Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. |
| 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
| 31 | */ |
| 32 | |
| 33 | #include <linux/completion.h> |
Sean Hefty | 88314e4 | 2007-11-14 00:29:50 -0800 | [diff] [blame] | 34 | #include <linux/file.h> |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 35 | #include <linux/mutex.h> |
| 36 | #include <linux/poll.h> |
Alexey Dobriyan | d43c36d | 2009-10-07 17:09:06 +0400 | [diff] [blame] | 37 | #include <linux/sched.h> |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 38 | #include <linux/idr.h> |
| 39 | #include <linux/in.h> |
| 40 | #include <linux/in6.h> |
| 41 | #include <linux/miscdevice.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 42 | #include <linux/slab.h> |
Steve Wise | 97cb7e4 | 2010-08-13 20:56:34 +0000 | [diff] [blame] | 43 | #include <linux/sysctl.h> |
Paul Gortmaker | e4dd23d | 2011-05-27 15:35:46 -0400 | [diff] [blame] | 44 | #include <linux/module.h> |
Guy Shapiro | 95893dd | 2015-10-22 15:20:11 +0300 | [diff] [blame] | 45 | #include <linux/nsproxy.h> |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 46 | |
| 47 | #include <rdma/rdma_user_cm.h> |
| 48 | #include <rdma/ib_marshall.h> |
| 49 | #include <rdma/rdma_cm.h> |
Sean Hefty | a7ca1f0 | 2009-11-16 09:30:33 -0800 | [diff] [blame] | 50 | #include <rdma/rdma_cm_ib.h> |
Sean Hefty | ee7aed4 | 2013-05-29 10:09:25 -0700 | [diff] [blame] | 51 | #include <rdma/ib_addr.h> |
Sean Hefty | edaa7a5 | 2013-05-29 10:09:29 -0700 | [diff] [blame] | 52 | #include <rdma/ib.h> |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 53 | |
| 54 | MODULE_AUTHOR("Sean Hefty"); |
| 55 | MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access"); |
| 56 | MODULE_LICENSE("Dual BSD/GPL"); |
| 57 | |
Steve Wise | 97cb7e4 | 2010-08-13 20:56:34 +0000 | [diff] [blame] | 58 | static unsigned int max_backlog = 1024; |
| 59 | |
| 60 | static struct ctl_table_header *ucma_ctl_table_hdr; |
Joe Perches | f3a5e3e | 2013-10-22 15:29:50 -0700 | [diff] [blame] | 61 | static struct ctl_table ucma_ctl_table[] = { |
Steve Wise | 97cb7e4 | 2010-08-13 20:56:34 +0000 | [diff] [blame] | 62 | { |
| 63 | .procname = "max_backlog", |
| 64 | .data = &max_backlog, |
| 65 | .maxlen = sizeof max_backlog, |
| 66 | .mode = 0644, |
| 67 | .proc_handler = proc_dointvec, |
| 68 | }, |
| 69 | { } |
| 70 | }; |
| 71 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 72 | struct ucma_file { |
| 73 | struct mutex mut; |
| 74 | struct file *filp; |
| 75 | struct list_head ctx_list; |
| 76 | struct list_head event_list; |
| 77 | wait_queue_head_t poll_wait; |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 78 | struct workqueue_struct *close_wq; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 79 | }; |
| 80 | |
| 81 | struct ucma_context { |
| 82 | int id; |
| 83 | struct completion comp; |
| 84 | atomic_t ref; |
| 85 | int events_reported; |
| 86 | int backlog; |
| 87 | |
| 88 | struct ucma_file *file; |
| 89 | struct rdma_cm_id *cm_id; |
| 90 | u64 uid; |
| 91 | |
| 92 | struct list_head list; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 93 | struct list_head mc_list; |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 94 | /* mark that device is in process of destroying the internal HW |
| 95 | * resources, protected by the global mut |
| 96 | */ |
| 97 | int closing; |
| 98 | /* sync between removal event and id destroy, protected by file mut */ |
| 99 | int destroying; |
| 100 | struct work_struct close_work; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 101 | }; |
| 102 | |
| 103 | struct ucma_multicast { |
| 104 | struct ucma_context *ctx; |
| 105 | int id; |
| 106 | int events_reported; |
| 107 | |
| 108 | u64 uid; |
| 109 | struct list_head list; |
Roland Dreier | 3f44675 | 2008-08-04 11:02:14 -0700 | [diff] [blame] | 110 | struct sockaddr_storage addr; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 111 | }; |
| 112 | |
| 113 | struct ucma_event { |
| 114 | struct ucma_context *ctx; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 115 | struct ucma_multicast *mc; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 116 | struct list_head list; |
| 117 | struct rdma_cm_id *cm_id; |
| 118 | struct rdma_ucm_event_resp resp; |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 119 | struct work_struct close_work; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 120 | }; |
| 121 | |
| 122 | static DEFINE_MUTEX(mut); |
| 123 | static DEFINE_IDR(ctx_idr); |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 124 | static DEFINE_IDR(multicast_idr); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 125 | |
| 126 | static inline struct ucma_context *_ucma_find_context(int id, |
| 127 | struct ucma_file *file) |
| 128 | { |
| 129 | struct ucma_context *ctx; |
| 130 | |
| 131 | ctx = idr_find(&ctx_idr, id); |
| 132 | if (!ctx) |
| 133 | ctx = ERR_PTR(-ENOENT); |
| 134 | else if (ctx->file != file) |
| 135 | ctx = ERR_PTR(-EINVAL); |
| 136 | return ctx; |
| 137 | } |
| 138 | |
| 139 | static struct ucma_context *ucma_get_ctx(struct ucma_file *file, int id) |
| 140 | { |
| 141 | struct ucma_context *ctx; |
| 142 | |
| 143 | mutex_lock(&mut); |
| 144 | ctx = _ucma_find_context(id, file); |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 145 | if (!IS_ERR(ctx)) { |
| 146 | if (ctx->closing) |
| 147 | ctx = ERR_PTR(-EIO); |
| 148 | else |
| 149 | atomic_inc(&ctx->ref); |
| 150 | } |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 151 | mutex_unlock(&mut); |
| 152 | return ctx; |
| 153 | } |
| 154 | |
| 155 | static void ucma_put_ctx(struct ucma_context *ctx) |
| 156 | { |
| 157 | if (atomic_dec_and_test(&ctx->ref)) |
| 158 | complete(&ctx->comp); |
| 159 | } |
| 160 | |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 161 | static void ucma_close_event_id(struct work_struct *work) |
| 162 | { |
| 163 | struct ucma_event *uevent_close = container_of(work, struct ucma_event, close_work); |
| 164 | |
| 165 | rdma_destroy_id(uevent_close->cm_id); |
| 166 | kfree(uevent_close); |
| 167 | } |
| 168 | |
| 169 | static void ucma_close_id(struct work_struct *work) |
| 170 | { |
| 171 | struct ucma_context *ctx = container_of(work, struct ucma_context, close_work); |
| 172 | |
| 173 | /* once all inflight tasks are finished, we close all underlying |
| 174 | * resources. The context is still alive till its explicit destryoing |
| 175 | * by its creator. |
| 176 | */ |
| 177 | ucma_put_ctx(ctx); |
| 178 | wait_for_completion(&ctx->comp); |
| 179 | /* No new events will be generated after destroying the id. */ |
| 180 | rdma_destroy_id(ctx->cm_id); |
| 181 | } |
| 182 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 183 | static struct ucma_context *ucma_alloc_ctx(struct ucma_file *file) |
| 184 | { |
| 185 | struct ucma_context *ctx; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 186 | |
| 187 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
| 188 | if (!ctx) |
| 189 | return NULL; |
| 190 | |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 191 | INIT_WORK(&ctx->close_work, ucma_close_id); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 192 | atomic_set(&ctx->ref, 1); |
| 193 | init_completion(&ctx->comp); |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 194 | INIT_LIST_HEAD(&ctx->mc_list); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 195 | ctx->file = file; |
| 196 | |
Tejun Heo | 3b069c5 | 2013-02-27 17:04:16 -0800 | [diff] [blame] | 197 | mutex_lock(&mut); |
| 198 | ctx->id = idr_alloc(&ctx_idr, ctx, 0, 0, GFP_KERNEL); |
| 199 | mutex_unlock(&mut); |
| 200 | if (ctx->id < 0) |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 201 | goto error; |
| 202 | |
| 203 | list_add_tail(&ctx->list, &file->ctx_list); |
| 204 | return ctx; |
| 205 | |
| 206 | error: |
| 207 | kfree(ctx); |
| 208 | return NULL; |
| 209 | } |
| 210 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 211 | static struct ucma_multicast* ucma_alloc_multicast(struct ucma_context *ctx) |
| 212 | { |
| 213 | struct ucma_multicast *mc; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 214 | |
| 215 | mc = kzalloc(sizeof(*mc), GFP_KERNEL); |
| 216 | if (!mc) |
| 217 | return NULL; |
| 218 | |
Tejun Heo | 3b069c5 | 2013-02-27 17:04:16 -0800 | [diff] [blame] | 219 | mutex_lock(&mut); |
| 220 | mc->id = idr_alloc(&multicast_idr, mc, 0, 0, GFP_KERNEL); |
| 221 | mutex_unlock(&mut); |
| 222 | if (mc->id < 0) |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 223 | goto error; |
| 224 | |
| 225 | mc->ctx = ctx; |
| 226 | list_add_tail(&mc->list, &ctx->mc_list); |
| 227 | return mc; |
| 228 | |
| 229 | error: |
| 230 | kfree(mc); |
| 231 | return NULL; |
| 232 | } |
| 233 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 234 | static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst, |
| 235 | struct rdma_conn_param *src) |
| 236 | { |
| 237 | if (src->private_data_len) |
| 238 | memcpy(dst->private_data, src->private_data, |
