1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 /* 29 * Portions of this source code were derived from Berkeley 30 * 4.3 BSD under license from the Regents of the University of 31 * California. 32 */ 33 34 /* Copyright (c) 2006, The Ohio State University. All rights reserved. 35 * 36 * Portions of this source code is developed by the team members of 37 * The Ohio State University's Network-Based Computing Laboratory (NBCL), 38 * headed by Professor Dhabaleswar K. (DK) Panda. 39 * 40 * Acknowledgements to contributions from developors: 41 * Ranjit Noronha: noronha@cse.ohio-state.edu 42 * Lei Chai : chail@cse.ohio-state.edu 43 * Weikuan Yu : yuw@cse.ohio-state.edu 44 * 45 */ 46 47 #pragma ident "@(#)svc_rdma.c 1.8 05/06/10 SMI" 48 49 /* 50 * Server side of RPC over RDMA in the kernel. 51 */ 52 53 #include <sys/param.h> 54 #include <sys/types.h> 55 #include <sys/user.h> 56 #include <sys/sysmacros.h> 57 #include <sys/proc.h> 58 #include <sys/file.h> 59 #include <sys/errno.h> 60 #include <sys/kmem.h> 61 #include <sys/debug.h> 62 #include <sys/systm.h> 63 #include <sys/cmn_err.h> 64 #include <sys/kstat.h> 65 #include <sys/vtrace.h> 66 #include <sys/debug.h> 67 68 #include <rpc/types.h> 69 #include <rpc/xdr.h> 70 #include <rpc/auth.h> 71 #include <rpc/clnt.h> 72 #include <rpc/rpc_msg.h> 73 #include <rpc/svc.h> 74 #include <rpc/rpc_rdma.h> 75 #include <sys/ddi.h> 76 #include <sys/sunddi.h> 77 78 #include <inet/common.h> 79 #include <inet/ip.h> 80 #include <inet/ip6.h> 81 82 #include <nfs/nfs.h> 83 84 #define SVC_RDMA_SUCCESS 0 85 #define SVC_RDMA_FAIL -1 86 87 #define SVC_CREDIT_FACTOR (0.5) 88 89 uint32_t rdma_bufs_granted = RDMA_BUFS_GRANT; 90 extern xdrproc_t x_READ3res; 91 92 /* 93 * RDMA transport specific data associated with SVCMASTERXPRT 94 */ 95 struct rdma_data { 96 SVCMASTERXPRT *rd_xprt; /* back ptr to SVCMASTERXPRT */ 97 struct rdma_svc_data rd_data; /* rdma data */ 98 rdma_mod_t *r_mod; /* RDMA module containing ops ptr */ 99 }; 100 101 /* 102 * Plugin connection specific data stashed away in clone SVCXPRT 103 */ 104 struct clone_rdma_data { 105 CONN *conn; /* RDMA connection */ 106 rdma_buf_t rpcbuf; /* RPC req/resp buffer */ 107 struct clist *reply_cl; /* reply chunk buffer info */ 108 struct clist *wlist; /* write list clist */ 109 }; 110 111 #ifdef DEBUG 112 int rdma_svc_debug = 0; 113 #endif 114 115 #define MAXADDRLEN 128 /* max length for address mask */ 116 117 /* 118 * Routines exported through ops vector. 119 */ 120 static bool_t svc_rdma_krecv(SVCXPRT *, mblk_t *, struct rpc_msg *); 121 static bool_t svc_rdma_ksend(SVCXPRT *, struct rpc_msg *); 122 static bool_t svc_rdma_kgetargs(SVCXPRT *, xdrproc_t, caddr_t); 123 static bool_t svc_rdma_kfreeargs(SVCXPRT *, xdrproc_t, caddr_t); 124 void svc_rdma_kdestroy(SVCMASTERXPRT *); 125 static int svc_rdma_kdup(struct svc_req *, caddr_t, int, 126 struct dupreq **, bool_t *); 127 static void svc_rdma_kdupdone(struct dupreq *, caddr_t, 128 void (*)(), int, int); 129 static int32_t *svc_rdma_kgetres(SVCXPRT *, int); 130 static void svc_rdma_kfreeres(SVCXPRT *); 131 static void svc_rdma_kclone_destroy(SVCXPRT *); 132 static void svc_rdma_kstart(SVCMASTERXPRT *); 133 void svc_rdma_kstop(SVCMASTERXPRT *); 134 135 static int svc_process_wlist(struct clone_rdma_data *, xdrproc_t, 136 caddr_t, int *, unsigned int *); 137 138 static int svc_process_long_reply(SVCXPRT *, CONN *, xdrproc_t, 139 caddr_t, caddr_t vd, XDR **, 140 struct rpc_msg *, bool_t, int *, 141 int *, int *, unsigned int *); 142 143 static int svc_compose_rpcmsg(SVCXPRT *, CONN *, xdrproc_t, caddr_t, 144 rdma_buf_t *, XDR **, struct rpc_msg *, 145 bool_t, int *, unsigned int *); 146 #ifdef DYNAMIC_CREDIT_CONTROL 147 static void svc_consume_credit(CONN *); 148 static void svc_compute_credit(CONN *, uint32_t, int, int, int *); 149 static void svc_update_credit(CONN * , int); 150 static void svc_grant_credit(CONN *, uint32_t *); 151 #endif 152 153 /* 154 * Server transport operations vector. 155 */ 156 struct svc_ops rdma_svc_ops = { 157 svc_rdma_krecv, /* Get requests */ 158 svc_rdma_kgetargs, /* Deserialize arguments */ 159 svc_rdma_ksend, /* Send reply */ 160 svc_rdma_kfreeargs, /* Free argument data space */ 161 svc_rdma_kdestroy, /* Destroy transport handle */ 162 svc_rdma_kdup, /* Check entry in dup req cache */ 163 svc_rdma_kdupdone, /* Mark entry in dup req cache as done */ 164 svc_rdma_kgetres, /* Get pointer to response buffer */ 165 svc_rdma_kfreeres, /* Destroy pre-serialized response header */ 166 svc_rdma_kclone_destroy, /* Destroy a clone xprt */ 167 svc_rdma_kstart, /* Tell `ready-to-receive' to rpcmod */ 168 rdma_get_wchunk_seg 169 }; 170 171 /* 172 * Server statistics 173 * NOTE: This structure type is duplicated in the NFS fast path. 174 */ 175 struct { 176 kstat_named_t rscalls; 177 kstat_named_t rsbadcalls; 178 kstat_named_t rsnullrecv; 179 kstat_named_t rsbadlen; 180 kstat_named_t rsxdrcall; 181 kstat_named_t rsdupchecks; 182 kstat_named_t rsdupreqs; 183 kstat_named_t rslongrpcs; 184 } rdmarsstat = { 185 { "calls", KSTAT_DATA_UINT64 }, 186 { "badcalls", KSTAT_DATA_UINT64 }, 187 { "nullrecv", KSTAT_DATA_UINT64 }, 188 { "badlen", KSTAT_DATA_UINT64 }, 189 { "xdrcall", KSTAT_DATA_UINT64 }, 190 { "dupchecks", KSTAT_DATA_UINT64 }, 191 { "dupreqs", KSTAT_DATA_UINT64 }, 192 { "longrpcs", KSTAT_DATA_UINT64 } 193 }; 194 195 kstat_named_t *rdmarsstat_ptr = (kstat_named_t *)&rdmarsstat; 196 uint_t rdmarsstat_ndata = sizeof (rdmarsstat) / sizeof (kstat_named_t); 197 198 #define RSSTAT_INCR(x) rdmarsstat.x.value.ui64++ 199 200 /* 201 * Create a transport record. 