1 /* 2 * Copyright (c) 2004 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved. 4 * Copyright (c) 2006 Intel Corporation. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #include <linux/module.h> 36 #include <linux/init.h> 37 #include <linux/err.h> 38 #include <linux/random.h> 39 #include <linux/spinlock.h> 40 #include <linux/slab.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kref.h> 43 #include <linux/idr.h> 44 #include <linux/workqueue.h> 45 #include <uapi/linux/if_ether.h> 46 #include <rdma/ib_pack.h> 47 #include <rdma/ib_cache.h> 48 #include <rdma/rdma_netlink.h> 49 #include <net/netlink.h> 50 #include <uapi/rdma/ib_user_sa.h> 51 #include <rdma/ib_marshall.h> 52 #include <rdma/ib_addr.h> 53 #include "sa.h" 54 #include "core_priv.h" 55 56 #define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100 57 #define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000 58 #define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000 59 static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT; 60 61 struct ib_sa_sm_ah { 62 struct ib_ah *ah; 63 struct kref ref; 64 u16 pkey_index; 65 u8 src_path_mask; 66 }; 67 68 struct ib_sa_classport_cache { 69 bool valid; 70 struct ib_class_port_info data; 71 }; 72 73 struct ib_sa_port { 74 struct ib_mad_agent *agent; 75 struct ib_sa_sm_ah *sm_ah; 76 struct work_struct update_task; 77 struct ib_sa_classport_cache classport_info; 78 spinlock_t classport_lock; /* protects class port info set */ 79 spinlock_t ah_lock; 80 u8 port_num; 81 }; 82 83 struct ib_sa_device { 84 int start_port, end_port; 85 struct ib_event_handler event_handler; 86 struct ib_sa_port port[0]; 87 }; 88 89 struct ib_sa_query { 90 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *); 91 void (*release)(struct ib_sa_query *); 92 struct ib_sa_client *client; 93 struct ib_sa_port *port; 94 struct ib_mad_send_buf *mad_buf; 95 struct ib_sa_sm_ah *sm_ah; 96 int id; 97 u32 flags; 98 struct list_head list; /* Local svc request list */ 99 u32 seq; /* Local svc request sequence number */ 100 unsigned long timeout; /* Local svc timeout */ 101 u8 path_use; /* How will the pathrecord be used */ 102 }; 103 104 #define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001 105 #define IB_SA_CANCEL 0x00000002 106 107 struct ib_sa_service_query { 108 void (*callback)(int, struct ib_sa_service_rec *, void *); 109 void *context; 110 struct ib_sa_query sa_query; 111 }; 112 113 struct ib_sa_path_query { 114 void (*callback)(int, struct ib_sa_path_rec *, void *); 115 void *context; 116 struct ib_sa_query sa_query; 117 }; 118 119 struct ib_sa_guidinfo_query { 120 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *); 121 void *context; 122 struct ib_sa_query sa_query; 123 }; 124 125 struct ib_sa_classport_info_query { 126 void (*callback)(int, struct ib_class_port_info *, void *); 127 void *context; 128 struct ib_sa_query sa_query; 129 }; 130 131 struct ib_sa_mcmember_query { 132 void (*callback)(int, struct ib_sa_mcmember_rec *, void *); 133 void *context; 134 struct ib_sa_query sa_query; 135 }; 136 137 static LIST_HEAD(ib_nl_request_list); 138 static DEFINE_SPINLOCK(ib_nl_request_lock); 139 static atomic_t ib_nl_sa_request_seq; 140 static struct workqueue_struct *ib_nl_wq; 141 static struct delayed_work ib_nl_timed_work; 142 static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = { 143 [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY, 144 .len = sizeof(struct ib_path_rec_data)}, 145 [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32}, 146 [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64}, 147 [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY, 148 .len = sizeof(struct rdma_nla_ls_gid)}, 149 [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY, 150 .len = sizeof(struct rdma_nla_ls_gid)}, 151 [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8}, 152 [LS_NLA_TYPE_PKEY] = {.type = NLA_U16}, 153 [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16}, 154 }; 155 156 157 static void ib_sa_add_one(struct ib_device *device); 158 static void ib_sa_remove_one(struct ib_device *device, void *client_data); 159 160 static struct ib_client sa_client = { 161 .name = "sa", 162 .add = ib_sa_add_one, 163 .remove = ib_sa_remove_one 164 }; 165 166 static DEFINE_SPINLOCK(idr_lock); 167 static DEFINE_IDR(query_idr); 168 169 static DEFINE_SPINLOCK(tid_lock); 170 static u32 tid; 171 172 #define PATH_REC_FIELD(field) \ 173 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \ 174 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \ 175 .field_name = "sa_path_rec:" #field 176 177 static const struct ib_field path_rec_table[] = { 178 { PATH_REC_FIELD(service_id), 179 .offset_words = 0, 180 .offset_bits = 0, 181 .size_bits = 64 }, 182 { PATH_REC_FIELD(dgid), 183 .offset_words = 2, 184 .offset_bits = 0, 185 .size_bits = 128 }, 186 { PATH_REC_FIELD(sgid), 187 .offset_words = 6, 188 .offset_bits = 0, 189 .size_bits = 128 }, 190 { PATH_REC_FIELD(dlid), 191 .offset_words = 10, 192 .offset_bits = 0, 193 .size_bits = 16 }, 194 { PATH_REC_FIELD(slid), 195 .offset_words = 10, 196 .offset_bits = 16, 197 .size_bits = 16 }, 198 { PATH_REC_FIELD(raw_traffic), 199 .offset_words = 11, 200 .offset_bits = 0, 201 .size_bits = 1 }, 202 { RESERVED, 203 .offset_words = 11, 204 .offset_bits = 1, 205 .size_bits = 3 }, 206 { PATH_REC_FIELD(flow_label), 207 .offset_words = 11, 208 .offset_bits = 4, 209 .size_bits = 20 }, 210 { PATH_REC_FIELD(hop_limit), 211 .offset_words = 11, 212 .offset_bits = 24, 213 .size_bits = 8 }, 214 { PATH_REC_FIELD(traffic_class), 215 .offset_words = 12, 216 .offset_bits = 0, 217 .size_bits = 8 }, 218 { PATH_REC_FIELD(reversible), 219 .offset_words = 12, 220 .offset_bits = 8, 221 .size_bits = 1 }, 222 { PATH_REC_FIELD(numb_path), 223 .offset_words = 12, 224 .offset_bits = 9, 225 .size_bits = 7 }, 226 { PATH_REC_FIELD(pkey), 227 .offset_words = 12, 228 .offset_bits = 16, 229 .size_bits = 16 }, 230 { PATH_REC_FIELD(qos_class), 231 .offset_words = 13, 232 .offset_bits = 0, 233 .size_bits = 12 }, 234 { PATH_REC_FIELD(sl), 235 .offset_words = 13, 236 .offset_bits = 12, 237 .size_bits = 4 }, 238 { PATH_REC_FIELD(mtu_selector), 239 .offset_words = 13, 240 .offset_bits = 16, 241 .size_bits = 2 }, 242 { PATH_REC_FIELD(mtu), 243 .offset_words = 13, 244 .offset_bits = 18, 245 .size_bits = 6 }, 246 { PATH_REC_FIELD(rate_selector), 247 .offset_words = 13, 248 .offset_bits = 24, 249 .size_bits = 2 }, 250 { PATH_REC_FIELD(rate), 251 .offset_words = 13, 252 .offset_bits = 26, 253 .size_bits = 6 }, 254 { PATH_REC_FIELD(packet_life_time_selector), 255 .offset_words = 14, 256 .offset_bits = 0, 257 .size_bits = 2 }, 258 { PATH_REC_FIELD(packet_life_time), 259 .offset_words = 14, 260 .offset_bits = 2, 261 .size_bits = 6 }, 262 { PATH_REC_FIELD(preference), 263 .offset_words = 14, 264 .offset_bits = 8, 265 .size_bits = 8 }, 266 { RESERVED, 267 .offset_words = 14, 268 .offset_bits = 16, 269 .size_bits = 48 }, 270 }; 271 272 #define MCMEMBER_REC_FIELD(field) \ 273 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \ 274 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \ 275 .field_name = "sa_mcmember_rec:" #field 276 277 static const struct ib_field mcmember_rec_table[] = { 278 { MCMEMBER_REC_FIELD(mgid), 279 .offset_words = 0, 280 .offset_bits = 0, 281 .size_bits = 128 }, 282 { MCMEMBER_REC_FIELD(port_gid), 283 .offset_words = 4, 284 .offset_bits = 0, 285 .size_bits = 128 }, 286 { MCMEMBER_REC_FIELD(qkey), 287 .offset_words = 8, 288 .offset_bits = 0, 289 .size_bits = 32 }, 290 { MCMEMBER_REC_FIELD(mlid), 291 .offset_words = 9, 292 .offset_bits = 0, 293 .size_bits = 16 }, 294 { MCMEMBER_REC_FIELD(mtu_selector), 295 .offset_words = 9, 296 .offset_bits = 16, 297 .size_bits = 2 }, 298 { MCMEMBER_REC_FIELD(mtu), 299 .offset_words = 9, 300 .offset_bits = 18, 301 .size_bits = 6 }, 302 { MCMEMBER_REC_FIELD(traffic_class), 303 .offset_words = 9, 304 .offset_bits = 24, 305 .size_bits = 8 }, 306 { MCMEMBER_REC_FIELD(pkey), 307 .offset_words = 10, 308 .offset_bits = 0, 309 .size_bits = 16 }, 310 { MCMEMBER_REC_FIELD(rate_selector), 311 .offset_words = 10, 312 .offset_bits = 16, 313 .size_bits = 2 }, 314 { MCMEMBER_REC_FIELD(rate), 315 .offset_words = 10, 316 .offset_bits = 18, 317 .size_bits = 6 }, 318 { MCMEMBER_REC_FIELD(packet_life_time_selector), 319 .offset_words = 10, 320 .offset_bits = 24, 321 .size_bits = 2 }, 322 { MCMEMBER_REC_FIELD(packet_life_time), 323 .offset_words = 10, 324 .offset_bits = 26, 325 .size_bits = 6 }, 326 { MCMEMBER_REC_FIELD(sl), 327 .offset_words = 11, 328 .offset_bits = 0, 329 .size_bits = 4 }, 330 { MCMEMBER_REC_FIELD(flow_label), 331 .offset_words = 11, 332 .offset_bits = 4, 333 .size_bits = 20 }, 334 { MCMEMBER_REC_FIELD(hop_limit), 335 .offset_words = 11, 336 .offset_bits = 24, 337 .size_bits = 8 }, 338 { MCMEMBER_REC_FIELD(scope), 339 .offset_words = 12, 340 .offset_bits = 0, 341 .size_bits = 4 }, 342 { MCMEMBER_REC_FIELD(join_state), 343 .offset_words = 12, 344 .offset_bits = 4, 345 .size_bits = 4 }, 346 { MCMEMBER_REC_FIELD(proxy_join), 347 .offset_words = 12, 348 .offset_bits = 8, 349 .size_bits = 1 }, 350 { RESERVED, 351 .offset_words = 12, 352 .offset_bits = 9, 353 .size_bits = 23 }, 354 }; 355 356 #define SERVICE_REC_FIELD(field) \ 357 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \ 358 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \ 359 .field_name = "sa_service_rec:" #field 360 361 static const struct ib_field service_rec_table[] = { 362 { SERVICE_REC_FIELD(id), 363 .offset_words = 0, 364 .offset_bits = 0, 365 .size_bits = 64 }, 366 { SERVICE_REC_FIELD(gid), 367 .offset_words = 2, 368 .offset_bits = 0, 369 .size_bits = 128 }, 370 { SERVICE_REC_FIELD(pkey), 371 .offset_words = 6, 372 .offset_bits = 0, 373 .size_bits = 16 }, 374 { SERVICE_REC_FIELD(lease), 375 .offset_words = 7, 376 .offset_bits = 0, 377 .size_bits = 32 }, 378 { SERVICE_REC_FIELD(key), 379 .offset_words = 8, 380 .offset_bits = 0, 381 .size_bits = 128 }, 382 { SERVICE_REC_FIELD(name), 383 .offset_words = 12, 384 .offset_bits = 0, 385 .size_bits = 64*8 }, 386 { SERVICE_REC_FIELD(data8), 387 .offset_words = 28, 388 .offset_bits = 0, 389 .size_bits = 16*8 }, 390 { SERVICE_REC_FIELD(data16), 391 .offset_words = 32, 392 .offset_bits = 0, 393 .size_bits = 8*16 }, 394 { SERVICE_REC_FIELD(data32), 395 .offset_words = 36, 396 .offset_bits = 0, 397 .size_bits = 4*32 }, 398 { SERVICE_REC_FIELD(data64), 399 .offset_words = 40, 400 .offset_bits = 0, 401 .size_bits = 2*64 }, 402 }; 403 404 #define CLASSPORTINFO_REC_FIELD(field) \ 405 .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \ 406 .struct_size_bytes = sizeof((struct ib_class_port_info *)0)->field, \ 407 .field_name = "ib_class_port_info:" #field 408 409 static const struct ib_field classport_info_rec_table[] = { 410 { CLASSPORTINFO_REC_FIELD(base_version), 411 .offset_words = 0, 412 .offset_bits = 0, 413 .size_bits = 8 }, 414 { CLASSPORTINFO_REC_FIELD(class_version), 415 .offset_words = 0, 416 .offset_bits = 8, 417 .size_bits = 8 }, 418 { CLASSPORTINFO_REC_FIELD(capability_mask), 419 .offset_words = 0, 420 .offset_bits = 16, 421 .size_bits = 16 }, 422 { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time), 423 .offset_words = 1, 424 .offset_bits = 0, 425 .size_bits = 32 }, 426 { CLASSPORTINFO_REC_FIELD(redirect_gid), 427 .offset_words = 2, 428 .offset_bits = 0, 429 .size_bits = 128 }, 430 { CLASSPORTINFO_REC_FIELD(redirect_tcslfl), 431 .offset_words = 6, 432 .offset_bits = 0, 433 .size_bits = 32 }, 434 { CLASSPORTINFO_REC_FIELD(redirect_lid), 435 .offset_words = 7, 436 .offset_bits = 0, 437 .size_bits = 16 }, 438 { CLASSPORTINFO_REC_FIELD(redirect_pkey), 439 .offset_words = 7, 440 .offset_bits = 16, 441 .size_bits = 16 }, 442 443 { CLASSPORTINFO_REC_FIELD(redirect_qp), 444 .offset_words = 8, 445 .offset_bits = 0, 446 .size_bits = 32 }, 447 { CLASSPORTINFO_REC_FIELD(redirect_qkey), 448 .offset_words = 9, 449 .offset_bits = 0, 450 .size_bits = 32 }, 451 452 { CLASSPORTINFO_REC_FIELD(trap_gid), 453 .offset_words = 10, 454 .offset_bits = 0, 455 .size_bits = 128 }, 456 { CLASSPORTINFO_REC_FIELD(trap_tcslfl), 457 .offset_words = 14, 458 .offset_bits = 0, 459 .size_bits = 32 }, 460 461 { CLASSPORTINFO_REC_FIELD(trap_lid), 462 .offset_words = 15, 463 .offset_bits = 0, 464 .size_bits = 16 }, 465 { CLASSPORTINFO_REC_FIELD(trap_pkey), 466 .offset_words = 15, 467 .offset_bits = 16, 468 .size_bits = 16 }, 469 470 { CLASSPORTINFO_REC_FIELD(trap_hlqp), 471 .offset_words = 16, 472 .offset_bits = 0, 473 .size_bits = 32 }, 474 { CLASSPORTINFO_REC_FIELD(trap_qkey), 475 .offset_words = 17, 476 .offset_bits = 0, 477 .size_bits = 32 }, 478 }; 479 480 #define GUIDINFO_REC_FIELD(field) \ 481 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \ 482 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \ 483 .field_name = "sa_guidinfo_rec:" #field 484 485 static const struct ib_field guidinfo_rec_table[] = { 486 { GUIDINFO_REC_FIELD(lid), 487 .offset_words = 0, 488 .offset_bits = 0, 489 .size_bits = 16 }, 490 { GUIDINFO_REC_FIELD(block_num), 491 .offset_words = 0, 492 .offset_bits = 16, 493 .size_bits = 8 }, 494 { GUIDINFO_REC_FIELD(res1), 495 .offset_words = 0, 496 .offset_bits = 24, 497 .size_bits = 8 }, 498 { GUIDINFO_REC_FIELD(res2), 499 .offset_words = 1, 500 .offset_bits = 0, 501 .size_bits = 32 }, 502 { GUIDINFO_REC_FIELD(guid_info_list), 503 .offset_words = 2, 504 .offset_bits = 0, 505 .size_bits = 512 }, 506 }; 507 508 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query) 509 { 510 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE; 511 } 512 513 static inline int ib_sa_query_cancelled(struct ib_sa_query *query) 514 { 515 return (query->flags & IB_SA_CANCEL); 516 } 517 518 static void ib_nl_set_path_rec_attrs(struct sk_buff *skb, 519 struct ib_sa_query *query) 520 { 521 struct ib_sa_path_rec *sa_rec = query->mad_buf->context[1]; 522 struct ib_sa_mad *mad = query->mad_buf->mad; 523 ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask; 524 u16 val16; 525 u64 val64; 526 struct rdma_ls_resolve_header *header; 527 528 query->mad_buf->context[1] = NULL; 529 530 /* Construct the family header first */ 531 header = (struct rdma_ls_resolve_header *) 532 skb_put(skb, NLMSG_ALIGN(sizeof(*header))); 533 memcpy(header->device_name, query->port->agent->device->name, 534 LS_DEVICE_NAME_MAX); 535 header->port_num = query->port->port_num; 536 537 if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) && 538 sa_rec->reversible != 0) 539 query->path_use = LS_RESOLVE_PATH_USE_GMP; 