LCOV - code coverage report
Current view: top level - lib/nvmf - tcp.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 652 1788 36.5 %
Date: 2024-07-14 01:39:21 Functions: 44 98 44.9 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2018 Intel Corporation. All rights reserved.
       3             :  *   Copyright (c) 2019, 2020 Mellanox Technologies LTD. All rights reserved.
       4             :  *   Copyright (c) 2022, 2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
       5             :  */
       6             : 
       7             : #include "spdk/accel.h"
       8             : #include "spdk/stdinc.h"
       9             : #include "spdk/crc32.h"
      10             : #include "spdk/endian.h"
      11             : #include "spdk/assert.h"
      12             : #include "spdk/thread.h"
      13             : #include "spdk/nvmf_transport.h"
      14             : #include "spdk/string.h"
      15             : #include "spdk/trace.h"
      16             : #include "spdk/util.h"
      17             : #include "spdk/log.h"
      18             : 
      19             : #include "spdk_internal/assert.h"
      20             : #include "spdk_internal/nvme_tcp.h"
      21             : #include "spdk_internal/sock.h"
      22             : 
      23             : #include "nvmf_internal.h"
      24             : 
      25             : #include "spdk_internal/trace_defs.h"
      26             : 
      27             : #define NVMF_TCP_MAX_ACCEPT_SOCK_ONE_TIME 16
      28             : #define SPDK_NVMF_TCP_DEFAULT_MAX_SOCK_PRIORITY 16
      29             : #define SPDK_NVMF_TCP_DEFAULT_SOCK_PRIORITY 0
      30             : #define SPDK_NVMF_TCP_DEFAULT_CONTROL_MSG_NUM 32
      31             : #define SPDK_NVMF_TCP_DEFAULT_SUCCESS_OPTIMIZATION true
      32             : 
      33             : #define SPDK_NVMF_TCP_MIN_IO_QUEUE_DEPTH 2
      34             : #define SPDK_NVMF_TCP_MAX_IO_QUEUE_DEPTH 65535
      35             : #define SPDK_NVMF_TCP_MIN_ADMIN_QUEUE_DEPTH 2
      36             : #define SPDK_NVMF_TCP_MAX_ADMIN_QUEUE_DEPTH 4096
      37             : 
      38             : #define SPDK_NVMF_TCP_DEFAULT_MAX_IO_QUEUE_DEPTH 128
      39             : #define SPDK_NVMF_TCP_DEFAULT_MAX_ADMIN_QUEUE_DEPTH 128
      40             : #define SPDK_NVMF_TCP_DEFAULT_MAX_QPAIRS_PER_CTRLR 128
      41             : #define SPDK_NVMF_TCP_DEFAULT_IN_CAPSULE_DATA_SIZE 4096
      42             : #define SPDK_NVMF_TCP_DEFAULT_MAX_IO_SIZE 131072
      43             : #define SPDK_NVMF_TCP_DEFAULT_IO_UNIT_SIZE 131072
      44             : #define SPDK_NVMF_TCP_DEFAULT_NUM_SHARED_BUFFERS 511
      45             : #define SPDK_NVMF_TCP_DEFAULT_BUFFER_CACHE_SIZE UINT32_MAX
      46             : #define SPDK_NVMF_TCP_DEFAULT_DIF_INSERT_OR_STRIP false
      47             : #define SPDK_NVMF_TCP_DEFAULT_ABORT_TIMEOUT_SEC 1
      48             : 
      49             : #define TCP_PSK_INVALID_PERMISSIONS 0177
      50             : 
      51             : const struct spdk_nvmf_transport_ops spdk_nvmf_transport_tcp;
      52             : static bool g_tls_log = false;
      53             : 
      54             : /* spdk nvmf related structure */
      55             : enum spdk_nvmf_tcp_req_state {
      56             : 
      57             :         /* The request is not currently in use */
      58             :         TCP_REQUEST_STATE_FREE = 0,
      59             : 
      60             :         /* Initial state when request first received */
      61             :         TCP_REQUEST_STATE_NEW = 1,
      62             : 
      63             :         /* The request is queued until a data buffer is available. */
      64             :         TCP_REQUEST_STATE_NEED_BUFFER = 2,
      65             : 
      66             :         /* The request is waiting for zcopy_start to finish */
      67             :         TCP_REQUEST_STATE_AWAITING_ZCOPY_START = 3,
      68             : 
      69             :         /* The request has received a zero-copy buffer */
      70             :         TCP_REQUEST_STATE_ZCOPY_START_COMPLETED = 4,
      71             : 
      72             :         /* The request is currently transferring data from the host to the controller. */
      73             :         TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER = 5,
      74             : 
      75             :         /* The request is waiting for the R2T send acknowledgement. */
      76             :         TCP_REQUEST_STATE_AWAITING_R2T_ACK = 6,
      77             : 
      78             :         /* The request is ready to execute at the block device */
      79             :         TCP_REQUEST_STATE_READY_TO_EXECUTE = 7,
      80             : 
      81             :         /* The request is currently executing at the block device */
      82             :         TCP_REQUEST_STATE_EXECUTING = 8,
      83             : 
      84             :         /* The request is waiting for zcopy buffers to be committed */
      85             :         TCP_REQUEST_STATE_AWAITING_ZCOPY_COMMIT = 9,
      86             : 
      87             :         /* The request finished executing at the block device */
      88             :         TCP_REQUEST_STATE_EXECUTED = 10,
      89             : 
      90             :         /* The request is ready to send a completion */
      91             :         TCP_REQUEST_STATE_READY_TO_COMPLETE = 11,
      92             : 
      93             :         /* The request is currently transferring final pdus from the controller to the host. */
      94             :         TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST = 12,
      95             : 
      96             :         /* The request is waiting for zcopy buffers to be released (without committing) */
      97             :         TCP_REQUEST_STATE_AWAITING_ZCOPY_RELEASE = 13,
      98             : 
      99             :         /* The request completed and can be marked free. */
     100             :         TCP_REQUEST_STATE_COMPLETED = 14,
     101             : 
     102             :         /* Terminator */
     103             :         TCP_REQUEST_NUM_STATES,
     104             : };
     105             : 
     106             : static const char *spdk_nvmf_tcp_term_req_fes_str[] = {
     107             :         "Invalid PDU Header Field",
     108             :         "PDU Sequence Error",
     109             :         "Header Digiest Error",
     110             :         "Data Transfer Out of Range",
     111             :         "R2T Limit Exceeded",
     112             :         "Unsupported parameter",
     113             : };
     114             : 
     115           1 : SPDK_TRACE_REGISTER_FN(nvmf_tcp_trace, "nvmf_tcp", TRACE_GROUP_NVMF_TCP)
     116             : {
     117           0 :         spdk_trace_register_owner(OWNER_NVMF_TCP, 't');
     118           0 :         spdk_trace_register_object(OBJECT_NVMF_TCP_IO, 'r');
     119           0 :         spdk_trace_register_description("TCP_REQ_NEW",
     120             :                                         TRACE_TCP_REQUEST_STATE_NEW,
     121             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 1,
     122             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     123           0 :         spdk_trace_register_description("TCP_REQ_NEED_BUFFER",
     124             :                                         TRACE_TCP_REQUEST_STATE_NEED_BUFFER,
     125             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 0,
     126             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     127           0 :         spdk_trace_register_description("TCP_REQ_WAIT_ZCPY_START",
     128             :                                         TRACE_TCP_REQUEST_STATE_AWAIT_ZCOPY_START,
     129             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 0,
     130             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     131           0 :         spdk_trace_register_description("TCP_REQ_ZCPY_START_CPL",
     132             :                                         TRACE_TCP_REQUEST_STATE_ZCOPY_START_COMPLETED,
     133             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 0,
     134             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     135           0 :         spdk_trace_register_description("TCP_REQ_TX_H_TO_C",
     136             :                                         TRACE_TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER,
     137             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 0,
     138             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     139           0 :         spdk_trace_register_description("TCP_REQ_RDY_TO_EXECUTE",
     140             :                                         TRACE_TCP_REQUEST_STATE_READY_TO_EXECUTE,
     141             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 0,
     142             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     143           0 :         spdk_trace_register_description("TCP_REQ_EXECUTING",
     144             :                                         TRACE_TCP_REQUEST_STATE_EXECUTING,
     145             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 0,
     146             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     147           0 :         spdk_trace_register_description("TCP_REQ_WAIT_ZCPY_CMT",
     148             :                                         TRACE_TCP_REQUEST_STATE_AWAIT_ZCOPY_COMMIT,
     149             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 0,
     150             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     151           0 :         spdk_trace_register_description("TCP_REQ_EXECUTED",
     152             :                                         TRACE_TCP_REQUEST_STATE_EXECUTED,
     153             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 0,
     154             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     155           0 :         spdk_trace_register_description("TCP_REQ_RDY_TO_COMPLETE",
     156             :                                         TRACE_TCP_REQUEST_STATE_READY_TO_COMPLETE,
     157             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 0,
     158             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     159           0 :         spdk_trace_register_description("TCP_REQ_TRANSFER_C2H",
     160             :                                         TRACE_TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST,
     161             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 0,
     162             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     163           0 :         spdk_trace_register_description("TCP_REQ_AWAIT_ZCPY_RLS",
     164             :                                         TRACE_TCP_REQUEST_STATE_AWAIT_ZCOPY_RELEASE,
     165             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 0,
     166             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     167           0 :         spdk_trace_register_description("TCP_REQ_COMPLETED",
     168             :                                         TRACE_TCP_REQUEST_STATE_COMPLETED,
     169             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 0,
     170             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     171           0 :         spdk_trace_register_description("TCP_WRITE_START",
     172             :                                         TRACE_TCP_FLUSH_WRITEBUF_START,
     173             :                                         OWNER_NVMF_TCP, OBJECT_NONE, 0,
     174             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     175           0 :         spdk_trace_register_description("TCP_WRITE_DONE",
     176             :                                         TRACE_TCP_FLUSH_WRITEBUF_DONE,
     177             :                                         OWNER_NVMF_TCP, OBJECT_NONE, 0,
     178             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     179           0 :         spdk_trace_register_description("TCP_READ_DONE",
     180             :                                         TRACE_TCP_READ_FROM_SOCKET_DONE,
     181             :                                         OWNER_NVMF_TCP, OBJECT_NONE, 0,
     182             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     183           0 :         spdk_trace_register_description("TCP_REQ_AWAIT_R2T_ACK",
     184             :                                         TRACE_TCP_REQUEST_STATE_AWAIT_R2T_ACK,
     185             :                                         OWNER_NVMF_TCP, OBJECT_NVMF_TCP_IO, 0,
     186             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     187             : 
     188           0 :         spdk_trace_register_description("TCP_QP_CREATE", TRACE_TCP_QP_CREATE,
     189             :                                         OWNER_NVMF_TCP, OBJECT_NONE, 0,
     190             :                                         SPDK_TRACE_ARG_TYPE_INT, "");
     191           0 :         spdk_trace_register_description("TCP_QP_SOCK_INIT", TRACE_TCP_QP_SOCK_INIT,
     192             :                                         OWNER_NVMF_TCP, OBJECT_NONE, 0,
     193             :                                         SPDK_TRACE_ARG_TYPE_INT, "");
     194           0 :         spdk_trace_register_description("TCP_QP_STATE_CHANGE", TRACE_TCP_QP_STATE_CHANGE,
     195             :                                         OWNER_NVMF_TCP, OBJECT_NONE, 0,
     196             :                                         SPDK_TRACE_ARG_TYPE_INT, "state");
     197           0 :         spdk_trace_register_description("TCP_QP_DISCONNECT", TRACE_TCP_QP_DISCONNECT,
     198             :                                         OWNER_NVMF_TCP, OBJECT_NONE, 0,
     199             :                                         SPDK_TRACE_ARG_TYPE_INT, "");
     200           0 :         spdk_trace_register_description("TCP_QP_DESTROY", TRACE_TCP_QP_DESTROY,
     201             :                                         OWNER_NVMF_TCP, OBJECT_NONE, 0,
     202             :                                         SPDK_TRACE_ARG_TYPE_INT, "");
     203           0 :         spdk_trace_register_description("TCP_QP_ABORT_REQ", TRACE_TCP_QP_ABORT_REQ,
     204             :                                         OWNER_NVMF_TCP, OBJECT_NONE, 0,
     205             :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     206           0 :         spdk_trace_register_description("TCP_QP_RCV_STATE_CHANGE", TRACE_TCP_QP_RCV_STATE_CHANGE,
     207             :                                         OWNER_NVMF_TCP, OBJECT_NONE, 0,
     208             :                                         SPDK_TRACE_ARG_TYPE_INT, "state");
     209             : 
     210           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_IO_START, OBJECT_NVMF_TCP_IO, 1);
     211           0 :         spdk_trace_tpoint_register_relation(TRACE_BDEV_IO_DONE, OBJECT_NVMF_TCP_IO, 0);
     212           0 : }
     213             : 
     214             : struct spdk_nvmf_tcp_req  {
     215             :         struct spdk_nvmf_request                req;
     216             :         struct spdk_nvme_cpl                    rsp;
     217             :         struct spdk_nvme_cmd                    cmd;
     218             : 
     219             :         /* A PDU that can be used for sending responses. This is
     220             :          * not the incoming PDU! */
     221             :         struct nvme_tcp_pdu                     *pdu;
     222             : 
     223             :         /* In-capsule data buffer */
     224             :         uint8_t                                 *buf;
     225             : 
     226             :         struct spdk_nvmf_tcp_req                *fused_pair;
     227             : 
     228             :         /*
     229             :          * The PDU for a request may be used multiple times in serial over
     230             :          * the request's lifetime. For example, first to send an R2T, then
     231             :          * to send a completion. To catch mistakes where the PDU is used
     232             :          * twice at the same time, add a debug flag here for init/fini.
     233             :          */
     234             :         bool                                    pdu_in_use;
     235             :         bool                                    has_in_capsule_data;
     236             :         bool                                    fused_failed;
     237             : 
     238             :         /* transfer_tag */
     239             :         uint16_t                                ttag;
     240             : 
     241             :         enum spdk_nvmf_tcp_req_state            state;
     242             : 
     243             :         /*
     244             :          * h2c_offset is used when we receive the h2c_data PDU.
     245             :          */
     246             :         uint32_t                                h2c_offset;
     247             : 
     248             :         STAILQ_ENTRY(spdk_nvmf_tcp_req)         link;
     249             :         TAILQ_ENTRY(spdk_nvmf_tcp_req)          state_link;
     250             : };
     251             : 
     252             : struct spdk_nvmf_tcp_qpair {
     253             :         struct spdk_nvmf_qpair                  qpair;
     254             :         struct spdk_nvmf_tcp_poll_group         *group;
     255             :         struct spdk_sock                        *sock;
     256             : 
     257             :         enum nvme_tcp_pdu_recv_state            recv_state;
     258             :         enum nvme_tcp_qpair_state               state;
     259             : 
     260             :         /* PDU being actively received */
     261             :         struct nvme_tcp_pdu                     *pdu_in_progress;
     262             : 
     263             :         struct spdk_nvmf_tcp_req                *fused_first;
     264             : 
     265             :         /* Queues to track the requests in all states */
     266             :         TAILQ_HEAD(, spdk_nvmf_tcp_req)         tcp_req_working_queue;
     267             :         TAILQ_HEAD(, spdk_nvmf_tcp_req)         tcp_req_free_queue;
     268             :         SLIST_HEAD(, nvme_tcp_pdu)              tcp_pdu_free_queue;
     269             :         /* Number of working pdus */
     270             :         uint32_t                                tcp_pdu_working_count;
     271             : 
     272             :         /* Number of requests in each state */
     273             :         uint32_t                                state_cntr[TCP_REQUEST_NUM_STATES];
     274             : 
     275             :         uint8_t                                 cpda;
     276             : 
     277             :         bool                                    host_hdgst_enable;
     278             :         bool                                    host_ddgst_enable;
     279             : 
     280             :         /* This is a spare PDU used for sending special management
     281             :          * operations. Primarily, this is used for the initial
     282             :          * connection response and c2h termination request. */
     283             :         struct nvme_tcp_pdu                     *mgmt_pdu;
     284             : 
     285             :         /* Arrays of in-capsule buffers, requests, and pdus.
     286             :          * Each array is 'resource_count' number of elements */
     287             :         void                                    *bufs;
     288             :         struct spdk_nvmf_tcp_req                *reqs;
     289             :         struct nvme_tcp_pdu                     *pdus;
     290             :         uint32_t                                resource_count;
     291             :         uint32_t                                recv_buf_size;
     292             : 
     293             :         struct spdk_nvmf_tcp_port               *port;
     294             : 
     295             :         /* IP address */
     296             :         char                                    initiator_addr[SPDK_NVMF_TRADDR_MAX_LEN];
     297             :         char                                    target_addr[SPDK_NVMF_TRADDR_MAX_LEN];
     298             : 
     299             :         /* IP port */
     300             :         uint16_t                                initiator_port;
     301             :         uint16_t                                target_port;
     302             : 
     303             :         /* Wait until the host terminates the connection (e.g. after sending C2HTermReq) */
     304             :         bool                                    wait_terminate;
     305             : 
     306             :         /* Timer used to destroy qpair after detecting transport error issue if initiator does
     307             :          *  not close the connection.
     308             :          */
     309             :         struct spdk_poller                      *timeout_poller;
     310             : 
     311             :         spdk_nvmf_transport_qpair_fini_cb       fini_cb_fn;
     312             :         void                                    *fini_cb_arg;
     313             : 
     314             :         TAILQ_ENTRY(spdk_nvmf_tcp_qpair)        link;
     315             : };
     316             : 
     317             : struct spdk_nvmf_tcp_control_msg {
     318             :         STAILQ_ENTRY(spdk_nvmf_tcp_control_msg) link;
     319             : };
     320             : 
     321             : struct spdk_nvmf_tcp_control_msg_list {
     322             :         void *msg_buf;
     323             :         STAILQ_HEAD(, spdk_nvmf_tcp_control_msg) free_msgs;
     324             : };
     325             : 
     326             : struct spdk_nvmf_tcp_poll_group {
     327             :         struct spdk_nvmf_transport_poll_group   group;
     328             :         struct spdk_sock_group                  *sock_group;
     329             : 
     330             :         TAILQ_HEAD(, spdk_nvmf_tcp_qpair)       qpairs;
     331             :         TAILQ_HEAD(, spdk_nvmf_tcp_qpair)       await_req;
     332             : 
     333             :         struct spdk_io_channel                  *accel_channel;
     334             :         struct spdk_nvmf_tcp_control_msg_list   *control_msg_list;
     335             : 
     336             :         TAILQ_ENTRY(spdk_nvmf_tcp_poll_group)   link;
     337             : };
     338             : 
     339             : struct spdk_nvmf_tcp_port {
     340             :         const struct spdk_nvme_transport_id     *trid;
     341             :         struct spdk_sock                        *listen_sock;
     342             :         TAILQ_ENTRY(spdk_nvmf_tcp_port)         link;
     343             : };
     344             : 
     345             : struct tcp_transport_opts {
     346             :         bool            c2h_success;
     347             :         uint16_t        control_msg_num;
     348             :         uint32_t        sock_priority;
     349             : };
     350             : 
     351             : struct tcp_psk_entry {
     352             :         char                            hostnqn[SPDK_NVMF_NQN_MAX_LEN + 1];
     353             :         char                            subnqn[SPDK_NVMF_NQN_MAX_LEN + 1];
     354             :         char                            psk_identity[NVMF_PSK_IDENTITY_LEN];
     355             :         uint8_t                         psk[SPDK_TLS_PSK_MAX_LEN];
     356             : 
     357             :         /* Original path saved to emit SPDK configuration via "save_config". */
     358             :         char                            psk_path[PATH_MAX];
     359             :         uint32_t                        psk_size;
     360             :         enum nvme_tcp_cipher_suite      tls_cipher_suite;
     361             :         TAILQ_ENTRY(tcp_psk_entry)      link;
     362             : };
     363             : 
     364             : struct spdk_nvmf_tcp_transport {
     365             :         struct spdk_nvmf_transport              transport;
     366             :         struct tcp_transport_opts               tcp_opts;
     367             : 
     368             :         struct spdk_nvmf_tcp_poll_group         *next_pg;
     369             : 
     370             :         struct spdk_poller                      *accept_poller;
     371             : 
     372             :         TAILQ_HEAD(, spdk_nvmf_tcp_port)        ports;
     373             :         TAILQ_HEAD(, spdk_nvmf_tcp_poll_group)  poll_groups;
     374             : 
     375             :         TAILQ_HEAD(, tcp_psk_entry)             psks;
     376             : };
     377             : 
     378             : static const struct spdk_json_object_decoder tcp_transport_opts_decoder[] = {
     379             :         {
     380             :                 "c2h_success", offsetof(struct tcp_transport_opts, c2h_success),
     381             :                 spdk_json_decode_bool, true
     382             :         },
     383             :         {
     384             :                 "control_msg_num", offsetof(struct tcp_transport_opts, control_msg_num),
     385             :                 spdk_json_decode_uint16, true
     386             :         },
     387             :         {
     388             :                 "sock_priority", offsetof(struct tcp_transport_opts, sock_priority),
     389             :                 spdk_json_decode_uint32, true
     390             :         },
     391             : };
     392             : 
     393             : static bool nvmf_tcp_req_process(struct spdk_nvmf_tcp_transport *ttransport,
     394             :                                  struct spdk_nvmf_tcp_req *tcp_req);
     395             : static void nvmf_tcp_poll_group_destroy(struct spdk_nvmf_transport_poll_group *group);
     396             : 
     397             : static void _nvmf_tcp_send_c2h_data(struct spdk_nvmf_tcp_qpair *tqpair,
     398             :                                     struct spdk_nvmf_tcp_req *tcp_req);
     399             : 
     400             : static inline void
     401           7 : nvmf_tcp_req_set_state(struct spdk_nvmf_tcp_req *tcp_req,
     402             :                        enum spdk_nvmf_tcp_req_state state)
     403             : {
     404             :         struct spdk_nvmf_qpair *qpair;
     405             :         struct spdk_nvmf_tcp_qpair *tqpair;
     406             : 
     407           7 :         qpair = tcp_req->req.qpair;
     408           7 :         tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
     409             : 
     410           7 :         assert(tqpair->state_cntr[tcp_req->state] > 0);
     411           7 :         tqpair->state_cntr[tcp_req->state]--;
     412           7 :         tqpair->state_cntr[state]++;
     413             : 
     414           7 :         tcp_req->state = state;
     415           7 : }
     416             : 
     417             : static inline struct nvme_tcp_pdu *
     418           7 : nvmf_tcp_req_pdu_init(struct spdk_nvmf_tcp_req *tcp_req)
     419             : {
     420           7 :         assert(tcp_req->pdu_in_use == false);
     421             : 
     422           7 :         memset(tcp_req->pdu, 0, sizeof(*tcp_req->pdu));
     423           7 :         tcp_req->pdu->qpair = SPDK_CONTAINEROF(tcp_req->req.qpair, struct spdk_nvmf_tcp_qpair, qpair);
     424             : 
     425           7 :         return tcp_req->pdu;
     426             : }
     427             : 
     428             : static struct spdk_nvmf_tcp_req *
     429           1 : nvmf_tcp_req_get(struct spdk_nvmf_tcp_qpair *tqpair)
     430             : {
     431             :         struct spdk_nvmf_tcp_req *tcp_req;
     432             : 
     433           1 :         tcp_req = TAILQ_FIRST(&tqpair->tcp_req_free_queue);
     434           1 :         if (spdk_unlikely(!tcp_req)) {
     435           0 :                 return NULL;
     436             :         }
     437             : 
     438           1 :         memset(&tcp_req->rsp, 0, sizeof(tcp_req->rsp));
     439           1 :         tcp_req->h2c_offset = 0;
     440           1 :         tcp_req->has_in_capsule_data = false;
     441           1 :         tcp_req->req.dif_enabled = false;
     442           1 :         tcp_req->req.zcopy_phase = NVMF_ZCOPY_PHASE_NONE;
     443             : 
     444           1 :         TAILQ_REMOVE(&tqpair->tcp_req_free_queue, tcp_req, state_link);
     445           1 :         TAILQ_INSERT_TAIL(&tqpair->tcp_req_working_queue, tcp_req, state_link);
     446           1 :         nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_NEW);
     447           1 :         return tcp_req;
     448             : }
     449             : 
     450             : static inline void
     451           0 : nvmf_tcp_req_put(struct spdk_nvmf_tcp_qpair *tqpair, struct spdk_nvmf_tcp_req *tcp_req)
     452             : {
     453           0 :         assert(!tcp_req->pdu_in_use);
     454             : 
     455           0 :         TAILQ_REMOVE(&tqpair->tcp_req_working_queue, tcp_req, state_link);
     456           0 :         TAILQ_INSERT_TAIL(&tqpair->tcp_req_free_queue, tcp_req, state_link);
     457           0 :         nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_FREE);
     458           0 : }
     459             : 
     460             : static void
     461           0 : nvmf_tcp_request_free(void *cb_arg)
     462             : {
     463             :         struct spdk_nvmf_tcp_transport *ttransport;
     464           0 :         struct spdk_nvmf_tcp_req *tcp_req = cb_arg;
     465             : 
     466           0 :         assert(tcp_req != NULL);
     467             : 
     468           0 :         SPDK_DEBUGLOG(nvmf_tcp, "tcp_req=%p will be freed\n", tcp_req);
     469           0 :         ttransport = SPDK_CONTAINEROF(tcp_req->req.qpair->transport,
     470             :                                       struct spdk_nvmf_tcp_transport, transport);
     471           0 :         nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_COMPLETED);
     472           0 :         nvmf_tcp_req_process(ttransport, tcp_req);
     473           0 : }
     474             : 
     475             : static int
     476           0 : nvmf_tcp_req_free(struct spdk_nvmf_request *req)
     477             : {
     478           0 :         struct spdk_nvmf_tcp_req *tcp_req = SPDK_CONTAINEROF(req, struct spdk_nvmf_tcp_req, req);
     479             : 
     480           0 :         nvmf_tcp_request_free(tcp_req);
     481             : 
     482           0 :         return 0;
     483             : }
     484             : 
     485             : static void
     486           6 : nvmf_tcp_drain_state_queue(struct spdk_nvmf_tcp_qpair *tqpair,
     487             :                            enum spdk_nvmf_tcp_req_state state)
     488             : {
     489             :         struct spdk_nvmf_tcp_req *tcp_req, *req_tmp;
     490             : 
     491           6 :         assert(state != TCP_REQUEST_STATE_FREE);
     492           6 :         TAILQ_FOREACH_SAFE(tcp_req, &tqpair->tcp_req_working_queue, state_link, req_tmp) {
     493           0 :                 if (state == tcp_req->state) {
     494           0 :                         nvmf_tcp_request_free(tcp_req);
     495             :                 }
     496             :         }
     497           6 : }
     498             : 
     499             : static void
     500           1 : nvmf_tcp_cleanup_all_states(struct spdk_nvmf_tcp_qpair *tqpair)
     501             : {
     502             :         struct spdk_nvmf_tcp_req *tcp_req, *req_tmp;
     503             : 
     504           1 :         nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST);
     505           1 :         nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_NEW);
     506             : 
     507             :         /* Wipe the requests waiting for buffer from the global list */
     508           1 :         TAILQ_FOREACH_SAFE(tcp_req, &tqpair->tcp_req_working_queue, state_link, req_tmp) {
     509           0 :                 if (tcp_req->state == TCP_REQUEST_STATE_NEED_BUFFER) {
     510           0 :                         STAILQ_REMOVE(&tqpair->group->group.pending_buf_queue, &tcp_req->req,
     511             :                                       spdk_nvmf_request, buf_link);
     512             :                 }
     513             :         }
     514             : 
     515           1 :         nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_NEED_BUFFER);
     516           1 :         nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_EXECUTING);
     517           1 :         nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER);
     518           1 :         nvmf_tcp_drain_state_queue(tqpair, TCP_REQUEST_STATE_AWAITING_R2T_ACK);
     519           1 : }
     520             : 
     521             : static void
     522           0 : nvmf_tcp_dump_qpair_req_contents(struct spdk_nvmf_tcp_qpair *tqpair)
     523             : {
     524             :         int i;
     525             :         struct spdk_nvmf_tcp_req *tcp_req;
     526             : 
     527           0 :         SPDK_ERRLOG("Dumping contents of queue pair (QID %d)\n", tqpair->qpair.qid);
     528           0 :         for (i = 1; i < TCP_REQUEST_NUM_STATES; i++) {
     529           0 :                 SPDK_ERRLOG("\tNum of requests in state[%d] = %u\n", i, tqpair->state_cntr[i]);
     530           0 :                 TAILQ_FOREACH(tcp_req, &tqpair->tcp_req_working_queue, state_link) {
     531           0 :                         if ((int)tcp_req->state == i) {
     532           0 :                                 SPDK_ERRLOG("\t\tRequest Data From Pool: %d\n", tcp_req->req.data_from_pool);
     533           0 :                                 SPDK_ERRLOG("\t\tRequest opcode: %d\n", tcp_req->req.cmd->nvmf_cmd.opcode);
     534             :                         }
     535             :                 }
     536             :         }
     537           0 : }
     538             : 
     539             : static void
     540           1 : _nvmf_tcp_qpair_destroy(void *_tqpair)
     541             : {
     542           1 :         struct spdk_nvmf_tcp_qpair *tqpair = _tqpair;
     543           1 :         spdk_nvmf_transport_qpair_fini_cb cb_fn = tqpair->fini_cb_fn;
     544           1 :         void *cb_arg = tqpair->fini_cb_arg;
     545           1 :         int err = 0;
     546             : 
     547           1 :         spdk_trace_record(TRACE_TCP_QP_DESTROY, 0, 0, (uintptr_t)tqpair);
     548             : 
     549           1 :         SPDK_DEBUGLOG(nvmf_tcp, "enter\n");
     550             : 
     551           1 :         err = spdk_sock_close(&tqpair->sock);
     552           1 :         assert(err == 0);
     553           1 :         nvmf_tcp_cleanup_all_states(tqpair);
     554             : 
     555           1 :         if (tqpair->state_cntr[TCP_REQUEST_STATE_FREE] != tqpair->resource_count) {
     556           0 :                 SPDK_ERRLOG("tqpair(%p) free tcp request num is %u but should be %u\n", tqpair,
     557             :                             tqpair->state_cntr[TCP_REQUEST_STATE_FREE],
     558             :                             tqpair->resource_count);
     559           0 :                 err++;
     560             :         }
     561             : 
     562           1 :         if (err > 0) {
     563           0 :                 nvmf_tcp_dump_qpair_req_contents(tqpair);
     564             :         }
     565             : 
     566             :         /* The timeout poller might still be registered here if we close the qpair before host
     567             :          * terminates the connection.
