1/*- 2 * Copyright (c) 2012 Chelsio Communications, Inc. 3 * All rights reserved. 4 * Written by: Navdeep Parhar <np@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD$"); 30 31#include "opt_inet.h" 32#include "opt_inet6.h" 33 34#ifdef TCP_OFFLOAD 35#include <sys/param.h> 36#include <sys/types.h> 37#include <sys/kernel.h> 38#include <sys/ktr.h> 39#include <sys/module.h> 40#include <sys/protosw.h> 41#include <sys/refcount.h> 42#include <sys/domain.h> 43#include <sys/fnv_hash.h> 44#include <sys/socket.h> 45#include <sys/socketvar.h> 46#include <net/ethernet.h> 47#include <net/if.h> 48#include <net/if_types.h> 49#include <net/if_vlan_var.h> 50#include <net/route.h> 51#include <netinet/in.h> 52#include <netinet/in_pcb.h> 53#include <netinet/ip.h> 54#include <netinet/ip6.h> 55#include <netinet6/scope6_var.h> 56#include <netinet/tcp_timer.h> 57#include <netinet/tcp_var.h> 58#define TCPSTATES 59#include <netinet/tcp_fsm.h> 60#include <netinet/toecore.h> 61 62#include "common/common.h" 63#include "common/t4_msg.h" 64#include "common/t4_regs.h" 65#include "tom/t4_tom_l2t.h" 66#include "tom/t4_tom.h" 67 68/* stid services */ 69static int alloc_stid(struct adapter *, struct listen_ctx *, int); 70static struct listen_ctx *lookup_stid(struct adapter *, int); 71static void free_stid(struct adapter *, struct listen_ctx *); 72 73/* lctx services */ 74static struct listen_ctx *alloc_lctx(struct adapter *, struct inpcb *, 75 struct port_info *); 76static int free_lctx(struct adapter *, struct listen_ctx *); 77static void hold_lctx(struct listen_ctx *); 78static void listen_hash_add(struct adapter *, struct listen_ctx *); 79static struct listen_ctx *listen_hash_find(struct adapter *, struct inpcb *); 80static struct listen_ctx *listen_hash_del(struct adapter *, struct inpcb *); 81static struct inpcb *release_lctx(struct adapter *, struct listen_ctx *); 82 83static inline void save_qids_in_mbuf(struct mbuf *, struct port_info *); 84static inline void get_qids_from_mbuf(struct mbuf *m, int *, int *); 85static void send_reset_synqe(struct toedev *, struct synq_entry *); 86 87static int 88alloc_stid(struct adapter *sc, struct listen_ctx *lctx, int isipv6) 89{ 90 struct tid_info *t = &sc->tids; 91 u_int stid, n, f, mask; 92 struct stid_region *sr = &lctx->stid_region; 93 94 /* 95 * An IPv6 server needs 2 naturally aligned stids (1 stid = 4 cells) in 96 * the TCAM. The start of the stid region is properly aligned (the chip 97 * requires each region to be 128-cell aligned). 98 */ 99 n = isipv6 ? 2 : 1; 100 mask = n - 1; 101 KASSERT((t->stid_base & mask) == 0 && (t->nstids & mask) == 0, 102 ("%s: stid region (%u, %u) not properly aligned. n = %u", 103 __func__, t->stid_base, t->nstids, n)); 104 105 mtx_lock(&t->stid_lock); 106 if (n > t->nstids - t->stids_in_use) { 107 mtx_unlock(&t->stid_lock); 108 return (-1); 109 } 110 111 if (t->nstids_free_head >= n) { 112 /* 113 * This allocation will definitely succeed because the region 114 * starts at a good alignment and we just checked we have enough 115 * stids free. 116 */ 117 f = t->nstids_free_head & mask; 118 t->nstids_free_head -= n + f; 119 stid = t->nstids_free_head; 120 TAILQ_INSERT_HEAD(&t->stids, sr, link); 121 } else { 122 struct stid_region *s; 123 124 stid = t->nstids_free_head; 125 TAILQ_FOREACH(s, &t->stids, link) { 126 stid += s->used + s->free; 127 f = stid & mask; 128 if (s->free >= n + f) { 129 stid -= n + f; 130 s->free -= n + f; 131 TAILQ_INSERT_AFTER(&t->stids, s, sr, link); 132 goto allocated; 133 } 134 } 135 136 if (__predict_false(stid != t->nstids)) { 137 panic("%s: stids TAILQ (%p) corrupt." 138 " At %d instead of %d at the end of the queue.", 139 __func__, &t->stids, stid, t->nstids); 140 } 141 142 mtx_unlock(&t->stid_lock); 143 return (-1); 144 } 145 146allocated: 147 sr->used = n; 148 sr->free = f; 149 t->stids_in_use += n; 150 t->stid_tab[stid] = lctx; 151 mtx_unlock(&t->stid_lock); 152 153 KASSERT(((stid + t->stid_base) & mask) == 0, 154 ("%s: EDOOFUS.", __func__)); 155 return (stid + t->stid_base); 156} 157 158static struct listen_ctx * 159lookup_stid(struct adapter *sc, int stid) 160{ 161 struct tid_info *t = &sc->tids; 162 163 return (t->stid_tab[stid - t->stid_base]); 164} 165 166static void 167free_stid(struct adapter *sc, struct listen_ctx *lctx) 168{ 169 struct tid_info *t = &sc->tids; 170 struct stid_region *sr = &lctx->stid_region; 171 struct stid_region *s; 172 173 KASSERT(sr->used > 0, ("%s: nonsense free (%d)", __func__, sr->used)); 174 175 mtx_lock(&t->stid_lock); 176 s = TAILQ_PREV(sr, stid_head, link); 177 if (s != NULL) 178 s->free += sr->used + sr->free; 179 else 180 t->nstids_free_head += sr->used + sr->free; 181 KASSERT(t->stids_in_use >= sr->used, 182 ("%s: stids_in_use (%u) < stids being freed (%u)", __func__, 183 t->stids_in_use, sr->used)); 184 t->stids_in_use -= sr->used; 185 TAILQ_REMOVE(&t->stids, sr, link); 186 mtx_unlock(&t->stid_lock); 187} 188 189static struct listen_ctx * 190alloc_lctx(struct adapter *sc, struct inpcb *inp, struct port_info *pi) 191{ 192 struct listen_ctx *lctx; 193 194 INP_WLOCK_ASSERT(inp); 195 196 lctx = malloc(sizeof(struct listen_ctx), M_CXGBE, M_NOWAIT | M_ZERO); 197 if (lctx == NULL) 198 return (NULL); 199 200 lctx->stid = alloc_stid(sc, lctx, inp->inp_vflag & INP_IPV6); 201 if (lctx->stid < 0) { 202 free(lctx, M_CXGBE); 203 return (NULL); 204 } 205 206 if (inp->inp_vflag & INP_IPV6 && 207 !IN6_ARE_ADDR_EQUAL(&in6addr_any, &inp->in6p_laddr)) { 208 struct tom_data *td = sc->tom_softc; 209 210 lctx->ce = hold_lip(td, &inp->in6p_laddr); 211 if (lctx->ce == NULL) { 212 free(lctx, M_CXGBE); 213 return (NULL); 214 } 215 } 216 217 lctx->ctrlq = &sc->sge.ctrlq[pi->port_id]; 218 lctx->ofld_rxq = &sc->sge.ofld_rxq[pi->first_ofld_rxq]; 219 refcount_init(&lctx->refcount, 1); 220 TAILQ_INIT(&lctx->synq); 221 222 lctx->inp = inp; 223 in_pcbref(inp); 224 225 return (lctx); 226} 227 228/* Don't call this directly, use release_lctx instead */ 229static int 230free_lctx(struct adapter *sc, struct