202 * The transport record, output buffer, and private data structure 203 * are allocated. The output buffer is serialized into using xdrmem. 204 * There is one transport record per user process which implements a 205 * set of services. 206 */ 207 /* ARGSUSED */ 208 int 209 svc_rdma_kcreate(char *netid, SVC_CALLOUT_TABLE *sct, int id, 210 rdma_xprt_group_t *started_xprts) 211 { 212 int error; 213 SVCMASTERXPRT *xprt; 214 struct rdma_data *rd; 215 rdma_registry_t *rmod; 216 rdma_xprt_record_t *xprt_rec; 217 queue_t *q; 218 219 mutex_enter(&rdma_modload_lock); 220 error = rdma_modload(); 221 mutex_exit(&rdma_modload_lock); 222 223 /* 224 * modload the RDMA plugins is not already done. 225 */ 226 if (!rdma_modloaded) { 227 mutex_enter(&rdma_modload_lock); 228 if (!rdma_modloaded) { 229 error = rdma_modload(); 230 } 231 mutex_exit(&rdma_modload_lock); 232 233 if (error) 234 return (error); 235 } 236 237 /* 238 * master_xprt_count is the count of master transport handles 239 * that were successfully created and are ready to recieve for 240 * RDMA based access. 241 */ 242 error = 0; 243 xprt_rec = NULL; 244 rw_enter(&rdma_lock, RW_READER); 245 if (rdma_mod_head == NULL) { 246 started_xprts->rtg_count = 0; 247 rw_exit(&rdma_lock); 248 if (rdma_dev_available) 249 return (EPROTONOSUPPORT); 250 else 251 return (ENODEV); 252 } 253 254 /* 255 * If we have reached here, then atleast one RDMA plugin has loaded. 256 * Create a master_xprt, make it start listenining on the device, 257 * if an error is generated, record it, we might need to shut 258 * the master_xprt. 259 * SVC_START() calls svc_rdma_kstart which calls plugin binding 260 * routines. 261 */ 262 for (rmod = rdma_mod_head; rmod != NULL; rmod = rmod->r_next) { 263 264 /* 265 * One SVCMASTERXPRT per RDMA plugin. 266 */ 267 xprt = kmem_zalloc(sizeof (*xprt), KM_SLEEP); 268 xprt->xp_ops = &rdma_svc_ops; 269 xprt->xp_sct = sct; 270 xprt->xp_type = T_RDMA; 271 mutex_init(&xprt->xp_req_lock, NULL, MUTEX_DEFAULT, NULL); 272 mutex_init(&xprt->xp_thread_lock, NULL, MUTEX_DEFAULT, NULL); 273 xprt->xp_req_head = (mblk_t *)0; 274 xprt->xp_req_tail = (mblk_t *)0; 275 xprt->xp_threads = 0; 276 xprt->xp_detached_threads = 0; 277 278 rd = kmem_zalloc(sizeof (*rd), KM_SLEEP); 279 xprt->xp_p2 = (caddr_t)rd; 280 rd->rd_xprt = xprt; 281 rd->r_mod = rmod->r_mod; 282 283 q = &rd->rd_data.q; 284 xprt->xp_wq = q; 285 q->q_ptr = &rd->rd_xprt; 286 xprt->xp_netid = NULL; 287 288 if (netid != NULL) { 289 xprt->xp_netid = kmem_alloc(strlen(netid) + 1, 290 KM_SLEEP); 291 (void) strcpy(xprt->xp_netid, netid); 292 } 293 294 xprt->xp_addrmask.maxlen = 295 xprt->xp_addrmask.len = sizeof (struct sockaddr_in); 296 xprt->xp_addrmask.buf = 297 kmem_zalloc(xprt->xp_addrmask.len, KM_SLEEP); 298 ((struct sockaddr_in *)xprt->xp_addrmask.buf)->sin_addr.s_addr = 299 (uint32_t)~0; 300 ((struct sockaddr_in *)xprt->xp_addrmask.buf)->sin_family = 301 (ushort_t)~0; 302 303 /* 304 * Each of the plugins will have their own Service ID 305 * to listener specific mapping, like port number for VI 306 * and service name for IB. 307 */ 308 rd->rd_data.svcid = id; 309 error = svc_xprt_register(xprt, id); 310 if (error) { 311 cmn_err(CE_WARN, "svc_rdma_kcreate: svc_xprt_register" 312 "failed"); 313 goto cleanup; 314 } 315 316 SVC_START(xprt); 317 if (!rd->rd_data.active) { 318 svc_xprt_unregister(xprt); 319 error = rd->rd_data.err_code; 320 goto cleanup; 321 } 322 323 /* 324 * This is set only when there is atleast one or more 325 * transports successfully created. We insert the pointer 326 * to the created RDMA master xprt into a separately maintained 327 * list. This way we can easily reference it later to cleanup, 328 * when NFS kRPC service pool is going away/unregistered. 329 */ 330 started_xprts->rtg_count ++; 331 xprt_rec = kmem_alloc(sizeof (*xprt_rec), KM_SLEEP); 332 xprt_rec->rtr_xprt_ptr = xprt; 333 xprt_rec->rtr_next = started_xprts->rtg_listhead; 334 started_xprts->rtg_listhead = xprt_rec; 335 continue; 336 cleanup: 337 SVC_DESTROY(xprt); 338 if (error == RDMA_FAILED) 339 error = EPROTONOSUPPORT; 340 } 341 342 rw_exit(&rdma_lock); 343 344 /* 345 * Don't return any error even if a single plugin was started 346 * successfully. 347 */ 348 if (started_xprts->rtg_count == 0) 349 return (error); 350 return (0); 351 } 352 353 /* 354 * Cleanup routine for freeing up memory allocated by 355 * svc_rdma_kcreate() 356 */ 357 void 358 svc_rdma_kdestroy(SVCMASTERXPRT *xprt) 359 { 360 struct rdma_data *rd = (struct rdma_data *)xprt->xp_p2; 361 362 363 mutex_destroy(&xprt->xp_req_lock); 364 mutex_destroy(&xprt->xp_thread_lock); 365 kmem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1); 366 kmem_free(rd, sizeof (*rd)); 367 kmem_free(xprt->xp_addrmask.buf, xprt->xp_addrmask.maxlen); 368 kmem_free(xprt, sizeof (*xprt)); 369 } 370 371 372 static void 373 svc_rdma_kstart(SVCMASTERXPRT *xprt) 374 { 375 struct rdma_svc_data *svcdata; 376 rdma_mod_t *rmod; 377 378 svcdata = &((struct rdma_data *)xprt->xp_p2)->rd_data; 379 rmod = ((struct rdma_data *)xprt->xp_p2)->r_mod; 380 381 /* 382 * Create a listener for module at this port 383 */ 384 385 (*rmod->rdma_ops->rdma_svc_listen)(svcdata); 386 } 387 388 void 389 svc_rdma_kstop(SVCMASTERXPRT *xprt) 390 { 391 struct rdma_svc_data *svcdata; 392 rdma_mod_t *rmod; 393 394 svcdata = &((struct rdma_data *)xprt->xp_p2)->rd_data; 395 rmod = ((struct rdma_data *)xprt->xp_p2)->r_mod; 396 397 /* 398 * Call the stop listener routine for each plugin. 