540 else 541 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL; 542 header->path_use = query->path_use; 543 544 /* Now build the attributes */ 545 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) { 546 val64 = be64_to_cpu(sa_rec->service_id); 547 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID, 548 sizeof(val64), &val64); 549 } 550 if (comp_mask & IB_SA_PATH_REC_DGID) 551 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID, 552 sizeof(sa_rec->dgid), &sa_rec->dgid); 553 if (comp_mask & IB_SA_PATH_REC_SGID) 554 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID, 555 sizeof(sa_rec->sgid), &sa_rec->sgid); 556 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS) 557 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS, 558 sizeof(sa_rec->traffic_class), &sa_rec->traffic_class); 559 560 if (comp_mask & IB_SA_PATH_REC_PKEY) { 561 val16 = be16_to_cpu(sa_rec->pkey); 562 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY, 563 sizeof(val16), &val16); 564 } 565 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) { 566 val16 = be16_to_cpu(sa_rec->qos_class); 567 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS, 568 sizeof(val16), &val16); 569 } 570 } 571 572 static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask) 573 { 574 int len = 0; 575 576 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) 577 len += nla_total_size(sizeof(u64)); 578 if (comp_mask & IB_SA_PATH_REC_DGID) 579 len += nla_total_size(sizeof(struct rdma_nla_ls_gid)); 580 if (comp_mask & IB_SA_PATH_REC_SGID) 581 len += nla_total_size(sizeof(struct rdma_nla_ls_gid)); 582 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS) 583 len += nla_total_size(sizeof(u8)); 584 if (comp_mask & IB_SA_PATH_REC_PKEY) 585 len += nla_total_size(sizeof(u16)); 586 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) 587 len += nla_total_size(sizeof(u16)); 588 589 /* 590 * Make sure that at least some of the required comp_mask bits are 591 * set. 592 */ 593 if (WARN_ON(len == 0)) 594 return len; 595 596 /* Add the family header */ 597 len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header)); 598 599 return len; 600 } 601 602 static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask) 603 { 604 struct sk_buff *skb = NULL; 605 struct nlmsghdr *nlh; 606 void *data; 607 int ret = 0; 608 struct ib_sa_mad *mad; 609 int len; 610 611 mad = query->mad_buf->mad; 612 len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask); 613 if (len <= 0) 614 return -EMSGSIZE; 615 616 skb = nlmsg_new(len, gfp_mask); 617 if (!skb) 618 return -ENOMEM; 619 620 /* Put nlmsg header only for now */ 621 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS, 622 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST); 623 if (!data) { 624 nlmsg_free(skb); 625 return -EMSGSIZE; 626 } 627 628 /* Add attributes */ 629 ib_nl_set_path_rec_attrs(skb, query); 630 631 /* Repair the nlmsg header length */ 632 nlmsg_end(skb, nlh); 633 634 ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_LS, gfp_mask); 635 if (!ret) 636 ret = len; 637 else 638 ret = 0; 639 640 return ret; 641 } 642 643 static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask) 644 { 645 unsigned long flags; 646 unsigned long delay; 647 int ret; 648 649 INIT_LIST_HEAD(&query->list); 650 query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq); 651 652 /* Put the request on the list first.*/ 653 spin_lock_irqsave(&ib_nl_request_lock, flags); 654 delay = msecs_to_jiffies(sa_local_svc_timeout_ms); 655 query->timeout = delay + jiffies; 656 list_add_tail(&query->list, &ib_nl_request_list); 657 /* Start the timeout if this is the only request */ 658 if (ib_nl_request_list.next == &query->list) 659 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay); 660 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 661 662 ret = ib_nl_send_msg(query, gfp_mask); 663 if (ret <= 0) { 664 ret = -EIO; 665 /* Remove the request */ 666 spin_lock_irqsave(&ib_nl_request_lock, flags); 667 list_del(&query->list); 668 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 669 } else { 670 ret = 0; 671 } 672 673 return ret; 674 } 675 676 static int ib_nl_cancel_request(struct ib_sa_query *query) 677 { 678 unsigned long flags; 679 struct ib_sa_query *wait_query; 680 int found = 0; 681 682 spin_lock_irqsave(&ib_nl_request_lock, flags); 683 list_for_each_entry(wait_query, &ib_nl_request_list, list) { 684 /* Let the timeout to take care of the callback */ 685 if (query == wait_query) { 686 query->flags |= IB_SA_CANCEL; 687 query->timeout = jiffies; 688 list_move(&query->list, &ib_nl_request_list); 689 found = 1; 690 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1); 691 break; 692 } 693 } 694 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 695 696 return found; 697 } 698 699 static void send_handler(struct ib_mad_agent *agent, 700 struct ib_mad_send_wc *mad_send_wc); 701 702 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query, 703 const struct nlmsghdr *nlh) 704 { 705 struct ib_mad_send_wc mad_send_wc; 706 struct ib_sa_mad *mad = NULL; 707 const struct nlattr *head, *curr; 708 struct ib_path_rec_data *rec; 709 int len, rem; 710 u32 mask = 0; 711 int status = -EIO; 712 713 if (query->callback) { 714 head = (const struct nlattr *) nlmsg_data(nlh); 715 len = nlmsg_len(nlh); 716 switch (query->path_use) { 717 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL: 718 mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND; 719 break; 720 721 case LS_RESOLVE_PATH_USE_ALL: 722 case LS_RESOLVE_PATH_USE_GMP: 723 default: 724 mask = IB_PATH_PRIMARY | IB_PATH_GMP | 725 IB_PATH_BIDIRECTIONAL; 726 break; 727 } 728 nla_for_each_attr(curr, head, len, rem) { 729 if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) { 730 rec = nla_data(curr); 731 /* 732 * Get the first one. In the future, we may 733 * need to get up to 6 pathrecords. 734 */ 735 if ((rec->flags & mask) == mask) { 736 mad = query->mad_buf->mad; 737 mad->mad_hdr.method |= 738 IB_MGMT_METHOD_RESP; 739 memcpy(mad->data, rec->path_rec, 740 sizeof(rec->path_rec)); 741 status = 0; 742 break; 743 } 744 } 745 } 746 query->callback(query, status, mad); 747 } 748 749 mad_send_wc.send_buf = query->mad_buf; 750 mad_send_wc.status = IB_WC_SUCCESS; 751 send_handler(query->mad_buf->mad_agent, &mad_send_wc); 752 } 753 754 static void ib_nl_request_timeout(struct work_struct *work) 755 { 756 unsigned long flags; 757 struct ib_sa_query *query; 758 unsigned long delay; 759 struct ib_mad_send_wc mad_send_wc; 760 int ret; 761 762 spin_lock_irqsave(&ib_nl_request_lock, flags); 763 while (!list_empty(&ib_nl_request_list)) { 764 query = list_entry(ib_nl_request_list.next, 765 struct ib_sa_query, list); 766 767 if (time_after(query->timeout, jiffies)) { 768 delay = query->timeout - jiffies; 769 if ((long)delay <= 0) 770 delay = 1; 771 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay); 772 break; 773 } 774 775 list_del(&query->list); 776 ib_sa_disable_local_svc(query); 777 /* Hold the lock to protect against query cancellation */ 778 if (ib_sa_query_cancelled(query)) 779 ret = -1; 780 else 781 ret = ib_post_send_mad(query->mad_buf, NULL); 782 if (ret) { 783 mad_send_wc.send_buf = query->mad_buf; 784 mad_send_wc.status = IB_WC_WR_FLUSH_ERR; 785 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 786 send_handler(query->port->agent, &mad_send_wc); 787 spin_lock_irqsave(&ib_nl_request_lock, flags); 788 } 789 } 790 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 791 } 792 793 int ib_nl_handle_set_timeout(struct sk_buff *skb, 794 struct netlink_callback *cb) 795 { 796 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh; 797 int timeout, delta, abs_delta; 798 const struct nlattr *attr; 799 unsigned long flags; 800 struct ib_sa_query *query; 801 long delay = 0; 802 struct nlattr *tb[LS_NLA_TYPE_MAX]; 803 int ret; 804 805 if (!