     568             :          */
     569           1 :         spdk_poller_unregister(&tqpair->timeout_poller);
     570           1 :         spdk_dma_free(tqpair->pdus);
     571           1 :         free(tqpair->reqs);
     572           1 :         spdk_free(tqpair->bufs);
     573           1 :         free(tqpair);
     574             : 
     575           1 :         if (cb_fn != NULL) {
     576           0 :                 cb_fn(cb_arg);
     577             :         }
     578             : 
     579           1 :         SPDK_DEBUGLOG(nvmf_tcp, "Leave\n");
     580           1 : }
     581             : 
     582             : static void
     583           1 : nvmf_tcp_qpair_destroy(struct spdk_nvmf_tcp_qpair *tqpair)
     584             : {
     585             :         /* Delay the destruction to make sure it isn't performed from the context of a sock
     586             :          * callback.  Otherwise, spdk_sock_close() might not abort pending requests, causing their
     587             :          * completions to be executed after the qpair is freed.  (Note: this fixed issue #2471.)
     588             :          */
     589           1 :         spdk_thread_send_msg(spdk_get_thread(), _nvmf_tcp_qpair_destroy, tqpair);
     590           1 : }
     591             : 
     592             : static void
     593           0 : nvmf_tcp_dump_opts(struct spdk_nvmf_transport *transport, struct spdk_json_write_ctx *w)
     594             : {
     595             :         struct spdk_nvmf_tcp_transport  *ttransport;
     596           0 :         assert(w != NULL);
     597             : 
     598           0 :         ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
     599           0 :         spdk_json_write_named_bool(w, "c2h_success", ttransport->tcp_opts.c2h_success);
     600           0 :         spdk_json_write_named_uint32(w, "sock_priority", ttransport->tcp_opts.sock_priority);
     601           0 : }
     602             : 
     603             : static int
     604           5 : nvmf_tcp_destroy(struct spdk_nvmf_transport *transport,
     605             :                  spdk_nvmf_transport_destroy_done_cb cb_fn, void *cb_arg)
     606             : {
     607             :         struct spdk_nvmf_tcp_transport  *ttransport;
     608             :         struct tcp_psk_entry *entry, *tmp;
     609             : 
     610           5 :         assert(transport != NULL);
     611           5 :         ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
     612             : 
     613           5 :         TAILQ_FOREACH_SAFE(entry, &ttransport->psks, link, tmp) {
     614           0 :                 TAILQ_REMOVE(&ttransport->psks, entry, link);
     615           0 :                 free(entry);
     616             :         }
     617             : 
     618           5 :         spdk_poller_unregister(&ttransport->accept_poller);
     619           5 :         free(ttransport);
     620             : 
     621           5 :         if (cb_fn) {
     622           0 :                 cb_fn(cb_arg);
     623             :         }
     624           5 :         return 0;
     625             : }
     626             : 
     627             : static int nvmf_tcp_accept(void *ctx);
     628             : 
     629             : static struct spdk_nvmf_transport *
     630           6 : nvmf_tcp_create(struct spdk_nvmf_transport_opts *opts)
     631             : {
     632             :         struct spdk_nvmf_tcp_transport *ttransport;
     633             :         uint32_t sge_count;
     634             :         uint32_t min_shared_buffers;
     635             : 
     636           6 :         ttransport = calloc(1, sizeof(*ttransport));
     637           6 :         if (!ttransport) {
     638           0 :                 return NULL;
     639             :         }
     640             : 
     641           6 :         TAILQ_INIT(&ttransport->ports);
     642           6 :         TAILQ_INIT(&ttransport->poll_groups);
     643           6 :         TAILQ_INIT(&ttransport->psks);
     644             : 
     645           6 :         ttransport->transport.ops = &spdk_nvmf_transport_tcp;
     646             : 
     647           6 :         ttransport->tcp_opts.c2h_success = SPDK_NVMF_TCP_DEFAULT_SUCCESS_OPTIMIZATION;
     648           6 :         ttransport->tcp_opts.sock_priority = SPDK_NVMF_TCP_DEFAULT_SOCK_PRIORITY;
     649           6 :         ttransport->tcp_opts.control_msg_num = SPDK_NVMF_TCP_DEFAULT_CONTROL_MSG_NUM;
     650           6 :         if (opts->transport_specific != NULL &&
     651           0 :             spdk_json_decode_object_relaxed(opts->transport_specific, tcp_transport_opts_decoder,
     652             :                                             SPDK_COUNTOF(tcp_transport_opts_decoder),
     653           0 :                                             &ttransport->tcp_opts)) {
     654           0 :                 SPDK_ERRLOG("spdk_json_decode_object_relaxed failed\n");
     655           0 :                 free(ttransport);
     656           0 :                 return NULL;
     657             :         }
     658             : 
     659           6 :         SPDK_NOTICELOG("*** TCP Transport Init ***\n");
     660             : 
     661           6 :         SPDK_INFOLOG(nvmf_tcp, "*** TCP Transport Init ***\n"
     662             :                      "  Transport opts:  max_ioq_depth=%d, max_io_size=%d,\n"
     663             :                      "  max_io_qpairs_per_ctrlr=%d, io_unit_size=%d,\n"
     664             :                      "  in_capsule_data_size=%d, max_aq_depth=%d\n"
     665             :                      "  num_shared_buffers=%d, c2h_success=%d,\n"
     666             :                      "  dif_insert_or_strip=%d, sock_priority=%d\n"
     667             :                      "  abort_timeout_sec=%d, control_msg_num=%hu\n",
     668             :                      opts->max_queue_depth,
     669             :                      opts->max_io_size,
     670             :                      opts->max_qpairs_per_ctrlr - 1,
     671             :                      opts->io_unit_size,
     672             :                      opts->in_capsule_data_size,
     673             :                      opts->max_aq_depth,
     674             :                      opts->num_shared_buffers,
     675             :                      ttransport->tcp_opts.c2h_success,
     676             :                      opts->dif_insert_or_strip,
     677             :                      ttransport->tcp_opts.sock_priority,
     678             :                      opts->abort_timeout_sec,
     679             :                      ttransport->tcp_opts.control_msg_num);
     680             : 
     681           6 :         if (ttransport->tcp_opts.sock_priority > SPDK_NVMF_TCP_DEFAULT_MAX_SOCK_PRIORITY) {
     682           0 :                 SPDK_ERRLOG("Unsupported socket_priority=%d, the current range is: 0 to %d\n"
     683             :                             "you can use man 7 socket to view the range of priority under SO_PRIORITY item\n",
     684             :                             ttransport->tcp_opts.sock_priority, SPDK_NVMF_TCP_DEFAULT_MAX_SOCK_PRIORITY);
     685           0 :                 free(ttransport);
     686           0 :                 return NULL;
     687             :         }
     688             : 
     689           6 :         if (ttransport->tcp_opts.control_msg_num == 0 &&
     690           0 :             opts->in_capsule_data_size < SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE) {
     691           0 :                 SPDK_WARNLOG("TCP param control_msg_num can't be 0 if ICD is less than %u bytes. Using default value %u\n",
     692             :                              SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE, SPDK_NVMF_TCP_DEFAULT_CONTROL_MSG_NUM);
     693           0 :                 ttransport->tcp_opts.control_msg_num = SPDK_NVMF_TCP_DEFAULT_CONTROL_MSG_NUM;
     694             :         }
     695             : 
     696             :         /* I/O unit size cannot be larger than max I/O size */
     697           6 :         if (opts->io_unit_size > opts->max_io_size) {
     698           1 :                 SPDK_WARNLOG("TCP param io_unit_size %u can't be larger than max_io_size %u. Using max_io_size as io_unit_size\n",
     699             :                              opts->io_unit_size, opts->max_io_size);
     700           1 :                 opts->io_unit_size = opts->max_io_size;
     701             :         }
     702             : 
     703             :         /* In capsule data size cannot be larger than max I/O size */
     704           6 :         if (opts->in_capsule_data_size > opts->max_io_size) {
     705           0 :                 SPDK_WARNLOG("TCP param ICD size %u can't be larger than max_io_size %u. Using max_io_size as ICD size\n",
     706             :                              opts->io_unit_size, opts->max_io_size);
     707           0 :                 opts->in_capsule_data_size = opts->max_io_size;
     708             :         }
     709             : 
     710             :         /* max IO queue depth cannot be smaller than 2 or larger than 65535.
     711             :          * We will not check SPDK_NVMF_TCP_MAX_IO_QUEUE_DEPTH, because max_queue_depth is 16bits and always not larger than 64k. */
     712           6 :         if (opts->max_queue_depth < SPDK_NVMF_TCP_MIN_IO_QUEUE_DEPTH) {
     713           0 :                 SPDK_WARNLOG("TCP param max_queue_depth %u can't be smaller than %u or larger than %u. Using default value %u\n",
     714             :                              opts->max_queue_depth, SPDK_NVMF_TCP_MIN_IO_QUEUE_DEPTH,
     715             :                              SPDK_NVMF_TCP_MAX_IO_QUEUE_DEPTH, SPDK_NVMF_TCP_DEFAULT_MAX_IO_QUEUE_DEPTH);
     716           0 :                 opts->max_queue_depth = SPDK_NVMF_TCP_DEFAULT_MAX_IO_QUEUE_DEPTH;
     717             :         }
     718             : 
     719             :         /* max admin queue depth cannot be smaller than 2 or larger than 4096 */
     720           6 :         if (opts->max_aq_depth < SPDK_NVMF_TCP_MIN_ADMIN_QUEUE_DEPTH ||
     721           6 :             opts->max_aq_depth > SPDK_NVMF_TCP_MAX_ADMIN_QUEUE_DEPTH) {
     722           0 :                 SPDK_WARNLOG("TCP param max_aq_depth %u can't be smaller than %u or larger than %u. Using default value %u\n",
     723             :                              opts->max_aq_depth, SPDK_NVMF_TCP_MIN_ADMIN_QUEUE_DEPTH,
     724             :                              SPDK_NVMF_TCP_MAX_ADMIN_QUEUE_DEPTH, SPDK_NVMF_TCP_DEFAULT_MAX_ADMIN_QUEUE_DEPTH);
     725           0 :                 opts->max_aq_depth = SPDK_NVMF_TCP_DEFAULT_MAX_ADMIN_QUEUE_DEPTH;
     726             :         }
     727             : 
     728           6 :         sge_count = opts->max_io_size / opts->io_unit_size;
     729           6 :         if (sge_count > SPDK_NVMF_MAX_SGL_ENTRIES) {
     730           1 :                 SPDK_ERRLOG("Unsupported IO Unit size specified, %d bytes\n", opts->io_unit_size);
     731           1 :                 free(ttransport);
     732           1 :                 return NULL;
     733             :         }
     734             : 
     735             :         /* If buf_cache_size == UINT32_MAX, we will dynamically pick a cache size later that we know will fit. */
     736           5 :         if (opts->buf_cache_size < UINT32_MAX) {
     737           5 :                 min_shared_buffers = spdk_env_get_core_count() * opts->buf_cache_size;
     738           5 :                 if (min_shared_buffers > opts->num_shared_buffers) {
     739           0 :                         SPDK_ERRLOG("There are not enough buffers to satisfy "
     740             :                                     "per-poll group caches for each thread. (%" PRIu32 ") "
     741             :                                     "supplied. (%" PRIu32 ") required\n", opts->num_shared_buffers, min_shared_buffers);
     742           0 :                         SPDK_ERRLOG("Please specify a larger number of shared buffers\n");
     743           0 :                         free(ttransport);
     744           0 :                         return NULL;
     745             :                 }
     746             :         }
     747             : 
     748           5 :         ttransport->accept_poller = SPDK_POLLER_REGISTER(nvmf_tcp_accept, &ttransport->transport,
     749             :                                     opts->acceptor_poll_rate);
     750           5 :         if (!ttransport->accept_poller) {
     751           0 :                 free(ttransport);
     752           0 :                 return NULL;
     753             :         }
     754             : 
     755           5 :         return &ttransport->transport;
     756             : }
     757             : 
     758             : static int
     759           0 : nvmf_tcp_trsvcid_to_int(const char *trsvcid)
     760             : {
     761             :         unsigned long long ull;
     762           0 :         char *end = NULL;
     763             : 
     764           0 :         ull = strtoull(trsvcid, &end, 10);
     765           0 :         if (end == NULL || end == trsvcid || *end != '\0') {
     766           0 :                 return -1;
     767             :         }
     768             : 
     769             :         /* Valid TCP/IP port numbers are in [1, 65535] */
     770           0 :         if (ull == 0 || ull > 65535) {
     771           0 :                 return -1;
     772             :         }
     773             : 
     774           0 :         return (int)ull;
     775             : }
     776             : 
     777             : /**
     778             :  * Canonicalize a listen address trid.
     779             :  */
     780             : static int
     781           0 : nvmf_tcp_canon_listen_trid(struct spdk_nvme_transport_id *canon_trid,
     782             :                            const struct spdk_nvme_transport_id *trid)
     783             : {
     784             :         int trsvcid_int;
     785             : 
     786           0 :         trsvcid_int = nvmf_tcp_trsvcid_to_int(trid->trsvcid);
     787           0 :         if (trsvcid_int < 0) {
     788           0 :                 return -EINVAL;
     789             :         }
     790             : 
     791           0 :         memset(canon_trid, 0, sizeof(*canon_trid));
     792           0 :         spdk_nvme_trid_populate_transport(canon_trid, SPDK_NVME_TRANSPORT_TCP);
     793           0 :         canon_trid->adrfam = trid->adrfam;
     794           0 :         snprintf(canon_trid->traddr, sizeof(canon_trid->traddr), "%s", trid->traddr);
     795           0 :         snprintf(canon_trid->trsvcid, sizeof(canon_trid->trsvcid), "%d", trsvcid_int);
     796             : 
     797           0 :         return 0;
     798             : }
     799             : 
     800             : /**
     801             :  * Find an existing listening port.
     802             :  */
     803             : static struct spdk_nvmf_tcp_port *
     804           0 : nvmf_tcp_find_port(struct spdk_nvmf_tcp_transport *ttransport,
     805             :                    const struct spdk_nvme_transport_id *trid)
     806             : {
     807           0 :         struct spdk_nvme_transport_id canon_trid;
     808             :         struct spdk_nvmf_tcp_port *port;
     809             : 
     810           0 :         if (nvmf_tcp_canon_listen_trid(&canon_trid, trid) != 0) {
     811           0 :                 return NULL;
     812             :         }
     813             : 
     814           0 :         TAILQ_FOREACH(port, &ttransport->ports, link) {
     815           0 :                 if (spdk_nvme_transport_id_compare(&canon_trid, port->trid) == 0) {
     816           0 :                         return port;
     817             :                 }
     818             :         }
     819             : 
     820           0 :         return NULL;
     821             : }
     822             : 
     823             : static int
     824           0 : tcp_sock_get_key(uint8_t *out, int out_len, const char **cipher, const char *psk_identity,
     825             :                  void *get_key_ctx)
     826             : {
     827             :         struct tcp_psk_entry *entry;
     828           0 :         struct spdk_nvmf_tcp_transport *ttransport = get_key_ctx;
     829             :         size_t psk_len;
     830             :         int rc;
     831             : 
     832           0 :         TAILQ_FOREACH(entry, &ttransport->psks, link) {
     833           0 :                 if (strcmp(psk_identity, entry->psk_identity) != 0) {
     834           0 :                         continue;
     835             :                 }
     836             : 
     837           0 :                 psk_len = entry->psk_size;
     838           0 :                 if ((size_t)out_len < psk_len) {
     839           0 :                         SPDK_ERRLOG("Out buffer of size: %" PRIu32 " cannot fit PSK of len: %lu\n",
     840             :                                     out_len, psk_len);
     841           0 :                         return -ENOBUFS;
     842             :                 }
     843             : 
     844             :                 /* Convert PSK to the TLS PSK format. */
     845           0 :                 rc = nvme_tcp_derive_tls_psk(entry->psk, psk_len, psk_identity, out, out_len,
     846             :                                              entry->tls_cipher_suite);
     847           0 :                 if (rc < 0) {
     848           0 :                         SPDK_ERRLOG("Could not generate TLS PSK\n");
     849             :                 }
     850             : 
     851           0 :                 switch (entry->tls_cipher_suite) {
     852           0 :                 case NVME_TCP_CIPHER_AES_128_GCM_SHA256:
     853           0 :                         *cipher = "TLS_AES_128_GCM_SHA256";
     854           0 :                         break;
     855           0 :                 case NVME_TCP_CIPHER_AES_256_GCM_SHA384:
     856           0 :                         *cipher = "TLS_AES_256_GCM_SHA384";
     857           0 :                         break;
     858           0 :                 default:
     859           0 :                         *cipher = NULL;
     860           0 :                         return -ENOTSUP;
     861             :                 }
     862             : 
     863           0 :                 return rc;
     864             :         }
     865             : 
     866           0 :         SPDK_ERRLOG("Could not find PSK for identity: %s\n", psk_identity);
     867             : 
     868           0 :         return -EINVAL;
     869             : }
     870             : 
     871             : static int
     872           0 : nvmf_tcp_listen(struct spdk_nvmf_transport *transport, const struct spdk_nvme_transport_id *trid,
     873             :                 struct spdk_nvmf_listen_opts *listen_opts)
     874             : {
     875             :         struct spdk_nvmf_tcp_transport *ttransport;
     876             :         struct spdk_nvmf_tcp_port *port;
     877             :         int trsvcid_int;
     878             :         uint8_t adrfam;
     879             :         const char *sock_impl_name;
     880           0 :         struct spdk_sock_impl_opts impl_opts;
     881           0 :         size_t impl_opts_size = sizeof(impl_opts);
     882           0 :         struct spdk_sock_opts opts;
     883             : 
     884           0 :         if (!strlen(trid->trsvcid)) {
     885           0 :                 SPDK_ERRLOG("Service id is required\n");
     886           0 :                 return -EINVAL;
     887             :         }
     888             : 
     889           0 :         ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
     890             : 
     891           0 :         trsvcid_int = nvmf_tcp_trsvcid_to_int(trid->trsvcid);
     892           0 :         if (trsvcid_int < 0) {
     893           0 :                 SPDK_ERRLOG("Invalid trsvcid '%s'\n", trid->trsvcid);
     894           0 :                 return -EINVAL;
     895             :         }
     896             : 
     897           0 :         port = calloc(1, sizeof(*port));
     898           0 :         if (!port) {
     899           0 :                 SPDK_ERRLOG("Port allocation failed\n");
     900           0 :                 return -ENOMEM;
     901             :         }
     902             : 
     903           0 :         port->trid = trid;
     904             : 
     905           0 :         sock_impl_name = NULL;
     906             : 
     907           0 :         opts.opts_size = sizeof(opts);
     908           0 :         spdk_sock_get_default_opts(&opts);
     909           0 :         opts.priority = ttransport->tcp_opts.sock_priority;
     910           0 :         if (listen_opts->secure_channel) {
     911           0 :                 if (!g_tls_log) {
     912           0 :                         SPDK_NOTICELOG("TLS support is considered experimental\n");
     913           0 :                         g_tls_log = true;
     914             :                 }
     915           0 :                 sock_impl_name = "ssl";
     916           0 :                 spdk_sock_impl_get_opts(sock_impl_name, &impl_opts, &impl_opts_size);
     917           0 :                 impl_opts.tls_version = SPDK_TLS_VERSION_1_3;
     918           0 :                 impl_opts.get_key = tcp_sock_get_key;
     919           0 :                 impl_opts.get_key_ctx = ttransport;
     920           0 :                 impl_opts.tls_cipher_suites = "TLS_AES_256_GCM_SHA384:TLS_AES_128_GCM_SHA256";
     921           0 :                 opts.impl_opts = &impl_opts;
     922           0 :                 opts.impl_opts_size = sizeof(impl_opts);
     923             :         }
     924             : 
     925           0 :         port->listen_sock = spdk_sock_listen_ext(trid->traddr, trsvcid_int,
     926             :                             sock_impl_name, &opts);
     927           0 :         if (port->listen_sock == NULL) {
     928           0 :                 SPDK_ERRLOG("spdk_sock_listen(%s, %d) failed: %s (%d)\n",
     929             :                             trid->traddr, trsvcid_int,
     930             :                             spdk_strerror(errno), errno);
     931           0 :                 free(port);
     932           0 :                 return -errno;
     933             :         }
     934             : 
     935           0 :         if (spdk_sock_is_ipv4(port->listen_sock)) {
     936           0 :                 adrfam = SPDK_NVMF_ADRFAM_IPV4;
     937           0 :         } else if (spdk_sock_is_ipv6(port->listen_sock)) {
     938           0 :                 adrfam = SPDK_NVMF_ADRFAM_IPV6;
     939             :         } else {
     940           0 :                 SPDK_ERRLOG("Unhandled socket type\n");
     941           0 :                 adrfam = 0;
     942             :         }
     943             : 
     944           0 :         if (adrfam != trid->adrfam) {
     945           0 :                 SPDK_ERRLOG("Socket address family mismatch\n");
     946           0 :                 spdk_sock_close(&port->listen_sock);
     947           0 :                 free(port);
     948           0 :                 return -EINVAL;
     949             :         }
     950             : 
     951           0 :         SPDK_NOTICELOG("*** NVMe/TCP Target Listening on %s port %s ***\n",
     952             :                        trid->traddr, trid->trsvcid);
     953             : 
     954           0 :         TAILQ_INSERT_TAIL(&ttransport->ports, port, link);
     955           0 :         return 0;
     956             : }
     957             : 
     958             : static void
     959           0 : nvmf_tcp_stop_listen(struct spdk_nvmf_transport *transport,
     960             :                      const struct spdk_nvme_transport_id *trid)
     961             : {
     962             :         struct spdk_nvmf_tcp_transport *ttransport;
     963             :         struct spdk_nvmf_tcp_port *port;
     964             : 
     965           0 :         ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
     966             : 
     967           0 :         SPDK_DEBUGLOG(nvmf_tcp, "Removing listen address %s port %s\n",
     968             :                       trid->traddr, trid->trsvcid);
     969             : 
     970           0 :         port = nvmf_tcp_find_port(ttransport, trid);
     971           0 :         if (port) {
     972           0 :                 TAILQ_REMOVE(&ttransport->ports, port, link);
     973           0 :                 spdk_sock_close(&port->listen_sock);
     974           0 :                 free(port);
     975             :         }
     976           0 : }
     977             : 
     978             : static void nvmf_tcp_qpair_set_recv_state(struct spdk_nvmf_tcp_qpair *tqpair,
     979             :                 enum nvme_tcp_pdu_recv_state state);
     980             : 
     981             : static void
     982           1 : nvmf_tcp_qpair_set_state(struct spdk_nvmf_tcp_qpair *tqpair, enum nvme_tcp_qpair_state state)
     983             : {
     984           1 :         tqpair->state = state;
     985           1 :         spdk_trace_record(TRACE_TCP_QP_STATE_CHANGE, tqpair->qpair.qid, 0, (uintptr_t)tqpair,
     986             :                           tqpair->state);
     987           1 : }
     988             : 
     989             : static void
     990           0 : nvmf_tcp_qpair_disconnect(struct spdk_nvmf_tcp_qpair *tqpair)
     991             : {
     992           0 :         SPDK_DEBUGLOG(nvmf_tcp, "Disconnecting qpair %p\n", tqpair);
     993             : 
     994           0 :         spdk_trace_record(TRACE_TCP_QP_DISCONNECT, 0, 0, (uintptr_t)tqpair);
     995             : 
     996           0 :         if (tqpair->state <= NVME_TCP_QPAIR_STATE_RUNNING) {
     997           0 :                 nvmf_tcp_qpair_set_state(tqpair, NVME_TCP_QPAIR_STATE_EXITING);
     998           0 :                 assert(tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_ERROR);
     999           0 :                 spdk_poller_unregister(&tqpair->timeout_poller);
    1000             : 
    1001             :                 /* This will end up calling nvmf_tcp_close_qpair */
    1002           0 :                 spdk_nvmf_qpair_disconnect(&tqpair->qpair, NULL, NULL);
    1003             :         }
    1004           0 : }
    1005             : 
    1006             : static void
    1007          16 : _mgmt_pdu_write_done(void *_tqpair, int err)
    1008             : {
    1009          16 :         struct spdk_nvmf_tcp_qpair *tqpair = _tqpair;
    1010          16 :         struct nvme_tcp_pdu *pdu = tqpair->mgmt_pdu;
    1011             : 
    1012          16 :         if (spdk_unlikely(err != 0)) {
    1013          16 :                 nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_QUIESCING);
    1014          16 :                 return;
    1015             :         }
    1016             : 
    1017           0 :         assert(pdu->cb_fn != NULL);
    1018           0 :         pdu->cb_fn(pdu->cb_arg);
    1019             : }
    1020             : 
    1021             : static void
    1022           0 : _req_pdu_write_done(void *req, int err)
    1023             : {
    1024           0 :         struct spdk_nvmf_tcp_req *tcp_req = req;
    1025           0 :         struct nvme_tcp_pdu *pdu = tcp_req->pdu;
    1026           0 :         struct spdk_nvmf_tcp_qpair *tqpair = pdu->qpair;
    1027             : 
    1028           0 :         assert(tcp_req->pdu_in_use);
    1029           0 :         tcp_req->pdu_in_use = false;
    1030             : 
    1031             :         /* If the request is in a completed state, we're waiting for write completion to free it */
    1032           0 :         if (spdk_unlikely(tcp_req->state == TCP_REQUEST_STATE_COMPLETED)) {
    1033           0 :                 nvmf_tcp_request_free(tcp_req);
    1034           0 :                 return;
    1035             :         }
    1036             : 
    1037           0 :         if (spdk_unlikely(err != 0)) {
    1038           0 :                 nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_QUIESCING);
    1039           0 :                 return;
    1040             :         }
    1041             : 
    1042           0 :         assert(pdu->cb_fn != NULL);
    1043           0 :         pdu->cb_fn(pdu->cb_arg);
    1044             : }
    1045             : 
    1046             : static void
    1047          16 : _pdu_write_done(struct nvme_tcp_pdu *pdu, int err)
    1048             : {
    1049          16 :         pdu->sock_req.cb_fn(pdu->sock_req.cb_arg, err);
    1050          16 : }
    1051             : 
    1052             : static void
    1053          23 : _tcp_write_pdu(struct nvme_tcp_pdu *pdu)
    1054             : {
    1055             :         int rc;
    1056          23 :         uint32_t mapped_length;
    1057          23 :         struct spdk_nvmf_tcp_qpair *tqpair = pdu->qpair;
    1058             : 
    1059          46 :         pdu->sock_req.iovcnt = nvme_tcp_build_iovs(pdu->iov, SPDK_COUNTOF(pdu->iov), pdu,
    1060          23 :                                tqpair->host_hdgst_enable, tqpair->host_ddgst_enable, &mapped_length);
    1061          23 :         spdk_sock_writev_async(tqpair->sock, &pdu->sock_req);
    1062             : 
    1063          23 :         if (pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_IC_RESP ||
    1064          22 :             pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_C2H_TERM_REQ) {
    1065             :                 /* Try to force the send immediately. */
    1066          16 :                 rc = spdk_sock_flush(tqpair->sock);
    1067          16 :                 if (rc > 0 && (uint32_t)rc == mapped_length) {
    1068           0 :                         _pdu_write_done(pdu, 0);
    1069             :                 } else {
    1070          16 :                         SPDK_ERRLOG("Could not write %s to socket: rc=%d, errno=%d\n",
    1071             :                                     pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_IC_RESP ?
