Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005 Topspin Communications. All rights reserved. |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 3 | * Copyright (c) 2005 Intel Corporation. All rights reserved. |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the |
| 9 | * OpenIB.org BSD license below: |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or |
| 12 | * without modification, are permitted provided that the following |
| 13 | * conditions are met: |
| 14 | * |
| 15 | * - Redistributions of source code must retain the above |
| 16 | * copyright notice, this list of conditions and the following |
| 17 | * disclaimer. |
| 18 | * |
| 19 | * - Redistributions in binary form must reproduce the above |
| 20 | * copyright notice, this list of conditions and the following |
| 21 | * disclaimer in the documentation and/or other materials |
| 22 | * provided with the distribution. |
| 23 | * |
| 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 31 | * SOFTWARE. |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 32 | */ |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 33 | |
| 34 | #include <linux/completion.h> |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 35 | #include <linux/init.h> |
| 36 | #include <linux/fs.h> |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/device.h> |
| 39 | #include <linux/err.h> |
| 40 | #include <linux/poll.h> |
Alexey Dobriyan | a99bbaf | 2009-10-04 16:11:37 +0400 | [diff] [blame] | 41 | #include <linux/sched.h> |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 42 | #include <linux/file.h> |
| 43 | #include <linux/mount.h> |
| 44 | #include <linux/cdev.h> |
Sean Hefty | 595e726 | 2005-10-17 15:33:47 -0700 | [diff] [blame] | 45 | #include <linux/idr.h> |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 46 | #include <linux/mutex.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 47 | #include <linux/slab.h> |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 48 | |
Linus Torvalds | 7c0f6ba | 2016-12-24 11:46:01 -0800 | [diff] [blame] | 49 | #include <linux/uaccess.h> |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 50 | |
Jason Gunthorpe | e6bd18f | 2016-04-10 19:13:13 -0600 | [diff] [blame] | 51 | #include <rdma/ib.h> |
Sean Hefty | 595e726 | 2005-10-17 15:33:47 -0700 | [diff] [blame] | 52 | #include <rdma/ib_cm.h> |
| 53 | #include <rdma/ib_user_cm.h> |
Sean Hefty | 6a9af2e | 2006-06-17 20:37:27 -0700 | [diff] [blame] | 54 | #include <rdma/ib_marshall.h> |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 55 | |
Huy Nguyen | 8cf12d7 | 2018-01-08 12:15:38 +0200 | [diff] [blame] | 56 | #include "core_priv.h" |
| 57 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 58 | MODULE_AUTHOR("Libor Michalek"); |
| 59 | MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access"); |
| 60 | MODULE_LICENSE("Dual BSD/GPL"); |
| 61 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 62 | struct ib_ucm_device { |
| 63 | int devnum; |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 64 | struct cdev cdev; |
| 65 | struct device dev; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 66 | struct ib_device *ib_dev; |
| 67 | }; |
| 68 | |
Sean Hefty | 595e726 | 2005-10-17 15:33:47 -0700 | [diff] [blame] | 69 | struct ib_ucm_file { |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 70 | struct mutex file_mutex; |
Sean Hefty | 595e726 | 2005-10-17 15:33:47 -0700 | [diff] [blame] | 71 | struct file *filp; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 72 | struct ib_ucm_device *device; |
Hal Rosenstock | 79d8190 | 2005-07-27 20:38:56 -0700 | [diff] [blame] | 73 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 74 | struct list_head ctxs; |
| 75 | struct list_head events; |
Sean Hefty | 595e726 | 2005-10-17 15:33:47 -0700 | [diff] [blame] | 76 | wait_queue_head_t poll_wait; |
| 77 | }; |
| 78 | |
| 79 | struct ib_ucm_context { |
| 80 | int id; |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 81 | struct completion comp; |
Sean Hefty | 595e726 | 2005-10-17 15:33:47 -0700 | [diff] [blame] | 82 | atomic_t ref; |
| 83 | int events_reported; |
| 84 | |
| 85 | struct ib_ucm_file *file; |
| 86 | struct ib_cm_id *cm_id; |
| 87 | __u64 uid; |
| 88 | |
| 89 | struct list_head events; /* list of pending events. */ |
| 90 | struct list_head file_list; /* member in file ctx list */ |
| 91 | }; |
| 92 | |
| 93 | struct ib_ucm_event { |
| 94 | struct ib_ucm_context *ctx; |
| 95 | struct list_head file_list; /* member in file event list */ |
| 96 | struct list_head ctx_list; /* member in ctx event list */ |
| 97 | |
| 98 | struct ib_cm_id *cm_id; |
| 99 | struct ib_ucm_event_resp resp; |
| 100 | void *data; |
| 101 | void *info; |
| 102 | int data_len; |
| 103 | int info_len; |
| 104 | }; |
Hal Rosenstock | 79d8190 | 2005-07-27 20:38:56 -0700 | [diff] [blame] | 105 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 106 | enum { |
| 107 | IB_UCM_MAJOR = 231, |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 108 | IB_UCM_BASE_MINOR = 224, |
Huy Nguyen | 8cf12d7 | 2018-01-08 12:15:38 +0200 | [diff] [blame] | 109 | IB_UCM_MAX_DEVICES = RDMA_MAX_PORTS, |
| 110 | IB_UCM_NUM_FIXED_MINOR = 32, |
| 111 | IB_UCM_NUM_DYNAMIC_MINOR = IB_UCM_MAX_DEVICES - IB_UCM_NUM_FIXED_MINOR, |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 112 | }; |
| 113 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 114 | #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR) |
Huy Nguyen | 8cf12d7 | 2018-01-08 12:15:38 +0200 | [diff] [blame] | 115 | static dev_t dynamic_ucm_dev; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 116 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 117 | static void ib_ucm_add_one(struct ib_device *device); |
Haggai Eran | 7c1eb45 | 2015-07-30 17:50:14 +0300 | [diff] [blame] | 118 | static void ib_ucm_remove_one(struct ib_device *device, void *client_data); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 119 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 120 | static struct ib_client ucm_client = { |
| 121 | .name = "ucm", |
| 122 | .add = ib_ucm_add_one, |
| 123 | .remove = ib_ucm_remove_one |
| 124 | }; |
| 125 | |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 126 | static DEFINE_MUTEX(ctx_id_mutex); |
Roland Dreier | 762a03e | 2005-10-17 15:38:50 -0700 | [diff] [blame] | 127 | static DEFINE_IDR(ctx_id_table); |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 128 | static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES); |
Sean Hefty | 595e726 | 2005-10-17 15:33:47 -0700 | [diff] [blame] | 129 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 130 | static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id) |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 131 | { |
| 132 | struct ib_ucm_context *ctx; |
| 133 | |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 134 | mutex_lock(&ctx_id_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 135 | ctx = idr_find(&ctx_id_table, id); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 136 | if (!ctx) |
| 137 | ctx = ERR_PTR(-ENOENT); |
| 138 | else if (ctx->file != file) |
| 139 | ctx = ERR_PTR(-EINVAL); |
| 140 | else |
| 141 | atomic_inc(&ctx->ref); |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 142 | mutex_unlock(&ctx_id_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 143 | |
| 144 | return ctx; |
| 145 | } |
| 146 | |
| 147 | static void ib_ucm_ctx_put(struct ib_ucm_context *ctx) |
| 148 | { |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 149 | if (atomic_dec_and_test(&ctx->ref)) |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 150 | complete(&ctx->comp); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 151 | } |