listen_ctx *lctx) 231{ 232 struct inpcb *inp = lctx->inp; 233 struct tom_data *td = sc->tom_softc; 234 235 INP_WLOCK_ASSERT(inp); 236 KASSERT(lctx->refcount == 0, 237 ("%s: refcount %d", __func__, lctx->refcount)); 238 KASSERT(TAILQ_EMPTY(&lctx->synq), 239 ("%s: synq not empty.", __func__)); 240 KASSERT(lctx->stid >= 0, ("%s: bad stid %d.", __func__, lctx->stid)); 241 242 CTR4(KTR_CXGBE, "%s: stid %u, lctx %p, inp %p", 243 __func__, lctx->stid, lctx, lctx->inp); 244 245 if (lctx->ce) 246 release_lip(td, lctx->ce); 247 free_stid(sc, lctx); 248 free(lctx, M_CXGBE); 249 250 return (in_pcbrele_wlocked(inp)); 251} 252 253static void 254hold_lctx(struct listen_ctx *lctx) 255{ 256 257 refcount_acquire(&lctx->refcount); 258} 259 260static inline uint32_t 261listen_hashfn(void *key, u_long mask) 262{ 263 264 return (fnv_32_buf(&key, sizeof(key), FNV1_32_INIT) & mask); 265} 266 267/* 268 * Add a listen_ctx entry to the listen hash table. 269 */ 270static void 271listen_hash_add(struct adapter *sc, struct listen_ctx *lctx) 272{ 273 struct tom_data *td = sc->tom_softc; 274 int bucket = listen_hashfn(lctx->inp, td->listen_mask); 275 276 mtx_lock(&td->lctx_hash_lock); 277 LIST_INSERT_HEAD(&td->listen_hash[bucket], lctx, link); 278 td->lctx_count++; 279 mtx_unlock(&td->lctx_hash_lock); 280} 281 282/* 283 * Look for the listening socket's context entry in the hash and return it. 284 */ 285static struct listen_ctx * 286listen_hash_find(struct adapter *sc, struct inpcb *inp) 287{ 288 struct tom_data *td = sc->tom_softc; 289 int bucket = listen_hashfn(inp, td->listen_mask); 290 struct listen_ctx *lctx; 291 292 mtx_lock(&td->lctx_hash_lock); 293 LIST_FOREACH(lctx, &td->listen_hash[bucket], link) { 294 if (lctx->inp == inp) 295 break; 296 } 297 mtx_unlock(&td->lctx_hash_lock); 298 299 return (lctx); 300} 301 302/* 303 * Removes the listen_ctx structure for inp from the hash and returns it. 304 */ 305static struct listen_ctx * 306listen_hash_del(struct adapter *sc, struct inpcb *inp) 307{ 308 struct tom_data *td = sc->tom_softc; 309 int bucket = listen_hashfn(inp, td->listen_mask); 310 struct listen_ctx *lctx, *l; 311 312 mtx_lock(&td->lctx_hash_lock); 313 LIST_FOREACH_SAFE(lctx, &td->listen_hash[bucket], link, l) { 314 if (lctx->inp == inp) { 315 LIST_REMOVE(lctx, link); 316 td->lctx_count--; 317 break; 318 } 319 } 320 mtx_unlock(&td->lctx_hash_lock); 321 322 return (lctx); 323} 324 325/* 326 * Releases a hold on the lctx. Must be called with the listening socket's inp 327 * locked. The inp may be freed by this function and it returns NULL to 328 * indicate this. 329 */ 330static struct inpcb * 331release_lctx(struct adapter *sc, struct listen_ctx *lctx) 332{ 333 struct inpcb *inp = lctx->inp; 334 int inp_freed = 0; 335 336 INP_WLOCK_ASSERT(inp); 337 if (refcount_release(&lctx->refcount)) 338 inp_freed = free_lctx(sc, lctx); 339 340 return (inp_freed ? NULL : inp); 341} 342 343static void 344send_reset_synqe(struct toedev *tod, struct synq_entry *synqe) 345{ 346 struct adapter *sc = tod->tod_softc; 347 struct mbuf *m = synqe->syn; 348 struct ifnet *ifp = m->m_pkthdr.rcvif; 349 struct port_info *pi = ifp->if_softc; 350 struct l2t_entry *e = &sc->l2t->l2tab[synqe->l2e_idx]; 351 struct wrqe *wr; 352 struct fw_flowc_wr *flowc; 353 struct cpl_abort_req *req; 354 int txqid, rxqid, flowclen; 355 struct sge_wrq *ofld_txq; 356 struct sge_ofld_rxq *ofld_rxq; 357 const int nparams = 6; 358 unsigned int pfvf = G_FW_VIID_PFN(pi->viid) << S_FW_VIID_PFN; 359 360 INP_WLOCK_ASSERT(synqe->lctx->inp); 361 362 CTR5(KTR_CXGBE, "%s: synqe %p (0x%x), tid %d%s", 363 __func__, synqe, synqe->flags, synqe->tid, 364 synqe->flags & TPF_ABORT_SHUTDOWN ? 365 " (abort already in progress)" : ""); 366 if (synqe->flags & TPF_ABORT_SHUTDOWN) 367 return; /* abort already in progress */ 368 synqe->flags |= TPF_ABORT_SHUTDOWN; 369 370 get_qids_from_mbuf(m, &txqid, &rxqid); 371 ofld_txq = &sc->sge.ofld_txq[txqid]; 372 ofld_rxq = &sc->sge.ofld_rxq[rxqid]; 373 374 /* The wrqe will have two WRs - a flowc followed by an abort_req */ 375 flowclen = sizeof(*flowc) + nparams * sizeof(struct fw_flowc_mnemval); 376 377 wr = alloc_wrqe(roundup2(flowclen, EQ_ESIZE) + sizeof(*req), ofld_txq); 378 if (wr == NULL) { 379 /* XXX */ 380 panic("%s: allocation failure.", __func__); 381 } 382 flowc = wrtod(wr); 383 req = (void *)((caddr_t)flowc + roundup2(flowclen, EQ_ESIZE)); 384 385 /* First the flowc ... */ 386 memset(flowc, 0, wr->wr_len); 387 flowc->op_to_nparams = htobe32(V_FW_WR_OP(FW_FLOWC_WR) | 388 V_FW_FLOWC_WR_NPARAMS(nparams)); 389 flowc->flowid_len16 = htonl(V_FW_WR_LEN16(howmany(flowclen, 16)) | 390 V_FW_WR_FLOWID(synqe->tid)); 391 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 392 flowc->mnemval[0].val = htobe32(pfvf); 393 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 394 flowc->mnemval[1].val = htobe32(pi->tx_chan); 395 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 396 flowc->mnemval[2].val = htobe32(pi->tx_chan); 397 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 398 flowc->mnemval[3].val = htobe32(ofld_rxq->iq.abs_id); 399 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDBUF; 400 flowc->mnemval[4].val = htobe32(512); 401 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_MSS; 402 flowc->mnemval[5].val = htobe32(512); 403 synqe->flags |= TPF_FLOWC_WR_SENT; 404 405 /* ... then ABORT request */ 406 INIT_TP_WR_MIT_CPL(req, CPL_ABORT_REQ, synqe->tid); 407 req->rsvd0 = 0; /* don't have a snd_nxt */ 408 req->rsvd1 = 1; /* no data sent yet */ 409 req->cmd = CPL_ABORT_SEND_RST; 410 411 t4_l2t_send(sc, wr, e); 412} 413 414static int 415create_server(struct adapter *sc, struct listen_ctx *lctx) 416{ 417 struct wrqe *wr; 418 struct cpl_pass_open_req *req; 419 struct inpcb *inp = lctx->inp; 420 421 wr = alloc_wrqe(sizeof(*req), lctx->ctrlq); 422 if (wr == NULL) { 423 log(LOG_ERR, "%s: allocation failure", __func__); 424 return (ENOMEM); 425 } 426 req = wrtod(wr); 427 428 INIT_TP_WR(req, 0); 429 