399 */ 400 (*rmod->rdma_ops->rdma_svc_stop)(svcdata); 401 if (svcdata->active) 402 cmn_err(CE_WARN, "rdma_stop: Failed to shutdown RDMA based kRPC" 403 " listener"); 404 } 405 406 /* ARGSUSED */ 407 static void 408 svc_rdma_kclone_destroy(SVCXPRT *clone_xprt) 409 { 410 } 411 412 static bool_t 413 svc_rdma_krecv(SVCXPRT *clone_xprt, mblk_t *mp, struct rpc_msg *msg) 414 { 415 XDR *xdrs; 416 CONN *conn; 417 418 struct recv_data *rdp = (struct recv_data *)mp->b_rptr; 419 struct clone_rdma_data *vd; 420 struct clist *cl = NULL; 421 struct clist *wcl = NULL; 422 struct clist *repcl = NULL; 423 struct clist *cllong = NULL; 424 425 rdma_stat status; 426 rdma_srv_cred_ctrl_t *cc_info; 427 428 uint32_t vers, op, pos, xid; 429 uint32_t rdma_credit; 430 uint32_t wcl_total_length = 0; 431 bool_t wwl= FALSE; 432 int i, numclnts, availbufs, to_be_posted; 433 #ifdef SERVER_REG_CACHE 434 rib_lrc_entry_t *long_reply_buf = NULL; 435 #endif 436 vd = (struct clone_rdma_data *)clone_xprt->xp_p2buf; 437 RSSTAT_INCR(rscalls); 438 conn = rdp->conn; 439 440 #ifdef DYNAMIC_CREDIT_CONTROL 441 RDMA_GET_RESOURCE_INFO(conn, &numclnts, &availbufs); 442 svc_consume_credit(conn); 443 #else 444 status = rdma_svc_postrecv(conn); 445 if (status != RDMA_SUCCESS) { 446 cmn_err(CE_NOTE, 447 "svc_rdma_krecv: rdma_svc_postrecv failed %d", status); 448 goto badrpc_call; 449 } 450 #endif 451 452 xdrs = &clone_xprt->xp_xdrin; 453 xdrmem_create(xdrs, rdp->rpcmsg.addr, rdp->rpcmsg.len, XDR_DECODE); 454 xid = *(uint32_t *)rdp->rpcmsg.addr; 455 XDR_SETPOS(xdrs, sizeof (uint32_t)); 456 457 if (! xdr_u_int(xdrs, &vers) || 458 ! xdr_u_int(xdrs, &rdma_credit) || 459 ! xdr_u_int(xdrs, &op)) { 460 cmn_err(CE_WARN, "svc_rdma_krecv: xdr_u_int failed"); 461 goto xdr_err; 462 } 463 464 #ifdef DYNAMIC_CREDIT_CONTROL 465 svc_compute_credit(conn, rdma_credit, numclnts, availbufs, &to_be_posted); 466 for(i=0; i<to_be_posted; i++){ 467 status = rdma_svc_postrecv(conn); 468 if (status != RDMA_SUCCESS) { 469 cmn_err(CE_NOTE, 470 "svc_rdma_krecv: rdma_svc_postrecv failed %d", status); 471 goto badrpc_call; 472 } 473 } 474 svc_update_credit(conn, to_be_posted); 475 #endif 476 477 if (rdp->status != 0) { 478 cmn_err(CE_NOTE, 479 "svc_rdma_krecv: invalid status %d", 480 rdp->status); 481 goto badrpc_call; 482 } 483 484 if (! xdr_do_clist(xdrs, &cl)) { 485 cmn_err(CE_WARN, "svc_rdma_krecv: xdr_do_clist failed"); 486 goto xdr_err; 487 } 488 489 if (!xdr_decode_wlist_new(xdrs, &wcl, &wwl, &wcl_total_length,conn)) { 490 cmn_err(CE_NOTE, "svc recv: xdr_decode_wlist failed"); 491 if (cl) 492 clist_free(cl); 493 goto xdr_err; 494 } 495 vd->wlist = wcl; 496 497 (void) xdr_decode_reply_wchunk(xdrs, &repcl, conn); 498 vd->reply_cl = repcl; 499 500 /* 501 * A chunk at 0 offset indicates that the RPC call message 502 * is in a chunk. Get the RPC call message chunk. 503 */ 504 if (cl != NULL && op == RDMA_NOMSG) { 505 506 /* Remove RPC call message chunk from chunklist */ 507 cllong = cl; 508 cl = cl->c_next; 509 cllong->c_next = NULL; 510 511 /* Allocate and register memory for the RPC call msg chunk */ 512 #ifdef SERVER_REG_CACHE 513 long_reply_buf = RDMA_GET_SERVER_CACHE_BUF(conn,cllong->c_len); 514 cllong->long_reply_buf = (uint64)long_reply_buf; 515 cllong->c_daddr = (uint64)(uintptr_t) long_reply_buf->lrc_buf; 516 #else 517 cllong->c_daddr = (uint64)(uintptr_t) 518 kmem_alloc(cllong->c_len, KM_SLEEP); 519 #endif 520 if (cllong->c_daddr == NULL) { 521 cmn_err(CE_WARN, "svc krecv: no memory for rpc call"); 522 clist_free(cllong); 523 goto cll_malloc_err; 524 } 525 526 status = clist_register(conn, cllong, 0); 527 if (status) { 528 cmn_err(CE_WARN, "svc krecv: clist_register failed"); 529 #ifdef SERVER_REG_CACHE 530 RDMA_FREE_SERVER_CACHE_BUF(conn, (rib_lrc_entry_t *)cllong->long_reply_buf); 531 #else 532 if(cllong->c_len) 533 kmem_free((void *)(uintptr_t)cllong->c_daddr, 534 cllong->c_len); 535 #endif 536 if(cllong) 537 clist_free(cllong); 538 goto cll_malloc_err; 539 } 540 541 /* 542 * Now read the RPC call message in 543 */ 544 status = RDMA_READ(conn, cllong, WAIT); 545 if (status) { 546 cmn_err(CE_WARN, "svc_rdma_krecv: rdma_read failed"); 547 (void) clist_deregister(conn, cllong, 0); 548 #ifdef SERVER_REG_CACHE 549 RDMA_FREE_SERVER_CACHE_BUF(conn, (rib_lrc_entry_t *)cllong->long_reply_buf); 550 #else 551 kmem_free((void *)(uintptr_t)cllong->c_daddr, 552 cllong->c_len); 553 #endif 554 clist_free(cllong); 555 goto cll_malloc_err; 556 } 557 558 status = clist_syncmem(conn, cllong, 0); 559 (void) clist_deregister(conn, cllong, 0); 560 561 xdrrdma_create(xdrs, (caddr_t)(uintptr_t)cllong->c_daddr, 562 cllong->c_len, 0, cl, XDR_DECODE, conn); 563 564 vd->rpcbuf.type = CHUNK_BUFFER; 565 vd->rpcbuf.addr = (caddr_t)(uintptr_t)cllong->c_daddr; 566 vd->rpcbuf.len = cllong->c_len; 567 vd->rpcbuf.handle.mrc_rmr = 0; 568 #ifdef SERVER_REG_CACHE 569 vd->rpcbuf.long_reply_buf = (rib_lrc_entry_t *)cllong->long_reply_buf; 570 #endif 571 clist_free(cllong); 572 RDMA_BUF_FREE(conn, &rdp->rpcmsg); 573 } else { 574 pos = XDR_GETPOS(xdrs); 575 xdrrdma_create(xdrs, rdp->rpcmsg.addr + pos, 576 rdp->rpcmsg.len - pos, 