| 152 | |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 153 | static inline int ib_ucm_new_cm_id(int event) |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 154 | { |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 155 | return event == IB_CM_REQ_RECEIVED || event == IB_CM_SIDR_REQ_RECEIVED; |
| 156 | } |
| 157 | |
| 158 | static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) |
| 159 | { |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 160 | struct ib_ucm_event *uevent; |
| 161 | |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 162 | mutex_lock(&ctx->file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 163 | list_del(&ctx->file_list); |
| 164 | while (!list_empty(&ctx->events)) { |
| 165 | |
| 166 | uevent = list_entry(ctx->events.next, |
| 167 | struct ib_ucm_event, ctx_list); |
| 168 | list_del(&uevent->file_list); |
| 169 | list_del(&uevent->ctx_list); |
Michael S. Tsirkin | f469b26 | 2006-11-29 15:33:10 -0800 | [diff] [blame] | 170 | mutex_unlock(&ctx->file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 171 | |
| 172 | /* clear incoming connections. */ |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 173 | if (ib_ucm_new_cm_id(uevent->resp.event)) |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 174 | ib_destroy_cm_id(uevent->cm_id); |
| 175 | |
| 176 | kfree(uevent); |
Michael S. Tsirkin | f469b26 | 2006-11-29 15:33:10 -0800 | [diff] [blame] | 177 | mutex_lock(&ctx->file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 178 | } |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 179 | mutex_unlock(&ctx->file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file) |
| 183 | { |
| 184 | struct ib_ucm_context *ctx; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 185 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 186 | ctx = kzalloc(sizeof *ctx, GFP_KERNEL); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 187 | if (!ctx) |
| 188 | return NULL; |
| 189 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 190 | atomic_set(&ctx->ref, 1); |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 191 | init_completion(&ctx->comp); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 192 | ctx->file = file; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 193 | INIT_LIST_HEAD(&ctx->events); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 194 | |
Tejun Heo | 3b069c5 | 2013-02-27 17:04:16 -0800 | [diff] [blame] | 195 | mutex_lock(&ctx_id_mutex); |
| 196 | ctx->id = idr_alloc(&ctx_id_table, ctx, 0, 0, GFP_KERNEL); |
| 197 | mutex_unlock(&ctx_id_mutex); |
| 198 | if (ctx->id < 0) |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 199 | goto error; |
| 200 | |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 201 | list_add_tail(&ctx->file_list, &file->ctxs); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 202 | return ctx; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 203 | |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 204 | error: |
| 205 | kfree(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 206 | return NULL; |
| 207 | } |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 208 | |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 209 | static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq, |
Jason Gunthorpe | 486edfb | 2018-08-13 20:04:37 -0600 | [diff] [blame] | 210 | const struct ib_cm_req_event_param *kreq) |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 211 | { |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 212 | ureq->remote_ca_guid = kreq->remote_ca_guid; |
| 213 | ureq->remote_qkey = kreq->remote_qkey; |
| 214 | ureq->remote_qpn = kreq->remote_qpn; |
| 215 | ureq->qp_type = kreq->qp_type; |
| 216 | ureq->starting_psn = kreq->starting_psn; |
| 217 | ureq->responder_resources = kreq->responder_resources; |
| 218 | ureq->initiator_depth = kreq->initiator_depth; |
| 219 | ureq->local_cm_response_timeout = kreq->local_cm_response_timeout; |
| 220 | ureq->flow_control = kreq->flow_control; |
| 221 | ureq->remote_cm_response_timeout = kreq->remote_cm_response_timeout; |
| 222 | ureq->retry_count = kreq->retry_count; |
| 223 | ureq->rnr_retry_count = kreq->rnr_retry_count; |
| 224 | ureq->srq = kreq->srq; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 225 | ureq->port = kreq->port; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 226 | |
Sean Hefty | 6a9af2e | 2006-06-17 20:37:27 -0700 | [diff] [blame] | 227 | ib_copy_path_rec_to_user(&ureq->primary_path, kreq->primary_path); |
| 228 | if (kreq->alternate_path) |
| 229 | ib_copy_path_rec_to_user(&ureq->alternate_path, |
| 230 | kreq->alternate_path); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep, |
Jason Gunthorpe | 486edfb | 2018-08-13 20:04:37 -0600 | [diff] [blame] | 234 | const struct ib_cm_rep_event_param *krep) |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 235 | { |
| 236 | urep->remote_ca_guid = krep->remote_ca_guid; |
| 237 | urep->remote_qkey = krep->remote_qkey; |
| 238 | urep->remote_qpn = krep->remote_qpn; |
| 239 | urep->starting_psn = krep->starting_psn; |
| 240 | urep->responder_resources = krep->responder_resources; |
| 241 | urep->initiator_depth = krep->initiator_depth; |
| 242 | urep->target_ack_delay = krep->target_ack_delay; |
| 243 | urep->failover_accepted = krep->failover_accepted; |
| 244 | urep->flow_control = krep->flow_control; |
| 245 | urep->rnr_retry_count = krep->rnr_retry_count; |
| 246 | urep->srq = krep->srq; |
| 247 | } |
| 248 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 249 | static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep, |
Jason Gunthorpe | 486edfb | 2018-08-13 20:04:37 -0600 | [diff] [blame] | 250 | const struct ib_cm_sidr_rep_event_param *krep) |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 251 | { |
| 252 | urep->status = krep->status; |
| 253 | urep->qkey = krep->qkey; |
| 254 | urep->qpn = krep->qpn; |
| 255 | }; |
| 256 | |
Jason Gunthorpe | 486edfb | 2018-08-13 20:04:37 -0600 | [diff] [blame] | 257 | static int ib_ucm_event_process(const struct ib_cm_event *evt, |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 258 | struct ib_ucm_event *uvt) |
| 259 | { |
| 260 | void *info = NULL; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 261 | |
| 262 | switch (evt->event) { |
| 263 | case IB_CM_REQ_RECEIVED: |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 264 | ib_ucm_event_req_get(&uvt->resp.u.req_resp, |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 265 | &evt->param.req_rcvd); |
| 266 | uvt->data_len = IB_CM_REQ_PRIVATE_DATA_SIZE; |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 267 | uvt->resp.present = IB_UCM_PRES_PRIMARY; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 268 | uvt->resp.present |= (evt->param.req_rcvd.alternate_path ? |
| 269 | IB_UCM_PRES_ALTERNATE : 0); |
| 270 | break; |
| 271 | case IB_CM_REP_RECEIVED: |
| 272 | ib_ucm_event_rep_get(&uvt->resp.u.rep_resp, |
| 273 | &evt->param.rep_rcvd); |
| 274 | uvt->data_len = IB_CM_REP_PRIVATE_DATA_SIZE; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 275 | break; |
| 276 | case IB_CM_RTU_RECEIVED: |
| 277 | uvt->data_len = IB_CM_RTU_PRIVATE_DATA_SIZE; |
| 278 | uvt->resp.u.send_status = evt->param.send_status; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 279 | break; |
| 280 | case IB_CM_DREQ_RECEIVED: |
| 281 | uvt->data_len = IB_CM_DREQ_PRIVATE_DATA_SIZE; |
| 282 | uvt->resp.u.send_status = evt->param.send_status; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 283 | break; |
| 284 | case IB_CM_DREP_RECEIVED: |
| 285 | uvt->data_len = IB_CM_DREP_PRIVATE_DATA_SIZE; |
| 286 | uvt->resp.u.send_status = evt->param.send_status; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 287 | break; |
