {
msg = (struct spdk_nvmf_tcp_control_msg *)((char *)list->msg_buf + i *
SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE);
STAILQ_INSERT_TAIL(&list->free_msgs, msg, link);
}
return list;
}
static void
nvmf_tcp_control_msg_list_free(struct spdk_nvmf_tcp_control_msg_list *list)
{
if (!list) {
return;
}
spdk_free(list->msg_buf);
free(list);
}
static struct spdk_nvmf_transport_poll_group *
nvmf_tcp_poll_group_create(struct spdk_nvmf_transport *transport)
{
struct spdk_nvmf_tcp_transport *ttransport;
struct spdk_nvmf_tcp_poll_group *tgroup;
tgroup = calloc(1, sizeof(*tgroup));
if (!tgroup) {
return NULL;
}
tgroup->sock_group = spdk_sock_group_create(&tgroup->group);
if (!tgroup->sock_group) {
goto cleanup;
}
TAILQ_INIT(&tgroup->qpairs);
ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
if (transport->opts.in_capsule_data_size < SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE) {
SPDK_DEBUGLOG(nvmf_tcp, "ICD %u is less than min required for admin/fabric commands (%u). "
"Creating control messages list\n", transport->opts.in_capsule_data_size,
SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE);
tgroup->control_msg_list = nvmf_tcp_control_msg_list_create(ttransport->tcp_opts.control_msg_num);
if (!tgroup->control_msg_list) {
goto cleanup;
}
}
return &tgroup->group;
cleanup:
nvmf_tcp_poll_group_destroy(&tgroup->group);
return NULL;
}
static struct spdk_nvmf_transport_poll_group *
nvmf_tcp_get_optimal_poll_group(struct spdk_nvmf_qpair *qpair)
{
struct spdk_nvmf_tcp_qpair *tqpair;
struct spdk_sock_group *group = NULL;
int rc;
tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
rc = spdk_sock_get_optimal_sock_group(tqpair->sock, &group);
if (!rc && group != NULL) {
return spdk_sock_group_get_ctx(group);
}
return NULL;
}
static void
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 (tgroup->control_msg_list) {
nvmf_tcp_control_msg_list_free(tgroup->control_msg_list);
}
free(tgroup);
}
static void
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(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:
case NVME_TCP_PDU_RECV_STATE_AWAIT_REQ:
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
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);
nvmf_tcp_qpair_disconnect(tqpair);
return SPDK_POLLER_BUSY;
}
static void
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(nvmf_tcp_qpair_handle_timeout, tqpair,
SPDK_NVME_TCP_QPAIR_EXIT_TIMEOUT * 1000000);
}
}
static void
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 = tqpair->mgmt_pdu;
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 = spdk_min(pdu->hdr.common.hlen, 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;
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
nvmf_tcp_qpair_write_pdu(tqpair, rsp_pdu, nvmf_tcp_send_c2h_term_req_complete, tqpair);
}
static void
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;
assert(pdu->psh_valid_bytes == pdu->psh_len);
assert(pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_CAPSULE_CMD);
tcp_req = nvmf_tcp_req_get(tqpair);
if (!tcp_req) {
/* Directly return and make the allocation retry again */
if (tqpair->state_cntr[TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST] > 0) {
return;
}
/* The host sent more commands than the maximum queue depth. */
SPDK_ERRLOG("Cannot allocate tcp_req on tqpair=%p\n", tqpair);
nvmf_tcp_qpair_disconnect(tqpair);
return;
}
pdu->req = tcp_req;
assert(tcp_req->state == TCP_REQUEST_STATE_NEW);
nvmf_tcp_req_process(ttransport, tcp_req);
}
static void
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->req;
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;
}
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
nvmf_tcp_req_process(ttransport, tcp_req);
return;
err:
nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
}
static int
nvmf_tcp_find_req_in_state(struct spdk_nvmf_tcp_qpair *tqpair,
enum spdk_nvmf_tcp_req_state state,
uint16_t cid, uint16_t tag,
struct spdk_nvmf_tcp_req **req)
{
struct spdk_nvmf_tcp_req *tcp_req = NULL;
TAILQ_FOREACH(tcp_req, &tqpair->state_queue[state], state_link) {