| 239 | src->private_data_len); |
| 240 | dst->private_data_len = src->private_data_len; |
| 241 | dst->responder_resources =src->responder_resources; |
| 242 | dst->initiator_depth = src->initiator_depth; |
| 243 | dst->flow_control = src->flow_control; |
| 244 | dst->retry_count = src->retry_count; |
| 245 | dst->rnr_retry_count = src->rnr_retry_count; |
| 246 | dst->srq = src->srq; |
| 247 | dst->qp_num = src->qp_num; |
| 248 | } |
| 249 | |
| 250 | static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst, |
| 251 | struct rdma_ud_param *src) |
| 252 | { |
| 253 | if (src->private_data_len) |
| 254 | memcpy(dst->private_data, src->private_data, |
| 255 | src->private_data_len); |
| 256 | dst->private_data_len = src->private_data_len; |
| 257 | ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr); |
| 258 | dst->qp_num = src->qp_num; |
| 259 | dst->qkey = src->qkey; |
| 260 | } |
| 261 | |
| 262 | static void ucma_set_event_context(struct ucma_context *ctx, |
| 263 | struct rdma_cm_event *event, |
| 264 | struct ucma_event *uevent) |
| 265 | { |
| 266 | uevent->ctx = ctx; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 267 | switch (event->event) { |
| 268 | case RDMA_CM_EVENT_MULTICAST_JOIN: |
| 269 | case RDMA_CM_EVENT_MULTICAST_ERROR: |
| 270 | uevent->mc = (struct ucma_multicast *) |
| 271 | event->param.ud.private_data; |
| 272 | uevent->resp.uid = uevent->mc->uid; |
| 273 | uevent->resp.id = uevent->mc->id; |
| 274 | break; |
| 275 | default: |
| 276 | uevent->resp.uid = ctx->uid; |
| 277 | uevent->resp.id = ctx->id; |
| 278 | break; |
| 279 | } |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 280 | } |
| 281 | |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 282 | /* Called with file->mut locked for the relevant context. */ |
| 283 | static void ucma_removal_event_handler(struct rdma_cm_id *cm_id) |
| 284 | { |
| 285 | struct ucma_context *ctx = cm_id->context; |
| 286 | struct ucma_event *con_req_eve; |
| 287 | int event_found = 0; |
| 288 | |
| 289 | if (ctx->destroying) |
| 290 | return; |
| 291 | |
| 292 | /* only if context is pointing to cm_id that it owns it and can be |
| 293 | * queued to be closed, otherwise that cm_id is an inflight one that |
| 294 | * is part of that context event list pending to be detached and |
| 295 | * reattached to its new context as part of ucma_get_event, |
| 296 | * handled separately below. |
| 297 | */ |
| 298 | if (ctx->cm_id == cm_id) { |
| 299 | mutex_lock(&mut); |
| 300 | ctx->closing = 1; |
| 301 | mutex_unlock(&mut); |
| 302 | queue_work(ctx->file->close_wq, &ctx->close_work); |
| 303 | return; |
| 304 | } |
| 305 | |
| 306 | list_for_each_entry(con_req_eve, &ctx->file->event_list, list) { |
| 307 | if (con_req_eve->cm_id == cm_id && |
| 308 | con_req_eve->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { |
| 309 | list_del(&con_req_eve->list); |
| 310 | INIT_WORK(&con_req_eve->close_work, ucma_close_event_id); |
| 311 | queue_work(ctx->file->close_wq, &con_req_eve->close_work); |
| 312 | event_found = 1; |
| 313 | break; |
| 314 | } |
| 315 | } |
| 316 | if (!event_found) |
Parav Pandit | aba25a3e | 2016-03-02 00:50:29 +0530 | [diff] [blame] | 317 | pr_err("ucma_removal_event_handler: warning: connect request event wasn't found\n"); |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 318 | } |
| 319 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 320 | static int ucma_event_handler(struct rdma_cm_id *cm_id, |
| 321 | struct rdma_cm_event *event) |
| 322 | { |
| 323 | struct ucma_event *uevent; |
| 324 | struct ucma_context *ctx = cm_id->context; |
| 325 | int ret = 0; |
| 326 | |
| 327 | uevent = kzalloc(sizeof(*uevent), GFP_KERNEL); |
| 328 | if (!uevent) |
| 329 | return event->event == RDMA_CM_EVENT_CONNECT_REQUEST; |
| 330 | |
Tatyana Nikolova | 418edaa | 2012-08-03 23:59:41 +0000 | [diff] [blame] | 331 | mutex_lock(&ctx->file->mut); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 332 | uevent->cm_id = cm_id; |
| 333 | ucma_set_event_context(ctx, event, uevent); |
| 334 | uevent->resp.event = event->event; |
| 335 | uevent->resp.status = event->status; |
Sean Hefty | 638ef7a | 2011-06-14 16:31:53 -0700 | [diff] [blame] | 336 | if (cm_id->qp_type == IB_QPT_UD) |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 337 | ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud); |
| 338 | else |
| 339 | ucma_copy_conn_event(&uevent->resp.param.conn, |
| 340 | &event->param.conn); |
| 341 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 342 | if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST) { |
| 343 | if (!ctx->backlog) { |
Sean Hefty | 3492856 | 2007-03-06 11:58:32 -0800 | [diff] [blame] | 344 | ret = -ENOMEM; |
Sean Hefty | 30a5ec9 | 2006-12-14 11:22:19 -0800 | [diff] [blame] | 345 | kfree(uevent); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 346 | goto out; |
| 347 | } |
| 348 | ctx->backlog--; |
Sean Hefty | c6b2182 | 2013-11-01 14:39:50 -0700 | [diff] [blame] | 349 | } else if (!ctx->uid || ctx->cm_id != cm_id) { |
Sean Hefty | 0cefcf0 | 2007-01-05 12:35:15 -0800 | [diff] [blame] | 350 | /* |
| 351 | * We ignore events for new connections until userspace has set |
| 352 | * their context. This can only happen if an error occurs on a |
| 353 | * new connection before the user accepts it. This is okay, |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 354 | * since the accept will just fail later. However, we do need |
| 355 | * to release the underlying HW resources in case of a device |
| 356 | * removal event. |
Sean Hefty | 0cefcf0 | 2007-01-05 12:35:15 -0800 | [diff] [blame] | 357 | */ |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 358 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
| 359 | ucma_removal_event_handler(cm_id); |
| 360 | |
Sean Hefty | 0cefcf0 | 2007-01-05 12:35:15 -0800 | [diff] [blame] | 361 | kfree(uevent); |
| 362 | goto out; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 363 | } |
Sean Hefty | 0cefcf0 | 2007-01-05 12:35:15 -0800 | [diff] [blame] | 364 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 365 | list_add_tail(&uevent->list, &ctx->file->event_list); |
| 366 | wake_up_interruptible(&ctx->file->poll_wait); |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 367 | if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL) |
| 368 | ucma_removal_event_handler(cm_id); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 369 | out: |
| 370 | mutex_unlock(&ctx->file->mut); |
| 371 | return ret; |
| 372 | } |
| 373 | |
| 374 | static ssize_t ucma_get_event(struct ucma_file *file, const char __user *inbuf, |
| 375 | int in_len, int out_len) |
| 376 | { |
| 377 | struct ucma_context *ctx; |
| 378 | struct rdma_ucm_get_event cmd; |
| 379 | struct ucma_event *uevent; |
| 380 | int ret = 0; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 381 | |
| 382 | if (out_len < sizeof uevent->resp) |
| 383 | return -ENOSPC; |
| 384 | |
| 385 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 386 | return -EFAULT; |
| 387 | |
| 388 | mutex_lock(&file->mut); |
| 389 | while (list_empty(&file->event_list)) { |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 390 | mutex_unlock(&file->mut); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 391 | |
Sean Hefty | d92f764 | 2007-04-05 10:49:51 -0700 | [diff] [blame] | 392 | if (file->filp->f_flags & O_NONBLOCK) |
| 393 | return -EAGAIN; |
| 394 | |
| 395 | if (wait_event_interruptible(file->poll_wait, |
| 396 | !list_empty(&file->event_list))) |
| 397 | return -ERESTARTSYS; |
| 398 | |
| 399 | mutex_lock(&file->mut); |
| 400 | } |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 401 | |
| 402 | uevent = list_entry(file->event_list.next, struct ucma_event, list); |
| 403 | |
| 404 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) { |
| 405 | ctx = ucma_alloc_ctx(file); |
| 406 | if (!ctx) { |
| 407 | ret = -ENOMEM; |
| 408 | goto done; |
| 409 | } |
| 410 | uevent->ctx->backlog++; |
| 411 | ctx->cm_id = uevent->cm_id; |
| 412 | ctx->cm_id->context = ctx; |
| 413 | uevent->resp.id = ctx->id; |
| 414 | } |
| 415 | |
| 416 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
| 417 | &uevent->resp, sizeof uevent->resp)) { |
| 418 | ret = -EFAULT; |
| 419 | goto done; |
| 420 | } |
| 421 | |
| 422 | list_del(&uevent->list); |
| 423 | uevent->ctx->events_reported++; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 424 | if (uevent->mc) |
| 425 | uevent->mc->events_reported++; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 426 | kfree(uevent); |
| 427 | done: |
| 428 | mutex_unlock(&file->mut); |
| 429 | return ret; |
| 430 | } |
| 431 | |
Sean Hefty | b26f9b9 | 2010-04-01 17:08:41 +0000 | [diff] [blame] | 432 | static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type) |
| 433 | { |
| 434 | switch (cmd->ps) { |
| 435 | case RDMA_PS_TCP: |
| 436 | *qp_type = IB_QPT_RC; |
| 437 | return 0; |
| 438 | case RDMA_PS_UDP: |
| 439 | case RDMA_PS_IPOIB: |
| 440 | *qp_type = IB_QPT_UD; |