(nlh->nlmsg_flags & NLM_F_REQUEST) || 806 !(NETLINK_CB(skb).sk) || 807 !netlink_capable(skb, CAP_NET_ADMIN)) 808 return -EPERM; 809 810 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh), 811 nlmsg_len(nlh), ib_nl_policy); 812 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT]; 813 if (ret || !attr) 814 goto settimeout_out; 815 816 timeout = *(int *) nla_data(attr); 817 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN) 818 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN; 819 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX) 820 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX; 821 822 delta = timeout - sa_local_svc_timeout_ms; 823 if (delta < 0) 824 abs_delta = -delta; 825 else 826 abs_delta = delta; 827 828 if (delta != 0) { 829 spin_lock_irqsave(&ib_nl_request_lock, flags); 830 sa_local_svc_timeout_ms = timeout; 831 list_for_each_entry(query, &ib_nl_request_list, list) { 832 if (delta < 0 && abs_delta > query->timeout) 833 query->timeout = 0; 834 else 835 query->timeout += delta; 836 837 /* Get the new delay from the first entry */ 838 if (!delay) { 839 delay = query->timeout - jiffies; 840 if (delay <= 0) 841 delay = 1; 842 } 843 } 844 if (delay) 845 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 846 (unsigned long)delay); 847 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 848 } 849 850 settimeout_out: 851 return skb->len; 852 } 853 854 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh) 855 { 856 struct nlattr *tb[LS_NLA_TYPE_MAX]; 857 int ret; 858 859 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR) 860 return 0; 861 862 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh), 863 nlmsg_len(nlh), ib_nl_policy); 864 if (ret) 865 return 0; 866 867 return 1; 868 } 869 870 int ib_nl_handle_resolve_resp(struct sk_buff *skb, 871 struct netlink_callback *cb) 872 { 873 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh; 874 unsigned long flags; 875 struct ib_sa_query *query; 876 struct ib_mad_send_buf *send_buf; 877 struct ib_mad_send_wc mad_send_wc; 878 int found = 0; 879 int ret; 880 881 if ((nlh->nlmsg_flags & NLM_F_REQUEST) || 882 !(NETLINK_CB(skb).sk) || 883 !netlink_capable(skb, CAP_NET_ADMIN)) 884 return -EPERM; 885 886 spin_lock_irqsave(&ib_nl_request_lock, flags); 887 list_for_each_entry(query, &ib_nl_request_list, list) { 888 /* 889 * If the query is cancelled, let the timeout routine 890 * take care of it. 891 */ 892 if (nlh->nlmsg_seq == query->seq) { 893 found = !ib_sa_query_cancelled(query); 894 if (found) 895 list_del(&query->list); 896 break; 897 } 898 } 899 900 if (!found) { 901 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 902 goto resp_out; 903 } 904 905 send_buf = query->mad_buf; 906 907 if (!ib_nl_is_good_resolve_resp(nlh)) { 908 /* if the result is a failure, send out the packet via IB */ 909 ib_sa_disable_local_svc(query); 910 ret = ib_post_send_mad(query->mad_buf, NULL); 911 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 912 if (ret) { 913 mad_send_wc.send_buf = send_buf; 914 mad_send_wc.status = IB_WC_GENERAL_ERR; 915 send_handler(query->port->agent, &mad_send_wc); 916 } 917 } else { 918 spin_unlock_irqrestore(&ib_nl_request_lock, flags); 919 ib_nl_process_good_resolve_rsp(query, nlh); 920 } 921 922 resp_out: 923 return skb->len; 924 } 925 926 static void free_sm_ah(struct kref *kref) 927 { 928 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref); 929 930 ib_destroy_ah(sm_ah->ah); 931 kfree(sm_ah); 932 } 933 934 static void update_sm_ah(struct work_struct *work) 935 { 936 struct ib_sa_port *port = 937 container_of(work, struct ib_sa_port, update_task); 938 struct ib_sa_sm_ah *new_ah; 939 struct ib_port_attr port_attr; 940 struct ib_ah_attr ah_attr; 941 942 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) { 943 pr_warn("Couldn't query port\n"); 944 return; 945 } 946 947 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL); 948 if (!new_ah) { 949 return; 950 } 951 952 kref_init(&new_ah->ref); 953 new_ah->src_path_mask = (1 << port_attr.lmc) - 1; 954 955 new_ah->pkey_index = 0; 956 if (ib_find_pkey(port->agent->device, port->port_num, 957 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index)) 958 pr_err("Couldn't find index for default PKey\n"); 959 960 memset(&ah_attr, 0, sizeof ah_attr); 961 ah_attr.dlid = port_attr.sm_lid; 962 ah_attr.sl = port_attr.sm_sl; 963 ah_attr.port_num = port->port_num; 964 if (port_attr.grh_required) { 965 ah_attr.ah_flags = IB_AH_GRH; 966 ah_attr.grh.dgid.global.subnet_prefix = cpu_to_be64(port_attr.subnet_prefix); 967 ah_attr.grh.dgid.global.interface_id = cpu_to_be64(IB_SA_WELL_KNOWN_GUID); 968 } 969 970 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr); 971 if (IS_ERR(new_ah->ah)) { 972 pr_warn("Couldn't create new SM AH\n"); 973 kfree(new_ah); 974 return; 975 } 976 977 spin_lock_irq(&port->ah_lock); 978 if (port->sm_ah) 979 kref_put(&port->sm_ah->ref, free_sm_ah); 980 port->sm_ah = new_ah; 981 spin_unlock_irq(&port->ah_lock); 982 983 } 984 985 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event) 986 { 987 if (event->event == IB_EVENT_PORT_ERR || 988 event->event == IB_EVENT_PORT_ACTIVE || 989 event->event == IB_EVENT_LID_CHANGE || 990 event->event == IB_EVENT_PKEY_CHANGE || 991 event->event == IB_EVENT_SM_CHANGE || 992 event->event == IB_EVENT_CLIENT_REREGISTER) { 993 unsigned long flags; 994 struct ib_sa_device *sa_dev = 995 container_of(handler, typeof(*sa_dev), event_handler); 996 struct ib_sa_port *port = 997 &sa_dev->port[event->element.port_num - sa_dev->start_port]; 998 999 if (!rdma_cap_ib_sa(handler->device, port->port_num)) 1000 return; 1001 1002 spin_lock_irqsave(&port->ah_lock, flags); 1003 if (port->sm_ah) 1004 kref_put(&port->sm_ah->ref, free_sm_ah); 1005 port->sm_ah = NULL; 1006 spin_unlock_irqrestore(&port->ah_lock, flags); 1007 1008 if (event->event == IB_EVENT_SM_CHANGE || 1009 event->event == IB_EVENT_CLIENT_REREGISTER || 1010 event->event == IB_EVENT_LID_CHANGE) { 1011 spin_lock_irqsave(&port->classport_lock, flags); 1012 port->classport_info.valid = false; 1013 spin_unlock_irqrestore(&port->classport_lock, flags); 1014 } 1015 queue_work(ib_wq, &sa_dev->port[event->element.port_num - 1016 sa_dev->start_port].update_task); 1017 } 1018 } 1019 1020 void ib_sa_register_client(struct ib_sa_client *client) 1021 { 1022 atomic_set(&client->users, 1); 1023 init_completion(&client->comp); 1024 } 1025 EXPORT_SYMBOL(ib_sa_register_client); 1026 1027 void ib_sa_unregister_client(struct ib_sa_client *client) 1028 { 1029 ib_sa_client_put(client); 1030 wait_for_completion(&client->comp); 1031 } 1032 EXPORT_SYMBOL(ib_sa_unregister_client); 1033 1034 /** 1035 * ib_sa_cancel_query - try to cancel an SA query 1036 * @id:ID of query to cancel 1037 * @query:query pointer to cancel 1038 * 1039 * Try to cancel an SA query. If the id and query don't match up or 1040 * the query has already completed, nothing is done. Otherwise the 1041 * query is canceled and will complete with a status of -EINTR. 