| 288 | case IB_CM_MRA_RECEIVED: |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 289 | uvt->resp.u.mra_resp.timeout = |
| 290 | evt->param.mra_rcvd.service_timeout; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 291 | uvt->data_len = IB_CM_MRA_PRIVATE_DATA_SIZE; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 292 | break; |
| 293 | case IB_CM_REJ_RECEIVED: |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 294 | uvt->resp.u.rej_resp.reason = evt->param.rej_rcvd.reason; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 295 | uvt->data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; |
| 296 | uvt->info_len = evt->param.rej_rcvd.ari_length; |
| 297 | info = evt->param.rej_rcvd.ari; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 298 | break; |
| 299 | case IB_CM_LAP_RECEIVED: |
Sean Hefty | 6a9af2e | 2006-06-17 20:37:27 -0700 | [diff] [blame] | 300 | ib_copy_path_rec_to_user(&uvt->resp.u.lap_resp.path, |
| 301 | evt->param.lap_rcvd.alternate_path); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 302 | uvt->data_len = IB_CM_LAP_PRIVATE_DATA_SIZE; |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 303 | uvt->resp.present = IB_UCM_PRES_ALTERNATE; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 304 | break; |
| 305 | case IB_CM_APR_RECEIVED: |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 306 | uvt->resp.u.apr_resp.status = evt->param.apr_rcvd.ap_status; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 307 | uvt->data_len = IB_CM_APR_PRIVATE_DATA_SIZE; |
| 308 | uvt->info_len = evt->param.apr_rcvd.info_len; |
| 309 | info = evt->param.apr_rcvd.apr_info; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 310 | break; |
| 311 | case IB_CM_SIDR_REQ_RECEIVED: |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 312 | uvt->resp.u.sidr_req_resp.pkey = |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 313 | evt->param.sidr_req_rcvd.pkey; |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 314 | uvt->resp.u.sidr_req_resp.port = |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 315 | evt->param.sidr_req_rcvd.port; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 316 | uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 317 | break; |
| 318 | case IB_CM_SIDR_REP_RECEIVED: |
| 319 | ib_ucm_event_sidr_rep_get(&uvt->resp.u.sidr_rep_resp, |
| 320 | &evt->param.sidr_rep_rcvd); |
| 321 | uvt->data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; |
| 322 | uvt->info_len = evt->param.sidr_rep_rcvd.info_len; |
| 323 | info = evt->param.sidr_rep_rcvd.info; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 324 | break; |
| 325 | default: |
| 326 | uvt->resp.u.send_status = evt->param.send_status; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 327 | break; |
| 328 | } |
| 329 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 330 | if (uvt->data_len) { |
Eric Sesterhenn | bed8bdf | 2006-10-23 22:17:21 +0200 | [diff] [blame] | 331 | uvt->data = kmemdup(evt->private_data, uvt->data_len, GFP_KERNEL); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 332 | if (!uvt->data) |
| 333 | goto err1; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 334 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 335 | uvt->resp.present |= IB_UCM_PRES_DATA; |
| 336 | } |
| 337 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 338 | if (uvt->info_len) { |
Eric Sesterhenn | bed8bdf | 2006-10-23 22:17:21 +0200 | [diff] [blame] | 339 | uvt->info = kmemdup(info, uvt->info_len, GFP_KERNEL); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 340 | if (!uvt->info) |
| 341 | goto err2; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 342 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 343 | uvt->resp.present |= IB_UCM_PRES_INFO; |
| 344 | } |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 345 | return 0; |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 346 | |
| 347 | err2: |
Hal Rosenstock | 79d8190 | 2005-07-27 20:38:56 -0700 | [diff] [blame] | 348 | kfree(uvt->data); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 349 | err1: |
| 350 | return -ENOMEM; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 351 | } |
| 352 | |
| 353 | static int ib_ucm_event_handler(struct ib_cm_id *cm_id, |
Jason Gunthorpe | 486edfb | 2018-08-13 20:04:37 -0600 | [diff] [blame] | 354 | const struct ib_cm_event *event) |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 355 | { |
| 356 | struct ib_ucm_event *uevent; |
| 357 | struct ib_ucm_context *ctx; |
| 358 | int result = 0; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 359 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 360 | ctx = cm_id->context; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 361 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 362 | uevent = kzalloc(sizeof *uevent, GFP_KERNEL); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 363 | if (!uevent) |
| 364 | goto err1; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 365 | |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 366 | uevent->ctx = ctx; |
| 367 | uevent->cm_id = cm_id; |
| 368 | uevent->resp.uid = ctx->uid; |
| 369 | uevent->resp.id = ctx->id; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 370 | uevent->resp.event = event->event; |
| 371 | |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 372 | result = ib_ucm_event_process(event, uevent); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 373 | if (result) |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 374 | goto err2; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 375 | |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 376 | mutex_lock(&ctx->file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 377 | list_add_tail(&uevent->file_list, &ctx->file->events); |
| 378 | list_add_tail(&uevent->ctx_list, &ctx->events); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 379 | wake_up_interruptible(&ctx->file->poll_wait); |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 380 | mutex_unlock(&ctx->file->file_mutex); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 381 | return 0; |
| 382 | |
| 383 | err2: |
| 384 | kfree(uevent); |
| 385 | err1: |
| 386 | /* Destroy new cm_id's */ |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 387 | return ib_ucm_new_cm_id(event->event); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 388 | } |
| 389 | |
| 390 | static ssize_t ib_ucm_event(struct ib_ucm_file *file, |
| 391 | const char __user *inbuf, |
| 392 | int in_len, int out_len) |
| 393 | { |
| 394 | struct ib_ucm_context *ctx; |
| 395 | struct ib_ucm_event_get cmd; |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 396 | struct ib_ucm_event *uevent; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 397 | int result = 0; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 398 | |
| 399 | if (out_len < sizeof(struct ib_ucm_event_resp)) |
| 400 | return -ENOSPC; |
| 401 | |
| 402 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 403 | return -EFAULT; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 404 | |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 405 | mutex_lock(&file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 406 | while (list_empty(&file->events)) { |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 407 | mutex_unlock(&file->file_mutex); |
Sean Hefty | 9d41b7f | 2007-04-05 10:51:05 -0700 | [diff] [blame] | 408 | |
| 409 | if (file->filp->f_flags & O_NONBLOCK) |
| 410 | return -EAGAIN; |
| 411 | |
| 412 | if (wait_event_interruptible(file->poll_wait, |
| 413 | !list_empty(&file->events))) |
| 414 | return -ERESTARTSYS; |