    1072             :                                     "IC_RESP" : "TERM_REQ", rc, errno);
    1073          16 :                         _pdu_write_done(pdu, rc >= 0 ? -EAGAIN : -errno);
    1074             :                 }
    1075             :         }
    1076          23 : }
    1077             : 
    1078             : static void
    1079           0 : data_crc32_accel_done(void *cb_arg, int status)
    1080             : {
    1081           0 :         struct nvme_tcp_pdu *pdu = cb_arg;
    1082             : 
    1083           0 :         if (spdk_unlikely(status)) {
    1084           0 :                 SPDK_ERRLOG("Failed to compute the data digest for pdu =%p\n", pdu);
    1085           0 :                 _pdu_write_done(pdu, status);
    1086           0 :                 return;
    1087             :         }
    1088             : 
    1089           0 :         pdu->data_digest_crc32 ^= SPDK_CRC32C_XOR;
    1090           0 :         MAKE_DIGEST_WORD(pdu->data_digest, pdu->data_digest_crc32);
    1091             : 
    1092           0 :         _tcp_write_pdu(pdu);
    1093             : }
    1094             : 
    1095             : static void
    1096          23 : pdu_data_crc32_compute(struct nvme_tcp_pdu *pdu)
    1097             : {
    1098          23 :         struct spdk_nvmf_tcp_qpair *tqpair = pdu->qpair;
    1099          23 :         int rc = 0;
    1100             : 
    1101             :         /* Data Digest */
    1102          23 :         if (pdu->data_len > 0 && g_nvme_tcp_ddgst[pdu->hdr.common.pdu_type] && tqpair->host_ddgst_enable) {
    1103             :                 /* Only support this limitated case for the first step */
    1104           0 :                 if (spdk_likely(!pdu->dif_ctx && (pdu->data_len % SPDK_NVME_TCP_DIGEST_ALIGNMENT == 0)
    1105             :                                 && tqpair->group)) {
    1106           0 :                         rc = spdk_accel_submit_crc32cv(tqpair->group->accel_channel, &pdu->data_digest_crc32, pdu->data_iov,
    1107             :                                                        pdu->data_iovcnt, 0, data_crc32_accel_done, pdu);
    1108           0 :                         if (spdk_likely(rc == 0)) {
    1109           0 :                                 return;
    1110             :                         }
    1111             :                 } else {
    1112           0 :                         pdu->data_digest_crc32 = nvme_tcp_pdu_calc_data_digest(pdu);
    1113             :                 }
    1114           0 :                 data_crc32_accel_done(pdu, rc);
    1115             :         } else {
    1116          23 :                 _tcp_write_pdu(pdu);
    1117             :         }
    1118             : }
    1119             : 
    1120             : static void
    1121          23 : nvmf_tcp_qpair_write_pdu(struct spdk_nvmf_tcp_qpair *tqpair,
    1122             :                          struct nvme_tcp_pdu *pdu,
    1123             :                          nvme_tcp_qpair_xfer_complete_cb cb_fn,
    1124             :                          void *cb_arg)
    1125             : {
    1126             :         int hlen;
    1127             :         uint32_t crc32c;
    1128             : 
    1129          23 :         assert(tqpair->pdu_in_progress != pdu);
    1130             : 
    1131          23 :         hlen = pdu->hdr.common.hlen;
    1132          23 :         pdu->cb_fn = cb_fn;
    1133          23 :         pdu->cb_arg = cb_arg;
    1134             : 
    1135          23 :         pdu->iov[0].iov_base = &pdu->hdr.raw;
    1136          23 :         pdu->iov[0].iov_len = hlen;
    1137             : 
    1138             :         /* Header Digest */
    1139          23 :         if (g_nvme_tcp_hdgst[pdu->hdr.common.pdu_type] && tqpair->host_hdgst_enable) {
    1140           1 :                 crc32c = nvme_tcp_pdu_calc_header_digest(pdu);
    1141           1 :                 MAKE_DIGEST_WORD((uint8_t *)pdu->hdr.raw + hlen, crc32c);
    1142             :         }
    1143             : 
    1144             :         /* Data Digest */
    1145          23 :         pdu_data_crc32_compute(pdu);
    1146          23 : }
    1147             : 
    1148             : static void
    1149          16 : nvmf_tcp_qpair_write_mgmt_pdu(struct spdk_nvmf_tcp_qpair *tqpair,
    1150             :                               nvme_tcp_qpair_xfer_complete_cb cb_fn,
    1151             :                               void *cb_arg)
    1152             : {
    1153          16 :         struct nvme_tcp_pdu *pdu = tqpair->mgmt_pdu;
    1154             : 
    1155          16 :         pdu->sock_req.cb_fn = _mgmt_pdu_write_done;
    1156          16 :         pdu->sock_req.cb_arg = tqpair;
    1157             : 
    1158          16 :         nvmf_tcp_qpair_write_pdu(tqpair, pdu, cb_fn, cb_arg);
    1159          16 : }
    1160             : 
    1161             : static void
    1162           7 : nvmf_tcp_qpair_write_req_pdu(struct spdk_nvmf_tcp_qpair *tqpair,
    1163             :                              struct spdk_nvmf_tcp_req *tcp_req,
    1164             :                              nvme_tcp_qpair_xfer_complete_cb cb_fn,
    1165             :                              void *cb_arg)
    1166             : {
    1167           7 :         struct nvme_tcp_pdu *pdu = tcp_req->pdu;
    1168             : 
    1169           7 :         pdu->sock_req.cb_fn = _req_pdu_write_done;
    1170           7 :         pdu->sock_req.cb_arg = tcp_req;
    1171             : 
    1172           7 :         assert(!tcp_req->pdu_in_use);
    1173           7 :         tcp_req->pdu_in_use = true;
    1174             : 
    1175           7 :         nvmf_tcp_qpair_write_pdu(tqpair, pdu, cb_fn, cb_arg);
    1176           7 : }
    1177             : 
    1178             : static int
    1179           1 : nvmf_tcp_qpair_init_mem_resource(struct spdk_nvmf_tcp_qpair *tqpair)
    1180             : {
    1181             :         uint32_t i;
    1182             :         struct spdk_nvmf_transport_opts *opts;
    1183             :         uint32_t in_capsule_data_size;
    1184             : 
    1185           1 :         opts = &tqpair->qpair.transport->opts;
    1186             : 
    1187           1 :         in_capsule_data_size = opts->in_capsule_data_size;
    1188           1 :         if (opts->dif_insert_or_strip) {
    1189           0 :                 in_capsule_data_size = SPDK_BDEV_BUF_SIZE_WITH_MD(in_capsule_data_size);
    1190             :         }
    1191             : 
    1192           1 :         tqpair->resource_count = opts->max_queue_depth;
    1193             : 
    1194           1 :         tqpair->reqs = calloc(tqpair->resource_count, sizeof(*tqpair->reqs));
    1195           1 :         if (!tqpair->reqs) {
    1196           0 :                 SPDK_ERRLOG("Unable to allocate reqs on tqpair=%p\n", tqpair);
    1197           0 :                 return -1;
    1198             :         }
    1199             : 
    1200           1 :         if (in_capsule_data_size) {
    1201           1 :                 tqpair->bufs = spdk_zmalloc(tqpair->resource_count * in_capsule_data_size, 0x1000,
    1202             :                                             NULL, SPDK_ENV_LCORE_ID_ANY,
    1203             :                                             SPDK_MALLOC_DMA);
    1204           1 :                 if (!tqpair->bufs) {
    1205           0 :                         SPDK_ERRLOG("Unable to allocate bufs on tqpair=%p.\n", tqpair);
    1206           0 :                         return -1;
    1207             :                 }
    1208             :         }
    1209             :         /* prepare memory space for receiving pdus and tcp_req */
    1210             :         /* Add additional 1 member, which will be used for mgmt_pdu owned by the tqpair */
    1211           1 :         tqpair->pdus = spdk_dma_zmalloc((2 * tqpair->resource_count + 1) * sizeof(*tqpair->pdus), 0x1000,
    1212             :                                         NULL);
    1213           1 :         if (!tqpair->pdus) {
    1214           0 :                 SPDK_ERRLOG("Unable to allocate pdu pool on tqpair =%p.\n", tqpair);
    1215           0 :                 return -1;
    1216             :         }
    1217             : 
    1218         129 :         for (i = 0; i < tqpair->resource_count; i++) {
    1219         128 :                 struct spdk_nvmf_tcp_req *tcp_req = &tqpair->reqs[i];
    1220             : 
    1221         128 :                 tcp_req->ttag = i + 1;
    1222         128 :                 tcp_req->req.qpair = &tqpair->qpair;
    1223             : 
    1224         128 :                 tcp_req->pdu = &tqpair->pdus[i];
    1225         128 :                 tcp_req->pdu->qpair = tqpair;
    1226             : 
    1227             :                 /* Set up memory to receive commands */
    1228         128 :                 if (tqpair->bufs) {
    1229         128 :                         tcp_req->buf = (void *)((uintptr_t)tqpair->bufs + (i * in_capsule_data_size));
    1230             :                 }
    1231             : 
    1232             :                 /* Set the cmdn and rsp */
    1233         128 :                 tcp_req->req.rsp = (union nvmf_c2h_msg *)&tcp_req->rsp;
    1234         128 :                 tcp_req->req.cmd = (union nvmf_h2c_msg *)&tcp_req->cmd;
    1235             : 
    1236         128 :                 tcp_req->req.stripped_data = NULL;
    1237             : 
    1238             :                 /* Initialize request state to FREE */
    1239         128 :                 tcp_req->state = TCP_REQUEST_STATE_FREE;
    1240         128 :                 TAILQ_INSERT_TAIL(&tqpair->tcp_req_free_queue, tcp_req, state_link);
    1241         128 :                 tqpair->state_cntr[TCP_REQUEST_STATE_FREE]++;
    1242             :         }
    1243             : 
    1244         129 :         for (; i < 2 * tqpair->resource_count; i++) {
    1245         128 :                 struct nvme_tcp_pdu *pdu = &tqpair->pdus[i];
    1246             : 
    1247         128 :                 pdu->qpair = tqpair;
    1248         128 :                 SLIST_INSERT_HEAD(&tqpair->tcp_pdu_free_queue, pdu, slist);
    1249             :         }
    1250             : 
    1251           1 :         tqpair->mgmt_pdu = &tqpair->pdus[i];
    1252           1 :         tqpair->mgmt_pdu->qpair = tqpair;
    1253           1 :         tqpair->pdu_in_progress = SLIST_FIRST(&tqpair->tcp_pdu_free_queue);
    1254           1 :         SLIST_REMOVE_HEAD(&tqpair->tcp_pdu_free_queue, slist);
    1255           1 :         tqpair->tcp_pdu_working_count = 1;
    1256             : 
    1257           1 :         tqpair->recv_buf_size = (in_capsule_data_size + sizeof(struct spdk_nvme_tcp_cmd) + 2 *
    1258             :                                  SPDK_NVME_TCP_DIGEST_LEN) * SPDK_NVMF_TCP_RECV_BUF_SIZE_FACTOR;
    1259             : 
    1260           1 :         return 0;
    1261             : }
    1262             : 
    1263             : static int
    1264           1 : nvmf_tcp_qpair_init(struct spdk_nvmf_qpair *qpair)
    1265             : {
    1266             :         struct spdk_nvmf_tcp_qpair *tqpair;
    1267             : 
    1268           1 :         tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
    1269             : 
    1270           1 :         SPDK_DEBUGLOG(nvmf_tcp, "New TCP Connection: %p\n", qpair);
    1271             : 
    1272           1 :         spdk_trace_record(TRACE_TCP_QP_CREATE, 0, 0, (uintptr_t)tqpair);
    1273             : 
    1274             :         /* Initialise request state queues of the qpair */
    1275           1 :         TAILQ_INIT(&tqpair->tcp_req_free_queue);
    1276           1 :         TAILQ_INIT(&tqpair->tcp_req_working_queue);
    1277           1 :         SLIST_INIT(&tqpair->tcp_pdu_free_queue);
    1278             : 
    1279           1 :         tqpair->host_hdgst_enable = true;
    1280           1 :         tqpair->host_ddgst_enable = true;
    1281             : 
    1282           1 :         return 0;
    1283             : }
    1284             : 
    1285             : static int
    1286           0 : nvmf_tcp_qpair_sock_init(struct spdk_nvmf_tcp_qpair *tqpair)
    1287             : {
    1288             :         int rc;
    1289             : 
    1290           0 :         spdk_trace_record(TRACE_TCP_QP_SOCK_INIT, 0, 0, (uintptr_t)tqpair);
    1291             : 
    1292             :         /* set low water mark */
    1293           0 :         rc = spdk_sock_set_recvlowat(tqpair->sock, 1);
    1294           0 :         if (rc != 0) {
    1295           0 :                 SPDK_ERRLOG("spdk_sock_set_recvlowat() failed\n");
    1296           0 :                 return rc;
    1297             :         }
    1298             : 
    1299           0 :         return 0;
    1300             : }
    1301             : 
    1302             : static void
    1303           0 : nvmf_tcp_handle_connect(struct spdk_nvmf_transport *transport,
    1304             :                         struct spdk_nvmf_tcp_port *port,
    1305             :                         struct spdk_sock *sock)
    1306             : {
    1307             :         struct spdk_nvmf_tcp_qpair *tqpair;
    1308             :         int rc;
    1309             : 
    1310           0 :         SPDK_DEBUGLOG(nvmf_tcp, "New connection accepted on %s port %s\n",
    1311             :                       port->trid->traddr, port->trid->trsvcid);
    1312             : 
    1313           0 :         tqpair = calloc(1, sizeof(struct spdk_nvmf_tcp_qpair));
    1314           0 :         if (tqpair == NULL) {
    1315           0 :                 SPDK_ERRLOG("Could not allocate new connection.\n");
    1316           0 :                 spdk_sock_close(&sock);
    1317           0 :                 return;
    1318             :         }
    1319             : 
    1320           0 :         tqpair->sock = sock;
    1321           0 :         tqpair->state_cntr[TCP_REQUEST_STATE_FREE] = 0;
    1322           0 :         tqpair->port = port;
    1323           0 :         tqpair->qpair.transport = transport;
    1324             : 
    1325           0 :         rc = spdk_sock_getaddr(tqpair->sock, tqpair->target_addr,
    1326             :                                sizeof(tqpair->target_addr), &tqpair->target_port,
    1327           0 :                                tqpair->initiator_addr, sizeof(tqpair->initiator_addr),
    1328             :                                &tqpair->initiator_port);
    1329           0 :         if (rc < 0) {
    1330           0 :                 SPDK_ERRLOG("spdk_sock_getaddr() failed of tqpair=%p\n", tqpair);
    1331           0 :                 nvmf_tcp_qpair_destroy(tqpair);
    1332           0 :                 return;
    1333             :         }
    1334             : 
    1335           0 :         spdk_nvmf_tgt_new_qpair(transport->tgt, &tqpair->qpair);
    1336             : }
    1337             : 
    1338             : static uint32_t
    1339           0 : nvmf_tcp_port_accept(struct spdk_nvmf_transport *transport, struct spdk_nvmf_tcp_port *port)
    1340             : {
    1341             :         struct spdk_sock *sock;
    1342           0 :         uint32_t count = 0;
    1343             :         int i;
    1344             : 
    1345           0 :         for (i = 0; i < NVMF_TCP_MAX_ACCEPT_SOCK_ONE_TIME; i++) {
    1346           0 :                 sock = spdk_sock_accept(port->listen_sock);
    1347           0 :                 if (sock == NULL) {
    1348           0 :                         break;
    1349             :                 }
    1350           0 :                 count++;
    1351           0 :                 nvmf_tcp_handle_connect(transport, port, sock);
    1352             :         }
    1353             : 
    1354           0 :         return count;
    1355             : }
    1356             : 
    1357             : static int
    1358           0 : nvmf_tcp_accept(void *ctx)
    1359             : {
    1360           0 :         struct spdk_nvmf_transport *transport = ctx;
    1361             :         struct spdk_nvmf_tcp_transport *ttransport;
    1362             :         struct spdk_nvmf_tcp_port *port;
    1363           0 :         uint32_t count = 0;
    1364             : 
    1365           0 :         ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
    1366             : 
    1367           0 :         TAILQ_FOREACH(port, &ttransport->ports, link) {
    1368           0 :                 count += nvmf_tcp_port_accept(transport, port);
    1369             :         }
    1370             : 
    1371           0 :         return count > 0 ? SPDK_POLLER_BUSY : SPDK_POLLER_IDLE;
    1372             : }
    1373             : 
    1374             : static void
    1375           0 : nvmf_tcp_discover(struct spdk_nvmf_transport *transport,
    1376             :                   struct spdk_nvme_transport_id *trid,
    1377             :                   struct spdk_nvmf_discovery_log_page_entry *entry)
    1378             : {
    1379             :         struct spdk_nvmf_tcp_port *port;
    1380             :         struct spdk_nvmf_tcp_transport *ttransport;
    1381             : 
    1382           0 :         entry->trtype = SPDK_NVMF_TRTYPE_TCP;
    1383           0 :         entry->adrfam = trid->adrfam;
    1384             : 
    1385           0 :         spdk_strcpy_pad(entry->trsvcid, trid->trsvcid, sizeof(entry->trsvcid), ' ');
    1386           0 :         spdk_strcpy_pad(entry->traddr, trid->traddr, sizeof(entry->traddr), ' ');
    1387             : 
    1388           0 :         ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
    1389           0 :         port = nvmf_tcp_find_port(ttransport, trid);
    1390             : 
    1391           0 :         assert(port != NULL);
    1392             : 
    1393           0 :         if (strcmp(spdk_sock_get_impl_name(port->listen_sock), "ssl") == 0) {
    1394           0 :                 entry->treq.secure_channel = SPDK_NVMF_TREQ_SECURE_CHANNEL_REQUIRED;
    1395           0 :                 entry->tsas.tcp.sectype = SPDK_NVME_TCP_SECURITY_TLS_1_3;
    1396             :         } else {
    1397           0 :                 entry->treq.secure_channel = SPDK_NVMF_TREQ_SECURE_CHANNEL_NOT_REQUIRED;
    1398           0 :                 entry->tsas.tcp.sectype = SPDK_NVME_TCP_SECURITY_NONE;
    1399             :         }
    1400           0 : }
    1401             : 
    1402             : static struct spdk_nvmf_tcp_control_msg_list *
    1403           1 : nvmf_tcp_control_msg_list_create(uint16_t num_messages)
    1404             : {
    1405             :         struct spdk_nvmf_tcp_control_msg_list *list;
    1406             :         struct spdk_nvmf_tcp_control_msg *msg;
    1407             :         uint16_t i;
    1408             : 
    1409           1 :         list = calloc(1, sizeof(*list));
    1410           1 :         if (!list) {
    1411           0 :                 SPDK_ERRLOG("Failed to allocate memory for list structure\n");
    1412           0 :                 return NULL;
    1413             :         }
    1414             : 
    1415           1 :         list->msg_buf = spdk_zmalloc(num_messages * SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE,
    1416             :                                      NVMF_DATA_BUFFER_ALIGNMENT, NULL, SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
    1417           1 :         if (!list->msg_buf) {
    1418           0 :                 SPDK_ERRLOG("Failed to allocate memory for control message buffers\n");
    1419           0 :                 free(list);
    1420           0 :                 return NULL;
    1421             :         }
    1422             : 
    1423           1 :         STAILQ_INIT(&list->free_msgs);
    1424             : 
    1425          33 :         for (i = 0; i < num_messages; i++) {
    1426          32 :                 msg = (struct spdk_nvmf_tcp_control_msg *)((char *)list->msg_buf + i *
    1427             :                                 SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE);
    1428          32 :                 STAILQ_INSERT_TAIL(&list->free_msgs, msg, link);
    1429             :         }
    1430             : 
    1431           1 :         return list;
    1432             : }
    1433             : 
    1434             : static void
    1435           1 : nvmf_tcp_control_msg_list_free(struct spdk_nvmf_tcp_control_msg_list *list)
    1436             : {
    1437           1 :         if (!list) {
    1438           0 :                 return;
    1439             :         }
    1440             : 
    1441           1 :         spdk_free(list->msg_buf);
    1442           1 :         free(list);
    1443             : }
    1444             : 
    1445             : static struct spdk_nvmf_transport_poll_group *
    1446           1 : nvmf_tcp_poll_group_create(struct spdk_nvmf_transport *transport,
    1447             :                            struct spdk_nvmf_poll_group *group)
    1448             : {
    1449             :         struct spdk_nvmf_tcp_transport  *ttransport;
    1450             :         struct spdk_nvmf_tcp_poll_group *tgroup;
    1451             : 
    1452           1 :         tgroup = calloc(1, sizeof(*tgroup));
    1453           1 :         if (!tgroup) {
    1454           0 :                 return NULL;
    1455             :         }
    1456             : 
    1457           1 :         tgroup->sock_group = spdk_sock_group_create(&tgroup->group);
    1458           1 :         if (!tgroup->sock_group) {
    1459           0 :                 goto cleanup;
    1460             :         }
    1461             : 
    1462           1 :         TAILQ_INIT(&tgroup->qpairs);
    1463           1 :         TAILQ_INIT(&tgroup->await_req);
    1464             : 
    1465           1 :         ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
    1466             : 
    1467           1 :         if (transport->opts.in_capsule_data_size < SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE) {
    1468           1 :                 SPDK_DEBUGLOG(nvmf_tcp, "ICD %u is less than min required for admin/fabric commands (%u). "
    1469             :                               "Creating control messages list\n", transport->opts.in_capsule_data_size,
    1470             :                               SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE);
    1471           1 :                 tgroup->control_msg_list = nvmf_tcp_control_msg_list_create(ttransport->tcp_opts.control_msg_num);
    1472           1 :                 if (!tgroup->control_msg_list) {
    1473           0 :                         goto cleanup;
    1474             :                 }
    1475             :         }
    1476             : 
    1477           1 :         tgroup->accel_channel = spdk_accel_get_io_channel();
    1478           1 :         if (spdk_unlikely(!tgroup->accel_channel)) {
    1479           0 :                 SPDK_ERRLOG("Cannot create accel_channel for tgroup=%p\n", tgroup);
    1480           0 :                 goto cleanup;
    1481             :         }
    1482             : 
    1483           1 :         TAILQ_INSERT_TAIL(&ttransport->poll_groups, tgroup, link);
    1484           1 :         if (ttransport->next_pg == NULL) {
    1485           1 :                 ttransport->next_pg = tgroup;
    1486             :         }
    1487             : 
    1488           1 :         return &tgroup->group;
    1489             : 
    1490           0 : cleanup:
    1491           0 :         nvmf_tcp_poll_group_destroy(&tgroup->group);
    1492           0 :         return NULL;
    1493             : }
    1494             : 
    1495             : static struct spdk_nvmf_transport_poll_group *
    1496           0 : nvmf_tcp_get_optimal_poll_group(struct spdk_nvmf_qpair *qpair)
    1497             : {
    1498             :         struct spdk_nvmf_tcp_transport *ttransport;
    1499             :         struct spdk_nvmf_tcp_poll_group **pg;
    1500             :         struct spdk_nvmf_tcp_qpair *tqpair;
    1501           0 :         struct spdk_sock_group *group = NULL, *hint = NULL;
    1502             :         int rc;
    1503             : 
    1504           0 :         ttransport = SPDK_CONTAINEROF(qpair->transport, struct spdk_nvmf_tcp_transport, transport);
    1505             : 
    1506           0 :         if (TAILQ_EMPTY(&ttransport->poll_groups)) {
    1507           0 :                 return NULL;
    1508             :         }
    1509             : 
    1510           0 :         pg = &ttransport->next_pg;
    1511           0 :         assert(*pg != NULL);
    1512           0 :         hint = (*pg)->sock_group;
    1513             : 
    1514           0 :         tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
    1515           0 :         rc = spdk_sock_get_optimal_sock_group(tqpair->sock, &group, hint);
    1516           0 :         if (rc != 0) {
    1517           0 :                 return NULL;
    1518           0 :         } else if (group != NULL) {
    1519             :                 /* Optimal poll group was found */
    1520           0 :                 return spdk_sock_group_get_ctx(group);
    1521             :         }
    1522             : 
    1523             :         /* The hint was used for optimal poll group, advance next_pg. */
    1524           0 :         *pg = TAILQ_NEXT(*pg, link);
    1525           0 :         if (*pg == NULL) {
    1526           0 :                 *pg = TAILQ_FIRST(&ttransport->poll_groups);
    1527             :         }
    1528             : 
    1529           0 :         return spdk_sock_group_get_ctx(hint);
    1530             : }
    1531             : 
    1532             : static void
    1533           1 : nvmf_tcp_poll_group_destroy(struct spdk_nvmf_transport_poll_group *group)
    1534             : {
    1535             :         struct spdk_nvmf_tcp_poll_group *tgroup, *next_tgroup;
    1536             :         struct spdk_nvmf_tcp_transport *ttransport;
    1537             : 
    1538           1 :         tgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_tcp_poll_group, group);
    1539           1 :         spdk_sock_group_close(&tgroup->sock_group);
    1540           1 :         if (tgroup->control_msg_list) {
    1541           1 :                 nvmf_tcp_control_msg_list_free(tgroup->control_msg_list);
    1542             :         }
    1543             : 
    1544           1 :         if (tgroup->accel_channel) {
    1545           1 :                 spdk_put_io_channel(tgroup->accel_channel);
    1546             :         }
    1547             : 
    1548           1 :         if (tgroup->group.transport == NULL) {
    1549             :                 /* Transport can be NULL when nvmf_tcp_poll_group_create()
    1550             :                  * calls this function directly in a failure path. */
    1551           0 :                 free(tgroup);
    1552           0 :                 return;
    1553             :         }
    1554             : 
    1555           1 :         ttransport = SPDK_CONTAINEROF(tgroup->group.transport, struct spdk_nvmf_tcp_transport, transport);
    1556             : 
    1557           1 :         next_tgroup = TAILQ_NEXT(tgroup, link);
    1558           1 :         TAILQ_REMOVE(&ttransport->poll_groups, tgroup, link);
    1559           1 :         if (next_tgroup == NULL) {
    1560           1 :                 next_tgroup = TAILQ_FIRST(&ttransport->poll_groups);
    1561             :         }
    1562           1 :         if (ttransport->next_pg == tgroup) {
    1563           1 :                 ttransport->next_pg = next_tgroup;
    1564             :         }
