drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_cm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2018 Chelsio Communications, Inc.
   4  *
   5  * Written by: Atul Gupta (atul.gupta@chelsio.com)
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/list.h>
  10 #include <linux/workqueue.h>
  11 #include <linux/skbuff.h>
  12 #include <linux/timer.h>
  13 #include <linux/notifier.h>
  14 #include <linux/inetdevice.h>
  15 #include <linux/ip.h>
  16 #include <linux/tcp.h>
  17 #include <linux/sched/signal.h>
  18 #include <linux/kallsyms.h>
  19 #include <linux/kprobes.h>
  20 #include <linux/if_vlan.h>
  21 #include <linux/ipv6.h>
  22 #include <net/ipv6.h>
  23 #include <net/transp_v6.h>
  24 #include <net/ip6_route.h>
  25 #include <net/inet_common.h>
  26 #include <net/tcp.h>
  27 #include <net/dst.h>
  28 #include <net/tls.h>
  29 #include <net/addrconf.h>
  30 #include <net/secure_seq.h>
  31
  32 #include "chtls.h"
  33 #include "chtls_cm.h"
  34 #include "clip_tbl.h"
  35 #include "t4_tcb.h"
  36
  37 /*
  38  * State transitions and actions for close.  Note that if we are in SYN_SENT
  39  * we remain in that state as we cannot control a connection while it's in
  40  * SYN_SENT; such connections are allowed to establish and are then aborted.
  41  */
  42 static unsigned char new_state[16] = {
  43         /* current state:     new state:      action: */
  44         /* (Invalid)       */ TCP_CLOSE,
  45         /* TCP_ESTABLISHED */ TCP_FIN_WAIT1 | TCP_ACTION_FIN,
  46         /* TCP_SYN_SENT    */ TCP_SYN_SENT,
  47         /* TCP_SYN_RECV    */ TCP_FIN_WAIT1 | TCP_ACTION_FIN,
  48         /* TCP_FIN_WAIT1   */ TCP_FIN_WAIT1,
  49         /* TCP_FIN_WAIT2   */ TCP_FIN_WAIT2,
  50         /* TCP_TIME_WAIT   */ TCP_CLOSE,
  51         /* TCP_CLOSE       */ TCP_CLOSE,
  52         /* TCP_CLOSE_WAIT  */ TCP_LAST_ACK | TCP_ACTION_FIN,
  53         /* TCP_LAST_ACK    */ TCP_LAST_ACK,
  54         /* TCP_LISTEN      */ TCP_CLOSE,
  55         /* TCP_CLOSING     */ TCP_CLOSING,
  56 };
  57
  58 static struct chtls_sock *chtls_sock_create(struct chtls_dev *cdev)
  59 {
  60         struct chtls_sock *csk = kzalloc(sizeof(*csk), GFP_ATOMIC);
  61
  62         if (!csk)
  63                 return NULL;
  64
  65         csk->txdata_skb_cache = alloc_skb(TXDATA_SKB_LEN, GFP_ATOMIC);
  66         if (!csk->txdata_skb_cache) {
  67                 kfree(csk);
  68                 return NULL;
  69         }
  70
  71         kref_init(&csk->kref);
  72         csk->cdev = cdev;
  73         skb_queue_head_init(&csk->txq);
  74         csk->wr_skb_head = NULL;
  75         csk->wr_skb_tail = NULL;
  76         csk->mss = MAX_MSS;
  77         csk->tlshws.ofld = 1;
  78         csk->tlshws.txkey = -1;
  79         csk->tlshws.rxkey = -1;
  80         csk->tlshws.mfs = TLS_MFS;
  81         skb_queue_head_init(&csk->tlshws.sk_recv_queue);
  82         return csk;
  83 }
  84
  85 static void chtls_sock_release(struct kref *ref)
  86 {
  87         struct chtls_sock *csk =
  88                 container_of(ref, struct chtls_sock, kref);
  89
  90         kfree(csk);
  91 }
  92
  93 static struct net_device *chtls_find_netdev(struct chtls_dev *cdev,
  94                                             struct sock *sk)
  95 {
  96         struct adapter *adap = pci_get_drvdata(cdev->pdev);
  97         struct net_device *ndev = cdev->ports[0];
  98 #if IS_ENABLED(CONFIG_IPV6)
  99         struct net_device *temp;
 100         int addr_type;
 101 #endif
 102         int i;
 103
 104         switch (sk->sk_family) {
 105         case PF_INET:
 106                 if (likely(!inet_sk(sk)->inet_rcv_saddr))
 107                         return ndev;
 108                 ndev = __ip_dev_find(&init_net, inet_sk(sk)->inet_rcv_saddr, false);
 109                 break;
 110 #if IS_ENABLED(CONFIG_IPV6)
 111         case PF_INET6:
 112                 addr_type = ipv6_addr_type(&sk->sk_v6_rcv_saddr);
 113                 if (likely(addr_type == IPV6_ADDR_ANY))
 114                         return ndev;
 115
 116                 for_each_netdev_rcu(&init_net, temp) {
 117                         if (ipv6_chk_addr(&init_net, (struct in6_addr *)
 118                                           &sk->sk_v6_rcv_saddr, temp, 1)) {
 119                                 ndev = temp;
 120                                 break;
 121                         }
 122                 }
 123         break;
 124 #endif
 125         default:
 126                 return NULL;
 127         }
 128
 129         if (!ndev)
 130                 return NULL;
 131
 132         if (is_vlan_dev(ndev))
 133                 ndev = vlan_dev_real_dev(ndev);
 134
 135         for_each_port(adap, i)
 136                 if (cdev->ports[i] == ndev)
 137                         return ndev;
 138         return NULL;
 139 }
 140
 141 static void assign_rxopt(struct sock *sk, unsigned int opt)
 142 {
 143         const struct chtls_dev *cdev;
 144         struct chtls_sock *csk;
 145         struct tcp_sock *tp;
 146
 147         csk = rcu_dereference_sk_user_data(sk);
 148         tp = tcp_sk(sk);
 149
 150         cdev = csk->cdev;
 151         tp->tcp_header_len           = sizeof(struct tcphdr);
 152         tp->rx_opt.mss_clamp         = cdev->mtus[TCPOPT_MSS_G(opt)] - 40;
 153         tp->mss_cache                = tp->rx_opt.mss_clamp;
 154         tp->rx_opt.tstamp_ok         = TCPOPT_TSTAMP_G(opt);
 155         tp->rx_opt.snd_wscale        = TCPOPT_SACK_G(opt);
 156         tp->rx_opt.wscale_ok         = TCPOPT_WSCALE_OK_G(opt);
 157         SND_WSCALE(tp)               = TCPOPT_SND_WSCALE_G(opt);
 158         if (!tp->rx_opt.wscale_ok)
 159                 tp->rx_opt.rcv_wscale = 0;
 160         if (tp->rx_opt.tstamp_ok) {
 161                 tp->tcp_header_len += TCPOLEN_TSTAMP_ALIGNED;
 162                 tp->rx_opt.mss_clamp -= TCPOLEN_TSTAMP_ALIGNED;
 163         } else if (csk->opt2 & TSTAMPS_EN_F) {
 164                 csk->opt2 &= ~TSTAMPS_EN_F;
 165                 csk->mtu_idx = TCPOPT_MSS_G(opt);
 166         }
 167 }
 168
 169 static void chtls_purge_receive_queue(struct sock *sk)
 170 {
 171         struct sk_buff *skb;
 172
 173         while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 174                 skb_dst_set(skb, (void *)NULL);
 175                 kfree_skb(skb);
 176         }
 177 }
 178
 179 static void chtls_purge_write_queue(struct sock *sk)
 180 {
 181         struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
 182         struct sk_buff *skb;
 183
 184         while ((skb = __skb_dequeue(&csk->txq))) {
 185                 sk->sk_wmem_queued -= skb->truesize;
 186                 __kfree_skb(skb);
 187         }
 188 }
 189
 190 static void chtls_purge_recv_queue(struct sock *sk)
 191 {
 192         struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
 193         struct chtls_hws *tlsk = &csk->tlshws;
 194         struct sk_buff *skb;
 195
 196         while ((skb = __skb_dequeue(&tlsk->sk_recv_queue)) != NULL) {
 197                 skb_dst_set(skb, NULL);
 198                 kfree_skb(skb);
 199         }
 200 }
 201
 202 static void abort_arp_failure(void *handle, struct sk_buff *skb)
 203 {
 204         struct cpl_abort_req *req = cplhdr(skb);
 205         struct chtls_dev *cdev;
 206
 207         cdev = (struct chtls_dev *)handle;
 208         req->cmd = CPL_ABORT_NO_RST;
 209         cxgb4_ofld_send(cdev->lldi->ports[0], skb);
 210 }
 211
 212 static struct sk_buff *alloc_ctrl_skb(struct sk_buff *skb, int len)
 213 {
 214         if (likely(skb && !skb_shared(skb) && !skb_cloned(skb))) {
 215                 __skb_trim(skb, 0);
 216                 refcount_inc(&skb->users);
 217         } else {
 218                 skb = alloc_skb(len, GFP_KERNEL | __GFP_NOFAIL);
 219         }
 220         return skb;
 221 }
 222
 223 static void chtls_send_abort(struct sock *sk, int mode, struct sk_buff *skb)
 224 {
 225         struct cpl_abort_req *req;
 226         struct chtls_sock *csk;
 227         struct tcp_sock *tp;
 228
 229         csk = rcu_dereference_sk_user_data(sk);
 230         tp = tcp_sk(sk);
 231
 232         if (!skb)
 233                 skb = alloc_ctrl_skb(csk->txdata_skb_cache, sizeof(*req));
 234
 235         req = (struct cpl_abort_req *)skb_put(skb, sizeof(*req));
 236         INIT_TP_WR_CPL(req, CPL_ABORT_REQ, csk->tid);
 237         skb_set_queue_mapping(skb, (csk->txq_idx << 1) | CPL_PRIORITY_DATA);
 238         req->rsvd0 = htonl(tp->snd_nxt);
 239         req->rsvd1 = !csk_flag_nochk(csk, CSK_TX_DATA_SENT);
 240         req->cmd = mode;
 241         t4_set_arp_err_handler(skb, csk->cdev, abort_arp_failure);
 242         send_or_defer(sk, tp, skb, mode == CPL_ABORT_SEND_RST);
 243 }
 244
 245 static void chtls_send_reset(struct sock *sk, int mode, struct sk_buff *skb)
 246 {
 247         struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
 248
 249         if (unlikely(csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN) ||
 250                      !csk->cdev)) {
 251                 if (sk->sk_state == TCP_SYN_RECV)
 252                         csk_set_flag(csk, CSK_RST_ABORTED);
 253                 goto out;
 254         }
 255
 256         if (!csk_flag_nochk(csk, CSK_TX_DATA_SENT)) {
 257                 struct tcp_sock *tp = tcp_sk(sk);
 258
 259                 if (send_tx_flowc_wr(sk, 0, tp->snd_nxt, tp->rcv_nxt) < 0)
 260                         WARN_ONCE(1, "send tx flowc error");
 261                 csk_set_flag(csk, CSK_TX_DATA_SENT);
 262         }
 263
 264         csk_set_flag(csk, CSK_ABORT_RPL_PENDING);
 265         chtls_purge_write_queue(sk);
 266
 267         csk_set_flag(csk, CSK_ABORT_SHUTDOWN);
 268         if (sk->sk_state != TCP_SYN_RECV)
 269                 chtls_send_abort(sk, mode, skb);
 270         else
 271                 chtls_set_tcb_field_rpl_skb(sk, TCB_T_FLAGS_W,
 272                                             TCB_T_FLAGS_V(TCB_T_FLAGS_M), 0,
 273                                             TCB_FIELD_COOKIE_TFLAG, 1);
 274
 275         return;
 276 out:
 277         kfree_skb(skb);
 278 }
 279
 280 static void release_tcp_port(struct sock *sk)
 281 {
 282         if (inet_csk(sk)->icsk_bind_hash)
 283                 inet_put_port(sk);
 284 }
 285
 286 static void tcp_uncork(struct sock *sk)
 287 {
 288         struct tcp_sock *tp = tcp_sk(sk);
 289
 290         if (tp->nonagle & TCP_NAGLE_CORK) {
 291                 tp->nonagle &= ~TCP_NAGLE_CORK;
 292                 chtls_tcp_push(sk, 0);
 293         }
 294 }
 295
 296 static void chtls_close_conn(struct sock *sk)
 297 {
 298         struct cpl_close_con_req *req;
 299         struct chtls_sock *csk;
 300         struct sk_buff *skb;
 301         unsigned int tid;
 302         unsigned int len;
 303
 304         len = roundup(sizeof(struct cpl_close_con_req), 16);
 305         csk = rcu_dereference_sk_user_data(sk);
 306         tid = csk->tid;
 307
 308         skb = alloc_skb(len, GFP_KERNEL | __GFP_NOFAIL);
 309         req = (struct cpl_close_con_req *)__skb_put(skb, len);
 310         memset(req, 0, len);
 311         req->wr.wr_hi = htonl(FW_WR_OP_V(FW_TP_WR) |
 312                               FW_WR_IMMDLEN_V(sizeof(*req) -
 313                                               sizeof(req->wr)));
 314         req->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)) |
 315                                FW_WR_FLOWID_V(tid));
 316
 317         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
 318
 319         tcp_uncork(sk);
 320         skb_entail(sk, skb, ULPCB_FLAG_NO_HDR | ULPCB_FLAG_NO_APPEND);
 321         if (sk->sk_state != TCP_SYN_SENT)
 322                 chtls_push_frames(csk, 1);
 323 }
 324
 325 /*
 326  * Perform a state transition during close and return the actions indicated
 327  * for the transition.  Do not make this function inline, the main reason
 328  * it exists at all is to avoid multiple inlining of tcp_set_state.