if (tcp_req->req.cmd->nvme_cmd.cid != cid) {
continue;
}
if (tcp_req->ttag == tag) {
*req = tcp_req;
return 0;
}
*req = NULL;
return -1;
}
/* Didn't find it, but not an error */
*req = NULL;
return 0;
}
static void
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;
int rc;
h2c_data = &pdu->hdr.h2c_data;
SPDK_DEBUGLOG(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);
rc = nvmf_tcp_find_req_in_state(tqpair, TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER,
h2c_data->cccid, h2c_data->ttag, &tcp_req);
if (rc == 0 && tcp_req == NULL) {
rc = nvmf_tcp_find_req_in_state(tqpair, TCP_REQUEST_STATE_AWAITING_R2T_ACK, h2c_data->cccid,
h2c_data->ttag, &tcp_req);
}
if (!tcp_req) {
SPDK_DEBUGLOG(nvmf_tcp, "tcp_req is not found for tqpair=%p\n", tqpair);
fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_DATA_UNSUPPORTED_PARAMETER;
if (rc == 0) {
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->h2c_offset != h2c_data->datao) {
SPDK_DEBUGLOG(nvmf_tcp,
"tcp_req(%p), tqpair=%p, expected data offset %u, but data offset is %u\n",
tcp_req, tqpair, tcp_req->h2c_offset, h2c_data->datao);
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(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_DATA_TRANSFER_OUT_OF_RANGE;
goto err;
}
pdu->req = tcp_req;
if (spdk_unlikely(tcp_req->req.dif.dif_insert_or_strip)) {
pdu->dif_ctx = &tcp_req->req.dif.dif_ctx;
}
nvme_tcp_pdu_set_data_buf(pdu, tcp_req->req.iov, tcp_req->req.iovcnt,
h2c_data->datao, h2c_data->datal);
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD);
return;
err:
nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
}
static void
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
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(nvmf_tcp, "enter, tqpair=%p\n", tqpair);
rsp_pdu = nvmf_tcp_req_pdu_init(tcp_req);
assert(rsp_pdu != NULL);
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;
}
nvmf_tcp_qpair_write_pdu(tqpair, rsp_pdu, nvmf_tcp_pdu_cmd_complete, tcp_req);
}
static void
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);
struct spdk_nvmf_tcp_transport *ttransport = SPDK_CONTAINEROF(
tcp_req->req.qpair->transport, struct spdk_nvmf_tcp_transport, transport);
assert(tqpair != NULL);
if (ttransport->tcp_opts.c2h_success) {
nvmf_tcp_request_free(tcp_req);
} else {
nvmf_tcp_req_pdu_fini(tcp_req);
nvmf_tcp_send_capsule_resp_pdu(tcp_req, tqpair);
}
}
static void
nvmf_tcp_r2t_complete(void *cb_arg)
{
struct spdk_nvmf_tcp_req *tcp_req = cb_arg;
struct spdk_nvmf_tcp_transport *ttransport;
nvmf_tcp_req_pdu_fini(tcp_req);
ttransport = SPDK_CONTAINEROF(tcp_req->req.qpair->transport,
struct spdk_nvmf_tcp_transport, transport);
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER);
if (tcp_req->h2c_offset == tcp_req->req.length) {
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
nvmf_tcp_req_process(ttransport, tcp_req);
}
}
static void
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 = nvmf_tcp_req_pdu_init(tcp_req);
assert(rsp_pdu != NULL);
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->h2c_offset;
r2t->r2tl = tcp_req->req.length;
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_AWAITING_R2T_ACK);
SPDK_DEBUGLOG(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);
nvmf_tcp_qpair_write_pdu(tqpair, rsp_pdu, nvmf_tcp_r2t_complete, tcp_req);
}
static void
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->req;
assert(tcp_req != NULL);
SPDK_DEBUGLOG(nvmf_tcp, "enter\n");
tcp_req->h2c_offset += pdu->data_len;
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
/* Wait for all of the data to arrive AND for the initial R2T PDU send to be
* acknowledged before moving on. */
if (tcp_req->h2c_offset == tcp_req->req.length &&
tcp_req->state == TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER) {
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
nvmf_tcp_req_process(ttransport, tcp_req);
}
}
static void
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(nvmf_tcp, "The offset from the start of the PDU header is %u\n",
DGET32(h2c_term_req->fei));
}
}
static void