    1565             : 
    1566           1 :         free(tgroup);
    1567             : }
    1568             : 
    1569             : static void
    1570          36 : nvmf_tcp_qpair_set_recv_state(struct spdk_nvmf_tcp_qpair *tqpair,
    1571             :                               enum nvme_tcp_pdu_recv_state state)
    1572             : {
    1573          36 :         if (tqpair->recv_state == state) {
    1574          18 :                 SPDK_ERRLOG("The recv state of tqpair=%p is same with the state(%d) to be set\n",
    1575             :                             tqpair, state);
    1576          18 :                 return;
    1577             :         }
    1578             : 
    1579          18 :         if (spdk_unlikely(state == NVME_TCP_PDU_RECV_STATE_QUIESCING)) {
    1580          13 :                 if (tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_CH && tqpair->pdu_in_progress) {
    1581          10 :                         SLIST_INSERT_HEAD(&tqpair->tcp_pdu_free_queue, tqpair->pdu_in_progress, slist);
    1582          10 :                         tqpair->tcp_pdu_working_count--;
    1583             :                 }
    1584             :         }
    1585             : 
    1586          18 :         if (spdk_unlikely(state == NVME_TCP_PDU_RECV_STATE_ERROR)) {
    1587           0 :                 assert(tqpair->tcp_pdu_working_count == 0);
    1588             :         }
    1589             : 
    1590          18 :         if (tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_REQ) {
    1591             :                 /* When leaving the await req state, move the qpair to the main list */
    1592           0 :                 TAILQ_REMOVE(&tqpair->group->await_req, tqpair, link);
    1593           0 :                 TAILQ_INSERT_TAIL(&tqpair->group->qpairs, tqpair, link);
    1594          18 :         } else if (state == NVME_TCP_PDU_RECV_STATE_AWAIT_REQ) {
    1595           0 :                 TAILQ_REMOVE(&tqpair->group->qpairs, tqpair, link);
    1596           0 :                 TAILQ_INSERT_TAIL(&tqpair->group->await_req, tqpair, link);
    1597             :         }
    1598             : 
    1599          18 :         SPDK_DEBUGLOG(nvmf_tcp, "tqpair(%p) recv state=%d\n", tqpair, state);
    1600          18 :         tqpair->recv_state = state;
    1601             : 
    1602          18 :         spdk_trace_record(TRACE_TCP_QP_RCV_STATE_CHANGE, tqpair->qpair.qid, 0, (uintptr_t)tqpair,
    1603             :                           tqpair->recv_state);
    1604             : }
    1605             : 
    1606             : static int
    1607           0 : nvmf_tcp_qpair_handle_timeout(void *ctx)
    1608             : {
    1609           0 :         struct spdk_nvmf_tcp_qpair *tqpair = ctx;
    1610             : 
    1611           0 :         assert(tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_ERROR);
    1612             : 
    1613           0 :         SPDK_ERRLOG("No pdu coming for tqpair=%p within %d seconds\n", tqpair,
    1614             :                     SPDK_NVME_TCP_QPAIR_EXIT_TIMEOUT);
    1615             : 
    1616           0 :         nvmf_tcp_qpair_disconnect(tqpair);
    1617           0 :         return SPDK_POLLER_BUSY;
    1618             : }
    1619             : 
    1620             : static void
    1621           0 : nvmf_tcp_send_c2h_term_req_complete(void *cb_arg)
    1622             : {
    1623           0 :         struct spdk_nvmf_tcp_qpair *tqpair = (struct spdk_nvmf_tcp_qpair *)cb_arg;
    1624             : 
    1625           0 :         if (!tqpair->timeout_poller) {
    1626           0 :                 tqpair->timeout_poller = SPDK_POLLER_REGISTER(nvmf_tcp_qpair_handle_timeout, tqpair,
    1627             :                                          SPDK_NVME_TCP_QPAIR_EXIT_TIMEOUT * 1000000);
    1628             :         }
    1629           0 : }
    1630             : 
    1631             : static void
    1632          15 : nvmf_tcp_send_c2h_term_req(struct spdk_nvmf_tcp_qpair *tqpair, struct nvme_tcp_pdu *pdu,
    1633             :                            enum spdk_nvme_tcp_term_req_fes fes, uint32_t error_offset)
    1634             : {
    1635             :         struct nvme_tcp_pdu *rsp_pdu;
    1636             :         struct spdk_nvme_tcp_term_req_hdr *c2h_term_req;
    1637          15 :         uint32_t c2h_term_req_hdr_len = sizeof(*c2h_term_req);
    1638             :         uint32_t copy_len;
    1639             : 
    1640          15 :         rsp_pdu = tqpair->mgmt_pdu;
    1641             : 
    1642          15 :         c2h_term_req = &rsp_pdu->hdr.term_req;
    1643          15 :         c2h_term_req->common.pdu_type = SPDK_NVME_TCP_PDU_TYPE_C2H_TERM_REQ;
    1644          15 :         c2h_term_req->common.hlen = c2h_term_req_hdr_len;
    1645          15 :         c2h_term_req->fes = fes;
    1646             : 
    1647          15 :         if ((fes == SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD) ||
    1648             :             (fes == SPDK_NVME_TCP_TERM_REQ_FES_INVALID_DATA_UNSUPPORTED_PARAMETER)) {
    1649          12 :                 DSET32(&c2h_term_req->fei, error_offset);
    1650             :         }
    1651             : 
    1652          15 :         copy_len = spdk_min(pdu->hdr.common.hlen, SPDK_NVME_TCP_TERM_REQ_ERROR_DATA_MAX_SIZE);
    1653             : 
    1654             :         /* Copy the error info into the buffer */
    1655          15 :         memcpy((uint8_t *)rsp_pdu->hdr.raw + c2h_term_req_hdr_len, pdu->hdr.raw, copy_len);
    1656          15 :         nvme_tcp_pdu_set_data(rsp_pdu, (uint8_t *)rsp_pdu->hdr.raw + c2h_term_req_hdr_len, copy_len);
    1657             : 
    1658             :         /* Contain the header of the wrong received pdu */
    1659          15 :         c2h_term_req->common.plen = c2h_term_req->common.hlen + copy_len;
    1660          15 :         tqpair->wait_terminate = true;
    1661          15 :         nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_QUIESCING);
    1662          15 :         nvmf_tcp_qpair_write_mgmt_pdu(tqpair, nvmf_tcp_send_c2h_term_req_complete, tqpair);
    1663          15 : }
    1664             : 
    1665             : static void
    1666           1 : nvmf_tcp_capsule_cmd_hdr_handle(struct spdk_nvmf_tcp_transport *ttransport,
    1667             :                                 struct spdk_nvmf_tcp_qpair *tqpair,
    1668             :                                 struct nvme_tcp_pdu *pdu)
    1669             : {
    1670             :         struct spdk_nvmf_tcp_req *tcp_req;
    1671             : 
    1672           1 :         assert(pdu->psh_valid_bytes == pdu->psh_len);
    1673           1 :         assert(pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_CAPSULE_CMD);
    1674             : 
    1675           1 :         tcp_req = nvmf_tcp_req_get(tqpair);
    1676           1 :         if (!tcp_req) {
    1677             :                 /* Directly return and make the allocation retry again.  This can happen if we're
    1678             :                  * using asynchronous writes to send the response to the host or when releasing
    1679             :                  * zero-copy buffers after a response has been sent.  In both cases, the host might
    1680             :                  * receive the response before we've finished processing the request and is free to
    1681             :                  * send another one.
    1682             :                  */
    1683           0 :                 if (tqpair->state_cntr[TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST] > 0 ||
    1684           0 :                     tqpair->state_cntr[TCP_REQUEST_STATE_AWAITING_ZCOPY_RELEASE] > 0) {
    1685           0 :                         return;
    1686             :                 }
    1687             : 
    1688             :                 /* The host sent more commands than the maximum queue depth. */
    1689           0 :                 SPDK_ERRLOG("Cannot allocate tcp_req on tqpair=%p\n", tqpair);
    1690           0 :                 nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_QUIESCING);
    1691           0 :                 return;
    1692             :         }
    1693             : 
    1694           1 :         pdu->req = tcp_req;
    1695           1 :         assert(tcp_req->state == TCP_REQUEST_STATE_NEW);
    1696           1 :         nvmf_tcp_req_process(ttransport, tcp_req);
    1697             : }
    1698             : 
    1699             : static void
    1700           0 : nvmf_tcp_capsule_cmd_payload_handle(struct spdk_nvmf_tcp_transport *ttransport,
    1701             :                                     struct spdk_nvmf_tcp_qpair *tqpair,
    1702             :                                     struct nvme_tcp_pdu *pdu)
    1703             : {
    1704             :         struct spdk_nvmf_tcp_req *tcp_req;
    1705             :         struct spdk_nvme_tcp_cmd *capsule_cmd;
    1706           0 :         uint32_t error_offset = 0;
    1707             :         enum spdk_nvme_tcp_term_req_fes fes;
    1708             :         struct spdk_nvme_cpl *rsp;
    1709             : 
    1710           0 :         capsule_cmd = &pdu->hdr.capsule_cmd;
    1711           0 :         tcp_req = pdu->req;
    1712           0 :         assert(tcp_req != NULL);
    1713             : 
    1714             :         /* Zero-copy requests don't support ICD */
    1715           0 :         assert(!spdk_nvmf_request_using_zcopy(&tcp_req->req));
    1716             : 
    1717           0 :         if (capsule_cmd->common.pdo > SPDK_NVME_TCP_PDU_PDO_MAX_OFFSET) {
    1718           0 :                 SPDK_ERRLOG("Expected ICReq capsule_cmd pdu offset <= %d, got %c\n",
    1719             :                             SPDK_NVME_TCP_PDU_PDO_MAX_OFFSET, capsule_cmd->common.pdo);
    1720           0 :                 fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
    1721           0 :                 error_offset = offsetof(struct spdk_nvme_tcp_common_pdu_hdr, pdo);
    1722           0 :                 goto err;
    1723             :         }
    1724             : 
    1725           0 :         rsp = &tcp_req->req.rsp->nvme_cpl;
    1726           0 :         if (spdk_unlikely(rsp->status.sc == SPDK_NVME_SC_COMMAND_TRANSIENT_TRANSPORT_ERROR)) {
    1727           0 :                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_COMPLETE);
    1728             :         } else {
    1729           0 :                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
    1730             :         }
    1731             : 
    1732           0 :         nvmf_tcp_req_process(ttransport, tcp_req);
    1733             : 
    1734           0 :         return;
    1735           0 : err:
    1736           0 :         nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
    1737             : }
    1738             : 
    1739             : static void
    1740           1 : nvmf_tcp_h2c_data_hdr_handle(struct spdk_nvmf_tcp_transport *ttransport,
    1741             :                              struct spdk_nvmf_tcp_qpair *tqpair,
    1742             :                              struct nvme_tcp_pdu *pdu)
    1743             : {
    1744             :         struct spdk_nvmf_tcp_req *tcp_req;
    1745           1 :         uint32_t error_offset = 0;
    1746           1 :         enum spdk_nvme_tcp_term_req_fes fes = 0;
    1747             :         struct spdk_nvme_tcp_h2c_data_hdr *h2c_data;
    1748             : 
    1749           1 :         h2c_data = &pdu->hdr.h2c_data;
    1750             : 
    1751           1 :         SPDK_DEBUGLOG(nvmf_tcp, "tqpair=%p, r2t_info: datao=%u, datal=%u, cccid=%u, ttag=%u\n",
    1752             :                       tqpair, h2c_data->datao, h2c_data->datal, h2c_data->cccid, h2c_data->ttag);
    1753             : 
    1754           1 :         if (h2c_data->ttag > tqpair->resource_count) {
    1755           0 :                 SPDK_DEBUGLOG(nvmf_tcp, "ttag %u is larger than allowed %u.\n", h2c_data->ttag,
    1756             :                               tqpair->resource_count);
    1757           0 :                 fes = SPDK_NVME_TCP_TERM_REQ_FES_PDU_SEQUENCE_ERROR;
    1758           0 :                 error_offset = offsetof(struct spdk_nvme_tcp_h2c_data_hdr, ttag);
    1759           0 :                 goto err;
    1760             :         }
    1761             : 
    1762           1 :         tcp_req = &tqpair->reqs[h2c_data->ttag - 1];
    1763             : 
    1764           1 :         if (spdk_unlikely(tcp_req->state != TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER &&
    1765             :                           tcp_req->state != TCP_REQUEST_STATE_AWAITING_R2T_ACK)) {
    1766           0 :                 SPDK_DEBUGLOG(nvmf_tcp, "tcp_req(%p), tqpair=%p, has error state in %d\n", tcp_req, tqpair,
    1767             :                               tcp_req->state);
    1768           0 :                 fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
    1769           0 :                 error_offset = offsetof(struct spdk_nvme_tcp_h2c_data_hdr, ttag);
    1770           0 :                 goto err;
    1771             :         }
    1772             : 
    1773           1 :         if (spdk_unlikely(tcp_req->req.cmd->nvme_cmd.cid != h2c_data->cccid)) {
    1774           0 :                 SPDK_DEBUGLOG(nvmf_tcp, "tcp_req(%p), tqpair=%p, expected %u but %u for cccid.\n", tcp_req, tqpair,
    1775             :                               tcp_req->req.cmd->nvme_cmd.cid, h2c_data->cccid);
    1776           0 :                 fes = SPDK_NVME_TCP_TERM_REQ_FES_PDU_SEQUENCE_ERROR;
    1777           0 :                 error_offset = offsetof(struct spdk_nvme_tcp_h2c_data_hdr, cccid);
    1778           0 :                 goto err;
    1779             :         }
    1780             : 
    1781           1 :         if (tcp_req->h2c_offset != h2c_data->datao) {
    1782           0 :                 SPDK_DEBUGLOG(nvmf_tcp,
    1783             :                               "tcp_req(%p), tqpair=%p, expected data offset %u, but data offset is %u\n",
    1784             :                               tcp_req, tqpair, tcp_req->h2c_offset, h2c_data->datao);
    1785           0 :                 fes = SPDK_NVME_TCP_TERM_REQ_FES_DATA_TRANSFER_OUT_OF_RANGE;
    1786           0 :                 goto err;
    1787             :         }
    1788             : 
    1789           1 :         if ((h2c_data->datao + h2c_data->datal) > tcp_req->req.length) {
    1790           0 :                 SPDK_DEBUGLOG(nvmf_tcp,
    1791             :                               "tcp_req(%p), tqpair=%p,  (datao=%u + datal=%u) exceeds requested length=%u\n",
    1792             :                               tcp_req, tqpair, h2c_data->datao, h2c_data->datal, tcp_req->req.length);
    1793           0 :                 fes = SPDK_NVME_TCP_TERM_REQ_FES_DATA_TRANSFER_OUT_OF_RANGE;
    1794           0 :                 goto err;
    1795             :         }
    1796             : 
    1797           1 :         pdu->req = tcp_req;
    1798             : 
    1799           1 :         if (spdk_unlikely(tcp_req->req.dif_enabled)) {
    1800           0 :                 pdu->dif_ctx = &tcp_req->req.dif.dif_ctx;
    1801             :         }
    1802             : 
    1803           1 :         nvme_tcp_pdu_set_data_buf(pdu, tcp_req->req.iov, tcp_req->req.iovcnt,
    1804             :                                   h2c_data->datao, h2c_data->datal);
    1805           1 :         nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD);
    1806           1 :         return;
    1807             : 
    1808           0 : err:
    1809           0 :         nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
    1810             : }
    1811             : 
    1812             : static void
    1813           3 : nvmf_tcp_send_capsule_resp_pdu(struct spdk_nvmf_tcp_req *tcp_req,
    1814             :                                struct spdk_nvmf_tcp_qpair *tqpair)
    1815             : {
    1816             :         struct nvme_tcp_pdu *rsp_pdu;
    1817             :         struct spdk_nvme_tcp_rsp *capsule_resp;
    1818             : 
    1819           3 :         SPDK_DEBUGLOG(nvmf_tcp, "enter, tqpair=%p\n", tqpair);
    1820             : 
    1821           3 :         rsp_pdu = nvmf_tcp_req_pdu_init(tcp_req);
    1822           3 :         assert(rsp_pdu != NULL);
    1823             : 
    1824           3 :         capsule_resp = &rsp_pdu->hdr.capsule_resp;
    1825           3 :         capsule_resp->common.pdu_type = SPDK_NVME_TCP_PDU_TYPE_CAPSULE_RESP;
    1826           3 :         capsule_resp->common.plen = capsule_resp->common.hlen = sizeof(*capsule_resp);
    1827           3 :         capsule_resp->rccqe = tcp_req->req.rsp->nvme_cpl;
    1828           3 :         if (tqpair->host_hdgst_enable) {
    1829           1 :                 capsule_resp->common.flags |= SPDK_NVME_TCP_CH_FLAGS_HDGSTF;
    1830           1 :                 capsule_resp->common.plen += SPDK_NVME_TCP_DIGEST_LEN;
    1831             :         }
    1832             : 
    1833           3 :         nvmf_tcp_qpair_write_req_pdu(tqpair, tcp_req, nvmf_tcp_request_free, tcp_req);
    1834           3 : }
    1835             : 
    1836             : static void
    1837           0 : nvmf_tcp_pdu_c2h_data_complete(void *cb_arg)
    1838             : {
    1839           0 :         struct spdk_nvmf_tcp_req *tcp_req = cb_arg;
    1840           0 :         struct spdk_nvmf_tcp_qpair *tqpair = SPDK_CONTAINEROF(tcp_req->req.qpair,
    1841             :                                              struct spdk_nvmf_tcp_qpair, qpair);
    1842             : 
    1843           0 :         assert(tqpair != NULL);
    1844             : 
    1845           0 :         if (spdk_unlikely(tcp_req->pdu->rw_offset < tcp_req->req.length)) {
    1846           0 :                 SPDK_DEBUGLOG(nvmf_tcp, "sending another C2H part, offset %u length %u\n", tcp_req->pdu->rw_offset,
    1847             :                               tcp_req->req.length);
    1848           0 :                 _nvmf_tcp_send_c2h_data(tqpair, tcp_req);
    1849           0 :                 return;
    1850             :         }
    1851             : 
    1852           0 :         if (tcp_req->pdu->hdr.c2h_data.common.flags & SPDK_NVME_TCP_C2H_DATA_FLAGS_SUCCESS) {
    1853           0 :                 nvmf_tcp_request_free(tcp_req);
    1854             :         } else {
    1855           0 :                 nvmf_tcp_send_capsule_resp_pdu(tcp_req, tqpair);
    1856             :         }
    1857             : }
    1858             : 
    1859             : static void
    1860           0 : nvmf_tcp_r2t_complete(void *cb_arg)
    1861             : {
    1862           0 :         struct spdk_nvmf_tcp_req *tcp_req = cb_arg;
    1863             :         struct spdk_nvmf_tcp_transport *ttransport;
    1864             : 
    1865           0 :         ttransport = SPDK_CONTAINEROF(tcp_req->req.qpair->transport,
    1866             :                                       struct spdk_nvmf_tcp_transport, transport);
    1867             : 
    1868           0 :         nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER);
    1869             : 
    1870           0 :         if (tcp_req->h2c_offset == tcp_req->req.length) {
    1871           0 :                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
    1872           0 :                 nvmf_tcp_req_process(ttransport, tcp_req);
    1873             :         }
    1874           0 : }
    1875             : 
    1876             : static void
    1877           0 : nvmf_tcp_send_r2t_pdu(struct spdk_nvmf_tcp_qpair *tqpair,
    1878             :                       struct spdk_nvmf_tcp_req *tcp_req)
    1879             : {
    1880             :         struct nvme_tcp_pdu *rsp_pdu;
    1881             :         struct spdk_nvme_tcp_r2t_hdr *r2t;
    1882             : 
    1883           0 :         rsp_pdu = nvmf_tcp_req_pdu_init(tcp_req);
    1884           0 :         assert(rsp_pdu != NULL);
    1885             : 
    1886           0 :         r2t = &rsp_pdu->hdr.r2t;
    1887           0 :         r2t->common.pdu_type = SPDK_NVME_TCP_PDU_TYPE_R2T;
    1888           0 :         r2t->common.plen = r2t->common.hlen = sizeof(*r2t);
    1889             : 
    1890           0 :         if (tqpair->host_hdgst_enable) {
    1891           0 :                 r2t->common.flags |= SPDK_NVME_TCP_CH_FLAGS_HDGSTF;
    1892           0 :                 r2t->common.plen += SPDK_NVME_TCP_DIGEST_LEN;
    1893             :         }
    1894             : 
    1895           0 :         r2t->cccid = tcp_req->req.cmd->nvme_cmd.cid;
    1896           0 :         r2t->ttag = tcp_req->ttag;
    1897           0 :         r2t->r2to = tcp_req->h2c_offset;
    1898           0 :         r2t->r2tl = tcp_req->req.length;
    1899             : 
    1900           0 :         nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_AWAITING_R2T_ACK);
    1901             : 
    1902           0 :         SPDK_DEBUGLOG(nvmf_tcp,
    1903             :                       "tcp_req(%p) on tqpair(%p), r2t_info: cccid=%u, ttag=%u, r2to=%u, r2tl=%u\n",
    1904             :                       tcp_req, tqpair, r2t->cccid, r2t->ttag, r2t->r2to, r2t->r2tl);
    1905           0 :         nvmf_tcp_qpair_write_req_pdu(tqpair, tcp_req, nvmf_tcp_r2t_complete, tcp_req);
    1906           0 : }
    1907             : 
    1908             : static void
    1909           0 : nvmf_tcp_h2c_data_payload_handle(struct spdk_nvmf_tcp_transport *ttransport,
    1910             :                                  struct spdk_nvmf_tcp_qpair *tqpair,
    1911             :                                  struct nvme_tcp_pdu *pdu)
    1912             : {
    1913             :         struct spdk_nvmf_tcp_req *tcp_req;
    1914             :         struct spdk_nvme_cpl *rsp;
    1915             : 
    1916           0 :         tcp_req = pdu->req;
    1917           0 :         assert(tcp_req != NULL);
    1918             : 
    1919           0 :         SPDK_DEBUGLOG(nvmf_tcp, "enter\n");
    1920             : 
    1921           0 :         tcp_req->h2c_offset += pdu->data_len;
    1922             : 
    1923             :         /* Wait for all of the data to arrive AND for the initial R2T PDU send to be
    1924             :          * acknowledged before moving on. */
    1925           0 :         if (tcp_req->h2c_offset == tcp_req->req.length &&
    1926           0 :             tcp_req->state == TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER) {
    1927             :                 /* After receiving all the h2c data, we need to check whether there is
    1928             :                  * transient transport error */
    1929           0 :                 rsp = &tcp_req->req.rsp->nvme_cpl;
    1930           0 :                 if (spdk_unlikely(rsp->status.sc == SPDK_NVME_SC_COMMAND_TRANSIENT_TRANSPORT_ERROR)) {
    1931           0 :                         nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_COMPLETE);
    1932             :                 } else {
    1933           0 :                         nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
    1934             :                 }
    1935           0 :                 nvmf_tcp_req_process(ttransport, tcp_req);
    1936             :         }
    1937           0 : }
    1938             : 
    1939             : static void
    1940           0 : nvmf_tcp_h2c_term_req_dump(struct spdk_nvme_tcp_term_req_hdr *h2c_term_req)
    1941             : {
    1942           0 :         SPDK_ERRLOG("Error info of pdu(%p): %s\n", h2c_term_req,
    1943             :                     spdk_nvmf_tcp_term_req_fes_str[h2c_term_req->fes]);
    1944           0 :         if ((h2c_term_req->fes == SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD) ||
    1945           0 :             (h2c_term_req->fes == SPDK_NVME_TCP_TERM_REQ_FES_INVALID_DATA_UNSUPPORTED_PARAMETER)) {
    1946           0 :                 SPDK_DEBUGLOG(nvmf_tcp, "The offset from the start of the PDU header is %u\n",
    1947             :                               DGET32(h2c_term_req->fei));
    1948             :         }
    1949           0 : }
    1950             : 
    1951             : static void
    1952           0 : nvmf_tcp_h2c_term_req_hdr_handle(struct spdk_nvmf_tcp_qpair *tqpair,
    1953             :                                  struct nvme_tcp_pdu *pdu)
    1954             : {
    1955           0 :         struct spdk_nvme_tcp_term_req_hdr *h2c_term_req = &pdu->hdr.term_req;
    1956           0 :         uint32_t error_offset = 0;
    1957             :         enum spdk_nvme_tcp_term_req_fes fes;
    1958             : 
    1959           0 :         if (h2c_term_req->fes > SPDK_NVME_TCP_TERM_REQ_FES_INVALID_DATA_UNSUPPORTED_PARAMETER) {
    1960           0 :                 SPDK_ERRLOG("Fatal Error Status(FES) is unknown for h2c_term_req pdu=%p\n", pdu);
    1961           0 :                 fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
    1962           0 :                 error_offset = offsetof(struct spdk_nvme_tcp_term_req_hdr, fes);
    1963           0 :                 goto end;
    1964             :         }
    1965             : 
    1966             :         /* set the data buffer */
    1967           0 :         nvme_tcp_pdu_set_data(pdu, (uint8_t *)pdu->hdr.raw + h2c_term_req->common.hlen,
    1968           0 :                               h2c_term_req->common.plen - h2c_term_req->common.hlen);
    1969           0 :         nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD);
    1970           0 :         return;
    1971           0 : end:
    1972           0 :         nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
    1973             : }
    1974             : 
    1975             : static void
    1976           0 : nvmf_tcp_h2c_term_req_payload_handle(struct spdk_nvmf_tcp_qpair *tqpair,
    1977             :                                      struct nvme_tcp_pdu *pdu)
    1978             : {
    1979           0 :         struct spdk_nvme_tcp_term_req_hdr *h2c_term_req = &pdu->hdr.term_req;
    1980             : 
    1981           0 :         nvmf_tcp_h2c_term_req_dump(h2c_term_req);
    1982           0 :         nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_QUIESCING);
    1983           0 : }
    1984             : 
    1985             : static void
    1986           0 : _nvmf_tcp_pdu_payload_handle(struct spdk_nvmf_tcp_qpair *tqpair, struct nvme_tcp_pdu *pdu)
    1987             : {
    1988           0 :         struct spdk_nvmf_tcp_transport *ttransport = SPDK_CONTAINEROF(tqpair->qpair.transport,
    1989             :                         struct spdk_nvmf_tcp_transport, transport);
    1990             : 
    1991           0 :         switch (pdu->hdr.common.pdu_type) {
    1992           0 :         case SPDK_NVME_TCP_PDU_TYPE_CAPSULE_CMD:
    1993           0 :                 nvmf_tcp_capsule_cmd_payload_handle(ttransport, tqpair, pdu);
    1994           0 :                 break;
    1995           0 :         case SPDK_NVME_TCP_PDU_TYPE_H2C_DATA:
    1996           0 :                 nvmf_tcp_h2c_data_payload_handle(ttransport, tqpair, pdu);
    1997           0 :                 break;
    1998             : 
    1999           0 :         case SPDK_NVME_TCP_PDU_TYPE_H2C_TERM_REQ:
    2000           0 :                 nvmf_tcp_h2c_term_req_payload_handle(tqpair, pdu);
    2001           0 :                 break;
    2002             : 
    2003           0 :         default:
    2004             :                 /* The code should not go to here */
    2005           0 :                 SPDK_ERRLOG("ERROR pdu type %d\n", pdu->hdr.common.pdu_type);