OPCODE_TID(req) = htobe32(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, lctx->stid)); 430 req->local_port = inp->inp_lport; 431 req->peer_port = 0; 432 req->local_ip = inp->inp_laddr.s_addr; 433 req->peer_ip = 0; 434 req->opt0 = htobe64(V_TX_CHAN(lctx->ctrlq->eq.tx_chan)); 435 req->opt1 = htobe64(V_CONN_POLICY(CPL_CONN_POLICY_ASK) | 436 F_SYN_RSS_ENABLE | V_SYN_RSS_QUEUE(lctx->ofld_rxq->iq.abs_id)); 437 438 t4_wrq_tx(sc, wr); 439 return (0); 440} 441 442static int 443create_server6(struct adapter *sc, struct listen_ctx *lctx) 444{ 445 struct wrqe *wr; 446 struct cpl_pass_open_req6 *req; 447 struct inpcb *inp = lctx->inp; 448 449 wr = alloc_wrqe(sizeof(*req), lctx->ctrlq); 450 if (wr == NULL) { 451 log(LOG_ERR, "%s: allocation failure", __func__); 452 return (ENOMEM); 453 } 454 req = wrtod(wr); 455 456 INIT_TP_WR(req, 0); 457 OPCODE_TID(req) = htobe32(MK_OPCODE_TID(CPL_PASS_OPEN_REQ6, lctx->stid)); 458 req->local_port = inp->inp_lport; 459 req->peer_port = 0; 460 req->local_ip_hi = *(uint64_t *)&inp->in6p_laddr.s6_addr[0]; 461 req->local_ip_lo = *(uint64_t *)&inp->in6p_laddr.s6_addr[8]; 462 req->peer_ip_hi = 0; 463 req->peer_ip_lo = 0; 464 req->opt0 = htobe64(V_TX_CHAN(lctx->ctrlq->eq.tx_chan)); 465 req->opt1 = htobe64(V_CONN_POLICY(CPL_CONN_POLICY_ASK) | 466 F_SYN_RSS_ENABLE | V_SYN_RSS_QUEUE(lctx->ofld_rxq->iq.abs_id)); 467 468 t4_wrq_tx(sc, wr); 469 return (0); 470} 471 472static int 473destroy_server(struct adapter *sc, struct listen_ctx *lctx) 474{ 475 struct wrqe *wr; 476 struct cpl_close_listsvr_req *req; 477 478 wr = alloc_wrqe(sizeof(*req), lctx->ctrlq); 479 if (wr == NULL) { 480 /* XXX */ 481 panic("%s: allocation failure.", __func__); 482 } 483 req = wrtod(wr); 484 485 INIT_TP_WR(req, 0); 486 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, 487 lctx->stid)); 488 req->reply_ctrl = htobe16(lctx->ofld_rxq->iq.abs_id); 489 req->rsvd = htobe16(0); 490 491 t4_wrq_tx(sc, wr); 492 return (0); 493} 494 495/* 496 * Start a listening server by sending a passive open request to HW. 497 * 498 * Can't take adapter lock here and access to sc->flags, sc->open_device_map, 499 * sc->offload_map, if_capenable are all race prone. 500 */ 501int 502t4_listen_start(struct toedev *tod, struct tcpcb *tp) 503{ 504 struct adapter *sc = tod->tod_softc; 505 struct port_info *pi; 506 struct inpcb *inp = tp->t_inpcb; 507 struct listen_ctx *lctx; 508 int i, rc; 509 510 INP_WLOCK_ASSERT(inp); 511 512 /* Don't start a hardware listener for any loopback address. */ 513 if (inp->inp_vflag & INP_IPV6 && IN6_IS_ADDR_LOOPBACK(&inp->in6p_laddr)) 514 return (0); 515 if (!(inp->inp_vflag & INP_IPV6) && 516 IN_LOOPBACK(ntohl(inp->inp_laddr.s_addr))) 517 return (0); 518#if 0 519 ADAPTER_LOCK(sc); 520 if (IS_BUSY(sc)) { 521 log(LOG_ERR, "%s: listen request ignored, %s is busy", 522 __func__, device_get_nameunit(sc->dev)); 523 goto done; 524 } 525 526 KASSERT(sc->flags & TOM_INIT_DONE, 527 ("%s: TOM not initialized", __func__)); 528#endif 529 530 if ((sc->open_device_map & sc->offload_map) == 0) 531 goto done; /* no port that's UP with IFCAP_TOE enabled */ 532 533 /* 534 * Find a running port with IFCAP_TOE (4 or 6). We'll use the first 535 * such port's queues to send the passive open and receive the reply to 536 * it. 537 * 538 * XXX: need a way to mark a port in use by offload. if_cxgbe should 539 * then reject any attempt to bring down such a port (and maybe reject 540 * attempts to disable IFCAP_TOE on that port too?). 541 */ 542 for_each_port(sc, i) { 543 if (isset(&sc->open_device_map, i) && 544 sc->port[i]->ifp->if_capenable & IFCAP_TOE) 545 break; 546 } 547 KASSERT(i < sc->params.nports, 548 ("%s: no running port with TOE capability enabled.", __func__)); 549 pi = sc->port[i]; 550 551 if (listen_hash_find(sc, inp) != NULL) 552 goto done; /* already setup */ 553 554 lctx = alloc_lctx(sc, inp, pi); 555 if (lctx == NULL) { 556 log(LOG_ERR, 557 "%s: listen request ignored, %s couldn't allocate lctx\n", 558 __func__, device_get_nameunit(sc->dev)); 559 goto done; 560 } 561 listen_hash_add(sc, lctx); 562 563 CTR6(KTR_CXGBE, "%s: stid %u (%s), lctx %p, inp %p vflag 0x%x", 564 __func__, lctx->stid, tcpstates[tp->t_state], lctx, inp, 565 inp->inp_vflag); 566 567 if (inp->inp_vflag & INP_IPV6) 568 rc = create_server6(sc, lctx); 569 else 570 rc = create_server(sc, lctx); 571 if (rc != 0) { 572 log(LOG_ERR, "%s: %s failed to create hw listener: %d.\n", 573 __func__, device_get_nameunit(sc->dev), rc); 574 (void) listen_hash_del(sc, inp); 575 inp = release_lctx(sc, lctx); 576 /* can't be freed, host stack has a reference */ 577 KASSERT(inp != NULL, ("%s: inp freed", __func__)); 578 goto done; 579 } 580 lctx->flags |= LCTX_RPL_PENDING; 581done: 582#if 0 583 ADAPTER_UNLOCK(sc); 584#endif 585 return (0); 586} 587 588int 589t4_listen_stop(struct toedev *tod, struct tcpcb *tp) 590{ 591 struct listen_ctx *lctx; 592 struct adapter *sc = tod->tod_softc; 593 struct inpcb *inp = tp->t_inpcb; 594 struct synq_entry *synqe; 595 596 INP_WLOCK_ASSERT(inp); 597 598 lctx = listen_hash_del(sc, inp); 599 if (lctx == NULL) 600 return (ENOENT); /* no hardware listener for this inp */ 601 602 CTR4(KTR_CXGBE, "%s: stid %u, lctx %p, flags %x", __func__, lctx->stid, 603 lctx, lctx->flags); 604 605 /* 606 * If the reply to the PASS_OPEN is still pending we'll wait for it to 607 * arrive and clean up when it does. 608 */ 609 if (lctx->flags & LCTX_RPL_PENDING) { 610 KASSERT(TAILQ_EMPTY(&lctx->synq), 611 ("%s: synq not empty.", __func__)); 612 return (EINPROGRESS); 613 } 614 615 /* 616 * The host stack will abort all the connections on the listening 617 * socket's so_comp. It doesn't know about the connections on the synq 618 * so we need to take care of those. 