| 415 | |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 416 | mutex_lock(&file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 417 | } |
| 418 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 419 | uevent = list_entry(file->events.next, struct ib_ucm_event, file_list); |
| 420 | |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 421 | if (ib_ucm_new_cm_id(uevent->resp.event)) { |
| 422 | ctx = ib_ucm_ctx_alloc(file); |
| 423 | if (!ctx) { |
| 424 | result = -ENOMEM; |
| 425 | goto done; |
| 426 | } |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 427 | |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 428 | ctx->cm_id = uevent->cm_id; |
| 429 | ctx->cm_id->context = ctx; |
| 430 | uevent->resp.id = ctx->id; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 431 | } |
| 432 | |
Jason Gunthorpe | 6f57c93 | 2018-03-27 14:18:47 -0600 | [diff] [blame] | 433 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 434 | &uevent->resp, sizeof(uevent->resp))) { |
| 435 | result = -EFAULT; |
| 436 | goto done; |
| 437 | } |
| 438 | |
| 439 | if (uevent->data) { |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 440 | if (cmd.data_len < uevent->data_len) { |
| 441 | result = -ENOMEM; |
| 442 | goto done; |
| 443 | } |
Jason Gunthorpe | 6f57c93 | 2018-03-27 14:18:47 -0600 | [diff] [blame] | 444 | if (copy_to_user(u64_to_user_ptr(cmd.data), |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 445 | uevent->data, uevent->data_len)) { |
| 446 | result = -EFAULT; |
| 447 | goto done; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | if (uevent->info) { |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 452 | if (cmd.info_len < uevent->info_len) { |
| 453 | result = -ENOMEM; |
| 454 | goto done; |
| 455 | } |
Jason Gunthorpe | 6f57c93 | 2018-03-27 14:18:47 -0600 | [diff] [blame] | 456 | if (copy_to_user(u64_to_user_ptr(cmd.info), |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 457 | uevent->info, uevent->info_len)) { |
| 458 | result = -EFAULT; |
| 459 | goto done; |
| 460 | } |
| 461 | } |
| 462 | |
| 463 | list_del(&uevent->file_list); |
| 464 | list_del(&uevent->ctx_list); |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 465 | uevent->ctx->events_reported++; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 466 | |
Hal Rosenstock | 79d8190 | 2005-07-27 20:38:56 -0700 | [diff] [blame] | 467 | kfree(uevent->data); |
| 468 | kfree(uevent->info); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 469 | kfree(uevent); |
| 470 | done: |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 471 | mutex_unlock(&file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 472 | return result; |
| 473 | } |
| 474 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 475 | static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, |
| 476 | const char __user *inbuf, |
| 477 | int in_len, int out_len) |
| 478 | { |
| 479 | struct ib_ucm_create_id cmd; |
| 480 | struct ib_ucm_create_id_resp resp; |
| 481 | struct ib_ucm_context *ctx; |
| 482 | int result; |
| 483 | |
| 484 | if (out_len < sizeof(resp)) |
| 485 | return -ENOSPC; |
| 486 | |
| 487 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 488 | return -EFAULT; |
| 489 | |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 490 | mutex_lock(&file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 491 | ctx = ib_ucm_ctx_alloc(file); |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 492 | mutex_unlock(&file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 493 | if (!ctx) |
| 494 | return -ENOMEM; |
| 495 | |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 496 | ctx->uid = cmd.uid; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 497 | ctx->cm_id = ib_create_cm_id(file->device->ib_dev, |
| 498 | ib_ucm_event_handler, ctx); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 499 | if (IS_ERR(ctx->cm_id)) { |
| 500 | result = PTR_ERR(ctx->cm_id); |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 501 | goto err1; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 502 | } |
| 503 | |
| 504 | resp.id = ctx->id; |
Jason Gunthorpe | 6f57c93 | 2018-03-27 14:18:47 -0600 | [diff] [blame] | 505 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 506 | &resp, sizeof(resp))) { |
| 507 | result = -EFAULT; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 508 | goto err2; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 509 | } |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 510 | return 0; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 511 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 512 | err2: |
| 513 | ib_destroy_cm_id(ctx->cm_id); |
| 514 | err1: |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 515 | mutex_lock(&ctx_id_mutex); |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 516 | idr_remove(&ctx_id_table, ctx->id); |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 517 | mutex_unlock(&ctx_id_mutex); |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 518 | kfree(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 519 | return result; |
| 520 | } |
| 521 | |
| 522 | static ssize_t ib_ucm_destroy_id(struct ib_ucm_file *file, |
| 523 | const char __user *inbuf, |
| 524 | int in_len, int out_len) |
| 525 | { |
| 526 | struct ib_ucm_destroy_id cmd; |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 527 | struct ib_ucm_destroy_id_resp resp; |
| 528 | struct ib_ucm_context *ctx; |
| 529 | int result = 0; |
| 530 | |
| 531 | if (out_len < sizeof(resp)) |
| 532 | return -ENOSPC; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 533 | |
| 534 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 535 | return -EFAULT; |
| 536 | |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 537 | mutex_lock(&ctx_id_mutex); |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 538 | ctx = idr_find(&ctx_id_table, cmd.id); |
| 539 | if (!ctx) |
| 540 | ctx = ERR_PTR(-ENOENT); |
| 541 | else if (ctx->file != file) |
| 542 | ctx = ERR_PTR(-EINVAL); |
| 543 | else |
| 544 | idr_remove(&ctx_id_table, ctx->id); |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 545 | mutex_unlock(&ctx_id_mutex); |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 546 | |
| 547 | if (IS_ERR(ctx)) |
| 548 | return PTR_ERR(ctx); |
| 549 | |
Sean Hefty | 1b52fa98 | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 550 | ib_ucm_ctx_put(ctx); |
| 551 | wait_for_completion(&ctx->comp); |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 552 | |
| 553 | /* No new events will be generated after destroying the cm_id. */ |
| 554 | ib_destroy_cm_id(ctx->cm_id); |
| 555 | /* Cleanup events not yet reported to the user. */ |
| 556 | ib_ucm_cleanup_events(ctx); |
| 557 | |
| 558 | resp.events_reported = ctx->events_reported; |
Jason Gunthorpe | 6f57c93 | 2018-03-27 14:18:47 -0600 | [diff] [blame] | 559 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 560 | &resp, sizeof(resp))) |
| 561 | result = -EFAULT; |
| 562 | |
| 563 | kfree(ctx); |
| 564 | return result; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 565 | } |
| 566 | |
| 567 | static ssize_t ib_ucm_attr_id(struct ib_ucm_file *file, |
| 568 | const char __user *inbuf, |
| 569 | int in_len, int out_len) |
| 570 | { |
| 571 | struct ib_ucm_attr_id_resp resp; |
| 572 | struct ib_ucm_attr_id cmd; |
| 573 | struct ib_ucm_context *ctx; |
| 574 | int result = 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 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 582 | ctx = ib_ucm_ctx_get(file, cmd.id); |
| 583 | if (IS_ERR(ctx)) |
| 584 | return PTR_ERR(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 585 | |
| 586 | resp.service_id = ctx->cm_id->service_id; |