 329  */
 330 static int make_close_transition(struct sock *sk)
 331 {
 332         int next = (int)new_state[sk->sk_state];
 333
 334         tcp_set_state(sk, next & TCP_STATE_MASK);
 335         return next & TCP_ACTION_FIN;
 336 }
 337
 338 void chtls_close(struct sock *sk, long timeout)
 339 {
 340         int data_lost, prev_state;
 341         struct chtls_sock *csk;
 342
 343         csk = rcu_dereference_sk_user_data(sk);
 344
 345         lock_sock(sk);
 346         sk->sk_shutdown |= SHUTDOWN_MASK;
 347
 348         data_lost = skb_queue_len(&sk->sk_receive_queue);
 349         data_lost |= skb_queue_len(&csk->tlshws.sk_recv_queue);
 350         chtls_purge_recv_queue(sk);
 351         chtls_purge_receive_queue(sk);
 352
 353         if (sk->sk_state == TCP_CLOSE) {
 354                 goto wait;
 355         } else if (data_lost || sk->sk_state == TCP_SYN_SENT) {
 356                 chtls_send_reset(sk, CPL_ABORT_SEND_RST, NULL);
 357                 release_tcp_port(sk);
 358                 goto unlock;
 359         } else if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) {
 360                 sk->sk_prot->disconnect(sk, 0);
 361         } else if (make_close_transition(sk)) {
 362                 chtls_close_conn(sk);
 363         }
 364 wait:
 365         if (timeout)
 366                 sk_stream_wait_close(sk, timeout);
 367
 368 unlock:
 369         prev_state = sk->sk_state;
 370         sock_hold(sk);
 371         sock_orphan(sk);
 372
 373         release_sock(sk);
 374
 375         local_bh_disable();
 376         bh_lock_sock(sk);
 377
 378         if (prev_state != TCP_CLOSE && sk->sk_state == TCP_CLOSE)
 379                 goto out;
 380
 381         if (sk->sk_state == TCP_FIN_WAIT2 && tcp_sk(sk)->linger2 < 0 &&
 382             !csk_flag(sk, CSK_ABORT_SHUTDOWN)) {
 383                 struct sk_buff *skb;
 384
 385                 skb = alloc_skb(sizeof(struct cpl_abort_req), GFP_ATOMIC);
 386                 if (skb)
 387                         chtls_send_reset(sk, CPL_ABORT_SEND_RST, skb);
 388         }
 389
 390         if (sk->sk_state == TCP_CLOSE)
 391                 inet_csk_destroy_sock(sk);
 392
 393 out:
 394         bh_unlock_sock(sk);
 395         local_bh_enable();
 396         sock_put(sk);
 397 }
 398
 399 /*
 400  * Wait until a socket enters on of the given states.
 401  */
 402 static int wait_for_states(struct sock *sk, unsigned int states)
 403 {
 404         DECLARE_WAITQUEUE(wait, current);
 405         struct socket_wq _sk_wq;
 406         long current_timeo;
 407         int err = 0;
 408
 409         current_timeo = 200;
 410
 411         /*
 412          * We want this to work even when there's no associated struct socket.
 413          * In that case we provide a temporary wait_queue_head_t.
 414          */
 415         if (!sk->sk_wq) {
 416                 init_waitqueue_head(&_sk_wq.wait);
 417                 _sk_wq.fasync_list = NULL;
 418                 init_rcu_head_on_stack(&_sk_wq.rcu);
 419                 RCU_INIT_POINTER(sk->sk_wq, &_sk_wq);
 420         }
 421
 422         add_wait_queue(sk_sleep(sk), &wait);
 423         while (!sk_in_state(sk, states)) {
 424                 if (!current_timeo) {
 425                         err = -EBUSY;
 426                         break;
 427                 }
 428                 if (signal_pending(current)) {
 429                         err = sock_intr_errno(current_timeo);
 430                         break;
 431                 }
 432                 set_current_state(TASK_UNINTERRUPTIBLE);
 433                 release_sock(sk);
 434                 if (!sk_in_state(sk, states))
 435                         current_timeo = schedule_timeout(current_timeo);
 436                 __set_current_state(TASK_RUNNING);
 437                 lock_sock(sk);
 438         }
 439         remove_wait_queue(sk_sleep(sk), &wait);
 440
 441         if (rcu_dereference(sk->sk_wq) == &_sk_wq)
 442                 sk->sk_wq = NULL;
 443         return err;
 444 }
 445
 446 int chtls_disconnect(struct sock *sk, int flags)
 447 {
 448         struct tcp_sock *tp;
 449         int err;
 450
 451         tp = tcp_sk(sk);
 452         chtls_purge_recv_queue(sk);
 453         chtls_purge_receive_queue(sk);
 454         chtls_purge_write_queue(sk);
 455
 456         if (sk->sk_state != TCP_CLOSE) {
 457                 sk->sk_err = ECONNRESET;
 458                 chtls_send_reset(sk, CPL_ABORT_SEND_RST, NULL);
 459                 err = wait_for_states(sk, TCPF_CLOSE);
 460                 if (err)
 461                         return err;
 462         }
 463         chtls_purge_recv_queue(sk);
 464         chtls_purge_receive_queue(sk);
 465         tp->max_window = 0xFFFF << (tp->rx_opt.snd_wscale);
 466         return tcp_disconnect(sk, flags);
 467 }
 468
 469 #define SHUTDOWN_ELIGIBLE_STATE (TCPF_ESTABLISHED | \
 470                                  TCPF_SYN_RECV | TCPF_CLOSE_WAIT)
 471 void chtls_shutdown(struct sock *sk, int how)
 472 {
 473         if ((how & SEND_SHUTDOWN) &&
 474             sk_in_state(sk, SHUTDOWN_ELIGIBLE_STATE) &&
 475             make_close_transition(sk))
 476                 chtls_close_conn(sk);
 477 }
 478
 479 void chtls_destroy_sock(struct sock *sk)
 480 {
 481         struct chtls_sock *csk;
 482
 483         csk = rcu_dereference_sk_user_data(sk);
 484         chtls_purge_recv_queue(sk);
 485         csk->ulp_mode = ULP_MODE_NONE;
 486         chtls_purge_write_queue(sk);
 487         free_tls_keyid(sk);
 488         kref_put(&csk->kref, chtls_sock_release);
 489         if (sk->sk_family == AF_INET)
 490                 sk->sk_prot = &tcp_prot;
 491 #if IS_ENABLED(CONFIG_IPV6)
 492         else
 493                 sk->sk_prot = &tcpv6_prot;
 494 #endif
 495         sk->sk_prot->destroy(sk);
 496 }
 497
 498 static void reset_listen_child(struct sock *child)
 499 {
 500         struct chtls_sock *csk = rcu_dereference_sk_user_data(child);
 501         struct sk_buff *skb;
 502
 503         skb = alloc_ctrl_skb(csk->txdata_skb_cache,
 504                              sizeof(struct cpl_abort_req));
 505
 506         chtls_send_reset(child, CPL_ABORT_SEND_RST, skb);
 507         sock_orphan(child);
 508         INC_ORPHAN_COUNT(child);
 509         if (child->sk_state == TCP_CLOSE)
 510                 inet_csk_destroy_sock(child);
 511 }
 512
 513 static void chtls_disconnect_acceptq(struct sock *listen_sk)
 514 {
 515         struct request_sock **pprev;
 516
 517         pprev = ACCEPT_QUEUE(listen_sk);
 518         while (*pprev) {
 519                 struct request_sock *req = *pprev;
 520
 521                 if (req->rsk_ops == &chtls_rsk_ops ||
 522                     req->rsk_ops == &chtls_rsk_opsv6) {
 523                         struct sock *child = req->sk;
 524
 525                         *pprev = req->dl_next;
 526                         sk_acceptq_removed(listen_sk);
 527                         reqsk_put(req);
 528                         sock_hold(child);
 529                         local_bh_disable();
 530                         bh_lock_sock(child);
 531                         release_tcp_port(child);
 532                         reset_listen_child(child);
 533                         bh_unlock_sock(child);
 534                         local_bh_enable();
 535                         sock_put(child);
 536                 } else {
 537                         pprev = &req->dl_next;
 538                 }
 539         }
 540 }
 541
 542 static int listen_hashfn(const struct sock *sk)
 543 {
 544         return ((unsigned long)sk >> 10) & (LISTEN_INFO_HASH_SIZE - 1);
 545 }
 546
 547 static struct listen_info *listen_hash_add(struct chtls_dev *cdev,
 548                                            struct sock *sk,
 549                                            unsigned int stid)
 550 {
 551         struct listen_info *p = kmalloc(sizeof(*p), GFP_KERNEL);
 552
 553         if (p) {
 554                 int key = listen_hashfn(sk);
 555
 556                 p->sk = sk;
 557                 p->stid = stid;
 558                 spin_lock(&cdev->listen_lock);
 559                 p->next = cdev->listen_hash_tab[key];
 560                 cdev->listen_hash_tab[key] = p;
 561                 spin_unlock(&cdev->listen_lock);
 562         }
 563         return p;
 564 }
 565
 566 static int listen_hash_find(struct chtls_dev *cdev,
 567                             struct sock *sk)
 568 {
 569         struct listen_info *p;
 570         int stid = -1;
 571         int key;
 572
 573         key = listen_hashfn(sk);
 574
 575         spin_lock(&cdev->listen_lock);
 576         for (p = cdev->listen_hash_tab[key]; p; p = p->next)
 577                 if (p->sk == sk) {
 578                         stid = p->stid;
 579                         break;
 580                 }
 581         spin_unlock(&cdev->listen_lock);
 582         return stid;
 583 }
 584
 585 static int listen_hash_del(struct chtls_dev *cdev,
 586                            struct sock *sk)
 587 {
 588         struct listen_info *p, **prev;
 589         int stid = -1;
 590         int key;
 591
 592         key = listen_hashfn(sk);
 593         prev = &cdev->listen_hash_tab[key];
 594
 595         spin_lock(&cdev->listen_lock);
 596         for (p = *prev; p; prev = &p->next, p = p->next)
 597                 if (p->sk == sk) {
 598                         stid = p->stid;
 599                         *prev = p->next;
 600                         kfree(p);
 601                         break;
 602                 }
 603         spin_unlock(&cdev->listen_lock);
 604         return stid;
 605 }
 606
 607 static void cleanup_syn_rcv_conn(struct sock *child, struct sock *parent)
 608 {
 609         struct request_sock *req;
 610         struct chtls_sock *csk;
 611
 612         csk = rcu_dereference_sk_user_data(child);
 613         req = csk->passive_reap_next;
 614
 615         reqsk_queue_removed(&inet_csk(parent)->icsk_accept_queue, req);
 616         __skb_unlink((struct sk_buff *)&csk->synq, &csk->listen_ctx->synq);
 617         chtls_reqsk_free(req);
 618         csk->passive_reap_next = NULL;
 619 }
 620
 621 static void chtls_reset_synq(struct listen_ctx *listen_ctx)
 622 {
 623         struct sock *listen_sk = listen_ctx->lsk;
 624
 625         while (!skb_queue_empty(&listen_ctx->synq)) {
 626                 struct chtls_sock *csk =
 627                         container_of((struct synq *)skb_peek
