1 /* 2 * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. 3 * Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the BSD-type 9 * license below: 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 15 * Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 18 * Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials provided 21 * with the distribution. 22 * 23 * Neither the name of the Network Appliance, Inc. nor the names of 24 * its contributors may be used to endorse or promote products 25 * derived from this software without specific prior written 26 * permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Author: Tom Tucker <tom@opengridcomputing.com> 41 */ 42 43 #include <linux/sunrpc/debug.h> 44 #include <linux/sunrpc/rpc_rdma.h> 45 #include <linux/spinlock.h> 46 #include <asm/unaligned.h> 47 #include <rdma/ib_verbs.h> 48 #include <rdma/rdma_cm.h> 49 #include <linux/sunrpc/svc_rdma.h> 50 51 #define RPCDBG_FACILITY RPCDBG_SVCXPRT 52 53 static int map_xdr(struct svcxprt_rdma *xprt, 54 struct xdr_buf *xdr, 55 struct svc_rdma_req_map *vec) 56 { 57 int sge_no; 58 u32 sge_bytes; 59 u32 page_bytes; 60 u32 page_off; 61 int page_no; 62 63 if (xdr->len != 64 (xdr->head[0].iov_len + xdr->page_len + xdr->tail[0].iov_len)) { 65 pr_err("svcrdma: map_xdr: XDR buffer length error\n"); 66 return -EIO; 67 } 68 69 /* Skip the first sge, this is for the RPCRDMA header */ 70 sge_no = 1; 71 72 /* Head SGE */ 73 vec->sge[sge_no].iov_base = xdr->head[0].iov_base; 74 vec->sge[sge_no].iov_len = xdr->head[0].iov_len; 75 sge_no++; 76 77 /* pages SGE */ 78 page_no = 0; 79 page_bytes = xdr->page_len; 80 page_off = xdr->page_base; 81 while (page_bytes) { 82 vec->sge[sge_no].iov_base = 83 page_address(xdr->pages[page_no]) + page_off; 84 sge_bytes = min_t(u32, page_bytes, (PAGE_SIZE - page_off)); 85 page_bytes -= sge_bytes; 86 vec->sge[sge_no].iov_len = sge_bytes; 87 88 sge_no++; 89 page_no++; 90 page_off = 0; /* reset for next time through loop */ 91 } 92 93 /* Tail SGE */ 94 if (xdr->tail[0].iov_len) { 95 vec->sge[sge_no].iov_base = xdr->tail[0].iov_base; 96 vec->sge[sge_no].iov_len = xdr->tail[0].iov_len; 97 sge_no++; 98 } 99 100 dprintk("svcrdma: map_xdr: sge_no %d page_no %d " 101 "page_base %u page_len %u head_len %zu tail_len %zu\n", 102 sge_no, page_no, xdr->page_base, xdr->page_len, 103 xdr->head[0].iov_len, xdr->tail[0].iov_len); 104 105 vec->count = sge_no; 106 return 0; 107 } 108 109 static dma_addr_t dma_map_xdr(struct svcxprt_rdma *xprt, 110 struct xdr_buf *xdr, 111 u32 xdr_off, size_t len, int dir) 112 { 113 struct page *page; 114 dma_addr_t dma_addr; 115 if (xdr_off < xdr->head[0].iov_len) { 116 /* This offset is in the head */ 117 xdr_off += (unsigned long)xdr->head[0].iov_base & ~PAGE_MASK; 118 page = virt_to_page(xdr->head[0].iov_base); 119 } else { 120 xdr_off -= xdr->head[0].iov_len; 121 if (xdr_off < xdr->page_len) { 122 /* This offset is in the page list */ 123 xdr_off += xdr->page_base; 124 page = xdr->pages[xdr_off >> PAGE_SHIFT]; 125 xdr_off &= ~PAGE_MASK; 126 } else { 127 /* This offset is