0, cl, XDR_DECODE, conn); 577 vd->rpcbuf = rdp->rpcmsg; 578 } 579 580 if (! xdr_callmsg(xdrs, msg)) { 581 cmn_err(CE_WARN, "svc_rdma_krecv: xdr_callmsg failed"); 582 RSSTAT_INCR(rsxdrcall); 583 goto callmsg_err; 584 } 585 586 /* 587 * wlist sent for something besides NFS3 READ, so ignore it. 588 * FTDO: this isn't appropriate for READLINK3, but our client 589 * will never drive writelist for READLINK3, so good enough 590 * for the demo. 591 */ 592 if (vd->wlist != NULL && 593 (msg->rm_call.cb_rpcvers != RPC_MSG_VERSION || 594 msg->rm_call.cb_prog != NFS3_PROGRAM || 595 msg->rm_call.cb_vers != NFS_V3 || 596 msg->rm_call.cb_proc != NFSPROC3_READ)) { 597 #ifdef SERVER_REG_CACHE 598 RDMA_FREE_SERVER_CACHE_BUF(conn,(rib_lrc_entry_t *)wcl->long_reply_buf); 599 #else 600 kmem_free((void *)wcl->c_saddr, wcl_total_length); 601 #endif 602 clist_free(wcl); 603 vd->wlist = NULL; 604 } 605 606 /* 607 * Point the remote transport address in the service_transport 608 * handle at the address in the request. 609 */ 610 clone_xprt->xp_rtaddr.buf = conn->c_raddr.buf; 611 clone_xprt->xp_rtaddr.len = conn->c_raddr.len; 612 clone_xprt->xp_rtaddr.maxlen = conn->c_raddr.len; 613 clone_xprt->xp_xid = xid; 614 vd->conn = conn; 615 616 freeb(mp); 617 return (TRUE); 618 callmsg_err: 619 rdma_buf_free(conn, &vd->rpcbuf); 620 cll_malloc_err: 621 if (cl) 622 clist_free(cl); 623 if (wcl != NULL) { 624 #ifdef SERVER_REG_CACHE 625 RDMA_FREE_SERVER_CACHE_BUF(conn, (rib_lrc_entry_t *)wcl->long_reply_buf); 626 #else 627 kmem_free((void *)wcl->c_saddr, wcl_total_length); 628 #endif 629 clist_free(wcl); 630 } 631 xdr_err: 632 XDR_DESTROY(xdrs); 633 badrpc_call: 634 RDMA_BUF_FREE(conn, &rdp->rpcmsg); 635 RDMA_REL_CONN(conn); 636 freeb(mp); 637 RSSTAT_INCR(rsbadcalls); 638 return (FALSE); 639 } 640 641 #ifdef DYNAMIC_CREDIT_CONTROL 642 static void 643 svc_consume_credit(CONN *conn) 644 { 645 rdma_srv_cred_ctrl_t *cc_info; 646 647 mutex_enter(&conn->c_lock); 648 cc_info = &conn->rdma_conn_cred_ctrl_u.c_srv_cc; 649 cc_info->srv_cc_posted--; 650 mutex_exit(&conn->c_lock); 651 } 652 653 static void 654 svc_compute_credit(CONN *conn, uint32_t rdma_credit, int numclnts, 655 int availbufs, int *to_be_posted) 656 { 657 int average, grant; 658 rdma_srv_cred_ctrl_t *cc_info = &conn->rdma_conn_cred_ctrl_u.c_srv_cc; 659 660 if(numclnts == 0){ 661 cmn_err(CE_NOTE, "There is no active client!\n"); 662 *to_be_posted = 0; 663 return; 664 } 665 666 average = availbufs/numclnts; 667 668 mutex_enter(&conn->c_lock); 669 670 if(rdma_credit <= cc_info->srv_cc_posted) 671 grant = cc_info->srv_cc_posted; 672 else if(rdma_credit <= average) 673 grant = rdma_credit; 674 else 675 grant = average + (rdma_credit - average) * SVC_CREDIT_FACTOR; 676 677 *to_be_posted = grant - cc_info->srv_cc_posted; 678 if(*to_be_posted < 0) 679 *to_be_posted = 0; 680 if(*to_be_posted > availbufs) 681 *to_be_posted = availbufs/2; 682 683 mutex_exit(&conn->c_lock); 684 } 685 686 static void 687 svc_grant_credit(CONN * conn, uint32_t * rdma_credit) 688 { 689 rdma_srv_cred_ctrl_t *cc_info = &conn->rdma_conn_cred_ctrl_u.c_srv_cc; 690 691 mutex_enter(&conn->c_lock); 692 693 /* 694 * Fill in the granted number of buffers 695 * for credit control. 696 * 697 * XXX Currently ignoring what the client sends. 698 */ 699 *rdma_credit = cc_info->srv_cc_buffers_granted; 700 mutex_exit(&conn->c_lock); 701 } 702 703 static void 704 svc_update_credit(CONN * conn, int i) 705 { 706 rdma_srv_cred_ctrl_t *cc_info = &conn->rdma_conn_cred_ctrl_u.c_srv_cc; 707 708 mutex_enter(&conn->c_lock); 709 cc_info->srv_cc_buffers_granted = cc_info->srv_cc_posted + i; 710 cc_info->srv_cc_posted = cc_info->srv_cc_buffers_granted; 711 mutex_exit(&conn->c_lock); 712 } 713 #endif 714 715 static int 716 svc_process_wlist(struct clone_rdma_data *vd, xdrproc_t xdr_results, 717 caddr_t xdr_location, int *num_wsegment, 718 unsigned int *templen) 719 { 720 struct clist *wcl; 721 int data_len, avail_len, num, status; 722 READ3resok *rok; 723 724 rok = &(((READ3res *) xdr_location)->res_u.ok); 725 data_len = num = avail_len = 0; 726 727 wcl = vd->wlist; 728 while (wcl != NULL) { 729 if (wcl->c_dmemhandle.mrc_rmr != 0 730 && xdr_results == x_READ3res) { 731 732 avail_len += wcl->c_len; 733 if (wcl->c_len < rok->count) { 734 data_len += wcl->c_len; 735 } else { 736 /* Can make the rest chunks all 0-len */ 737 data_len += rok->count; 738 wcl->c_len = rok->count; 739 } 740 rok->count -= wcl->c_len; 741 num ++; 742 } 743 else { 744 cmn_err(CE_NOTE, 745 "svc_process_wlist: wlist has an error\n"); 746 } 747 wcl = wcl->c_next; 748 } 749 750 /* 751 * MUST fail if there are still more data 752 */ 753 if (rok->count > 0) { 754 cmn_err(CE_NOTE, 755 "svc_process_wlist: data_len is too short \n"); 756 return SVC_RDMA_FAIL; 757 } 758 759 wcl = vd->wlist; 760 rok->count = data_len; 761 rok->wlist_len = data_len; 762 rok->wlist = wcl; 763 *num_wsegment = num; 764 *templen = avail_len; 765 766 /* Register, sync and write over the data */ 767 if (data_len > 0) { 768 status = clist_register(vd->conn, wcl, TRUE); 769 if (status != RDMA_SUCCESS) { 770 cmn_err(CE_NOTE, 771 "svc_process_wlist: clist_register " 772 "failed"); 773 return SVC_RDMA_FAIL; 774 } 775 776 status = clist_syncmem(vd->conn, wcl, TRUE); 777 if (status != RDMA_SUCCESS) { 778 cmn_err(CE_NOTE, 779 "svc_process_wlist: syncmem failed(%d)", 780 status); 781 return SVC_RDMA_FAIL; 782 } 783 784 