 628                                 (&listen_ctx->synq), struct chtls_sock, synq);
 629                 struct sock *child = csk->sk;
 630
 631                 cleanup_syn_rcv_conn(child, listen_sk);
 632                 sock_hold(child);
 633                 local_bh_disable();
 634                 bh_lock_sock(child);
 635                 release_tcp_port(child);
 636                 reset_listen_child(child);
 637                 bh_unlock_sock(child);
 638                 local_bh_enable();
 639                 sock_put(child);
 640         }
 641 }
 642
 643 int chtls_listen_start(struct chtls_dev *cdev, struct sock *sk)
 644 {
 645         struct net_device *ndev;
 646 #if IS_ENABLED(CONFIG_IPV6)
 647         bool clip_valid = false;
 648 #endif
 649         struct listen_ctx *ctx;
 650         struct adapter *adap;
 651         struct port_info *pi;
 652         int ret = 0;
 653         int stid;
 654
 655         rcu_read_lock();
 656         ndev = chtls_find_netdev(cdev, sk);
 657         rcu_read_unlock();
 658         if (!ndev)
 659                 return -EBADF;
 660
 661         pi = netdev_priv(ndev);
 662         adap = pi->adapter;
 663         if (!(adap->flags & CXGB4_FULL_INIT_DONE))
 664                 return -EBADF;
 665
 666         if (listen_hash_find(cdev, sk) >= 0)   /* already have it */
 667                 return -EADDRINUSE;
 668
 669         ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
 670         if (!ctx)
 671                 return -ENOMEM;
 672
 673         __module_get(THIS_MODULE);
 674         ctx->lsk = sk;
 675         ctx->cdev = cdev;
 676         ctx->state = T4_LISTEN_START_PENDING;
 677         skb_queue_head_init(&ctx->synq);
 678
 679         stid = cxgb4_alloc_stid(cdev->tids, sk->sk_family, ctx);
 680         if (stid < 0)
 681                 goto free_ctx;
 682
 683         sock_hold(sk);
 684         if (!listen_hash_add(cdev, sk, stid))
 685                 goto free_stid;
 686
 687         if (sk->sk_family == PF_INET) {
 688                 ret = cxgb4_create_server(ndev, stid,
 689                                           inet_sk(sk)->inet_rcv_saddr,
 690                                           inet_sk(sk)->inet_sport, 0,
 691                                           cdev->lldi->rxq_ids[0]);
 692 #if IS_ENABLED(CONFIG_IPV6)
 693         } else {
 694                 int addr_type;
 695
 696                 addr_type = ipv6_addr_type(&sk->sk_v6_rcv_saddr);
 697                 if (addr_type != IPV6_ADDR_ANY) {
 698                         ret = cxgb4_clip_get(ndev, (const u32 *)
 699                                              &sk->sk_v6_rcv_saddr, 1);
 700                         if (ret)
 701                                 goto del_hash;
 702                         clip_valid = true;
 703                 }
 704                 ret = cxgb4_create_server6(ndev, stid,
 705                                            &sk->sk_v6_rcv_saddr,
 706                                            inet_sk(sk)->inet_sport,
 707                                            cdev->lldi->rxq_ids[0]);
 708 #endif
 709         }
 710         if (ret > 0)
 711                 ret = net_xmit_errno(ret);
 712         if (ret)
 713                 goto del_hash;
 714         return 0;
 715 del_hash:
 716 #if IS_ENABLED(CONFIG_IPV6)
 717         if (clip_valid)
 718                 cxgb4_clip_release(ndev, (const u32 *)&sk->sk_v6_rcv_saddr, 1);
 719 #endif
 720         listen_hash_del(cdev, sk);
 721 free_stid:
 722         cxgb4_free_stid(cdev->tids, stid, sk->sk_family);
 723         sock_put(sk);
 724 free_ctx:
 725         kfree(ctx);
 726         module_put(THIS_MODULE);
 727         return -EBADF;
 728 }
 729
 730 void chtls_listen_stop(struct chtls_dev *cdev, struct sock *sk)
 731 {
 732         struct listen_ctx *listen_ctx;
 733         int stid;
 734
 735         stid = listen_hash_del(cdev, sk);
 736         if (stid < 0)
 737                 return;
 738
 739         listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid);
 740         chtls_reset_synq(listen_ctx);
 741
 742         cxgb4_remove_server(cdev->lldi->ports[0], stid,
 743                             cdev->lldi->rxq_ids[0], sk->sk_family == PF_INET6);
 744
 745 #if IS_ENABLED(CONFIG_IPV6)
 746         if (sk->sk_family == PF_INET6) {
 747                 struct net_device *ndev = chtls_find_netdev(cdev, sk);
 748                 int addr_type = 0;
 749
 750                 addr_type = ipv6_addr_type((const struct in6_addr *)
 751                                           &sk->sk_v6_rcv_saddr);
 752                 if (addr_type != IPV6_ADDR_ANY)
 753                         cxgb4_clip_release(ndev, (const u32 *)
 754                                            &sk->sk_v6_rcv_saddr, 1);
 755         }
 756 #endif
 757         chtls_disconnect_acceptq(sk);
 758 }
 759
 760 static int chtls_pass_open_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
 761 {
 762         struct cpl_pass_open_rpl *rpl = cplhdr(skb) + RSS_HDR;
 763         unsigned int stid = GET_TID(rpl);
 764         struct listen_ctx *listen_ctx;
 765
 766         listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid);
 767         if (!listen_ctx)
 768                 return CPL_RET_BUF_DONE;
 769
 770         if (listen_ctx->state == T4_LISTEN_START_PENDING) {
 771                 listen_ctx->state = T4_LISTEN_STARTED;
 772                 return CPL_RET_BUF_DONE;
 773         }
 774
 775         if (rpl->status != CPL_ERR_NONE) {
 776                 pr_info("Unexpected PASS_OPEN_RPL status %u for STID %u\n",
 777                         rpl->status, stid);
 778         } else {
 779                 cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family);
 780                 sock_put(listen_ctx->lsk);
 781                 kfree(listen_ctx);
 782                 module_put(THIS_MODULE);
 783         }
 784         return CPL_RET_BUF_DONE;
 785 }
 786
 787 static int chtls_close_listsrv_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
 788 {
 789         struct cpl_close_listsvr_rpl *rpl = cplhdr(skb) + RSS_HDR;
 790         struct listen_ctx *listen_ctx;
 791         unsigned int stid;
 792         void *data;
 793
 794         stid = GET_TID(rpl);
 795         data = lookup_stid(cdev->tids, stid);
 796         listen_ctx = (struct listen_ctx *)data;
 797
 798         if (rpl->status != CPL_ERR_NONE) {
 799                 pr_info("Unexpected CLOSE_LISTSRV_RPL status %u for STID %u\n",
 800                         rpl->status, stid);
 801         } else {
 802                 cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family);
 803                 sock_put(listen_ctx->lsk);
 804                 kfree(listen_ctx);
 805                 module_put(THIS_MODULE);
 806         }
 807         return CPL_RET_BUF_DONE;
 808 }
 809
 810 static void chtls_purge_wr_queue(struct sock *sk)
 811 {
 812         struct sk_buff *skb;
 813
 814         while ((skb = dequeue_wr(sk)) != NULL)
 815                 kfree_skb(skb);
 816 }
 817
 818 static void chtls_release_resources(struct sock *sk)
 819 {
 820         struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
 821         struct chtls_dev *cdev = csk->cdev;
 822         unsigned int tid = csk->tid;
 823         struct tid_info *tids;
 824
 825         if (!cdev)
 826                 return;
 827
 828         tids = cdev->tids;
 829         kfree_skb(csk->txdata_skb_cache);
 830         csk->txdata_skb_cache = NULL;
 831
 832         if (csk->wr_credits != csk->wr_max_credits) {
 833                 chtls_purge_wr_queue(sk);
 834                 chtls_reset_wr_list(csk);
 835         }
 836
 837         if (csk->l2t_entry) {
 838                 cxgb4_l2t_release(csk->l2t_entry);
 839                 csk->l2t_entry = NULL;
 840         }
 841
 842         if (sk->sk_state != TCP_SYN_SENT) {
 843                 cxgb4_remove_tid(tids, csk->port_id, tid, sk->sk_family);
 844                 sock_put(sk);
 845         }
 846 }
 847
 848 static void chtls_conn_done(struct sock *sk)
 849 {
 850         if (sock_flag(sk, SOCK_DEAD))
 851                 chtls_purge_receive_queue(sk);
 852         sk_wakeup_sleepers(sk, 0);
 853         tcp_done(sk);
 854 }
 855
 856 static void do_abort_syn_rcv(struct sock *child, struct sock *parent)
 857 {
 858         /*
 859          * If the server is still open we clean up the child connection,
 860          * otherwise the server already did the clean up as it was purging
 861          * its SYN queue and the skb was just sitting in its backlog.
 862          */
 863         if (likely(parent->sk_state == TCP_LISTEN)) {
 864                 cleanup_syn_rcv_conn(child, parent);
 865                 /* Without the below call to sock_orphan,
 866                  * we leak the socket resource with syn_flood test
 867                  * as inet_csk_destroy_sock will not be called
 868                  * in tcp_done since SOCK_DEAD flag is not set.
 869                  * Kernel handles this differently where new socket is
 870                  * created only after 3 way handshake is done.
 871                  */
 872                 sock_orphan(child);
 873                 INC_ORPHAN_COUNT(child);
 874                 chtls_release_resources(child);
 875                 chtls_conn_done(child);
 876         } else {
 877                 if (csk_flag(child, CSK_RST_ABORTED)) {
 878                         chtls_release_resources(child);
 879                         chtls_conn_done(child);
 880                 }
 881         }
 882 }
 883
 884 static void pass_open_abort(struct sock *child, struct sock *parent,
 885                             struct sk_buff *skb)
 886 {
 887         do_abort_syn_rcv(child, parent);
 888         kfree_skb(skb);
 889 }
 890
 891 static void bl_pass_open_abort(struct sock *lsk, struct sk_buff *skb)
 892 {
 893         pass_open_abort(skb->sk, lsk, skb);
 894 }
 895
 896 static void chtls_pass_open_arp_failure(struct sock *sk,
 897                                         struct sk_buff *skb)
 898 {
 899         const struct request_sock *oreq;
 900         struct chtls_sock *csk;
 901         struct chtls_dev *cdev;
 902         struct sock *parent;
 903         void *data;
 904
 905         csk = rcu_dereference_sk_user_data(sk);
 906         cdev = csk->cdev;
 907
 908         /*
 909          * If the connection is being aborted due to the parent listening
 910          * socket going away there's nothing to do, the ABORT_REQ will close
 911          * the connection.