in the tail */ 128 xdr_off -= xdr->page_len; 129 xdr_off += (unsigned long) 130 xdr->tail[0].iov_base & ~PAGE_MASK; 131 page = virt_to_page(xdr->tail[0].iov_base); 132 } 133 } 134 dma_addr = ib_dma_map_page(xprt->sc_cm_id->device, page, xdr_off, 135 min_t(size_t, PAGE_SIZE, len), dir); 136 return dma_addr; 137 } 138 139 /* Returns the address of the first read chunk or <nul> if no read chunk 140 * is present 141 */ 142 struct rpcrdma_read_chunk * 143 svc_rdma_get_read_chunk(struct rpcrdma_msg *rmsgp) 144 { 145 struct rpcrdma_read_chunk *ch = 146 (struct rpcrdma_read_chunk *)&rmsgp->rm_body.rm_chunks[0]; 147 148 if (ch->rc_discrim == xdr_zero) 149 return NULL; 150 return ch; 151 } 152 153 /* Returns the address of the first read write array element or <nul> 154 * if no write array list is present 155 */ 156 static struct rpcrdma_write_array * 157 svc_rdma_get_write_array(struct rpcrdma_msg *rmsgp) 158 { 159 if (rmsgp->rm_body.rm_chunks[0] != xdr_zero || 160 rmsgp->rm_body.rm_chunks[1] == xdr_zero) 161 return NULL; 162 return (struct rpcrdma_write_array *)&rmsgp->rm_body.rm_chunks[1]; 163 } 164 165 /* Returns the address of the first reply array element or <nul> if no 166 * reply array is present 167 */ 168 static struct rpcrdma_write_array * 169 svc_rdma_get_reply_array(struct rpcrdma_msg *rmsgp) 170 { 171 struct rpcrdma_read_chunk *rch; 172 struct rpcrdma_write_array *wr_ary; 173 struct rpcrdma_write_array *rp_ary; 174 175 /* XXX: Need to fix when reply chunk may occur with read list 176 * and/or write list. 177 */ 178 if (rmsgp->rm_body.rm_chunks[0] != xdr_zero || 179 rmsgp->rm_body.rm_chunks[1] != xdr_zero) 180 return NULL; 181 182 rch = svc_rdma_get_read_chunk(rmsgp); 183 if (rch) { 184 while (rch->rc_discrim != xdr_zero) 185 rch++; 186 187 /* The reply chunk follows an empty write array located 188 * at 'rc_position' here. The reply array is at rc_target. 189 */ 190 rp_ary = (struct rpcrdma_write_array *)&rch->rc_target; 191 goto found_it; 192 } 193 194 wr_ary = svc_rdma_get_write_array(rmsgp); 195 if (wr_ary) { 196 int chunk = be32_to_cpu(wr_ary->wc_nchunks); 197 198 rp_ary = (struct rpcrdma_write_array *) 199 &wr_ary->wc_array[chunk].wc_target.rs_length; 200 goto found_it; 201 } 202 203 /* No read list, no write list */ 204 rp_ary = (struct rpcrdma_write_array *)&rmsgp->rm_body.rm_chunks[2]; 205 206 found_it: 207 if (rp_ary->wc_discrim == xdr_zero) 208 return NULL; 209 return rp_ary; 210 } 211 212 /* Assumptions: 213 * - The specified write_len can be represented in sc_max_sge * PAGE_SIZE 214 */ 215 static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp, 216 u32 rmr, u64 to, 217 u32 xdr_off, int write_len, 218 struct svc_rdma_req_map *vec) 219 { 220 struct ib_send_wr write_wr; 221 struct ib_sge *sge; 222 int xdr_sge_no; 223 int sge_no; 224 int sge_bytes; 225 int sge_off; 226 int bc; 227 struct svc_rdma_op_ctxt *ctxt; 228 229 if (vec->count > RPCSVC_MAXPAGES) { 230 pr_err("svcrdma: Too many pages (%lu)\n", vec->count); 231 return -EIO; 232 } 233 234 dprintk("svcrdma: RDMA_WRITE