619 */ 620 TAILQ_FOREACH(synqe, &lctx->synq, link) { 621 if (synqe->flags & TPF_SYNQE_HAS_L2TE) 622 send_reset_synqe(tod, synqe); 623 } 624 625 destroy_server(sc, lctx); 626 return (0); 627} 628 629static inline void 630hold_synqe(struct synq_entry *synqe) 631{ 632 633 refcount_acquire(&synqe->refcnt); 634} 635 636static inline void 637release_synqe(struct synq_entry *synqe) 638{ 639 640 if (refcount_release(&synqe->refcnt)) { 641 int needfree = synqe->flags & TPF_SYNQE_NEEDFREE; 642 643 m_freem(synqe->syn); 644 if (needfree) 645 free(synqe, M_CXGBE); 646 } 647} 648 649void 650t4_syncache_added(struct toedev *tod __unused, void *arg) 651{ 652 struct synq_entry *synqe = arg; 653 654 hold_synqe(synqe); 655} 656 657void 658t4_syncache_removed(struct toedev *tod __unused, void *arg) 659{ 660 struct synq_entry *synqe = arg; 661 662 release_synqe(synqe); 663} 664 665/* XXX */ 666extern void tcp_dooptions(struct tcpopt *, u_char *, int, int); 667 668int 669t4_syncache_respond(struct toedev *tod, void *arg, struct mbuf *m) 670{ 671 struct adapter *sc = tod->tod_softc; 672 struct synq_entry *synqe = arg; 673 struct wrqe *wr; 674 struct l2t_entry *e; 675 struct tcpopt to; 676 struct ip *ip = mtod(m, struct ip *); 677 struct tcphdr *th; 678 679 wr = (struct wrqe *)atomic_readandclear_ptr(&synqe->wr); 680 if (wr == NULL) { 681 m_freem(m); 682 return (EALREADY); 683 } 684 685 if (ip->ip_v == IPVERSION) 686 th = (void *)(ip + 1); 687 else 688 th = (void *)((struct ip6_hdr *)ip + 1); 689 bzero(&to, sizeof(to)); 690 tcp_dooptions(&to, (void *)(th + 1), (th->th_off << 2) - sizeof(*th), 691 TO_SYN); 692 693 /* save these for later */ 694 synqe->iss = be32toh(th->th_seq); 695 synqe->ts = to.to_tsval; 696 697 if (is_t5(sc)) { 698 struct cpl_t5_pass_accept_rpl *rpl5 = wrtod(wr); 699 700 rpl5->iss = th->th_seq; 701 } 702 703 e = &sc->l2t->l2tab[synqe->l2e_idx]; 704 t4_l2t_send(sc, wr, e); 705 706 m_freem(m); /* don't need this any more */ 707 return (0); 708} 709 710static int 711do_pass_open_rpl(struct sge_iq *iq, const struct rss_header *rss, 712 struct mbuf *m) 713{ 714 struct adapter *sc = iq->adapter; 715 const struct cpl_pass_open_rpl *cpl = (const void *)(rss + 1); 716 int stid = GET_TID(cpl); 717 unsigned int status = cpl->status; 718 struct listen_ctx *lctx = lookup_stid(sc, stid); 719 struct inpcb *inp = lctx->inp; 720#ifdef INVARIANTS 721 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 722#endif 723 724 KASSERT(opcode == CPL_PASS_OPEN_RPL, 725 ("%s: unexpected opcode 0x%x", __func__, opcode)); 726 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 727 KASSERT(lctx->stid == stid, ("%s: lctx stid mismatch", __func__)); 728 729 INP_WLOCK(inp); 730 731 CTR4(KTR_CXGBE, "%s: stid %d, status %u, flags 0x%x", 732 __func__, stid, status, lctx->flags); 733 734 lctx->flags &= ~LCTX_RPL_PENDING; 735 736 if (status != CPL_ERR_NONE) 737 log(LOG_ERR, "listener (stid %u) failed: %d\n", stid, status); 738 739#ifdef INVARIANTS 740 /* 741 * If the inp has been dropped (listening socket closed) then 742 * listen_stop must have run and taken the inp out of the hash. 743 */ 744 if (inp->inp_flags & INP_DROPPED) { 745 KASSERT(listen_hash_del(sc, inp) == NULL, 746 ("%s: inp %p still in listen hash", __func__, inp)); 747 } 748#endif 749 750 if (inp->inp_flags & INP_DROPPED && status != CPL_ERR_NONE) { 751 if (release_lctx(sc, lctx) != NULL) 752 INP_WUNLOCK(inp); 753 return (status); 754 } 755 756 /* 757 * Listening socket stopped listening earlier and now the chip tells us 758 * it has started the hardware listener. Stop it; the lctx will be 759 * released in do_close_server_rpl. 760 */ 761 if (inp->inp_flags & INP_DROPPED) { 762 destroy_server(sc, lctx); 763 INP_WUNLOCK(inp); 764 return (status); 765 } 766 767 /* 768 * Failed to start hardware listener. Take inp out of the hash and 769 * release our reference on it. An error message has been logged 770 * already. 771 */ 772 if (status != CPL_ERR_NONE) { 773 listen_hash_del(sc, inp); 774 if (release_lctx(sc, lctx) != NULL) 775 INP_WUNLOCK(inp); 776 return (status); 777 } 778 779 /* hardware listener open for business */ 780 781 INP_WUNLOCK(inp); 782 return (status); 783} 784 785static int 786do_close_server_rpl(struct sge_iq *iq, const struct rss_header *rss, 787 struct mbuf *m) 788{ 789 struct adapter *sc = iq->adapter; 790 const struct cpl_close_listsvr_rpl *cpl = (const void *)(rss + 1); 791 int stid = GET_TID(cpl); 792 unsigned int status = cpl->status; 793 struct listen_ctx *lctx = lookup_stid(sc, stid); 794 struct inpcb *inp = lctx->inp; 795#ifdef INVARIANTS 796 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 797#endif 798 799 KASSERT(opcode == CPL_CLOSE_LISTSRV_RPL, 800 ("%s: unexpected opcode 0x%x", __func__, opcode)); 801 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 802 KASSERT(lctx->stid == stid, ("%s: lctx stid mismatch", __func__)); 803 804 CTR3(KTR_CXGBE, "%s: stid %u, status %u", __func__, stid, status); 805 806 if (status != CPL_ERR_NONE) { 807 log(LOG_ERR, "%s: failed (%u) to close listener for stid %u\n", 808 __func__, status, stid); 809 return (status); 810 } 811 812 INP_WLOCK(inp); 813 inp = release_lctx(sc, lctx); 814 if (inp != NULL) 815 INP_WUNLOCK(inp); 816 817 return (status); 818} 819 820static void 821done_with_synqe(struct adapter *sc, struct synq_entry *synqe) 822{ 823 struct listen_ctx *lctx = synqe->lctx; 824 struct inpcb *inp = lctx->inp; 825 struct port_info *pi = synqe->syn->m_pkthdr.rcvif->if_softc; 826 struct l2t_entry *e = &sc->l2t->l2tab[synqe->l2e_idx]; 827 828 INP_WLOCK_ASSERT(inp); 829 830 TAILQ_REMOVE(&lctx->synq, synqe, link); 831 inp = release_lctx(sc, lctx); 832 if (inp) 833 INP_WUNLOCK(inp); 834 remove_tid(sc, synqe->tid); 835 release_tid(sc, synqe->tid, &sc->sge.ctrlq[pi->port_id]); 836 t4_l2t_release(e); 837 release_synqe(synqe); /* removed from synq list */ 838} 839 840int 841do_abort_req_synqe(struct sge_iq *iq, const struct rss_header *rss, 842 struct mbuf *m) 843{ 844 struct adapter *sc = iq->adapter; 845 const struct cpl_abort_req_rss *cpl = (const void *)(rss + 1); 846 unsigned int tid = GET_TID(cpl); 847 struct synq_entry *synqe = lookup_tid(sc, tid); 848 struct listen_ctx *lctx = synqe->lctx; 849 struct inpcb *inp = lctx->inp; 850 int txqid; 851 struct sge_wrq *ofld_txq; 852#ifdef INVARIANTS 853 