| 441 | return 0; |
Sean Hefty | 638ef7a | 2011-06-14 16:31:53 -0700 | [diff] [blame] | 442 | case RDMA_PS_IB: |
| 443 | *qp_type = cmd->qp_type; |
| 444 | return 0; |
Sean Hefty | b26f9b9 | 2010-04-01 17:08:41 +0000 | [diff] [blame] | 445 | default: |
| 446 | return -EINVAL; |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf, |
| 451 | int in_len, int out_len) |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 452 | { |
| 453 | struct rdma_ucm_create_id cmd; |
| 454 | struct rdma_ucm_create_id_resp resp; |
| 455 | struct ucma_context *ctx; |
Sean Hefty | b26f9b9 | 2010-04-01 17:08:41 +0000 | [diff] [blame] | 456 | enum ib_qp_type qp_type; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 457 | int ret; |
| 458 | |
| 459 | if (out_len < sizeof(resp)) |
| 460 | return -ENOSPC; |
| 461 | |
| 462 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 463 | return -EFAULT; |
| 464 | |
Sean Hefty | b26f9b9 | 2010-04-01 17:08:41 +0000 | [diff] [blame] | 465 | ret = ucma_get_qp_type(&cmd, &qp_type); |
| 466 | if (ret) |
| 467 | return ret; |
| 468 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 469 | mutex_lock(&file->mut); |
| 470 | ctx = ucma_alloc_ctx(file); |
| 471 | mutex_unlock(&file->mut); |
| 472 | if (!ctx) |
| 473 | return -ENOMEM; |
| 474 | |
| 475 | ctx->uid = cmd.uid; |
Guy Shapiro | 95893dd | 2015-10-22 15:20:11 +0300 | [diff] [blame] | 476 | ctx->cm_id = rdma_create_id(current->nsproxy->net_ns, |
| 477 | ucma_event_handler, ctx, cmd.ps, qp_type); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 478 | if (IS_ERR(ctx->cm_id)) { |
| 479 | ret = PTR_ERR(ctx->cm_id); |
| 480 | goto err1; |
| 481 | } |
| 482 | |
| 483 | resp.id = ctx->id; |
| 484 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
| 485 | &resp, sizeof(resp))) { |
| 486 | ret = -EFAULT; |
| 487 | goto err2; |
| 488 | } |
| 489 | return 0; |
| 490 | |
| 491 | err2: |
| 492 | rdma_destroy_id(ctx->cm_id); |
| 493 | err1: |
| 494 | mutex_lock(&mut); |
| 495 | idr_remove(&ctx_idr, ctx->id); |
| 496 | mutex_unlock(&mut); |
| 497 | kfree(ctx); |
| 498 | return ret; |
| 499 | } |
| 500 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 501 | static void ucma_cleanup_multicast(struct ucma_context *ctx) |
| 502 | { |
| 503 | struct ucma_multicast *mc, *tmp; |
| 504 | |
| 505 | mutex_lock(&mut); |
| 506 | list_for_each_entry_safe(mc, tmp, &ctx->mc_list, list) { |
| 507 | list_del(&mc->list); |
| 508 | idr_remove(&multicast_idr, mc->id); |
| 509 | kfree(mc); |
| 510 | } |
| 511 | mutex_unlock(&mut); |
| 512 | } |
| 513 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 514 | static void ucma_cleanup_mc_events(struct ucma_multicast *mc) |
| 515 | { |
| 516 | struct ucma_event *uevent, *tmp; |
| 517 | |
| 518 | list_for_each_entry_safe(uevent, tmp, &mc->ctx->file->event_list, list) { |
| 519 | if (uevent->mc != mc) |
| 520 | continue; |
| 521 | |
| 522 | list_del(&uevent->list); |
| 523 | kfree(uevent); |
| 524 | } |
| 525 | } |
| 526 | |
Hefty, Sean | 186834b | 2012-03-02 00:01:19 +0000 | [diff] [blame] | 527 | /* |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 528 | * ucma_free_ctx is called after the underlying rdma CM-ID is destroyed. At |
| 529 | * this point, no new events will be reported from the hardware. However, we |
| 530 | * still need to cleanup the UCMA context for this ID. Specifically, there |
| 531 | * might be events that have not yet been consumed by the user space software. |
| 532 | * These might include pending connect requests which we have not completed |
| 533 | * processing. We cannot call rdma_destroy_id while holding the lock of the |
| 534 | * context (file->mut), as it might cause a deadlock. We therefore extract all |
| 535 | * relevant events from the context pending events list while holding the |
| 536 | * mutex. After that we release them as needed. |
Hefty, Sean | 186834b | 2012-03-02 00:01:19 +0000 | [diff] [blame] | 537 | */ |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 538 | static int ucma_free_ctx(struct ucma_context *ctx) |
| 539 | { |
| 540 | int events_reported; |
Hefty, Sean | 186834b | 2012-03-02 00:01:19 +0000 | [diff] [blame] | 541 | struct ucma_event *uevent, *tmp; |
| 542 | LIST_HEAD(list); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 543 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 544 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 545 | ucma_cleanup_multicast(ctx); |
| 546 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 547 | /* Cleanup events not yet reported to the user. */ |
| 548 | mutex_lock(&ctx->file->mut); |
Hefty, Sean | 186834b | 2012-03-02 00:01:19 +0000 | [diff] [blame] | 549 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) { |
| 550 | if (uevent->ctx == ctx) |
| 551 | list_move_tail(&uevent->list, &list); |
| 552 | } |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 553 | list_del(&ctx->list); |
| 554 | mutex_unlock(&ctx->file->mut); |
| 555 | |
Hefty, Sean | 186834b | 2012-03-02 00:01:19 +0000 | [diff] [blame] | 556 | list_for_each_entry_safe(uevent, tmp, &list, list) { |
| 557 | list_del(&uevent->list); |
| 558 | if (uevent->resp.event == RDMA_CM_EVENT_CONNECT_REQUEST) |
| 559 | rdma_destroy_id(uevent->cm_id); |
| 560 | kfree(uevent); |
| 561 | } |
| 562 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 563 | events_reported = ctx->events_reported; |
| 564 | kfree(ctx); |
| 565 | return events_reported; |
| 566 | } |
| 567 | |
| 568 | static ssize_t ucma_destroy_id(struct ucma_file *file, const char __user *inbuf, |
| 569 | int in_len, int out_len) |
| 570 | { |
| 571 | struct rdma_ucm_destroy_id cmd; |
| 572 | struct rdma_ucm_destroy_id_resp resp; |
| 573 | struct ucma_context *ctx; |
| 574 | int ret = 0; |
| 575 | |
| 576 | if (out_len < sizeof(resp)) |
| 577 | return -ENOSPC; |
| 578 | |
| 579 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 580 | return -EFAULT; |
| 581 | |
| 582 | mutex_lock(&mut); |
| 583 | ctx = _ucma_find_context(cmd.id, file); |
| 584 | if (!IS_ERR(ctx)) |
| 585 | idr_remove(&ctx_idr, ctx->id); |
| 586 | mutex_unlock(&mut); |
| 587 | |
| 588 | if (IS_ERR(ctx)) |
| 589 | return PTR_ERR(ctx); |
| 590 | |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 591 | mutex_lock(&ctx->file->mut); |
| 592 | ctx->destroying = 1; |
| 593 | mutex_unlock(&ctx->file->mut); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 594 | |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 595 | flush_workqueue(ctx->file->close_wq); |
| 596 | /* At this point it's guaranteed that there is no inflight |
| 597 | * closing task */ |
| 598 | mutex_lock(&mut); |
| 599 | if (!ctx->closing) { |
| 600 | mutex_unlock(&mut); |
| 601 | ucma_put_ctx(ctx); |
| 602 | wait_for_completion(&ctx->comp); |
| 603 | rdma_destroy_id(ctx->cm_id); |
| 604 | } else { |
| 605 | mutex_unlock(&mut); |
| 606 | } |
| 607 | |
| 608 | resp.events_reported = ucma_free_ctx(ctx); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 609 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
| 610 | &resp, sizeof(resp))) |
| 611 | ret = -EFAULT; |
| 612 | |
| 613 | return ret; |
| 614 | } |
| 615 | |
Sean Hefty | 05ad945 | 2013-05-29 10:09:30 -0700 | [diff] [blame] | 616 | static ssize_t ucma_bind_ip(struct ucma_file *file, const char __user *inbuf, |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 617 | int in_len, int out_len) |
| 618 | { |
Sean Hefty | 05ad945 | 2013-05-29 10:09:30 -0700 | [diff] [blame] | 619 | struct rdma_ucm_bind_ip cmd; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 620 | struct ucma_context *ctx; |
| 621 | int ret; |
| 622 | |
| 623 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 624 | return -EFAULT; |
| 625 | |
| 626 | ctx = ucma_get_ctx(file, cmd.id); |
| 627 | if (IS_ERR(ctx)) |
| 628 | return PTR_ERR(ctx); |
| 629 | |
| 630 | ret = rdma_bind_addr(ctx->cm_id, (struct sockaddr *) &cmd.addr); |
| 631 | ucma_put_ctx(ctx); |
| 632 | return ret; |
| 633 | } |
| 634 | |
Sean Hefty | eebe4c3 | 2013-05-29 10:09:31 -0700 | [diff] [blame] | 635 | static ssize_t ucma_bind(struct ucma_file *file, const char __user *inbuf, |
| 636 | int in_len, int out_len) |
| 637 | { |
| 638 | struct rdma_ucm_bind cmd; |
| 639 | struct sockaddr *addr; |
| 640 | struct ucma_context *ctx; |
| 641 | int ret; |
| 642 | |
| 643 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 644 | return -EFAULT; |
| 645 | |
| 646 | addr = (struct sockaddr *) &cmd.addr; |
| 647 | if (cmd.reserved || !cmd.addr_size || (cmd.addr_size != rdma_addr_size(addr))) |
| 648 | return -EINVAL; |
| 649 | |
| 650 | ctx = ucma_get_ctx(file, cmd.id); |
| 651 | if (IS_ERR(ctx)) |
| 652 | return PTR_ERR(ctx); |
| 653 | |
| 654 | ret = rdma_bind_addr(ctx->cm_id, addr); |
| 655 | ucma_put_ctx(ctx); |
| 656 | return ret; |
| 657 | } |
| 658 | |
Sean Hefty | 05ad945 | 2013-05-29 10:09:30 -0700 | [diff] [blame] | 659 | static ssize_t ucma_resolve_ip(struct ucma_file *file, |
| 660 | const char __user *inbuf, |