| 587 | resp.service_mask = ctx->cm_id->service_mask; |
| 588 | resp.local_id = ctx->cm_id->local_id; |
| 589 | resp.remote_id = ctx->cm_id->remote_id; |
| 590 | |
Jason Gunthorpe | 6f57c93 | 2018-03-27 14:18:47 -0600 | [diff] [blame] | 591 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 592 | &resp, sizeof(resp))) |
| 593 | result = -EFAULT; |
| 594 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 595 | ib_ucm_ctx_put(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 596 | return result; |
| 597 | } |
| 598 | |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 599 | static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file, |
| 600 | const char __user *inbuf, |
| 601 | int in_len, int out_len) |
| 602 | { |
Sean Hefty | 6a9af2e | 2006-06-17 20:37:27 -0700 | [diff] [blame] | 603 | struct ib_uverbs_qp_attr resp; |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 604 | struct ib_ucm_init_qp_attr cmd; |
| 605 | struct ib_ucm_context *ctx; |
| 606 | struct ib_qp_attr qp_attr; |
| 607 | int result = 0; |
| 608 | |
| 609 | if (out_len < sizeof(resp)) |
| 610 | return -ENOSPC; |
| 611 | |
| 612 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 613 | return -EFAULT; |
| 614 | |
| 615 | ctx = ib_ucm_ctx_get(file, cmd.id); |
| 616 | if (IS_ERR(ctx)) |
| 617 | return PTR_ERR(ctx); |
| 618 | |
| 619 | resp.qp_attr_mask = 0; |
| 620 | memset(&qp_attr, 0, sizeof qp_attr); |
| 621 | qp_attr.qp_state = cmd.qp_state; |
| 622 | result = ib_cm_init_qp_attr(ctx->cm_id, &qp_attr, &resp.qp_attr_mask); |
| 623 | if (result) |
| 624 | goto out; |
| 625 | |
Dasaratharaman Chandramouli | d541e45 | 2017-06-08 13:37:43 -0400 | [diff] [blame] | 626 | ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr); |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 627 | |
Jason Gunthorpe | 6f57c93 | 2018-03-27 14:18:47 -0600 | [diff] [blame] | 628 | if (copy_to_user(u64_to_user_ptr(cmd.response), |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 629 | &resp, sizeof(resp))) |
| 630 | result = -EFAULT; |
| 631 | |
| 632 | out: |
| 633 | ib_ucm_ctx_put(ctx); |
| 634 | return result; |
| 635 | } |
| 636 | |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 637 | static int ucm_validate_listen(__be64 service_id, __be64 service_mask) |
| 638 | { |
| 639 | service_id &= service_mask; |
| 640 | |
| 641 | if (((service_id & IB_CMA_SERVICE_ID_MASK) == IB_CMA_SERVICE_ID) || |
| 642 | ((service_id & IB_SDP_SERVICE_ID_MASK) == IB_SDP_SERVICE_ID)) |
| 643 | return -EINVAL; |
| 644 | |
| 645 | return 0; |
| 646 | } |
| 647 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 648 | static ssize_t ib_ucm_listen(struct ib_ucm_file *file, |
| 649 | const char __user *inbuf, |
| 650 | int in_len, int out_len) |
| 651 | { |
| 652 | struct ib_ucm_listen cmd; |
| 653 | struct ib_ucm_context *ctx; |
| 654 | int result; |
| 655 | |
| 656 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 657 | return -EFAULT; |
| 658 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 659 | ctx = ib_ucm_ctx_get(file, cmd.id); |
| 660 | if (IS_ERR(ctx)) |
| 661 | return PTR_ERR(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 662 | |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 663 | result = ucm_validate_listen(cmd.service_id, cmd.service_mask); |
| 664 | if (result) |
| 665 | goto out; |
| 666 | |
Haggai Eran | 73fec7f | 2015-07-30 17:50:26 +0300 | [diff] [blame] | 667 | result = ib_cm_listen(ctx->cm_id, cmd.service_id, cmd.service_mask); |
Sean Hefty | 6e61d04 | 2006-06-17 20:37:28 -0700 | [diff] [blame] | 668 | out: |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 669 | ib_ucm_ctx_put(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 670 | return result; |
| 671 | } |
| 672 | |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 673 | static ssize_t ib_ucm_notify(struct ib_ucm_file *file, |
| 674 | const char __user *inbuf, |
| 675 | int in_len, int out_len) |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 676 | { |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 677 | struct ib_ucm_notify cmd; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 678 | struct ib_ucm_context *ctx; |
| 679 | int result; |
| 680 | |
| 681 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 682 | return -EFAULT; |
| 683 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 684 | ctx = ib_ucm_ctx_get(file, cmd.id); |
| 685 | if (IS_ERR(ctx)) |
| 686 | return PTR_ERR(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 687 | |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 688 | result = ib_cm_notify(ctx->cm_id, (enum ib_event_type) cmd.event); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 689 | ib_ucm_ctx_put(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 690 | return result; |
| 691 | } |
| 692 | |
| 693 | static int ib_ucm_alloc_data(const void **dest, u64 src, u32 len) |
| 694 | { |
| 695 | void *data; |
| 696 | |
| 697 | *dest = NULL; |
| 698 | |
| 699 | if (!len) |
| 700 | return 0; |
| 701 | |
Jason Gunthorpe | 6f57c93 | 2018-03-27 14:18:47 -0600 | [diff] [blame] | 702 | data = memdup_user(u64_to_user_ptr(src), len); |
Julia Lawall | e642df6 | 2010-05-22 10:21:27 +0200 | [diff] [blame] | 703 | if (IS_ERR(data)) |
| 704 | return PTR_ERR(data); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 705 | |
| 706 | *dest = data; |
| 707 | return 0; |
| 708 | } |
| 709 | |
Dasaratharaman Chandramouli | c2f8fc4 | 2017-04-27 19:05:58 -0400 | [diff] [blame] | 710 | static int ib_ucm_path_get(struct sa_path_rec **path, u64 src) |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 711 | { |
Sean Hefty | 6a9af2e | 2006-06-17 20:37:27 -0700 | [diff] [blame] | 712 | struct ib_user_path_rec upath; |
Dasaratharaman Chandramouli | c2f8fc4 | 2017-04-27 19:05:58 -0400 | [diff] [blame] | 713 | struct sa_path_rec *sa_path; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 714 | |
| 715 | *path = NULL; |
| 716 | |
| 717 | if (!src) |
| 718 | return 0; |
| 719 | |
| 720 | sa_path = kmalloc(sizeof(*sa_path), GFP_KERNEL); |
| 721 | if (!sa_path) |
| 722 | return -ENOMEM; |
| 723 | |
Jason Gunthorpe | 6f57c93 | 2018-03-27 14:18:47 -0600 | [diff] [blame] | 724 | if (copy_from_user(&upath, u64_to_user_ptr(src), |
Sean Hefty | 6a9af2e | 2006-06-17 20:37:27 -0700 | [diff] [blame] | 725 | sizeof(upath))) { |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 726 | |
| 727 | kfree(sa_path); |
| 728 | return -EFAULT; |
| 729 | } |
| 730 | |
Sean Hefty | 6a9af2e | 2006-06-17 20:37:27 -0700 | [diff] [blame] | 731 | ib_copy_path_rec_from_user(sa_path, &upath); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 732 | *path = sa_path; |
| 733 | return 0; |
| 734 | } |
| 735 | |
| 736 | static ssize_t ib_ucm_send_req(struct ib_ucm_file *file, |
| 737 | const char __user *inbuf, |
| 738 | int in_len, int out_len) |
| 739 | { |
| 740 | struct ib_cm_req_param param; |
| 741 | struct ib_ucm_context *ctx; |
| 742 | struct ib_ucm_req cmd; |
| 743 | int result; |
| 744 | |
| 745 | param.private_data = NULL; |
| 746 | param.primary_path = NULL; |
| 747 | param.alternate_path = NULL; |
| 748 | |
| 749 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 750 | return -EFAULT; |
| 751 | |
| 752 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); |
| 753 | if (result) |
| 754 | goto done; |
| 755 | |
| 756 | result = ib_ucm_path_get(¶m.primary_path, cmd.primary_path); |
| 757 | if (result) |
| 758 | goto done; |
| 759 | |
| 760 | result = ib_ucm_path_get(¶m.alternate_path, cmd.alternate_path); |
| 761 | if (result) |
| 762 | goto done; |
| 763 | |
| 764 | param.private_data_len = cmd.len; |
| 765 | param.service_id = cmd.sid; |
| 766 | param.qp_num = cmd.qpn; |