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 854#endif 855 856 KASSERT(opcode == CPL_ABORT_REQ_RSS, 857 ("%s: unexpected opcode 0x%x", __func__, opcode)); 858 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 859 KASSERT(synqe->tid == tid, ("%s: toep tid mismatch", __func__)); 860 861 CTR6(KTR_CXGBE, "%s: tid %u, synqe %p (0x%x), lctx %p, status %d", 862 __func__, tid, synqe, synqe->flags, synqe->lctx, cpl->status); 863 864 if (negative_advice(cpl->status)) 865 return (0); /* Ignore negative advice */ 866 867 INP_WLOCK(inp); 868 869 get_qids_from_mbuf(synqe->syn, &txqid, NULL); 870 ofld_txq = &sc->sge.ofld_txq[txqid]; 871 872 /* 873 * If we'd initiated an abort earlier the reply to it is responsible for 874 * cleaning up resources. Otherwise we tear everything down right here 875 * right now. We owe the T4 a CPL_ABORT_RPL no matter what. 876 */ 877 if (synqe->flags & TPF_ABORT_SHUTDOWN) { 878 INP_WUNLOCK(inp); 879 goto done; 880 } 881 882 done_with_synqe(sc, synqe); 883 /* inp lock released by done_with_synqe */ 884done: 885 send_abort_rpl(sc, ofld_txq, tid, CPL_ABORT_NO_RST); 886 return (0); 887} 888 889int 890do_abort_rpl_synqe(struct sge_iq *iq, const struct rss_header *rss, 891 struct mbuf *m) 892{ 893 struct adapter *sc = iq->adapter; 894 const struct cpl_abort_rpl_rss *cpl = (const void *)(rss + 1); 895 unsigned int tid = GET_TID(cpl); 896 struct synq_entry *synqe = lookup_tid(sc, tid); 897 struct listen_ctx *lctx = synqe->lctx; 898 struct inpcb *inp = lctx->inp; 899#ifdef INVARIANTS 900 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 901#endif 902 903 KASSERT(opcode == CPL_ABORT_RPL_RSS, 904 ("%s: unexpected opcode 0x%x", __func__, opcode)); 905 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 906 KASSERT(synqe->tid == tid, ("%s: toep tid mismatch", __func__)); 907 908 CTR6(KTR_CXGBE, "%s: tid %u, synqe %p (0x%x), lctx %p, status %d", 909 __func__, tid, synqe, synqe->flags, synqe->lctx, cpl->status); 910 911 INP_WLOCK(inp); 912 KASSERT(synqe->flags & TPF_ABORT_SHUTDOWN, 913 ("%s: wasn't expecting abort reply for synqe %p (0x%x)", 914 __func__, synqe, synqe->flags)); 915 916 done_with_synqe(sc, synqe); 917 /* inp lock released by done_with_synqe */ 918 919 return (0); 920} 921 922void 923t4_offload_socket(struct toedev *tod, void *arg, struct socket *so) 924{ 925 struct adapter *sc = tod->tod_softc; 926 struct synq_entry *synqe = arg; 927#ifdef INVARIANTS 928 struct inpcb *inp = sotoinpcb(so); 929#endif 930 struct cpl_pass_establish *cpl = mtod(synqe->syn, void *); 931 struct toepcb *toep = *(struct toepcb **)(cpl + 1); 932 933 INP_INFO_LOCK_ASSERT(&V_tcbinfo); /* prevents bad race with accept() */ 934 INP_WLOCK_ASSERT(inp); 935 KASSERT(synqe->flags & TPF_SYNQE, 936 ("%s: %p not a synq_entry?", __func__, arg)); 937 938 offload_socket(so, toep); 939 make_established(toep, cpl->snd_isn, cpl->rcv_isn, cpl->tcp_opt); 940 toep->flags |= TPF_CPL_PENDING; 941 update_tid(sc, synqe->tid, toep); 942 synqe->flags |= TPF_SYNQE_EXPANDED; 943} 944 945static inline void 946save_qids_in_mbuf(struct mbuf *m, struct port_info *pi) 947{ 948 uint32_t txqid, rxqid; 949 950 txqid = (arc4random() % pi->nofldtxq) + pi->first_ofld_txq; 951 rxqid = (arc4random() % pi->nofldrxq) + pi->first_ofld_rxq; 952 953 m->m_pkthdr.flowid = (txqid << 16) | (rxqid & 0xffff); 954} 955 956static inline void 957get_qids_from_mbuf(struct mbuf *m, int *txqid, int *rxqid) 958{ 959 960 if (txqid) 961 *txqid = m->m_pkthdr.flowid >> 16; 962 if (rxqid) 963 *rxqid = m->m_pkthdr.flowid & 0xffff; 964} 965 966/* 967 * Use the trailing space in the mbuf in which the PASS_ACCEPT_REQ arrived to 968 * store some state temporarily. 969 */ 970static struct synq_entry * 971mbuf_to_synqe(struct mbuf *m) 972{ 973 int len = roundup2(sizeof (struct synq_entry), 8); 974 int tspace = M_TRAILINGSPACE(m); 975 struct synq_entry *synqe = NULL; 976 977 if (tspace < len) { 978 synqe = malloc(sizeof(*synqe), M_CXGBE, M_NOWAIT); 979 if (synqe == NULL) 980 return (NULL); 981 synqe->flags = TPF_SYNQE | TPF_SYNQE_NEEDFREE; 982 } else { 983 synqe = (void *)(m->m_data + m->m_len + tspace - len); 984 synqe->flags = TPF_SYNQE; 985 } 986 987 return (synqe); 988} 989 990static void 991t4opt_to_tcpopt(const struct tcp_options *t4opt, struct tcpopt *to) 992{ 993 bzero(to, sizeof(*to)); 994 995 if (t4opt->mss) { 996 to->to_flags |= TOF_MSS; 997 to->to_mss = be16toh(t4opt->mss); 998 } 999 1000 if (t4opt->wsf) { 1001 to->to_flags |= TOF_SCALE; 1002 to->to_wscale = t4opt->wsf; 1003 } 1004 1005 if (t4opt->tstamp) 1006 to->to_flags |= TOF_TS; 1007 1008 if (t4opt->sack) 1009 to->to_flags |= TOF_SACKPERM; 1010} 1011 1012/* 1013 * Options2 for passive open. 1014 */ 1015static uint32_t 1016calc_opt2p(struct adapter *sc, struct port_info *pi, int rxqid, 1017 const struct tcp_options *tcpopt, struct tcphdr *th, int ulp_mode) 1018{ 1019 struct sge_ofld_rxq *ofld_rxq = &sc->sge.ofld_rxq[rxqid]; 1020 uint32_t opt2; 1021 1022 opt2 = V_TX_QUEUE(sc->params.tp.tx_modq[pi->tx_chan]) | 1023 F_RSS_QUEUE_VALID | V_RSS_QUEUE(ofld_rxq->iq.abs_id); 1024 1025 if (V_tcp_do_rfc1323) { 1026 if (tcpopt->tstamp) 1027 opt2 |= F_TSTAMPS_EN; 1028 if (tcpopt->sack) 1029 opt2 |= F_SACK_EN; 1030 if (tcpopt->wsf <= 14) 1031 opt2 |= F_WND_SCALE_EN; 1032 } 1033 1034 if (V_tcp_do_ecn && th->th_flags & (TH_ECE | TH_CWR)) 1035 opt2 |= F_CCTRL_ECN; 1036 1037 /* RX_COALESCE is always a valid value (0 or M_RX_COALESCE). */ 1038 if (is_t4(sc)) 1039 opt2 |= F_RX_COALESCE_VALID; 1040 else { 1041 opt2 |= F_T5_OPT_2_VALID; 1042 opt2 |= F_CONG_CNTRL_VALID; /* OPT_2_ISS really, for T5 */ 1043 } 1044 if (sc->tt.rx_coalesce) 1045 opt2 |= V_RX_COALESCE(M_RX_COALESCE); 1046 1047#ifdef USE_DDP_RX_FLOW_CONTROL 1048 if (ulp_mode == ULP_MODE_TCPDDP) 1049 opt2 |= F_RX_FC_VALID | F_RX_FC_DDP; 1050#endif 1051 1052 return htobe32(opt2); 1053} 1054 1055/* XXX: duplication. */ 1056static inline void 1057tcp_fields_to_host(struct tcphdr *th) 1058{ 1059 1060 th->th_seq = ntohl(th->th_seq); 1061 th->th_ack = ntohl(th->th_ack); 