| 661 | int in_len, int out_len) |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 662 | { |
Sean Hefty | 05ad945 | 2013-05-29 10:09:30 -0700 | [diff] [blame] | 663 | struct rdma_ucm_resolve_ip cmd; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 664 | struct ucma_context *ctx; |
| 665 | int ret; |
| 666 | |
| 667 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 668 | return -EFAULT; |
| 669 | |
| 670 | ctx = ucma_get_ctx(file, cmd.id); |
| 671 | if (IS_ERR(ctx)) |
| 672 | return PTR_ERR(ctx); |
| 673 | |
| 674 | ret = rdma_resolve_addr(ctx->cm_id, (struct sockaddr *) &cmd.src_addr, |
| 675 | (struct sockaddr *) &cmd.dst_addr, |
| 676 | cmd.timeout_ms); |
| 677 | ucma_put_ctx(ctx); |
| 678 | return ret; |
| 679 | } |
| 680 | |
Sean Hefty | 209cf2a | 2013-05-29 10:09:32 -0700 | [diff] [blame] | 681 | static ssize_t ucma_resolve_addr(struct ucma_file *file, |
| 682 | const char __user *inbuf, |
| 683 | int in_len, int out_len) |
| 684 | { |
| 685 | struct rdma_ucm_resolve_addr cmd; |
| 686 | struct sockaddr *src, *dst; |
| 687 | struct ucma_context *ctx; |
| 688 | int ret; |
| 689 | |
| 690 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 691 | return -EFAULT; |
| 692 | |
| 693 | src = (struct sockaddr *) &cmd.src_addr; |
| 694 | dst = (struct sockaddr *) &cmd.dst_addr; |
| 695 | if (cmd.reserved || (cmd.src_size && (cmd.src_size != rdma_addr_size(src))) || |
| 696 | !cmd.dst_size || (cmd.dst_size != rdma_addr_size(dst))) |
| 697 | return -EINVAL; |
| 698 | |
| 699 | ctx = ucma_get_ctx(file, cmd.id); |
| 700 | if (IS_ERR(ctx)) |
| 701 | return PTR_ERR(ctx); |
| 702 | |
| 703 | ret = rdma_resolve_addr(ctx->cm_id, src, dst, cmd.timeout_ms); |
| 704 | ucma_put_ctx(ctx); |
| 705 | return ret; |
| 706 | } |
| 707 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 708 | static ssize_t ucma_resolve_route(struct ucma_file *file, |
| 709 | const char __user *inbuf, |
| 710 | int in_len, int out_len) |
| 711 | { |
| 712 | struct rdma_ucm_resolve_route cmd; |
| 713 | struct ucma_context *ctx; |
| 714 | int ret; |
| 715 | |
| 716 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 717 | return -EFAULT; |
| 718 | |
| 719 | ctx = ucma_get_ctx(file, cmd.id); |
| 720 | if (IS_ERR(ctx)) |
| 721 | return PTR_ERR(ctx); |
| 722 | |
| 723 | ret = rdma_resolve_route(ctx->cm_id, cmd.timeout_ms); |
| 724 | ucma_put_ctx(ctx); |
| 725 | return ret; |
| 726 | } |
| 727 | |
| 728 | static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp, |
| 729 | struct rdma_route *route) |
| 730 | { |
| 731 | struct rdma_dev_addr *dev_addr; |
| 732 | |
| 733 | resp->num_paths = route->num_paths; |
| 734 | switch (route->num_paths) { |
| 735 | case 0: |
| 736 | dev_addr = &route->addr.dev_addr; |
Sean Hefty | 6f8372b | 2009-11-19 13:26:06 -0800 | [diff] [blame] | 737 | rdma_addr_get_dgid(dev_addr, |
| 738 | (union ib_gid *) &resp->ib_route[0].dgid); |
| 739 | rdma_addr_get_sgid(dev_addr, |
| 740 | (union ib_gid *) &resp->ib_route[0].sgid); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 741 | resp->ib_route[0].pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); |
| 742 | break; |
| 743 | case 2: |
| 744 | ib_copy_path_rec_to_user(&resp->ib_route[1], |
| 745 | &route->path_rec[1]); |
| 746 | /* fall through */ |
| 747 | case 1: |
| 748 | ib_copy_path_rec_to_user(&resp->ib_route[0], |
| 749 | &route->path_rec[0]); |
| 750 | break; |
| 751 | default: |
| 752 | break; |
| 753 | } |
| 754 | } |
| 755 | |
Eli Cohen | 3c86aa7 | 2010-10-13 21:26:51 +0200 | [diff] [blame] | 756 | static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp, |
| 757 | struct rdma_route *route) |
| 758 | { |
Eli Cohen | 3c86aa7 | 2010-10-13 21:26:51 +0200 | [diff] [blame] | 759 | |
| 760 | resp->num_paths = route->num_paths; |
| 761 | switch (route->num_paths) { |
| 762 | case 0: |
Moni Shoua | 7b85627 | 2013-12-12 18:03:12 +0200 | [diff] [blame] | 763 | rdma_ip2gid((struct sockaddr *)&route->addr.dst_addr, |
| 764 | (union ib_gid *)&resp->ib_route[0].dgid); |
| 765 | rdma_ip2gid((struct sockaddr *)&route->addr.src_addr, |
| 766 | (union ib_gid *)&resp->ib_route[0].sgid); |
Eli Cohen | 3c86aa7 | 2010-10-13 21:26:51 +0200 | [diff] [blame] | 767 | resp->ib_route[0].pkey = cpu_to_be16(0xffff); |
| 768 | break; |
| 769 | case 2: |
| 770 | ib_copy_path_rec_to_user(&resp->ib_route[1], |
| 771 | &route->path_rec[1]); |
| 772 | /* fall through */ |
| 773 | case 1: |
| 774 | ib_copy_path_rec_to_user(&resp->ib_route[0], |
| 775 | &route->path_rec[0]); |
| 776 | break; |
| 777 | default: |
| 778 | break; |
| 779 | } |
| 780 | } |
| 781 | |
Steve Wise | e86f8b0 | 2011-01-21 03:40:46 +0000 | [diff] [blame] | 782 | static void ucma_copy_iw_route(struct rdma_ucm_query_route_resp *resp, |
| 783 | struct rdma_route *route) |
| 784 | { |
| 785 | struct rdma_dev_addr *dev_addr; |
| 786 | |
| 787 | dev_addr = &route->addr.dev_addr; |
| 788 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &resp->ib_route[0].dgid); |
| 789 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &resp->ib_route[0].sgid); |
| 790 | } |
| 791 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 792 | static ssize_t ucma_query_route(struct ucma_file *file, |
| 793 | const char __user *inbuf, |
| 794 | int in_len, int out_len) |
| 795 | { |
Sean Hefty | ee7aed4 | 2013-05-29 10:09:25 -0700 | [diff] [blame] | 796 | struct rdma_ucm_query cmd; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 797 | struct rdma_ucm_query_route_resp resp; |
| 798 | struct ucma_context *ctx; |
| 799 | struct sockaddr *addr; |
| 800 | int ret = 0; |
| 801 | |
| 802 | if (out_len < sizeof(resp)) |
| 803 | return -ENOSPC; |
| 804 | |
| 805 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 806 | return -EFAULT; |
| 807 | |
| 808 | ctx = ucma_get_ctx(file, cmd.id); |
| 809 | if (IS_ERR(ctx)) |
| 810 | return PTR_ERR(ctx); |
| 811 | |
| 812 | memset(&resp, 0, sizeof resp); |
Roland Dreier | 3f44675 | 2008-08-04 11:02:14 -0700 | [diff] [blame] | 813 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 814 | memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ? |
| 815 | sizeof(struct sockaddr_in) : |
| 816 | sizeof(struct sockaddr_in6)); |
Roland Dreier | 3f44675 | 2008-08-04 11:02:14 -0700 | [diff] [blame] | 817 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 818 | memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ? |
| 819 | sizeof(struct sockaddr_in) : |
| 820 | sizeof(struct sockaddr_in6)); |
| 821 | if (!ctx->cm_id->device) |
| 822 | goto out; |
| 823 | |
Roland Dreier | 9cda779 | 2008-04-16 21:01:07 -0700 | [diff] [blame] | 824 | resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 825 | resp.port_num = ctx->cm_id->port_num; |
Michael Wang | c72f218 | 2015-05-05 14:50:28 +0200 | [diff] [blame] | 826 | |
Michael Wang | fe53ba2 | 2015-05-05 14:50:36 +0200 | [diff] [blame] | 827 | if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num)) |
Michael Wang | c72f218 | 2015-05-05 14:50:28 +0200 | [diff] [blame] | 828 | ucma_copy_ib_route(&resp, &ctx->cm_id->route); |
Ira Weiny | 5d9fb04 | 2015-05-14 15:01:46 -0400 | [diff] [blame] | 829 | else if (rdma_protocol_roce(ctx->cm_id->device, ctx->cm_id->port_num)) |
Michael Wang | c72f218 | 2015-05-05 14:50:28 +0200 | [diff] [blame] | 830 | ucma_copy_iboe_route(&resp, &ctx->cm_id->route); |
| 831 | else if (rdma_protocol_iwarp(ctx->cm_id->device, ctx->cm_id->port_num)) |
Steve Wise | e86f8b0 | 2011-01-21 03:40:46 +0000 | [diff] [blame] | 832 | ucma_copy_iw_route(&resp, &ctx->cm_id->route); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 833 | |
| 834 | out: |
| 835 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
| 836 | &resp, sizeof(resp))) |
| 837 | ret = -EFAULT; |
| 838 | |
| 839 | ucma_put_ctx(ctx); |
| 840 | return ret; |
| 841 | } |
| 842 | |
Sean Hefty | ee7aed4 | 2013-05-29 10:09:25 -0700 | [diff] [blame] | 843 | static void ucma_query_device_addr(struct rdma_cm_id *cm_id, |
| 844 | struct rdma_ucm_query_addr_resp *resp) |
| 845 | { |
| 846 | if (!cm_id->device) |
| 847 | return; |
| 848 | |
| 849 | resp->node_guid = (__force __u64) cm_id->device->node_guid; |
| 850 | resp->port_num = cm_id->port_num; |
| 851 | resp->pkey = (__force __u16) cpu_to_be16( |
| 852 | ib_addr_get_pkey(&cm_id->route.addr.dev_addr)); |
| 853 | } |
| 854 | |
| 855 | static ssize_t ucma_query_addr(struct ucma_context *ctx, |
| 856 | void __user *response, int out_len) |
| 857 | { |
| 858 | struct rdma_ucm_query_addr_resp resp; |
| 859 | struct sockaddr *addr; |
| 860 | int ret = 0; |
| 861 | |
| 862 | if (out_len < sizeof(resp)) |
| 863 | return -ENOSPC; |
| 864 | |
| 865 | memset(&resp, 0, sizeof resp); |
| 866 | |
| 867 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr; |
| 868 | resp.src_size = rdma_addr_size(addr); |
| 869 | memcpy(&resp.src_addr, addr, resp.src_size); |
| 870 | |
| 871 | addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr; |
| 872 | resp.dst_size = rdma_addr_size(addr); |
| 873 | memcpy(&resp.dst_addr, addr, resp.dst_size); |