    2006           0 :                 break;
    2007             :         }
    2008           0 :         SLIST_INSERT_HEAD(&tqpair->tcp_pdu_free_queue, pdu, slist);
    2009           0 :         tqpair->tcp_pdu_working_count--;
    2010           0 : }
    2011             : 
    2012             : static inline void
    2013           1 : nvmf_tcp_req_set_cpl(struct spdk_nvmf_tcp_req *treq, int sct, int sc)
    2014             : {
    2015           1 :         treq->req.rsp->nvme_cpl.status.sct = sct;
    2016           1 :         treq->req.rsp->nvme_cpl.status.sc = sc;
    2017           1 :         treq->req.rsp->nvme_cpl.cid = treq->req.cmd->nvme_cmd.cid;
    2018           1 : }
    2019             : 
    2020             : static void
    2021           0 : data_crc32_calc_done(void *cb_arg, int status)
    2022             : {
    2023           0 :         struct nvme_tcp_pdu *pdu = cb_arg;
    2024           0 :         struct spdk_nvmf_tcp_qpair *tqpair = pdu->qpair;
    2025             : 
    2026             :         /* async crc32 calculation is failed and use direct calculation to check */
    2027           0 :         if (spdk_unlikely(status)) {
    2028           0 :                 SPDK_ERRLOG("Data digest on tqpair=(%p) with pdu=%p failed to be calculated asynchronously\n",
    2029             :                             tqpair, pdu);
    2030           0 :                 pdu->data_digest_crc32 = nvme_tcp_pdu_calc_data_digest(pdu);
    2031             :         }
    2032           0 :         pdu->data_digest_crc32 ^= SPDK_CRC32C_XOR;
    2033           0 :         if (!MATCH_DIGEST_WORD(pdu->data_digest, pdu->data_digest_crc32)) {
    2034           0 :                 SPDK_ERRLOG("Data digest error on tqpair=(%p) with pdu=%p\n", tqpair, pdu);
    2035           0 :                 assert(pdu->req != NULL);
    2036           0 :                 nvmf_tcp_req_set_cpl(pdu->req, SPDK_NVME_SCT_GENERIC,
    2037             :                                      SPDK_NVME_SC_COMMAND_TRANSIENT_TRANSPORT_ERROR);
    2038             :         }
    2039           0 :         _nvmf_tcp_pdu_payload_handle(tqpair, pdu);
    2040           0 : }
    2041             : 
    2042             : static void
    2043           0 : nvmf_tcp_pdu_payload_handle(struct spdk_nvmf_tcp_qpair *tqpair, struct nvme_tcp_pdu *pdu)
    2044             : {
    2045           0 :         int rc = 0;
    2046           0 :         assert(tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD);
    2047           0 :         tqpair->pdu_in_progress = NULL;
    2048           0 :         nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
    2049           0 :         SPDK_DEBUGLOG(nvmf_tcp, "enter\n");
    2050             :         /* check data digest if need */
    2051           0 :         if (pdu->ddgst_enable) {
    2052           0 :                 if (tqpair->qpair.qid != 0 && !pdu->dif_ctx && tqpair->group &&
    2053           0 :                     (pdu->data_len % SPDK_NVME_TCP_DIGEST_ALIGNMENT == 0)) {
    2054           0 :                         rc = spdk_accel_submit_crc32cv(tqpair->group->accel_channel, &pdu->data_digest_crc32, pdu->data_iov,
    2055             :                                                        pdu->data_iovcnt, 0, data_crc32_calc_done, pdu);
    2056           0 :                         if (spdk_likely(rc == 0)) {
    2057           0 :                                 return;
    2058             :                         }
    2059             :                 } else {
    2060           0 :                         pdu->data_digest_crc32 = nvme_tcp_pdu_calc_data_digest(pdu);
    2061             :                 }
    2062           0 :                 data_crc32_calc_done(pdu, rc);
    2063             :         } else {
    2064           0 :                 _nvmf_tcp_pdu_payload_handle(tqpair, pdu);
    2065             :         }
    2066             : }
    2067             : 
    2068             : static void
    2069           0 : nvmf_tcp_send_icresp_complete(void *cb_arg)
    2070             : {
    2071           0 :         struct spdk_nvmf_tcp_qpair *tqpair = cb_arg;
    2072             : 
    2073           0 :         nvmf_tcp_qpair_set_state(tqpair, NVME_TCP_QPAIR_STATE_RUNNING);
    2074           0 : }
    2075             : 
    2076             : static void
    2077           3 : nvmf_tcp_icreq_handle(struct spdk_nvmf_tcp_transport *ttransport,
    2078             :                       struct spdk_nvmf_tcp_qpair *tqpair,
    2079             :                       struct nvme_tcp_pdu *pdu)
    2080             : {
    2081           3 :         struct spdk_nvme_tcp_ic_req *ic_req = &pdu->hdr.ic_req;
    2082             :         struct nvme_tcp_pdu *rsp_pdu;
    2083             :         struct spdk_nvme_tcp_ic_resp *ic_resp;
    2084           3 :         uint32_t error_offset = 0;
    2085             :         enum spdk_nvme_tcp_term_req_fes fes;
    2086             : 
    2087             :         /* Only PFV 0 is defined currently */
    2088           3 :         if (ic_req->pfv != 0) {
    2089           2 :                 SPDK_ERRLOG("Expected ICReq PFV %u, got %u\n", 0u, ic_req->pfv);
    2090           2 :                 fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
    2091           2 :                 error_offset = offsetof(struct spdk_nvme_tcp_ic_req, pfv);
    2092           2 :                 goto end;
    2093             :         }
    2094             : 
    2095             :         /* This value is 0’s based value in units of dwords should not be larger than SPDK_NVME_TCP_HPDA_MAX */
    2096           1 :         if (ic_req->hpda > SPDK_NVME_TCP_HPDA_MAX) {
    2097           0 :                 SPDK_ERRLOG("ICReq HPDA out of range 0 to 31, got %u\n", ic_req->hpda);
    2098           0 :                 fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
    2099           0 :                 error_offset = offsetof(struct spdk_nvme_tcp_ic_req, hpda);
    2100           0 :                 goto end;
    2101             :         }
    2102             : 
    2103             :         /* MAXR2T is 0's based */
    2104           1 :         SPDK_DEBUGLOG(nvmf_tcp, "maxr2t =%u\n", (ic_req->maxr2t + 1u));
    2105             : 
    2106           1 :         tqpair->host_hdgst_enable = ic_req->dgst.bits.hdgst_enable ? true : false;
    2107           1 :         if (!tqpair->host_hdgst_enable) {
    2108           1 :                 tqpair->recv_buf_size -= SPDK_NVME_TCP_DIGEST_LEN * SPDK_NVMF_TCP_RECV_BUF_SIZE_FACTOR;
    2109             :         }
    2110             : 
    2111           1 :         tqpair->host_ddgst_enable = ic_req->dgst.bits.ddgst_enable ? true : false;
    2112           1 :         if (!tqpair->host_ddgst_enable) {
    2113           1 :                 tqpair->recv_buf_size -= SPDK_NVME_TCP_DIGEST_LEN * SPDK_NVMF_TCP_RECV_BUF_SIZE_FACTOR;
    2114             :         }
    2115             : 
    2116           1 :         tqpair->recv_buf_size = spdk_max(tqpair->recv_buf_size, MIN_SOCK_PIPE_SIZE);
    2117             :         /* Now that we know whether digests are enabled, properly size the receive buffer */
    2118           1 :         if (spdk_sock_set_recvbuf(tqpair->sock, tqpair->recv_buf_size) < 0) {
    2119           0 :                 SPDK_WARNLOG("Unable to allocate enough memory for receive buffer on tqpair=%p with size=%d\n",
    2120             :                              tqpair,
    2121             :                              tqpair->recv_buf_size);
    2122             :                 /* Not fatal. */
    2123             :         }
    2124             : 
    2125           1 :         tqpair->cpda = spdk_min(ic_req->hpda, SPDK_NVME_TCP_CPDA_MAX);
    2126           1 :         SPDK_DEBUGLOG(nvmf_tcp, "cpda of tqpair=(%p) is : %u\n", tqpair, tqpair->cpda);
    2127             : 
    2128           1 :         rsp_pdu = tqpair->mgmt_pdu;
    2129             : 
    2130           1 :         ic_resp = &rsp_pdu->hdr.ic_resp;
    2131           1 :         ic_resp->common.pdu_type = SPDK_NVME_TCP_PDU_TYPE_IC_RESP;
    2132           1 :         ic_resp->common.hlen = ic_resp->common.plen =  sizeof(*ic_resp);
    2133           1 :         ic_resp->pfv = 0;
    2134           1 :         ic_resp->cpda = tqpair->cpda;
    2135           1 :         ic_resp->maxh2cdata = ttransport->transport.opts.max_io_size;
    2136           1 :         ic_resp->dgst.bits.hdgst_enable = tqpair->host_hdgst_enable ? 1 : 0;
    2137           1 :         ic_resp->dgst.bits.ddgst_enable = tqpair->host_ddgst_enable ? 1 : 0;
    2138             : 
    2139           1 :         SPDK_DEBUGLOG(nvmf_tcp, "host_hdgst_enable: %u\n", tqpair->host_hdgst_enable);
    2140           1 :         SPDK_DEBUGLOG(nvmf_tcp, "host_ddgst_enable: %u\n", tqpair->host_ddgst_enable);
    2141             : 
    2142           1 :         nvmf_tcp_qpair_set_state(tqpair, NVME_TCP_QPAIR_STATE_INITIALIZING);
    2143           1 :         nvmf_tcp_qpair_write_mgmt_pdu(tqpair, nvmf_tcp_send_icresp_complete, tqpair);
    2144           1 :         nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
    2145           1 :         return;
    2146           2 : end:
    2147           2 :         nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
    2148             : }
    2149             : 
    2150             : static void
    2151           0 : nvmf_tcp_pdu_psh_handle(struct spdk_nvmf_tcp_qpair *tqpair,
    2152             :                         struct spdk_nvmf_tcp_transport *ttransport)
    2153             : {
    2154             :         struct nvme_tcp_pdu *pdu;
    2155             :         int rc;
    2156           0 :         uint32_t crc32c, error_offset = 0;
    2157             :         enum spdk_nvme_tcp_term_req_fes fes;
    2158             : 
    2159           0 :         assert(tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PSH);
    2160           0 :         pdu = tqpair->pdu_in_progress;
    2161             : 
    2162           0 :         SPDK_DEBUGLOG(nvmf_tcp, "pdu type of tqpair(%p) is %d\n", tqpair,
    2163             :                       pdu->hdr.common.pdu_type);
    2164             :         /* check header digest if needed */
    2165           0 :         if (pdu->has_hdgst) {
    2166           0 :                 SPDK_DEBUGLOG(nvmf_tcp, "Compare the header of pdu=%p on tqpair=%p\n", pdu, tqpair);
    2167           0 :                 crc32c = nvme_tcp_pdu_calc_header_digest(pdu);
    2168           0 :                 rc = MATCH_DIGEST_WORD((uint8_t *)pdu->hdr.raw + pdu->hdr.common.hlen, crc32c);
    2169           0 :                 if (rc == 0) {
    2170           0 :                         SPDK_ERRLOG("Header digest error on tqpair=(%p) with pdu=%p\n", tqpair, pdu);
    2171           0 :                         fes = SPDK_NVME_TCP_TERM_REQ_FES_HDGST_ERROR;
    2172           0 :                         nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
    2173           0 :                         return;
    2174             : 
    2175             :                 }
    2176             :         }
    2177             : 
    2178           0 :         switch (pdu->hdr.common.pdu_type) {
    2179           0 :         case SPDK_NVME_TCP_PDU_TYPE_IC_REQ:
    2180           0 :                 nvmf_tcp_icreq_handle(ttransport, tqpair, pdu);
    2181           0 :                 break;
    2182           0 :         case SPDK_NVME_TCP_PDU_TYPE_CAPSULE_CMD:
    2183           0 :                 nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_REQ);
    2184           0 :                 break;
    2185           0 :         case SPDK_NVME_TCP_PDU_TYPE_H2C_DATA:
    2186           0 :                 nvmf_tcp_h2c_data_hdr_handle(ttransport, tqpair, pdu);
    2187           0 :                 break;
    2188             : 
    2189           0 :         case SPDK_NVME_TCP_PDU_TYPE_H2C_TERM_REQ:
    2190           0 :                 nvmf_tcp_h2c_term_req_hdr_handle(tqpair, pdu);
    2191           0 :                 break;
    2192             : 
    2193           0 :         default:
    2194           0 :                 SPDK_ERRLOG("Unexpected PDU type 0x%02x\n", tqpair->pdu_in_progress->hdr.common.pdu_type);
    2195           0 :                 fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
    2196           0 :                 error_offset = 1;
    2197           0 :                 nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
    2198           0 :                 break;
    2199             :         }
    2200             : }
    2201             : 
    2202             : static void
    2203          11 : nvmf_tcp_pdu_ch_handle(struct spdk_nvmf_tcp_qpair *tqpair)
    2204             : {
    2205             :         struct nvme_tcp_pdu *pdu;
    2206          11 :         uint32_t error_offset = 0;
    2207             :         enum spdk_nvme_tcp_term_req_fes fes;
    2208             :         uint8_t expected_hlen, pdo;
    2209          11 :         bool plen_error = false, pdo_error = false;
    2210             : 
    2211          11 :         assert(tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_CH);
    2212          11 :         pdu = tqpair->pdu_in_progress;
    2213          11 :         assert(pdu);
    2214          11 :         if (pdu->hdr.common.pdu_type == SPDK_NVME_TCP_PDU_TYPE_IC_REQ) {
    2215           4 :                 if (tqpair->state != NVME_TCP_QPAIR_STATE_INVALID) {
    2216           1 :                         SPDK_ERRLOG("Already received ICreq PDU, and reject this pdu=%p\n", pdu);
    2217           1 :                         fes = SPDK_NVME_TCP_TERM_REQ_FES_PDU_SEQUENCE_ERROR;
    2218           1 :                         goto err;
    2219             :                 }
    2220           3 :                 expected_hlen = sizeof(struct spdk_nvme_tcp_ic_req);
    2221           3 :                 if (pdu->hdr.common.plen != expected_hlen) {
    2222           1 :                         plen_error = true;
    2223             :                 }
    2224             :         } else {
    2225           7 :                 if (tqpair->state != NVME_TCP_QPAIR_STATE_RUNNING) {
    2226           1 :                         SPDK_ERRLOG("The TCP/IP connection is not negotiated\n");
    2227           1 :                         fes = SPDK_NVME_TCP_TERM_REQ_FES_PDU_SEQUENCE_ERROR;
    2228           1 :                         goto err;
    2229             :                 }
    2230             : 
    2231           6 :                 switch (pdu->hdr.common.pdu_type) {
    2232           2 :                 case SPDK_NVME_TCP_PDU_TYPE_CAPSULE_CMD:
    2233           2 :                         expected_hlen = sizeof(struct spdk_nvme_tcp_cmd);
    2234           2 :                         pdo = pdu->hdr.common.pdo;
    2235           2 :                         if ((tqpair->cpda != 0) && (pdo % ((tqpair->cpda + 1) << 2) != 0)) {
    2236           1 :                                 pdo_error = true;
    2237           1 :                                 break;
    2238             :                         }
    2239             : 
    2240           1 :                         if (pdu->hdr.common.plen < expected_hlen) {
    2241           1 :                                 plen_error = true;
    2242             :                         }
    2243           1 :                         break;
    2244           2 :                 case SPDK_NVME_TCP_PDU_TYPE_H2C_DATA:
    2245           2 :                         expected_hlen = sizeof(struct spdk_nvme_tcp_h2c_data_hdr);
    2246           2 :                         pdo = pdu->hdr.common.pdo;
    2247           2 :                         if ((tqpair->cpda != 0) && (pdo % ((tqpair->cpda + 1) << 2) != 0)) {
    2248           1 :                                 pdo_error = true;
    2249           1 :                                 break;
    2250             :                         }
    2251           1 :                         if (pdu->hdr.common.plen < expected_hlen) {
    2252           1 :                                 plen_error = true;
    2253             :                         }
    2254           1 :                         break;
    2255             : 
    2256           1 :                 case SPDK_NVME_TCP_PDU_TYPE_H2C_TERM_REQ:
    2257           1 :                         expected_hlen = sizeof(struct spdk_nvme_tcp_term_req_hdr);
    2258           1 :                         if ((pdu->hdr.common.plen <= expected_hlen) ||
    2259           0 :                             (pdu->hdr.common.plen > SPDK_NVME_TCP_TERM_REQ_PDU_MAX_SIZE)) {
    2260           1 :                                 plen_error = true;
    2261             :                         }
    2262           1 :                         break;
    2263             : 
    2264           1 :                 default:
    2265           1 :                         SPDK_ERRLOG("Unexpected PDU type 0x%02x\n", pdu->hdr.common.pdu_type);
    2266           1 :                         fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
    2267           1 :                         error_offset = offsetof(struct spdk_nvme_tcp_common_pdu_hdr, pdu_type);
    2268           1 :                         goto err;
    2269             :                 }
    2270             :         }
    2271             : 
    2272           8 :         if (pdu->hdr.common.hlen != expected_hlen) {
    2273           1 :                 SPDK_ERRLOG("PDU type=0x%02x, Expected ICReq header length %u, got %u on tqpair=%p\n",
    2274             :                             pdu->hdr.common.pdu_type,
    2275             :                             expected_hlen, pdu->hdr.common.hlen, tqpair);
    2276           1 :                 fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
    2277           1 :                 error_offset = offsetof(struct spdk_nvme_tcp_common_pdu_hdr, hlen);
    2278           1 :                 goto err;
    2279           7 :         } else if (pdo_error) {
    2280           2 :                 fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
    2281           2 :                 error_offset = offsetof(struct spdk_nvme_tcp_common_pdu_hdr, pdo);
    2282           5 :         } else if (plen_error) {
    2283           4 :                 fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
    2284           4 :                 error_offset = offsetof(struct spdk_nvme_tcp_common_pdu_hdr, plen);
    2285           4 :                 goto err;
    2286             :         } else {
    2287           1 :                 nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PSH);
    2288           1 :                 nvme_tcp_pdu_calc_psh_len(tqpair->pdu_in_progress, tqpair->host_hdgst_enable);
    2289           1 :                 return;
    2290             :         }
    2291          10 : err:
    2292          10 :         nvmf_tcp_send_c2h_term_req(tqpair, pdu, fes, error_offset);
    2293             : }
    2294             : 
    2295             : static int
    2296           0 : nvmf_tcp_sock_process(struct spdk_nvmf_tcp_qpair *tqpair)
    2297             : {
    2298           0 :         int rc = 0;
    2299             :         struct nvme_tcp_pdu *pdu;
    2300             :         enum nvme_tcp_pdu_recv_state prev_state;
    2301             :         uint32_t data_len;
    2302           0 :         struct spdk_nvmf_tcp_transport *ttransport = SPDK_CONTAINEROF(tqpair->qpair.transport,
    2303             :                         struct spdk_nvmf_tcp_transport, transport);
    2304             : 
    2305             :         /* The loop here is to allow for several back-to-back state changes. */
    2306             :         do {
    2307           0 :                 prev_state = tqpair->recv_state;
    2308           0 :                 SPDK_DEBUGLOG(nvmf_tcp, "tqpair(%p) recv pdu entering state %d\n", tqpair, prev_state);
    2309             : 
    2310           0 :                 pdu = tqpair->pdu_in_progress;
    2311           0 :                 assert(pdu != NULL ||
    2312             :                        tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY ||
    2313             :                        tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_QUIESCING ||
    2314             :                        tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_ERROR);
    2315             : 
    2316           0 :                 switch (tqpair->recv_state) {
    2317             :                 /* Wait for the common header  */
    2318           0 :                 case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY:
    2319           0 :                         if (!pdu) {
    2320           0 :                                 pdu = SLIST_FIRST(&tqpair->tcp_pdu_free_queue);
    2321           0 :                                 if (spdk_unlikely(!pdu)) {
    2322           0 :                                         return NVME_TCP_PDU_IN_PROGRESS;
    2323             :                                 }
    2324           0 :                                 SLIST_REMOVE_HEAD(&tqpair->tcp_pdu_free_queue, slist);
    2325           0 :                                 tqpair->pdu_in_progress = pdu;
    2326           0 :                                 tqpair->tcp_pdu_working_count++;
    2327             :                         }
    2328           0 :                         memset(pdu, 0, offsetof(struct nvme_tcp_pdu, qpair));
    2329           0 :                         nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_CH);
    2330             :                 /* FALLTHROUGH */
    2331           0 :                 case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_CH:
    2332           0 :                         if (spdk_unlikely(tqpair->state == NVME_TCP_QPAIR_STATE_INITIALIZING)) {
    2333           0 :                                 return rc;
    2334             :                         }
    2335             : 
    2336           0 :                         rc = nvme_tcp_read_data(tqpair->sock,
    2337           0 :                                                 sizeof(struct spdk_nvme_tcp_common_pdu_hdr) - pdu->ch_valid_bytes,
    2338           0 :                                                 (void *)&pdu->hdr.common + pdu->ch_valid_bytes);
    2339           0 :                         if (rc < 0) {
    2340           0 :                                 SPDK_DEBUGLOG(nvmf_tcp, "will disconnect tqpair=%p\n", tqpair);
    2341           0 :                                 nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_QUIESCING);
    2342           0 :                                 break;
    2343           0 :                         } else if (rc > 0) {
    2344           0 :                                 pdu->ch_valid_bytes += rc;
    2345           0 :                                 spdk_trace_record(TRACE_TCP_READ_FROM_SOCKET_DONE, tqpair->qpair.qid, rc, 0, tqpair);
    2346             :                         }
    2347             : 
    2348           0 :                         if (pdu->ch_valid_bytes < sizeof(struct spdk_nvme_tcp_common_pdu_hdr)) {
    2349           0 :                                 return NVME_TCP_PDU_IN_PROGRESS;
    2350             :                         }
    2351             : 
    2352             :                         /* The command header of this PDU has now been read from the socket. */
    2353           0 :                         nvmf_tcp_pdu_ch_handle(tqpair);
    2354           0 :                         break;
    2355             :                 /* Wait for the pdu specific header  */
    2356           0 :                 case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PSH:
    2357           0 :                         rc = nvme_tcp_read_data(tqpair->sock,
    2358           0 :                                                 pdu->psh_len - pdu->psh_valid_bytes,
    2359           0 :                                                 (void *)&pdu->hdr.raw + sizeof(struct spdk_nvme_tcp_common_pdu_hdr) + pdu->psh_valid_bytes);
    2360           0 :                         if (rc < 0) {
    2361           0 :                                 nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_QUIESCING);
    2362           0 :                                 break;
    2363           0 :                         } else if (rc > 0) {
    2364           0 :                                 spdk_trace_record(TRACE_TCP_READ_FROM_SOCKET_DONE, tqpair->qpair.qid, rc, 0, tqpair);
    2365           0 :                                 pdu->psh_valid_bytes += rc;
    2366             :                         }
    2367             : 
    2368           0 :                         if (pdu->psh_valid_bytes < pdu->psh_len) {
    2369           0 :                                 return NVME_TCP_PDU_IN_PROGRESS;
    2370             :                         }
    2371             : 
    2372             :                         /* All header(ch, psh, head digist) of this PDU has now been read from the socket. */
    2373           0 :                         nvmf_tcp_pdu_psh_handle(tqpair, ttransport);
    2374           0 :                         break;
    2375             :                 /* Wait for the req slot */
    2376           0 :                 case NVME_TCP_PDU_RECV_STATE_AWAIT_REQ:
    2377           0 :                         nvmf_tcp_capsule_cmd_hdr_handle(ttransport, tqpair, pdu);
    2378           0 :                         break;
    2379           0 :                 case NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD:
    2380             :                         /* check whether the data is valid, if not we just return */
    2381           0 :                         if (!pdu->data_len) {
    2382           0 :                                 return NVME_TCP_PDU_IN_PROGRESS;
    2383             :                         }
    2384             : 
    2385           0 :                         data_len = pdu->data_len;
    2386             :                         /* data digest */
    2387           0 :                         if (spdk_unlikely((pdu->hdr.common.pdu_type != SPDK_NVME_TCP_PDU_TYPE_H2C_TERM_REQ) &&
    2388             :                                           tqpair->host_ddgst_enable)) {
    2389           0 :                                 data_len += SPDK_NVME_TCP_DIGEST_LEN;
    2390           0 :                                 pdu->ddgst_enable = true;
    2391             :                         }
    2392             : 
    2393           0 :                         rc = nvme_tcp_read_payload_data(tqpair->sock, pdu);
    2394           0 :                         if (rc < 0) {
    2395           0 :                                 nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_QUIESCING);
    2396           0 :                                 break;
    2397             :                         }
    2398           0 :                         pdu->rw_offset += rc;
    2399             : 
    2400           0 :                         if (pdu->rw_offset < data_len) {
    2401           0 :                                 return NVME_TCP_PDU_IN_PROGRESS;
    2402             :                         }
    2403             : 
    2404             :                         /* Generate and insert DIF to whole data block received if DIF is enabled */
    2405           0 :                         if (spdk_unlikely(pdu->dif_ctx != NULL) &&
    2406           0 :                             spdk_dif_generate_stream(pdu->data_iov, pdu->data_iovcnt, 0, data_len,
    2407             :                                                      pdu->dif_ctx) != 0) {
    2408           0 :                                 SPDK_ERRLOG("DIF generate failed\n");
    2409           0 :                                 nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_QUIESCING);