1042 */ 1043 void ib_sa_cancel_query(int id, struct ib_sa_query *query) 1044 { 1045 unsigned long flags; 1046 struct ib_mad_agent *agent; 1047 struct ib_mad_send_buf *mad_buf; 1048 1049 spin_lock_irqsave(&idr_lock, flags); 1050 if (idr_find(&query_idr, id) != query) { 1051 spin_unlock_irqrestore(&idr_lock, flags); 1052 return; 1053 } 1054 agent = query->port->agent; 1055 mad_buf = query->mad_buf; 1056 spin_unlock_irqrestore(&idr_lock, flags); 1057 1058 /* 1059 * If the query is still on the netlink request list, schedule 1060 * it to be cancelled by the timeout routine. Otherwise, it has been 1061 * sent to the MAD layer and has to be cancelled from there. 1062 */ 1063 if (!ib_nl_cancel_request(query)) 1064 ib_cancel_mad(agent, mad_buf); 1065 } 1066 EXPORT_SYMBOL(ib_sa_cancel_query); 1067 1068 static u8 get_src_path_mask(struct ib_device *device, u8 port_num) 1069 { 1070 struct ib_sa_device *sa_dev; 1071 struct ib_sa_port *port; 1072 unsigned long flags; 1073 u8 src_path_mask; 1074 1075 sa_dev = ib_get_client_data(device, &sa_client); 1076 if (!sa_dev) 1077 return 0x7f; 1078 1079 port = &sa_dev->port[port_num - sa_dev->start_port]; 1080 spin_lock_irqsave(&port->ah_lock, flags); 1081 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f; 1082 spin_unlock_irqrestore(&port->ah_lock, flags); 1083 1084 return src_path_mask; 1085 } 1086 1087 int ib_init_ah_from_path(struct ib_device *device, u8 port_num, 1088 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr) 1089 { 1090 int ret; 1091 u16 gid_index; 1092 int use_roce; 1093 struct net_device *ndev = NULL; 1094 1095 memset(ah_attr, 0, sizeof *ah_attr); 1096 ah_attr->dlid = be16_to_cpu(rec->dlid); 1097 ah_attr->sl = rec->sl; 1098 ah_attr->src_path_bits = be16_to_cpu(rec->slid) & 1099 get_src_path_mask(device, port_num); 1100 ah_attr->port_num = port_num; 1101 ah_attr->static_rate = rec->rate; 1102 1103 use_roce = rdma_cap_eth_ah(device, port_num); 1104 1105 if (use_roce) { 1106 struct net_device *idev; 1107 struct net_device *resolved_dev; 1108 struct rdma_dev_addr dev_addr = {.bound_dev_if = rec->ifindex, 1109 .net = rec->net ? rec->net : 1110 &init_net}; 1111 union { 1112 struct sockaddr _sockaddr; 1113 struct sockaddr_in _sockaddr_in; 1114 struct sockaddr_in6 _sockaddr_in6; 1115 } sgid_addr, dgid_addr; 1116 1117 if (!device->get_netdev) 1118 return -EOPNOTSUPP; 1119 1120 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid); 1121 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid); 1122 1123 /* validate the route */ 1124 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr, 1125 &dgid_addr._sockaddr, &dev_addr); 1126 if (ret) 1127 return ret; 1128 1129 if ((dev_addr.network == RDMA_NETWORK_IPV4 || 1130 dev_addr.network == RDMA_NETWORK_IPV6) && 1131 rec->gid_type != IB_GID_TYPE_ROCE_UDP_ENCAP) 1132 return -EINVAL; 1133 1134 idev = device->get_netdev(device, port_num); 1135 if (!idev) 1136 return -ENODEV; 1137 1138 resolved_dev = dev_get_by_index(dev_addr.net, 1139 dev_addr.bound_dev_if); 1140 if (resolved_dev->flags & IFF_LOOPBACK) { 1141 dev_put(resolved_dev); 1142 resolved_dev = idev; 1143 dev_hold(resolved_dev); 1144 } 1145 ndev = ib_get_ndev_from_path(rec); 1146 rcu_read_lock(); 1147 if ((ndev && ndev != resolved_dev) || 1148 (resolved_dev != idev && 1149 !rdma_is_upper_dev_rcu(idev, resolved_dev))) 1150 ret = -EHOSTUNREACH; 1151 rcu_read_unlock(); 1152 dev_put(idev); 1153 dev_put(resolved_dev); 1154 if (ret) { 1155 if (ndev) 1156 dev_put(ndev); 1157 return ret; 1158 } 1159 } 1160 1161 if (rec->hop_limit > 0 || use_roce) { 1162 ah_attr->ah_flags = IB_AH_GRH; 1163 ah_attr->grh.dgid = rec->dgid; 1164 1165 ret = ib_find_cached_gid_by_port(device, &rec->sgid, 1166 rec->gid_type, port_num, ndev, 1167 &gid_index); 1168 if (ret) { 1169 if (ndev) 1170 dev_put(ndev); 1171 return ret; 1172 } 1173 1174 ah_attr->grh.sgid_index = gid_index; 1175 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label); 1176 ah_attr->grh.hop_limit = rec->hop_limit; 1177 ah_attr->grh.traffic_class = rec->traffic_class; 1178 if (ndev) 1179 dev_put(ndev); 1180 } 1181 1182 if (use_roce) 1183 memcpy(ah_attr->dmac, rec->dmac, ETH_ALEN); 1184 1185 return 0; 1186 } 1187 EXPORT_SYMBOL(ib_init_ah_from_path); 1188 1189 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask) 1190 { 1191 unsigned long flags; 1192 1193 spin_lock_irqsave(&query->port->ah_lock, flags); 1194 if (!query->port->sm_ah) { 1195 spin_unlock_irqrestore(&query->port->ah_lock, flags); 1196 return -EAGAIN; 1197 } 1198 kref_get(&query->port->sm_ah->ref); 1199 query->sm_ah = query->port->sm_ah; 1200 spin_unlock_irqrestore(&query->port->ah_lock, flags); 1201 1202 query->mad_buf = ib_create_send_mad(query->port->agent, 1, 1203 query->sm_ah->pkey_index, 1204 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA, 1205 gfp_mask, 1206 IB_MGMT_BASE_VERSION); 1207 if (IS_ERR(query->mad_buf)) { 1208 kref_put(&query->sm_ah->ref, free_sm_ah); 1209 return -ENOMEM; 1210 } 1211 1212 query->mad_buf->ah = query->sm_ah->ah; 1213 1214 return 0; 1215 } 1216 1217 static void free_mad(struct ib_sa_query *query) 1218 { 1219 ib_free_send_mad(query->mad_buf); 1220 kref_put(&query->sm_ah->ref, free_sm_ah); 1221 } 1222 1223 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent) 1224 { 1225 unsigned long flags; 1226 1227 memset(mad, 0, sizeof *mad); 1228 1229 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION; 1230 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; 1231 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION; 1232 1233 spin_lock_irqsave(&tid_lock, flags); 1234 mad->mad_hdr.tid = 1235 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++); 1236 spin_unlock_irqrestore(&tid_lock, flags); 1237 } 1238 1239 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask) 1240 { 1241 bool preload = gfpflags_allow_blocking(gfp_mask); 1242 unsigned long flags; 1243 int ret, id; 1244 1245 if (preload) 1246 idr_preload(gfp_mask); 1247 spin_lock_irqsave(&idr_lock, flags); 1248 1249 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT); 1250 1251 spin_unlock_irqrestore(&idr_lock, flags); 1252 if (preload) 1253 idr_preload_end(); 1254 if (id < 0) 1255 return id; 1256 1257 query->mad_buf->timeout_ms = timeout_ms; 1258 query->mad_buf->context[0] = query; 1259 query->id = id; 1260 1261 if (query->flags & IB_SA_ENABLE_LOCAL_SERVICE) { 1262 if (!ibnl_chk_listeners(RDMA_NL_GROUP_LS)) { 1263 if (!ib_nl_make_request(query, gfp_mask)) 1264 return id; 1265 } 1266 ib_sa_disable_local_svc(query); 1267 } 1268 1269 ret = ib_post_send_mad(query->mad_buf, NULL); 1270 if (ret) { 1271 spin_lock_irqsave(&idr_lock, flags); 1272 idr_remove(&query_idr, id); 1273 spin_unlock_irqrestore(&idr_lock, flags); 1274 } 1275 1276 /* 1277 * It's not safe to dereference query any more, because the 1278 * send may already have completed and freed the query in 1279 * another context. 