status = RDMA_WRITE(vd->conn, wcl, NOWAIT); 785 if (status != RDMA_SUCCESS) { 786 cmn_err(CE_NOTE, 787 "svc_process_wlist: RDMA_WRITE failed(%d)", 788 status); 789 return SVC_RDMA_FAIL; 790 } 791 } 792 793 return SVC_RDMA_SUCCESS; 794 } 795 796 static int 797 svc_process_long_reply(SVCXPRT * clone_xprt, CONN * conn, 798 xdrproc_t xdr_results, caddr_t xdr_location, 799 caddr_t vd, XDR ** xdrs, 800 struct rpc_msg *msg, bool_t has_args, int *msglen, 801 int *freelen, int *num, unsigned int *len) 802 { 803 rdma_buf_t long_rpc = {0}; 804 int status; 805 struct clist *ncl = NULL, *wcl = NULL; 806 char *memp = NULL; 807 int avail_len = 0; 808 int count = 0; 809 int data_len = 0; 810 *num = 0; 811 *freelen = 0; 812 /* 813 * If the clone_xprt struct has a reply chunk list, 814 * then we MUST RDMA_WRITE the reply back to the client, 815 * no matter what its size is. This translates to: 816 * 817 * RDMA_WRITE + RDMA_SEND(op = RDMA_NOMSG) 818 * 819 * XXX the rdma write code currently ignores kerberos. 820 */ 821 822 (*msglen) += xdrrdma_sizeof(xdr_results, xdr_location, rdma_minchunk); 823 824 wcl = (struct clist *)vd; 825 count = *msglen; 826 while (wcl != NULL) { 827 *freelen += wcl->c_len; 828 if (wcl->c_dmemhandle.mrc_rmr != 0) 829 { 830 avail_len += wcl->c_len; 831 if (wcl->c_len < count) { 832 data_len += wcl->c_len; 833 } else { 834 data_len += count; 835 wcl->c_len = count; 836 } 837 count -= wcl->c_len; 838 *num += 1; 839 } 840 else { 841 cmn_err(CE_NOTE, 842 "svc_process_long_reply: wchunk list has an error\n"); 843 } 844 wcl = wcl->c_next; 845 } 846 847 /* 848 * MUST fail if there are still more data 849 */ 850 if (count > 0) { 851 cmn_err(CE_NOTE, 852 "svc_process_long_reply: data_len is too short \n"); 853 return SVC_RDMA_FAIL; 854 } 855 /* 856 * Setup buffers for long rpc reply 857 */ 858 859 /* 860 * We specify 0 for the chunk size since we 861 * don't want a chunk list. 862 */ 863 wcl = (struct clist *)vd; 864 xdrrdma_create(*xdrs, (caddr_t)wcl->c_saddr , *msglen, 0, 865 wcl, XDR_ENCODE, NULL); 866 867 msg->rm_xid = clone_xprt->xp_xid; 868 869 if (!(xdr_replymsg(*xdrs, msg) && 870 (!has_args || SVCAUTH_WRAP(&clone_xprt->xp_auth, *xdrs, 871 xdr_results, xdr_location)))) { 872 kmem_free((void *)wcl->c_saddr, *freelen); 873 cmn_err(CE_WARN, "svc_process_long_reply: " 874 "xdr_replymsg/SVCAUTH_WRAP failed " 875 "for long reply\n"); 876 return SVC_RDMA_FAIL; 877 } 878 *len = XDR_GETPOS(*xdrs); 879 880 if (clist_register(conn, wcl, TRUE) != RDMA_SUCCESS) { 881 #ifdef SERVER_REG_CACHE 882 RDMA_FREE_SERVER_CACHE_BUF(conn, (rib_lrc_entry_t *)wcl->long_reply_buf); 883 #else 884 kmem_free((void *)(wcl->c_saddr), *freelen); 885 #endif 886 cmn_err(CE_NOTE, "svc_process_long_reply: RDMA_WRITE: " 887 "clist reg failed"); 888 return SVC_RDMA_FAIL; 889 } 890 891 status = clist_syncmem(conn, wcl, TRUE); 892 if (status) { 893 (void) clist_deregister(conn, wcl, TRUE); 894 #ifdef SERVER_REG_CACHE 895 RDMA_FREE_SERVER_CACHE_BUF(conn, (rib_lrc_entry_t *)wcl->long_reply_buf); 896 #else 897 kmem_free((void *)(wcl->c_saddr), *freelen); 898 #endif 899 cmn_err(CE_NOTE, 900 "svc_process_long_reply: sync mem failed %d", status); 901 return SVC_RDMA_FAIL; 902 } 903 904 /* 905 * Note: we must pass WAIT into the rdma write call to 906 * ensure that the call completes before we move on, where 907 * part of 'moving on' is deregistering the memory -- and 908 * if the memory is deregistered before the write completes 909 * we'll have an error. 910 */ 911 status = RDMA_WRITE(conn, wcl, NOWAIT); 912 if (status != RDMA_SUCCESS) { 913 (void) clist_deregister(conn, wcl, TRUE); 914 #ifdef SERVER_REG_CACHE 915 RDMA_FREE_SERVER_CACHE_BUF(conn, (rib_lrc_entry_t *)wcl->long_reply_buf); 916 #else 917 kmem_free((void *)(wcl->c_saddr), *freelen); 918 #endif 919 cmn_err(CE_NOTE, 920 "svc_process_long_reply: RDMA_WRITE failed %d", 921 status); 922 return SVC_RDMA_FAIL; 923 } 924 925 return SVC_RDMA_SUCCESS; 926 } 927 928 static int 929 svc_compose_rpcmsg(SVCXPRT * clone_xprt, CONN * conn, xdrproc_t xdr_results, 930 caddr_t xdr_location, rdma_buf_t * rpcreply, XDR ** xdrs, 931 struct rpc_msg *msg, bool_t has_args, int *msglen, 932 unsigned int *len) 933 { 934 int auth_flavor = msg->rm_reply.rp_acpt.ar_verf.oa_flavor; 935 936 if (has_args && auth_flavor != RPCSEC_GSS) 937 (*msglen) += xdrrdma_sizeof(xdr_results, xdr_location, 938 rdma_minchunk); 939 else if (has_args && auth_flavor == RPCSEC_GSS) { 940 (*msglen) += 941 2 * MAX_AUTH_BYTES + 2 * sizeof(struct opaque_auth); 942 (*msglen) += xdr_sizeof(xdr_results, xdr_location); 943 } 944 945 if (*msglen > RPC_MSG_SZ) { 946 cmn_err(CE_NOTE, 947 "svc_compose_rpcmsg: Server needs to send a reply" 948 "larger than RPC_MSG_SZ\n"); 949 return SVC_RDMA_FAIL; 950 } 951 952 /* 953 * Get a pre-allocated buffer for rpc reply 954 */ 955 rpcreply->type = SEND_BUFFER; 956 if (RDMA_BUF_ALLOC(conn, rpcreply)) { 957 cmn_err(CE_WARN, "svc_compose_rpcmsg: no free buffers!"); 958 return SVC_RDMA_FAIL; 959 } 960 961 if (has_args == FALSE || auth_flavor != RPCSEC_GSS) { 962 xdrrdma_create(*xdrs, rpcreply->addr, rpcreply->len, 963 rdma_minchunk, NULL, XDR_ENCODE, NULL); 964 } 965 else { 966 xdrrdma_create(*xdrs, rpcreply->addr, *msglen, 0, NULL, 967 XDR_ENCODE, NULL); 968 } 969 970 msg->rm_xid = clone_xprt->xp_xid; 971 972 if (has_args) { 973 if (!