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 Status(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);
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD);
return;
end:
nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
}
static void
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;
nvmf_tcp_h2c_term_req_dump(h2c_term_req);
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
}
static void
nvmf_tcp_pdu_payload_handle(struct spdk_nvmf_tcp_qpair *tqpair,
struct spdk_nvmf_tcp_transport *ttransport)
{
int rc = 0;
struct nvme_tcp_pdu *pdu;
uint32_t crc32c, error_offset = 0;
enum spdk_nvme_tcp_term_req_fes fes;
assert(tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD);
pdu = &tqpair->pdu_in_progress;
SPDK_DEBUGLOG(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;
nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
return;
}
}
switch (pdu->hdr.common.pdu_type) {
case SPDK_NVME_TCP_PDU_TYPE_CAPSULE_CMD:
nvmf_tcp_capsule_cmd_payload_handle(ttransport, tqpair, pdu);
break;
case SPDK_NVME_TCP_PDU_TYPE_H2C_DATA:
nvmf_tcp_h2c_data_payload_handle(ttransport, tqpair, pdu);
break;
case SPDK_NVME_TCP_PDU_TYPE_H2C_TERM_REQ:
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
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
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(nvmf_tcp, "maxr2t =%u\n", (ic_req->maxr2t + 1u));
tqpair->host_hdgst_enable = ic_req->dgst.bits.hdgst_enable ? true : false;
if (!tqpair->host_hdgst_enable) {
tqpair->recv_buf_size -= SPDK_NVME_TCP_DIGEST_LEN * SPDK_NVMF_TCP_RECV_BUF_SIZE_FACTOR;
}
tqpair->host_ddgst_enable = ic_req->dgst.bits.ddgst_enable ? true : false;
if (!tqpair->host_ddgst_enable) {
tqpair->recv_buf_size -= SPDK_NVME_TCP_DIGEST_LEN * SPDK_NVMF_TCP_RECV_BUF_SIZE_FACTOR;
}
tqpair->recv_buf_size = spdk_max(tqpair->recv_buf_size, MIN_SOCK_PIPE_SIZE);
/* Now that we know whether digests are enabled, properly size the receive buffer */
if (spdk_sock_set_recvbuf(tqpair->sock, tqpair->recv_buf_size) < 0) {
SPDK_WARNLOG("Unable to allocate enough memory for receive buffer on tqpair=%p with size=%d\n",
tqpair,
tqpair->recv_buf_size);
/* Not fatal. */
}
tqpair->cpda = spdk_min(ic_req->hpda, SPDK_NVME_TCP_CPDA_MAX);
SPDK_DEBUGLOG(nvmf_tcp, "cpda of tqpair=(%p) is : %u\n", tqpair, tqpair->cpda);
rsp_pdu = tqpair->mgmt_pdu;
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;
ic_resp->maxh2cdata = ttransport->transport.opts.max_io_size;
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(nvmf_tcp, "host_hdgst_enable: %u\n", tqpair->host_hdgst_enable);
SPDK_DEBUGLOG(nvmf_tcp, "host_ddgst_enable: %u\n", tqpair->host_ddgst_enable);
tqpair->state = NVME_TCP_QPAIR_STATE_INITIALIZING;
nvmf_tcp_qpair_write_pdu(tqpair, rsp_pdu, nvmf_tcp_send_icresp_complete, tqpair);
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
return;
end:
nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
}
static void
nvmf_tcp_pdu_psh_handle(struct spdk_nvmf_tcp_qpair *tqpair,
struct spdk_nvmf_tcp_transport *ttransport)
{
struct nvme_tcp_pdu *pdu;
int rc;
uint32_t crc32c, error_offset = 0;
enum spdk_nvme_tcp_term_req_fes fes;
assert(tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PSH);
pdu = &tqpair->pdu_in_progress;
SPDK_DEBUGLOG(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(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;
nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
return;
}
}
switch (pdu->hdr.common.pdu_type) {
case SPDK_NVME_TCP_PDU_TYPE_IC_REQ:
nvmf_tcp_icreq_handle(ttransport, tqpair, pdu);
break;
case SPDK_NVME_TCP_PDU_TYPE_CAPSULE_CMD:
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_REQ);
break;
case SPDK_NVME_TCP_PDU_TYPE_H2C_DATA:
nvmf_tcp_h2c_data_hdr_handle(ttransport, tqpair, pdu);
break;
case SPDK_NVME_TCP_PDU_TYPE_H2C_TERM_REQ:
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;
nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
break;
}
}
static void
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 {
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PSH);
nvme_tcp_pdu_calc_psh_len(&tqpair->pdu_in_progress, tqpair->host_hdgst_enable);
