1219820Sjeff/* 2219820Sjeff * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. 3219820Sjeff * 4219820Sjeff * This software is available to you under a choice of one of two 5219820Sjeff * licenses. You may choose to be licensed under the terms of the GNU 6219820Sjeff * General Public License (GPL) Version 2, available from the file 7219820Sjeff * COPYING in the main directory of this source tree, or the 8219820Sjeff * OpenIB.org BSD license below: 9219820Sjeff * 10219820Sjeff * Redistribution and use in source and binary forms, with or 11219820Sjeff * without modification, are permitted provided that the following 12219820Sjeff * conditions are met: 13219820Sjeff * 14219820Sjeff * - Redistributions of source code must retain the above 15219820Sjeff * copyright notice, this list of conditions and the following 16219820Sjeff * disclaimer. 17219820Sjeff * 18219820Sjeff * - Redistributions in binary form must reproduce the above 19219820Sjeff * copyright notice, this list of conditions and the following 20219820Sjeff * disclaimer in the documentation and/or other materials 21219820Sjeff * provided with the distribution. 22219820Sjeff * 23219820Sjeff * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24219820Sjeff * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25219820Sjeff * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26219820Sjeff * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27219820Sjeff * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28219820Sjeff * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29219820Sjeff * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30219820Sjeff * SOFTWARE. 31219820Sjeff */ 32219820Sjeff 33219820Sjeff#include <linux/completion.h> 34219820Sjeff#include <linux/file.h> 35219820Sjeff#include <linux/mutex.h> 36219820Sjeff#include <linux/poll.h> 37219820Sjeff#include <linux/idr.h> 38219820Sjeff#include <linux/in.h> 39219820Sjeff#include <linux/in6.h> 40219820Sjeff#include <linux/miscdevice.h> 41219820Sjeff 42304846Shselasky#include <sys/filio.h> 43304846Shselasky 44219820Sjeff#include <rdma/rdma_user_cm.h> 45219820Sjeff#include <rdma/ib_marshall.h> 46219820Sjeff#include <rdma/rdma_cm.h> 47219820Sjeff#include <rdma/rdma_cm_ib.h> 48219820Sjeff 49219820SjeffMODULE_AUTHOR("Sean Hefty"); 50219820SjeffMODULE_DESCRIPTION("RDMA Userspace Connection Manager Access"); 51219820SjeffMODULE_LICENSE("Dual BSD/GPL"); 52219820Sjeff 53219820Sjeffenum { 54219820Sjeff UCMA_MAX_BACKLOG = 1024 55219820Sjeff}; 56219820Sjeff 57219820Sjeffstruct ucma_file { 58219820Sjeff struct mutex mut; 59219820Sjeff struct file *filp; 60219820Sjeff struct list_head ctx_list; 61219820Sjeff struct list_head event_list; 62219820Sjeff wait_queue_head_t poll_wait; 63219820Sjeff}; 64219820Sjeff 65219820Sjeffstruct ucma_context { 66219820Sjeff int id; 67219820Sjeff struct completion comp; 68219820Sjeff atomic_t ref; 69219820Sjeff int events_reported; 70219820Sjeff int backlog; 71219820Sjeff 72219820Sjeff struct ucma_file *file; 73219820Sjeff struct rdma_cm_id *cm_id; 74219820Sjeff u64 uid; 75219820Sjeff 76219820Sjeff struct list_head list; 77219820Sjeff struct list_head mc_list; 78219820Sjeff}; 79219820Sjeff 80219820Sjeffstruct ucma_multicast { 81219820Sjeff struct ucma_context *ctx; 82219820Sjeff int id; 83219820Sjeff int events_reported; 84219820Sjeff 85219820Sjeff u64 uid; 86219820Sjeff struct list_head list; 87219820Sjeff struct sockaddr_storage addr; 88219820Sjeff}; 89219820Sjeff 90219820Sjeffstruct ucma_event { 91219820Sjeff struct ucma_context *ctx; 92219820Sjeff struct ucma_multicast *mc; 93219820Sjeff struct list_head list; 94219820Sjeff struct rdma_cm_id *cm_id; 95219820Sjeff struct rdma_ucm_event_resp resp; 96219820Sjeff}; 97219820Sjeff 98219820Sjeffstatic DEFINE_MUTEX(mut); 99219820Sjeffstatic DEFINE_IDR(ctx_idr); 100219820Sjeffstatic DEFINE_IDR(multicast_idr); 101219820Sjeff 102219820Sjeffstatic inline struct ucma_context *_ucma_find_context(int id, 103219820Sjeff struct ucma_file *file) 104219820Sjeff{ 105219820Sjeff struct ucma_context *ctx; 106219820Sjeff 107219820Sjeff ctx = idr_find(&ctx_idr, id); 108219820Sjeff if (!ctx) 109219820Sjeff ctx = ERR_PTR(-ENOENT); 110219820Sjeff else if (ctx->file != file) 111219820Sjeff ctx = ERR_PTR(-EINVAL); 112219820Sjeff return ctx; 113219820Sjeff} 114219820Sjeff 115219820Sjeffstatic struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) 116219820Sjeff{ 117219820Sjeff struct ucma_context *ctx; 118219820Sjeff 119219820Sjeff mutex_lock(&mut); 120219820Sjeff ctx = _ucma_find_context(id, file); 121219820Sjeff if (!IS_ERR(ctx)) 122219820Sjeff atomic_inc(&ctx->ref); 123219820Sjeff mutex_unlock(&mut); 124219820Sjeff return ctx; 125219820Sjeff} 126219820Sjeff 127219820Sjeffstatic void ucma_put_ctx(struct ucma_context *ctx) 128219820Sjeff{ 129219820Sjeff if (atomic_dec_and_test(&ctx->ref)) 130219820Sjeff complete(&ctx->comp); 131219820Sjeff} 132219820Sjeff 133219820Sjeffstatic struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) 134219820Sjeff{ 135219820Sjeff struct ucma_context *ctx; 136219820Sjeff int ret; 137219820Sjeff 138219820Sjeff ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 139219820Sjeff if (!ctx) 140219820Sjeff return NULL; 141219820Sjeff 142219820Sjeff atomic_set(&ctx->ref, 1); 143219820Sjeff init_completion(&ctx->comp); 144219820Sjeff INIT_LIST_HEAD(&ctx->mc_list); 145219820Sjeff ctx->file = file; 146219820Sjeff 147219820Sjeff do { 148219820Sjeff ret = idr_pre_get(&ctx_idr, GFP_KERNEL); 149219820Sjeff if (!ret) 150219820Sjeff goto error; 151219820Sjeff 152219820Sjeff mutex_lock(&mut); 153219820Sjeff ret = idr_get_new(&ctx_idr, ctx, &ctx->id); 154219820Sjeff mutex_unlock(&mut); 155219820Sjeff } while (ret == -EAGAIN); 156219820Sjeff 157219820Sjeff if (ret) 158219820Sjeff goto error; 159219820Sjeff 160219820Sjeff list_add_tail(&ctx->list, &file->ctx_list); 161219820Sjeff return ctx; 162219820Sjeff 163219820Sjefferror: 164219820Sjeff kfree(ctx); 165219820Sjeff return NULL; 166219820Sjeff} 167219820Sjeff 168219820Sjeffstatic struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) 169219820Sjeff{ 170219820Sjeff struct ucma_multicast *mc; 171219820Sjeff int ret; 