    2410           0 :                                 break;
    2411             :                         }
    2412             : 
    2413             :                         /* All of this PDU has now been read from the socket. */
    2414           0 :                         nvmf_tcp_pdu_payload_handle(tqpair, pdu);
    2415           0 :                         break;
    2416           0 :                 case NVME_TCP_PDU_RECV_STATE_QUIESCING:
    2417           0 :                         if (tqpair->tcp_pdu_working_count != 0) {
    2418           0 :                                 return NVME_TCP_PDU_IN_PROGRESS;
    2419             :                         }
    2420           0 :                         nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_ERROR);
    2421           0 :                         break;
    2422           0 :                 case NVME_TCP_PDU_RECV_STATE_ERROR:
    2423           0 :                         if (spdk_sock_is_connected(tqpair->sock) && tqpair->wait_terminate) {
    2424           0 :                                 return NVME_TCP_PDU_IN_PROGRESS;
    2425             :                         }
    2426           0 :                         return NVME_TCP_PDU_FATAL;
    2427           0 :                 default:
    2428           0 :                         SPDK_ERRLOG("The state(%d) is invalid\n", tqpair->recv_state);
    2429           0 :                         abort();
    2430             :                         break;
    2431             :                 }
    2432           0 :         } while (tqpair->recv_state != prev_state);
    2433             : 
    2434           0 :         return rc;
    2435             : }
    2436             : 
    2437             : static inline void *
    2438           0 : nvmf_tcp_control_msg_get(struct spdk_nvmf_tcp_control_msg_list *list)
    2439             : {
    2440             :         struct spdk_nvmf_tcp_control_msg *msg;
    2441             : 
    2442           0 :         assert(list);
    2443             : 
    2444           0 :         msg = STAILQ_FIRST(&list->free_msgs);
    2445           0 :         if (!msg) {
    2446           0 :                 SPDK_DEBUGLOG(nvmf_tcp, "Out of control messages\n");
    2447           0 :                 return NULL;
    2448             :         }
    2449           0 :         STAILQ_REMOVE_HEAD(&list->free_msgs, link);
    2450           0 :         return msg;
    2451             : }
    2452             : 
    2453             : static inline void
    2454           0 : nvmf_tcp_control_msg_put(struct spdk_nvmf_tcp_control_msg_list *list, void *_msg)
    2455             : {
    2456           0 :         struct spdk_nvmf_tcp_control_msg *msg = _msg;
    2457             : 
    2458           0 :         assert(list);
    2459           0 :         STAILQ_INSERT_HEAD(&list->free_msgs, msg, link);
    2460           0 : }
    2461             : 
    2462             : static int
    2463           3 : nvmf_tcp_req_parse_sgl(struct spdk_nvmf_tcp_req *tcp_req,
    2464             :                        struct spdk_nvmf_transport *transport,
    2465             :                        struct spdk_nvmf_transport_poll_group *group)
    2466             : {
    2467           3 :         struct spdk_nvmf_request                *req = &tcp_req->req;
    2468             :         struct spdk_nvme_cmd                    *cmd;
    2469             :         struct spdk_nvme_sgl_descriptor         *sgl;
    2470             :         struct spdk_nvmf_tcp_poll_group         *tgroup;
    2471             :         enum spdk_nvme_tcp_term_req_fes         fes;
    2472             :         struct nvme_tcp_pdu                     *pdu;
    2473             :         struct spdk_nvmf_tcp_qpair              *tqpair;
    2474           3 :         uint32_t                                length, error_offset = 0;
    2475             : 
    2476           3 :         cmd = &req->cmd->nvme_cmd;
    2477           3 :         sgl = &cmd->dptr.sgl1;
    2478             : 
    2479           3 :         if (sgl->generic.type == SPDK_NVME_SGL_TYPE_TRANSPORT_DATA_BLOCK &&
    2480           3 :             sgl->unkeyed.subtype == SPDK_NVME_SGL_SUBTYPE_TRANSPORT) {
    2481             :                 /* get request length from sgl */
    2482           3 :                 length = sgl->unkeyed.length;
    2483           3 :                 if (spdk_unlikely(length > transport->opts.max_io_size)) {
    2484           1 :                         SPDK_ERRLOG("SGL length 0x%x exceeds max io size 0x%x\n",
    2485             :                                     length, transport->opts.max_io_size);
    2486           1 :                         fes = SPDK_NVME_TCP_TERM_REQ_FES_DATA_TRANSFER_LIMIT_EXCEEDED;
    2487           1 :                         goto fatal_err;
    2488             :                 }
    2489             : 
    2490             :                 /* fill request length and populate iovs */
    2491           2 :                 req->length = length;
    2492             : 
    2493           2 :                 SPDK_DEBUGLOG(nvmf_tcp, "Data requested length= 0x%x\n", length);
    2494             : 
    2495           2 :                 if (spdk_unlikely(req->dif_enabled)) {
    2496           0 :                         req->dif.orig_length = length;
    2497           0 :                         length = spdk_dif_get_length_with_md(length, &req->dif.dif_ctx);
    2498           0 :                         req->dif.elba_length = length;
    2499             :                 }
    2500             : 
    2501           2 :                 if (nvmf_ctrlr_use_zcopy(req)) {
    2502           0 :                         SPDK_DEBUGLOG(nvmf_tcp, "Using zero-copy to execute request %p\n", tcp_req);
    2503           0 :                         req->data_from_pool = false;
    2504           0 :                         return 0;
    2505             :                 }
    2506             : 
    2507           2 :                 if (spdk_nvmf_request_get_buffers(req, group, transport, length)) {
    2508             :                         /* No available buffers. Queue this request up. */
    2509           1 :                         SPDK_DEBUGLOG(nvmf_tcp, "No available large data buffers. Queueing request %p\n",
    2510             :                                       tcp_req);
    2511           1 :                         return 0;
    2512             :                 }
    2513             : 
    2514           1 :                 SPDK_DEBUGLOG(nvmf_tcp, "Request %p took %d buffer/s from central pool, and data=%p\n",
    2515             :                               tcp_req, req->iovcnt, req->iov[0].iov_base);
    2516             : 
    2517           1 :                 return 0;
    2518           0 :         } else if (sgl->generic.type == SPDK_NVME_SGL_TYPE_DATA_BLOCK &&
    2519           0 :                    sgl->unkeyed.subtype == SPDK_NVME_SGL_SUBTYPE_OFFSET) {
    2520           0 :                 uint64_t offset = sgl->address;
    2521           0 :                 uint32_t max_len = transport->opts.in_capsule_data_size;
    2522             : 
    2523           0 :                 assert(tcp_req->has_in_capsule_data);
    2524             :                 /* Capsule Cmd with In-capsule Data should get data length from pdu header */
    2525           0 :                 tqpair = tcp_req->pdu->qpair;
    2526             :                 /* receiving pdu is not same with the pdu in tcp_req */
    2527           0 :                 pdu = tqpair->pdu_in_progress;
    2528           0 :                 length = pdu->hdr.common.plen - pdu->psh_len - sizeof(struct spdk_nvme_tcp_common_pdu_hdr);
    2529           0 :                 if (tqpair->host_ddgst_enable) {
    2530           0 :                         length -= SPDK_NVME_TCP_DIGEST_LEN;
    2531             :                 }
    2532             :                 /* This error is not defined in NVMe/TCP spec, take this error as fatal error */
    2533           0 :                 if (spdk_unlikely(length != sgl->unkeyed.length)) {
    2534           0 :                         SPDK_ERRLOG("In-Capsule Data length 0x%x is not equal to SGL data length 0x%x\n",
    2535             :                                     length, sgl->unkeyed.length);
    2536           0 :                         fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_HEADER_FIELD;
    2537           0 :                         error_offset = offsetof(struct spdk_nvme_tcp_common_pdu_hdr, plen);
    2538           0 :                         goto fatal_err;
    2539             :                 }
    2540             : 
    2541           0 :                 SPDK_DEBUGLOG(nvmf_tcp, "In-capsule data: offset 0x%" PRIx64 ", length 0x%x\n",
    2542             :                               offset, length);
    2543             : 
    2544             :                 /* The NVMe/TCP transport does not use ICDOFF to control the in-capsule data offset. ICDOFF should be '0' */
    2545           0 :                 if (spdk_unlikely(offset != 0)) {
    2546             :                         /* Not defined fatal error in NVMe/TCP spec, handle this error as a fatal error */
    2547           0 :                         SPDK_ERRLOG("In-capsule offset 0x%" PRIx64 " should be ZERO in NVMe/TCP\n", offset);
    2548           0 :                         fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_DATA_UNSUPPORTED_PARAMETER;
    2549           0 :                         error_offset = offsetof(struct spdk_nvme_tcp_cmd, ccsqe.dptr.sgl1.address);
    2550           0 :                         goto fatal_err;
    2551             :                 }
    2552             : 
    2553           0 :                 if (spdk_unlikely(length > max_len)) {
    2554             :                         /* According to the SPEC we should support ICD up to 8192 bytes for admin and fabric commands */
    2555           0 :                         if (length <= SPDK_NVME_TCP_IN_CAPSULE_DATA_MAX_SIZE &&
    2556           0 :                             (cmd->opc == SPDK_NVME_OPC_FABRIC || req->qpair->qid == 0)) {
    2557             : 
    2558             :                                 /* Get a buffer from dedicated list */
    2559           0 :                                 SPDK_DEBUGLOG(nvmf_tcp, "Getting a buffer from control msg list\n");
    2560           0 :                                 tgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_tcp_poll_group, group);
    2561           0 :                                 assert(tgroup->control_msg_list);
    2562           0 :                                 req->iov[0].iov_base = nvmf_tcp_control_msg_get(tgroup->control_msg_list);
    2563           0 :                                 if (!req->iov[0].iov_base) {
    2564             :                                         /* No available buffers. Queue this request up. */
    2565           0 :                                         SPDK_DEBUGLOG(nvmf_tcp, "No available ICD buffers. Queueing request %p\n", tcp_req);
    2566           0 :                                         return 0;
    2567             :                                 }
    2568             :                         } else {
    2569           0 :                                 SPDK_ERRLOG("In-capsule data length 0x%x exceeds capsule length 0x%x\n",
    2570             :                                             length, max_len);
    2571           0 :                                 fes = SPDK_NVME_TCP_TERM_REQ_FES_DATA_TRANSFER_LIMIT_EXCEEDED;
    2572           0 :                                 goto fatal_err;
    2573             :                         }
    2574             :                 } else {
    2575           0 :                         req->iov[0].iov_base = tcp_req->buf;
    2576             :                 }
    2577             : 
    2578           0 :                 req->length = length;
    2579           0 :                 req->data_from_pool = false;
    2580             : 
    2581           0 :                 if (spdk_unlikely(req->dif_enabled)) {
    2582           0 :                         length = spdk_dif_get_length_with_md(length, &req->dif.dif_ctx);
    2583           0 :                         req->dif.elba_length = length;
    2584             :                 }
    2585             : 
    2586           0 :                 req->iov[0].iov_len = length;
    2587           0 :                 req->iovcnt = 1;
    2588             : 
    2589           0 :                 return 0;
    2590             :         }
    2591             :         /* If we want to handle the problem here, then we can't skip the following data segment.
    2592             :          * Because this function runs before reading data part, now handle all errors as fatal errors. */
    2593           0 :         SPDK_ERRLOG("Invalid NVMf I/O Command SGL:  Type 0x%x, Subtype 0x%x\n",
    2594             :                     sgl->generic.type, sgl->generic.subtype);
    2595           0 :         fes = SPDK_NVME_TCP_TERM_REQ_FES_INVALID_DATA_UNSUPPORTED_PARAMETER;
    2596           0 :         error_offset = offsetof(struct spdk_nvme_tcp_cmd, ccsqe.dptr.sgl1.generic);
    2597           1 : fatal_err:
    2598           1 :         nvmf_tcp_send_c2h_term_req(tcp_req->pdu->qpair, tcp_req->pdu, fes, error_offset);
    2599           1 :         return -1;
    2600             : }
    2601             : 
    2602             : static inline enum spdk_nvme_media_error_status_code
    2603           0 : nvmf_tcp_dif_error_to_compl_status(uint8_t err_type) {
    2604             :         enum spdk_nvme_media_error_status_code result;
    2605             : 
    2606           0 :         switch (err_type)
    2607             :         {
    2608           0 :         case SPDK_DIF_REFTAG_ERROR:
    2609           0 :                 result = SPDK_NVME_SC_REFERENCE_TAG_CHECK_ERROR;
    2610           0 :                 break;
    2611           0 :         case SPDK_DIF_APPTAG_ERROR:
    2612           0 :                 result = SPDK_NVME_SC_APPLICATION_TAG_CHECK_ERROR;
    2613           0 :                 break;
    2614           0 :         case SPDK_DIF_GUARD_ERROR:
    2615           0 :                 result = SPDK_NVME_SC_GUARD_CHECK_ERROR;
    2616           0 :                 break;
    2617           0 :         default:
    2618           0 :                 SPDK_UNREACHABLE();
    2619             :                 break;
    2620             :         }
    2621             : 
    2622           0 :         return result;
    2623             : }
    2624             : 
    2625             : static void
    2626           4 : _nvmf_tcp_send_c2h_data(struct spdk_nvmf_tcp_qpair *tqpair,
    2627             :                         struct spdk_nvmf_tcp_req *tcp_req)
    2628             : {
    2629           4 :         struct spdk_nvmf_tcp_transport *ttransport = SPDK_CONTAINEROF(
    2630             :                                 tqpair->qpair.transport, struct spdk_nvmf_tcp_transport, transport);
    2631             :         struct nvme_tcp_pdu *rsp_pdu;
    2632             :         struct spdk_nvme_tcp_c2h_data_hdr *c2h_data;
    2633             :         uint32_t plen, pdo, alignment;
    2634             :         int rc;
    2635             : 
    2636           4 :         SPDK_DEBUGLOG(nvmf_tcp, "enter\n");
    2637             : 
    2638           4 :         rsp_pdu = tcp_req->pdu;
    2639           4 :         assert(rsp_pdu != NULL);
    2640             : 
    2641           4 :         c2h_data = &rsp_pdu->hdr.c2h_data;
    2642           4 :         c2h_data->common.pdu_type = SPDK_NVME_TCP_PDU_TYPE_C2H_DATA;
    2643           4 :         plen = c2h_data->common.hlen = sizeof(*c2h_data);
    2644             : 
    2645           4 :         if (tqpair->host_hdgst_enable) {
    2646           0 :                 plen += SPDK_NVME_TCP_DIGEST_LEN;
    2647           0 :                 c2h_data->common.flags |= SPDK_NVME_TCP_CH_FLAGS_HDGSTF;
    2648             :         }
    2649             : 
    2650             :         /* set the psh */
    2651           4 :         c2h_data->cccid = tcp_req->req.cmd->nvme_cmd.cid;
    2652           4 :         c2h_data->datal = tcp_req->req.length - tcp_req->pdu->rw_offset;
    2653           4 :         c2h_data->datao = tcp_req->pdu->rw_offset;
    2654             : 
    2655             :         /* set the padding */
    2656           4 :         rsp_pdu->padding_len = 0;
    2657           4 :         pdo = plen;
    2658           4 :         if (tqpair->cpda) {
    2659           0 :                 alignment = (tqpair->cpda + 1) << 2;
    2660           0 :                 if (plen % alignment != 0) {
    2661           0 :                         pdo = (plen + alignment) / alignment * alignment;
    2662           0 :                         rsp_pdu->padding_len = pdo - plen;
    2663           0 :                         plen = pdo;
    2664             :                 }
    2665             :         }
    2666             : 
    2667           4 :         c2h_data->common.pdo = pdo;
    2668           4 :         plen += c2h_data->datal;
    2669           4 :         if (tqpair->host_ddgst_enable) {
    2670           0 :                 c2h_data->common.flags |= SPDK_NVME_TCP_CH_FLAGS_DDGSTF;
    2671           0 :                 plen += SPDK_NVME_TCP_DIGEST_LEN;
    2672             :         }
    2673             : 
    2674           4 :         c2h_data->common.plen = plen;
    2675             : 
    2676           4 :         if (spdk_unlikely(tcp_req->req.dif_enabled)) {
    2677           0 :                 rsp_pdu->dif_ctx = &tcp_req->req.dif.dif_ctx;
    2678             :         }
    2679             : 
    2680           4 :         nvme_tcp_pdu_set_data_buf(rsp_pdu, tcp_req->req.iov, tcp_req->req.iovcnt,
    2681             :                                   c2h_data->datao, c2h_data->datal);
    2682             : 
    2683             : 
    2684           4 :         c2h_data->common.flags |= SPDK_NVME_TCP_C2H_DATA_FLAGS_LAST_PDU;
    2685             :         /* Need to send the capsule response if response is not all 0 */
    2686           4 :         if (ttransport->tcp_opts.c2h_success &&
    2687           2 :             tcp_req->rsp.cdw0 == 0 && tcp_req->rsp.cdw1 == 0) {
    2688           1 :                 c2h_data->common.flags |= SPDK_NVME_TCP_C2H_DATA_FLAGS_SUCCESS;
    2689             :         }
    2690             : 
    2691           4 :         if (spdk_unlikely(tcp_req->req.dif_enabled)) {
    2692           0 :                 struct spdk_nvme_cpl *rsp = &tcp_req->req.rsp->nvme_cpl;
    2693           0 :                 struct spdk_dif_error err_blk = {};
    2694           0 :                 uint32_t mapped_length = 0;
    2695           0 :                 uint32_t available_iovs = SPDK_COUNTOF(rsp_pdu->iov);
    2696           0 :                 uint32_t ddgst_len = 0;
    2697             : 
    2698           0 :                 if (tqpair->host_ddgst_enable) {
    2699             :                         /* Data digest consumes additional iov entry */
    2700           0 :                         available_iovs--;
    2701             :                         /* plen needs to be updated since nvme_tcp_build_iovs compares expected and actual plen */
    2702           0 :                         ddgst_len = SPDK_NVME_TCP_DIGEST_LEN;
    2703           0 :                         c2h_data->common.plen -= ddgst_len;
    2704             :                 }
    2705             :                 /* Temp call to estimate if data can be described by limited number of iovs.
    2706             :                  * iov vector will be rebuilt in nvmf_tcp_qpair_write_pdu */
    2707           0 :                 nvme_tcp_build_iovs(rsp_pdu->iov, available_iovs, rsp_pdu, tqpair->host_hdgst_enable,
    2708             :                                     false, &mapped_length);
    2709             : 
    2710           0 :                 if (mapped_length != c2h_data->common.plen) {
    2711           0 :                         c2h_data->datal = mapped_length - (c2h_data->common.plen - c2h_data->datal);
    2712           0 :                         SPDK_DEBUGLOG(nvmf_tcp,
    2713             :                                       "Part C2H, data_len %u (of %u), PDU len %u, updated PDU len %u, offset %u\n",
    2714             :                                       c2h_data->datal, tcp_req->req.length, c2h_data->common.plen, mapped_length, rsp_pdu->rw_offset);
    2715           0 :                         c2h_data->common.plen = mapped_length;
    2716             : 
    2717             :                         /* Rebuild pdu->data_iov since data length is changed */
    2718           0 :                         nvme_tcp_pdu_set_data_buf(rsp_pdu, tcp_req->req.iov, tcp_req->req.iovcnt, c2h_data->datao,
    2719             :                                                   c2h_data->datal);
    2720             : 
    2721           0 :                         c2h_data->common.flags &= ~(SPDK_NVME_TCP_C2H_DATA_FLAGS_LAST_PDU |
    2722             :                                                     SPDK_NVME_TCP_C2H_DATA_FLAGS_SUCCESS);
    2723             :                 }
    2724             : 
    2725           0 :                 c2h_data->common.plen += ddgst_len;
    2726             : 
    2727           0 :                 assert(rsp_pdu->rw_offset <= tcp_req->req.length);
    2728             : 
    2729           0 :                 rc = spdk_dif_verify_stream(rsp_pdu->data_iov, rsp_pdu->data_iovcnt,
    2730             :                                             0, rsp_pdu->data_len, rsp_pdu->dif_ctx, &err_blk);
    2731           0 :                 if (rc != 0) {
    2732           0 :                         SPDK_ERRLOG("DIF error detected. type=%d, offset=%" PRIu32 "\n",
    2733             :                                     err_blk.err_type, err_blk.err_offset);
    2734           0 :                         rsp->status.sct = SPDK_NVME_SCT_MEDIA_ERROR;
    2735           0 :                         rsp->status.sc = nvmf_tcp_dif_error_to_compl_status(err_blk.err_type);
    2736           0 :                         nvmf_tcp_send_capsule_resp_pdu(tcp_req, tqpair);
    2737           0 :                         return;
    2738             :                 }
    2739             :         }
    2740             : 
    2741           4 :         rsp_pdu->rw_offset += c2h_data->datal;
    2742           4 :         nvmf_tcp_qpair_write_req_pdu(tqpair, tcp_req, nvmf_tcp_pdu_c2h_data_complete, tcp_req);
    2743             : }
    2744             : 
    2745             : static void
    2746           4 : nvmf_tcp_send_c2h_data(struct spdk_nvmf_tcp_qpair *tqpair,
    2747             :                        struct spdk_nvmf_tcp_req *tcp_req)
    2748             : {
    2749           4 :         nvmf_tcp_req_pdu_init(tcp_req);
    2750           4 :         _nvmf_tcp_send_c2h_data(tqpair, tcp_req);
    2751           4 : }
    2752             : 
    2753             : static int
    2754           1 : request_transfer_out(struct spdk_nvmf_request *req)
    2755             : {
    2756             :         struct spdk_nvmf_tcp_req        *tcp_req;
    2757             :         struct spdk_nvmf_qpair          *qpair;
    2758             :         struct spdk_nvmf_tcp_qpair      *tqpair;
    2759             :         struct spdk_nvme_cpl            *rsp;
    2760             : 
    2761           1 :         SPDK_DEBUGLOG(nvmf_tcp, "enter\n");
    2762             : 
    2763           1 :         qpair = req->qpair;
    2764           1 :         rsp = &req->rsp->nvme_cpl;
    2765           1 :         tcp_req = SPDK_CONTAINEROF(req, struct spdk_nvmf_tcp_req, req);
    2766             : 
    2767             :         /* Advance our sq_head pointer */
    2768           1 :         if (qpair->sq_head == qpair->sq_head_max) {
    2769           1 :                 qpair->sq_head = 0;
    2770             :         } else {
    2771           0 :                 qpair->sq_head++;
    2772             :         }
    2773           1 :         rsp->sqhd = qpair->sq_head;
    2774             : 
    2775           1 :         tqpair = SPDK_CONTAINEROF(tcp_req->req.qpair, struct spdk_nvmf_tcp_qpair, qpair);
    2776           1 :         nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST);
    2777           1 :         if (rsp->status.sc == SPDK_NVME_SC_SUCCESS && req->xfer == SPDK_NVME_DATA_CONTROLLER_TO_HOST) {
    2778           0 :                 nvmf_tcp_send_c2h_data(tqpair, tcp_req);
    2779             :         } else {
    2780           1 :                 nvmf_tcp_send_capsule_resp_pdu(tcp_req, tqpair);
    2781             :         }
    2782             : 
    2783           1 :         return 0;
    2784             : }
    2785             : 
    2786             : static void
    2787           4 : nvmf_tcp_check_fused_ordering(struct spdk_nvmf_tcp_transport *ttransport,
    2788             :                               struct spdk_nvmf_tcp_qpair *tqpair,
    2789             :                               struct spdk_nvmf_tcp_req *tcp_req)
    2790             : {
    2791             :         enum spdk_nvme_cmd_fuse last, next;
    2792             : 
    2793           4 :         last = tqpair->fused_first ? tqpair->fused_first->cmd.fuse : SPDK_NVME_CMD_FUSE_NONE;
    2794           4 :         next = tcp_req->cmd.fuse;
    2795             : 
    2796           4 :         assert(last != SPDK_NVME_CMD_FUSE_SECOND);
    2797             : 
    2798           4 :         if (spdk_likely(last == SPDK_NVME_CMD_FUSE_NONE && next == SPDK_NVME_CMD_FUSE_NONE)) {
    2799           4 :                 return;
    2800             :         }
    2801             : 
    2802           0 :         if (last == SPDK_NVME_CMD_FUSE_FIRST) {
    2803           0 :                 if (next == SPDK_NVME_CMD_FUSE_SECOND) {
    2804             :                         /* This is a valid pair of fused commands.  Point them at each other
    2805             :                          * so they can be submitted consecutively once ready to be executed.
    2806             :                          */
    2807           0 :                         tqpair->fused_first->fused_pair = tcp_req;
    2808           0 :                         tcp_req->fused_pair = tqpair->fused_first;
    2809           0 :                         tqpair->fused_first = NULL;
    2810           0 :                         return;
    2811             :                 } else {
    2812             :                         /* Mark the last req as failed since it wasn't followed by a SECOND. */
    2813           0 :                         tqpair->fused_first->fused_failed = true;
    2814             : 
    2815             :                         /*
    2816             :                          * If the last req is in READY_TO_EXECUTE state, then call
    2817             :                          * nvmf_tcp_req_process(), otherwise nothing else will kick it.
    2818             :                          */
    2819           0 :                         if (tqpair->fused_first->state == TCP_REQUEST_STATE_READY_TO_EXECUTE) {
    2820           0 :                                 nvmf_tcp_req_process(ttransport, tqpair->fused_first);
    2821             :                         }
    2822             : 
    2823           0 :                         tqpair->fused_first = NULL;
    2824             :                 }
    2825             :         }
    2826             : 
    2827           0 :         if (next == SPDK_NVME_CMD_FUSE_FIRST) {
    2828             :                 /* Set tqpair->fused_first here so that we know to check that the next request
    2829             :                  * is a SECOND (and to fail this one if it isn't).