 912          */
 913         if (csk_flag(sk, CSK_ABORT_RPL_PENDING)) {
 914                 kfree_skb(skb);
 915                 return;
 916         }
 917
 918         oreq = csk->passive_reap_next;
 919         data = lookup_stid(cdev->tids, oreq->ts_recent);
 920         parent = ((struct listen_ctx *)data)->lsk;
 921
 922         bh_lock_sock(parent);
 923         if (!sock_owned_by_user(parent)) {
 924                 pass_open_abort(sk, parent, skb);
 925         } else {
 926                 BLOG_SKB_CB(skb)->backlog_rcv = bl_pass_open_abort;
 927                 __sk_add_backlog(parent, skb);
 928         }
 929         bh_unlock_sock(parent);
 930 }
 931
 932 static void chtls_accept_rpl_arp_failure(void *handle,
 933                                          struct sk_buff *skb)
 934 {
 935         struct sock *sk = (struct sock *)handle;
 936
 937         sock_hold(sk);
 938         process_cpl_msg(chtls_pass_open_arp_failure, sk, skb);
 939         sock_put(sk);
 940 }
 941
 942 static unsigned int chtls_select_mss(const struct chtls_sock *csk,
 943                                      unsigned int pmtu,
 944                                      struct cpl_pass_accept_req *req)
 945 {
 946         struct chtls_dev *cdev;
 947         struct dst_entry *dst;
 948         unsigned int tcpoptsz;
 949         unsigned int iphdrsz;
 950         unsigned int mtu_idx;
 951         struct tcp_sock *tp;
 952         unsigned int mss;
 953         struct sock *sk;
 954
 955         mss = ntohs(req->tcpopt.mss);
 956         sk = csk->sk;
 957         dst = __sk_dst_get(sk);
 958         cdev = csk->cdev;
 959         tp = tcp_sk(sk);
 960         tcpoptsz = 0;
 961
 962 #if IS_ENABLED(CONFIG_IPV6)
 963         if (sk->sk_family == AF_INET6)
 964                 iphdrsz = sizeof(struct ipv6hdr) + sizeof(struct tcphdr);
 965         else
 966 #endif
 967                 iphdrsz = sizeof(struct iphdr) + sizeof(struct tcphdr);
 968         if (req->tcpopt.tstamp)
 969                 tcpoptsz += round_up(TCPOLEN_TIMESTAMP, 4);
 970
 971         tp->advmss = dst_metric_advmss(dst);
 972         if (USER_MSS(tp) && tp->advmss > USER_MSS(tp))
 973                 tp->advmss = USER_MSS(tp);
 974         if (tp->advmss > pmtu - iphdrsz)
 975                 tp->advmss = pmtu - iphdrsz;
 976         if (mss && tp->advmss > mss)
 977                 tp->advmss = mss;
 978
 979         tp->advmss = cxgb4_best_aligned_mtu(cdev->lldi->mtus,
 980                                             iphdrsz + tcpoptsz,
 981                                             tp->advmss - tcpoptsz,
 982                                             8, &mtu_idx);
 983         tp->advmss -= iphdrsz;
 984
 985         inet_csk(sk)->icsk_pmtu_cookie = pmtu;
 986         return mtu_idx;
 987 }
 988
 989 static unsigned int select_rcv_wscale(int space, int wscale_ok, int win_clamp)
 990 {
 991         int wscale = 0;
 992
 993         if (space > MAX_RCV_WND)
 994                 space = MAX_RCV_WND;
 995         if (win_clamp && win_clamp < space)
 996                 space = win_clamp;
 997
 998         if (wscale_ok) {
 999                 while (wscale < 14 && (65535 << wscale) < space)
1000                         wscale++;
1001         }
1002         return wscale;
1003 }
1004
1005 static void chtls_pass_accept_rpl(struct sk_buff *skb,
1006                                   struct cpl_pass_accept_req *req,
1007                                   unsigned int tid)
1008
1009 {
1010         struct cpl_t5_pass_accept_rpl *rpl5;
1011         struct cxgb4_lld_info *lldi;
1012         const struct tcphdr *tcph;
1013         const struct tcp_sock *tp;
1014         struct chtls_sock *csk;
1015         unsigned int len;
1016         struct sock *sk;
1017         u32 opt2, hlen;
1018         u64 opt0;
1019
1020         sk = skb->sk;
1021         tp = tcp_sk(sk);
1022         csk = sk->sk_user_data;
1023         csk->tid = tid;
1024         lldi = csk->cdev->lldi;
1025         len = roundup(sizeof(*rpl5), 16);
1026
1027         rpl5 = __skb_put_zero(skb, len);
1028         INIT_TP_WR(rpl5, tid);
1029
1030         OPCODE_TID(rpl5) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1031                                                      csk->tid));
1032         csk->mtu_idx = chtls_select_mss(csk, dst_mtu(__sk_dst_get(sk)),
1033                                         req);
1034         opt0 = TCAM_BYPASS_F |
1035                WND_SCALE_V(RCV_WSCALE(tp)) |
1036                MSS_IDX_V(csk->mtu_idx) |
1037                L2T_IDX_V(csk->l2t_entry->idx) |
1038                NAGLE_V(!(tp->nonagle & TCP_NAGLE_OFF)) |
1039                TX_CHAN_V(csk->tx_chan) |
1040                SMAC_SEL_V(csk->smac_idx) |
1041                DSCP_V(csk->tos >> 2) |
1042                ULP_MODE_V(ULP_MODE_TLS) |
1043                RCV_BUFSIZ_V(min(tp->rcv_wnd >> 10, RCV_BUFSIZ_M));
1044
1045         opt2 = RX_CHANNEL_V(0) |
1046                 RSS_QUEUE_VALID_F | RSS_QUEUE_V(csk->rss_qid);
1047
1048         if (!is_t5(lldi->adapter_type))
1049                 opt2 |= RX_FC_DISABLE_F;
1050         if (req->tcpopt.tstamp)
1051                 opt2 |= TSTAMPS_EN_F;
1052         if (req->tcpopt.sack)
1053                 opt2 |= SACK_EN_F;
1054         hlen = ntohl(req->hdr_len);
1055
1056         tcph = (struct tcphdr *)((u8 *)(req + 1) +
1057                         T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen));
1058         if (tcph->ece && tcph->cwr)
1059                 opt2 |= CCTRL_ECN_V(1);
1060         opt2 |= CONG_CNTRL_V(CONG_ALG_NEWRENO);
1061         opt2 |= T5_ISS_F;
1062         opt2 |= T5_OPT_2_VALID_F;
1063         opt2 |= WND_SCALE_EN_V(WSCALE_OK(tp));
1064         rpl5->opt0 = cpu_to_be64(opt0);
1065         rpl5->opt2 = cpu_to_be32(opt2);
1066         rpl5->iss = cpu_to_be32((prandom_u32() & ~7UL) - 1);
1067         set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
1068         t4_set_arp_err_handler(skb, sk, chtls_accept_rpl_arp_failure);
1069         cxgb4_l2t_send(csk->egress_dev, skb, csk->l2t_entry);
1070 }
1071
1072 static void inet_inherit_port(struct sock *lsk, struct sock *newsk)
1073 {
1074         local_bh_disable();
1075         __inet_inherit_port(lsk, newsk);
1076         local_bh_enable();
1077 }
1078
1079 static int chtls_backlog_rcv(struct sock *sk, struct sk_buff *skb)
1080 {
1081         if (skb->protocol) {
1082                 kfree_skb(skb);
1083                 return 0;
1084         }
1085         BLOG_SKB_CB(skb)->backlog_rcv(sk, skb);
1086         return 0;
1087 }
1088
1089 static void chtls_set_tcp_window(struct chtls_sock *csk)
1090 {
1091         struct net_device *ndev = csk->egress_dev;
1092         struct port_info *pi = netdev_priv(ndev);
1093         unsigned int linkspeed;
1094         u8 scale;
1095
1096         linkspeed = pi->link_cfg.speed;
1097         scale = linkspeed / SPEED_10000;
1098 #define CHTLS_10G_RCVWIN (256 * 1024)
1099         csk->rcv_win = CHTLS_10G_RCVWIN;
1100         if (scale)
1101                 csk->rcv_win *= scale;
1102 #define CHTLS_10G_SNDWIN (256 * 1024)
1103         csk->snd_win = CHTLS_10G_SNDWIN;
1104         if (scale)
1105                 csk->snd_win *= scale;
1106 }
1107
1108 static struct sock *chtls_recv_sock(struct sock *lsk,
1109                                     struct request_sock *oreq,
1110                                     void *network_hdr,
1111                                     const struct cpl_pass_accept_req *req,
1112                                     struct chtls_dev *cdev)
1113 {
1114         struct adapter *adap = pci_get_drvdata(cdev->pdev);
1115         struct neighbour *n = NULL;
1116         struct inet_sock *newinet;
1117         const struct iphdr *iph;
1118         struct tls_context *ctx;
1119         struct net_device *ndev;
1120         struct chtls_sock *csk;
1121         struct dst_entry *dst;
1122         struct tcp_sock *tp;
1123         struct sock *newsk;
1124         bool found = false;
1125         u16 port_id;
1126         int rxq_idx;
1127         int step, i;
1128
1129         iph = (const struct iphdr *)network_hdr;
1130         newsk = tcp_create_openreq_child(lsk, oreq, cdev->askb);
1131         if (!newsk)
1132                 goto free_oreq;
1133
1134         if (lsk->sk_family == AF_INET) {
1135                 dst = inet_csk_route_child_sock(lsk, newsk, oreq);
1136                 if (!dst)
1137                         goto free_sk;
1138
1139                 n = dst_neigh_lookup(dst, &iph->saddr);
1140 #if IS_ENABLED(CONFIG_IPV6)
1141         } else {
1142                 const struct ipv6hdr *ip6h;
1143                 struct flowi6 fl6;
1144
1145                 ip6h = (const struct ipv6hdr *)network_hdr;
1146                 memset(&fl6, 0, sizeof(fl6));
1147                 fl6.flowi6_proto = IPPROTO_TCP;
1148                 fl6.saddr = ip6h->daddr;
1149                 fl6.daddr = ip6h->saddr;
1150                 fl6.fl6_dport = inet_rsk(oreq)->ir_rmt_port;
1151                 fl6.fl6_sport = htons(inet_rsk(oreq)->ir_num);
1152                 security_req_classify_flow(oreq, flowi6_to_flowi_common(&fl6));
1153                 dst = ip6_dst_lookup_flow(sock_net(lsk), lsk, &fl6, NULL);
1154                 if (IS_ERR(dst))
1155                         goto free_sk;
1156                 n = dst_neigh_lookup(dst, &ip6h->saddr);
1157 #endif
1158         }
1159         if (!n || !n->dev)
1160                 goto free_dst;
1161
1162         ndev = n->dev;
1163         if (is_vlan_dev(ndev))
1164                 ndev = vlan_dev_real_dev(ndev);
1165
1166         for_each_port(adap, i)
1167                 if (cdev->ports[i] == ndev)
1168                         found = true;
1169
1170         if (!found)
1171                 goto free_dst;
1172
1173         port_id = cxgb4_port_idx(ndev);
1174
1175         csk = chtls_sock_create(cdev);
1176         if (!csk)
1177                 goto free_dst;
1178
1179         csk->l2t_entry = cxgb4_l2t_get(cdev->lldi->l2t, n, ndev, 0);
1180         if (!csk->l2t_entry)
1181                 goto free_csk;
1182
1183         newsk->sk_user_data = csk;
1184         newsk->sk_backlog_rcv = chtls_backlog_rcv;
1185
1186         tp = tcp_sk(newsk);
1187         newinet = inet_sk(newsk);
1188
1189         if (iph->version == 0x4) {
1190                 newinet->inet_daddr = iph->saddr;
1191                 newinet->inet_rcv_saddr = iph->daddr;
1192                 newinet->inet_saddr = iph->daddr;
1193 #if IS_ENABLED(CONFIG_IPV6)
1194         } else {
1195                 struct tcp6_sock *newtcp6sk = (struct tcp6_sock *)newsk;
1196                 struct inet_request_sock *treq = inet_rsk(oreq);
1197                 struct ipv6_pinfo *newnp = inet6_sk(newsk);
1198                 struct ipv6_pinfo *np = inet6_sk(lsk);
1199
1200                 inet_sk(newsk)->pinet6 = &newtcp6sk->inet6;
1201                 memcpy(newnp, np, sizeof(struct ipv6_pinfo));
1202                 newsk->sk_v6_daddr = treq->ir_v6_rmt_addr;
1203                 newsk->sk_v6_rcv_saddr = treq->ir_v6_loc_addr;
1204                 inet6_sk(newsk)->saddr = treq->ir_v6_loc_addr;
1205                 newnp->ipv6_fl_list = NULL;
1206                 newnp->pktoptions = NULL;
1207                 newsk->sk_bound_dev_if = treq->ir_iif;
1208                 newinet->inet_opt = NULL;
1209                 newinet->inet_daddr = LOOPBACK4_IPV6;
1210                 newinet->inet_saddr = LOOPBACK4_IPV6;
1211 #endif
1212         }
1213
1214         oreq->ts_recent = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1215         sk_setup_caps(newsk, dst);
1216         ctx = tls_get_ctx(lsk);
1217         newsk->sk_destruct = ctx->sk_destruct;
1218         newsk->sk_prot_creator = lsk->sk_prot_creator;
1219         csk->sk = newsk;
1220         csk->passive_reap_next = oreq;
1221         csk->tx_chan = cxgb4_port_chan(ndev);
1222         csk->port_id = port_id;
1223         csk->egress_dev = ndev;
1224         csk->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
1225         chtls_set_tcp_window(csk);
1226         tp->rcv_wnd = csk->rcv_win;
1227         csk->sndbuf = csk->snd_win;
1228         csk->ulp_mode = ULP_MODE_TLS;
1229         step = cdev->lldi->nrxq / cdev->lldi->nchan;
1230         rxq_idx = port_id * step;
1231         rxq_idx += cdev->round_robin_cnt++ % step;
1232         csk->rss_qid = cdev->lldi->rxq_ids[rxq_idx];
1233         csk->txq_idx = (rxq_idx < cdev->lldi->ntxq) ? rxq_idx :
1234                         port_id * step;
1235         csk->sndbuf = newsk->sk_sndbuf;
1236         csk->smac_idx = ((struct port_info *)netdev_priv(ndev))->smt_idx;
1237         RCV_WSCALE(tp) = select_rcv_wscale(tcp_full_space(newsk),
1238                                            READ_ONCE(sock_net(newsk)->
1239                                                      ipv4.sysctl_tcp_window_scaling),
1240                                            tp->window_clamp);
1241         neigh_release(n);
1242         inet_inherit_port(lsk, newsk);
1243         csk_set_flag(csk, CSK_CONN_INLINE);
1244         bh_unlock_sock(newsk); /* tcp_create_openreq_child ->sk_clone_lock */
1245
1246         return newsk;
1247 free_csk:
1248         chtls_sock_release(&csk->kref);
1249 free_dst:
1250         if (n)
1251                 neigh_release(n);
1252         dst_release(dst);
1253 free_sk:
1254         inet_csk_prepare_forced_close(newsk);
1255         tcp_done(newsk);
1256 free_oreq:
1257         chtls_reqsk_free(oreq);
1258         return NULL;
1259 }
1260
1261 /*
1262  * Populate a TID_RELEASE WR.  The skb must be already propely sized.