172219820Sjeff 173219820Sjeff mc = kzalloc(sizeof(*mc), GFP_KERNEL); 174219820Sjeff if (!mc) 175219820Sjeff return NULL; 176219820Sjeff 177219820Sjeff do { 178219820Sjeff ret = idr_pre_get(&multicast_idr, GFP_KERNEL); 179219820Sjeff if (!ret) 180219820Sjeff goto error; 181219820Sjeff 182219820Sjeff mutex_lock(&mut); 183219820Sjeff ret = idr_get_new(&multicast_idr, mc, &mc->id); 184219820Sjeff mutex_unlock(&mut); 185219820Sjeff } while (ret == -EAGAIN); 186219820Sjeff 187219820Sjeff if (ret) 188219820Sjeff goto error; 189219820Sjeff 190219820Sjeff mc->ctx = ctx; 191219820Sjeff list_add_tail(&mc->list, &ctx->mc_list); 192219820Sjeff return mc; 193219820Sjeff 194219820Sjefferror: 195219820Sjeff kfree(mc); 196219820Sjeff return NULL; 197219820Sjeff} 198219820Sjeff 199219820Sjeffstatic void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, 200219820Sjeff struct rdma_conn_param *src) 201219820Sjeff{ 202219820Sjeff if (src->private_data_len) 203219820Sjeff memcpy(dst->private_data, src->private_data, 204219820Sjeff src->private_data_len); 205219820Sjeff dst->private_data_len = src->private_data_len; 206219820Sjeff dst->responder_resources =src->responder_resources; 207219820Sjeff dst->initiator_depth = src->initiator_depth; 208219820Sjeff dst->flow_control = src->flow_control; 209219820Sjeff dst->retry_count = src->retry_count; 210219820Sjeff dst->rnr_retry_count = src->rnr_retry_count; 211219820Sjeff dst->srq = src->srq; 212219820Sjeff dst->qp_num = src->qp_num; 213219820Sjeff} 214219820Sjeff 215219820Sjeffstatic void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst, 216219820Sjeff struct rdma_ud_param *src) 217219820Sjeff{ 218219820Sjeff if (src->private_data_len) 219219820Sjeff memcpy(dst->private_data, src->private_data, 220219820Sjeff src->private_data_len); 221219820Sjeff dst->private_data_len = src->private_data_len; 222219820Sjeff ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr); 223219820Sjeff dst->qp_num = src->qp_num; 224219820Sjeff dst->qkey = src->qkey; 225219820Sjeff} 226219820Sjeff 227219820Sjeffstatic void ucma_set_event_context(struct ucma_context *ctx, 228219820Sjeff struct rdma_cm_event *event, 229219820Sjeff struct ucma_event *uevent) 230219820Sjeff{ 231219820Sjeff uevent->ctx = ctx; 232219820Sjeff switch (event->event) { 233219820Sjeff case RDMA_CM_EVENT_MULTICAST_JOIN: 234219820Sjeff case RDMA_CM_EVENT_MULTICAST_ERROR: 235219820Sjeff uevent->mc = (struct ucma_multicast *) 236219820Sjeff event->param.ud.private_data; 237219820Sjeff uevent->resp.uid = uevent->mc->uid; 238219820Sjeff uevent->resp.id = uevent->mc->id; 239219820Sjeff break; 240219820Sjeff default: 241219820Sjeff uevent->resp.uid = ctx->uid; 242219820Sjeff uevent->resp.id = ctx->id; 243219820Sjeff break; 244219820Sjeff } 245219820Sjeff} 246219820Sjeff 247219820Sjeffstatic int ucma_event_handler(struct rdma_cm_id *cm_id, 248219820Sjeff struct rdma_cm_event *event) 249219820Sjeff{ 250219820Sjeff struct ucma_event *uevent; 251219820Sjeff struct ucma_context *ctx = cm_id->context; 252219820Sjeff int ret = 0; 253219820Sjeff 254219820Sjeff uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); 255219820Sjeff if (!uevent) 256219820Sjeff return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; 257219820Sjeff 258219820Sjeff uevent->cm_id = cm_id; 259219820Sjeff ucma_set_event_context(ctx, event, uevent); 260219820Sjeff uevent->resp.event = event->event; 261219820Sjeff uevent->resp.status = event->status; 262219820Sjeff if (cm_id->ps == RDMA_PS_UDP || cm_id->ps == RDMA_PS_IPOIB) 263219820Sjeff ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud); 264219820Sjeff else 265219820Sjeff ucma_copy_conn_event(&uevent->resp.param.conn, 266219820Sjeff &event->param.conn); 267219820Sjeff 268219820Sjeff mutex_lock(&ctx->file->mut); 269219820Sjeff if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { 270219820Sjeff if (!ctx->backlog) { 271219820Sjeff ret = -ENOMEM; 272219820Sjeff kfree(uevent); 273219820Sjeff goto out; 274219820Sjeff } 275219820Sjeff ctx->backlog--; 276219820Sjeff } else if (!ctx->uid) { 277219820Sjeff /* 278219820Sjeff * We ignore events for new connections until userspace has set 279219820Sjeff * their context. This can only happen if an error occurs on a 280219820Sjeff * new connection before the user accepts it. This is okay, 281219820Sjeff * since the accept will just fail later. 282219820Sjeff */ 283219820Sjeff kfree(uevent); 284219820Sjeff goto out; 285219820Sjeff } 286219820Sjeff 287219820Sjeff list_add_tail(&uevent->list, &ctx->file->event_list); 288219820Sjeff wake_up_interruptible(&ctx->file->poll_wait); 289219820Sjeff if (ctx->file->filp) 290219820Sjeff selwakeup(&ctx->file->filp->f_selinfo); 291219820Sjeffout: 292219820Sjeff mutex_unlock(&ctx->file->mut); 293219820Sjeff return ret; 294219820Sjeff} 295219820Sjeff 296219820Sjeffstatic ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, 297219820Sjeff int in_len, int out_len) 298219820Sjeff{ 299219820Sjeff struct ucma_context *ctx; 300219820Sjeff struct rdma_ucm_get_event cmd; 301219820Sjeff struct ucma_event *uevent; 302219820Sjeff int ret = 0; 303219820Sjeff DEFINE_WAIT(wait); 304219820Sjeff 305219820Sjeff if (out_len < sizeof uevent->resp) 306219820Sjeff return -ENOSPC; 307219820Sjeff 308219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 309219820Sjeff return -EFAULT; 310219820Sjeff 311219820Sjeff mutex_lock(&file->mut); 312219820Sjeff while (list_empty(&file->event_list)) { 313219820Sjeff mutex_unlock(&file->mut); 314219820Sjeff 315219820Sjeff if (file->filp->f_flags & O_NONBLOCK) 316219820Sjeff return -EAGAIN; 317219820Sjeff 318219820Sjeff if (wait_event_interruptible(file->poll_wait, 319219820Sjeff !list_empty(&file->event_list))) 320219820Sjeff return -ERESTARTSYS; 321219820Sjeff 322219820Sjeff mutex_lock(&file->mut); 323219820Sjeff } 324219820Sjeff 325219820Sjeff uevent = list_entry(file->event_list.next, struct ucma_event, list); 326219820Sjeff 327219820Sjeff if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { 328219820Sjeff ctx = ucma_alloc_ctx(file); 329219820Sjeff if (!ctx) { 330219820Sjeff ret = -ENOMEM; 331219820Sjeff goto done; 332219820Sjeff } 333219820Sjeff uevent->ctx->backlog++; 