    2830             :                  */
    2831           0 :                 tqpair->fused_first = tcp_req;
    2832           0 :         } else if (next == SPDK_NVME_CMD_FUSE_SECOND) {
    2833             :                 /* Mark this req failed since it is a SECOND and the last one was not a FIRST. */
    2834           0 :                 tcp_req->fused_failed = true;
    2835             :         }
    2836             : }
    2837             : 
    2838             : static bool
    2839           4 : nvmf_tcp_req_process(struct spdk_nvmf_tcp_transport *ttransport,
    2840             :                      struct spdk_nvmf_tcp_req *tcp_req)
    2841             : {
    2842             :         struct spdk_nvmf_tcp_qpair              *tqpair;
    2843             :         uint32_t                                plen;
    2844             :         struct nvme_tcp_pdu                     *pdu;
    2845             :         enum spdk_nvmf_tcp_req_state            prev_state;
    2846           4 :         bool                                    progress = false;
    2847           4 :         struct spdk_nvmf_transport              *transport = &ttransport->transport;
    2848             :         struct spdk_nvmf_transport_poll_group   *group;
    2849             :         struct spdk_nvmf_tcp_poll_group         *tgroup;
    2850             : 
    2851           4 :         tqpair = SPDK_CONTAINEROF(tcp_req->req.qpair, struct spdk_nvmf_tcp_qpair, qpair);
    2852           4 :         group = &tqpair->group->group;
    2853           4 :         assert(tcp_req->state != TCP_REQUEST_STATE_FREE);
    2854             : 
    2855             :         /* If the qpair is not active, we need to abort the outstanding requests. */
    2856           4 :         if (tqpair->qpair.state != SPDK_NVMF_QPAIR_ACTIVE) {
    2857           0 :                 if (tcp_req->state == TCP_REQUEST_STATE_NEED_BUFFER) {
    2858           0 :                         STAILQ_REMOVE(&group->pending_buf_queue, &tcp_req->req, spdk_nvmf_request, buf_link);
    2859             :                 }
    2860           0 :                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_COMPLETED);
    2861             :         }
    2862             : 
    2863             :         /* The loop here is to allow for several back-to-back state changes. */
    2864             :         do {
    2865          10 :                 prev_state = tcp_req->state;
    2866             : 
    2867          10 :                 SPDK_DEBUGLOG(nvmf_tcp, "Request %p entering state %d on tqpair=%p\n", tcp_req, prev_state,
    2868             :                               tqpair);
    2869             : 
    2870          10 :                 switch (tcp_req->state) {
    2871           0 :                 case TCP_REQUEST_STATE_FREE:
    2872             :                         /* Some external code must kick a request into TCP_REQUEST_STATE_NEW
    2873             :                          * to escape this state. */
    2874           0 :                         break;
    2875           4 :                 case TCP_REQUEST_STATE_NEW:
    2876           4 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_NEW, tqpair->qpair.qid, 0, (uintptr_t)tcp_req, tqpair);
    2877             : 
    2878             :                         /* copy the cmd from the receive pdu */
    2879           4 :                         tcp_req->cmd = tqpair->pdu_in_progress->hdr.capsule_cmd.ccsqe;
    2880             : 
    2881           4 :                         if (spdk_unlikely(spdk_nvmf_request_get_dif_ctx(&tcp_req->req, &tcp_req->req.dif.dif_ctx))) {
    2882           0 :                                 tcp_req->req.dif_enabled = true;
    2883           0 :                                 tqpair->pdu_in_progress->dif_ctx = &tcp_req->req.dif.dif_ctx;
    2884             :                         }
    2885             : 
    2886           4 :                         nvmf_tcp_check_fused_ordering(ttransport, tqpair, tcp_req);
    2887             : 
    2888             :                         /* The next state transition depends on the data transfer needs of this request. */
    2889           4 :                         tcp_req->req.xfer = spdk_nvmf_req_get_xfer(&tcp_req->req);
    2890             : 
    2891           4 :                         if (spdk_unlikely(tcp_req->req.xfer == SPDK_NVME_DATA_BIDIRECTIONAL)) {
    2892           1 :                                 nvmf_tcp_req_set_cpl(tcp_req, SPDK_NVME_SCT_GENERIC, SPDK_NVME_SC_INVALID_OPCODE);
    2893           1 :                                 nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
    2894           1 :                                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_COMPLETE);
    2895           1 :                                 SPDK_DEBUGLOG(nvmf_tcp, "Request %p: invalid xfer type (BIDIRECTIONAL)\n", tcp_req);
    2896           1 :                                 break;
    2897             :                         }
    2898             : 
    2899             :                         /* If no data to transfer, ready to execute. */
    2900           3 :                         if (tcp_req->req.xfer == SPDK_NVME_DATA_NONE) {
    2901             :                                 /* Reset the tqpair receiving pdu state */
    2902           0 :                                 nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
    2903           0 :                                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
    2904           0 :                                 break;
    2905             :                         }
    2906             : 
    2907           3 :                         pdu = tqpair->pdu_in_progress;
    2908           3 :                         plen = pdu->hdr.common.hlen;
    2909           3 :                         if (tqpair->host_hdgst_enable) {
    2910           0 :                                 plen += SPDK_NVME_TCP_DIGEST_LEN;
    2911             :                         }
    2912           3 :                         if (pdu->hdr.common.plen != plen) {
    2913           3 :                                 tcp_req->has_in_capsule_data = true;
    2914             :                         } else {
    2915             :                                 /* Data is transmitted by C2H PDUs */
    2916           0 :                                 nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
    2917             :                         }
    2918             : 
    2919           3 :                         nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_NEED_BUFFER);
    2920           3 :                         STAILQ_INSERT_TAIL(&group->pending_buf_queue, &tcp_req->req, buf_link);
    2921           3 :                         break;
    2922           3 :                 case TCP_REQUEST_STATE_NEED_BUFFER:
    2923           3 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_NEED_BUFFER, tqpair->qpair.qid, 0, (uintptr_t)tcp_req,
    2924             :                                           tqpair);
    2925             : 
    2926           3 :                         assert(tcp_req->req.xfer != SPDK_NVME_DATA_NONE);
    2927             : 
    2928           3 :                         if (!tcp_req->has_in_capsule_data && (&tcp_req->req != STAILQ_FIRST(&group->pending_buf_queue))) {
    2929           0 :                                 SPDK_DEBUGLOG(nvmf_tcp,
    2930             :                                               "Not the first element to wait for the buf for tcp_req(%p) on tqpair=%p\n",
    2931             :                                               tcp_req, tqpair);
    2932             :                                 /* This request needs to wait in line to obtain a buffer */
    2933           0 :                                 break;
    2934             :                         }
    2935             : 
    2936             :                         /* Try to get a data buffer */
    2937           3 :                         if (nvmf_tcp_req_parse_sgl(tcp_req, transport, group) < 0) {
    2938           1 :                                 break;
    2939             :                         }
    2940             : 
    2941             :                         /* Get a zcopy buffer if the request can be serviced through zcopy */
    2942           2 :                         if (spdk_nvmf_request_using_zcopy(&tcp_req->req)) {
    2943           0 :                                 if (spdk_unlikely(tcp_req->req.dif_enabled)) {
    2944           0 :                                         assert(tcp_req->req.dif.elba_length >= tcp_req->req.length);
    2945           0 :                                         tcp_req->req.length = tcp_req->req.dif.elba_length;
    2946             :                                 }
    2947             : 
    2948           0 :                                 STAILQ_REMOVE(&group->pending_buf_queue, &tcp_req->req, spdk_nvmf_request, buf_link);
    2949           0 :                                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_AWAITING_ZCOPY_START);
    2950           0 :                                 spdk_nvmf_request_zcopy_start(&tcp_req->req);
    2951           0 :                                 break;
    2952             :                         }
    2953             : 
    2954           2 :                         if (tcp_req->req.iovcnt < 1) {
    2955           1 :                                 SPDK_DEBUGLOG(nvmf_tcp, "No buffer allocated for tcp_req(%p) on tqpair(%p\n)",
    2956             :                                               tcp_req, tqpair);
    2957             :                                 /* No buffers available. */
    2958           1 :                                 break;
    2959             :                         }
    2960             : 
    2961           1 :                         STAILQ_REMOVE(&group->pending_buf_queue, &tcp_req->req, spdk_nvmf_request, buf_link);
    2962             : 
    2963             :                         /* If data is transferring from host to controller, we need to do a transfer from the host. */
    2964           1 :                         if (tcp_req->req.xfer == SPDK_NVME_DATA_HOST_TO_CONTROLLER) {
    2965           1 :                                 if (tcp_req->req.data_from_pool) {
    2966           0 :                                         SPDK_DEBUGLOG(nvmf_tcp, "Sending R2T for tcp_req(%p) on tqpair=%p\n", tcp_req, tqpair);
    2967           0 :                                         nvmf_tcp_send_r2t_pdu(tqpair, tcp_req);
    2968             :                                 } else {
    2969             :                                         struct nvme_tcp_pdu *pdu;
    2970             : 
    2971           1 :                                         nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER);
    2972             : 
    2973           1 :                                         pdu = tqpair->pdu_in_progress;
    2974           1 :                                         SPDK_DEBUGLOG(nvmf_tcp, "Not need to send r2t for tcp_req(%p) on tqpair=%p\n", tcp_req,
    2975             :                                                       tqpair);
    2976             :                                         /* No need to send r2t, contained in the capsuled data */
    2977           1 :                                         nvme_tcp_pdu_set_data_buf(pdu, tcp_req->req.iov, tcp_req->req.iovcnt,
    2978             :                                                                   0, tcp_req->req.length);
    2979           1 :                                         nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD);
    2980             :                                 }
    2981           1 :                                 break;
    2982             :                         }
    2983             : 
    2984           0 :                         nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_EXECUTE);
    2985           0 :                         break;
    2986           0 :                 case TCP_REQUEST_STATE_AWAITING_ZCOPY_START:
    2987           0 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_AWAIT_ZCOPY_START, tqpair->qpair.qid, 0,
    2988             :                                           (uintptr_t)tcp_req, tqpair);
    2989             :                         /* Some external code must kick a request into  TCP_REQUEST_STATE_ZCOPY_START_COMPLETED
    2990             :                          * to escape this state. */
    2991           0 :                         break;
    2992           0 :                 case TCP_REQUEST_STATE_ZCOPY_START_COMPLETED:
    2993           0 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_ZCOPY_START_COMPLETED, tqpair->qpair.qid, 0,
    2994             :                                           (uintptr_t)tcp_req, tqpair);
    2995           0 :                         if (spdk_unlikely(spdk_nvme_cpl_is_error(&tcp_req->req.rsp->nvme_cpl))) {
    2996           0 :                                 SPDK_DEBUGLOG(nvmf_tcp, "Zero-copy start failed for tcp_req(%p) on tqpair=%p\n",
    2997             :                                               tcp_req, tqpair);
    2998           0 :                                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_COMPLETE);
    2999           0 :                                 break;
    3000             :                         }
    3001           0 :                         if (tcp_req->req.xfer == SPDK_NVME_DATA_HOST_TO_CONTROLLER) {
    3002           0 :                                 SPDK_DEBUGLOG(nvmf_tcp, "Sending R2T for tcp_req(%p) on tqpair=%p\n", tcp_req, tqpair);
    3003           0 :                                 nvmf_tcp_send_r2t_pdu(tqpair, tcp_req);
    3004             :                         } else {
    3005           0 :                                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_EXECUTED);
    3006             :                         }
    3007           0 :                         break;
    3008           0 :                 case TCP_REQUEST_STATE_AWAITING_R2T_ACK:
    3009           0 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_AWAIT_R2T_ACK, tqpair->qpair.qid, 0, (uintptr_t)tcp_req,
    3010             :                                           tqpair);
    3011             :                         /* The R2T completion or the h2c data incoming will kick it out of this state. */
    3012           0 :                         break;
    3013           1 :                 case TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER:
    3014             : 
    3015           1 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER, tqpair->qpair.qid, 0,
    3016             :                                           (uintptr_t)tcp_req, tqpair);
    3017             :                         /* Some external code must kick a request into TCP_REQUEST_STATE_READY_TO_EXECUTE
    3018             :                          * to escape this state. */
    3019           1 :                         break;
    3020           0 :                 case TCP_REQUEST_STATE_READY_TO_EXECUTE:
    3021           0 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_READY_TO_EXECUTE, tqpair->qpair.qid, 0,
    3022             :                                           (uintptr_t)tcp_req, tqpair);
    3023             : 
    3024           0 :                         if (spdk_unlikely(tcp_req->req.dif_enabled)) {
    3025           0 :                                 assert(tcp_req->req.dif.elba_length >= tcp_req->req.length);
    3026           0 :                                 tcp_req->req.length = tcp_req->req.dif.elba_length;
    3027             :                         }
    3028             : 
    3029           0 :                         if (tcp_req->cmd.fuse != SPDK_NVME_CMD_FUSE_NONE) {
    3030           0 :                                 if (tcp_req->fused_failed) {
    3031             :                                         /* This request failed FUSED semantics.  Fail it immediately, without
    3032             :                                          * even sending it to the target layer.
    3033             :                                          */
    3034           0 :                                         nvmf_tcp_req_set_cpl(tcp_req, SPDK_NVME_SCT_GENERIC, SPDK_NVME_SC_ABORTED_MISSING_FUSED);
    3035           0 :                                         nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_COMPLETE);
    3036           0 :                                         break;
    3037             :                                 }
    3038             : 
    3039           0 :                                 if (tcp_req->fused_pair == NULL ||
    3040           0 :                                     tcp_req->fused_pair->state != TCP_REQUEST_STATE_READY_TO_EXECUTE) {
    3041             :                                         /* This request is ready to execute, but either we don't know yet if it's
    3042             :                                          * valid - i.e. this is a FIRST but we haven't received the next request yet),
    3043             :                                          * or the other request of this fused pair isn't ready to execute. So
    3044             :                                          * break here and this request will get processed later either when the
    3045             :                                          * other request is ready or we find that this request isn't valid.
    3046             :                                          */
    3047             :                                         break;
    3048             :                                 }
    3049             :                         }
    3050             : 
    3051           0 :                         if (!spdk_nvmf_request_using_zcopy(&tcp_req->req)) {
    3052           0 :                                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_EXECUTING);
    3053             :                                 /* If we get to this point, and this request is a fused command, we know that
    3054             :                                  * it is part of a valid sequence (FIRST followed by a SECOND) and that both
    3055             :                                  * requests are READY_TO_EXECUTE.  So call spdk_nvmf_request_exec() both on this
    3056             :                                  * request, and the other request of the fused pair, in the correct order.
    3057             :                                  * Also clear the ->fused_pair pointers on both requests, since after this point
    3058             :                                  * we no longer need to maintain the relationship between these two requests.
    3059             :                                  */
    3060           0 :                                 if (tcp_req->cmd.fuse == SPDK_NVME_CMD_FUSE_SECOND) {
    3061           0 :                                         assert(tcp_req->fused_pair != NULL);
    3062           0 :                                         assert(tcp_req->fused_pair->fused_pair == tcp_req);
    3063           0 :                                         nvmf_tcp_req_set_state(tcp_req->fused_pair, TCP_REQUEST_STATE_EXECUTING);
    3064           0 :                                         spdk_nvmf_request_exec(&tcp_req->fused_pair->req);
    3065           0 :                                         tcp_req->fused_pair->fused_pair = NULL;
    3066           0 :                                         tcp_req->fused_pair = NULL;
    3067             :                                 }
    3068           0 :                                 spdk_nvmf_request_exec(&tcp_req->req);
    3069           0 :                                 if (tcp_req->cmd.fuse == SPDK_NVME_CMD_FUSE_FIRST) {
    3070           0 :                                         assert(tcp_req->fused_pair != NULL);
    3071           0 :                                         assert(tcp_req->fused_pair->fused_pair == tcp_req);
    3072           0 :                                         nvmf_tcp_req_set_state(tcp_req->fused_pair, TCP_REQUEST_STATE_EXECUTING);
    3073           0 :                                         spdk_nvmf_request_exec(&tcp_req->fused_pair->req);
    3074           0 :                                         tcp_req->fused_pair->fused_pair = NULL;
    3075           0 :                                         tcp_req->fused_pair = NULL;
    3076             :                                 }
    3077             :                         } else {
    3078             :                                 /* For zero-copy, only requests with data coming from host to the
    3079             :                                  * controller can end up here. */
    3080           0 :                                 assert(tcp_req->req.xfer == SPDK_NVME_DATA_HOST_TO_CONTROLLER);
    3081           0 :                                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_AWAITING_ZCOPY_COMMIT);
    3082           0 :                                 spdk_nvmf_request_zcopy_end(&tcp_req->req, true);
    3083             :                         }
    3084             : 
    3085           0 :                         break;
    3086           0 :                 case TCP_REQUEST_STATE_EXECUTING:
    3087           0 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_EXECUTING, tqpair->qpair.qid, 0, (uintptr_t)tcp_req,
    3088             :                                           tqpair);
    3089             :                         /* Some external code must kick a request into TCP_REQUEST_STATE_EXECUTED
    3090             :                          * to escape this state. */
    3091           0 :                         break;
    3092           0 :                 case TCP_REQUEST_STATE_AWAITING_ZCOPY_COMMIT:
    3093           0 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_AWAIT_ZCOPY_COMMIT, tqpair->qpair.qid, 0,
    3094             :                                           (uintptr_t)tcp_req, tqpair);
    3095             :                         /* Some external code must kick a request into TCP_REQUEST_STATE_EXECUTED
    3096             :                          * to escape this state. */
    3097           0 :                         break;
    3098           0 :                 case TCP_REQUEST_STATE_EXECUTED:
    3099           0 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_EXECUTED, tqpair->qpair.qid, 0, (uintptr_t)tcp_req,
    3100             :                                           tqpair);
    3101             : 
    3102           0 :                         if (spdk_unlikely(tcp_req->req.dif_enabled)) {
    3103           0 :                                 tcp_req->req.length = tcp_req->req.dif.orig_length;
    3104             :                         }
    3105             : 
    3106           0 :                         nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_READY_TO_COMPLETE);
    3107           0 :                         break;
    3108           1 :                 case TCP_REQUEST_STATE_READY_TO_COMPLETE:
    3109           1 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_READY_TO_COMPLETE, tqpair->qpair.qid, 0,
    3110             :                                           (uintptr_t)tcp_req, tqpair);
    3111           1 :                         if (request_transfer_out(&tcp_req->req) != 0) {
    3112           0 :                                 assert(0); /* No good way to handle this currently */
    3113             :                         }
    3114           1 :                         break;
    3115           1 :                 case TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST:
    3116           1 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST, tqpair->qpair.qid, 0,
    3117             :                                           (uintptr_t)tcp_req, tqpair);
    3118             :                         /* Some external code must kick a request into TCP_REQUEST_STATE_COMPLETED
    3119             :                          * to escape this state. */
    3120           1 :                         break;
    3121           0 :                 case TCP_REQUEST_STATE_AWAITING_ZCOPY_RELEASE:
    3122           0 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_AWAIT_ZCOPY_RELEASE, tqpair->qpair.qid, 0,
    3123             :                                           (uintptr_t)tcp_req, tqpair);
    3124             :                         /* Some external code must kick a request into TCP_REQUEST_STATE_COMPLETED
    3125             :                          * to escape this state. */
    3126           0 :                         break;
    3127           0 :                 case TCP_REQUEST_STATE_COMPLETED:
    3128           0 :                         spdk_trace_record(TRACE_TCP_REQUEST_STATE_COMPLETED, tqpair->qpair.qid, 0, (uintptr_t)tcp_req,
    3129             :                                           tqpair);
    3130             :                         /* If there's an outstanding PDU sent to the host, the request is completed
    3131             :                          * due to the qpair being disconnected.  We must delay the completion until
    3132             :                          * that write is done to avoid freeing the request twice. */
    3133           0 :                         if (spdk_unlikely(tcp_req->pdu_in_use)) {
    3134           0 :                                 SPDK_DEBUGLOG(nvmf_tcp, "Delaying completion due to outstanding "
    3135             :                                               "write on req=%p\n", tcp_req);
    3136             :                                 /* This can only happen for zcopy requests */
    3137           0 :                                 assert(spdk_nvmf_request_using_zcopy(&tcp_req->req));
    3138           0 :                                 assert(tqpair->qpair.state != SPDK_NVMF_QPAIR_ACTIVE);
    3139           0 :                                 break;
    3140             :                         }
    3141             : 
    3142           0 :                         if (tcp_req->req.data_from_pool) {
    3143           0 :                                 spdk_nvmf_request_free_buffers(&tcp_req->req, group, transport);
    3144           0 :                         } else if (spdk_unlikely(tcp_req->has_in_capsule_data &&
    3145             :                                                  (tcp_req->cmd.opc == SPDK_NVME_OPC_FABRIC ||
    3146             :                                                   tqpair->qpair.qid == 0) && tcp_req->req.length > transport->opts.in_capsule_data_size)) {
    3147           0 :                                 tgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_tcp_poll_group, group);
    3148           0 :                                 assert(tgroup->control_msg_list);
    3149           0 :                                 SPDK_DEBUGLOG(nvmf_tcp, "Put buf to control msg list\n");
    3150           0 :                                 nvmf_tcp_control_msg_put(tgroup->control_msg_list,
    3151             :                                                          tcp_req->req.iov[0].iov_base);
    3152           0 :                         } else if (tcp_req->req.zcopy_bdev_io != NULL) {
    3153             :                                 /* If the request has an unreleased zcopy bdev_io, it's either a
    3154             :                                  * read, a failed write, or the qpair is being disconnected */
    3155           0 :                                 assert(spdk_nvmf_request_using_zcopy(&tcp_req->req));
    3156           0 :                                 assert(tcp_req->req.xfer == SPDK_NVME_DATA_CONTROLLER_TO_HOST ||
    3157             :                                        spdk_nvme_cpl_is_error(&tcp_req->req.rsp->nvme_cpl) ||
    3158             :                                        tqpair->qpair.state != SPDK_NVMF_QPAIR_ACTIVE);
    3159           0 :                                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_AWAITING_ZCOPY_RELEASE);
    3160           0 :                                 spdk_nvmf_request_zcopy_end(&tcp_req->req, false);
    3161           0 :                                 break;
    3162             :                         }
    3163           0 :                         tcp_req->req.length = 0;
    3164           0 :                         tcp_req->req.iovcnt = 0;
    3165           0 :                         tcp_req->fused_failed = false;
    3166           0 :                         if (tcp_req->fused_pair) {
    3167             :                                 /* This req was part of a valid fused pair, but failed before it got to
    3168             :                                  * READ_TO_EXECUTE state.  This means we need to fail the other request
    3169             :                                  * in the pair, because it is no longer part of a valid pair.  If the pair
    3170             :                                  * already reached READY_TO_EXECUTE state, we need to kick it.
    3171             :                                  */
    3172           0 :                                 tcp_req->fused_pair->fused_failed = true;
    3173           0 :                                 if (tcp_req->fused_pair->state == TCP_REQUEST_STATE_READY_TO_EXECUTE) {
    3174           0 :                                         nvmf_tcp_req_process(ttransport, tcp_req->fused_pair);
    3175             :                                 }
    3176           0 :                                 tcp_req->fused_pair = NULL;
    3177             :                         }
    3178             : 
    3179           0 :                         nvmf_tcp_req_put(tqpair, tcp_req);
    3180           0 :                         break;
    3181           0 :                 case TCP_REQUEST_NUM_STATES:
    3182             :                 default:
    3183           0 :                         assert(0);
    3184             :                         break;
    3185             :                 }
    3186             : 
    3187          10 :                 if (tcp_req->state != prev_state) {
    3188           6 :                         progress = true;
    3189             :                 }
    3190          10 :         } while (tcp_req->state != prev_state);
    3191             : 
    3192           4 :         return progress;
    3193             : }
    3194             : 
    3195             : static void
    3196           0 : nvmf_tcp_sock_cb(void *arg, struct spdk_sock_group *group, struct spdk_sock *sock)
    3197             : {
    3198           0 :         struct spdk_nvmf_tcp_qpair *tqpair = arg;
    3199             :         int rc;
    3200             : 
    3201           0 :         assert(tqpair != NULL);
    3202           0 :         rc = nvmf_tcp_sock_process(tqpair);
    3203             : 
    3204             :         /* If there was a new socket error, disconnect */
    3205           0 :         if (rc < 0) {
    3206           0 :                 nvmf_tcp_qpair_disconnect(tqpair);
    3207             :         }
    3208           0 : }
    3209             : 
    3210             : static int
    3211           0 : nvmf_tcp_poll_group_add(struct spdk_nvmf_transport_poll_group *group,
    3212             :                         struct spdk_nvmf_qpair *qpair)
    3213             : {
    3214             :         struct spdk_nvmf_tcp_poll_group *tgroup;
    3215             :         struct spdk_nvmf_tcp_qpair      *tqpair;
    3216             :         int                             rc;
    3217             : 
    3218           0 :         tgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_tcp_poll_group, group);
    3219           0 :         tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
    3220             : 
    3221           0 :         rc =  nvmf_tcp_qpair_sock_init(tqpair);
    3222           0 :         if (rc != 0) {
    3223           0 :                 SPDK_ERRLOG("Cannot set sock opt for tqpair=%p\n", tqpair);
    3224           0 :                 return -1;
    3225             :         }
    3226             : 
    3227           0 :         rc = nvmf_tcp_qpair_init(&tqpair->qpair);
    3228           0 :         if (rc < 0) {
    3229           0 :                 SPDK_ERRLOG("Cannot init tqpair=%p\n", tqpair);
    3230           0 :                 return -1;
    3231             :         }
    3232             : 
    3233           0 :         rc = nvmf_tcp_qpair_init_mem_resource(tqpair);
    3234           0 :         if (rc < 0) {
    3235           0 :                 SPDK_ERRLOG("Cannot init memory resource info for tqpair=%p\n", tqpair);
    3236           0 :                 return -1;
    3237             :         }
    3238             : 
    3239           0 :         rc = spdk_sock_group_add_sock(tgroup->sock_group, tqpair->sock,
    3240             :                                       nvmf_tcp_sock_cb, tqpair);
    3241           0 :         if (rc != 0) {
    3242           0 :                 SPDK_ERRLOG("Could not add sock to sock_group: %s (%d)\n",
    3243             :                             spdk_strerror(errno), errno);
    3244           0 :                 return -1;
    3245             :         }
    3246             : 
    3247           0 :         tqpair->group = tgroup;
    3248           0 :         nvmf_tcp_qpair_set_state(tqpair, NVME_TCP_QPAIR_STATE_INVALID);
    3249           0 :         TAILQ_INSERT_TAIL(&tgroup->qpairs, tqpair, link);
    3250             : 
    3251           0 :         return 0;
    3252             : }
    3253             : 
    3254             : static int
    3255           0 : nvmf_tcp_poll_group_remove(struct spdk_nvmf_transport_poll_group *group,
    3256             :                            struct spdk_nvmf_qpair *qpair)
    3257             : {
    3258             :         struct spdk_nvmf_tcp_poll_group *tgroup;
    3259             :         struct spdk_nvmf_tcp_qpair              *tqpair;
    3260             :         int                             rc;
    3261             : 
    3262           0 :         tgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_tcp_poll_group, group);
    3263           0 :         tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
    3264             : 
    3265           0 :         assert(tqpair->group == tgroup);
    3266             : 
    3267           0 :         SPDK_DEBUGLOG(nvmf_tcp, "remove tqpair=%p from the tgroup=%p\n", tqpair, tgroup);
    3268           0 :         if (tqpair->recv_state == NVME_TCP_PDU_RECV_STATE_AWAIT_REQ) {
    3269             :                 /* Change the state to move the qpair from the await_req list to the main list
    3270             :                  * and prevent adding it again later by nvmf_tcp_qpair_set_recv_state() */
    3271           0 :                 nvmf_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_QUIESCING);
    3272             :         }
    3273           0 :         TAILQ_REMOVE(&tgroup->qpairs, tqpair, link);
    3274             : 
    3275           0 :         rc = spdk_sock_group_remove_sock(tgroup->sock_group, tqpair->sock);
    3276           0 :         if (rc != 0) {
    3277           0 :                 SPDK_ERRLOG("Could not remove sock from sock_group: %s (%d)\n",
    3278             :                             spdk_strerror(errno), errno);
    3279             :         }
    3280             : 
    3281           0 :         return rc;
    3282             : }
    3283             : 
    3284             : static int
    3285           0 : nvmf_tcp_req_complete(struct spdk_nvmf_request *req)
    3286             : {
    3287             :         struct spdk_nvmf_tcp_transport *ttransport;
    3288             :         struct spdk_nvmf_tcp_req *tcp_req;
    3289             : 
    3290           0 :         ttransport = SPDK_CONTAINEROF(req->qpair->transport, struct spdk_nvmf_tcp_transport, transport);
    3291           0 :         tcp_req = SPDK_CONTAINEROF(req, struct spdk_nvmf_tcp_req, req);
    3292             : 
    3293           0 :         switch (tcp_req->state) {
    3294           0 :         case TCP_REQUEST_STATE_EXECUTING:
    3295             :         case TCP_REQUEST_STATE_AWAITING_ZCOPY_COMMIT:
    3296           0 :                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_EXECUTED);
    3297           0 :                 break;
    3298           0 :         case TCP_REQUEST_STATE_AWAITING_ZCOPY_START:
    3299           0 :                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_ZCOPY_START_COMPLETED);
    3300           0 :                 break;
    3301           0 :         case TCP_REQUEST_STATE_AWAITING_ZCOPY_RELEASE:
    3302           0 :                 nvmf_tcp_req_set_state(tcp_req, TCP_REQUEST_STATE_COMPLETED);
    3303           0 :                 break;
    3304           0 :         default:
    3305           0 :                 assert(0 && "Unexpected request state");
    3306             :                 break;
    3307             :         }
    3308             : 
    3309           0 :         nvmf_tcp_req_process(ttransport, tcp_req);
    3310             : 
    3311           0 :         return 0;
    3312             : }
    3313             : 
    3314             : static void
    3315           0 : nvmf_tcp_close_qpair(struct spdk_nvmf_qpair *qpair,
    3316             :                      spdk_nvmf_transport_qpair_fini_cb cb_fn, void *cb_arg)
    3317             : {
    3318             :         struct spdk_nvmf_tcp_qpair *tqpair;
    3319             : 
    3320           0 :         SPDK_DEBUGLOG(nvmf_tcp, "Qpair: %p\n", qpair);
    3321             : 
    3322           0 :         tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
    3323             : 
    3324           0 :         assert(tqpair->fini_cb_fn == NULL);
    3325           0 :         tqpair->fini_cb_fn = cb_fn;
    3326           0 :         tqpair->fini_cb_arg = cb_arg;
    3327             : 
    3328           0 :         nvmf_tcp_qpair_set_state(tqpair, NVME_TCP_QPAIR_STATE_EXITED);
    3329           0 :         nvmf_tcp_qpair_destroy(tqpair);
    3330           0 : }
    3331             : 
    3332             : static int
    3333           0 : nvmf_tcp_poll_group_poll(struct spdk_nvmf_transport_poll_group *group)
    3334             : {
    3335             :         struct spdk_nvmf_tcp_poll_group *tgroup;
    3336             :         int rc;
    3337             :         struct spdk_nvmf_request *req, *req_tmp;
    3338             :         struct spdk_nvmf_tcp_req *tcp_req;
    3339             :         struct spdk_nvmf_tcp_qpair *tqpair, *tqpair_tmp;
    3340           0 :         struct spdk_nvmf_tcp_transport *ttransport = SPDK_CONTAINEROF(group->transport,
    3341             :                         struct spdk_nvmf_tcp_transport, transport);
    3342             : 
    3343           0 :         tgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_tcp_poll_group, group);
    3344             : 
    3345           0 :         if (spdk_unlikely(TAILQ_EMPTY(&tgroup->qpairs) && TAILQ_EMPTY(&tgroup->await_req))) {
    3346           0 :                 return 0;
    3347             :         }
    3348             : 
    3349           0 :         STAILQ_FOREACH_SAFE(req, &group->pending_buf_queue, buf_link, req_tmp) {
    3350           0 :                 tcp_req = SPDK_CONTAINEROF(req, struct spdk_nvmf_tcp_req, req);
    3351           0 :                 if (nvmf_tcp_req_process(ttransport, tcp_req) == false) {
    3352           0 :                         break;
    3353             :                 }
    3354             :         }
    3355             : 
    3356           0 :         rc = spdk_sock_group_poll(tgroup->sock_group);
    3357           0 :         if (rc < 0) {
    3358           0 :                 SPDK_ERRLOG("Failed to poll sock_group=%p\n", tgroup->sock_group);
    3359             :         }
    3360             : 
    3361           0 :         TAILQ_FOREACH_SAFE(tqpair, &tgroup->await_req, link, tqpair_tmp) {
    3362           0 :                 rc = nvmf_tcp_sock_process(tqpair);
    3363             : 
    3364             :                 /* If there was a new socket error, disconnect */
    3365           0 :                 if (rc < 0) {
    3366           0 :                         nvmf_tcp_qpair_disconnect(tqpair);
    3367             :                 }
    3368             :         }
    3369             : 
    3370           0 :         return rc;
    3371             : }
    3372             : 
    3373             : static int
    3374           0 : nvmf_tcp_qpair_get_trid(struct spdk_nvmf_qpair *qpair,
    3375             :                         struct spdk_nvme_transport_id *trid, bool peer)
    3376             : {
    3377             :         struct spdk_nvmf_tcp_qpair     *tqpair;
    3378             :         uint16_t                        port;
    3379             : 
    3380           0 :         tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
    3381           0 :         spdk_nvme_trid_populate_transport(trid, SPDK_NVME_TRANSPORT_TCP);
    3382             : 
    3383           0 :         if (peer) {
    3384           0 :                 snprintf(trid->traddr, sizeof(trid->traddr), "%s", tqpair->initiator_addr);
    3385           0 :                 port = tqpair->initiator_port;
    3386             :         } else {
    3387           0 :                 snprintf(trid->traddr, sizeof(trid->traddr), "%s", tqpair->target_addr);
    3388           0 :                 port = tqpair->target_port;
    3389             :         }
    3390             : 
    3391           0 :         if (spdk_sock_is_ipv4(tqpair->sock)) {
    3392           0 :                 trid->adrfam = SPDK_NVMF_ADRFAM_IPV4;
    3393           0 :         } else if (spdk_sock_is_ipv6(tqpair->sock)) {
    3394           0 :                 trid->adrfam = SPDK_NVMF_ADRFAM_IPV6;
    3395             :         } else {
    3396           0 :                 return -1;
    3397             :         }
    3398             : 
    3399           0 :         snprintf(trid->trsvcid, sizeof(trid->trsvcid), "%d", port);
    3400           0 :         return 0;
    3401             : }
    3402             : 
    3403             : static int
    3404           0 : nvmf_tcp_qpair_get_local_trid(struct spdk_nvmf_qpair *qpair,
    3405             :                               struct spdk_nvme_transport_id *trid)
    3406             : {
    3407           0 :         return nvmf_tcp_qpair_get_trid(qpair, trid, 0);
    3408             : }
    3409             : 
    3410             : static int
    3411           0 : nvmf_tcp_qpair_get_peer_trid(struct spdk_nvmf_qpair *qpair,
    3412             :                              struct spdk_nvme_transport_id *trid)
    3413             : {
    3414           0 :         return nvmf_tcp_qpair_get_trid(qpair, trid, 1);
    3415             : }
    3416             : 
    3417             : static int
    3418           0 : nvmf_tcp_qpair_get_listen_trid(struct spdk_nvmf_qpair *qpair,
    3419             :                                struct spdk_nvme_transport_id *trid)
    3420             : {
    3421           0 :         return nvmf_tcp_qpair_get_trid(qpair, trid, 0);
    3422             : }
    3423             : 
    3424             : static void
    3425           0 : nvmf_tcp_req_set_abort_status(struct spdk_nvmf_request *req,
    3426             :                               struct spdk_nvmf_tcp_req *tcp_req_to_abort)
    3427             : {
    3428           0 :         nvmf_tcp_req_set_cpl(tcp_req_to_abort, SPDK_NVME_SCT_GENERIC, SPDK_NVME_SC_ABORTED_BY_REQUEST);
    3429           0 :         nvmf_tcp_req_set_state(tcp_req_to_abort, TCP_REQUEST_STATE_READY_TO_COMPLETE);
    3430             : 
    3431           0 :         req->rsp->nvme_cpl.cdw0 &= ~1U; /* Command was successfully aborted. */
    3432           0 : }
    3433             : 
    3434             : static int
    3435           0 : _nvmf_tcp_qpair_abort_request(void *ctx)
    3436             : {
    3437           0 :         struct spdk_nvmf_request *req = ctx;
    3438           0 :         struct spdk_nvmf_tcp_req *tcp_req_to_abort = SPDK_CONTAINEROF(req->req_to_abort,
    3439             :                         struct spdk_nvmf_tcp_req, req);
    3440           0 :         struct spdk_nvmf_tcp_qpair *tqpair = SPDK_CONTAINEROF(req->req_to_abort->qpair,
    3441             :                                              struct spdk_nvmf_tcp_qpair, qpair);
    3442           0 :         struct spdk_nvmf_tcp_transport *ttransport = SPDK_CONTAINEROF(tqpair->qpair.transport,
    3443             :                         struct spdk_nvmf_tcp_transport, transport);
    3444             :         int rc;
    3445             : 
    3446           0 :         spdk_poller_unregister(&req->poller);
    3447             : 
    3448           0 :         switch (tcp_req_to_abort->state) {
    3449           0 :         case TCP_REQUEST_STATE_EXECUTING:
    3450             :         case TCP_REQUEST_STATE_AWAITING_ZCOPY_START:
    3451             :         case TCP_REQUEST_STATE_AWAITING_ZCOPY_COMMIT:
    3452           0 :                 rc = nvmf_ctrlr_abort_request(req);
    3453           0 :                 if (rc == SPDK_NVMF_REQUEST_EXEC_STATUS_ASYNCHRONOUS) {
    3454           0 :                         return SPDK_POLLER_BUSY;
    3455             :                 }
    3456           0 :                 break;
    3457             : 
    3458           0 :         case TCP_REQUEST_STATE_NEED_BUFFER:
    3459           0 :                 STAILQ_REMOVE(&tqpair->group->group.pending_buf_queue,
    3460             :                               &tcp_req_to_abort->req, spdk_nvmf_request, buf_link);
    3461             : 
    3462           0 :                 nvmf_tcp_req_set_abort_status(req, tcp_req_to_abort);
    3463           0 :                 nvmf_tcp_req_process(ttransport, tcp_req_to_abort);
    3464           0 :                 break;
    3465             : 
    3466           0 :         case TCP_REQUEST_STATE_AWAITING_R2T_ACK:
    3467             :         case TCP_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER:
    3468           0 :                 if (spdk_get_ticks() < req->timeout_tsc) {
    3469           0 :                         req->poller = SPDK_POLLER_REGISTER(_nvmf_tcp_qpair_abort_request, req, 0);
    3470           0 :                         return SPDK_POLLER_BUSY;
    3471             :                 }
    3472           0 :                 break;
    3473             : 
    3474           0 :         default:
    3475             :                 /* Requests in other states are either un-abortable (e.g.