| 874 | |
| 875 | ucma_query_device_addr(ctx->cm_id, &resp); |
| 876 | |
| 877 | if (copy_to_user(response, &resp, sizeof(resp))) |
| 878 | ret = -EFAULT; |
| 879 | |
| 880 | return ret; |
| 881 | } |
| 882 | |
Sean Hefty | ac53b26 | 2013-05-29 10:09:27 -0700 | [diff] [blame] | 883 | static ssize_t ucma_query_path(struct ucma_context *ctx, |
| 884 | void __user *response, int out_len) |
| 885 | { |
| 886 | struct rdma_ucm_query_path_resp *resp; |
| 887 | int i, ret = 0; |
| 888 | |
| 889 | if (out_len < sizeof(*resp)) |
| 890 | return -ENOSPC; |
| 891 | |
| 892 | resp = kzalloc(out_len, GFP_KERNEL); |
| 893 | if (!resp) |
| 894 | return -ENOMEM; |
| 895 | |
| 896 | resp->num_paths = ctx->cm_id->route.num_paths; |
| 897 | for (i = 0, out_len -= sizeof(*resp); |
| 898 | i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data); |
| 899 | i++, out_len -= sizeof(struct ib_path_rec_data)) { |
| 900 | |
| 901 | resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | |
| 902 | IB_PATH_BIDIRECTIONAL; |
| 903 | ib_sa_pack_path(&ctx->cm_id->route.path_rec[i], |
| 904 | &resp->path_data[i].path_rec); |
| 905 | } |
| 906 | |
| 907 | if (copy_to_user(response, resp, |
| 908 | sizeof(*resp) + (i * sizeof(struct ib_path_rec_data)))) |
| 909 | ret = -EFAULT; |
| 910 | |
| 911 | kfree(resp); |
| 912 | return ret; |
| 913 | } |
| 914 | |
Sean Hefty | edaa7a5 | 2013-05-29 10:09:29 -0700 | [diff] [blame] | 915 | static ssize_t ucma_query_gid(struct ucma_context *ctx, |
| 916 | void __user *response, int out_len) |
| 917 | { |
| 918 | struct rdma_ucm_query_addr_resp resp; |
| 919 | struct sockaddr_ib *addr; |
| 920 | int ret = 0; |
| 921 | |
| 922 | if (out_len < sizeof(resp)) |
| 923 | return -ENOSPC; |
| 924 | |
| 925 | memset(&resp, 0, sizeof resp); |
| 926 | |
| 927 | ucma_query_device_addr(ctx->cm_id, &resp); |
| 928 | |
| 929 | addr = (struct sockaddr_ib *) &resp.src_addr; |
| 930 | resp.src_size = sizeof(*addr); |
| 931 | if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) { |
| 932 | memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size); |
| 933 | } else { |
| 934 | addr->sib_family = AF_IB; |
| 935 | addr->sib_pkey = (__force __be16) resp.pkey; |
| 936 | rdma_addr_get_sgid(&ctx->cm_id->route.addr.dev_addr, |
| 937 | (union ib_gid *) &addr->sib_addr); |
| 938 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
| 939 | &ctx->cm_id->route.addr.src_addr); |
| 940 | } |
| 941 | |
| 942 | addr = (struct sockaddr_ib *) &resp.dst_addr; |
| 943 | resp.dst_size = sizeof(*addr); |
| 944 | if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) { |
| 945 | memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size); |
| 946 | } else { |
| 947 | addr->sib_family = AF_IB; |
| 948 | addr->sib_pkey = (__force __be16) resp.pkey; |
| 949 | rdma_addr_get_dgid(&ctx->cm_id->route.addr.dev_addr, |
| 950 | (union ib_gid *) &addr->sib_addr); |
| 951 | addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *) |
| 952 | &ctx->cm_id->route.addr.dst_addr); |
| 953 | } |
| 954 | |
| 955 | if (copy_to_user(response, &resp, sizeof(resp))) |
| 956 | ret = -EFAULT; |
| 957 | |
| 958 | return ret; |
| 959 | } |
| 960 | |
Sean Hefty | ee7aed4 | 2013-05-29 10:09:25 -0700 | [diff] [blame] | 961 | static ssize_t ucma_query(struct ucma_file *file, |
| 962 | const char __user *inbuf, |
| 963 | int in_len, int out_len) |
| 964 | { |
| 965 | struct rdma_ucm_query cmd; |
| 966 | struct ucma_context *ctx; |
| 967 | void __user *response; |
| 968 | int ret; |
| 969 | |
| 970 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 971 | return -EFAULT; |
| 972 | |
| 973 | response = (void __user *)(unsigned long) cmd.response; |
| 974 | ctx = ucma_get_ctx(file, cmd.id); |
| 975 | if (IS_ERR(ctx)) |
| 976 | return PTR_ERR(ctx); |
| 977 | |
| 978 | switch (cmd.option) { |
| 979 | case RDMA_USER_CM_QUERY_ADDR: |
| 980 | ret = ucma_query_addr(ctx, response, out_len); |
| 981 | break; |
Sean Hefty | ac53b26 | 2013-05-29 10:09:27 -0700 | [diff] [blame] | 982 | case RDMA_USER_CM_QUERY_PATH: |
| 983 | ret = ucma_query_path(ctx, response, out_len); |
| 984 | break; |
Sean Hefty | edaa7a5 | 2013-05-29 10:09:29 -0700 | [diff] [blame] | 985 | case RDMA_USER_CM_QUERY_GID: |
| 986 | ret = ucma_query_gid(ctx, response, out_len); |
| 987 | break; |
Sean Hefty | ee7aed4 | 2013-05-29 10:09:25 -0700 | [diff] [blame] | 988 | default: |
| 989 | ret = -ENOSYS; |
| 990 | break; |
| 991 | } |
| 992 | |
| 993 | ucma_put_ctx(ctx); |
| 994 | return ret; |
| 995 | } |
| 996 | |
Sean Hefty | 5c43813 | 2013-05-29 10:09:23 -0700 | [diff] [blame] | 997 | static void ucma_copy_conn_param(struct rdma_cm_id *id, |
| 998 | struct rdma_conn_param *dst, |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 999 | struct rdma_ucm_conn_param *src) |
| 1000 | { |
| 1001 | dst->private_data = src->private_data; |
| 1002 | dst->private_data_len = src->private_data_len; |
| 1003 | dst->responder_resources =src->responder_resources; |
| 1004 | dst->initiator_depth = src->initiator_depth; |
| 1005 | dst->flow_control = src->flow_control; |
| 1006 | dst->retry_count = src->retry_count; |
| 1007 | dst->rnr_retry_count = src->rnr_retry_count; |
| 1008 | dst->srq = src->srq; |
| 1009 | dst->qp_num = src->qp_num; |
Sean Hefty | 5c43813 | 2013-05-29 10:09:23 -0700 | [diff] [blame] | 1010 | dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1011 | } |
| 1012 | |
| 1013 | static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf, |
| 1014 | int in_len, int out_len) |
| 1015 | { |
| 1016 | struct rdma_ucm_connect cmd; |
| 1017 | struct rdma_conn_param conn_param; |
| 1018 | struct ucma_context *ctx; |
| 1019 | int ret; |
| 1020 | |
| 1021 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1022 | return -EFAULT; |
| 1023 | |
| 1024 | if (!cmd.conn_param.valid) |
| 1025 | return -EINVAL; |
| 1026 | |
| 1027 | ctx = ucma_get_ctx(file, cmd.id); |
| 1028 | if (IS_ERR(ctx)) |
| 1029 | return PTR_ERR(ctx); |
| 1030 | |
Sean Hefty | 5c43813 | 2013-05-29 10:09:23 -0700 | [diff] [blame] | 1031 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1032 | ret = rdma_connect(ctx->cm_id, &conn_param); |
| 1033 | ucma_put_ctx(ctx); |
| 1034 | return ret; |
| 1035 | } |
| 1036 | |
| 1037 | static ssize_t ucma_listen(struct ucma_file *file, const char __user *inbuf, |
| 1038 | int in_len, int out_len) |
| 1039 | { |
| 1040 | struct rdma_ucm_listen cmd; |
| 1041 | struct ucma_context *ctx; |
| 1042 | int ret; |
| 1043 | |
| 1044 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1045 | return -EFAULT; |
| 1046 | |
| 1047 | ctx = ucma_get_ctx(file, cmd.id); |
| 1048 | if (IS_ERR(ctx)) |
| 1049 | return PTR_ERR(ctx); |
| 1050 | |
Steve Wise | 97cb7e4 | 2010-08-13 20:56:34 +0000 | [diff] [blame] | 1051 | ctx->backlog = cmd.backlog > 0 && cmd.backlog < max_backlog ? |
| 1052 | cmd.backlog : max_backlog; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1053 | ret = rdma_listen(ctx->cm_id, ctx->backlog); |
| 1054 | ucma_put_ctx(ctx); |
| 1055 | return ret; |
| 1056 | } |
| 1057 | |
| 1058 | static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf, |
| 1059 | int in_len, int out_len) |
| 1060 | { |
| 1061 | struct rdma_ucm_accept cmd; |
| 1062 | struct rdma_conn_param conn_param; |
| 1063 | struct ucma_context *ctx; |
| 1064 | int ret; |
| 1065 | |
| 1066 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1067 | return -EFAULT; |
| 1068 | |
| 1069 | ctx = ucma_get_ctx(file, cmd.id); |
| 1070 | if (IS_ERR(ctx)) |
| 1071 | return PTR_ERR(ctx); |
| 1072 | |
| 1073 | if (cmd.conn_param.valid) { |
Sean Hefty | 5c43813 | 2013-05-29 10:09:23 -0700 | [diff] [blame] | 1074 | ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param); |
Sean Hefty | 9ced69c | 2012-01-10 23:53:41 +0000 | [diff] [blame] | 1075 | mutex_lock(&file->mut); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1076 | ret = rdma_accept(ctx->cm_id, &conn_param); |
Sean Hefty | 9ced69c | 2012-01-10 23:53:41 +0000 | [diff] [blame] | 1077 | if (!ret) |
| 1078 | ctx->uid = cmd.uid; |
| 1079 | mutex_unlock(&file->mut); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1080 | } else |
| 1081 | ret = rdma_accept(ctx->cm_id, NULL); |
| 1082 | |
| 1083 | ucma_put_ctx(ctx); |
| 1084 | return ret; |
| 1085 | } |
| 1086 | |
| 1087 | static ssize_t ucma_reject(struct ucma_file *file, const char __user *inbuf, |
| 1088 | int in_len, int out_len) |
| 1089 | { |
| 1090 | struct rdma_ucm_reject cmd; |
| 1091 | struct ucma_context *ctx; |
| 1092 | int ret; |
| 1093 | |
| 1094 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1095 | return -EFAULT; |
| 1096 | |
| 1097 | ctx = ucma_get_ctx(file, cmd.id); |
| 1098 | if (IS_ERR(ctx)) |
| 1099 | return PTR_ERR(ctx); |
| 1100 | |
| 1101 | ret = rdma_reject(ctx->cm_id, cmd.private_data, cmd.private_data_len); |
| 1102 | ucma_put_ctx(ctx); |
| 1103 | return ret; |
| 1104 | } |
| 1105 | |
| 1106 | static ssize_t ucma_disconnect(struct ucma_file *file, const char __user *inbuf, |