334219820Sjeff ctx->cm_id = uevent->cm_id; 335219820Sjeff ctx->cm_id->context = ctx; 336219820Sjeff uevent->resp.id = ctx->id; 337219820Sjeff } 338219820Sjeff 339219820Sjeff if (copy_to_user((void __user *)(unsigned long)cmd.response, 340219820Sjeff &uevent->resp, sizeof uevent->resp)) { 341219820Sjeff ret = -EFAULT; 342219820Sjeff goto done; 343219820Sjeff } 344219820Sjeff 345219820Sjeff list_del(&uevent->list); 346219820Sjeff uevent->ctx->events_reported++; 347219820Sjeff if (uevent->mc) 348219820Sjeff uevent->mc->events_reported++; 349219820Sjeff kfree(uevent); 350219820Sjeffdone: 351219820Sjeff mutex_unlock(&file->mut); 352219820Sjeff return ret; 353219820Sjeff} 354219820Sjeff 355219820Sjeffstatic ssize_t ucma_create_id(struct ucma_file *file, 356219820Sjeff const char __user *inbuf, 357219820Sjeff int in_len, int out_len) 358219820Sjeff{ 359219820Sjeff struct rdma_ucm_create_id cmd; 360219820Sjeff struct rdma_ucm_create_id_resp resp; 361219820Sjeff struct ucma_context *ctx; 362219820Sjeff int ret; 363219820Sjeff 364219820Sjeff if (out_len < sizeof(resp)) 365219820Sjeff return -ENOSPC; 366219820Sjeff 367219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 368219820Sjeff return -EFAULT; 369219820Sjeff 370219820Sjeff mutex_lock(&file->mut); 371219820Sjeff ctx = ucma_alloc_ctx(file); 372219820Sjeff mutex_unlock(&file->mut); 373219820Sjeff if (!ctx) 374219820Sjeff return -ENOMEM; 375219820Sjeff 376219820Sjeff ctx->uid = cmd.uid; 377219820Sjeff ctx->cm_id = rdma_create_id(ucma_event_handler, ctx, cmd.ps); 378219820Sjeff if (IS_ERR(ctx->cm_id)) { 379219820Sjeff ret = PTR_ERR(ctx->cm_id); 380219820Sjeff goto err1; 381219820Sjeff } 382219820Sjeff 383219820Sjeff resp.id = ctx->id; 384219820Sjeff if (copy_to_user((void __user *)(unsigned long)cmd.response, 385219820Sjeff &resp, sizeof(resp))) { 386219820Sjeff ret = -EFAULT; 387219820Sjeff goto err2; 388219820Sjeff } 389219820Sjeff return 0; 390219820Sjeff 391219820Sjefferr2: 392219820Sjeff rdma_destroy_id(ctx->cm_id); 393219820Sjefferr1: 394219820Sjeff mutex_lock(&mut); 395219820Sjeff idr_remove(&ctx_idr, ctx->id); 396219820Sjeff mutex_unlock(&mut); 397219820Sjeff kfree(ctx); 398219820Sjeff return ret; 399219820Sjeff} 400219820Sjeff 401219820Sjeffstatic void ucma_cleanup_multicast(struct ucma_context *ctx) 402219820Sjeff{ 403219820Sjeff struct ucma_multicast *mc, *tmp; 404219820Sjeff 405219820Sjeff mutex_lock(&mut); 406219820Sjeff list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { 407219820Sjeff list_del(&mc->list); 408219820Sjeff idr_remove(&multicast_idr, mc->id); 409219820Sjeff kfree(mc); 410219820Sjeff } 411219820Sjeff mutex_unlock(&mut); 412219820Sjeff} 413219820Sjeff 414219820Sjeffstatic void ucma_cleanup_events(struct ucma_context *ctx) 415219820Sjeff{ 416219820Sjeff struct ucma_event *uevent, *tmp; 417219820Sjeff 418219820Sjeff list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { 419219820Sjeff if (uevent->ctx != ctx) 420219820Sjeff continue; 421219820Sjeff 422219820Sjeff list_del(&uevent->list); 423219820Sjeff 424219820Sjeff /* clear incoming connections. */ 425219820Sjeff if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) 426219820Sjeff rdma_destroy_id(uevent->cm_id); 427219820Sjeff 428219820Sjeff kfree(uevent); 429219820Sjeff } 430219820Sjeff} 431219820Sjeff 432219820Sjeffstatic void ucma_cleanup_mc_events(struct ucma_multicast *mc) 433219820Sjeff{ 434219820Sjeff struct ucma_event *uevent, *tmp; 435219820Sjeff 436219820Sjeff list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { 437219820Sjeff if (uevent->mc != mc) 438219820Sjeff continue; 439219820Sjeff 440219820Sjeff list_del(&uevent->list); 441219820Sjeff kfree(uevent); 442219820Sjeff } 443219820Sjeff} 444219820Sjeff 445219820Sjeffstatic int ucma_free_ctx(struct ucma_context *ctx) 446219820Sjeff{ 447219820Sjeff int events_reported; 448219820Sjeff 449219820Sjeff /* No new events will be generated after destroying the id. */ 450219820Sjeff rdma_destroy_id(ctx->cm_id); 451219820Sjeff 452219820Sjeff ucma_cleanup_multicast(ctx); 453219820Sjeff 454219820Sjeff /* Cleanup events not yet reported to the user. */ 455219820Sjeff mutex_lock(&ctx->file->mut); 456219820Sjeff ucma_cleanup_events(ctx); 457219820Sjeff list_del(&ctx->list); 458219820Sjeff mutex_unlock(&ctx->file->mut); 459219820Sjeff 460219820Sjeff events_reported = ctx->events_reported; 461219820Sjeff kfree(ctx); 462219820Sjeff return events_reported; 463219820Sjeff} 464219820Sjeff 465219820Sjeffstatic ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, 466219820Sjeff int in_len, int out_len) 467219820Sjeff{ 468219820Sjeff struct rdma_ucm_destroy_id cmd; 469219820Sjeff struct rdma_ucm_destroy_id_resp resp; 470219820Sjeff struct ucma_context *ctx; 471219820Sjeff int ret = 0; 472219820Sjeff 473219820Sjeff if (out_len < sizeof(resp)) 474219820Sjeff return -ENOSPC; 475219820Sjeff 476219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 477219820Sjeff return -EFAULT; 478219820Sjeff 479219820Sjeff mutex_lock(&mut); 480219820Sjeff ctx = _ucma_find_context(cmd.id, file); 481219820Sjeff if (!IS_ERR(ctx)) 482219820Sjeff idr_remove(&ctx_idr, ctx->id); 483219820Sjeff mutex_unlock(&mut); 484219820Sjeff 485219820Sjeff if (IS_ERR(ctx)) 486219820Sjeff return PTR_ERR(ctx); 487219820Sjeff 488219820Sjeff ucma_put_ctx(ctx); 489219820Sjeff wait_for_completion(&ctx->comp); 490219820Sjeff resp.events_reported = ucma_free_ctx(ctx); 491219820Sjeff 492219820Sjeff if (copy_to_user((void __user *)(unsigned long)cmd.response, 493219820Sjeff &resp, sizeof(resp))) 494219820Sjeff ret = -EFAULT; 495219820Sjeff 496219820Sjeff return ret; 497219820Sjeff} 498219820Sjeff 499219820Sjeffstatic ssize_t ucma_bind_addr(struct ucma_file *file, const char __user *inbuf, 500219820Sjeff int in_len, int out_len) 501219820Sjeff{ 502219820Sjeff struct rdma_ucm_bind_addr cmd; 503219820Sjeff struct ucma_context *ctx; 504219820Sjeff int ret; 505219820Sjeff 506219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 507219820Sjeff return -EFAULT; 508219820Sjeff 509219820Sjeff ctx = ucma_get_ctx(file, cmd.id); 510219820Sjeff if (IS_ERR(ctx)) 511219820Sjeff return PTR_ERR(ctx); 512219820Sjeff 513219820Sjeff ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); 514219820Sjeff ucma_put_ctx(ctx); 515219820Sjeff return ret; 516219820Sjeff} 517219820Sjeff 518219820Sjeffstatic ssize_t ucma_resolve_addr(struct ucma_file *file, 519219820Sjeff const char __user *inbuf, 520219820Sjeff int in_len, int out_len) 521219820Sjeff{ 522219820Sjeff struct rdma_ucm_resolve_addr cmd; 523219820Sjeff struct ucma_context *ctx; 524219820Sjeff int ret; 525219820Sjeff 526219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 527219820Sjeff return -EFAULT; 528219820Sjeff 529219820Sjeff ctx = ucma_get_ctx(file, cmd.id); 530219820Sjeff if (IS_ERR(ctx)) 531219820Sjeff return PTR_ERR(ctx); 532219820Sjeff 533219820Sjeff ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, 534219820Sjeff (struct sockaddr *) &cmd.dst_addr, 535219820Sjeff cmd.timeout_ms); 536219820Sjeff ucma_put_ctx(ctx); 537219820Sjeff return ret; 538219820Sjeff} 539219820Sjeff 540219820Sjeffstatic ssize_t ucma_resolve_route(struct ucma_file *file, 541219820Sjeff const char __user *inbuf, 542219820Sjeff int in_len, int out_len) 543219820Sjeff{ 544219820Sjeff struct rdma_ucm_resolve_route cmd; 545219820Sjeff struct ucma_context *ctx; 546219820Sjeff int ret; 547219820Sjeff 548219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 549219820Sjeff return -EFAULT; 550219820Sjeff 551219820Sjeff ctx = ucma_get_ctx(file, cmd.id); 552219820Sjeff if (IS_ERR(ctx)) 553219820Sjeff return PTR_ERR(ctx); 554219820Sjeff 555219820Sjeff ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); 556219820Sjeff ucma_put_ctx(ctx); 557219820Sjeff return ret; 558219820Sjeff} 559219820Sjeff 560219820Sjeffstatic void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, 561219820Sjeff struct rdma_route *route) 562219820Sjeff{ 563219820Sjeff struct rdma_dev_addr *dev_addr; 564219820Sjeff 565219820Sjeff resp->num_paths = route->num_paths; 566219820Sjeff switch (route->num_paths) { 567219820Sjeff case 0: 568219820Sjeff dev_addr = &route->addr.dev_addr; 569219820Sjeff rdma_addr_get_dgid(dev_addr, 570219820Sjeff (union ib_gid *) &resp->ib_route[0].dgid); 571219820Sjeff rdma_addr_get_sgid(dev_addr, 572219820Sjeff (union ib_gid *) &resp->ib_route[0].sgid); 573219820Sjeff resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 574219820Sjeff break; 575219820Sjeff case 2: 576219820Sjeff ib_copy_path_rec_to_user(&resp->ib_route[1], 577219820Sjeff &route->path_rec[1]); 578219820Sjeff /* fall through */ 579219820Sjeff case 1: 580219820Sjeff ib_copy_path_rec_to_user(&resp->ib_route[0], 581219820Sjeff &route->path_rec[0]); 582219820Sjeff break; 583219820Sjeff default: 584219820Sjeff break; 585219820Sjeff } 586219820Sjeff} 587219820Sjeff 588219820Sjeffstatic void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, 589219820Sjeff struct rdma_route *route) 590219820Sjeff{ 591219820Sjeff struct rdma_dev_addr *dev_addr; 592219820Sjeff struct net_device *dev; 593219820Sjeff u16 vid = 0; 594219820Sjeff 595219820Sjeff resp->num_paths = route->num_paths; 596219820Sjeff switch (route->num_paths) { 597219820Sjeff case 0: 598219820Sjeff dev_addr = &route->addr.dev_addr; 599219820Sjeff dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 600219820Sjeff if (dev) { 601219820Sjeff vid = rdma_vlan_dev_vlan_id(dev); 602219820Sjeff dev_put(dev); 603219820Sjeff } 604219820Sjeff 605219820Sjeff iboe_mac_vlan_to_ll((union ib_gid *) &resp->ib_route[0].dgid, 606219820Sjeff dev_addr->dst_dev_addr, vid); 607219820Sjeff iboe_addr_get_sgid(dev_addr, 608219820Sjeff (union ib_gid *) &resp->ib_route[0].sgid); 609219820Sjeff resp->ib_route[0].pkey = cpu_to_be16(0xffff); 610219820Sjeff break; 611219820Sjeff case 2: 612219820Sjeff ib_copy_path_rec_to_user(&resp->ib_route[1], 613219820Sjeff &route->path_rec[1]); 614219820Sjeff /* fall through */ 615219820Sjeff case 1: 616219820Sjeff ib_copy_path_rec_to_user(&resp->ib_route[0], 617219820Sjeff &route->path_rec[0]); 618219820Sjeff break; 619219820Sjeff default: 620219820Sjeff break; 621219820Sjeff } 622219820Sjeff} 623219820Sjeff 624219820Sjeffstatic ssize_t ucma_query_route(struct ucma_file *file, 625219820Sjeff const char __user *inbuf, 626219820Sjeff int in_len, int out_len) 627219820Sjeff{ 628219820Sjeff struct rdma_ucm_query_route cmd; 629219820Sjeff struct rdma_ucm_query_route_resp resp; 630219820Sjeff struct ucma_context *ctx; 631219820Sjeff struct sockaddr *addr; 632219820Sjeff int ret = 0; 633219820Sjeff 634219820Sjeff if (out_len < sizeof(resp)) 635219820Sjeff return -ENOSPC; 636219820Sjeff 637219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 638219820Sjeff return -EFAULT; 639219820Sjeff 640219820Sjeff ctx = ucma_get_ctx(file, cmd.id); 641219820Sjeff if (IS_ERR(ctx)) 642219820Sjeff return PTR_ERR(ctx); 643219820Sjeff 644219820Sjeff memset(&resp, 0, sizeof resp); 645219820Sjeff addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; 646219820Sjeff memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? 647219820Sjeff sizeof(struct sockaddr_in) : 648219820Sjeff sizeof(struct sockaddr_in6)); 649219820Sjeff addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; 650219820Sjeff memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? 651219820Sjeff sizeof(struct sockaddr_in) : 652219820Sjeff sizeof(struct sockaddr_in6)); 653219820Sjeff if (!ctx->cm_id->device) 654219820Sjeff goto out; 655219820Sjeff 656219820Sjeff resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; 657219820Sjeff resp.port_num = ctx->cm_id->port_num; 658219820Sjeff if (rdma_node_get_transport(ctx->cm_id->device->node_type) == RDMA_TRANSPORT_IB) { 659219820Sjeff switch (rdma_port_get_link_layer(ctx->cm_id->device, ctx->cm_id->port_num)) { 660219820Sjeff case IB_LINK_LAYER_INFINIBAND: 661219820Sjeff ucma_copy_ib_route(&resp, &ctx->cm_id->route); 662219820Sjeff break; 663219820Sjeff case IB_LINK_LAYER_ETHERNET: 664219820Sjeff ucma_copy_iboe_route(&resp, &ctx->cm_id->route); 665219820Sjeff break; 666219820Sjeff default: 667219820Sjeff break; 668219820Sjeff } 669219820Sjeff } 670219820Sjeff 671219820Sjeffout: 672219820Sjeff if (copy_to_user((void __user *)(unsigned long)cmd.response, 673219820Sjeff &resp, sizeof(resp))) 674219820Sjeff ret = -EFAULT; 675219820Sjeff 676219820Sjeff