    3476             :                  * TRANSFERRING_CONTROLLER_TO_HOST) or should never end up here, as they're
    3477             :                  * immediately transitioned to other states in nvmf_tcp_req_process() (e.g.
    3478             :                  * READY_TO_EXECUTE).  But it is fine to end up here, as we'll simply complete the
    3479             :                  * abort request with the bit0 of dword0 set (command not aborted).
    3480             :                  */
    3481           0 :                 break;
    3482             :         }
    3483             : 
    3484           0 :         spdk_nvmf_request_complete(req);
    3485           0 :         return SPDK_POLLER_BUSY;
    3486             : }
    3487             : 
    3488             : static void
    3489           0 : nvmf_tcp_qpair_abort_request(struct spdk_nvmf_qpair *qpair,
    3490             :                              struct spdk_nvmf_request *req)
    3491             : {
    3492             :         struct spdk_nvmf_tcp_qpair *tqpair;
    3493             :         struct spdk_nvmf_tcp_transport *ttransport;
    3494             :         struct spdk_nvmf_transport *transport;
    3495             :         uint16_t cid;
    3496             :         uint32_t i;
    3497           0 :         struct spdk_nvmf_tcp_req *tcp_req_to_abort = NULL;
    3498             : 
    3499           0 :         tqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_tcp_qpair, qpair);
    3500           0 :         ttransport = SPDK_CONTAINEROF(qpair->transport, struct spdk_nvmf_tcp_transport, transport);
    3501           0 :         transport = &ttransport->transport;
    3502             : 
    3503           0 :         cid = req->cmd->nvme_cmd.cdw10_bits.abort.cid;
    3504             : 
    3505           0 :         for (i = 0; i < tqpair->resource_count; i++) {
    3506           0 :                 if (tqpair->reqs[i].state != TCP_REQUEST_STATE_FREE &&
    3507           0 :                     tqpair->reqs[i].req.cmd->nvme_cmd.cid == cid) {
    3508           0 :                         tcp_req_to_abort = &tqpair->reqs[i];
    3509           0 :                         break;
    3510             :                 }
    3511             :         }
    3512             : 
    3513           0 :         spdk_trace_record(TRACE_TCP_QP_ABORT_REQ, qpair->qid, 0, (uintptr_t)req, tqpair);
    3514             : 
    3515           0 :         if (tcp_req_to_abort == NULL) {
    3516           0 :                 spdk_nvmf_request_complete(req);
    3517           0 :                 return;
    3518             :         }
    3519             : 
    3520           0 :         req->req_to_abort = &tcp_req_to_abort->req;
    3521           0 :         req->timeout_tsc = spdk_get_ticks() +
    3522           0 :                            transport->opts.abort_timeout_sec * spdk_get_ticks_hz();
    3523           0 :         req->poller = NULL;
    3524             : 
    3525           0 :         _nvmf_tcp_qpair_abort_request(req);
    3526             : }
    3527             : 
    3528             : struct tcp_subsystem_add_host_opts {
    3529             :         char *psk;
    3530             : };
    3531             : 
    3532             : static const struct spdk_json_object_decoder tcp_subsystem_add_host_opts_decoder[] = {
    3533             :         {"psk", offsetof(struct tcp_subsystem_add_host_opts, psk), spdk_json_decode_string, true},
    3534             : };
    3535             : 
    3536             : static int
    3537           1 : tcp_load_psk(const char *fname, char *buf, size_t bufsz)
    3538             : {
    3539             :         FILE *psk_file;
    3540           1 :         struct stat statbuf;
    3541             :         int rc;
    3542             : 
    3543           1 :         if (stat(fname, &statbuf) != 0) {
    3544           0 :                 SPDK_ERRLOG("Could not read permissions for PSK file\n");
    3545           0 :                 return -EACCES;
    3546             :         }
    3547             : 
    3548           1 :         if ((statbuf.st_mode & TCP_PSK_INVALID_PERMISSIONS) != 0) {
    3549           0 :                 SPDK_ERRLOG("Incorrect permissions for PSK file\n");
    3550           0 :                 return -EPERM;
    3551             :         }
    3552           1 :         if ((size_t)statbuf.st_size >= bufsz) {
    3553           0 :                 SPDK_ERRLOG("Invalid PSK: too long\n");
    3554           0 :                 return -EINVAL;
    3555             :         }
    3556           1 :         psk_file = fopen(fname, "r");
    3557           1 :         if (psk_file == NULL) {
    3558           0 :                 SPDK_ERRLOG("Could not open PSK file\n");
    3559           0 :                 return -EINVAL;
    3560             :         }
    3561             : 
    3562           1 :         memset(buf, 0, bufsz);
    3563           1 :         rc = fread(buf, 1, statbuf.st_size, psk_file);
    3564           1 :         if (rc != statbuf.st_size) {
    3565           0 :                 SPDK_ERRLOG("Failed to read PSK\n");
    3566           0 :                 fclose(psk_file);
    3567           0 :                 return -EINVAL;
    3568             :         }
    3569             : 
    3570           1 :         fclose(psk_file);
    3571           1 :         return 0;
    3572             : }
    3573             : 
    3574             : static int
    3575           1 : nvmf_tcp_subsystem_add_host(struct spdk_nvmf_transport *transport,
    3576             :                             const struct spdk_nvmf_subsystem *subsystem,
    3577             :                             const char *hostnqn,
    3578             :                             const struct spdk_json_val *transport_specific)
    3579             : {
    3580           1 :         struct tcp_subsystem_add_host_opts opts;
    3581             :         struct spdk_nvmf_tcp_transport *ttransport;
    3582             :         struct tcp_psk_entry *entry;
    3583           1 :         char psk_identity[NVMF_PSK_IDENTITY_LEN];
    3584           1 :         uint8_t psk_configured[SPDK_TLS_PSK_MAX_LEN] = {};
    3585           1 :         char psk_interchange[SPDK_TLS_PSK_MAX_LEN] = {};
    3586             :         uint8_t tls_cipher_suite;
    3587           1 :         int rc = 0;
    3588           1 :         uint8_t psk_retained_hash;
    3589           1 :         uint64_t psk_configured_size;
    3590             : 
    3591           1 :         if (transport_specific == NULL) {
    3592           0 :                 return 0;
    3593             :         }
    3594             : 
    3595           1 :         assert(transport != NULL);
    3596           1 :         assert(subsystem != NULL);
    3597             : 
    3598           1 :         memset(&opts, 0, sizeof(opts));
    3599             : 
    3600             :         /* Decode PSK file path */
    3601           1 :         if (spdk_json_decode_object_relaxed(transport_specific, tcp_subsystem_add_host_opts_decoder,
    3602             :                                             SPDK_COUNTOF(tcp_subsystem_add_host_opts_decoder), &opts)) {
    3603           0 :                 SPDK_ERRLOG("spdk_json_decode_object failed\n");
    3604           0 :                 return -EINVAL;
    3605             :         }
    3606             : 
    3607           1 :         if (opts.psk == NULL) {
    3608           0 :                 return 0;
    3609             :         }
    3610           1 :         if (strlen(opts.psk) >= sizeof(entry->psk)) {
    3611           0 :                 SPDK_ERRLOG("PSK path too long\n");
    3612           0 :                 rc = -EINVAL;
    3613           0 :                 goto end;
    3614             :         }
    3615             : 
    3616           1 :         rc = tcp_load_psk(opts.psk, psk_interchange, sizeof(psk_interchange));
    3617           1 :         if (rc) {
    3618           0 :                 SPDK_ERRLOG("Could not retrieve PSK from file\n");
    3619           0 :                 goto end;
    3620             :         }
    3621             : 
    3622             :         /* Parse PSK interchange to get length of base64 encoded data.
    3623             :          * This is then used to decide which cipher suite should be used
    3624             :          * to generate PSK identity and TLS PSK later on. */
    3625           1 :         rc = nvme_tcp_parse_interchange_psk(psk_interchange, psk_configured, sizeof(psk_configured),
    3626             :                                             &psk_configured_size, &psk_retained_hash);
    3627           1 :         if (rc < 0) {
    3628           0 :                 SPDK_ERRLOG("Failed to parse PSK interchange!\n");
    3629           0 :                 goto end;
    3630             :         }
    3631             : 
    3632             :         /* The Base64 string encodes the configured PSK (32 or 48 bytes binary).
    3633             :          * This check also ensures that psk_configured_size is smaller than
    3634             :          * psk_retained buffer size. */
    3635           1 :         if (psk_configured_size == SHA256_DIGEST_LENGTH) {
    3636           1 :                 tls_cipher_suite = NVME_TCP_CIPHER_AES_128_GCM_SHA256;
    3637           0 :         } else if (psk_configured_size == SHA384_DIGEST_LENGTH) {
    3638           0 :                 tls_cipher_suite = NVME_TCP_CIPHER_AES_256_GCM_SHA384;
    3639             :         } else {
    3640           0 :                 SPDK_ERRLOG("Unrecognized cipher suite!\n");
    3641           0 :                 rc = -EINVAL;
    3642           0 :                 goto end;
    3643             :         }
    3644             : 
    3645           1 :         ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
    3646             :         /* Generate PSK identity. */
    3647           1 :         rc = nvme_tcp_generate_psk_identity(psk_identity, NVMF_PSK_IDENTITY_LEN, hostnqn,
    3648           1 :                                             subsystem->subnqn, tls_cipher_suite);
    3649           1 :         if (rc) {
    3650           0 :                 rc = -EINVAL;
    3651           0 :                 goto end;
    3652             :         }
    3653             :         /* Check if PSK identity entry already exists. */
    3654           1 :         TAILQ_FOREACH(entry, &ttransport->psks, link) {
    3655           0 :                 if (strncmp(entry->psk_identity, psk_identity, NVMF_PSK_IDENTITY_LEN) == 0) {
    3656           0 :                         SPDK_ERRLOG("Given PSK identity: %s entry already exists!\n", psk_identity);
    3657           0 :                         rc = -EEXIST;
    3658           0 :                         goto end;
    3659             :                 }
    3660             :         }
    3661           1 :         entry = calloc(1, sizeof(struct tcp_psk_entry));
    3662           1 :         if (entry == NULL) {
    3663           0 :                 SPDK_ERRLOG("Unable to allocate memory for PSK entry!\n");
    3664           0 :                 rc = -ENOMEM;
    3665           0 :                 goto end;
    3666             :         }
    3667             : 
    3668           1 :         if (snprintf(entry->hostnqn, sizeof(entry->hostnqn), "%s", hostnqn) < 0) {
    3669           0 :                 SPDK_ERRLOG("Could not write hostnqn string!\n");
    3670           0 :                 rc = -EINVAL;
    3671           0 :                 free(entry);
    3672           0 :                 goto end;
    3673             :         }
    3674           1 :         if (snprintf(entry->subnqn, sizeof(entry->subnqn), "%s", subsystem->subnqn) < 0) {
    3675           0 :                 SPDK_ERRLOG("Could not write subnqn string!\n");
    3676           0 :                 rc = -EINVAL;
    3677           0 :                 free(entry);
    3678           0 :                 goto end;
    3679             :         }
    3680           1 :         if (snprintf(entry->psk_identity, sizeof(entry->psk_identity), "%s", psk_identity) < 0) {
    3681           0 :                 SPDK_ERRLOG("Could not write PSK identity string!\n");
    3682           0 :                 rc = -EINVAL;
    3683           0 :                 free(entry);
    3684           0 :                 goto end;
    3685             :         }
    3686           1 :         entry->tls_cipher_suite = tls_cipher_suite;
    3687             : 
    3688             :         /* No hash indicates that Configured PSK must be used as Retained PSK. */
    3689           1 :         if (psk_retained_hash == NVME_TCP_HASH_ALGORITHM_NONE) {
    3690             :                 /* Psk configured is either 32 or 48 bytes long. */
    3691           0 :                 memcpy(entry->psk, psk_configured, psk_configured_size);
    3692           0 :                 entry->psk_size = psk_configured_size;
    3693             :         } else {
    3694             :                 /* Derive retained PSK. */
    3695           1 :                 rc = nvme_tcp_derive_retained_psk(psk_configured, psk_configured_size, hostnqn, entry->psk,
    3696             :                                                   SPDK_TLS_PSK_MAX_LEN, psk_retained_hash);
    3697           1 :                 if (rc < 0) {
    3698           0 :                         SPDK_ERRLOG("Unable to derive retained PSK!\n");
    3699           0 :                         free(entry);
    3700           0 :                         goto end;
    3701             :                 }
    3702           1 :                 entry->psk_size = rc;
    3703             :         }
    3704             : 
    3705           1 :         rc = snprintf(entry->psk_path, sizeof(entry->psk_path), "%s", opts.psk);
    3706           1 :         if (rc < 0 || (size_t)rc >= sizeof(entry->psk_path)) {
    3707           0 :                 SPDK_ERRLOG("Could not save PSK path!\n");
    3708           0 :                 rc = -ENAMETOOLONG;
    3709           0 :                 free(entry);
    3710           0 :                 goto end;
    3711             :         }
    3712             : 
    3713           1 :         TAILQ_INSERT_TAIL(&ttransport->psks, entry, link);
    3714           1 :         rc = 0;
    3715             : 
    3716           1 : end:
    3717           1 :         spdk_memset_s(psk_configured, sizeof(psk_configured), 0, sizeof(psk_configured));
    3718           1 :         spdk_memset_s(psk_interchange, sizeof(psk_interchange), 0, sizeof(psk_interchange));
    3719             : 
    3720           1 :         free(opts.psk);
    3721             : 
    3722           1 :         return rc;
    3723             : }
    3724             : 
    3725             : static void
    3726           1 : nvmf_tcp_subsystem_remove_host(struct spdk_nvmf_transport *transport,
    3727             :                                const struct spdk_nvmf_subsystem *subsystem,
    3728             :                                const char *hostnqn)
    3729             : {
    3730             :         struct spdk_nvmf_tcp_transport *ttransport;
    3731             :         struct tcp_psk_entry *entry, *tmp;
    3732             : 
    3733           1 :         assert(transport != NULL);
    3734           1 :         assert(subsystem != NULL);
    3735             : 
    3736           1 :         ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
    3737           1 :         TAILQ_FOREACH_SAFE(entry, &ttransport->psks, link, tmp) {
    3738           1 :                 if ((strncmp(entry->hostnqn, hostnqn, SPDK_NVMF_NQN_MAX_LEN)) == 0 &&
    3739           1 :                     (strncmp(entry->subnqn, subsystem->subnqn, SPDK_NVMF_NQN_MAX_LEN)) == 0) {
    3740           1 :                         TAILQ_REMOVE(&ttransport->psks, entry, link);
    3741           1 :                         spdk_memset_s(entry->psk, sizeof(entry->psk), 0, sizeof(entry->psk));
    3742           1 :                         free(entry);
    3743           1 :                         break;
    3744             :                 }
    3745             :         }
    3746           1 : }
    3747             : 
    3748             : static void
    3749           0 : nvmf_tcp_subsystem_dump_host(struct spdk_nvmf_transport *transport,
    3750             :                              const struct spdk_nvmf_subsystem *subsystem, const char *hostnqn,
    3751             :                              struct spdk_json_write_ctx *w)
    3752             : {
    3753             :         struct spdk_nvmf_tcp_transport *ttransport;
    3754             :         struct tcp_psk_entry *entry;
    3755             : 
    3756           0 :         assert(transport != NULL);
    3757           0 :         assert(subsystem != NULL);
    3758             : 
    3759           0 :         ttransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_tcp_transport, transport);
    3760           0 :         TAILQ_FOREACH(entry, &ttransport->psks, link) {
    3761           0 :                 if ((strncmp(entry->hostnqn, hostnqn, SPDK_NVMF_NQN_MAX_LEN)) == 0 &&
    3762           0 :                     (strncmp(entry->subnqn, subsystem->subnqn, SPDK_NVMF_NQN_MAX_LEN)) == 0) {
    3763           0 :                         spdk_json_write_named_string(w, "psk", entry->psk_path);
    3764           0 :                         break;
    3765             :                 }
    3766             :         }
    3767           0 : }
    3768             : 
    3769             : static void
    3770           1 : nvmf_tcp_opts_init(struct spdk_nvmf_transport_opts *opts)
    3771             : {
    3772           1 :         opts->max_queue_depth =              SPDK_NVMF_TCP_DEFAULT_MAX_IO_QUEUE_DEPTH;
    3773           1 :         opts->max_qpairs_per_ctrlr = SPDK_NVMF_TCP_DEFAULT_MAX_QPAIRS_PER_CTRLR;
    3774           1 :         opts->in_capsule_data_size = SPDK_NVMF_TCP_DEFAULT_IN_CAPSULE_DATA_SIZE;
    3775           1 :         opts->max_io_size =          SPDK_NVMF_TCP_DEFAULT_MAX_IO_SIZE;
    3776           1 :         opts->io_unit_size =         SPDK_NVMF_TCP_DEFAULT_IO_UNIT_SIZE;
    3777           1 :         opts->max_aq_depth =         SPDK_NVMF_TCP_DEFAULT_MAX_ADMIN_QUEUE_DEPTH;
    3778           1 :         opts->num_shared_buffers =   SPDK_NVMF_TCP_DEFAULT_NUM_SHARED_BUFFERS;
    3779           1 :         opts->buf_cache_size =               SPDK_NVMF_TCP_DEFAULT_BUFFER_CACHE_SIZE;
    3780           1 :         opts->dif_insert_or_strip =  SPDK_NVMF_TCP_DEFAULT_DIF_INSERT_OR_STRIP;
    3781           1 :         opts->abort_timeout_sec =    SPDK_NVMF_TCP_DEFAULT_ABORT_TIMEOUT_SEC;
    3782           1 :         opts->transport_specific =      NULL;
    3783           1 : }
    3784             : 
    3785             : const struct spdk_nvmf_transport_ops spdk_nvmf_transport_tcp = {
    3786             :         .name = "TCP",
    3787             :         .type = SPDK_NVME_TRANSPORT_TCP,
    3788             :         .opts_init = nvmf_tcp_opts_init,
    3789             :         .create = nvmf_tcp_create,
    3790             :         .dump_opts = nvmf_tcp_dump_opts,
    3791             :         .destroy = nvmf_tcp_destroy,
    3792             : 
    3793             :         .listen = nvmf_tcp_listen,
    3794             :         .stop_listen = nvmf_tcp_stop_listen,
    3795             : 
    3796             :         .listener_discover = nvmf_tcp_discover,
    3797             : 
    3798             :         .poll_group_create = nvmf_tcp_poll_group_create,
    3799             :         .get_optimal_poll_group = nvmf_tcp_get_optimal_poll_group,
    3800             :         .poll_group_destroy = nvmf_tcp_poll_group_destroy,
    3801             :         .poll_group_add = nvmf_tcp_poll_group_add,
    3802             :         .poll_group_remove = nvmf_tcp_poll_group_remove,
    3803             :         .poll_group_poll = nvmf_tcp_poll_group_poll,
    3804             : 
    3805             :         .req_free = nvmf_tcp_req_free,
    3806             :         .req_complete = nvmf_tcp_req_complete,
    3807             : 
    3808             :         .qpair_fini = nvmf_tcp_close_qpair,
    3809             :         .qpair_get_local_trid = nvmf_tcp_qpair_get_local_trid,
    3810             :         .qpair_get_peer_trid = nvmf_tcp_qpair_get_peer_trid,
    3811             :         .qpair_get_listen_trid = nvmf_tcp_qpair_get_listen_trid,
    3812             :         .qpair_abort_request = nvmf_tcp_qpair_abort_request,
    3813             :         .subsystem_add_host = nvmf_tcp_subsystem_add_host,
    3814             :         .subsystem_remove_host = nvmf_tcp_subsystem_remove_host,
    3815             :         .subsystem_dump_host = nvmf_tcp_subsystem_dump_host,
    3816             : };
    3817             : 
    3818           1 : SPDK_NVMF_TRANSPORT_REGISTER(tcp, &spdk_nvmf_transport_tcp);
    3819           1 : SPDK_LOG_REGISTER_COMPONENT(nvmf_tcp)

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