1280 */ 1281 return ret ? ret : id; 1282 } 1283 1284 void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec) 1285 { 1286 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec); 1287 } 1288 EXPORT_SYMBOL(ib_sa_unpack_path); 1289 1290 void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute) 1291 { 1292 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute); 1293 } 1294 EXPORT_SYMBOL(ib_sa_pack_path); 1295 1296 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query, 1297 int status, 1298 struct ib_sa_mad *mad) 1299 { 1300 struct ib_sa_path_query *query = 1301 container_of(sa_query, struct ib_sa_path_query, sa_query); 1302 1303 if (mad) { 1304 struct ib_sa_path_rec rec; 1305 1306 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), 1307 mad->data, &rec); 1308 rec.net = NULL; 1309 rec.ifindex = 0; 1310 rec.gid_type = IB_GID_TYPE_IB; 1311 eth_zero_addr(rec.dmac); 1312 query->callback(status, &rec, query->context); 1313 } else 1314 query->callback(status, NULL, query->context); 1315 } 1316 1317 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query) 1318 { 1319 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query)); 1320 } 1321 1322 /** 1323 * ib_sa_path_rec_get - Start a Path get query 1324 * @client:SA client 1325 * @device:device to send query on 1326 * @port_num: port number to send query on 1327 * @rec:Path Record to send in query 1328 * @comp_mask:component mask to send in query 1329 * @timeout_ms:time to wait for response 1330 * @gfp_mask:GFP mask to use for internal allocations 1331 * @callback:function called when query completes, times out or is 1332 * canceled 1333 * @context:opaque user context passed to callback 1334 * @sa_query:query context, used to cancel query 1335 * 1336 * Send a Path Record Get query to the SA to look up a path. The 1337 * callback function will be called when the query completes (or 1338 * fails); status is 0 for a successful response, -EINTR if the query 1339 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error 1340 * occurred sending the query. The resp parameter of the callback is 1341 * only valid if status is 0. 1342 * 1343 * If the return value of ib_sa_path_rec_get() is negative, it is an 1344 * error code. Otherwise it is a query ID that can be used to cancel 1345 * the query. 1346 */ 1347 int ib_sa_path_rec_get(struct ib_sa_client *client, 1348 struct ib_device *device, u8 port_num, 1349 struct ib_sa_path_rec *rec, 1350 ib_sa_comp_mask comp_mask, 1351 int timeout_ms, gfp_t gfp_mask, 1352 void (*callback)(int status, 1353 struct ib_sa_path_rec *resp, 1354 void *context), 1355 void *context, 1356 struct ib_sa_query **sa_query) 1357 { 1358 struct ib_sa_path_query *query; 1359 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1360 struct ib_sa_port *port; 1361 struct ib_mad_agent *agent; 1362 struct ib_sa_mad *mad; 1363 int ret; 1364 1365 if (!sa_dev) 1366 return -ENODEV; 1367 1368 port = &sa_dev->port[port_num - sa_dev->start_port]; 1369 agent = port->agent; 1370 1371 query = kzalloc(sizeof(*query), gfp_mask); 1372 if (!query) 1373 return -ENOMEM; 1374 1375 query->sa_query.port = port; 1376 ret = alloc_mad(&query->sa_query, gfp_mask); 1377 if (ret) 1378 goto err1; 1379 1380 ib_sa_client_get(client); 1381 query->sa_query.client = client; 1382 query->callback = callback; 1383 query->context = context; 1384 1385 mad = query->sa_query.mad_buf->mad; 1386 init_mad(mad, agent); 1387 1388 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL; 1389 query->sa_query.release = ib_sa_path_rec_release; 1390 mad->mad_hdr.method = IB_MGMT_METHOD_GET; 1391 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC); 1392 mad->sa_hdr.comp_mask = comp_mask; 1393 1394 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data); 1395 1396 *sa_query = &query->sa_query; 1397 1398 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE; 1399 query->sa_query.mad_buf->context[1] = rec; 1400 1401 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1402 if (ret < 0) 1403 goto err2; 1404 1405 return ret; 1406 1407 err2: 1408 *sa_query = NULL; 1409 ib_sa_client_put(query->sa_query.client); 1410 free_mad(&query->sa_query); 1411 1412 err1: 1413 kfree(query); 1414 return ret; 1415 } 1416 EXPORT_SYMBOL(ib_sa_path_rec_get); 1417 1418 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query, 1419 int status, 1420 struct ib_sa_mad *mad) 1421 { 1422 struct ib_sa_service_query *query = 1423 container_of(sa_query, struct ib_sa_service_query, sa_query); 1424 1425 if (mad) { 1426 struct ib_sa_service_rec rec; 1427 1428 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table), 1429 mad->data, &rec); 1430 query->callback(status, &rec, query->context); 1431 } else 1432 query->callback(status, NULL, query->context); 1433 } 1434 1435 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query) 1436 { 1437 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query)); 1438 } 1439 1440 /** 1441 * ib_sa_service_rec_query - Start Service Record operation 1442 * @client:SA client 1443 * @device:device to send request on 1444 * @port_num: port number to send request on 1445 * @method:SA method - should be get, set, or delete 1446 * @rec:Service Record to send in request 1447 * @comp_mask:component mask to send in request 1448 * @timeout_ms:time to wait for response 1449 * @gfp_mask:GFP mask to use for internal allocations 1450 * @callback:function called when request completes, times out or is 1451 * canceled 1452 * @context:opaque user context passed to callback 1453 * @sa_query:request context, used to cancel request 1454 * 1455 * Send a Service Record set/get/delete to the SA to register, 1456 * unregister or query a service record. 1457 * The callback function will be called when the request completes (or 1458 * fails); status is 0 for a successful response, -EINTR if the query 1459 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error 1460 * occurred sending the query. The resp parameter of the callback is 1461 * only valid if status is 0. 1462 * 1463 * If the return value of ib_sa_service_rec_query() is negative, it is an 1464 * error code. Otherwise it is a request ID that can be used to cancel 1465 * the query. 1466 */ 1467 int ib_sa_service_rec_query(struct ib_sa_client *client, 1468 struct ib_device *device, u8 port_num, u8 method, 1469 struct ib_sa_service_rec *rec, 1470 ib_sa_comp_mask comp_mask, 1471 int timeout_ms, gfp_t gfp_mask, 1472 void (*callback)(int status, 1473 struct ib_sa_service_rec *resp, 1474 void *context), 1475 void *context, 1476 struct ib_sa_query **sa_query) 1477 { 1478 struct ib_sa_service_query *query; 1479 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1480 struct ib_sa_port *port; 1481 struct ib_mad_agent *agent; 1482 struct ib_sa_mad *mad; 1483 int ret; 1484 1485 if (!sa_dev) 1486 return -ENODEV; 1487 1488 port = &sa_dev->port[port_num - sa_dev->start_port]; 1489 agent = port->agent; 1490 1491 if (method != IB_MGMT_METHOD_GET && 1492 method != IB_MGMT_METHOD_SET && 1493 method != IB_SA_METHOD_DELETE) 1494 return -EINVAL; 1495 1496 query = kzalloc(sizeof(*query), gfp_mask); 1497 if (!query) 1498 return -ENOMEM; 1499 1500 query->sa_query.port = port; 1501 ret = alloc_mad(&query->sa_query, gfp_mask); 1502 if (ret) 1503 goto err1; 1504 1505 ib_sa_client_get(client); 1506 query->sa_query.client = client; 1507 