| 1107 | int in_len, int out_len) |
| 1108 | { |
| 1109 | struct rdma_ucm_disconnect cmd; |
| 1110 | struct ucma_context *ctx; |
| 1111 | int ret; |
| 1112 | |
| 1113 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1114 | return -EFAULT; |
| 1115 | |
| 1116 | ctx = ucma_get_ctx(file, cmd.id); |
| 1117 | if (IS_ERR(ctx)) |
| 1118 | return PTR_ERR(ctx); |
| 1119 | |
| 1120 | ret = rdma_disconnect(ctx->cm_id); |
| 1121 | ucma_put_ctx(ctx); |
| 1122 | return ret; |
| 1123 | } |
| 1124 | |
| 1125 | static ssize_t ucma_init_qp_attr(struct ucma_file *file, |
| 1126 | const char __user *inbuf, |
| 1127 | int in_len, int out_len) |
| 1128 | { |
| 1129 | struct rdma_ucm_init_qp_attr cmd; |
| 1130 | struct ib_uverbs_qp_attr resp; |
| 1131 | struct ucma_context *ctx; |
| 1132 | struct ib_qp_attr qp_attr; |
| 1133 | int ret; |
| 1134 | |
| 1135 | if (out_len < sizeof(resp)) |
| 1136 | return -ENOSPC; |
| 1137 | |
| 1138 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1139 | return -EFAULT; |
| 1140 | |
| 1141 | ctx = ucma_get_ctx(file, cmd.id); |
| 1142 | if (IS_ERR(ctx)) |
| 1143 | return PTR_ERR(ctx); |
| 1144 | |
| 1145 | resp.qp_attr_mask = 0; |
| 1146 | memset(&qp_attr, 0, sizeof qp_attr); |
| 1147 | qp_attr.qp_state = cmd.qp_state; |
| 1148 | ret = rdma_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); |
| 1149 | if (ret) |
| 1150 | goto out; |
| 1151 | |
| 1152 | ib_copy_qp_attr_to_user(&resp, &qp_attr); |
| 1153 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
| 1154 | &resp, sizeof(resp))) |
| 1155 | ret = -EFAULT; |
| 1156 | |
| 1157 | out: |
| 1158 | ucma_put_ctx(ctx); |
| 1159 | return ret; |
| 1160 | } |
| 1161 | |
Sean Hefty | 7ce8640 | 2007-08-08 15:51:13 -0700 | [diff] [blame] | 1162 | static int ucma_set_option_id(struct ucma_context *ctx, int optname, |
| 1163 | void *optval, size_t optlen) |
| 1164 | { |
| 1165 | int ret = 0; |
| 1166 | |
| 1167 | switch (optname) { |
| 1168 | case RDMA_OPTION_ID_TOS: |
| 1169 | if (optlen != sizeof(u8)) { |
| 1170 | ret = -EINVAL; |
| 1171 | break; |
| 1172 | } |
| 1173 | rdma_set_service_type(ctx->cm_id, *((u8 *) optval)); |
| 1174 | break; |
Hefty, Sean | a9bb791 | 2011-05-09 22:06:10 -0700 | [diff] [blame] | 1175 | case RDMA_OPTION_ID_REUSEADDR: |
| 1176 | if (optlen != sizeof(int)) { |
| 1177 | ret = -EINVAL; |
| 1178 | break; |
| 1179 | } |
| 1180 | ret = rdma_set_reuseaddr(ctx->cm_id, *((int *) optval) ? 1 : 0); |
| 1181 | break; |
Sean Hefty | 6860212 | 2012-06-14 20:31:39 +0000 | [diff] [blame] | 1182 | case RDMA_OPTION_ID_AFONLY: |
| 1183 | if (optlen != sizeof(int)) { |
| 1184 | ret = -EINVAL; |
| 1185 | break; |
| 1186 | } |
| 1187 | ret = rdma_set_afonly(ctx->cm_id, *((int *) optval) ? 1 : 0); |
| 1188 | break; |
Sean Hefty | 7ce8640 | 2007-08-08 15:51:13 -0700 | [diff] [blame] | 1189 | default: |
| 1190 | ret = -ENOSYS; |
| 1191 | } |
| 1192 | |
| 1193 | return ret; |
| 1194 | } |
| 1195 | |
Sean Hefty | a7ca1f0 | 2009-11-16 09:30:33 -0800 | [diff] [blame] | 1196 | static int ucma_set_ib_path(struct ucma_context *ctx, |
| 1197 | struct ib_path_rec_data *path_data, size_t optlen) |
| 1198 | { |
| 1199 | struct ib_sa_path_rec sa_path; |
| 1200 | struct rdma_cm_event event; |
| 1201 | int ret; |
| 1202 | |
| 1203 | if (optlen % sizeof(*path_data)) |
| 1204 | return -EINVAL; |
| 1205 | |
| 1206 | for (; optlen; optlen -= sizeof(*path_data), path_data++) { |
| 1207 | if (path_data->flags == (IB_PATH_GMP | IB_PATH_PRIMARY | |
| 1208 | IB_PATH_BIDIRECTIONAL)) |
| 1209 | break; |
| 1210 | } |
| 1211 | |
| 1212 | if (!optlen) |
| 1213 | return -EINVAL; |
| 1214 | |
Ilya Nelkenbaum | c2be9dc | 2015-02-05 13:53:48 +0200 | [diff] [blame] | 1215 | memset(&sa_path, 0, sizeof(sa_path)); |
Ilya Nelkenbaum | c2be9dc | 2015-02-05 13:53:48 +0200 | [diff] [blame] | 1216 | |
Sean Hefty | a7ca1f0 | 2009-11-16 09:30:33 -0800 | [diff] [blame] | 1217 | ib_sa_unpack_path(path_data->path_rec, &sa_path); |
| 1218 | ret = rdma_set_ib_paths(ctx->cm_id, &sa_path, 1); |
| 1219 | if (ret) |
| 1220 | return ret; |
| 1221 | |
| 1222 | memset(&event, 0, sizeof event); |
| 1223 | event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; |
| 1224 | return ucma_event_handler(ctx->cm_id, &event); |
| 1225 | } |
| 1226 | |
| 1227 | static int ucma_set_option_ib(struct ucma_context *ctx, int optname, |
| 1228 | void *optval, size_t optlen) |
| 1229 | { |
| 1230 | int ret; |
| 1231 | |
| 1232 | switch (optname) { |
| 1233 | case RDMA_OPTION_IB_PATH: |
| 1234 | ret = ucma_set_ib_path(ctx, optval, optlen); |
| 1235 | break; |
| 1236 | default: |
| 1237 | ret = -ENOSYS; |
| 1238 | } |
| 1239 | |
| 1240 | return ret; |
| 1241 | } |
| 1242 | |
Sean Hefty | 7ce8640 | 2007-08-08 15:51:13 -0700 | [diff] [blame] | 1243 | static int ucma_set_option_level(struct ucma_context *ctx, int level, |
| 1244 | int optname, void *optval, size_t optlen) |
| 1245 | { |
| 1246 | int ret; |
| 1247 | |
| 1248 | switch (level) { |
| 1249 | case RDMA_OPTION_ID: |
| 1250 | ret = ucma_set_option_id(ctx, optname, optval, optlen); |
| 1251 | break; |
Sean Hefty | a7ca1f0 | 2009-11-16 09:30:33 -0800 | [diff] [blame] | 1252 | case RDMA_OPTION_IB: |
| 1253 | ret = ucma_set_option_ib(ctx, optname, optval, optlen); |
| 1254 | break; |
Sean Hefty | 7ce8640 | 2007-08-08 15:51:13 -0700 | [diff] [blame] | 1255 | default: |
| 1256 | ret = -ENOSYS; |
| 1257 | } |
| 1258 | |
| 1259 | return ret; |
| 1260 | } |
| 1261 | |
| 1262 | static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf, |
| 1263 | int in_len, int out_len) |
| 1264 | { |
| 1265 | struct rdma_ucm_set_option cmd; |
| 1266 | struct ucma_context *ctx; |
| 1267 | void *optval; |
| 1268 | int ret; |
| 1269 | |
| 1270 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1271 | return -EFAULT; |
| 1272 | |
| 1273 | ctx = ucma_get_ctx(file, cmd.id); |
| 1274 | if (IS_ERR(ctx)) |
| 1275 | return PTR_ERR(ctx); |
| 1276 | |
Roland Dreier | 0764c76 | 2012-07-27 13:27:45 -0700 | [diff] [blame] | 1277 | optval = memdup_user((void __user *) (unsigned long) cmd.optval, |
| 1278 | cmd.optlen); |
| 1279 | if (IS_ERR(optval)) { |
| 1280 | ret = PTR_ERR(optval); |
| 1281 | goto out; |
Sean Hefty | 7ce8640 | 2007-08-08 15:51:13 -0700 | [diff] [blame] | 1282 | } |
| 1283 | |
| 1284 | ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, |
| 1285 | cmd.optlen); |
Sean Hefty | 7ce8640 | 2007-08-08 15:51:13 -0700 | [diff] [blame] | 1286 | kfree(optval); |
Roland Dreier | 0764c76 | 2012-07-27 13:27:45 -0700 | [diff] [blame] | 1287 | |
| 1288 | out: |
Sean Hefty | 7ce8640 | 2007-08-08 15:51:13 -0700 | [diff] [blame] | 1289 | ucma_put_ctx(ctx); |
| 1290 | return ret; |
| 1291 | } |
| 1292 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1293 | static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf, |
| 1294 | int in_len, int out_len) |
| 1295 | { |
| 1296 | struct rdma_ucm_notify cmd; |
| 1297 | struct ucma_context *ctx; |
| 1298 | int ret; |
| 1299 | |
| 1300 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1301 | return -EFAULT; |
| 1302 | |
| 1303 | ctx = ucma_get_ctx(file, cmd.id); |
| 1304 | if (IS_ERR(ctx)) |
| 1305 | return PTR_ERR(ctx); |
| 1306 | |
| 1307 | ret = rdma_notify(ctx->cm_id, (enum ib_event_type) cmd.event); |
| 1308 | ucma_put_ctx(ctx); |
| 1309 | return ret; |
| 1310 | } |
| 1311 | |
Sean Hefty | 5bc2b7b | 2013-05-29 10:09:33 -0700 | [diff] [blame] | 1312 | static ssize_t ucma_process_join(struct ucma_file *file, |
| 1313 | struct rdma_ucm_join_mcast *cmd, int out_len) |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1314 | { |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1315 | struct rdma_ucm_create_id_resp resp; |
| 1316 | struct ucma_context *ctx; |
| 1317 | struct ucma_multicast *mc; |
Sean Hefty | 5bc2b7b | 2013-05-29 10:09:33 -0700 | [diff] [blame] | 1318 | struct sockaddr *addr; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1319 | int ret; |
| 1320 | |
| 1321 | if (out_len < sizeof(resp)) |
| 1322 | return -ENOSPC; |
| 1323 | |
Sean Hefty | 5bc2b7b | 2013-05-29 10:09:33 -0700 | [diff] [blame] | 1324 | addr = (struct sockaddr *) &cmd->addr; |
| 1325 | if (cmd->reserved || !cmd->addr_size || (cmd->addr_size != rdma_addr_size(addr))) |
| 1326 | return -EINVAL; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1327 | |
Sean Hefty | 5bc2b7b | 2013-05-29 10:09:33 -0700 | [diff] [blame] | 1328 | ctx = ucma_get_ctx(file, cmd->id); |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1329 | if (IS_ERR(ctx)) |
| 1330 | return PTR_ERR(ctx); |
| 1331 | |
| 1332 | mutex_lock(&file->mut); |
| 1333 | mc = ucma_alloc_multicast(ctx); |
Julien Brunel | 6aea938 | 2008-10-10 12:00:19 -0700 | [diff] [blame] | 1334 | if (!mc) { |
| 1335 | ret = -ENOMEM; |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1336 | goto err1; |
| 1337 | } |
| 1338 | |
Sean Hefty | 5bc2b7b | 2013-05-29 10:09:33 -0700 | [diff] [blame] | 1339 | mc->uid = cmd->uid; |
| 1340 | memcpy(&mc->addr, addr, cmd->addr_size); |