(xdr_replymsg(*xdrs, msg) && 974 (!has_args 975 || SVCAUTH_WRAP(&clone_xprt->xp_auth, *xdrs, 976 xdr_results, xdr_location)))) { 977 if (auth_flavor == RPCSEC_GSS 978 && rpcreply->addr != (*xdrs)->x_base) { 979 rpcreply->addr = (*xdrs)->x_base; 980 rpcreply->len = xdr_getbufsize(*xdrs); 981 } 982 rdma_buf_free(conn, rpcreply); 983 cmn_err(CE_WARN, 984 "svc_compose_rpcmsg: xdr_replymsg/SVCAUTH_WRAP " 985 "failed"); 986 return SVC_RDMA_FAIL; 987 } 988 if (auth_flavor == RPCSEC_GSS 989 && rpcreply->addr != (*xdrs)->x_base) { 990 rpcreply->addr = (*xdrs)->x_base; 991 rpcreply->len = xdr_getbufsize(*xdrs); 992 } 993 } 994 else { 995 if (!xdr_replymsg(*xdrs, msg)) { 996 rdma_buf_free(conn, rpcreply); 997 cmn_err(CE_WARN, 998 "svc_compose_rpcmsg: xdr_replymsg/SVCAUTH_WRAP " 999 "failed"); 1000 return SVC_RDMA_FAIL; 1001 } 1002 } 1003 1004 *len = XDR_GETPOS(*xdrs); 1005 1006 if (auth_flavor == RPCSEC_GSS) { 1007 XDR_DESTROY(*xdrs); 1008 xdrrdma_create(*xdrs, rpcreply->addr, *len, 0, NULL, 1009 XDR_ENCODE, NULL); 1010 } 1011 1012 return SVC_RDMA_SUCCESS; 1013 } 1014 1015 /* 1016 * Send rpc reply. 1017 */ 1018 static bool_t 1019 svc_rdma_ksend(SVCXPRT * clone_xprt, struct rpc_msg *msg) 1020 { 1021 XDR *xdrs = &(clone_xprt->xp_xdrout); 1022 XDR rxdrs; 1023 CONN *conn = NULL; 1024 rdma_buf_t clmsg = {0}, rpcreply = {0}; 1025 1026 struct clone_rdma_data *vd; 1027 struct clist *cl = NULL; 1028 struct clist *sendlist = NULL; 1029 struct clist *wcl = NULL; 1030 struct clist *reply_cl; 1031 xdrproc_t xdr_results; 1032 caddr_t xdr_location; 1033 1034 int retval = FALSE; 1035 int status, msglen, num_wsegment = 0, num_wreply_segments = 0; 1036 uint32_t rdma_credit = 0, templen = 0; 1037 int freelen =0; 1038 bool_t has_args; 1039 uint_t len, op, vers; 1040 1041 vd = (struct clone_rdma_data *) clone_xprt->xp_p2buf; 1042 conn = vd->conn; 1043 1044 /* 1045 * If there is a result procedure specified in the reply message, 1046 * it will be processed in the xdr_replymsg and SVCAUTH_WRAP. 1047 * We need to make sure it won't be processed twice, so we null 1048 * it for xdr_replymsg here. 1049 */ 1050 has_args = FALSE; 1051 if (msg->rm_reply.rp_stat == MSG_ACCEPTED && 1052 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) { 1053 if ((xdr_results = msg->acpted_rply.ar_results.proc) != NULL) { 1054 has_args = TRUE; 1055 xdr_location = msg->acpted_rply.ar_results.where; 1056 msg->acpted_rply.ar_results.proc = xdr_void; 1057 msg->acpted_rply.ar_results.where = NULL; 1058 } 1059 } 1060 1061 /* 1062 * Use RDMA Write to return content requested by wlist. 1063 * Only 1 writechunk in writelist for now, 1064 * but this chunk can contain multiple rdma segments. 1065 */ 1066 if (vd->wlist) { 1067 status = svc_process_wlist(vd, xdr_results, xdr_location, 1068 &num_wsegment, &templen); 1069 if (status != SVC_RDMA_SUCCESS) { 1070 goto out; 1071 } 1072 } 1073 #ifdef RPC_RDMA_INLINE 1074 else if (xdr_results == x_READ3res) { 1075 READ3resok *rok; 1076 rok = &(((READ3res *) xdr_location)->res_u.ok); 1077 rok->wlist = NULL; 1078 } 1079 #endif 1080 1081 /* 1082 * Get the size of the rpc reply message. 1083 */ 1084 msglen = xdr_sizeof(xdr_replymsg, msg); 1085 1086 /*reply_cl.c_daddr = NULL;*/ 1087 reply_cl = vd->reply_cl; 1088 1089 if (vd->reply_cl) { 1090 1091 status = svc_process_long_reply(clone_xprt, 1092 conn, xdr_results, 1093 xdr_location, (caddr_t)vd->reply_cl, 1094 &xdrs, msg, has_args, 1095 &msglen, &freelen, &num_wreply_segments, &len); 1096 if (status == SVC_RDMA_SUCCESS) { 1097 op = RDMA_NOMSG; 1098 cl = NULL; 1099 goto rdma_writed_long_reply_out; 1100 } 1101 else 1102 goto out; 1103 } 1104 status = svc_compose_rpcmsg(clone_xprt, conn, xdr_results, 1105 xdr_location, &rpcreply, &xdrs, msg, 1106 has_args, &msglen, &len); 1107 if (status != SVC_RDMA_SUCCESS) 1108 goto out; 1109 1110 op = RDMA_MSG; 1111 1112 cl = xdrrdma_clist(xdrs); 1113 cl = NULL; 1114 if (cl != NULL) { 1115 cmn_err(CE_NOTE, 1116 "svc_rdma_ksend: Should not provide non-null" 1117 "read chunk list to client\n"); 1118 } 1119 1120 rdma_writed_long_reply_out: 1121 1122 clmsg.type = SEND_BUFFER; 1123 if (RDMA_BUF_ALLOC(conn, &clmsg)) { 1124 rdma_buf_free(conn, &rpcreply); 1125 cmn_err(CE_WARN, "svc_rdma_ksend: no free buffers!!"); 1126 goto out; 1127 } 1128 1129 #ifdef DYNAMIC_CREDIT_CONTROL 1130 svc_grant_credit(conn, &rdma_credit); 1131 #else 1132 rdma_credit = rdma_bufs_granted; 1133 #endif 1134 1135 vers = RPCRDMA_VERS; 1136 xdrs = &rxdrs; 1137 xdrmem_create(xdrs, clmsg.addr, clmsg.len, XDR_ENCODE); 1138 (*(uint32_t *) clmsg.addr) = msg->rm_xid; 1139 /* Skip xid and set the xdr position accordingly. */ 1140 XDR_SETPOS(xdrs, sizeof(uint32_t)); 1141 if (!xdr_u_int(xdrs, &vers) || 1142 !xdr_u_int(xdrs, &rdma_credit) || !xdr_u_int(xdrs, &op)) { 1143 rdma_buf_free(conn, &rpcreply); 1144 rdma_buf_free(conn, &clmsg); 1145 cmn_err(CE_WARN, "svc_rdma_ksend: xdr_u_int failed"); 1146 goto out; 1147 } 1148 1149 /* 1150 * Now XDR the read chunk list, actually always NULL 1151 */ 1152 (void) xdr_do_clist(xdrs, &cl); 1153 1154 /* 1155 * encode write list -- we already drove RDMA_WRITEs 1156 */ 1157 wcl = vd->wlist; 1158 if (!xdr_encode_wlist(xdrs, wcl, num_wsegment)) { 1159 cmn_err(CE_NOTE, 1160 "svc_rdma_ksend: xdr_encode_wlist failed: " 1161 "wcl=%p", (void *) wcl); 1162 rdma_buf_free(conn, &rpcreply); 1163 rdma_buf_free(conn, &clmsg); 1164 goto out; 1165 } 1166 1167 /* 1168 * XDR encode the RDMA_REPLY write chunk 1169 */ 1170 (void) xdr_encode_reply_wchunk(xdrs, vd->reply_cl, num_wreply_segments); 1171 1172 clist_add(&sendlist, 0, XDR_GETPOS(xdrs), &clmsg.handle, clmsg.addr, 1173 NULL, NULL); 1174 1175 if (op == RDMA_MSG) { 1176 clist_add(&sendlist, 0, len, &rpcreply.handle, 1177 rpcreply.addr, NULL, NULL); 1178 } 1179 1180 #if defined(ASYNC_SERVER_DEREG) 1181 status = RDMA_SEND_NW(conn, sendlist, msg->rm_xid, (caddr_t)conn, 1182 (caddr_t)vd->wlist, 1183 templen, 1184 (caddr_t)reply_cl, 1185 freelen, num_wsegment, num_wreply_segments ); 1186 #else 1187 status = RDMA_SEND(conn, sendlist, msg->rm_xid); 1188 #endif 1189 if (status != RDMA_SUCCESS) { 1190 goto out; 1191 } 1192 1193 retval = TRUE; 1194 1195 out: 1196 1197 /* 1198 * Free up sendlist chunks 1199 */ 1200 if (sendlist != NULL) 1201 clist_free(sendlist); 1202 1203 /* 1204 * Destroy private data for xdr rdma 1205 */ 1206 if ((clone_xprt->xp_xdrout).x_private) 1207 XDR_DESTROY(&(clone_xprt->xp_xdrout)); 1208 if (rxdrs.x_private) 1209 XDR_DESTROY(&rxdrs); 1210 1211 /* 1212 * This is completely disgusting. If public is set it is 1213 * a pointer to a structure whose first field is the address 1214 * of the function to free that structure and any related 1215 * stuff. (see rrokfree in nfs_xdr.c). 1216 */ 1217 if (xdrs->x_public) { 1218 /* LINTED pointer alignment */ 1219 (**((int (**)()) xdrs->x_public)) (xdrs->x_public); 1220 } 1221 1222 if (vd->wlist != NULL) { 1223 #if defined(ASYNC_SERVER_DEREG) 1224 if(!retval) { 1225 #endif 1226 wcl = vd->wlist; 1227 (void) clist_deregister(vd->conn, wcl, TRUE); 1228 #ifdef SERVER_REG_CACHE 1229 RDMA_FREE_SERVER_CACHE_BUF(vd->conn, (rib_lrc_entry_t *)wcl->long_reply_buf); 1230 #else 1231 if(templen) 1232 kmem_free((void *) (vd->wlist)->c_saddr, templen); 1233 #endif 1234 kmem_free(vd->wlist, num_wsegment * sizeof(struct clist)); 1235 #if defined(ASYNC_SERVER_DEREG) 1236 } 1237 #endif 1238 vd->wlist = NULL; 1239 } 1240 1241 1242 if(vd->reply_cl != NULL){ 1243 #if defined(ASYNC_SERVER_DEREG) 1244 if(!retval) { 1245 #endif 1246 (void) clist_deregister(conn, reply_cl, TRUE); 1247 #ifdef SERVER_REG_CACHE 1248 RDMA_FREE_SERVER_CACHE_BUF(conn, (rib_lrc_entry_t *)reply_cl->long_reply_buf); 1249 #else 1250 #ifdef DEBUG 1251 if(rdma_svc_debug > 1) 1252 cmn_err(CE_NOTE, "Freeing up %p of length %d\n",reply_cl->c_saddr,freelen); 1253 #endif 1254 if(freelen) 1255 kmem_free((void *)(reply_cl->c_saddr), freelen); 1256 #endif 1257 kmem_free((void *)vd->reply_cl, num_wreply_segments * sizeof(struct clist)); 1258 #if defined(ASYNC_SERVER_DEREG) 1259 } 1260 #endif 1261 vd->reply_cl = NULL; 1262 } 1263 return (retval); 1264 } 1265 1266 /* 1267 * Deserialize arguments. 1268 */ 1269 static bool_t 1270 svc_rdma_kgetargs(SVCXPRT *clone_xprt, xdrproc_t xdr_args, caddr_t args_ptr) 1271 { 1272 if ((SVCAUTH_UNWRAP(&clone_xprt->xp_auth, &clone_xprt->xp_xdrin, 1273 xdr_args, args_ptr)) != TRUE) 1274 return (FALSE); 1275 return (TRUE); 1276 } 1277 1278 static bool_t 1279 svc_rdma_kfreeargs(SVCXPRT *clone_xprt, xdrproc_t xdr_args, 1280 caddr_t args_ptr) 1281 { 1282 struct clone_rdma_data *vd; 1283 bool_t retval; 1284 1285 vd = (struct clone_rdma_data *)clone_xprt->xp_p2buf; 1286 if (args_ptr) { 1287 XDR *xdrs = &clone_xprt->xp_xdrin; 1288 struct clist *cl; 1289 1290 cl = xdrrdma_clist(xdrs); 1291 if (cl != NULL) 1292 clist_free(cl); 1293 1294 xdrs->x_op = XDR_FREE; 1295 retval = (*xdr_args)(xdrs, args_ptr); 1296 } 1297 XDR_DESTROY(&(clone_xprt->xp_xdrin)); 1298 rdma_buf_free(vd->conn, &vd->rpcbuf); 1299 RDMA_REL_CONN(vd->conn); 1300 return (retval); 1301 } 1302 1303 /* ARGSUSED */ 1304 static int32_t * 1305 svc_rdma_kgetres(SVCXPRT *clone_xprt, int size) 1306 { 1307 return (NULL); 1308 } 1309 1310 /* ARGSUSED */ 1311 static void 1312 svc_rdma_kfreeres(SVCXPRT *clone_xprt) 1313 { 1314 } 1315 1316 /* 1317 * the dup cacheing routines below provide a cache of non-failure 1318 * transaction id's. rpc service routines can use this to detect 1319 * retransmissions and re-send a non-failure response. 1320 */ 1321 1322 /* 1323 * MAXDUPREQS is the number of cached items. It should be adjusted 1324 * to the service load so that there is likely to be a response entry 1325 * when the first retransmission comes in. 1326 */ 1327 #define MAXDUPREQS 1024 1328 1329 /* 1330 * This should be appropriately scaled to MAXDUPREQS. 1331 */ 1332 #define DRHASHSZ 257 1333 1334 #if ((DRHASHSZ & (DRHASHSZ - 1)) == 0) 1335 #define XIDHASH(xid) ((xid) & (DRHASHSZ - 1)) 1336 #else 1337 #define XIDHASH(xid) ((xid) % DRHASHSZ) 1338 #endif 1339 #define DRHASH(dr) XIDHASH((dr)->dr_xid) 1340 #define REQTOXID(req) ((req)->rq_xprt->xp_xid) 1341 1342 static int rdmandupreqs = 0; 1343 static int rdmamaxdupreqs = MAXDUPREQS; 1344 static kmutex_t rdmadupreq_lock; 1345 static struct dupreq *rdmadrhashtbl[DRHASHSZ]; 1346 static int rdmadrhashstat[DRHASHSZ]; 1347 1348 static void unhash(struct dupreq *); 1349 1350 /* 1351 * rdmadrmru points to the head of a circular linked list in lru order. 1352 * rdmadrmru->dr_next == drlru 1353 */ 1354 struct dupreq *rdmadrmru; 1355 1356 /* 1357 * svc_rdma_kdup searches the request cache and returns 0 if the 1358 * request is not found in the cache. If it is found, then it 1359 * returns the state of the request (in progress or done) and 1360 * the status or attributes that were part of the original reply. 