query->callback = callback; 1508 query->context = context; 1509 1510 mad = query->sa_query.mad_buf->mad; 1511 init_mad(mad, agent); 1512 1513 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL; 1514 query->sa_query.release = ib_sa_service_rec_release; 1515 mad->mad_hdr.method = method; 1516 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC); 1517 mad->sa_hdr.comp_mask = comp_mask; 1518 1519 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table), 1520 rec, mad->data); 1521 1522 *sa_query = &query->sa_query; 1523 1524 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1525 if (ret < 0) 1526 goto err2; 1527 1528 return ret; 1529 1530 err2: 1531 *sa_query = NULL; 1532 ib_sa_client_put(query->sa_query.client); 1533 free_mad(&query->sa_query); 1534 1535 err1: 1536 kfree(query); 1537 return ret; 1538 } 1539 EXPORT_SYMBOL(ib_sa_service_rec_query); 1540 1541 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query, 1542 int status, 1543 struct ib_sa_mad *mad) 1544 { 1545 struct ib_sa_mcmember_query *query = 1546 container_of(sa_query, struct ib_sa_mcmember_query, sa_query); 1547 1548 if (mad) { 1549 struct ib_sa_mcmember_rec rec; 1550 1551 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), 1552 mad->data, &rec); 1553 query->callback(status, &rec, query->context); 1554 } else 1555 query->callback(status, NULL, query->context); 1556 } 1557 1558 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query) 1559 { 1560 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query)); 1561 } 1562 1563 int ib_sa_mcmember_rec_query(struct ib_sa_client *client, 1564 struct ib_device *device, u8 port_num, 1565 u8 method, 1566 struct ib_sa_mcmember_rec *rec, 1567 ib_sa_comp_mask comp_mask, 1568 int timeout_ms, gfp_t gfp_mask, 1569 void (*callback)(int status, 1570 struct ib_sa_mcmember_rec *resp, 1571 void *context), 1572 void *context, 1573 struct ib_sa_query **sa_query) 1574 { 1575 struct ib_sa_mcmember_query *query; 1576 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1577 struct ib_sa_port *port; 1578 struct ib_mad_agent *agent; 1579 struct ib_sa_mad *mad; 1580 int ret; 1581 1582 if (!sa_dev) 1583 return -ENODEV; 1584 1585 port = &sa_dev->port[port_num - sa_dev->start_port]; 1586 agent = port->agent; 1587 1588 query = kzalloc(sizeof(*query), gfp_mask); 1589 if (!query) 1590 return -ENOMEM; 1591 1592 query->sa_query.port = port; 1593 ret = alloc_mad(&query->sa_query, gfp_mask); 1594 if (ret) 1595 goto err1; 1596 1597 ib_sa_client_get(client); 1598 query->sa_query.client = client; 1599 query->callback = callback; 1600 query->context = context; 1601 1602 mad = query->sa_query.mad_buf->mad; 1603 init_mad(mad, agent); 1604 1605 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL; 1606 query->sa_query.release = ib_sa_mcmember_rec_release; 1607 mad->mad_hdr.method = method; 1608 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC); 1609 mad->sa_hdr.comp_mask = comp_mask; 1610 1611 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), 1612 rec, mad->data); 1613 1614 *sa_query = &query->sa_query; 1615 1616 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1617 if (ret < 0) 1618 goto err2; 1619 1620 return ret; 1621 1622 err2: 1623 *sa_query = NULL; 1624 ib_sa_client_put(query->sa_query.client); 1625 free_mad(&query->sa_query); 1626 1627 err1: 1628 kfree(query); 1629 return ret; 1630 } 1631 1632 /* Support GuidInfoRecord */ 1633 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query, 1634 int status, 1635 struct ib_sa_mad *mad) 1636 { 1637 struct ib_sa_guidinfo_query *query = 1638 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query); 1639 1640 if (mad) { 1641 struct ib_sa_guidinfo_rec rec; 1642 1643 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), 1644 mad->data, &rec); 1645 query->callback(status, &rec, query->context); 1646 } else 1647 query->callback(status, NULL, query->context); 1648 } 1649 1650 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query) 1651 { 1652 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query)); 1653 } 1654 1655 int ib_sa_guid_info_rec_query(struct ib_sa_client *client, 1656 struct ib_device *device, u8 port_num, 1657 struct ib_sa_guidinfo_rec *rec, 1658 ib_sa_comp_mask comp_mask, u8 method, 1659 int timeout_ms, gfp_t gfp_mask, 1660 void (*callback)(int status, 1661 struct ib_sa_guidinfo_rec *resp, 1662 void *context), 1663 void *context, 1664 struct ib_sa_query **sa_query) 1665 { 1666 struct ib_sa_guidinfo_query *query; 1667 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1668 struct ib_sa_port *port; 1669 struct ib_mad_agent *agent; 1670 struct ib_sa_mad *mad; 1671 int ret; 1672 1673 if (!sa_dev) 1674 return -ENODEV; 1675 1676 if (method != IB_MGMT_METHOD_GET && 1677 method != IB_MGMT_METHOD_SET && 1678 method != IB_SA_METHOD_DELETE) { 1679 return -EINVAL; 1680 } 1681 1682 port = &sa_dev->port[port_num - sa_dev->start_port]; 1683 agent = port->agent; 1684 1685 query = kzalloc(sizeof(*query), gfp_mask); 1686 if (!query) 1687 return -ENOMEM; 1688 1689 query->sa_query.port = port; 1690 ret = alloc_mad(&query->sa_query, gfp_mask); 1691 if (ret) 1692 goto err1; 1693 1694 ib_sa_client_get(client); 1695 query->sa_query.client = client; 1696 query->callback = callback; 1697 query->context = context; 1698 1699 mad = query->sa_query.mad_buf->mad; 1700 init_mad(mad, agent); 1701 1702 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL; 1703 query->sa_query.release = ib_sa_guidinfo_rec_release; 1704 1705 mad->mad_hdr.method = method; 1706 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC); 1707 mad->sa_hdr.comp_mask = comp_mask; 1708 1709 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec, 1710 mad->data); 1711 1712 *sa_query = &query->sa_query; 1713 1714 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1715 if (ret < 0) 1716 goto err2; 1717 1718 return ret; 1719 1720 err2: 1721 *sa_query = NULL; 1722 ib_sa_client_put(query->sa_query.client); 1723 free_mad(&query->sa_query); 1724 1725 err1: 1726 kfree(query); 1727 return ret; 1728 } 1729 EXPORT_SYMBOL(ib_sa_guid_info_rec_query); 1730 1731 /* Support get SA ClassPortInfo */ 1732 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query, 1733 int status, 1734 struct ib_sa_mad *mad) 1735 { 1736 unsigned long flags; 1737 struct ib_sa_classport_info_query *query = 1738 container_of(sa_query, struct ib_sa_classport_info_query, sa_query); 1739 1740 if (mad) { 1741 struct ib_class_port_info rec; 1742 1743 ib_unpack(classport_info_rec_table, 1744 ARRAY_SIZE(classport_info_rec_table), 1745 mad->data, &rec); 1746 1747 spin_lock_irqsave(&sa_query->port->classport_lock, flags); 1748 if (!status && !sa_query->port->classport_info.valid) { 1749 memcpy(&sa_query->port->classport_info.data, &rec, 1750 sizeof(sa_query->port->classport_info.data)); 1751 1752 sa_query->port->classport_info.valid = true; 1753 } 1754 spin_unlock_irqrestore(&sa_query->port->classport_lock, flags); 1755 1756 query->callback(status, &rec, query->context); 1757 } else { 1758 query->callback(status, NULL, query->context); 1759 } 1760 } 1761 1762 static void ib_sa_portclass_info_rec_release(struct ib_sa_query *sa_query) 1763 { 1764 kfree(container_of(sa_query, struct ib_sa_classport_info_query, 1765 sa_query)); 1766 } 1767 1768 int