1062 th->th_win = ntohs(th->th_win); 1063 th->th_urp = ntohs(th->th_urp); 1064} 1065 1066static void 1067pass_accept_req_to_protohdrs(const struct mbuf *m, struct in_conninfo *inc, 1068 struct tcphdr *th) 1069{ 1070 const struct cpl_pass_accept_req *cpl = mtod(m, const void *); 1071 const struct ether_header *eh; 1072 unsigned int hlen = be32toh(cpl->hdr_len); 1073 uintptr_t l3hdr; 1074 const struct tcphdr *tcp; 1075 1076 eh = (const void *)(cpl + 1); 1077 l3hdr = ((uintptr_t)eh + G_ETH_HDR_LEN(hlen)); 1078 tcp = (const void *)(l3hdr + G_IP_HDR_LEN(hlen)); 1079 1080 if (inc) { 1081 bzero(inc, sizeof(*inc)); 1082 inc->inc_fport = tcp->th_sport; 1083 inc->inc_lport = tcp->th_dport; 1084 if (((struct ip *)l3hdr)->ip_v == IPVERSION) { 1085 const struct ip *ip = (const void *)l3hdr; 1086 1087 inc->inc_faddr = ip->ip_src; 1088 inc->inc_laddr = ip->ip_dst; 1089 } else { 1090 const struct ip6_hdr *ip6 = (const void *)l3hdr; 1091 1092 inc->inc_flags |= INC_ISIPV6; 1093 inc->inc6_faddr = ip6->ip6_src; 1094 inc->inc6_laddr = ip6->ip6_dst; 1095 } 1096 } 1097 1098 if (th) { 1099 bcopy(tcp, th, sizeof(*th)); 1100 tcp_fields_to_host(th); /* just like tcp_input */ 1101 } 1102} 1103 1104static int 1105ifnet_has_ip6(struct ifnet *ifp, struct in6_addr *ip6) 1106{ 1107 struct ifaddr *ifa; 1108 struct sockaddr_in6 *sin6; 1109 int found = 0; 1110 struct in6_addr in6 = *ip6; 1111 1112 /* Just as in ip6_input */ 1113 if (in6_clearscope(&in6) || in6_clearscope(&in6)) 1114 return (0); 1115 in6_setscope(&in6, ifp, NULL); 1116 1117 if_addr_rlock(ifp); 1118 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1119 sin6 = (void *)ifa->ifa_addr; 1120 if (sin6->sin6_family != AF_INET6) 1121 continue; 1122 1123 if (IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &in6)) { 1124 found = 1; 1125 break; 1126 } 1127 } 1128 if_addr_runlock(ifp); 1129 1130 return (found); 1131} 1132 1133static struct l2t_entry * 1134get_l2te_for_nexthop(struct port_info *pi, struct ifnet *ifp, 1135 struct in_conninfo *inc) 1136{ 1137 struct rtentry *rt; 1138 struct l2t_entry *e; 1139 struct sockaddr_in6 sin6; 1140 struct sockaddr *dst = (void *)&sin6; 1141 1142 if (inc->inc_flags & INC_ISIPV6) { 1143 dst->sa_len = sizeof(struct sockaddr_in6); 1144 dst->sa_family = AF_INET6; 1145 ((struct sockaddr_in6 *)dst)->sin6_addr = inc->inc6_faddr; 1146 1147 if (IN6_IS_ADDR_LINKLOCAL(&inc->inc6_laddr)) { 1148 /* no need for route lookup */ 1149 e = t4_l2t_get(pi, ifp, dst); 1150 return (e); 1151 } 1152 } else { 1153 dst->sa_len = sizeof(struct sockaddr_in); 1154 dst->sa_family = AF_INET; 1155 ((struct sockaddr_in *)dst)->sin_addr = inc->inc_faddr; 1156 } 1157 1158 rt = rtalloc1(dst, 0, 0); 1159 if (rt == NULL) 1160 return (NULL); 1161 else { 1162 struct sockaddr *nexthop; 1163 1164 RT_UNLOCK(rt); 1165 if (rt->rt_ifp != ifp) 1166 e = NULL; 1167 else { 1168 if (rt->rt_flags & RTF_GATEWAY) 1169 nexthop = rt->rt_gateway; 1170 else 1171 nexthop = dst; 1172 e = t4_l2t_get(pi, ifp, nexthop); 1173 } 1174 RTFREE(rt); 1175 } 1176 1177 return (e); 1178} 1179 1180static int 1181ifnet_has_ip(struct ifnet *ifp, struct in_addr in) 1182{ 1183 struct ifaddr *ifa; 1184 struct sockaddr_in *sin; 1185 int found = 0; 1186 1187 if_addr_rlock(ifp); 1188 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1189 sin = (void *)ifa->ifa_addr; 1190 if (sin->sin_family != AF_INET) 1191 continue; 1192 1193 if (sin->sin_addr.s_addr == in.s_addr) { 1194 found = 1; 1195 break; 1196 } 1197 } 1198 if_addr_runlock(ifp); 1199 1200 return (found); 1201} 1202 1203#define REJECT_PASS_ACCEPT() do { \ 1204 reject_reason = __LINE__; \ 1205 goto reject; \ 1206} while (0) 1207 1208/* 1209 * The context associated with a tid entry via insert_tid could be a synq_entry 1210 * or a toepcb. The only way CPL handlers can tell is via a bit in these flags. 1211 */ 1212CTASSERT(offsetof(struct toepcb, flags) == offsetof(struct synq_entry, flags)); 1213 1214/* 1215 * Incoming SYN on a listening socket. 1216 * 1217 * XXX: Every use of ifp in this routine has a bad race with up/down, toe/-toe, 1218 * etc. 1219 */ 1220static int 1221do_pass_accept_req(struct sge_iq *iq, const struct rss_header *rss, 1222 struct mbuf *m) 1223{ 1224 struct adapter *sc = iq->adapter; 1225 struct toedev *tod; 1226 const struct cpl_pass_accept_req *cpl = mtod(m, const void *); 1227 struct cpl_pass_accept_rpl *rpl; 1228 struct wrqe *wr; 1229 unsigned int stid = G_PASS_OPEN_TID(be32toh(cpl->tos_stid)); 1230 unsigned int tid = GET_TID(cpl); 1231 struct listen_ctx *lctx = lookup_stid(sc, stid); 1232 struct inpcb *inp; 1233 struct socket *so; 1234 struct in_conninfo inc; 1235 struct tcphdr th; 1236 struct tcpopt to; 1237 struct port_info *pi; 1238 struct ifnet *hw_ifp, *ifp; 1239 struct l2t_entry *e = NULL; 1240 int rscale, mtu_idx, rx_credits, rxqid, ulp_mode; 1241 struct synq_entry *synqe = NULL; 1242 int reject_reason; 1243 uint16_t vid; 1244#ifdef INVARIANTS 1245 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 1246#endif 1247 1248 KASSERT(opcode == CPL_PASS_ACCEPT_REQ, 1249 ("%s: unexpected opcode 0x%x", __func__, opcode)); 1250 KASSERT(lctx->stid == stid, ("%s: lctx stid mismatch", __func__)); 1251 1252 CTR4(KTR_CXGBE, "%s: stid %u, tid %u, lctx %p", __func__, stid, tid, 1253 lctx); 1254 1255 pass_accept_req_to_protohdrs(m, &inc, &th); 1256 t4opt_to_tcpopt(&cpl->tcpopt, &to); 1257 1258 pi = sc->port[G_SYN_INTF(be16toh(cpl->l2info))]; 1259 hw_ifp = pi->ifp; /* the cxgbeX ifnet */ 1260 m->m_pkthdr.rcvif = hw_ifp; 1261 tod = TOEDEV(hw_ifp); 1262 1263 /* 1264 * Figure out if there is a pseudo interface (vlan, lagg, etc.) 1265 * involved. Don't offload if the SYN had a VLAN tag and the vid 1266 * doesn't match anything on this interface. 1267 * 1268 * XXX: lagg support, lagg + vlan support. 1269 */ 1270 vid = EVL_VLANOFTAG(be16toh(cpl->vlan)); 1271 if (vid != 0xfff) { 1272 ifp = VLAN_DEVAT(hw_ifp, vid); 1273 if (ifp == NULL) 1274 REJECT_PASS_ACCEPT(); 1275 } else 1276 ifp = hw_ifp; 1277 1278 /* 1279 * Don't offload if the peer requested a TCP option that's not known to 1280 * the silicon. 