Roland Dreier | 3f44675 | 2008-08-04 11:02:14 -0700 | [diff] [blame] | 1341 | ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr, mc); |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1342 | if (ret) |
| 1343 | goto err2; |
| 1344 | |
| 1345 | resp.id = mc->id; |
Sean Hefty | 5bc2b7b | 2013-05-29 10:09:33 -0700 | [diff] [blame] | 1346 | if (copy_to_user((void __user *)(unsigned long) cmd->response, |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1347 | &resp, sizeof(resp))) { |
| 1348 | ret = -EFAULT; |
| 1349 | goto err3; |
| 1350 | } |
| 1351 | |
| 1352 | mutex_unlock(&file->mut); |
| 1353 | ucma_put_ctx(ctx); |
| 1354 | return 0; |
| 1355 | |
| 1356 | err3: |
Roland Dreier | 3f44675 | 2008-08-04 11:02:14 -0700 | [diff] [blame] | 1357 | rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr); |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1358 | ucma_cleanup_mc_events(mc); |
| 1359 | err2: |
| 1360 | mutex_lock(&mut); |
| 1361 | idr_remove(&multicast_idr, mc->id); |
| 1362 | mutex_unlock(&mut); |
| 1363 | list_del(&mc->list); |
| 1364 | kfree(mc); |
| 1365 | err1: |
| 1366 | mutex_unlock(&file->mut); |
| 1367 | ucma_put_ctx(ctx); |
| 1368 | return ret; |
| 1369 | } |
| 1370 | |
Sean Hefty | 5bc2b7b | 2013-05-29 10:09:33 -0700 | [diff] [blame] | 1371 | static ssize_t ucma_join_ip_multicast(struct ucma_file *file, |
| 1372 | const char __user *inbuf, |
| 1373 | int in_len, int out_len) |
| 1374 | { |
| 1375 | struct rdma_ucm_join_ip_mcast cmd; |
| 1376 | struct rdma_ucm_join_mcast join_cmd; |
| 1377 | |
| 1378 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1379 | return -EFAULT; |
| 1380 | |
| 1381 | join_cmd.response = cmd.response; |
| 1382 | join_cmd.uid = cmd.uid; |
| 1383 | join_cmd.id = cmd.id; |
| 1384 | join_cmd.addr_size = rdma_addr_size((struct sockaddr *) &cmd.addr); |
| 1385 | join_cmd.reserved = 0; |
| 1386 | memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size); |
| 1387 | |
| 1388 | return ucma_process_join(file, &join_cmd, out_len); |
| 1389 | } |
| 1390 | |
| 1391 | static ssize_t ucma_join_multicast(struct ucma_file *file, |
| 1392 | const char __user *inbuf, |
| 1393 | int in_len, int out_len) |
| 1394 | { |
| 1395 | struct rdma_ucm_join_mcast cmd; |
| 1396 | |
| 1397 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1398 | return -EFAULT; |
| 1399 | |
| 1400 | return ucma_process_join(file, &cmd, out_len); |
| 1401 | } |
| 1402 | |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1403 | static ssize_t ucma_leave_multicast(struct ucma_file *file, |
| 1404 | const char __user *inbuf, |
| 1405 | int in_len, int out_len) |
| 1406 | { |
| 1407 | struct rdma_ucm_destroy_id cmd; |
| 1408 | struct rdma_ucm_destroy_id_resp resp; |
| 1409 | struct ucma_multicast *mc; |
| 1410 | int ret = 0; |
| 1411 | |
| 1412 | if (out_len < sizeof(resp)) |
| 1413 | return -ENOSPC; |
| 1414 | |
| 1415 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1416 | return -EFAULT; |
| 1417 | |
| 1418 | mutex_lock(&mut); |
| 1419 | mc = idr_find(&multicast_idr, cmd.id); |
| 1420 | if (!mc) |
| 1421 | mc = ERR_PTR(-ENOENT); |
| 1422 | else if (mc->ctx->file != file) |
| 1423 | mc = ERR_PTR(-EINVAL); |
Jason Gunthorpe | 7e967fd | 2015-08-04 17:13:32 -0600 | [diff] [blame] | 1424 | else if (!atomic_inc_not_zero(&mc->ctx->ref)) |
| 1425 | mc = ERR_PTR(-ENXIO); |
| 1426 | else |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1427 | idr_remove(&multicast_idr, mc->id); |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1428 | mutex_unlock(&mut); |
| 1429 | |
| 1430 | if (IS_ERR(mc)) { |
| 1431 | ret = PTR_ERR(mc); |
| 1432 | goto out; |
| 1433 | } |
| 1434 | |
Roland Dreier | 3f44675 | 2008-08-04 11:02:14 -0700 | [diff] [blame] | 1435 | rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr); |
Sean Hefty | c8f6a36 | 2007-02-15 17:00:18 -0800 | [diff] [blame] | 1436 | mutex_lock(&mc->ctx->file->mut); |
| 1437 | ucma_cleanup_mc_events(mc); |
| 1438 | list_del(&mc->list); |
| 1439 | mutex_unlock(&mc->ctx->file->mut); |
| 1440 | |
| 1441 | ucma_put_ctx(mc->ctx); |
| 1442 | resp.events_reported = mc->events_reported; |
| 1443 | kfree(mc); |
| 1444 | |
| 1445 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
| 1446 | &resp, sizeof(resp))) |
| 1447 | ret = -EFAULT; |
| 1448 | out: |
| 1449 | return ret; |
| 1450 | } |
| 1451 | |
Sean Hefty | 88314e4 | 2007-11-14 00:29:50 -0800 | [diff] [blame] | 1452 | static void ucma_lock_files(struct ucma_file *file1, struct ucma_file *file2) |
| 1453 | { |
| 1454 | /* Acquire mutex's based on pointer comparison to prevent deadlock. */ |
| 1455 | if (file1 < file2) { |
| 1456 | mutex_lock(&file1->mut); |
Haggai Eran | 31b57b8 | 2015-07-07 17:45:12 +0300 | [diff] [blame] | 1457 | mutex_lock_nested(&file2->mut, SINGLE_DEPTH_NESTING); |
Sean Hefty | 88314e4 | 2007-11-14 00:29:50 -0800 | [diff] [blame] | 1458 | } else { |
| 1459 | mutex_lock(&file2->mut); |
Haggai Eran | 31b57b8 | 2015-07-07 17:45:12 +0300 | [diff] [blame] | 1460 | mutex_lock_nested(&file1->mut, SINGLE_DEPTH_NESTING); |
Sean Hefty | 88314e4 | 2007-11-14 00:29:50 -0800 | [diff] [blame] | 1461 | } |
| 1462 | } |
| 1463 | |
| 1464 | static void ucma_unlock_files(struct ucma_file *file1, struct ucma_file *file2) |
| 1465 | { |
| 1466 | if (file1 < file2) { |
| 1467 | mutex_unlock(&file2->mut); |
| 1468 | mutex_unlock(&file1->mut); |
| 1469 | } else { |
| 1470 | mutex_unlock(&file1->mut); |
| 1471 | mutex_unlock(&file2->mut); |
| 1472 | } |
| 1473 | } |
| 1474 | |
| 1475 | static void ucma_move_events(struct ucma_context *ctx, struct ucma_file *file) |
| 1476 | { |
| 1477 | struct ucma_event *uevent, *tmp; |
| 1478 | |
| 1479 | list_for_each_entry_safe(uevent, tmp, &ctx->file->event_list, list) |
| 1480 | if (uevent->ctx == ctx) |
| 1481 | list_move_tail(&uevent->list, &file->event_list); |
| 1482 | } |
| 1483 | |
| 1484 | static ssize_t ucma_migrate_id(struct ucma_file *new_file, |
| 1485 | const char __user *inbuf, |
| 1486 | int in_len, int out_len) |
| 1487 | { |
| 1488 | struct rdma_ucm_migrate_id cmd; |
| 1489 | struct rdma_ucm_migrate_resp resp; |
| 1490 | struct ucma_context *ctx; |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 1491 | struct fd f; |
Sean Hefty | 88314e4 | 2007-11-14 00:29:50 -0800 | [diff] [blame] | 1492 | struct ucma_file *cur_file; |
| 1493 | int ret = 0; |
| 1494 | |
| 1495 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1496 | return -EFAULT; |
| 1497 | |
| 1498 | /* Get current fd to protect against it being closed */ |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 1499 | f = fdget(cmd.fd); |
| 1500 | if (!f.file) |
Sean Hefty | 88314e4 | 2007-11-14 00:29:50 -0800 | [diff] [blame] | 1501 | return -ENOENT; |
| 1502 | |
| 1503 | /* Validate current fd and prevent destruction of id. */ |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 1504 | ctx = ucma_get_ctx(f.file->private_data, cmd.id); |
Sean Hefty | 88314e4 | 2007-11-14 00:29:50 -0800 | [diff] [blame] | 1505 | if (IS_ERR(ctx)) { |
| 1506 | ret = PTR_ERR(ctx); |
| 1507 | goto file_put; |
| 1508 | } |
| 1509 | |
| 1510 | cur_file = ctx->file; |
| 1511 | if (cur_file == new_file) { |
| 1512 | resp.events_reported = ctx->events_reported; |
| 1513 | goto response; |
| 1514 | } |
| 1515 | |
| 1516 | /* |
| 1517 | * Migrate events between fd's, maintaining order, and avoiding new |
| 1518 | * events being added before existing events. |
| 1519 | */ |
| 1520 | ucma_lock_files(cur_file, new_file); |
| 1521 | mutex_lock(&mut); |
| 1522 | |
| 1523 | list_move_tail(&ctx->list, &new_file->ctx_list); |
| 1524 | ucma_move_events(ctx, new_file); |
| 1525 | ctx->file = new_file; |
| 1526 | resp.events_reported = ctx->events_reported; |
| 1527 | |
| 1528 | mutex_unlock(&mut); |
| 1529 | ucma_unlock_files(cur_file, new_file); |
| 1530 | |
| 1531 | response: |
| 1532 | if (copy_to_user((void __user *)(unsigned long)cmd.response, |
| 1533 | &resp, sizeof(resp))) |
| 1534 | ret = -EFAULT; |
| 1535 | |
| 1536 | ucma_put_ctx(ctx); |
| 1537 | file_put: |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 1538 | fdput(f); |
Sean Hefty | 88314e4 | 2007-11-14 00:29:50 -0800 | [diff] [blame] | 1539 | return ret; |
| 1540 | } |
| 1541 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1542 | static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, |
| 1543 | const char __user *inbuf, |
| 1544 | int in_len, int out_len) = { |
Sean Hefty | 05ad945 | 2013-05-29 10:09:30 -0700 | [diff] [blame] | 1545 | [RDMA_USER_CM_CMD_CREATE_ID] = ucma_create_id, |
| 1546 | [RDMA_USER_CM_CMD_DESTROY_ID] = ucma_destroy_id, |
| 1547 | [RDMA_USER_CM_CMD_BIND_IP] = ucma_bind_ip, |
| 1548 | [RDMA_USER_CM_CMD_RESOLVE_IP] = ucma_resolve_ip, |
| 1549 | [RDMA_USER_CM_CMD_RESOLVE_ROUTE] = ucma_resolve_route, |
| 1550 | [RDMA_USER_CM_CMD_QUERY_ROUTE] = ucma_query_route, |
| 1551 | [RDMA_USER_CM_CMD_CONNECT] = ucma_connect, |
| 1552 | [RDMA_USER_CM_CMD_LISTEN] = ucma_listen, |
| 1553 | [RDMA_USER_CM_CMD_ACCEPT] = ucma_accept, |