rmr=%x, to=%llx, xdr_off=%d, " 235 "write_len=%d, vec->sge=%p, vec->count=%lu\n", 236 rmr, (unsigned long long)to, xdr_off, 237 write_len, vec->sge, vec->count); 238 239 ctxt = svc_rdma_get_context(xprt); 240 ctxt->direction = DMA_TO_DEVICE; 241 sge = ctxt->sge; 242 243 /* Find the SGE associated with xdr_off */ 244 for (bc = xdr_off, xdr_sge_no = 1; bc && xdr_sge_no < vec->count; 245 xdr_sge_no++) { 246 if (vec->sge[xdr_sge_no].iov_len > bc) 247 break; 248 bc -= vec->sge[xdr_sge_no].iov_len; 249 } 250 251 sge_off = bc; 252 bc = write_len; 253 sge_no = 0; 254 255 /* Copy the remaining SGE */ 256 while (bc != 0) { 257 sge_bytes = min_t(size_t, 258 bc, vec->sge[xdr_sge_no].iov_len-sge_off); 259 sge[sge_no].length = sge_bytes; 260 sge[sge_no].addr = 261 dma_map_xdr(xprt, &rqstp->rq_res, xdr_off, 262 sge_bytes, DMA_TO_DEVICE); 263 xdr_off += sge_bytes; 264 if (ib_dma_mapping_error(xprt->sc_cm_id->device, 265 sge[sge_no].addr)) 266 goto err; 267 atomic_inc(&xprt->sc_dma_used); 268 sge[sge_no].lkey = xprt->sc_dma_lkey; 269 ctxt->count++; 270 sge_off = 0; 271 sge_no++; 272 xdr_sge_no++; 273 if (xdr_sge_no > vec->count) { 274 pr_err("svcrdma: Too many sges (%d)\n", xdr_sge_no); 275 goto err; 276 } 277 bc -= sge_bytes; 278 if (sge_no == xprt->sc_max_sge) 279 break; 280 } 281 282 /* Prepare WRITE WR */ 283 memset(&write_wr, 0, sizeof write_wr); 284 ctxt->wr_op = IB_WR_RDMA_WRITE; 285 write_wr.wr_id = (unsigned long)ctxt; 286 write_wr.sg_list = &sge[0]; 287 write_wr.num_sge = sge_no; 288 write_wr.opcode = IB_WR_RDMA_WRITE; 289 write_wr.send_flags = IB_SEND_SIGNALED; 290 write_wr.wr.rdma.rkey = rmr; 291 write_wr.wr.rdma.remote_addr = to; 292 293 /* Post It */ 294 atomic_inc(&rdma_stat_write); 295 if (svc_rdma_send(xprt, &write_wr)) 296 goto err; 297 return write_len - bc; 298 err: 299 svc_rdma_unmap_dma(ctxt); 300 svc_rdma_put_context(ctxt, 0); 301 /* Fatal error, close transport */ 302 return -EIO; 303 } 304 305 static int send_write_chunks(struct svcxprt_rdma *xprt, 306 struct rpcrdma_msg *rdma_argp, 307 struct rpcrdma_msg *rdma_resp, 308 struct svc_rqst *rqstp, 309 struct svc_rdma_req_map *vec) 310 { 311 u32 xfer_len = rqstp->rq_res.page_len + rqstp->rq_res.tail[0].iov_len; 312 int write_len; 313 u32 xdr_off; 314 int chunk_off; 315 int chunk_no; 316 int nchunks; 317 struct rpcrdma_write_array *arg_ary; 318 struct rpcrdma_write_array *res_ary; 319 int ret; 320 321 arg_ary = svc_rdma_get_write_array(rdma_argp); 322 if (!arg_ary) 323 return 0; 324 res_ary = (struct rpcrdma_write_array *) 325 &rdma_resp->rm_body.rm_chunks[1]; 326 327 /* Write chunks start at the pagelist */ 328 nchunks = be32_to_cpu(arg_ary->wc_nchunks); 329 for (xdr_off = rqstp->rq_res.head[0].iov_len, chunk_no = 0; 330 xfer_len && chunk_no < nchunks; 331 chunk_no++) { 332 struct rpcrdma_segment *arg_ch; 333 u64 rs_offset; 334 335 arg_ch = &arg_ary->wc_array[chunk_no].wc_target; 336 write_len = min(xfer_len, be32_to_cpu(arg_ch->rs_length)); 337 338 /* Prepare the response chunk given the length actually 339 * written */ 340 xdr_decode_hyper((__be32 *)&arg_ch->rs_offset, &rs_offset); 341 svc_rdma_xdr_encode_array_chunk(res_ary, chunk_no, 342 arg_ch->rs_handle, 343 arg_ch->rs_offset, 344 write_len); 345 chunk_off = 0; 346 while (write_len) { 347 ret = send_write(xprt, rqstp, 348 be32_to_cpu(arg_ch->rs_handle), 349 rs_offset + chunk_off, 350 xdr_off, 351 write_len, 352 vec); 353 if (ret <= 0) { 354 dprintk("svcrdma: RDMA_WRITE failed, ret=%d\n", 355 ret); 356 return -EIO; 357 } 358 chunk_off += ret; 359 xdr_off += ret; 360 xfer_len -= ret; 361 write_len -= ret; 362 } 363 } 364 /* Update the req with the number of chunks actually used */ 365 svc_rdma_xdr_encode_write_list(rdma_resp, chunk_no); 366 367 return rqstp->rq_res.page_len + rqstp->rq_res.tail[0].iov_len; 368 } 369 370 static int send_reply_chunks(struct svcxprt_rdma *xprt, 371 struct rpcrdma_msg *rdma_argp, 372 struct rpcrdma_msg *rdma_resp, 373 struct svc_rqst *rqstp, 374 struct svc_rdma_req_map *vec) 375 { 376 u32 xfer_len = rqstp->rq_res.len; 377 int write_len; 378 u32 xdr_off; 379 int chunk_no; 380 int chunk_off; 381 int nchunks; 382 struct rpcrdma_segment *ch; 383 struct rpcrdma_write_array *arg_ary; 384 struct rpcrdma_write_array *res_ary; 385 int ret; 386 387 arg_ary = svc_rdma_get_reply_array(rdma_argp); 388 if (!arg_ary) 389 return 0; 390 /* XXX: need to fix when reply lists occur with read-list and or 391 * write-list */ 392 res_ary = (struct rpcrdma_write_array *) 393 &rdma_resp->rm_body.rm_chunks[2]; 394 395 /* xdr offset starts at RPC message */ 396 nchunks = be32_to_cpu(arg_ary->wc_nchunks); 397 for (xdr_off = 0, chunk_no = 0; 398 xfer_len && chunk_no < nchunks; 399 chunk_no++) { 400 u64 rs_offset; 401 ch = &arg_ary->wc_array[chunk_no].wc_target; 402 write_len = min(xfer_len, be32_to_cpu(ch->rs_length)); 403 404 /* Prepare the reply chunk given the length actually 405 * written */ 406 xdr_decode_hyper((__be32 *)&ch->rs_offset, &rs_offset); 407 svc_rdma_xdr_encode_array_chunk(res_ary, chunk_no, 408 ch->rs_handle, ch->rs_offset, 409 write_len); 410 chunk_off = 0; 411 while (write_len) { 412 ret = send_write(xprt, rqstp, 413 be32_to_cpu(ch->rs_handle), 414 rs_offset + chunk_off, 415 xdr_off, 416 write_len, 417 vec); 418 if (ret <= 0) { 419 dprintk("svcrdma: RDMA_WRITE failed, ret=%d\n", 420 ret); 421 return -EIO; 422 } 423 chunk_off += ret; 424 xdr_off += ret; 425 xfer_len -= ret; 426 write_len -= ret; 427 } 428 } 429 /* Update the req with the number of chunks actually used */ 430 svc_rdma_xdr_encode_reply_array(res_ary, chunk_no); 431 432 return rqstp->rq_res.len; 433 } 434 435 /* This function prepares the portion of the RPCRDMA message to be 436 * sent in the RDMA_SEND. This function is called after data sent via 437 * RDMA has already been transmitted. There are three cases: 438 * - The RPCRDMA header, RPC header, and payload are all sent in a 439 * single RDMA_SEND. This is the "inline" case. 440 * - The RPCRDMA header and some portion of the RPC header and data 441 * are sent via this RDMA_SEND and another portion of the data is 442 * sent via RDMA. 443 * - The RPCRDMA header [NOMSG] is sent in this RDMA_SEND and the RPC 444 * header and data are all transmitted via RDMA. 445 * In all three cases, this function prepares the RPCRDMA header in 446 * sge[0], the 'type' parameter indicates the type to place in the 447 * RPCRDMA header, and the 'byte_count' field indicates how much of 448 * the XDR to include in this RDMA_SEND. NB: The offset of the payload 449 * to send is zero in the XDR. 450 */ 451 static int send_reply(struct svcxprt_rdma *rdma, 452 struct svc_rqst *rqstp, 453 struct page *page, 454 struct rpcrdma_msg *rdma_resp, 455 struct svc_rdma_op_ctxt *ctxt, 456 struct svc_rdma_req_map *vec, 457 int byte_count) 458 { 459 struct ib_send_wr send_wr; 460 u32 xdr_off; 461 int sge_no; 462 int sge_bytes; 463 int page_no; 464 int pages; 465 int ret; 466 467 /* Post a recv buffer to handle another request. */ 468 ret = svc_rdma_post_recv(rdma); 469 if (ret) { 470 printk(KERN_INFO 471 "svcrdma: could not post a receive buffer, err=%d." 472 "Closing transport %p.\n", ret, rdma); 473 set_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags); 474 svc_rdma_put_context(ctxt, 0); 475 return -ENOTCONN; 476 } 477 478 /* Prepare the context */ 479 ctxt->pages[0] = page; 480 ctxt->count = 1; 481 482 /* Prepare the SGE for the RPCRDMA Header */ 483 ctxt->sge[0].lkey = rdma->sc_dma_lkey; 484 ctxt->sge[0].length = svc_rdma_xdr_get_reply_hdr_len(rdma_resp); 485 ctxt->sge[0].addr = 486 ib_dma_map_page(rdma->sc_cm_id->device, page, 0, 487 ctxt->sge[0].length, DMA_TO_DEVICE); 488 if (ib_dma_mapping_error(rdma->sc_cm_id->device, ctxt->sge[0].addr)) 489 goto err; 490 atomic_inc(&rdma->sc_dma_used); 491 492 ctxt->direction = DMA_TO_DEVICE; 493 494 /* Map the payload indicated by 'byte_count' */ 495 xdr_off = 0; 496 for (sge_no = 1; byte_count && sge_no < vec->count; sge_no++) { 497 sge_bytes = min_t(size_t, vec->sge[sge_no].iov_len, byte_count); 498 byte_count -= sge_bytes; 499 ctxt->sge[sge_no].addr = 500 dma_map_xdr(rdma, &rqstp->rq_res, xdr_off, 501 sge_bytes, DMA_TO_DEVICE); 502 xdr_off += sge_bytes; 503 if (ib_dma_mapping_error(rdma->sc_cm_id->device, 504 ctxt->sge[sge_no].addr)) 505 goto err; 506 atomic_inc(&rdma->sc_dma_used); 507 ctxt->sge[sge_no].lkey = rdma->sc_dma_lkey; 508 ctxt->sge[sge_no].length = sge_bytes; 509 } 510 if (byte_count != 0) { 511 pr_err("svcrdma: Could not map %d bytes\n", byte_count); 512 goto err; 513 } 514 515 /* Save all respages in the ctxt and remove them from the 516 * respages array. They are our pages until the I/O 517 * completes. 518 */ 519 pages = rqstp->rq_next_page - rqstp->rq_respages; 520 for (page_no = 0; page_no < pages; page_no++) { 521 ctxt->pages[page_no+1] = rqstp->rq_respages[page_no]; 522 ctxt->count++; 523 rqstp->rq_respages[page_no] = NULL; 524 /* 525 * If there are more pages than SGE, terminate SGE 526 * list so that svc_rdma_unmap_dma doesn't attempt to 527 * unmap garbage. 528 */ 529 if (page_no+1 >= sge_no) 530 ctxt->sge[page_no+1].length = 0; 531 } 532 rqstp->rq_next_page = rqstp->rq_respages + 1; 533 534 /* The loop above bumps sc_dma_used for each sge. The 535 * xdr_buf.tail gets a separate sge, but resides in the 536 * same page as xdr_buf.head. Don't count it twice. 