1263  */
1264 static  void mk_tid_release(struct sk_buff *skb,
1265                             unsigned int chan, unsigned int tid)
1266 {
1267         struct cpl_tid_release *req;
1268         unsigned int len;
1269
1270         len = roundup(sizeof(struct cpl_tid_release), 16);
1271         req = (struct cpl_tid_release *)__skb_put(skb, len);
1272         memset(req, 0, len);
1273         set_wr_txq(skb, CPL_PRIORITY_SETUP, chan);
1274         INIT_TP_WR_CPL(req, CPL_TID_RELEASE, tid);
1275 }
1276
1277 static int chtls_get_module(struct sock *sk)
1278 {
1279         struct inet_connection_sock *icsk = inet_csk(sk);
1280
1281         if (!try_module_get(icsk->icsk_ulp_ops->owner))
1282                 return -1;
1283
1284         return 0;
1285 }
1286
1287 static void chtls_pass_accept_request(struct sock *sk,
1288                                       struct sk_buff *skb)
1289 {
1290         struct cpl_t5_pass_accept_rpl *rpl;
1291         struct cpl_pass_accept_req *req;
1292         struct listen_ctx *listen_ctx;
1293         struct vlan_ethhdr *vlan_eh;
1294         struct request_sock *oreq;
1295         struct sk_buff *reply_skb;
1296         struct chtls_sock *csk;
1297         struct chtls_dev *cdev;
1298         struct ipv6hdr *ip6h;
1299         struct tcphdr *tcph;
1300         struct sock *newsk;
1301         struct ethhdr *eh;
1302         struct iphdr *iph;
1303         void *network_hdr;
1304         unsigned int stid;
1305         unsigned int len;
1306         unsigned int tid;
1307         bool th_ecn, ect;
1308         __u8 ip_dsfield; /* IPv4 tos or IPv6 dsfield */
1309         u16 eth_hdr_len;
1310         bool ecn_ok;
1311
1312         req = cplhdr(skb) + RSS_HDR;
1313         tid = GET_TID(req);
1314         cdev = BLOG_SKB_CB(skb)->cdev;
1315         newsk = lookup_tid(cdev->tids, tid);
1316         stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1317         if (newsk) {
1318                 pr_info("tid (%d) already in use\n", tid);
1319                 return;
1320         }
1321
1322         len = roundup(sizeof(*rpl), 16);
1323         reply_skb = alloc_skb(len, GFP_ATOMIC);
1324         if (!reply_skb) {
1325                 cxgb4_remove_tid(cdev->tids, 0, tid, sk->sk_family);
1326                 kfree_skb(skb);
1327                 return;
1328         }
1329
1330         if (sk->sk_state != TCP_LISTEN)
1331                 goto reject;
1332
1333         if (inet_csk_reqsk_queue_is_full(sk))
1334                 goto reject;
1335
1336         if (sk_acceptq_is_full(sk))
1337                 goto reject;
1338
1339
1340         eth_hdr_len = T6_ETH_HDR_LEN_G(ntohl(req->hdr_len));
1341         if (eth_hdr_len == ETH_HLEN) {
1342                 eh = (struct ethhdr *)(req + 1);
1343                 iph = (struct iphdr *)(eh + 1);
1344                 ip6h = (struct ipv6hdr *)(eh + 1);
1345                 network_hdr = (void *)(eh + 1);
1346         } else {
1347                 vlan_eh = (struct vlan_ethhdr *)(req + 1);
1348                 iph = (struct iphdr *)(vlan_eh + 1);
1349                 ip6h = (struct ipv6hdr *)(vlan_eh + 1);
1350                 network_hdr = (void *)(vlan_eh + 1);
1351         }
1352
1353         if (iph->version == 0x4) {
1354                 tcph = (struct tcphdr *)(iph + 1);
1355                 skb_set_network_header(skb, (void *)iph - (void *)req);
1356                 oreq = inet_reqsk_alloc(&chtls_rsk_ops, sk, true);
1357         } else {
1358                 tcph = (struct tcphdr *)(ip6h + 1);
1359                 skb_set_network_header(skb, (void *)ip6h - (void *)req);
1360                 oreq = inet_reqsk_alloc(&chtls_rsk_opsv6, sk, false);
1361         }
1362
1363         if (!oreq)
1364                 goto reject;
1365
1366         oreq->rsk_rcv_wnd = 0;
1367         oreq->rsk_window_clamp = 0;
1368         oreq->syncookie = 0;
1369         oreq->mss = 0;
1370         oreq->ts_recent = 0;
1371
1372         tcp_rsk(oreq)->tfo_listener = false;
1373         tcp_rsk(oreq)->rcv_isn = ntohl(tcph->seq);
1374         chtls_set_req_port(oreq, tcph->source, tcph->dest);
1375         if (iph->version == 0x4) {
1376                 chtls_set_req_addr(oreq, iph->daddr, iph->saddr);
1377                 ip_dsfield = ipv4_get_dsfield(iph);
1378 #if IS_ENABLED(CONFIG_IPV6)
1379         } else {
1380                 inet_rsk(oreq)->ir_v6_rmt_addr = ipv6_hdr(skb)->saddr;
1381                 inet_rsk(oreq)->ir_v6_loc_addr = ipv6_hdr(skb)->daddr;
1382                 ip_dsfield = ipv6_get_dsfield(ipv6_hdr(skb));
1383 #endif
1384         }
1385         if (req->tcpopt.wsf <= 14 &&
1386             READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_window_scaling)) {
1387                 inet_rsk(oreq)->wscale_ok = 1;
1388                 inet_rsk(oreq)->snd_wscale = req->tcpopt.wsf;
1389         }
1390         inet_rsk(oreq)->ir_iif = sk->sk_bound_dev_if;
1391         th_ecn = tcph->ece && tcph->cwr;
1392         if (th_ecn) {
1393                 ect = !INET_ECN_is_not_ect(ip_dsfield);
1394                 ecn_ok = READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_ecn);
1395                 if ((!ect && ecn_ok) || tcp_ca_needs_ecn(sk))
1396                         inet_rsk(oreq)->ecn_ok = 1;
1397         }
1398
1399         newsk = chtls_recv_sock(sk, oreq, network_hdr, req, cdev);
1400         if (!newsk)
1401                 goto reject;
1402
1403         if (chtls_get_module(newsk))
1404                 goto reject;
1405         inet_csk_reqsk_queue_added(sk);
1406         reply_skb->sk = newsk;
1407         chtls_install_cpl_ops(newsk);
1408         cxgb4_insert_tid(cdev->tids, newsk, tid, newsk->sk_family);
1409         csk = rcu_dereference_sk_user_data(newsk);
1410         listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid);
1411         csk->listen_ctx = listen_ctx;
1412         __skb_queue_tail(&listen_ctx->synq, (struct sk_buff *)&csk->synq);
1413         chtls_pass_accept_rpl(reply_skb, req, tid);
1414         kfree_skb(skb);
1415         return;
1416
1417 reject:
1418         mk_tid_release(reply_skb, 0, tid);
1419         cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
1420         kfree_skb(skb);
1421 }
1422
1423 /*
1424  * Handle a CPL_PASS_ACCEPT_REQ message.
1425  */
1426 static int chtls_pass_accept_req(struct chtls_dev *cdev, struct sk_buff *skb)
1427 {
1428         struct cpl_pass_accept_req *req = cplhdr(skb) + RSS_HDR;
1429         struct listen_ctx *ctx;
1430         unsigned int stid;
1431         unsigned int tid;
1432         struct sock *lsk;
1433         void *data;
1434
1435         stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1436         tid = GET_TID(req);
1437
1438         data = lookup_stid(cdev->tids, stid);
1439         if (!data)
1440                 return 1;
1441
1442         ctx = (struct listen_ctx *)data;
1443         lsk = ctx->lsk;
1444
1445         if (unlikely(tid_out_of_range(cdev->tids, tid))) {
1446                 pr_info("passive open TID %u too large\n", tid);
1447                 return 1;
1448         }
1449
1450         BLOG_SKB_CB(skb)->cdev = cdev;
1451         process_cpl_msg(chtls_pass_accept_request, lsk, skb);
1452         return 0;
1453 }
1454
1455 /*
1456  * Completes some final bits of initialization for just established connections
1457  * and changes their state to TCP_ESTABLISHED.
1458  *
1459  * snd_isn here is the ISN after the SYN, i.e., the true ISN + 1.