ucma_put_ctx(ctx); 677219820Sjeff return ret; 678219820Sjeff} 679219820Sjeff 680219820Sjeffstatic void ucma_copy_conn_param(struct rdma_conn_param *dst, 681219820Sjeff struct rdma_ucm_conn_param *src) 682219820Sjeff{ 683219820Sjeff dst->private_data = src->private_data; 684219820Sjeff dst->private_data_len = src->private_data_len; 685219820Sjeff dst->responder_resources =src->responder_resources; 686219820Sjeff dst->initiator_depth = src->initiator_depth; 687219820Sjeff dst->flow_control = src->flow_control; 688219820Sjeff dst->retry_count = src->retry_count; 689219820Sjeff dst->rnr_retry_count = src->rnr_retry_count; 690219820Sjeff dst->srq = src->srq; 691219820Sjeff dst->qp_num = src->qp_num; 692219820Sjeff} 693219820Sjeff 694219820Sjeffstatic ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, 695219820Sjeff int in_len, int out_len) 696219820Sjeff{ 697219820Sjeff struct rdma_ucm_connect cmd; 698219820Sjeff struct rdma_conn_param conn_param; 699219820Sjeff struct ucma_context *ctx; 700219820Sjeff int ret; 701219820Sjeff 702219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 703219820Sjeff return -EFAULT; 704219820Sjeff 705219820Sjeff if (!cmd.conn_param.valid) 706219820Sjeff return -EINVAL; 707219820Sjeff 708219820Sjeff ctx = ucma_get_ctx(file, cmd.id); 709219820Sjeff if (IS_ERR(ctx)) 710219820Sjeff return PTR_ERR(ctx); 711219820Sjeff 712219820Sjeff ucma_copy_conn_param(&conn_param, &cmd.conn_param); 713219820Sjeff ret = rdma_connect(ctx->cm_id, &conn_param); 714219820Sjeff ucma_put_ctx(ctx); 715219820Sjeff return ret; 716219820Sjeff} 717219820Sjeff 718219820Sjeffstatic ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, 719219820Sjeff int in_len, int out_len) 720219820Sjeff{ 721219820Sjeff struct rdma_ucm_listen cmd; 722219820Sjeff struct ucma_context *ctx; 723219820Sjeff int ret; 724219820Sjeff 725219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 726219820Sjeff return -EFAULT; 727219820Sjeff 728219820Sjeff ctx = ucma_get_ctx(file, cmd.id); 729219820Sjeff if (IS_ERR(ctx)) 730219820Sjeff return PTR_ERR(ctx); 731219820Sjeff 732219820Sjeff ctx->backlog = cmd.backlog > 0 && cmd.backlog < UCMA_MAX_BACKLOG ? 733219820Sjeff cmd.backlog : UCMA_MAX_BACKLOG; 734219820Sjeff ret = rdma_listen(ctx->cm_id, ctx->backlog); 735219820Sjeff ucma_put_ctx(ctx); 736219820Sjeff return ret; 737219820Sjeff} 738219820Sjeff 739219820Sjeffstatic ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, 740219820Sjeff int in_len, int out_len) 741219820Sjeff{ 742219820Sjeff struct rdma_ucm_accept cmd; 743219820Sjeff struct rdma_conn_param conn_param; 744219820Sjeff struct ucma_context *ctx; 745219820Sjeff int ret; 746219820Sjeff 747219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 748219820Sjeff return -EFAULT; 749219820Sjeff 750219820Sjeff ctx = ucma_get_ctx(file, cmd.id); 751219820Sjeff if (IS_ERR(ctx)) 752219820Sjeff return PTR_ERR(ctx); 753219820Sjeff 754219820Sjeff if (cmd.conn_param.valid) { 755219820Sjeff ctx->uid = cmd.uid; 756219820Sjeff ucma_copy_conn_param(&conn_param, &cmd.conn_param); 757219820Sjeff ret = rdma_accept(ctx->cm_id, &conn_param); 758219820Sjeff } else 759219820Sjeff ret = rdma_accept(ctx->cm_id, NULL); 760219820Sjeff 761219820Sjeff ucma_put_ctx(ctx); 762219820Sjeff return ret; 763219820Sjeff} 764219820Sjeff 765219820Sjeffstatic ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, 766219820Sjeff int in_len, int out_len) 767219820Sjeff{ 768219820Sjeff struct rdma_ucm_reject cmd; 769219820Sjeff struct ucma_context *ctx; 770219820Sjeff int ret; 771219820Sjeff 772219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 773219820Sjeff return -EFAULT; 774219820Sjeff 775219820Sjeff ctx = ucma_get_ctx(file, cmd.id); 776219820Sjeff if (IS_ERR(ctx)) 777219820Sjeff return PTR_ERR(ctx); 778219820Sjeff 779219820Sjeff ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len); 780219820Sjeff ucma_put_ctx(ctx); 781219820Sjeff return ret; 782219820Sjeff} 783219820Sjeff 784219820Sjeffstatic ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, 785219820Sjeff int in_len, int out_len) 786219820Sjeff{ 787219820Sjeff struct rdma_ucm_disconnect cmd; 788219820Sjeff struct ucma_context *ctx; 789219820Sjeff int ret; 790219820Sjeff 791219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 792219820Sjeff return -EFAULT; 793219820Sjeff 794219820Sjeff ctx = ucma_get_ctx(file, cmd.id); 795219820Sjeff if (IS_ERR(ctx)) 796219820Sjeff return PTR_ERR(ctx); 797219820Sjeff 798219820Sjeff ret = rdma_disconnect(ctx->cm_id); 799219820Sjeff ucma_put_ctx(ctx); 800219820Sjeff return ret; 801219820Sjeff} 802219820Sjeff 803219820Sjeffstatic ssize_t ucma_init_qp_attr(struct ucma_file *file, 804219820Sjeff const char __user *inbuf, 805219820Sjeff int in_len, int out_len) 806219820Sjeff{ 807219820Sjeff struct rdma_ucm_init_qp_attr cmd; 808219820Sjeff struct ib_uverbs_qp_attr resp; 809219820Sjeff struct ucma_context *ctx; 810219820Sjeff struct ib_qp_attr qp_attr; 811219820Sjeff int ret; 812219820Sjeff 813219820Sjeff if (out_len < sizeof(resp)) 814219820Sjeff return -ENOSPC; 815219820Sjeff 816219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 817219820Sjeff return -EFAULT; 818219820Sjeff 819219820Sjeff ctx = ucma_get_ctx(file, cmd.id); 820219820Sjeff if (IS_ERR(ctx)) 821219820Sjeff return PTR_ERR(ctx); 822219820Sjeff 823219820Sjeff resp.qp_attr_mask = 0; 824219820Sjeff memset(&qp_attr, 0, sizeof qp_attr); 825219820Sjeff qp_attr.qp_state = cmd.qp_state; 826219820Sjeff ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); 827219820Sjeff if (ret) 828219820Sjeff goto out; 829219820Sjeff 830219820Sjeff ib_copy_qp_attr_to_user(&resp, &qp_attr); 831219820Sjeff if (copy_to_user((void __user *)(unsigned long)cmd.response, 832219820Sjeff &resp, sizeof(resp))) 833219820Sjeff ret = -EFAULT; 834219820Sjeff 835219820Sjeffout: 836219820Sjeff ucma_put_ctx(ctx); 837219820Sjeff return ret; 838219820Sjeff} 839219820Sjeff 840219820Sjeffstatic int ucma_set_option_id(struct ucma_context *ctx, int optname, 841219820Sjeff void *optval, size_t optlen) 842219820Sjeff{ 843219820Sjeff int ret = 0; 844219820Sjeff 845219820Sjeff switch (optname) { 846219820Sjeff case RDMA_OPTION_ID_TOS: 847219820Sjeff