| 767 | param.qp_type = cmd.qp_type; |
| 768 | param.starting_psn = cmd.psn; |
| 769 | param.peer_to_peer = cmd.peer_to_peer; |
| 770 | param.responder_resources = cmd.responder_resources; |
| 771 | param.initiator_depth = cmd.initiator_depth; |
| 772 | param.remote_cm_response_timeout = cmd.remote_cm_response_timeout; |
| 773 | param.flow_control = cmd.flow_control; |
| 774 | param.local_cm_response_timeout = cmd.local_cm_response_timeout; |
| 775 | param.retry_count = cmd.retry_count; |
| 776 | param.rnr_retry_count = cmd.rnr_retry_count; |
| 777 | param.max_cm_retries = cmd.max_cm_retries; |
| 778 | param.srq = cmd.srq; |
| 779 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 780 | ctx = ib_ucm_ctx_get(file, cmd.id); |
| 781 | if (!IS_ERR(ctx)) { |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 782 | result = ib_send_cm_req(ctx->cm_id, ¶m); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 783 | ib_ucm_ctx_put(ctx); |
| 784 | } else |
| 785 | result = PTR_ERR(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 786 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 787 | done: |
Hal Rosenstock | 79d8190 | 2005-07-27 20:38:56 -0700 | [diff] [blame] | 788 | kfree(param.private_data); |
| 789 | kfree(param.primary_path); |
| 790 | kfree(param.alternate_path); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 791 | return result; |
| 792 | } |
| 793 | |
| 794 | static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file, |
| 795 | const char __user *inbuf, |
| 796 | int in_len, int out_len) |
| 797 | { |
| 798 | struct ib_cm_rep_param param; |
| 799 | struct ib_ucm_context *ctx; |
| 800 | struct ib_ucm_rep cmd; |
| 801 | int result; |
| 802 | |
| 803 | param.private_data = NULL; |
| 804 | |
| 805 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 806 | return -EFAULT; |
| 807 | |
| 808 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); |
| 809 | if (result) |
| 810 | return result; |
| 811 | |
| 812 | param.qp_num = cmd.qpn; |
| 813 | param.starting_psn = cmd.psn; |
| 814 | param.private_data_len = cmd.len; |
| 815 | param.responder_resources = cmd.responder_resources; |
| 816 | param.initiator_depth = cmd.initiator_depth; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 817 | param.failover_accepted = cmd.failover_accepted; |
| 818 | param.flow_control = cmd.flow_control; |
| 819 | param.rnr_retry_count = cmd.rnr_retry_count; |
| 820 | param.srq = cmd.srq; |
| 821 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 822 | ctx = ib_ucm_ctx_get(file, cmd.id); |
| 823 | if (!IS_ERR(ctx)) { |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 824 | ctx->uid = cmd.uid; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 825 | result = ib_send_cm_rep(ctx->cm_id, ¶m); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 826 | ib_ucm_ctx_put(ctx); |
| 827 | } else |
| 828 | result = PTR_ERR(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 829 | |
Hal Rosenstock | 79d8190 | 2005-07-27 20:38:56 -0700 | [diff] [blame] | 830 | kfree(param.private_data); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 831 | return result; |
| 832 | } |
| 833 | |
| 834 | static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file, |
| 835 | const char __user *inbuf, int in_len, |
| 836 | int (*func)(struct ib_cm_id *cm_id, |
| 837 | const void *private_data, |
| 838 | u8 private_data_len)) |
| 839 | { |
| 840 | struct ib_ucm_private_data cmd; |
| 841 | struct ib_ucm_context *ctx; |
| 842 | const void *private_data = NULL; |
| 843 | int result; |
| 844 | |
| 845 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 846 | return -EFAULT; |
| 847 | |
| 848 | result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len); |
| 849 | if (result) |
| 850 | return result; |
| 851 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 852 | ctx = ib_ucm_ctx_get(file, cmd.id); |
| 853 | if (!IS_ERR(ctx)) { |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 854 | result = func(ctx->cm_id, private_data, cmd.len); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 855 | ib_ucm_ctx_put(ctx); |
| 856 | } else |
| 857 | result = PTR_ERR(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 858 | |
Hal Rosenstock | 79d8190 | 2005-07-27 20:38:56 -0700 | [diff] [blame] | 859 | kfree(private_data); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 860 | return result; |
| 861 | } |
| 862 | |
| 863 | static ssize_t ib_ucm_send_rtu(struct ib_ucm_file *file, |
| 864 | const char __user *inbuf, |
| 865 | int in_len, int out_len) |
| 866 | { |
| 867 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_rtu); |
| 868 | } |
| 869 | |
| 870 | static ssize_t ib_ucm_send_dreq(struct ib_ucm_file *file, |
| 871 | const char __user *inbuf, |
| 872 | int in_len, int out_len) |
| 873 | { |
| 874 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_dreq); |
| 875 | } |
| 876 | |
| 877 | static ssize_t ib_ucm_send_drep(struct ib_ucm_file *file, |
| 878 | const char __user *inbuf, |
| 879 | int in_len, int out_len) |
| 880 | { |
| 881 | return ib_ucm_send_private_data(file, inbuf, in_len, ib_send_cm_drep); |
| 882 | } |
| 883 | |
| 884 | static ssize_t ib_ucm_send_info(struct ib_ucm_file *file, |
| 885 | const char __user *inbuf, int in_len, |
| 886 | int (*func)(struct ib_cm_id *cm_id, |
| 887 | int status, |
| 888 | const void *info, |
| 889 | u8 info_len, |
| 890 | const void *data, |
| 891 | u8 data_len)) |
| 892 | { |
| 893 | struct ib_ucm_context *ctx; |
| 894 | struct ib_ucm_info cmd; |
| 895 | const void *data = NULL; |
| 896 | const void *info = NULL; |
| 897 | int result; |
| 898 | |
| 899 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 900 | return -EFAULT; |
| 901 | |
| 902 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.data_len); |
| 903 | if (result) |
| 904 | goto done; |
| 905 | |
| 906 | result = ib_ucm_alloc_data(&info, cmd.info, cmd.info_len); |
| 907 | if (result) |
| 908 | goto done; |
| 909 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 910 | ctx = ib_ucm_ctx_get(file, cmd.id); |
| 911 | if (!IS_ERR(ctx)) { |
| 912 | result = func(ctx->cm_id, cmd.status, info, cmd.info_len, |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 913 | data, cmd.data_len); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 914 | ib_ucm_ctx_put(ctx); |
| 915 | } else |
| 916 | result = PTR_ERR(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 917 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 918 | done: |
Hal Rosenstock | 79d8190 | 2005-07-27 20:38:56 -0700 | [diff] [blame] | 919 | kfree(data); |
| 920 | kfree(info); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 921 | return result; |
| 922 | } |
| 923 | |
| 924 | static ssize_t ib_ucm_send_rej(struct ib_ucm_file *file, |
| 925 | const char __user *inbuf, |
| 926 | int in_len, int out_len) |
| 927 | { |
| 928 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_rej); |
| 929 | } |
| 930 | |
| 931 | static ssize_t ib_ucm_send_apr(struct ib_ucm_file *file, |
| 932 | const char __user *inbuf, |
| 933 | int in_len, int out_len) |
| 934 | { |
| 935 | return ib_ucm_send_info(file, inbuf, in_len, (void *)ib_send_cm_apr); |
| 936 | } |
| 937 | |
| 938 | static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file, |
| 939 | const char __user *inbuf, |
| 940 | int in_len, int out_len) |
| 941 | { |
| 942 | struct ib_ucm_context *ctx; |
| 943 | struct ib_ucm_mra cmd; |
| 944 | const void *data = NULL; |
| 945 | int result; |
| 946 | |
| 947 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 948 | return -EFAULT; |
| 949 | |
| 950 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); |
| 951 | if (result) |
| 952 | return result; |