return;
}
err:
nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
}
static int
nvmf_tcp_pdu_payload_insert_dif(struct nvme_tcp_pdu *pdu, uint32_t read_offset,
int read_len)
{
int rc;
rc = spdk_dif_generate_stream(pdu->data_iov, pdu->data_iovcnt,
read_offset, read_len, pdu->dif_ctx);
if (rc != 0) {
SPDK_ERRLOG("DIF generate failed\n");
}
return rc;
}
static int
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;
struct spdk_nvmf_tcp_transport *ttransport = SPDK_CONTAINEROF(tqpair->qpair.transport,
struct spdk_nvmf_tcp_transport, transport);
/* The loop here is to allow for several back-to-back state changes. */
do {
prev_state = tqpair->recv_state;
SPDK_DEBUGLOG(nvmf_tcp, "tqpair(%p) recv pdu entering state %d\n", tqpair, prev_state);
pdu = &tqpair->pdu_in_progress;
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:
if (spdk_unlikely(tqpair->state == NVME_TCP_QPAIR_STATE_INITIALIZING)) {
return rc;
}
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(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)) {
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. */
nvmf_tcp_pdu_ch_handle(tqpair);
break;
/* Wait for the pdu specific header */
case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PSH:
rc = nvme_tcp_read_data(tqpair->sock,
pdu->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 < pdu->psh_len) {
return NVME_TCP_PDU_IN_PROGRESS;
}
/* All header(ch, psh, head digist) of this PDU has now been read from the socket. */
nvmf_tcp_pdu_psh_handle(tqpair, ttransport);
break;
/* Wait for the req slot */
case NVME_TCP_PDU_RECV_STATE_AWAIT_REQ:
nvmf_tcp_capsule_cmd_hdr_handle(ttransport, tqpair, pdu);
break;
case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD:
/* 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_FATAL;
}
pdu->readv_offset += rc;
if (spdk_unlikely(pdu->dif_ctx != NULL)) {
rc = nvmf_tcp_pdu_payload_insert_dif(pdu, pdu->readv_offset - rc, rc);
if (rc != 0) {
return NVME_TCP_PDU_FATAL;
}
}
if (pdu->readv_offset < data_len) {
return NVME_TCP_PDU_IN_PROGRESS;
}
/* All of this PDU has now been read from the socket. */
nvmf_tcp_pdu_payload_handle(tqpair, ttransport);
break;
case NVME_TCP_PDU_RECV_STATE_ERROR:
if (!spdk_sock_is_connected(tqpair->sock)) {
return NVME_TCP_PDU_FATAL;
}
break;
default:
assert(0);
SPDK_ERRLOG("code should not come to here");
break;
}
} while (tqpair->recv_state != prev_state);
return rc;
}
static inline void *
nvmf_tcp_control_msg_get(struct spdk_nvmf_tcp_control_msg_list *list)
{
struct spdk_nvmf_tcp_control_msg *msg;
assert(list);
msg = STAILQ_FIRST(&list->free_msgs);
if (!msg) {
SPDK_DEBUGLOG(nvmf_tcp, "Out of control messages\n");
return NULL;
}
STAILQ_REMOVE_HEAD(&list->free_msgs, link);
return msg;
}
static inline void
nvmf_tcp_control_msg_put(struct spdk_nvmf_tcp_control_msg_list *list, void *_msg)
{
struct spdk_nvmf_tcp_control_msg *msg = _msg;
assert(list);
STAILQ_INSERT_HEAD(&list->free_msgs, msg, link);
}
static int
nvmf_tcp_req_parse_sgl(struct spdk_nvmf_tcp_req *tcp_req,
struct spdk_nvmf_transport *transport,
struct spdk_nvmf_transport_poll_group *group)
{
struct spdk_nvmf_request *req = &tcp_req->req;
struct spdk_nvme_cmd *cmd;
struct spdk_nvme_cpl *rsp;
struct spdk_nvme_sgl_descriptor *sgl;
struct spdk_nvmf_tcp_poll_group *tgroup;
uint32_t length;
cmd = &req->cmd->nvme_cmd;
rsp = &req->rsp->nvme_cpl;
sgl = &cmd->dptr.sgl1;
length = sgl->unkeyed.length;
if (sgl->generic.type == SPDK_NVME_SGL_TYPE_TRANSPORT_DATA_BLOCK &&
sgl->unkeyed.subtype == SPDK_NVME_SGL_SUBTYPE_TRANSPORT) {
if (length > transport->opts.max_io_size) {
SPDK_ERRLOG("SGL length 0x%x exceeds max io size 0x%x\n",
length, transport->opts.max_io_size);
rsp->status.sc = SPDK_NVME_SC_DATA_SGL_LENGTH_INVALID;
return -1;
}
/* fill request length and populate iovs */
req->length = length;
SPDK_DEBUGLOG(nvmf_tcp, "Data requested length= 0x%x\n", length);
if (spdk_unlikely(req->dif.dif_insert_or_strip)) {
req->dif.orig_length = length;
length = spdk_dif_get_length_with_md(length, &req->dif.dif_ctx);