1460  */
1461 static void make_established(struct sock *sk, u32 snd_isn, unsigned int opt)
1462 {
1463         struct tcp_sock *tp = tcp_sk(sk);
1464
1465         tp->pushed_seq = snd_isn;
1466         tp->write_seq = snd_isn;
1467         tp->snd_nxt = snd_isn;
1468         tp->snd_una = snd_isn;
1469         inet_sk(sk)->inet_id = prandom_u32();
1470         assign_rxopt(sk, opt);
1471
1472         if (tp->rcv_wnd > (RCV_BUFSIZ_M << 10))
1473                 tp->rcv_wup -= tp->rcv_wnd - (RCV_BUFSIZ_M << 10);
1474
1475         smp_mb();
1476         tcp_set_state(sk, TCP_ESTABLISHED);
1477 }
1478
1479 static void chtls_abort_conn(struct sock *sk, struct sk_buff *skb)
1480 {
1481         struct sk_buff *abort_skb;
1482
1483         abort_skb = alloc_skb(sizeof(struct cpl_abort_req), GFP_ATOMIC);
1484         if (abort_skb)
1485                 chtls_send_reset(sk, CPL_ABORT_SEND_RST, abort_skb);
1486 }
1487
1488 static struct sock *reap_list;
1489 static DEFINE_SPINLOCK(reap_list_lock);
1490
1491 /*
1492  * Process the reap list.
1493  */
1494 DECLARE_TASK_FUNC(process_reap_list, task_param)
1495 {
1496         spin_lock_bh(&reap_list_lock);
1497         while (reap_list) {
1498                 struct sock *sk = reap_list;
1499                 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
1500
1501                 reap_list = csk->passive_reap_next;
1502                 csk->passive_reap_next = NULL;
1503                 spin_unlock(&reap_list_lock);
1504                 sock_hold(sk);
1505
1506                 bh_lock_sock(sk);
1507                 chtls_abort_conn(sk, NULL);
1508                 sock_orphan(sk);
1509                 if (sk->sk_state == TCP_CLOSE)
1510                         inet_csk_destroy_sock(sk);
1511                 bh_unlock_sock(sk);
1512                 sock_put(sk);
1513                 spin_lock(&reap_list_lock);
1514         }
1515         spin_unlock_bh(&reap_list_lock);
1516 }
1517
1518 static DECLARE_WORK(reap_task, process_reap_list);
1519
1520 static void add_to_reap_list(struct sock *sk)
1521 {
1522         struct chtls_sock *csk = sk->sk_user_data;
1523
1524         local_bh_disable();
1525         release_tcp_port(sk); /* release the port immediately */
1526
1527         spin_lock(&reap_list_lock);
1528         csk->passive_reap_next = reap_list;
1529         reap_list = sk;
1530         if (!csk->passive_reap_next)
1531                 schedule_work(&reap_task);
1532         spin_unlock(&reap_list_lock);
1533         local_bh_enable();
1534 }
1535
1536 static void add_pass_open_to_parent(struct sock *child, struct sock *lsk,
1537                                     struct chtls_dev *cdev)
1538 {
1539         struct request_sock *oreq;
1540         struct chtls_sock *csk;
1541
1542         if (lsk->sk_state != TCP_LISTEN)
1543                 return;
1544
1545         csk = child->sk_user_data;
1546         oreq = csk->passive_reap_next;
1547         csk->passive_reap_next = NULL;
1548
1549         reqsk_queue_removed(&inet_csk(lsk)->icsk_accept_queue, oreq);
1550         __skb_unlink((struct sk_buff *)&csk->synq, &csk->listen_ctx->synq);
1551
1552         if (sk_acceptq_is_full(lsk)) {
1553                 chtls_reqsk_free(oreq);
1554                 add_to_reap_list(child);
1555         } else {
1556                 refcount_set(&oreq->rsk_refcnt, 1);
1557                 inet_csk_reqsk_queue_add(lsk, oreq, child);
1558                 lsk->sk_data_ready(lsk);
1559         }
1560 }
1561
1562 static void bl_add_pass_open_to_parent(struct sock *lsk, struct sk_buff *skb)
1563 {
1564         struct sock *child = skb->sk;
1565
1566         skb->sk = NULL;
1567         add_pass_open_to_parent(child, lsk, BLOG_SKB_CB(skb)->cdev);
1568         kfree_skb(skb);
1569 }
1570
1571 static int chtls_pass_establish(struct chtls_dev *cdev, struct sk_buff *skb)
1572 {
1573         struct cpl_pass_establish *req = cplhdr(skb) + RSS_HDR;
1574         struct chtls_sock *csk;
1575         struct sock *lsk, *sk;
1576         unsigned int hwtid;
1577
1578         hwtid = GET_TID(req);
1579         sk = lookup_tid(cdev->tids, hwtid);
1580         if (!sk)
1581                 return (CPL_RET_UNKNOWN_TID | CPL_RET_BUF_DONE);
1582
1583         bh_lock_sock(sk);
1584         if (unlikely(sock_owned_by_user(sk))) {
1585                 kfree_skb(skb);
1586         } else {
1587                 unsigned int stid;
1588                 void *data;
1589
1590                 csk = sk->sk_user_data;
1591                 csk->wr_max_credits = 64;
1592                 csk->wr_credits = 64;
1593                 csk->wr_unacked = 0;
1594                 make_established(sk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
1595                 stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1596                 sk->sk_state_change(sk);
1597                 if (unlikely(sk->sk_socket))
1598                         sk_wake_async(sk, 0, POLL_OUT);
1599
1600                 data = lookup_stid(cdev->tids, stid);
1601                 if (!data) {
1602                         /* listening server close */
1603                         kfree_skb(skb);
1604                         goto unlock;
1605                 }
1606                 lsk = ((struct listen_ctx *)data)->lsk;
1607
1608                 bh_lock_sock(lsk);
1609                 if (unlikely(skb_queue_empty(&csk->listen_ctx->synq))) {
1610                         /* removed from synq */
1611                         bh_unlock_sock(lsk);
1612                         kfree_skb(skb);
1613                         goto unlock;
1614                 }
1615
1616                 if (likely(!sock_owned_by_user(lsk))) {
1617                         kfree_skb(skb);
1618                         add_pass_open_to_parent(sk, lsk, cdev);
1619                 } else {
1620                         skb->sk = sk;
1621                         BLOG_SKB_CB(skb)->cdev = cdev;
1622                         BLOG_SKB_CB(skb)->backlog_rcv =
1623                                 bl_add_pass_open_to_parent;
1624                         __sk_add_backlog(lsk, skb);
1625                 }
1626                 bh_unlock_sock(lsk);
1627         }
1628 unlock:
1629         bh_unlock_sock(sk);
1630         return 0;
1631 }
1632
1633 /*
1634  * Handle receipt of an urgent pointer.
1635  */
1636 static void handle_urg_ptr(struct sock *sk, u32 urg_seq)
1637 {
1638         struct tcp_sock *tp = tcp_sk(sk);
1639
1640         urg_seq--;
1641         if (tp->urg_data && !after(urg_seq, tp->urg_seq))
1642                 return; /* duplicate pointer */
1643
1644         sk_send_sigurg(sk);
1645         if (tp->urg_seq == tp->copied_seq && tp->urg_data &&
1646             !sock_flag(sk, SOCK_URGINLINE) &&
1647             tp->copied_seq != tp->rcv_nxt) {
1648                 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1649
1650                 tp->copied_seq++;
1651                 if (skb && tp->copied_seq - ULP_SKB_CB(skb)->seq >= skb->len)
1652                         chtls_free_skb(sk, skb);
1653         }
1654
1655         tp->urg_data = TCP_URG_NOTYET;
1656         tp->urg_seq = urg_seq;
1657 }
1658
1659 static void check_sk_callbacks(struct chtls_sock *csk)
1660 {
1661         struct sock *sk = csk->sk;
1662
1663         if (unlikely(sk->sk_user_data &&
1664                      !csk_flag_nochk(csk, CSK_CALLBACKS_CHKD)))
1665                 csk_set_flag(csk, CSK_CALLBACKS_CHKD);
1666 }
1667
1668 /*
1669  * Handles Rx data that arrives in a state where the socket isn't accepting
1670  * new data.
1671  */
1672 static void handle_excess_rx(struct sock *sk, struct sk_buff *skb)
1673 {
1674         if (!csk_flag(sk, CSK_ABORT_SHUTDOWN))
1675                 chtls_abort_conn(sk, skb);
1676
1677         kfree_skb(skb);
1678 }
1679
1680 static void chtls_recv_data(struct sock *sk, struct sk_buff *skb)
1681 {
1682         struct cpl_rx_data *hdr = cplhdr(skb) + RSS_HDR;
1683         struct chtls_sock *csk;
1684         struct tcp_sock *tp;
1685
1686         csk = rcu_dereference_sk_user_data(sk);
1687         tp = tcp_sk(sk);
1688
1689         if (unlikely(sk->sk_shutdown & RCV_SHUTDOWN)) {
1690                 handle_excess_rx(sk, skb);
1691                 return;
1692         }
1693
1694         ULP_SKB_CB(skb)->seq = ntohl(hdr->seq);
1695         ULP_SKB_CB(skb)->psh = hdr->psh;
1696         skb_ulp_mode(skb) = ULP_MODE_NONE;
1697
1698         skb_reset_transport_header(skb);
1699         __skb_pull(skb, sizeof(*hdr) + RSS_HDR);
1700         if (!skb->data_len)
1701                 __skb_trim(skb, ntohs(hdr->len));
1702
1703         if (unlikely(hdr->urg))
1704                 handle_urg_ptr(sk, tp->rcv_nxt + ntohs(hdr->urg));
1705         if (unlikely(tp->urg_data == TCP_URG_NOTYET &&
1706                      tp->urg_seq - tp->rcv_nxt < skb->len))
1707                 tp->urg_data = TCP_URG_VALID |
1708                                skb->data[tp->urg_seq - tp->rcv_nxt];
1709
1710         if (unlikely(hdr->dack_mode != csk->delack_mode)) {
1711                 csk->delack_mode = hdr->dack_mode;
1712                 csk->delack_seq = tp->rcv_nxt;
1713         }
1714
1715         tcp_hdr(skb)->fin = 0;
1716         tp->rcv_nxt += skb->len;
1717
1718         __skb_queue_tail(&sk->sk_receive_queue, skb);
1719
1720         if (!sock_flag(sk, SOCK_DEAD)) {
1721                 check_sk_callbacks(csk);
1722                 sk->sk_data_ready(sk);
1723         }
1724 }
1725
1726 static int chtls_rx_data(struct chtls_dev *cdev, struct sk_buff *skb)
1727 {
1728         struct cpl_rx_data *req = cplhdr(skb) + RSS_HDR;
1729         unsigned int hwtid = GET_TID(req);
1730         struct sock *sk;
1731
1732         sk = lookup_tid(cdev->tids, hwtid);
1733         if (unlikely(!sk)) {
1734                 pr_err("can't find conn. for hwtid %u.\n", hwtid);
1735                 return -EINVAL;
1736         }
1737         skb_dst_set(skb, NULL);
1738         process_cpl_msg(chtls_recv_data, sk, skb);
1739         return 0;
1740 }
1741
1742 static void chtls_recv_pdu(struct sock *sk, struct sk_buff *skb)
1743 {
1744         struct cpl_tls_data *hdr = cplhdr(skb);
1745         struct chtls_sock *csk;
1746         struct chtls_hws *tlsk;
1747         struct tcp_sock *tp;
1748
1749         csk = rcu_dereference_sk_user_data(sk);
1750         tlsk = &csk->tlshws;
1751         tp = tcp_sk(sk);
1752
1753         if (unlikely(sk->sk_shutdown & RCV_SHUTDOWN)) {
1754                 handle_excess_rx(sk, skb);
1755                 return;
1756         }
1757
1758         ULP_SKB_CB(skb)->seq = ntohl(hdr->seq);
1759         ULP_SKB_CB(skb)->flags = 0;
1760         skb_ulp_mode(skb) = ULP_MODE_TLS;
1761
1762         skb_reset_transport_header(skb);
1763         __skb_pull(skb, sizeof(*hdr));
1764         if (!skb->data_len)
1765                 __skb_trim(skb,