if (optlen != sizeof(u8)) { 848219820Sjeff ret = -EINVAL; 849219820Sjeff break; 850219820Sjeff } 851219820Sjeff rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); 852219820Sjeff break; 853219820Sjeff default: 854219820Sjeff ret = -ENOSYS; 855219820Sjeff } 856219820Sjeff 857219820Sjeff return ret; 858219820Sjeff} 859219820Sjeff 860219820Sjeffstatic int ucma_set_ib_path(struct ucma_context *ctx, 861219820Sjeff struct ib_path_rec_data *path_data, size_t optlen) 862219820Sjeff{ 863219820Sjeff struct ib_sa_path_rec sa_path; 864219820Sjeff struct rdma_cm_event event; 865219820Sjeff int ret; 866219820Sjeff 867219820Sjeff if (optlen % sizeof(*path_data)) 868219820Sjeff return -EINVAL; 869219820Sjeff 870219820Sjeff for (; optlen; optlen -= sizeof(*path_data), path_data++) { 871219820Sjeff if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | 872219820Sjeff IB_PATH_BIDIRECTIONAL)) 873219820Sjeff break; 874219820Sjeff } 875219820Sjeff 876219820Sjeff if (!optlen) 877219820Sjeff return -EINVAL; 878219820Sjeff 879219820Sjeff ib_sa_unpack_path(path_data->path_rec, &sa_path); 880219820Sjeff ret = rdma_set_ib_paths(ctx->cm_id, &sa_path, 1); 881219820Sjeff if (ret) 882219820Sjeff return ret; 883219820Sjeff 884219820Sjeff memset(&event, 0, sizeof event); 885219820Sjeff event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 886219820Sjeff return ucma_event_handler(ctx->cm_id, &event); 887219820Sjeff} 888219820Sjeff 889219820Sjeffstatic int ucma_set_option_ib(struct ucma_context *ctx, int optname, 890219820Sjeff void *optval, size_t optlen) 891219820Sjeff{ 892219820Sjeff int ret; 893219820Sjeff 894219820Sjeff switch (optname) { 895219820Sjeff case RDMA_OPTION_IB_PATH: 896219820Sjeff ret = ucma_set_ib_path(ctx, optval, optlen); 897219820Sjeff break; 898219820Sjeff default: 899219820Sjeff ret = -ENOSYS; 900219820Sjeff } 901219820Sjeff 902219820Sjeff return ret; 903219820Sjeff} 904219820Sjeff 905219820Sjeffstatic int ucma_set_option_level(struct ucma_context *ctx, int level, 906219820Sjeff int optname, void *optval, size_t optlen) 907219820Sjeff{ 908219820Sjeff int ret; 909219820Sjeff 910219820Sjeff switch (level) { 911219820Sjeff case RDMA_OPTION_ID: 912219820Sjeff ret = ucma_set_option_id(ctx, optname, optval, optlen); 913219820Sjeff break; 914219820Sjeff case RDMA_OPTION_IB: 915219820Sjeff ret = ucma_set_option_ib(ctx, optname, optval, optlen); 916219820Sjeff break; 917219820Sjeff default: 918219820Sjeff ret = -ENOSYS; 919219820Sjeff } 920219820Sjeff 921219820Sjeff return ret; 922219820Sjeff} 923219820Sjeff 924219820Sjeffstatic ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, 925219820Sjeff int in_len, int out_len) 926219820Sjeff{ 927219820Sjeff struct rdma_ucm_set_option cmd; 928219820Sjeff struct ucma_context *ctx; 929219820Sjeff void *optval; 930219820Sjeff int ret; 931219820Sjeff 932219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 933219820Sjeff return -EFAULT; 934219820Sjeff 935219820Sjeff ctx = ucma_get_ctx(file, cmd.id); 936219820Sjeff if (IS_ERR(ctx)) 937219820Sjeff return PTR_ERR(ctx); 938219820Sjeff 939219820Sjeff optval = kmalloc(cmd.optlen, GFP_KERNEL); 940219820Sjeff if (!optval) { 941219820Sjeff ret = -ENOMEM; 942219820Sjeff goto out1; 943219820Sjeff } 944219820Sjeff 945219820Sjeff if (copy_from_user(optval, (void __user *) (unsigned long) cmd.optval, 946219820Sjeff cmd.optlen)) { 947219820Sjeff ret = -EFAULT; 948219820Sjeff goto out2; 949219820Sjeff } 950219820Sjeff 951219820Sjeff ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, 952219820Sjeff cmd.optlen); 953219820Sjeffout2: 954219820Sjeff kfree(optval); 955219820Sjeffout1: 956219820Sjeff ucma_put_ctx(ctx); 957219820Sjeff return ret; 958219820Sjeff} 959219820Sjeff 960219820Sjeffstatic ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, 961219820Sjeff int in_len, int out_len) 962219820Sjeff{ 963219820Sjeff struct rdma_ucm_notify cmd; 964219820Sjeff struct ucma_context *ctx; 965219820Sjeff int ret; 966219820Sjeff 967219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 968219820Sjeff return -EFAULT; 969219820Sjeff 970219820Sjeff ctx = ucma_get_ctx(file, cmd.id); 971219820Sjeff if (IS_ERR(ctx)) 972219820Sjeff return PTR_ERR(ctx); 973219820Sjeff 974219820Sjeff ret = rdma_notify(ctx->cm_id, (enum ib_event_type) cmd.event); 975219820Sjeff ucma_put_ctx(ctx); 976219820Sjeff return ret; 977219820Sjeff} 978219820Sjeff 979219820Sjeffstatic ssize_t ucma_join_multicast(struct ucma_file *file, 980219820Sjeff const char __user *inbuf, 981219820Sjeff int in_len, int out_len) 982219820Sjeff{ 983219820Sjeff struct rdma_ucm_join_mcast cmd; 984219820Sjeff struct rdma_ucm_create_id_resp resp; 985219820Sjeff struct ucma_context *ctx; 986219820Sjeff struct ucma_multicast *mc; 987219820Sjeff int ret; 988219820Sjeff 989219820Sjeff if (out_len < sizeof(resp)) 990219820Sjeff return -ENOSPC; 991219820Sjeff 992219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 993219820Sjeff return -EFAULT; 994219820Sjeff 995219820Sjeff ctx = ucma_get_ctx(file, cmd.id); 996219820Sjeff if (IS_ERR(ctx)) 997219820Sjeff return PTR_ERR(ctx); 998219820Sjeff 999219820Sjeff mutex_lock(&file->mut); 1000219820Sjeff mc = ucma_alloc_multicast(ctx); 1001219820Sjeff if (!mc) { 1002219820Sjeff ret = -ENOMEM; 1003219820Sjeff goto err1; 1004219820Sjeff } 1005219820Sjeff 1006219820Sjeff mc->uid = cmd.uid; 1007219820Sjeff memcpy(&mc->addr, &cmd.addr, sizeof cmd.addr); 1008219820Sjeff ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr, mc); 1009219820Sjeff if (ret) 1010219820Sjeff goto err2; 1011219820Sjeff 1012219820Sjeff resp.id = mc->id; 1013219820Sjeff if (copy_to_user((void __user *)(unsigned long)cmd.response, 1014219820Sjeff &resp, sizeof(resp))) { 1015219820Sjeff ret = -EFAULT; 1016219820Sjeff goto err3; 1017219820Sjeff } 1018219820Sjeff 1019219820Sjeff mutex_unlock(&file->mut); 1020219820Sjeff ucma_put_ctx(ctx); 1021219820Sjeff return 0; 1022219820Sjeff 1023219820Sjefferr3: 1024219820Sjeff rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); 1025219820Sjeff ucma_cleanup_mc_events(mc); 1026219820Sjefferr2: 1027219820Sjeff mutex_lock(&mut); 1028219820Sjeff idr_remove(&multicast_idr, mc->id); 1029219820Sjeff mutex_unlock(&mut); 