1281 */ 1282 if (cpl->tcpopt.unknown) 1283 REJECT_PASS_ACCEPT(); 1284 1285 if (inc.inc_flags & INC_ISIPV6) { 1286 1287 /* Don't offload if the ifcap isn't enabled */ 1288 if ((ifp->if_capenable & IFCAP_TOE6) == 0) 1289 REJECT_PASS_ACCEPT(); 1290 1291 /* 1292 * SYN must be directed to an IP6 address on this ifnet. This 1293 * is more restrictive than in6_localip. 1294 */ 1295 if (!ifnet_has_ip6(ifp, &inc.inc6_laddr)) 1296 REJECT_PASS_ACCEPT(); 1297 } else { 1298 1299 /* Don't offload if the ifcap isn't enabled */ 1300 if ((ifp->if_capenable & IFCAP_TOE4) == 0) 1301 REJECT_PASS_ACCEPT(); 1302 1303 /* 1304 * SYN must be directed to an IP address on this ifnet. This 1305 * is more restrictive than in_localip. 1306 */ 1307 if (!ifnet_has_ip(ifp, inc.inc_laddr)) 1308 REJECT_PASS_ACCEPT(); 1309 } 1310 1311 e = get_l2te_for_nexthop(pi, ifp, &inc); 1312 if (e == NULL) 1313 REJECT_PASS_ACCEPT(); 1314 1315 synqe = mbuf_to_synqe(m); 1316 if (synqe == NULL) 1317 REJECT_PASS_ACCEPT(); 1318 1319 wr = alloc_wrqe(is_t4(sc) ? sizeof(struct cpl_pass_accept_rpl) : 1320 sizeof(struct cpl_t5_pass_accept_rpl), &sc->sge.ctrlq[pi->port_id]); 1321 if (wr == NULL) 1322 REJECT_PASS_ACCEPT(); 1323 rpl = wrtod(wr); 1324 1325 INP_INFO_WLOCK(&V_tcbinfo); /* for 4-tuple check, syncache_add */ 1326 1327 /* Don't offload if the 4-tuple is already in use */ 1328 if (toe_4tuple_check(&inc, &th, ifp) != 0) { 1329 INP_INFO_WUNLOCK(&V_tcbinfo); 1330 free(wr, M_CXGBE); 1331 REJECT_PASS_ACCEPT(); 1332 } 1333 1334 inp = lctx->inp; /* listening socket, not owned by TOE */ 1335 INP_WLOCK(inp); 1336 1337 /* Don't offload if the listening socket has closed */ 1338 if (__predict_false(inp->inp_flags & INP_DROPPED)) { 1339 /* 1340 * The listening socket has closed. The reply from the TOE to 1341 * our CPL_CLOSE_LISTSRV_REQ will ultimately release all 1342 * resources tied to this listen context. 1343 */ 1344 INP_WUNLOCK(inp); 1345 INP_INFO_WUNLOCK(&V_tcbinfo); 1346 free(wr, M_CXGBE); 1347 REJECT_PASS_ACCEPT(); 1348 } 1349 so = inp->inp_socket; 1350 1351 mtu_idx = find_best_mtu_idx(sc, &inc, be16toh(cpl->tcpopt.mss)); 1352 rscale = cpl->tcpopt.wsf && V_tcp_do_rfc1323 ? select_rcv_wscale() : 0; 1353 SOCKBUF_LOCK(&so->so_rcv); 1354 /* opt0 rcv_bufsiz initially, assumes its normal meaning later */ 1355 rx_credits = min(select_rcv_wnd(so) >> 10, M_RCV_BUFSIZ); 1356 SOCKBUF_UNLOCK(&so->so_rcv); 1357 1358 save_qids_in_mbuf(m, pi); 1359 get_qids_from_mbuf(m, NULL, &rxqid); 1360 1361 if (is_t4(sc)) 1362 INIT_TP_WR_MIT_CPL(rpl, CPL_PASS_ACCEPT_RPL, tid); 1363 else { 1364 struct cpl_t5_pass_accept_rpl *rpl5 = (void *)rpl; 1365 1366 INIT_TP_WR_MIT_CPL(rpl5, CPL_PASS_ACCEPT_RPL, tid); 1367 } 1368 if (sc->tt.ddp && (so->so_options & SO_NO_DDP) == 0) { 1369 ulp_mode = ULP_MODE_TCPDDP; 1370 synqe->flags |= TPF_SYNQE_TCPDDP; 1371 } else 1372 ulp_mode = ULP_MODE_NONE; 1373 rpl->opt0 = calc_opt0(so, pi, e, mtu_idx, rscale, rx_credits, ulp_mode); 1374 rpl->opt2 = calc_opt2p(sc, pi, rxqid, &cpl->tcpopt, &th, ulp_mode); 1375 1376 synqe->tid = tid; 1377 synqe->lctx = lctx; 1378 synqe->syn = m; 1379 m = NULL; 1380 refcount_init(&synqe->refcnt, 1); /* 1 means extra hold */ 1381 synqe->l2e_idx = e->idx; 1382 synqe->rcv_bufsize = rx_credits; 1383 atomic_store_rel_ptr(&synqe->wr, (uintptr_t)wr); 1384 1385 insert_tid(sc, tid, synqe); 1386 TAILQ_INSERT_TAIL(&lctx->synq, synqe, link); 1387 hold_synqe(synqe); /* hold for the duration it's in the synq */ 1388 hold_lctx(lctx); /* A synqe on the list has a ref on its lctx */ 1389 1390 /* 1391 * If all goes well t4_syncache_respond will get called during 1392 * syncache_add. Also note that syncache_add releases both pcbinfo and 1393 * pcb locks. 1394 */ 1395 toe_syncache_add(&inc, &to, &th, inp, tod, synqe); 1396 INP_UNLOCK_ASSERT(inp); /* ok to assert, we have a ref on the inp */ 1397 INP_INFO_UNLOCK_ASSERT(&V_tcbinfo); 1398 1399 /* 1400 * If we replied during syncache_add (synqe->wr has been consumed), 1401 * good. Otherwise, set it to 0 so that further syncache_respond 1402 * attempts by the kernel will be ignored. 1403 */ 1404 if (atomic_cmpset_ptr(&synqe->wr, (uintptr_t)wr, 0)) { 1405 1406 /* 1407 * syncache may or may not have a hold on the synqe, which may 1408 * or may not be stashed in the original SYN mbuf passed to us. 1409 * Just copy it over instead of dealing with all possibilities. 1410 */ 1411 m = m_dup(synqe->syn, M_NOWAIT); 1412 if (m) 1413 m->m_pkthdr.rcvif = hw_ifp; 1414 1415 remove_tid(sc, synqe->tid); 1416 free(wr, M_CXGBE); 1417 1418 /* Yank the synqe out of the lctx synq. */ 1419 INP_WLOCK(inp); 1420 TAILQ_REMOVE(&lctx->synq, synqe, link); 1421 release_synqe(synqe); /* removed from synq list */ 1422 inp = release_lctx(sc, lctx); 1423 if (inp) 1424 INP_WUNLOCK(inp); 1425 1426 release_synqe(synqe); /* extra hold */ 1427 REJECT_PASS_ACCEPT(); 1428 } 1429 1430 CTR5(KTR_CXGBE, "%s: stid %u, tid %u, lctx %p, synqe %p, SYNACK", 1431 __func__, stid, tid, lctx, synqe); 1432 1433 INP_WLOCK(inp); 1434 synqe->flags |= TPF_SYNQE_HAS_L2TE; 1435 if (__predict_false(inp->inp_flags & INP_DROPPED)) { 1436 /* 1437 * Listening socket closed but tod_listen_stop did not abort 1438 * this tid because there was no L2T entry for the tid at that 1439 * time. Abort it now. The reply to the abort will clean up. 1440 */ 1441 CTR6(KTR_CXGBE, 1442 "%s: stid %u, tid %u, lctx %p, synqe %p (0x%x), ABORT", 1443 __func__, stid, tid, lctx, synqe, synqe->flags); 1444 if (!