1766                            CPL_TLS_DATA_LENGTH_G(ntohl(hdr->length_pkd)));
1767
1768         if (unlikely(tp->urg_data == TCP_URG_NOTYET && tp->urg_seq -
1769                      tp->rcv_nxt < skb->len))
1770                 tp->urg_data = TCP_URG_VALID |
1771                                skb->data[tp->urg_seq - tp->rcv_nxt];
1772
1773         tcp_hdr(skb)->fin = 0;
1774         tlsk->pldlen = CPL_TLS_DATA_LENGTH_G(ntohl(hdr->length_pkd));
1775         __skb_queue_tail(&tlsk->sk_recv_queue, skb);
1776 }
1777
1778 static int chtls_rx_pdu(struct chtls_dev *cdev, struct sk_buff *skb)
1779 {
1780         struct cpl_tls_data *req = cplhdr(skb);
1781         unsigned int hwtid = GET_TID(req);
1782         struct sock *sk;
1783
1784         sk = lookup_tid(cdev->tids, hwtid);
1785         if (unlikely(!sk)) {
1786                 pr_err("can't find conn. for hwtid %u.\n", hwtid);
1787                 return -EINVAL;
1788         }
1789         skb_dst_set(skb, NULL);
1790         process_cpl_msg(chtls_recv_pdu, sk, skb);
1791         return 0;
1792 }
1793
1794 static void chtls_set_hdrlen(struct sk_buff *skb, unsigned int nlen)
1795 {
1796         struct tlsrx_cmp_hdr *tls_cmp_hdr = cplhdr(skb);
1797
1798         skb->hdr_len = ntohs((__force __be16)tls_cmp_hdr->length);
1799         tls_cmp_hdr->length = ntohs((__force __be16)nlen);
1800 }
1801
1802 static void chtls_rx_hdr(struct sock *sk, struct sk_buff *skb)
1803 {
1804         struct tlsrx_cmp_hdr *tls_hdr_pkt;
1805         struct cpl_rx_tls_cmp *cmp_cpl;
1806         struct sk_buff *skb_rec;
1807         struct chtls_sock *csk;
1808         struct chtls_hws *tlsk;
1809         struct tcp_sock *tp;
1810
1811         cmp_cpl = cplhdr(skb);
1812         csk = rcu_dereference_sk_user_data(sk);
1813         tlsk = &csk->tlshws;
1814         tp = tcp_sk(sk);
1815
1816         ULP_SKB_CB(skb)->seq = ntohl(cmp_cpl->seq);
1817         ULP_SKB_CB(skb)->flags = 0;
1818
1819         skb_reset_transport_header(skb);
1820         __skb_pull(skb, sizeof(*cmp_cpl));
1821         tls_hdr_pkt = (struct tlsrx_cmp_hdr *)skb->data;
1822         if (tls_hdr_pkt->res_to_mac_error & TLSRX_HDR_PKT_ERROR_M)
1823                 tls_hdr_pkt->type = CONTENT_TYPE_ERROR;
1824         if (!skb->data_len)
1825                 __skb_trim(skb, TLS_HEADER_LENGTH);
1826
1827         tp->rcv_nxt +=
1828                 CPL_RX_TLS_CMP_PDULENGTH_G(ntohl(cmp_cpl->pdulength_length));
1829
1830         ULP_SKB_CB(skb)->flags |= ULPCB_FLAG_TLS_HDR;
1831         skb_rec = __skb_dequeue(&tlsk->sk_recv_queue);
1832         if (!skb_rec) {
1833                 __skb_queue_tail(&sk->sk_receive_queue, skb);
1834         } else {
1835                 chtls_set_hdrlen(skb, tlsk->pldlen);
1836                 tlsk->pldlen = 0;
1837                 __skb_queue_tail(&sk->sk_receive_queue, skb);
1838                 __skb_queue_tail(&sk->sk_receive_queue, skb_rec);
1839         }
1840
1841         if (!sock_flag(sk, SOCK_DEAD)) {
1842                 check_sk_callbacks(csk);
1843                 sk->sk_data_ready(sk);
1844         }
1845 }
1846
1847 static int chtls_rx_cmp(struct chtls_dev *cdev, struct sk_buff *skb)
1848 {
1849         struct cpl_rx_tls_cmp *req = cplhdr(skb);
1850         unsigned int hwtid = GET_TID(req);
1851         struct sock *sk;
1852
1853         sk = lookup_tid(cdev->tids, hwtid);
1854         if (unlikely(!sk)) {
1855                 pr_err("can't find conn. for hwtid %u.\n", hwtid);
1856                 return -EINVAL;
1857         }
1858         skb_dst_set(skb, NULL);
1859         process_cpl_msg(chtls_rx_hdr, sk, skb);
1860
1861         return 0;
1862 }
1863
1864 static void chtls_timewait(struct sock *sk)
1865 {
1866         struct tcp_sock *tp = tcp_sk(sk);
1867
1868         tp->rcv_nxt++;
1869         tp->rx_opt.ts_recent_stamp = ktime_get_seconds();
1870         tp->srtt_us = 0;
1871         tcp_time_wait(sk, TCP_TIME_WAIT, 0);
1872 }
1873
1874 static void chtls_peer_close(struct sock *sk, struct sk_buff *skb)
1875 {
1876         struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
1877
1878         if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
1879                 goto out;
1880
1881         sk->sk_shutdown |= RCV_SHUTDOWN;
1882         sock_set_flag(sk, SOCK_DONE);
1883
1884         switch (sk->sk_state) {
1885         case TCP_SYN_RECV:
1886         case TCP_ESTABLISHED:
1887                 tcp_set_state(sk, TCP_CLOSE_WAIT);
1888                 break;
1889         case TCP_FIN_WAIT1:
1890                 tcp_set_state(sk, TCP_CLOSING);
1891                 break;
1892         case TCP_FIN_WAIT2:
1893                 chtls_release_resources(sk);
1894                 if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
1895                         chtls_conn_done(sk);
1896                 else
1897                         chtls_timewait(sk);
1898                 break;
1899         default:
1900                 pr_info("cpl_peer_close in bad state %d\n", sk->sk_state);
1901         }
1902
1903         if (!sock_flag(sk, SOCK_DEAD)) {
1904                 sk->sk_state_change(sk);
1905                 /* Do not send POLL_HUP for half duplex close. */
1906
1907                 if ((sk->sk_shutdown & SEND_SHUTDOWN) ||
1908                     sk->sk_state == TCP_CLOSE)
1909                         sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_HUP);
1910                 else
1911                         sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
1912         }
1913 out:
1914         kfree_skb(skb);
1915 }
1916
1917 static void chtls_close_con_rpl(struct sock *sk, struct sk_buff *skb)
1918 {
1919         struct cpl_close_con_rpl *rpl = cplhdr(skb) + RSS_HDR;
1920         struct chtls_sock *csk;
1921         struct tcp_sock *tp;
1922
1923         csk = rcu_dereference_sk_user_data(sk);
1924
1925         if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
1926                 goto out;
1927
1928         tp = tcp_sk(sk);
1929
1930         tp->snd_una = ntohl(rpl->snd_nxt) - 1;  /* exclude FIN */
1931
1932         switch (sk->sk_state) {
1933         case TCP_CLOSING:
1934                 chtls_release_resources(sk);
1935                 if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
1936                         chtls_conn_done(sk);
1937                 else
1938                         chtls_timewait(sk);
1939                 break;
1940         case TCP_LAST_ACK:
1941                 chtls_release_resources(sk);
1942                 chtls_conn_done(sk);
1943                 break;
1944         case TCP_FIN_WAIT1:
1945                 tcp_set_state(sk, TCP_FIN_WAIT2);
1946                 sk->sk_shutdown |= SEND_SHUTDOWN;
1947
1948                 if (!sock_flag(sk, SOCK_DEAD))
1949                         sk->sk_state_change(sk);
1950                 else if (tcp_sk(sk)->linger2 < 0 &&
1951                          !csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN))
1952                         chtls_abort_conn(sk, skb);
1953                 else if (csk_flag_nochk(csk, CSK_TX_DATA_SENT))
1954                         chtls_set_quiesce_ctrl(sk, 0);
1955                 break;
1956         default:
1957                 pr_info("close_con_rpl in bad state %d\n", sk->sk_state);
1958         }
1959 out:
1960         kfree_skb(skb);
1961 }
1962
1963 static struct sk_buff *get_cpl_skb(struct sk_buff *skb,
1964                                    size_t len, gfp_t gfp)
1965 {
1966         if (likely(!skb_is_nonlinear(skb) && !skb_cloned(skb))) {
1967                 WARN_ONCE(skb->len < len, "skb alloc error");
1968                 __skb_trim(skb, len);
1969                 skb_get(skb);
1970         } else {
1971                 skb = alloc_skb(len, gfp);
1972                 if (skb)
1973                         __skb_put(skb, len);
1974         }
1975         return skb;
1976 }
1977
1978 static void set_abort_rpl_wr(struct sk_buff *skb, unsigned int tid,
1979                              int cmd)
1980 {
1981         struct cpl_abort_rpl *rpl = cplhdr(skb);
1982
1983         INIT_TP_WR_CPL(rpl, CPL_ABORT_RPL, tid);
1984         rpl->cmd = cmd;
1985 }
1986
1987 static void send_defer_abort_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
1988 {
1989         struct cpl_abort_req_rss *req = cplhdr(skb);
1990         struct sk_buff *reply_skb;
1991
1992         reply_skb = alloc_skb(sizeof(struct cpl_abort_rpl),
1993                               GFP_KERNEL | __GFP_NOFAIL);
1994         __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
1995         set_abort_rpl_wr(reply_skb, GET_TID(req),
1996                          (req->status & CPL_ABORT_NO_RST));
1997         set_wr_txq(reply_skb, CPL_PRIORITY_DATA, req->status >> 1);
1998         cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
1999         kfree_skb(skb);
2000 }
2001
2002 /*
2003  * Add an skb to the deferred skb queue for processing from process context.
2004  */
2005 static void t4_defer_reply(struct sk_buff *skb, struct chtls_dev *cdev,
2006                            defer_handler_t handler)
2007 {
2008         DEFERRED_SKB_CB(skb)->handler = handler;
2009         spin_lock_bh(&cdev->deferq.lock);
2010         __skb_queue_tail(&cdev->deferq, skb);
2011         if (skb_queue_len(&cdev->deferq) == 1)
2012                 schedule_work(&cdev->deferq_task);
2013         spin_unlock_bh(&cdev->deferq.lock);
2014 }
2015
2016 static void chtls_send_abort_rpl(struct sock *sk, struct sk_buff *skb,
2017                                  struct chtls_dev *cdev,
2018                                  int status, int queue)
2019 {
2020         struct cpl_abort_req_rss *req = cplhdr(skb) + RSS_HDR;
2021         struct sk_buff *reply_skb;
2022         struct chtls_sock *csk;
2023         unsigned int tid;
2024
2025         csk = rcu_dereference_sk_user_data(sk);
2026         tid = GET_TID(req);
2027
2028         reply_skb = get_cpl_skb(skb, sizeof(struct cpl_abort_rpl), gfp_any());
2029         if (!reply_skb) {
2030                 req->status = (queue << 1) | status;
2031                 t4_defer_reply(skb, cdev, send_defer_abort_rpl);
2032                 return;
2033         }
2034
2035         set_abort_rpl_wr(reply_skb, tid, status);
2036         kfree_skb(skb);
2037         set_wr_txq(reply_skb, CPL_PRIORITY_DATA, queue);
2038         if (csk_conn_inline(csk)) {
2039                 struct l2t_entry *e = csk->l2t_entry;
2040
2041                 if (e && sk->sk_state != TCP_SYN_RECV) {
2042                         cxgb4_l2t_send(csk->egress_dev, reply_skb, e);
2043                         return;
2044                 }
2045         }
2046         cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
2047 }
2048
2049 /*
2050  * This is run from a listener's backlog to abort a child connection in
2051  * SYN_RCV state (i.e., one on the listener's SYN queue).