1030219820Sjeff list_del(&mc->list); 1031219820Sjeff kfree(mc); 1032219820Sjefferr1: 1033219820Sjeff mutex_unlock(&file->mut); 1034219820Sjeff ucma_put_ctx(ctx); 1035219820Sjeff return ret; 1036219820Sjeff} 1037219820Sjeff 1038219820Sjeffstatic ssize_t ucma_leave_multicast(struct ucma_file *file, 1039219820Sjeff const char __user *inbuf, 1040219820Sjeff int in_len, int out_len) 1041219820Sjeff{ 1042219820Sjeff struct rdma_ucm_destroy_id cmd; 1043219820Sjeff struct rdma_ucm_destroy_id_resp resp; 1044219820Sjeff struct ucma_multicast *mc; 1045219820Sjeff int ret = 0; 1046219820Sjeff 1047219820Sjeff if (out_len < sizeof(resp)) 1048219820Sjeff return -ENOSPC; 1049219820Sjeff 1050219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 1051219820Sjeff return -EFAULT; 1052219820Sjeff 1053219820Sjeff mutex_lock(&mut); 1054219820Sjeff mc = idr_find(&multicast_idr, cmd.id); 1055219820Sjeff if (!mc) 1056219820Sjeff mc = ERR_PTR(-ENOENT); 1057219820Sjeff else if (mc->ctx->file != file) 1058219820Sjeff mc = ERR_PTR(-EINVAL); 1059219820Sjeff else { 1060219820Sjeff idr_remove(&multicast_idr, mc->id); 1061219820Sjeff atomic_inc(&mc->ctx->ref); 1062219820Sjeff } 1063219820Sjeff mutex_unlock(&mut); 1064219820Sjeff 1065219820Sjeff if (IS_ERR(mc)) { 1066219820Sjeff ret = PTR_ERR(mc); 1067219820Sjeff goto out; 1068219820Sjeff } 1069219820Sjeff 1070219820Sjeff rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); 1071219820Sjeff mutex_lock(&mc->ctx->file->mut); 1072219820Sjeff ucma_cleanup_mc_events(mc); 1073219820Sjeff list_del(&mc->list); 1074219820Sjeff mutex_unlock(&mc->ctx->file->mut); 1075219820Sjeff 1076219820Sjeff ucma_put_ctx(mc->ctx); 1077219820Sjeff resp.events_reported = mc->events_reported; 1078219820Sjeff kfree(mc); 1079219820Sjeff 1080219820Sjeff if (copy_to_user((void __user *)(unsigned long)cmd.response, 1081219820Sjeff &resp, sizeof(resp))) 1082219820Sjeff ret = -EFAULT; 1083219820Sjeffout: 1084219820Sjeff return ret; 1085219820Sjeff} 1086219820Sjeff 1087219820Sjeffstatic void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) 1088219820Sjeff{ 1089219820Sjeff /* Acquire mutex's based on pointer comparison to prevent deadlock. */ 1090219820Sjeff if (file1 < file2) { 1091219820Sjeff mutex_lock(&file1->mut); 1092219820Sjeff mutex_lock(&file2->mut); 1093219820Sjeff } else { 1094219820Sjeff mutex_lock(&file2->mut); 1095219820Sjeff mutex_lock(&file1->mut); 1096219820Sjeff } 1097219820Sjeff} 1098219820Sjeff 1099219820Sjeffstatic void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) 1100219820Sjeff{ 1101219820Sjeff if (file1 < file2) { 1102219820Sjeff mutex_unlock(&file2->mut); 1103219820Sjeff mutex_unlock(&file1->mut); 1104219820Sjeff } else { 1105219820Sjeff mutex_unlock(&file1->mut); 1106219820Sjeff mutex_unlock(&file2->mut); 1107219820Sjeff } 1108219820Sjeff} 1109219820Sjeff 1110219820Sjeffstatic void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) 1111219820Sjeff{ 1112219820Sjeff struct ucma_event *uevent, *tmp; 1113219820Sjeff 1114219820Sjeff list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) 1115219820Sjeff if (uevent->ctx == ctx) 1116219820Sjeff list_move_tail(&uevent->list, &file->event_list); 1117219820Sjeff} 1118219820Sjeff 1119219820Sjeffstatic ssize_t ucma_migrate_id(struct ucma_file *new_file, 1120219820Sjeff const char __user *inbuf, 1121219820Sjeff int in_len, int out_len) 1122219820Sjeff{ 1123219820Sjeff struct rdma_ucm_migrate_id cmd; 1124219820Sjeff struct rdma_ucm_migrate_resp resp; 1125219820Sjeff struct ucma_context *ctx; 1126219820Sjeff struct file *filp; 1127219820Sjeff struct ucma_file *cur_file; 1128219820Sjeff int ret = 0; 1129219820Sjeff 1130219820Sjeff if (copy_from_user(&cmd, inbuf, sizeof(cmd))) 1131219820Sjeff return -EFAULT; 1132219820Sjeff 1133219820Sjeff /* Get current fd to protect against it being closed */ 1134219820Sjeff filp = fget(cmd.fd); 1135219820Sjeff if (!filp) 1136219820Sjeff return -ENOENT; 1137219820Sjeff 1138219820Sjeff /* Validate current fd and prevent destruction of id. */ 1139219820Sjeff ctx = ucma_get_ctx(filp->private_data, cmd.id); 1140219820Sjeff if (IS_ERR(ctx)) { 1141219820Sjeff ret = PTR_ERR(ctx); 1142219820Sjeff goto file_put; 1143219820Sjeff } 1144219820Sjeff 1145219820Sjeff cur_file = ctx->file; 1146219820Sjeff if (cur_file == new_file) { 1147219820Sjeff resp.events_reported = ctx->events_reported; 1148219820Sjeff goto response; 1149219820Sjeff } 1150219820Sjeff 1151219820Sjeff /* 1152219820Sjeff * Migrate events between fd's, maintaining order, and avoiding new 1153219820Sjeff * events being added before existing events. 1154219820Sjeff */ 1155219820Sjeff ucma_lock_files(cur_file, new_file); 1156219820Sjeff mutex_lock(&mut); 1157219820Sjeff 1158219820Sjeff list_move_tail(&ctx->list, &new_file->ctx_list); 1159219820Sjeff ucma_move_events(ctx, new_file); 1160219820Sjeff ctx->file = new_file; 1161219820Sjeff resp.events_reported = ctx->events_reported; 1162219820Sjeff 1163219820Sjeff mutex_unlock(&mut); 1164219820Sjeff ucma_unlock_files(cur_file, new_file); 1165219820Sjeff 1166219820Sjeffresponse: 1167219820Sjeff if (copy_to_user((void __user *)(unsigned long)cmd.response, 1168219820Sjeff &resp, sizeof(resp))) 1169219820Sjeff ret = -EFAULT; 1170219820Sjeff 1171219820Sjeff ucma_put_ctx(ctx); 1172219820Sjefffile_put: 1173219820Sjeff fput(filp); 1174219820Sjeff return ret; 1175219820Sjeff} 1176219820Sjeff 1177219820Sjeffstatic ssize_t (*ucma_cmd_table[])(struct ucma_file *file, 1178219820Sjeff const char __user *inbuf, 1179219820Sjeff int in_len, int out_len) = { 1180219820Sjeff [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, 1181219820Sjeff [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, 1182219820Sjeff [RDMA_USER_CM_CMD_BIND_ADDR] = ucma_bind_addr, 1183219820Sjeff [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, 1184219820Sjeff [RDMA_USER_CM_CMD_RESOLVE_ROUTE]= ucma_resolve_route, 1185219820Sjeff [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, 1186219820Sjeff [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, 1187219820Sjeff [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, 1188219820Sjeff [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, 