(synqe->flags & TPF_SYNQE_EXPANDED)) 1445 send_reset_synqe(tod, synqe); 1446 INP_WUNLOCK(inp); 1447 1448 release_synqe(synqe); /* extra hold */ 1449 return (__LINE__); 1450 } 1451 INP_WUNLOCK(inp); 1452 1453 release_synqe(synqe); /* extra hold */ 1454 return (0); 1455reject: 1456 CTR4(KTR_CXGBE, "%s: stid %u, tid %u, REJECT (%d)", __func__, stid, tid, 1457 reject_reason); 1458 1459 if (e) 1460 t4_l2t_release(e); 1461 release_tid(sc, tid, lctx->ctrlq); 1462 1463 if (__predict_true(m != NULL)) { 1464 m_adj(m, sizeof(*cpl)); 1465 m->m_pkthdr.csum_flags |= (CSUM_IP_CHECKED | CSUM_IP_VALID | 1466 CSUM_DATA_VALID | CSUM_PSEUDO_HDR); 1467 m->m_pkthdr.csum_data = 0xffff; 1468 hw_ifp->if_input(hw_ifp, m); 1469 } 1470 1471 return (reject_reason); 1472} 1473 1474static void 1475synqe_to_protohdrs(struct synq_entry *synqe, 1476 const struct cpl_pass_establish *cpl, struct in_conninfo *inc, 1477 struct tcphdr *th, struct tcpopt *to) 1478{ 1479 uint16_t tcp_opt = be16toh(cpl->tcp_opt); 1480 1481 /* start off with the original SYN */ 1482 pass_accept_req_to_protohdrs(synqe->syn, inc, th); 1483 1484 /* modify parts to make it look like the ACK to our SYN|ACK */ 1485 th->th_flags = TH_ACK; 1486 th->th_ack = synqe->iss + 1; 1487 th->th_seq = be32toh(cpl->rcv_isn); 1488 bzero(to, sizeof(*to)); 1489 if (G_TCPOPT_TSTAMP(tcp_opt)) { 1490 to->to_flags |= TOF_TS; 1491 to->to_tsecr = synqe->ts; 1492 } 1493} 1494 1495static int 1496do_pass_establish(struct sge_iq *iq, const struct rss_header *rss, 1497 struct mbuf *m) 1498{ 1499 struct adapter *sc = iq->adapter; 1500 struct port_info *pi; 1501 struct ifnet *ifp; 1502 const struct cpl_pass_establish *cpl = (const void *)(rss + 1); 1503#if defined(KTR) || defined(INVARIANTS) 1504 unsigned int stid = G_PASS_OPEN_TID(be32toh(cpl->tos_stid)); 1505#endif 1506 unsigned int tid = GET_TID(cpl); 1507 struct synq_entry *synqe = lookup_tid(sc, tid); 1508 struct listen_ctx *lctx = synqe->lctx; 1509 struct inpcb *inp = lctx->inp; 1510 struct socket *so; 1511 struct tcphdr th; 1512 struct tcpopt to; 1513 struct in_conninfo inc; 1514 struct toepcb *toep; 1515 u_int txqid, rxqid; 1516#ifdef INVARIANTS 1517 unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl))); 1518#endif 1519 1520 KASSERT(opcode == CPL_PASS_ESTABLISH, 1521 ("%s: unexpected opcode 0x%x", __func__, opcode)); 1522 KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__)); 1523 KASSERT(lctx->stid == stid, ("%s: lctx stid mismatch", __func__)); 1524 KASSERT(synqe->flags & TPF_SYNQE, 1525 ("%s: tid %u (ctx %p) not a synqe", __func__, tid, synqe)); 1526 1527 INP_INFO_WLOCK(&V_tcbinfo); /* for syncache_expand */ 1528 INP_WLOCK(inp); 1529 1530 CTR6(KTR_CXGBE, 1531 "%s: stid %u, tid %u, synqe %p (0x%x), inp_flags 0x%x", 1532 __func__, stid, tid, synqe, synqe->flags, inp->inp_flags); 1533 1534 if (__predict_false(inp->inp_flags & INP_DROPPED)) { 1535 1536 if (synqe->flags & TPF_SYNQE_HAS_L2TE) { 1537 KASSERT(synqe->flags & TPF_ABORT_SHUTDOWN, 1538 ("%s: listen socket closed but tid %u not aborted.", 1539 __func__, tid)); 1540 } 1541 1542 INP_WUNLOCK(inp); 1543 INP_INFO_WUNLOCK(&V_tcbinfo); 1544 return (0); 1545 } 1546 1547 ifp = synqe->syn->m_pkthdr.rcvif; 1548 pi = ifp->if_softc; 1549 KASSERT(pi->adapter == sc, 1550 ("%s: pi %p, sc %p mismatch", __func__, pi, sc)); 1551 1552 get_qids_from_mbuf(synqe->syn, &txqid, &rxqid); 1553 KASSERT(rxqid == iq_to_ofld_rxq(iq) - &sc->sge.ofld_rxq[0], 1554 ("%s: CPL arrived on unexpected rxq. %d %d", __func__, rxqid, 1555 (int)(iq_to_ofld_rxq(iq) - &sc->sge.ofld_rxq[0]))); 1556 1557 toep = alloc_toepcb(pi, txqid, rxqid, M_NOWAIT); 1558 if (toep == NULL) { 1559reset: 1560 /* 1561 * The reply to this abort will perform final cleanup. There is 1562 * no need to check for HAS_L2TE here. We can be here only if 1563 * we responded to the PASS_ACCEPT_REQ, and our response had the 1564 * L2T idx. 1565 */ 1566 send_reset_synqe(TOEDEV(ifp), synqe); 1567 INP_WUNLOCK(inp); 1568 INP_INFO_WUNLOCK(&V_tcbinfo); 1569 return (0); 1570 } 1571 toep->tid = tid; 1572 toep->l2te = &sc->l2t->l2tab[synqe->l2e_idx]; 1573 if (synqe->flags & TPF_SYNQE_TCPDDP) 1574 set_tcpddp_ulp_mode(toep); 1575 else 1576 toep->ulp_mode = ULP_MODE_NONE; 1577 /* opt0 rcv_bufsiz initially, assumes its normal meaning later */ 1578 toep->rx_credits = synqe->rcv_bufsize; 1579 1580 so = inp->inp_socket; 1581 KASSERT(so != NULL, ("%s: socket is NULL", __func__)); 1582 1583 /* Come up with something that syncache_expand should be ok with. */ 1584 synqe_to_protohdrs(synqe, cpl, &inc, &th, &to); 1585 1586 /* 1587 * No more need for anything in the mbuf that carried the 1588 * CPL_PASS_ACCEPT_REQ. Drop the CPL_PASS_ESTABLISH and toep pointer 1589 * there. XXX: bad form but I don't want to increase the size of synqe. 1590 */ 1591 m = synqe->syn; 1592 KASSERT(sizeof(*cpl) + sizeof(toep) <= m->m_len, 1593 ("%s: no room in mbuf %p (m_len %d)", __func__, m, m->m_len)); 1594 bcopy(cpl, mtod(m, void *), sizeof(*cpl)); 1595 *(struct toepcb **)(mtod(m, struct cpl_pass_establish *) + 1) = toep; 1596 1597 if (!toe_syncache_expand(&inc, &to, &th, &so) || so == NULL) { 1598 free_toepcb(toep); 1599 goto reset; 1600 } 1601 1602 /* 1603 * This is for the unlikely case where the syncache entry that we added 1604 * has been evicted from the syncache, but the syncache_expand above 1605 * works because of syncookies. 1606 * 1607 * XXX: we've held the tcbinfo lock throughout so there's no risk of 1608 * anyone accept'ing a connection before we've installed our hooks, but 1609 * this somewhat defeats the purpose of having a tod_offload_socket :-( 1610 */ 1611 if (__predict_false(!(synqe->flags & TPF_SYNQE_EXPANDED))) { 1612 struct inpcb *new_inp = sotoinpcb(so); 1613 1614 INP_WLOCK(new_inp); 1615 tcp_timer_activate(intotcpcb(new_inp), TT_KEEP, 0); 1616 t4_offload_socket(TOEDEV(ifp), synqe, so); 1617 INP_WUNLOCK(new_inp); 1618 } 1619 1620 /* Done with the synqe */ 1621 TAILQ_REMOVE(&lctx->synq, synqe, link); 1622 inp = release_lctx(sc, lctx); 1623 if (inp != NULL) 1624 INP_WUNLOCK(inp); 1625 INP_INFO_WUNLOCK(&V_tcbinfo); 1626 release_synqe(synqe); 1627 1628 return (0); 1629} 1630 1631void 1632t4_init_listen_cpl_handlers(struct adapter *sc) 1633{ 1634 1635 t4_register_cpl_handler(sc, CPL_PASS_OPEN_RPL, do_pass_open_rpl); 1636 t4_register_cpl_handler(sc, CPL_CLOSE_LISTSRV_RPL, do_close_server_rpl); 1637 t4_register_cpl_handler(sc, CPL_PASS_ACCEPT_REQ, do_pass_accept_req); 1638 t4_register_cpl_handler(sc, CPL_PASS_ESTABLISH, do_pass_establish); 1639} 1640#endif 1641