| 1554 | [RDMA_USER_CM_CMD_REJECT] = ucma_reject, |
| 1555 | [RDMA_USER_CM_CMD_DISCONNECT] = ucma_disconnect, |
| 1556 | [RDMA_USER_CM_CMD_INIT_QP_ATTR] = ucma_init_qp_attr, |
| 1557 | [RDMA_USER_CM_CMD_GET_EVENT] = ucma_get_event, |
| 1558 | [RDMA_USER_CM_CMD_GET_OPTION] = NULL, |
| 1559 | [RDMA_USER_CM_CMD_SET_OPTION] = ucma_set_option, |
| 1560 | [RDMA_USER_CM_CMD_NOTIFY] = ucma_notify, |
| 1561 | [RDMA_USER_CM_CMD_JOIN_IP_MCAST] = ucma_join_ip_multicast, |
| 1562 | [RDMA_USER_CM_CMD_LEAVE_MCAST] = ucma_leave_multicast, |
| 1563 | [RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id, |
Sean Hefty | eebe4c3 | 2013-05-29 10:09:31 -0700 | [diff] [blame] | 1564 | [RDMA_USER_CM_CMD_QUERY] = ucma_query, |
Sean Hefty | 209cf2a | 2013-05-29 10:09:32 -0700 | [diff] [blame] | 1565 | [RDMA_USER_CM_CMD_BIND] = ucma_bind, |
Sean Hefty | 5bc2b7b | 2013-05-29 10:09:33 -0700 | [diff] [blame] | 1566 | [RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, |
| 1567 | [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1568 | }; |
| 1569 | |
| 1570 | static ssize_t ucma_write(struct file *filp, const char __user *buf, |
| 1571 | size_t len, loff_t *pos) |
| 1572 | { |
| 1573 | struct ucma_file *file = filp->private_data; |
| 1574 | struct rdma_ucm_cmd_hdr hdr; |
| 1575 | ssize_t ret; |
| 1576 | |
Jason Gunthorpe | e6bd18f | 2016-04-10 19:13:13 -0600 | [diff] [blame] | 1577 | if (WARN_ON_ONCE(!ib_safe_file_access(filp))) |
| 1578 | return -EACCES; |
| 1579 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1580 | if (len < sizeof(hdr)) |
| 1581 | return -EINVAL; |
| 1582 | |
| 1583 | if (copy_from_user(&hdr, buf, sizeof(hdr))) |
| 1584 | return -EFAULT; |
| 1585 | |
Hefty, Sean | caf6e3f | 2011-10-06 09:33:05 -0700 | [diff] [blame] | 1586 | if (hdr.cmd >= ARRAY_SIZE(ucma_cmd_table)) |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1587 | return -EINVAL; |
| 1588 | |
| 1589 | if (hdr.in + sizeof(hdr) > len) |
| 1590 | return -EINVAL; |
| 1591 | |
| 1592 | if (!ucma_cmd_table[hdr.cmd]) |
| 1593 | return -ENOSYS; |
| 1594 | |
| 1595 | ret = ucma_cmd_table[hdr.cmd](file, buf + sizeof(hdr), hdr.in, hdr.out); |
| 1596 | if (!ret) |
| 1597 | ret = len; |
| 1598 | |
| 1599 | return ret; |
| 1600 | } |
| 1601 | |
| 1602 | static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait) |
| 1603 | { |
| 1604 | struct ucma_file *file = filp->private_data; |
| 1605 | unsigned int mask = 0; |
| 1606 | |
| 1607 | poll_wait(filp, &file->poll_wait, wait); |
| 1608 | |
| 1609 | if (!list_empty(&file->event_list)) |
| 1610 | mask = POLLIN | POLLRDNORM; |
| 1611 | |
| 1612 | return mask; |
| 1613 | } |
| 1614 | |
Roland Dreier | f7a6117 | 2008-07-24 20:36:59 -0700 | [diff] [blame] | 1615 | /* |
| 1616 | * ucma_open() does not need the BKL: |
| 1617 | * |
| 1618 | * - no global state is referred to; |
| 1619 | * - there is no ioctl method to race against; |
| 1620 | * - no further module initialization is required for open to work |
| 1621 | * after the device is registered. |
| 1622 | */ |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1623 | static int ucma_open(struct inode *inode, struct file *filp) |
| 1624 | { |
| 1625 | struct ucma_file *file; |
| 1626 | |
| 1627 | file = kmalloc(sizeof *file, GFP_KERNEL); |
| 1628 | if (!file) |
| 1629 | return -ENOMEM; |
| 1630 | |
Sasha Levin | 0174b38 | 2015-09-17 16:04:19 -0400 | [diff] [blame] | 1631 | file->close_wq = create_singlethread_workqueue("ucma_close_id"); |
| 1632 | if (!file->close_wq) { |
| 1633 | kfree(file); |
| 1634 | return -ENOMEM; |
| 1635 | } |
| 1636 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1637 | INIT_LIST_HEAD(&file->event_list); |
| 1638 | INIT_LIST_HEAD(&file->ctx_list); |
| 1639 | init_waitqueue_head(&file->poll_wait); |
| 1640 | mutex_init(&file->mut); |
| 1641 | |
| 1642 | filp->private_data = file; |
| 1643 | file->filp = filp; |
Roland Dreier | bc1db9a | 2010-04-09 17:13:50 -0700 | [diff] [blame] | 1644 | |
| 1645 | return nonseekable_open(inode, filp); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1646 | } |
| 1647 | |
| 1648 | static int ucma_close(struct inode *inode, struct file *filp) |
| 1649 | { |
| 1650 | struct ucma_file *file = filp->private_data; |
| 1651 | struct ucma_context *ctx, *tmp; |
| 1652 | |
| 1653 | mutex_lock(&file->mut); |
| 1654 | list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) { |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 1655 | ctx->destroying = 1; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1656 | mutex_unlock(&file->mut); |
| 1657 | |
| 1658 | mutex_lock(&mut); |
| 1659 | idr_remove(&ctx_idr, ctx->id); |
| 1660 | mutex_unlock(&mut); |
| 1661 | |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 1662 | flush_workqueue(file->close_wq); |
| 1663 | /* At that step once ctx was marked as destroying and workqueue |
| 1664 | * was flushed we are safe from any inflights handlers that |
| 1665 | * might put other closing task. |
| 1666 | */ |
| 1667 | mutex_lock(&mut); |
| 1668 | if (!ctx->closing) { |
| 1669 | mutex_unlock(&mut); |
| 1670 | /* rdma_destroy_id ensures that no event handlers are |
| 1671 | * inflight for that id before releasing it. |
| 1672 | */ |
| 1673 | rdma_destroy_id(ctx->cm_id); |
| 1674 | } else { |
| 1675 | mutex_unlock(&mut); |
| 1676 | } |
| 1677 | |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1678 | ucma_free_ctx(ctx); |
| 1679 | mutex_lock(&file->mut); |
| 1680 | } |
| 1681 | mutex_unlock(&file->mut); |
Yishai Hadas | e1c3029 | 2015-08-13 18:32:07 +0300 | [diff] [blame] | 1682 | destroy_workqueue(file->close_wq); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1683 | kfree(file); |
| 1684 | return 0; |
| 1685 | } |
| 1686 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 1687 | static const struct file_operations ucma_fops = { |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1688 | .owner = THIS_MODULE, |
| 1689 | .open = ucma_open, |
| 1690 | .release = ucma_close, |
| 1691 | .write = ucma_write, |
| 1692 | .poll = ucma_poll, |
Roland Dreier | bc1db9a | 2010-04-09 17:13:50 -0700 | [diff] [blame] | 1693 | .llseek = no_llseek, |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1694 | }; |
| 1695 | |
| 1696 | static struct miscdevice ucma_misc = { |
Roland Dreier | 04ea2f8 | 2011-05-23 10:48:43 -0700 | [diff] [blame] | 1697 | .minor = MISC_DYNAMIC_MINOR, |
| 1698 | .name = "rdma_cm", |
| 1699 | .nodename = "infiniband/rdma_cm", |
| 1700 | .mode = 0666, |
| 1701 | .fops = &ucma_fops, |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1702 | }; |
| 1703 | |
| 1704 | static ssize_t show_abi_version(struct device *dev, |
| 1705 | struct device_attribute *attr, |
| 1706 | char *buf) |
| 1707 | { |
| 1708 | return sprintf(buf, "%d\n", RDMA_USER_CM_ABI_VERSION); |
| 1709 | } |
| 1710 | static DEVICE_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); |
| 1711 | |
| 1712 | static int __init ucma_init(void) |
| 1713 | { |
| 1714 | int ret; |
| 1715 | |
| 1716 | ret = misc_register(&ucma_misc); |
| 1717 | if (ret) |
| 1718 | return ret; |
| 1719 | |
| 1720 | ret = device_create_file(ucma_misc.this_device, &dev_attr_abi_version); |
| 1721 | if (ret) { |
Parav Pandit | aba25a3e | 2016-03-02 00:50:29 +0530 | [diff] [blame] | 1722 | pr_err("rdma_ucm: couldn't create abi_version attr\n"); |
Steve Wise | 97cb7e4 | 2010-08-13 20:56:34 +0000 | [diff] [blame] | 1723 | goto err1; |
| 1724 | } |
| 1725 | |
Eric W. Biederman | ec8f23c | 2012-04-19 13:44:49 +0000 | [diff] [blame] | 1726 | ucma_ctl_table_hdr = register_net_sysctl(&init_net, "net/rdma_ucm", ucma_ctl_table); |
Steve Wise | 97cb7e4 | 2010-08-13 20:56:34 +0000 | [diff] [blame] | 1727 | if (!ucma_ctl_table_hdr) { |
Parav Pandit | aba25a3e | 2016-03-02 00:50:29 +0530 | [diff] [blame] | 1728 | pr_err("rdma_ucm: couldn't register sysctl paths\n"); |
Steve Wise | 97cb7e4 | 2010-08-13 20:56:34 +0000 | [diff] [blame] | 1729 | ret = -ENOMEM; |
| 1730 | goto err2; |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1731 | } |
| 1732 | return 0; |
Steve Wise | 97cb7e4 | 2010-08-13 20:56:34 +0000 | [diff] [blame] | 1733 | err2: |
| 1734 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
| 1735 | err1: |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1736 | misc_deregister(&ucma_misc); |
| 1737 | return ret; |
| 1738 | } |
| 1739 | |
| 1740 | static void __exit ucma_cleanup(void) |
| 1741 | { |
Eric W. Biederman | 5dd3df1 | 2012-04-19 13:24:33 +0000 | [diff] [blame] | 1742 | unregister_net_sysctl_table(ucma_ctl_table_hdr); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1743 | device_remove_file(ucma_misc.this_device, &dev_attr_abi_version); |
| 1744 | misc_deregister(&ucma_misc); |
| 1745 | idr_destroy(&ctx_idr); |
Johannes Thumshirn | 45d2542 | 2015-07-08 17:21:15 +0200 | [diff] [blame] | 1746 | idr_destroy(&multicast_idr); |
Sean Hefty | 7521663 | 2006-11-30 16:53:41 -0800 | [diff] [blame] | 1747 | } |
| 1748 | |
| 1749 | module_init(ucma_init); |
| 1750 | module_exit(ucma_cleanup); |