| 953 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 954 | ctx = ib_ucm_ctx_get(file, cmd.id); |
| 955 | if (!IS_ERR(ctx)) { |
| 956 | result = ib_send_cm_mra(ctx->cm_id, cmd.timeout, data, cmd.len); |
| 957 | ib_ucm_ctx_put(ctx); |
| 958 | } else |
| 959 | result = PTR_ERR(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 960 | |
Hal Rosenstock | 79d8190 | 2005-07-27 20:38:56 -0700 | [diff] [blame] | 961 | kfree(data); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 962 | return result; |
| 963 | } |
| 964 | |
| 965 | static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file, |
| 966 | const char __user *inbuf, |
| 967 | int in_len, int out_len) |
| 968 | { |
| 969 | struct ib_ucm_context *ctx; |
Dasaratharaman Chandramouli | c2f8fc4 | 2017-04-27 19:05:58 -0400 | [diff] [blame] | 970 | struct sa_path_rec *path = NULL; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 971 | struct ib_ucm_lap cmd; |
| 972 | const void *data = NULL; |
| 973 | int result; |
| 974 | |
| 975 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 976 | return -EFAULT; |
| 977 | |
| 978 | result = ib_ucm_alloc_data(&data, cmd.data, cmd.len); |
| 979 | if (result) |
| 980 | goto done; |
| 981 | |
| 982 | result = ib_ucm_path_get(&path, cmd.path); |
| 983 | if (result) |
| 984 | goto done; |
| 985 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 986 | ctx = ib_ucm_ctx_get(file, cmd.id); |
| 987 | if (!IS_ERR(ctx)) { |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 988 | result = ib_send_cm_lap(ctx->cm_id, path, data, cmd.len); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 989 | ib_ucm_ctx_put(ctx); |
| 990 | } else |
| 991 | result = PTR_ERR(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 992 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 993 | done: |
Hal Rosenstock | 79d8190 | 2005-07-27 20:38:56 -0700 | [diff] [blame] | 994 | kfree(data); |
| 995 | kfree(path); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 996 | return result; |
| 997 | } |
| 998 | |
| 999 | static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file, |
| 1000 | const char __user *inbuf, |
| 1001 | int in_len, int out_len) |
| 1002 | { |
Parav Pandit | 58796e6 | 2018-08-06 07:45:51 +0300 | [diff] [blame] | 1003 | struct ib_cm_sidr_req_param param = {}; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1004 | struct ib_ucm_context *ctx; |
| 1005 | struct ib_ucm_sidr_req cmd; |
| 1006 | int result; |
| 1007 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1008 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1009 | return -EFAULT; |
| 1010 | |
| 1011 | result = ib_ucm_alloc_data(¶m.private_data, cmd.data, cmd.len); |
| 1012 | if (result) |
| 1013 | goto done; |
| 1014 | |
| 1015 | result = ib_ucm_path_get(¶m.path, cmd.path); |
| 1016 | if (result) |
| 1017 | goto done; |
| 1018 | |
| 1019 | param.private_data_len = cmd.len; |
| 1020 | param.service_id = cmd.sid; |
| 1021 | param.timeout_ms = cmd.timeout; |
| 1022 | param.max_cm_retries = cmd.max_cm_retries; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1023 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 1024 | ctx = ib_ucm_ctx_get(file, cmd.id); |
| 1025 | if (!IS_ERR(ctx)) { |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1026 | result = ib_send_cm_sidr_req(ctx->cm_id, ¶m); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 1027 | ib_ucm_ctx_put(ctx); |
| 1028 | } else |
| 1029 | result = PTR_ERR(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1030 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1031 | done: |
Hal Rosenstock | 79d8190 | 2005-07-27 20:38:56 -0700 | [diff] [blame] | 1032 | kfree(param.private_data); |
| 1033 | kfree(param.path); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1034 | return result; |
| 1035 | } |
| 1036 | |
| 1037 | static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file, |
| 1038 | const char __user *inbuf, |
| 1039 | int in_len, int out_len) |
| 1040 | { |
| 1041 | struct ib_cm_sidr_rep_param param; |
| 1042 | struct ib_ucm_sidr_rep cmd; |
| 1043 | struct ib_ucm_context *ctx; |
| 1044 | int result; |
| 1045 | |
| 1046 | param.info = NULL; |
| 1047 | |
| 1048 | if (copy_from_user(&cmd, inbuf, sizeof(cmd))) |
| 1049 | return -EFAULT; |
| 1050 | |
| 1051 | result = ib_ucm_alloc_data(¶m.private_data, |
| 1052 | cmd.data, cmd.data_len); |
| 1053 | if (result) |
| 1054 | goto done; |
| 1055 | |
| 1056 | result = ib_ucm_alloc_data(¶m.info, cmd.info, cmd.info_len); |
| 1057 | if (result) |
| 1058 | goto done; |
| 1059 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 1060 | param.qp_num = cmd.qpn; |
| 1061 | param.qkey = cmd.qkey; |
| 1062 | param.status = cmd.status; |
| 1063 | param.info_length = cmd.info_len; |
| 1064 | param.private_data_len = cmd.data_len; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1065 | |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 1066 | ctx = ib_ucm_ctx_get(file, cmd.id); |
| 1067 | if (!IS_ERR(ctx)) { |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1068 | result = ib_send_cm_sidr_rep(ctx->cm_id, ¶m); |
Sean Hefty | b9ef520 | 2005-08-19 13:46:34 -0700 | [diff] [blame] | 1069 | ib_ucm_ctx_put(ctx); |
| 1070 | } else |
| 1071 | result = PTR_ERR(ctx); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1072 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1073 | done: |
Hal Rosenstock | 79d8190 | 2005-07-27 20:38:56 -0700 | [diff] [blame] | 1074 | kfree(param.private_data); |
| 1075 | kfree(param.info); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1076 | return result; |
| 1077 | } |
| 1078 | |
| 1079 | static ssize_t (*ucm_cmd_table[])(struct ib_ucm_file *file, |
| 1080 | const char __user *inbuf, |
| 1081 | int in_len, int out_len) = { |
| 1082 | [IB_USER_CM_CMD_CREATE_ID] = ib_ucm_create_id, |
| 1083 | [IB_USER_CM_CMD_DESTROY_ID] = ib_ucm_destroy_id, |
| 1084 | [IB_USER_CM_CMD_ATTR_ID] = ib_ucm_attr_id, |
| 1085 | [IB_USER_CM_CMD_LISTEN] = ib_ucm_listen, |
Sean Hefty | e1444b5 | 2006-11-28 14:57:13 -0800 | [diff] [blame] | 1086 | [IB_USER_CM_CMD_NOTIFY] = ib_ucm_notify, |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1087 | [IB_USER_CM_CMD_SEND_REQ] = ib_ucm_send_req, |
| 1088 | [IB_USER_CM_CMD_SEND_REP] = ib_ucm_send_rep, |
| 1089 | [IB_USER_CM_CMD_SEND_RTU] = ib_ucm_send_rtu, |
| 1090 | [IB_USER_CM_CMD_SEND_DREQ] = ib_ucm_send_dreq, |
| 1091 | [IB_USER_CM_CMD_SEND_DREP] = ib_ucm_send_drep, |
| 1092 | [IB_USER_CM_CMD_SEND_REJ] = ib_ucm_send_rej, |
| 1093 | [IB_USER_CM_CMD_SEND_MRA] = ib_ucm_send_mra, |
| 1094 | [IB_USER_CM_CMD_SEND_LAP] = ib_ucm_send_lap, |
| 1095 | [IB_USER_CM_CMD_SEND_APR] = ib_ucm_send_apr, |
| 1096 | [IB_USER_CM_CMD_SEND_SIDR_REQ] = ib_ucm_send_sidr_req, |
| 1097 | [IB_USER_CM_CMD_SEND_SIDR_REP] = ib_ucm_send_sidr_rep, |
| 1098 | [IB_USER_CM_CMD_EVENT] = ib_ucm_event, |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 1099 | [IB_USER_CM_CMD_INIT_QP_ATTR] = ib_ucm_init_qp_attr, |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1100 | }; |
| 1101 | |
| 1102 | static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, |
| 1103 | size_t len, loff_t *pos) |
| 1104 | { |
| 1105 | struct ib_ucm_file *file = filp->private_data; |
| 1106 | struct ib_ucm_cmd_hdr hdr; |
| 1107 | ssize_t result; |
| 1108 | |
Leon Romanovsky | f73a1db | 2016-11-21 19:38:20 +0200 | [diff] [blame] | 1109 | if (!ib_safe_file_access(filp)) { |
| 1110 | pr_err_once("ucm_write: process %d (%s) changed security contexts after opening file descriptor, this is not allowed.\n", |
| 1111 | task_tgid_vnr(current), current->comm); |
Jason Gunthorpe | e6bd18f | 2016-04-10 19:13:13 -0600 | [diff] [blame] | 1112 | return -EACCES; |
Leon Romanovsky | f73a1db | 2016-11-21 19:38:20 +0200 | [diff] [blame] | 1113 | } |