req->dif.elba_length = length;
}
if (spdk_nvmf_request_get_buffers(req, group, transport, length)) {
/* No available buffers. Queue this request up. */
SPDK_DEBUGLOG(nvmf_tcp, "No available large data buffers. Queueing request %p\n",
tcp_req);
return 0;
}
/* backward compatible */
req->data = req->iov[0].iov_base;
SPDK_DEBUGLOG(nvmf_tcp, "Request %p took %d buffer/s from central pool, and data=%p\n",
tcp_req, req->iovcnt, 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 = transport->opts.in_capsule_data_size;
assert(tcp_req->has_incapsule_data);
SPDK_DEBUGLOG(nvmf_tcp, "In-capsule data: offset 0x%" PRIx64 ", length 0x%x\n",
offset, 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 (spdk_unlikely(length > max_len)) {
/* According to the SPEC we should support ICD up to 8192 bytes for admin and fabric commands */
if (length <= SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE &&
(cmd->opc == SPDK_NVME_OPC_FABRIC || req->qpair->qid == 0)) {
/* Get a buffer from dedicated list */
SPDK_DEBUGLOG(nvmf_tcp, "Getting a buffer from control msg list\n");
tgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_tcp_poll_group, group);
assert(tgroup->control_msg_list);
req->data = nvmf_tcp_control_msg_get(tgroup->control_msg_list);
if (!req->data) {
/* No available buffers. Queue this request up. */
SPDK_DEBUGLOG(nvmf_tcp, "No available ICD buffers. Queueing request %p\n", tcp_req);
return 0;
}
} else {
SPDK_ERRLOG("In-capsule data length 0x%x exceeds capsule length 0x%x\n",
length, max_len);
rsp->status.sc = SPDK_NVME_SC_DATA_SGL_LENGTH_INVALID;
return -1;
}
} else {
req->data = tcp_req->buf;
}
req->length = length;
req->data_from_pool = false;
if (spdk_unlikely(req->dif.dif_insert_or_strip)) {
length = spdk_dif_get_length_with_md(length, &req->dif.dif_ctx);
req->dif.elba_length = length;
}
req->iov[0].iov_base = req->data;
req->iov[0].iov_len = length;
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 inline enum spdk_nvme_media_error_status_code
nvmf_tcp_dif_error_to_compl_status(uint8_t err_type) {
enum spdk_nvme_media_error_status_code result;
switch (err_type)
{
case SPDK_DIF_REFTAG_ERROR:
result = SPDK_NVME_SC_REFERENCE_TAG_CHECK_ERROR;
break;
case SPDK_DIF_APPTAG_ERROR:
result = SPDK_NVME_SC_APPLICATION_TAG_CHECK_ERROR;
break;
case SPDK_DIF_GUARD_ERROR:
result = SPDK_NVME_SC_GUARD_CHECK_ERROR;
break;
default:
SPDK_UNREACHABLE();
break;
}
return result;
}
static void
nvmf_tcp_send_c2h_data(struct spdk_nvmf_tcp_qpair *tqpair,
struct spdk_nvmf_tcp_req *tcp_req)
{
struct spdk_nvmf_tcp_transport *ttransport = SPDK_CONTAINEROF(
tqpair->qpair.transport, struct spdk_nvmf_tcp_transport, transport);
struct nvme_tcp_pdu *rsp_pdu;
struct spdk_nvme_tcp_c2h_data_hdr *c2h_data;
uint32_t plen, pdo, alignment;
int rc;
SPDK_DEBUGLOG(nvmf_tcp, "enter\n");
rsp_pdu = nvmf_tcp_req_pdu_init(tcp_req);
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 = tcp_req->req.length;
c2h_data->datao = 0;
/* 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;
if (spdk_unlikely(tcp_req->req.dif.dif_insert_or_strip)) {
rsp_pdu->dif_ctx = &tcp_req->req.dif.dif_ctx;
}
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(tcp_req->req.dif.dif_insert_or_strip)) {
struct spdk_nvme_cpl *rsp = &tcp_req->req.rsp->nvme_cpl;
struct spdk_dif_error err_blk = {};
rc = spdk_dif_verify_stream(rsp_pdu->data_iov, rsp_pdu->data_iovcnt,
0, rsp_pdu->data_len, rsp_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);
rsp->status.sct = SPDK_NVME_SCT_MEDIA_ERROR;
rsp->status.sc = nvmf_tcp_dif_error_to_compl_status(err_blk.err_type);
nvmf_tcp_req_pdu_fini(tcp_req);
nvmf_tcp_send_capsule_resp_pdu(tcp_req, tqpair);
return;
}
}
c2h_data->common.flags |= SPDK_NVME_TCP_C2H_DATA_FLAGS_LAST_PDU;
if (ttransport->tcp_opts.c2h_success) {
c2h_data->common.flags |= SPDK_NVME_TCP_C2H_DATA_FLAGS_SUCCESS;
}
nvmf_tcp_qpair_write_pdu(tqpair, rsp_pdu, nvmf_tcp_pdu_c2h_data_complete, tcp_req);
}
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(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);
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) {