2052  */
2053 static void bl_abort_syn_rcv(struct sock *lsk, struct sk_buff *skb)
2054 {
2055         struct chtls_sock *csk;
2056         struct sock *child;
2057         int queue;
2058
2059         child = skb->sk;
2060         csk = rcu_dereference_sk_user_data(child);
2061         queue = csk->txq_idx;
2062
2063         skb->sk = NULL;
2064         chtls_send_abort_rpl(child, skb, BLOG_SKB_CB(skb)->cdev,
2065                              CPL_ABORT_NO_RST, queue);
2066         do_abort_syn_rcv(child, lsk);
2067 }
2068
2069 static int abort_syn_rcv(struct sock *sk, struct sk_buff *skb)
2070 {
2071         const struct request_sock *oreq;
2072         struct listen_ctx *listen_ctx;
2073         struct chtls_sock *csk;
2074         struct chtls_dev *cdev;
2075         struct sock *psk;
2076         void *ctx;
2077
2078         csk = sk->sk_user_data;
2079         oreq = csk->passive_reap_next;
2080         cdev = csk->cdev;
2081
2082         if (!oreq)
2083                 return -1;
2084
2085         ctx = lookup_stid(cdev->tids, oreq->ts_recent);
2086         if (!ctx)
2087                 return -1;
2088
2089         listen_ctx = (struct listen_ctx *)ctx;
2090         psk = listen_ctx->lsk;
2091
2092         bh_lock_sock(psk);
2093         if (!sock_owned_by_user(psk)) {
2094                 int queue = csk->txq_idx;
2095
2096                 chtls_send_abort_rpl(sk, skb, cdev, CPL_ABORT_NO_RST, queue);
2097                 do_abort_syn_rcv(sk, psk);
2098         } else {
2099                 skb->sk = sk;
2100                 BLOG_SKB_CB(skb)->backlog_rcv = bl_abort_syn_rcv;
2101                 __sk_add_backlog(psk, skb);
2102         }
2103         bh_unlock_sock(psk);
2104         return 0;
2105 }
2106
2107 static void chtls_abort_req_rss(struct sock *sk, struct sk_buff *skb)
2108 {
2109         const struct cpl_abort_req_rss *req = cplhdr(skb) + RSS_HDR;
2110         struct chtls_sock *csk = sk->sk_user_data;
2111         int rst_status = CPL_ABORT_NO_RST;
2112         int queue = csk->txq_idx;
2113
2114         if (is_neg_adv(req->status)) {
2115                 kfree_skb(skb);
2116                 return;
2117         }
2118
2119         csk_reset_flag(csk, CSK_ABORT_REQ_RCVD);
2120
2121         if (!csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN) &&
2122             !csk_flag_nochk(csk, CSK_TX_DATA_SENT)) {
2123                 struct tcp_sock *tp = tcp_sk(sk);
2124
2125                 if (send_tx_flowc_wr(sk, 0, tp->snd_nxt, tp->rcv_nxt) < 0)
2126                         WARN_ONCE(1, "send_tx_flowc error");
2127                 csk_set_flag(csk, CSK_TX_DATA_SENT);
2128         }
2129
2130         csk_set_flag(csk, CSK_ABORT_SHUTDOWN);
2131
2132         if (!csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) {
2133                 sk->sk_err = ETIMEDOUT;
2134
2135                 if (!sock_flag(sk, SOCK_DEAD))
2136                         sk_error_report(sk);
2137
2138                 if (sk->sk_state == TCP_SYN_RECV && !abort_syn_rcv(sk, skb))
2139                         return;
2140
2141         }
2142
2143         chtls_send_abort_rpl(sk, skb, BLOG_SKB_CB(skb)->cdev,
2144                              rst_status, queue);
2145         chtls_release_resources(sk);
2146         chtls_conn_done(sk);
2147 }
2148
2149 static void chtls_abort_rpl_rss(struct sock *sk, struct sk_buff *skb)
2150 {
2151         struct cpl_abort_rpl_rss *rpl = cplhdr(skb) + RSS_HDR;
2152         struct chtls_sock *csk;
2153         struct chtls_dev *cdev;
2154
2155         csk = rcu_dereference_sk_user_data(sk);
2156         cdev = csk->cdev;
2157
2158         if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) {
2159                 csk_reset_flag(csk, CSK_ABORT_RPL_PENDING);
2160                 if (!csk_flag_nochk(csk, CSK_ABORT_REQ_RCVD)) {
2161                         if (sk->sk_state == TCP_SYN_SENT) {
2162                                 cxgb4_remove_tid(cdev->tids,
2163                                                  csk->port_id,
2164                                                  GET_TID(rpl),
2165                                                  sk->sk_family);
2166                                 sock_put(sk);
2167                         }
2168                         chtls_release_resources(sk);
2169                         chtls_conn_done(sk);
2170                 }
2171         }
2172         kfree_skb(skb);
2173 }
2174
2175 static int chtls_conn_cpl(struct chtls_dev *cdev, struct sk_buff *skb)
2176 {
2177         struct cpl_peer_close *req = cplhdr(skb) + RSS_HDR;
2178         void (*fn)(struct sock *sk, struct sk_buff *skb);
2179         unsigned int hwtid = GET_TID(req);
2180         struct chtls_sock *csk;
2181         struct sock *sk;
2182         u8 opcode;
2183
2184         opcode = ((const struct rss_header *)cplhdr(skb))->opcode;
2185
2186         sk = lookup_tid(cdev->tids, hwtid);
2187         if (!sk)
2188                 goto rel_skb;
2189
2190         csk = sk->sk_user_data;
2191
2192         switch (opcode) {
2193         case CPL_PEER_CLOSE:
2194                 fn = chtls_peer_close;
2195                 break;
2196         case CPL_CLOSE_CON_RPL:
2197                 fn = chtls_close_con_rpl;
2198                 break;
2199         case CPL_ABORT_REQ_RSS:
2200                 /*
2201                  * Save the offload device in the skb, we may process this
2202                  * message after the socket has closed.
2203                  */
2204                 BLOG_SKB_CB(skb)->cdev = csk->cdev;
2205                 fn = chtls_abort_req_rss;
2206                 break;
2207         case CPL_ABORT_RPL_RSS:
2208                 fn = chtls_abort_rpl_rss;
2209                 break;
2210         default:
2211                 goto rel_skb;
2212         }
2213
2214         process_cpl_msg(fn, sk, skb);
2215         return 0;
2216
2217 rel_skb:
2218         kfree_skb(skb);
2219         return 0;
2220 }
2221
2222 static void chtls_rx_ack(struct sock *sk, struct sk_buff *skb)
2223 {
2224         struct cpl_fw4_ack *hdr = cplhdr(skb) + RSS_HDR;
2225         struct chtls_sock *csk = sk->sk_user_data;
2226         struct tcp_sock *tp = tcp_sk(sk);
2227         u32 credits = hdr->credits;
2228         u32 snd_una;
2229
2230         snd_una = ntohl(hdr->snd_una);
2231         csk->wr_credits += credits;
2232
2233         if (csk->wr_unacked > csk->wr_max_credits - csk->wr_credits)
2234                 csk->wr_unacked = csk->wr_max_credits - csk->wr_credits;
2235
2236         while (credits) {
2237                 struct sk_buff *pskb = csk->wr_skb_head;
2238                 u32 csum;
2239
2240                 if (unlikely(!pskb)) {
2241                         if (csk->wr_nondata)
2242                                 csk->wr_nondata -= credits;
2243                         break;
2244                 }
2245                 csum = (__force u32)pskb->csum;
2246                 if (unlikely(credits < csum)) {
2247                         pskb->csum = (__force __wsum)(csum - credits);
2248                         break;
2249                 }
2250                 dequeue_wr(sk);
2251                 credits -= csum;
2252                 kfree_skb(pskb);
2253         }
2254         if (hdr->seq_vld & CPL_FW4_ACK_FLAGS_SEQVAL) {
2255                 if (unlikely(before(snd_una, tp->snd_una))) {
2256                         kfree_skb(skb);
2257                         return;
2258                 }
2259
2260                 if (tp->snd_una != snd_una) {
2261                         tp->snd_una = snd_una;
2262                         tp->rcv_tstamp = tcp_time_stamp(tp);
2263                         if (tp->snd_una == tp->snd_nxt &&
2264                             !csk_flag_nochk(csk, CSK_TX_FAILOVER))
2265                                 csk_reset_flag(csk, CSK_TX_WAIT_IDLE);
2266                 }
2267         }
2268
2269         if (hdr->seq_vld & CPL_FW4_ACK_FLAGS_CH) {
2270                 unsigned int fclen16 = roundup(failover_flowc_wr_len, 16);
2271
2272                 csk->wr_credits -= fclen16;
2273                 csk_reset_flag(csk, CSK_TX_WAIT_IDLE);
2274                 csk_reset_flag(csk, CSK_TX_FAILOVER);
2275         }
2276         if (skb_queue_len(&csk->txq) && chtls_push_frames(csk, 0))
2277                 sk->sk_write_space(sk);
2278
2279         kfree_skb(skb);
2280 }
2281
2282 static int chtls_wr_ack(struct chtls_dev *cdev, struct sk_buff *skb)
2283 {
2284         struct cpl_fw4_ack *rpl = cplhdr(skb) + RSS_HDR;
2285         unsigned int hwtid = GET_TID(rpl);
2286         struct sock *sk;
2287
2288         sk = lookup_tid(cdev->tids, hwtid);
2289         if (unlikely(!sk)) {
2290                 pr_err("can't find conn. for hwtid %u.\n", hwtid);
2291                 return -EINVAL;
2292         }
2293         process_cpl_msg(chtls_rx_ack, sk, skb);
2294
2295         return 0;
2296 }
2297
2298 static int chtls_set_tcb_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
2299 {
2300         struct cpl_set_tcb_rpl *rpl = cplhdr(skb) + RSS_HDR;
2301         unsigned int hwtid = GET_TID(rpl);
2302         struct sock *sk;
2303
2304         sk = lookup_tid(cdev->tids, hwtid);
2305
2306         /* return EINVAL if socket doesn't exist */
2307         if (!sk)
2308                 return -EINVAL;
2309
2310         /* Reusing the skb as size of cpl_set_tcb_field structure
2311          * is greater than cpl_abort_req
2312          */
2313         if (TCB_COOKIE_G(rpl->cookie) == TCB_FIELD_COOKIE_TFLAG)
2314                 chtls_send_abort(sk, CPL_ABORT_SEND_RST, NULL);
2315
2316         kfree_skb(skb);
2317         return 0;
2318 }
2319
2320 chtls_handler_func chtls_handlers[NUM_CPL_CMDS] = {
2321         [CPL_PASS_OPEN_RPL]     = chtls_pass_open_rpl,
2322         [CPL_CLOSE_LISTSRV_RPL] = chtls_close_listsrv_rpl,
2323         [CPL_PASS_ACCEPT_REQ]   = chtls_pass_accept_req,
2324         [CPL_PASS_ESTABLISH]    = chtls_pass_establish,
2325         [CPL_RX_DATA]           = chtls_rx_data,
2326         [CPL_TLS_DATA]          = chtls_rx_pdu,
2327         [CPL_RX_TLS_CMP]        = chtls_rx_cmp,
2328         [CPL_PEER_CLOSE]        = chtls_conn_cpl,
2329         [CPL_CLOSE_CON_RPL]     = chtls_conn_cpl,
2330         [CPL_ABORT_REQ_RSS]     = chtls_conn_cpl,
2331         [CPL_ABORT_RPL_RSS]     = chtls_conn_cpl,
2332         [CPL_FW4_ACK]           = chtls_wr_ack,
2333         [CPL_SET_TCB_RPL]       = chtls_set_tcb_rpl,
2334 };