1361 */ 1362 static int 1363 svc_rdma_kdup(struct svc_req *req, caddr_t res, int size, struct dupreq **drpp, 1364 bool_t *dupcachedp) 1365 { 1366 struct dupreq *dr; 1367 uint32_t xid; 1368 uint32_t drhash; 1369 int status; 1370 1371 xid = REQTOXID(req); 1372 mutex_enter(&rdmadupreq_lock); 1373 RSSTAT_INCR(rsdupchecks); 1374 /* 1375 * Check to see whether an entry already exists in the cache. 1376 */ 1377 dr = rdmadrhashtbl[XIDHASH(xid)]; 1378 while (dr != NULL) { 1379 if (dr->dr_xid == xid && 1380 dr->dr_proc == req->rq_proc && 1381 dr->dr_prog == req->rq_prog && 1382 dr->dr_vers == req->rq_vers && 1383 dr->dr_addr.len == req->rq_xprt->xp_rtaddr.len && 1384 bcmp((caddr_t)dr->dr_addr.buf, 1385 (caddr_t)req->rq_xprt->xp_rtaddr.buf, 1386 dr->dr_addr.len) == 0) { 1387 status = dr->dr_status; 1388 if (status == DUP_DONE) { 1389 bcopy(dr->dr_resp.buf, res, size); 1390 if (dupcachedp != NULL) 1391 *dupcachedp = (dr->dr_resfree != NULL); 1392 } else { 1393 dr->dr_status = DUP_INPROGRESS; 1394 *drpp = dr; 1395 } 1396 RSSTAT_INCR(rsdupreqs); 1397 mutex_exit(&rdmadupreq_lock); 1398 return (status); 1399 } 1400 dr = dr->dr_chain; 1401 } 1402 1403 /* 1404 * There wasn't an entry, either allocate a new one or recycle 1405 * an old one. 1406 */ 1407 if (rdmandupreqs < rdmamaxdupreqs) { 1408 dr = kmem_alloc(sizeof (*dr), KM_NOSLEEP); 1409 if (dr == NULL) { 1410 mutex_exit(&rdmadupreq_lock); 1411 return (DUP_ERROR); 1412 } 1413 dr->dr_resp.buf = NULL; 1414 dr->dr_resp.maxlen = 0; 1415 dr->dr_addr.buf = NULL; 1416 dr->dr_addr.maxlen = 0; 1417 if (rdmadrmru) { 1418 dr->dr_next = rdmadrmru->dr_next; 1419 rdmadrmru->dr_next = dr; 1420 } else { 1421 dr->dr_next = dr; 1422 } 1423 rdmandupreqs++; 1424 } else { 1425 dr = rdmadrmru->dr_next; 1426 while (dr->dr_status == DUP_INPROGRESS) { 1427 dr = dr->dr_next; 1428 if (dr == rdmadrmru->dr_next) { 1429 cmn_err(CE_WARN, "svc_rdma_kdup no slots free"); 1430 mutex_exit(&rdmadupreq_lock); 1431 return (DUP_ERROR); 1432 } 1433 } 1434 unhash(dr); 1435 if (dr->dr_resfree) { 1436 (*dr->dr_resfree)(dr->dr_resp.buf); 1437 } 1438 } 1439 dr->dr_resfree = NULL; 1440 rdmadrmru = dr; 1441 1442 dr->dr_xid = REQTOXID(req); 1443 dr->dr_prog = req->rq_prog; 1444 dr->dr_vers = req->rq_vers; 1445 dr->dr_proc = req->rq_proc; 1446 if (dr->dr_addr.maxlen < req->rq_xprt->xp_rtaddr.len) { 1447 if (dr->dr_addr.buf != NULL) 1448 kmem_free(dr->dr_addr.buf, dr->dr_addr.maxlen); 1449 dr->dr_addr.maxlen = req->rq_xprt->xp_rtaddr.len; 1450 dr->dr_addr.buf = kmem_alloc(dr->dr_addr.maxlen, KM_NOSLEEP); 1451 if (dr->dr_addr.buf == NULL) { 1452 dr->dr_addr.maxlen = 0; 1453 dr->dr_status = DUP_DROP; 1454 mutex_exit(&rdmadupreq_lock); 1455 return (DUP_ERROR); 1456 } 1457 } 1458 dr->dr_addr.len = req->rq_xprt->xp_rtaddr.len; 1459 bcopy(req->rq_xprt->xp_rtaddr.buf, dr->dr_addr.buf, dr->dr_addr.len); 1460 if (dr->dr_resp.maxlen < size) { 1461 if (dr->dr_resp.buf != NULL) 1462 kmem_free(dr->dr_resp.buf, dr->dr_resp.maxlen); 1463 dr->dr_resp.maxlen = (unsigned int)size; 1464 dr->dr_resp.buf = kmem_alloc(size, KM_NOSLEEP); 1465 if (dr->dr_resp.buf == NULL) { 1466 dr->dr_resp.maxlen = 0; 1467 dr->dr_status = DUP_DROP; 1468 mutex_exit(&rdmadupreq_lock); 1469 return (DUP_ERROR); 1470 } 1471 } 1472 dr->dr_status = DUP_INPROGRESS; 1473 1474 drhash = (uint32_t)DRHASH(dr); 1475 dr->dr_chain = rdmadrhashtbl[drhash]; 1476 rdmadrhashtbl[drhash] = dr; 1477 rdmadrhashstat[drhash]++; 1478 mutex_exit(&rdmadupreq_lock); 1479 *drpp = dr; 1480 return (DUP_NEW); 1481 } 1482 1483 /* 1484 * svc_rdma_kdupdone marks the request done (DUP_DONE or DUP_DROP) 1485 * and stores the response. 1486 */ 1487 static void 1488 svc_rdma_kdupdone(struct dupreq *dr, caddr_t res, void (*dis_resfree)(), 1489 int size, int status) 1490 { 1491 ASSERT(dr->dr_resfree == NULL); 1492 if (status == DUP_DONE) { 1493 bcopy(res, dr->dr_resp.buf, size); 1494 dr->dr_resfree = dis_resfree; 1495 } 1496 dr->dr_status = status; 1497 } 1498 1499 /* 1500 * This routine expects that the mutex, rdmadupreq_lock, is already held. 1501 */ 1502 static void 1503 unhash(struct dupreq *dr) 1504 { 1505 struct dupreq *drt; 1506 struct dupreq *drtprev = NULL; 1507 uint32_t drhash; 1508 1509 ASSERT(MUTEX_HELD(&rdmadupreq_lock)); 1510 1511 drhash = (uint32_t)DRHASH(dr); 1512 drt = rdmadrhashtbl[drhash]; 1513 while (drt != NULL) { 1514 if (drt == dr) { 1515 rdmadrhashstat[drhash]--; 1516 if (drtprev == NULL) { 1517 rdmadrhashtbl[drhash] = drt->dr_chain; 1518 } else { 1519 drtprev->dr_chain = drt->dr_chain; 1520 } 1521 return; 1522 } 1523 drtprev = drt; 1524 drt = drt->dr_chain; 1525 } 1526 } 1527 1528 bool_t 1529 rdma_get_wchunk_seg(struct svc_req *req, iovec_t *iov) 1530 { 1531 struct clone_rdma_data *rcd; 1532 struct clist *clist; 1533 uint32_t tlen; 1534 1535 if (req->rq_xprt->xp_type != T_RDMA) { 1536 return (FALSE); 1537 } 1538 1539 rcd = (struct clone_rdma_data *)(&req->rq_xprt->xp_p2buf); 1540 if (rcd->wlist == NULL) { 1541 return (FALSE); 1542 } 1543 tlen = 0; 1544 clist = rcd->wlist; 1545 while(clist){ 1546 tlen += clist->c_len; 1547 clist = clist->c_next; 1548 } 1549 1550 /* 1551 * set iov to addr+len of first segment of first wchunk of 1552 * wlist sent by client. krecv() already malloc'd a buffer 1553 * large enough, but registration is deferred until we write 1554 * the buffer back to (NFS) client using RDMA_WRITE. 1555 */ 1556 iov->iov_base = (caddr_t)rcd->wlist->c_saddr; 1557 iov->iov_len = tlen; 1558 1559 return (TRUE); 1560 } 1561--- EOF ---