nvmf_tcp_send_c2h_data(tqpair, tcp_req);
} else {
nvmf_tcp_send_capsule_resp_pdu(tcp_req, tqpair);
}
return 0;
}
static void
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
nvmf_tcp_req_process(struct spdk_nvmf_tcp_transport *ttransport,
struct spdk_nvmf_tcp_req *tcp_req)
{
struct spdk_nvmf_tcp_qpair *tqpair;
int rc;
enum spdk_nvmf_tcp_req_state prev_state;
bool progress = false;
struct spdk_nvmf_transport *transport = &ttransport->transport;
struct spdk_nvmf_transport_poll_group *group;
struct spdk_nvmf_tcp_poll_group *tgroup;
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);
/* If the qpair is not active, we need to abort the outstanding requests. */
if (tqpair->qpair.state != SPDK_NVMF_QPAIR_ACTIVE) {
if (tcp_req->state == TCP_REQUEST_STATE_NEED_BUFFER) {
STAILQ_REMOVE(&group->pending_buf_queue, &tcp_req->req, spdk_nvmf_request, buf_link);
}
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_COMPLETED);
}
/* The loop here is to allow for several back-to-back state changes. */
do {
prev_state = tcp_req->state;
SPDK_DEBUGLOG(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;
if (spdk_unlikely(spdk_nvmf_request_get_dif_ctx(&tcp_req->req, &tcp_req->req.dif.dif_ctx))) {
tcp_req->req.dif.dif_insert_or_strip = true;
tqpair->pdu_in_progress.dif_ctx = &tcp_req->req.dif.dif_ctx;
}
/* The next state transition depends on the data transfer needs of this request. */
tcp_req->req.xfer = spdk_nvmf_req_get_xfer(&tcp_req->req);
if (spdk_unlikely(tcp_req->req.xfer == SPDK_NVME_DATA_BIDIRECTIONAL)) {
tcp_req->req.rsp->nvme_cpl.status.sct = SPDK_NVME_SCT_GENERIC;
tcp_req->req.rsp->nvme_cpl.status.sct = SPDK_NVME_SC_INVALID_OPCODE;
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_COMPLETE);
SPDK_DEBUGLOG(nvmf_tcp, "Request %p: invalid xfer type (BIDIRECTIONAL)\n", tcp_req);
break;
}
/* If no data to transfer, ready to execute. */
if (tcp_req->req.xfer == SPDK_NVME_DATA_NONE) {
/* Reset the tqpair receving pdu state */
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
break;
}
nvmf_tcp_set_incapsule_data(tqpair, tcp_req);
if (!tcp_req->has_incapsule_data) {
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
}
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_NEED_BUFFER);
STAILQ_INSERT_TAIL(&group->pending_buf_queue, &tcp_req->req, buf_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->req != STAILQ_FIRST(&group->pending_buf_queue))) {
SPDK_DEBUGLOG(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 = nvmf_tcp_req_parse_sgl(tcp_req, transport, group);
if (rc < 0) {
STAILQ_REMOVE_HEAD(&group->pending_buf_queue, buf_link);
/* Reset the tqpair receving pdu state */
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_COMPLETE);
break;
}
if (!tcp_req->req.data) {
SPDK_DEBUGLOG(nvmf_tcp, "No buffer allocated for tcp_req(%p) on tqpair(%p\n)",
tcp_req, tqpair);
/* No buffers available. */
break;
}
STAILQ_REMOVE(&group->pending_buf_queue, &tcp_req->req, spdk_nvmf_request, buf_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) {
if (tcp_req->req.data_from_pool) {
SPDK_DEBUGLOG(nvmf_tcp, "Sending R2T for tcp_req(%p) on tqpair=%p\n", tcp_req, tqpair);
nvmf_tcp_send_r2t_pdu(tqpair, tcp_req);
} else {
struct nvme_tcp_pdu *pdu;
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER);
pdu = &tqpair->pdu_in_progress;
SPDK_DEBUGLOG(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);
nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD);
}
break;
}
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
break;
case TCP_REQUEST_STATE_AWAITING_R2T_ACK:
spdk_trace_record(TRACE_TCP_REQUEST_STATE_AWAIT_R2T_ACK, 0, 0, (uintptr_t)tcp_req, 0);
/* The R2T completion or the h2c data incoming will kick it out of this state. */
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);
if (spdk_unlikely(tcp_req->req.dif.dif_insert_or_strip)) {
assert(tcp_req->req.dif.elba_length >= tcp_req->req.length);
tcp_req->req.length = tcp_req->req.dif.elba_length;
}
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);
if (spdk_unlikely(tcp_req->req.dif.dif_insert_or_strip)) {