1189219820Sjeff [RDMA_USER_CM_CMD_REJECT] = ucma_reject, 1190219820Sjeff [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, 1191219820Sjeff [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, 1192219820Sjeff [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, 1193219820Sjeff [RDMA_USER_CM_CMD_GET_OPTION] = NULL, 1194219820Sjeff [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, 1195219820Sjeff [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, 1196219820Sjeff [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast, 1197219820Sjeff [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, 1198219820Sjeff [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id 1199219820Sjeff}; 1200219820Sjeff 1201219820Sjeffstatic ssize_t ucma_write(struct file *filp, const char __user *buf, 1202219820Sjeff size_t len, loff_t *pos) 1203219820Sjeff{ 1204219820Sjeff struct ucma_file *file = filp->private_data; 1205219820Sjeff struct rdma_ucm_cmd_hdr hdr; 1206219820Sjeff ssize_t ret; 1207219820Sjeff 1208219820Sjeff if (len < sizeof(hdr)) 1209219820Sjeff return -EINVAL; 1210219820Sjeff 1211219820Sjeff if (copy_from_user(&hdr, buf, sizeof(hdr))) 1212219820Sjeff return -EFAULT; 1213219820Sjeff 1214219820Sjeff if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) 1215219820Sjeff return -EINVAL; 1216219820Sjeff 1217219820Sjeff if (hdr.in + sizeof(hdr) > len) 1218219820Sjeff return -EINVAL; 1219219820Sjeff 1220219820Sjeff if (!ucma_cmd_table[hdr.cmd]) 1221219820Sjeff return -ENOSYS; 1222219820Sjeff 1223219820Sjeff ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); 1224219820Sjeff if (!ret) 1225219820Sjeff ret = len; 1226219820Sjeff 1227219820Sjeff return ret; 1228219820Sjeff} 1229219820Sjeff 1230219820Sjeffstatic unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait) 1231219820Sjeff{ 1232219820Sjeff struct ucma_file *file = filp->private_data; 1233219820Sjeff unsigned int mask = 0; 1234219820Sjeff 1235219820Sjeff poll_wait(filp, &file->poll_wait, wait); 1236219820Sjeff 1237219820Sjeff if (!list_empty(&file->event_list)) 1238219820Sjeff mask = POLLIN | POLLRDNORM; 1239219820Sjeff 1240219820Sjeff return mask; 1241219820Sjeff} 1242219820Sjeff 1243219820Sjeff/* 1244219820Sjeff * ucma_open() does not need the BKL: 1245219820Sjeff * 1246219820Sjeff * - no global state is referred to; 1247219820Sjeff * - there is no ioctl method to race against; 1248219820Sjeff * - no further module initialization is required for open to work 1249219820Sjeff * after the device is registered. 1250219820Sjeff */ 1251219820Sjeffstatic int ucma_open(struct inode *inode, struct file *filp) 1252219820Sjeff{ 1253219820Sjeff struct ucma_file *file; 1254219820Sjeff 1255219820Sjeff file = kmalloc(sizeof *file, GFP_KERNEL); 1256219820Sjeff if (!file) 1257219820Sjeff return -ENOMEM; 1258219820Sjeff 1259219820Sjeff INIT_LIST_HEAD(&file->event_list); 1260219820Sjeff INIT_LIST_HEAD(&file->ctx_list); 1261219820Sjeff init_waitqueue_head(&file->poll_wait); 1262219820Sjeff mutex_init(&file->mut); 1263219820Sjeff 1264219820Sjeff filp->private_data = file; 1265219820Sjeff file->filp = filp; 1266219820Sjeff return 0; 1267219820Sjeff} 1268219820Sjeff 1269219820Sjeffstatic int ucma_close(struct inode *inode, struct file *filp) 1270219820Sjeff{ 1271219820Sjeff struct ucma_file *file = filp->private_data; 1272219820Sjeff struct ucma_context *ctx, *tmp; 1273219820Sjeff 1274219820Sjeff mutex_lock(&file->mut); 1275219820Sjeff list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { 1276219820Sjeff mutex_unlock(&file->mut); 1277219820Sjeff 1278219820Sjeff mutex_lock(&mut); 1279219820Sjeff idr_remove(&ctx_idr, ctx->id); 1280219820Sjeff mutex_unlock(&mut); 1281219820Sjeff 1282219820Sjeff ucma_free_ctx(ctx); 1283219820Sjeff mutex_lock(&file->mut); 1284219820Sjeff } 1285219820Sjeff mutex_unlock(&file->mut); 1286219820Sjeff kfree(file); 1287219820Sjeff return 0; 1288219820Sjeff} 1289219820Sjeff 1290304846Shselaskystatic long 1291304846Shselaskyucma_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1292304846Shselasky{ 1293304846Shselasky 1294304846Shselasky switch (cmd) { 1295304846Shselasky case FIONBIO: 1296304846Shselasky case FIOASYNC: 1297304846Shselasky return (0); 1298304846Shselasky default: 1299304846Shselasky return (-ENOTTY); 1300304846Shselasky } 1301304846Shselasky} 1302304846Shselasky 1303219820Sjeffstatic const struct file_operations ucma_fops = { 1304219820Sjeff .owner = THIS_MODULE, 1305219820Sjeff .open = ucma_open, 1306219820Sjeff .release = ucma_close, 1307219820Sjeff .write = ucma_write, 1308304846Shselasky .unlocked_ioctl = ucma_ioctl, 1309219820Sjeff .poll = ucma_poll, 1310219820Sjeff}; 1311219820Sjeff 1312219820Sjeffstatic struct miscdevice ucma_misc = { 1313219820Sjeff .minor = MISC_DYNAMIC_MINOR, 1314219820Sjeff .name = "rdma_cm", 1315219820Sjeff .fops = &ucma_fops, 1316219820Sjeff}; 1317219820Sjeff 1318219820Sjeffstatic ssize_t show_abi_version(struct device *dev, 1319219820Sjeff struct device_attribute *attr, 1320219820Sjeff char *buf) 1321219820Sjeff{ 1322219820Sjeff return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); 1323219820Sjeff} 1324219820Sjeffstatic DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); 1325219820Sjeff 1326219820Sjeffstatic int __init ucma_init(void) 1327219820Sjeff{ 1328219820Sjeff int ret; 1329219820Sjeff 1330219820Sjeff ret = misc_register(&ucma_misc); 1331219820Sjeff if (ret) 1332219820Sjeff return ret; 1333219820Sjeff 1334219820Sjeff ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); 1335219820Sjeff if (ret) { 1336219820Sjeff printk(KERN_ERR "rdma_ucm: couldn't create abi_version attr\n"); 1337219820Sjeff goto err; 1338219820Sjeff } 1339219820Sjeff return 0; 1340219820Sjefferr: 1341219820Sjeff misc_deregister(&ucma_misc); 1342219820Sjeff return ret; 1343219820Sjeff} 1344219820Sjeff 1345219820Sjeffstatic void __exit ucma_cleanup(void) 1346219820Sjeff{ 1347219820Sjeff device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); 1348219820Sjeff misc_deregister(&ucma_misc); 1349219820Sjeff idr_destroy(&ctx_idr); 1350219820Sjeff} 1351219820Sjeff 1352219820Sjeffmodule_init(ucma_init); 1353219820Sjeffmodule_exit(ucma_cleanup); 1354