ib_sa_classport_info_rec_query(struct ib_sa_client *client, 1769 struct ib_device *device, u8 port_num, 1770 int timeout_ms, gfp_t gfp_mask, 1771 void (*callback)(int status, 1772 struct ib_class_port_info *resp, 1773 void *context), 1774 void *context, 1775 struct ib_sa_query **sa_query) 1776 { 1777 struct ib_sa_classport_info_query *query; 1778 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); 1779 struct ib_sa_port *port; 1780 struct ib_mad_agent *agent; 1781 struct ib_sa_mad *mad; 1782 struct ib_class_port_info cached_class_port_info; 1783 int ret; 1784 unsigned long flags; 1785 1786 if (!sa_dev) 1787 return -ENODEV; 1788 1789 port = &sa_dev->port[port_num - sa_dev->start_port]; 1790 agent = port->agent; 1791 1792 /* Use cached ClassPortInfo attribute if valid instead of sending mad */ 1793 spin_lock_irqsave(&port->classport_lock, flags); 1794 if (port->classport_info.valid && callback) { 1795 memcpy(&cached_class_port_info, &port->classport_info.data, 1796 sizeof(cached_class_port_info)); 1797 spin_unlock_irqrestore(&port->classport_lock, flags); 1798 callback(0, &cached_class_port_info, context); 1799 return 0; 1800 } 1801 spin_unlock_irqrestore(&port->classport_lock, flags); 1802 1803 query = kzalloc(sizeof(*query), gfp_mask); 1804 if (!query) 1805 return -ENOMEM; 1806 1807 query->sa_query.port = port; 1808 ret = alloc_mad(&query->sa_query, gfp_mask); 1809 if (ret) 1810 goto err1; 1811 1812 ib_sa_client_get(client); 1813 query->sa_query.client = client; 1814 query->callback = callback; 1815 query->context = context; 1816 1817 mad = query->sa_query.mad_buf->mad; 1818 init_mad(mad, agent); 1819 1820 query->sa_query.callback = callback ? ib_sa_classport_info_rec_callback : NULL; 1821 1822 query->sa_query.release = ib_sa_portclass_info_rec_release; 1823 /* support GET only */ 1824 mad->mad_hdr.method = IB_MGMT_METHOD_GET; 1825 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO); 1826 mad->sa_hdr.comp_mask = 0; 1827 *sa_query = &query->sa_query; 1828 1829 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); 1830 if (ret < 0) 1831 goto err2; 1832 1833 return ret; 1834 1835 err2: 1836 *sa_query = NULL; 1837 ib_sa_client_put(query->sa_query.client); 1838 free_mad(&query->sa_query); 1839 1840 err1: 1841 kfree(query); 1842 return ret; 1843 } 1844 EXPORT_SYMBOL(ib_sa_classport_info_rec_query); 1845 1846 static void send_handler(struct ib_mad_agent *agent, 1847 struct ib_mad_send_wc *mad_send_wc) 1848 { 1849 struct ib_sa_query *query = mad_send_wc->send_buf->context[0]; 1850 unsigned long flags; 1851 1852 if (query->callback) 1853 switch (mad_send_wc->status) { 1854 case IB_WC_SUCCESS: 1855 /* No callback -- already got recv */ 1856 break; 1857 case IB_WC_RESP_TIMEOUT_ERR: 1858 query->callback(query, -ETIMEDOUT, NULL); 1859 break; 1860 case IB_WC_WR_FLUSH_ERR: 1861 query->callback(query, -EINTR, NULL); 1862 break; 1863 default: 1864 query->callback(query, -EIO, NULL); 1865 break; 1866 } 1867 1868 spin_lock_irqsave(&idr_lock, flags); 1869 idr_remove(&query_idr, query->id); 1870 spin_unlock_irqrestore(&idr_lock, flags); 1871 1872 free_mad(query); 1873 ib_sa_client_put(query->client); 1874 query->release(query); 1875 } 1876 1877 static void recv_handler(struct ib_mad_agent *mad_agent, 1878 struct ib_mad_send_buf *send_buf, 1879 struct ib_mad_recv_wc *mad_recv_wc) 1880 { 1881 struct ib_sa_query *query; 1882 1883 if (!send_buf) 1884 return; 1885 1886 query = send_buf->context[0]; 1887 if (query->callback) { 1888 if (mad_recv_wc->wc->status == IB_WC_SUCCESS) 1889 query->callback(query, 1890 mad_recv_wc->recv_buf.mad->mad_hdr.status ? 1891 -EINVAL : 0, 1892 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad); 1893 else 1894 query->callback(query, -EIO, NULL); 1895 } 1896 1897 ib_free_recv_mad(mad_recv_wc); 1898 } 1899 1900 static void ib_sa_add_one(struct ib_device *device) 1901 { 1902 struct ib_sa_device *sa_dev; 1903 int s, e, i; 1904 int count = 0; 1905 1906 s = rdma_start_port(device); 1907 e = rdma_end_port(device); 1908 1909 sa_dev = kzalloc(sizeof *sa_dev + 1910 (e - s + 1) * sizeof (struct ib_sa_port), 1911 GFP_KERNEL); 1912 if (!sa_dev) 1913 return; 1914 1915 sa_dev->start_port = s; 1916 sa_dev->end_port = e; 1917 1918 for (i = 0; i <= e - s; ++i) { 1919 spin_lock_init(&sa_dev->port[i].ah_lock); 1920 if (!rdma_cap_ib_sa(device, i + 1)) 1921 continue; 1922 1923 sa_dev->port[i].sm_ah = NULL; 1924 sa_dev->port[i].port_num = i + s; 1925 1926 spin_lock_init(&sa_dev->port[i].classport_lock); 1927 sa_dev->port[i].classport_info.valid = false; 1928 1929 sa_dev->port[i].agent = 1930 ib_register_mad_agent(device, i + s, IB_QPT_GSI, 1931 NULL, 0, send_handler, 1932 recv_handler, sa_dev, 0); 1933 if (IS_ERR(sa_dev->port[i].agent)) 1934 goto err; 1935 1936 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah); 1937 1938 count++; 1939 } 1940 1941 if (!count) 1942 goto free; 1943 1944 ib_set_client_data(device, &sa_client, sa_dev); 1945 1946 /* 1947 * We register our event handler after everything is set up, 1948 * and then update our cached info after the event handler is 1949 * registered to avoid any problems if a port changes state 1950 * during our initialization. 1951 */ 1952 1953 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event); 1954 if (ib_register_event_handler(&sa_dev->event_handler)) 1955 goto err; 1956 1957 for (i = 0; i <= e - s; ++i) { 1958 if (rdma_cap_ib_sa(device, i + 1)) 1959 update_sm_ah(&sa_dev->port[i].update_task); 1960 } 1961 1962 return; 1963 1964 err: 1965 while (--i >= 0) { 1966 if (rdma_cap_ib_sa(device, i + 1)) 1967 ib_unregister_mad_agent(sa_dev->port[i].agent); 1968 } 1969 free: 1970 kfree(sa_dev); 1971 return; 1972 } 1973 1974 static void ib_sa_remove_one(struct ib_device *device, void *client_data) 1975 { 1976 struct ib_sa_device *sa_dev = client_data; 1977 int i; 1978 1979 if (!sa_dev) 1980 return; 1981 1982 ib_unregister_event_handler(&sa_dev->event_handler); 1983 1984 flush_workqueue(ib_wq); 1985 1986 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) { 1987 if (rdma_cap_ib_sa(device, i + 1)) { 1988 ib_unregister_mad_agent(sa_dev->port[i].agent); 1989 if (sa_dev->port[i].sm_ah) 1990 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah); 1991 } 1992 1993 } 1994 1995 kfree(sa_dev); 1996 } 1997 1998 int ib_sa_init(void) 1999 { 2000 int ret; 2001 2002 get_random_bytes(&tid, sizeof tid); 2003 2004 atomic_set(&ib_nl_sa_request_seq, 0); 2005 2006 ret = ib_register_client(&sa_client); 2007 if (ret) { 2008 pr_err("Couldn't register ib_sa client\n"); 2009 goto err1; 2010 } 2011 2012 ret = mcast_init(); 2013 if (ret) { 2014 pr_err("Couldn't initialize multicast handling\n"); 2015 goto err2; 2016 } 2017 2018 ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM); 2019 if (!ib_nl_wq) { 2020 ret = -ENOMEM; 2021 goto err3; 2022 } 2023 2024 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout); 2025 2026 return 0; 2027 2028 err3: 2029 mcast_cleanup(); 2030 err2: 2031 ib_unregister_client(&sa_client); 2032 err1: 2033 return ret; 2034 } 2035 2036 void ib_sa_cleanup(void) 2037 { 2038 cancel_delayed_work(&ib_nl_timed_work); 2039 flush_workqueue(ib_nl_wq); 2040 destroy_workqueue(ib_nl_wq); 2041 mcast_cleanup(); 2042 ib_unregister_client(&sa_client); 2043 idr_destroy(&query_idr); 2044 } 2045