tcp_req->req.length = tcp_req->req.dif.orig_length;
}
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->req.data_from_pool) {
spdk_nvmf_request_free_buffers(&tcp_req->req, group, transport);
} else if (spdk_unlikely(tcp_req->has_incapsule_data && (tcp_req->cmd.opc == SPDK_NVME_OPC_FABRIC ||
tqpair->qpair.qid == 0) && tcp_req->req.length > transport->opts.in_capsule_data_size)) {
tgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_tcp_poll_group, group);
assert(tgroup->control_msg_list);
SPDK_DEBUGLOG(nvmf_tcp, "Put buf to control msg list\n");
nvmf_tcp_control_msg_put(tgroup->control_msg_list, tcp_req->req.data);
}
tcp_req->req.length = 0;
tcp_req->req.iovcnt = 0;
tcp_req->req.data = NULL;
nvmf_tcp_req_pdu_fini(tcp_req);
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
nvmf_tcp_sock_cb(void *arg, struct spdk_sock_group *group, struct spdk_sock *sock)
{
struct spdk_nvmf_tcp_qpair *tqpair = arg;
int rc;
assert(tqpair != NULL);
rc = nvmf_tcp_sock_process(tqpair);
/* If there was a new socket error, disconnect */
if (rc < 0) {
nvmf_tcp_qpair_disconnect(tqpair);
}
}
static int
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,
nvmf_tcp_sock_cb, tqpair);
if (rc != 0) {
SPDK_ERRLOG("Could not add sock to sock_group: %s (%d)\n",
spdk_strerror(errno), errno);
return -1;
}
rc = nvmf_tcp_qpair_sock_init(tqpair);
if (rc != 0) {
SPDK_ERRLOG("Cannot set sock opt for tqpair=%p\n", tqpair);
return -1;
}
rc = nvmf_tcp_qpair_init(&tqpair->qpair);
if (rc < 0) {
SPDK_ERRLOG("Cannot init tqpair=%p\n", tqpair);
return -1;
}
rc = nvmf_tcp_qpair_init_mem_resource(tqpair);
if (rc < 0) {
SPDK_ERRLOG("Cannot init memory resource info for tqpair=%p\n", tqpair);
return -1;
}
tqpair->group = tgroup;
tqpair->state = NVME_TCP_QPAIR_STATE_INVALID;
TAILQ_INSERT_TAIL(&tgroup->qpairs, tqpair, link);
return 0;
}
static int
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(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
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);
nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_EXECUTED);
nvmf_tcp_req_process(ttransport, tcp_req);
return 0;
}
static void
nvmf_tcp_close_qpair(struct spdk_nvmf_qpair *qpair,
spdk_nvmf_transport_qpair_fini_cb cb_fn, void *cb_arg)
{
struct spdk_nvmf_tcp_qpair *tqpair;
SPDK_DEBUGLOG(nvmf_tcp, "Qpair: %p\n", qpair);
tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
tqpair->state = NVME_TCP_QPAIR_STATE_EXITED;
nvmf_tcp_qpair_destroy(tqpair);
if (cb_fn) {
cb_fn(cb_arg);
}
}
static int
nvmf_tcp_poll_group_poll(struct spdk_nvmf_transport_poll_group *group)
{
struct spdk_nvmf_tcp_poll_group *tgroup;
int rc;
struct spdk_nvmf_request *req, *req_tmp;
struct spdk_nvmf_tcp_req *tcp_req;
struct spdk_nvmf_tcp_transport *ttransport = SPDK_CONTAINEROF(group->transport,
struct spdk_nvmf_tcp_transport, transport);
tgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_tcp_poll_group, group);
if (spdk_unlikely(TAILQ_EMPTY(&tgroup->qpairs))) {
return 0;
}
STAILQ_FOREACH_SAFE(req, &group->pending_buf_queue, buf_link, req_tmp) {
tcp_req = SPDK_CONTAINEROF(req, struct spdk_nvmf_tcp_req, req);
if (nvmf_tcp_req_process(ttransport, tcp_req) == false) {
break;
}
}
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;
}
static int
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);
spdk_nvme_trid_populate_transport(trid, 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_ipv6(tqpair->sock)) {
trid->adrfam = SPDK_NVMF_ADRFAM_IPV6;
} else {
return -1;
}
snprintf(trid->trsvcid, sizeof(trid->trsvcid), "%d", port);
return 0;
}
static int
nvmf_tcp_qpair_get_local_trid(struct spdk_nvmf_qpair *qpair,
struct spdk_nvme_transport_id *trid)
{
return nvmf_tcp_qpair_get_trid(qpair, trid, 0);
}
static int
nvmf_tcp_qpair_get_peer_trid(struct spdk_nvmf_qpair *qpair,
struct spdk_nvme_transport_id *trid)
{
return nvmf_tcp_qpair_get_trid(qpair, trid, 1);
}
static int
nvmf_tcp_qpair_get_listen_trid(struct spdk_nvmf_qpair *qpair,
struct spdk_nvme_transport_id *trid)
{
return nvmf_tcp_qpair_get_trid(qpair, trid, 0);
}
static void