537 */ 538 if (sge_no > ctxt->count) 539 atomic_dec(&rdma->sc_dma_used); 540 541 if (sge_no > rdma->sc_max_sge) { 542 pr_err("svcrdma: Too many sges (%d)\n", sge_no); 543 goto err; 544 } 545 memset(&send_wr, 0, sizeof send_wr); 546 ctxt->wr_op = IB_WR_SEND; 547 send_wr.wr_id = (unsigned long)ctxt; 548 send_wr.sg_list = ctxt->sge; 549 send_wr.num_sge = sge_no; 550 send_wr.opcode = IB_WR_SEND; 551 send_wr.send_flags = IB_SEND_SIGNALED; 552 553 ret = svc_rdma_send(rdma, &send_wr); 554 if (ret) 555 goto err; 556 557 return 0; 558 559 err: 560 svc_rdma_unmap_dma(ctxt); 561 svc_rdma_put_context(ctxt, 1); 562 return -EIO; 563 } 564 565 void svc_rdma_prep_reply_hdr(struct svc_rqst *rqstp) 566 { 567 } 568 569 int svc_rdma_sendto(struct svc_rqst *rqstp) 570 { 571 struct svc_xprt *xprt = rqstp->rq_xprt; 572 struct svcxprt_rdma *rdma = 573 container_of(xprt, struct svcxprt_rdma, sc_xprt); 574 struct rpcrdma_msg *rdma_argp; 575 struct rpcrdma_msg *rdma_resp; 576 struct rpcrdma_write_array *reply_ary; 577 enum rpcrdma_proc reply_type; 578 int ret; 579 int inline_bytes; 580 struct page *res_page; 581 struct svc_rdma_op_ctxt *ctxt; 582 struct svc_rdma_req_map *vec; 583 584 dprintk("svcrdma: sending response for rqstp=%p\n", rqstp); 585 586 /* Get the RDMA request header. The receive logic always 587 * places this at the start of page 0. 588 */ 589 rdma_argp = page_address(rqstp->rq_pages[0]); 590 591 /* Build an req vec for the XDR */ 592 ctxt = svc_rdma_get_context(rdma); 593 ctxt->direction = DMA_TO_DEVICE; 594 vec = svc_rdma_get_req_map(); 595 ret = map_xdr(rdma, &rqstp->rq_res, vec); 596 if (ret) 597 goto err0; 598 inline_bytes = rqstp->rq_res.len; 599 600 /* Create the RDMA response header */ 601 res_page = alloc_page(GFP_KERNEL | __GFP_NOFAIL); 602 rdma_resp = page_address(res_page); 603 reply_ary = svc_rdma_get_reply_array(rdma_argp); 604 if (reply_ary) 605 reply_type = RDMA_NOMSG; 606 else 607 reply_type = RDMA_MSG; 608 svc_rdma_xdr_encode_reply_header(rdma, rdma_argp, 609 rdma_resp, reply_type); 610 611 /* Send any write-chunk data and build resp write-list */ 612 ret = send_write_chunks(rdma, rdma_argp, rdma_resp, 613 rqstp, vec); 614 if (ret < 0) { 615 printk(KERN_ERR "svcrdma: failed to send write chunks, rc=%d\n", 616 ret); 617 goto err1; 618 } 619 inline_bytes -= ret; 620 621 /* Send any reply-list data and update resp reply-list */ 622 ret = send_reply_chunks(rdma, rdma_argp, rdma_resp, 623 rqstp, vec); 624 if (ret < 0) { 625 printk(KERN_ERR "svcrdma: failed to send reply chunks, rc=%d\n", 626 ret); 627 goto err1; 628 } 629 inline_bytes -= ret; 630 631 ret = send_reply(rdma, rqstp, res_page, rdma_resp, ctxt, vec, 632 inline_bytes); 633 svc_rdma_put_req_map(vec); 634 dprintk("svcrdma: send_reply returns %d\n", ret); 635 return ret; 636 637 err1: 638 put_page(res_page); 639 err0: 640 svc_rdma_put_req_map(vec); 641 svc_rdma_put_context(ctxt, 0); 642 return ret; 643 } 644