nvmf_tcp_req_set_abort_status(struct spdk_nvmf_request *req,
struct spdk_nvmf_tcp_req *tcp_req_to_abort)
{
tcp_req_to_abort->req.rsp->nvme_cpl.status.sct = SPDK_NVME_SCT_GENERIC;
tcp_req_to_abort->req.rsp->nvme_cpl.status.sc = SPDK_NVME_SC_ABORTED_BY_REQUEST;
nvmf_tcp_req_set_state(tcp_req_to_abort, TCP_REQUEST_STATE_READY_TO_COMPLETE);
req->rsp->nvme_cpl.cdw0 &= ~1U; /* Command was successfully aborted. */
}
static int
_nvmf_tcp_qpair_abort_request(void *ctx)
{
struct spdk_nvmf_request *req = ctx;
struct spdk_nvmf_tcp_req *tcp_req_to_abort = SPDK_CONTAINEROF(req->req_to_abort,
struct spdk_nvmf_tcp_req, req);
struct spdk_nvmf_tcp_qpair *tqpair = SPDK_CONTAINEROF(req->req_to_abort->qpair,
struct spdk_nvmf_tcp_qpair, qpair);
int rc;
spdk_poller_unregister(&req->poller);
switch (tcp_req_to_abort->state) {
case TCP_REQUEST_STATE_EXECUTING:
rc = nvmf_ctrlr_abort_request(req);
if (rc == SPDK_NVMF_REQUEST_EXEC_STATUS_ASYNCHRONOUS) {
return SPDK_POLLER_BUSY;
}
break;
case TCP_REQUEST_STATE_NEED_BUFFER:
STAILQ_REMOVE(&tqpair->group->group.pending_buf_queue,
&tcp_req_to_abort->req, spdk_nvmf_request, buf_link);
nvmf_tcp_req_set_abort_status(req, tcp_req_to_abort);
break;
case TCP_REQUEST_STATE_AWAITING_R2T_ACK:
nvmf_tcp_req_set_abort_status(req, tcp_req_to_abort);
break;
case TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER:
if (spdk_get_ticks() < req->timeout_tsc) {
req->poller = SPDK_POLLER_REGISTER(_nvmf_tcp_qpair_abort_request, req, 0);
return SPDK_POLLER_BUSY;
}
break;
default:
break;
}
spdk_nvmf_request_complete(req);
return SPDK_POLLER_BUSY;
}
static void
nvmf_tcp_qpair_abort_request(struct spdk_nvmf_qpair *qpair,
struct spdk_nvmf_request *req)
{
struct spdk_nvmf_tcp_qpair *tqpair;
struct spdk_nvmf_tcp_transport *ttransport;
struct spdk_nvmf_transport *transport;
uint16_t cid;
uint32_t i;
struct spdk_nvmf_tcp_req *tcp_req_to_abort = NULL;
tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
ttransport = SPDK_CONTAINEROF(qpair->transport, struct spdk_nvmf_tcp_transport, transport);
transport = &ttransport->transport;
cid = req->cmd->nvme_cmd.cdw10_bits.abort.cid;
for (i = 0; i < tqpair->resource_count; i++) {
tcp_req_to_abort = &tqpair->reqs[i];
if (tcp_req_to_abort->state != TCP_REQUEST_STATE_FREE &&
tcp_req_to_abort->req.cmd->nvme_cmd.cid == cid) {
break;
}
}
if (tcp_req_to_abort == NULL) {
spdk_nvmf_request_complete(req);
return;
}
req->req_to_abort = &tcp_req_to_abort->req;
req->timeout_tsc = spdk_get_ticks() +
transport->opts.abort_timeout_sec * spdk_get_ticks_hz();
req->poller = NULL;
_nvmf_tcp_qpair_abort_request(req);
}
#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_DIF_INSERT_OR_STRIP false
#define SPDK_NVMF_TCP_DEFAULT_ABORT_TIMEOUT_SEC 1
static void
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->dif_insert_or_strip = SPDK_NVMF_TCP_DEFAULT_DIF_INSERT_OR_STRIP;
opts->abort_timeout_sec = SPDK_NVMF_TCP_DEFAULT_ABORT_TIMEOUT_SEC;
opts->transport_specific = NULL;
}
const struct spdk_nvmf_transport_ops spdk_nvmf_transport_tcp = {
.name = "TCP",
.type = SPDK_NVME_TRANSPORT_TCP,
.opts_init = nvmf_tcp_opts_init,
.create = nvmf_tcp_create,
.dump_opts = nvmf_tcp_dump_opts,
.destroy = nvmf_tcp_destroy,
.listen = nvmf_tcp_listen,
.stop_listen = nvmf_tcp_stop_listen,
.accept = nvmf_tcp_accept,
.listener_discover = nvmf_tcp_discover,
.poll_group_create = nvmf_tcp_poll_group_create,
.get_optimal_poll_group = nvmf_tcp_get_optimal_poll_group,
.poll_group_destroy = nvmf_tcp_poll_group_destroy,
.poll_group_add = nvmf_tcp_poll_group_add,
.poll_group_remove = nvmf_tcp_poll_group_remove,
.poll_group_poll = nvmf_tcp_poll_group_poll,
.req_free = nvmf_tcp_req_free,
.req_complete = nvmf_tcp_req_complete,
.qpair_fini = nvmf_tcp_close_qpair,
.qpair_get_local_trid = nvmf_tcp_qpair_get_local_trid,
.qpair_get_peer_trid = nvmf_tcp_qpair_get_peer_trid,
.qpair_get_listen_trid = nvmf_tcp_qpair_get_listen_trid,
.qpair_abort_request = nvmf_tcp_qpair_abort_request,
};
SPDK_NVMF_TRANSPORT_REGISTER(tcp, &spdk_nvmf_transport_tcp);
SPDK_LOG_REGISTER_COMPONENT(nvmf_tcp)
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