Jason Gunthorpe | e6bd18f | 2016-04-10 19:13:13 -0600 | [diff] [blame] | 1114 | |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1115 | if (len < sizeof(hdr)) |
| 1116 | return -EINVAL; |
| 1117 | |
| 1118 | if (copy_from_user(&hdr, buf, sizeof(hdr))) |
| 1119 | return -EFAULT; |
| 1120 | |
Hefty, Sean | caf6e3f | 2011-10-06 09:33:05 -0700 | [diff] [blame] | 1121 | if (hdr.cmd >= ARRAY_SIZE(ucm_cmd_table)) |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1122 | return -EINVAL; |
| 1123 | |
| 1124 | if (hdr.in + sizeof(hdr) > len) |
| 1125 | return -EINVAL; |
| 1126 | |
| 1127 | result = ucm_cmd_table[hdr.cmd](file, buf + sizeof(hdr), |
| 1128 | hdr.in, hdr.out); |
| 1129 | if (!result) |
| 1130 | result = len; |
| 1131 | |
| 1132 | return result; |
| 1133 | } |
| 1134 | |
Al Viro | afc9a42 | 2017-07-03 06:39:46 -0400 | [diff] [blame] | 1135 | static __poll_t ib_ucm_poll(struct file *filp, |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1136 | struct poll_table_struct *wait) |
| 1137 | { |
| 1138 | struct ib_ucm_file *file = filp->private_data; |
Al Viro | afc9a42 | 2017-07-03 06:39:46 -0400 | [diff] [blame] | 1139 | __poll_t mask = 0; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1140 | |
| 1141 | poll_wait(filp, &file->poll_wait, wait); |
| 1142 | |
| 1143 | if (!list_empty(&file->events)) |
Linus Torvalds | a9a0884 | 2018-02-11 14:34:03 -0800 | [diff] [blame] | 1144 | mask = EPOLLIN | EPOLLRDNORM; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1145 | |
| 1146 | return mask; |
| 1147 | } |
| 1148 | |
Roland Dreier | 5ba18b1 | 2008-07-24 20:36:59 -0700 | [diff] [blame] | 1149 | /* |
| 1150 | * ib_ucm_open() does not need the BKL: |
| 1151 | * |
| 1152 | * - no global state is referred to; |
| 1153 | * - there is no ioctl method to race against; |
| 1154 | * - no further module initialization is required for open to work |
| 1155 | * after the device is registered. |
| 1156 | */ |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1157 | static int ib_ucm_open(struct inode *inode, struct file *filp) |
| 1158 | { |
| 1159 | struct ib_ucm_file *file; |
| 1160 | |
| 1161 | file = kmalloc(sizeof(*file), GFP_KERNEL); |
| 1162 | if (!file) |
| 1163 | return -ENOMEM; |
| 1164 | |
| 1165 | INIT_LIST_HEAD(&file->events); |
| 1166 | INIT_LIST_HEAD(&file->ctxs); |
| 1167 | init_waitqueue_head(&file->poll_wait); |
| 1168 | |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 1169 | mutex_init(&file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1170 | |
| 1171 | filp->private_data = file; |
| 1172 | file->filp = filp; |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1173 | file->device = container_of(inode->i_cdev, struct ib_ucm_device, cdev); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1174 | |
Roland Dreier | bc1db9a | 2010-04-09 17:13:50 -0700 | [diff] [blame] | 1175 | return nonseekable_open(inode, filp); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1176 | } |
| 1177 | |
| 1178 | static int ib_ucm_close(struct inode *inode, struct file *filp) |
| 1179 | { |
| 1180 | struct ib_ucm_file *file = filp->private_data; |
| 1181 | struct ib_ucm_context *ctx; |
| 1182 | |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 1183 | mutex_lock(&file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1184 | while (!list_empty(&file->ctxs)) { |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1185 | ctx = list_entry(file->ctxs.next, |
| 1186 | struct ib_ucm_context, file_list); |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 1187 | mutex_unlock(&file->file_mutex); |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 1188 | |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 1189 | mutex_lock(&ctx_id_mutex); |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 1190 | idr_remove(&ctx_id_table, ctx->id); |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 1191 | mutex_unlock(&ctx_id_mutex); |
Sean Hefty | 0b2b35f | 2005-09-01 09:28:03 -0700 | [diff] [blame] | 1192 | |
| 1193 | ib_destroy_cm_id(ctx->cm_id); |
| 1194 | ib_ucm_cleanup_events(ctx); |
| 1195 | kfree(ctx); |
| 1196 | |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 1197 | mutex_lock(&file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1198 | } |
Sean Hefty | 4be10c1e | 2006-05-25 10:03:23 -0700 | [diff] [blame] | 1199 | mutex_unlock(&file->file_mutex); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1200 | kfree(file); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1201 | return 0; |
| 1202 | } |
| 1203 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1204 | static void ib_ucm_release_dev(struct device *dev) |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1205 | { |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1206 | struct ib_ucm_device *ucm_dev; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1207 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1208 | ucm_dev = container_of(dev, struct ib_ucm_device, dev); |
Jason Gunthorpe | a0d7819 | 2017-03-17 12:48:15 -0600 | [diff] [blame] | 1209 | kfree(ucm_dev); |
| 1210 | } |
| 1211 | |
| 1212 | static void ib_ucm_free_dev(struct ib_ucm_device *ucm_dev) |
| 1213 | { |
Huy Nguyen | 8cf12d7 | 2018-01-08 12:15:38 +0200 | [diff] [blame] | 1214 | clear_bit(ucm_dev->devnum, dev_map); |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1215 | } |
| 1216 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 1217 | static const struct file_operations ucm_fops = { |
Alexander Chiang | cdb8e43 | 2010-02-02 19:09:11 +0000 | [diff] [blame] | 1218 | .owner = THIS_MODULE, |
| 1219 | .open = ib_ucm_open, |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1220 | .release = ib_ucm_close, |
Alexander Chiang | cdb8e43 | 2010-02-02 19:09:11 +0000 | [diff] [blame] | 1221 | .write = ib_ucm_write, |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1222 | .poll = ib_ucm_poll, |
Roland Dreier | bc1db9a | 2010-04-09 17:13:50 -0700 | [diff] [blame] | 1223 | .llseek = no_llseek, |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1224 | }; |
| 1225 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1226 | static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, |
| 1227 | char *buf) |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1228 | { |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1229 | struct ib_ucm_device *ucm_dev; |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 1230 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1231 | ucm_dev = container_of(dev, struct ib_ucm_device, dev); |
| 1232 | return sprintf(buf, "%s\n", ucm_dev->ib_dev->name); |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1233 | } |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1234 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1235 | |
| 1236 | static void ib_ucm_add_one(struct ib_device *device) |
| 1237 | { |
Alexander Chiang | dd08f70 | 2010-02-02 19:08:55 +0000 | [diff] [blame] | 1238 | int devnum; |
Alexander Chiang | 31d14b6 | 2010-02-02 19:09:00 +0000 | [diff] [blame] | 1239 | dev_t base; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1240 | struct ib_ucm_device *ucm_dev; |
| 1241 | |
Michael Wang | 72219cea | 2015-05-05 14:50:34 +0200 | [diff] [blame] | 1242 | if (!device->alloc_ucontext || !rdma_cap_ib_cm(device, 1)) |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1243 | return; |
| 1244 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 1245 | ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL); |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1246 | if (!ucm_dev) |
| 1247 | return; |
| 1248 | |
Jason Gunthorpe | a0d7819 | 2017-03-17 12:48:15 -0600 | [diff] [blame] | 1249 | device_initialize(&ucm_dev->dev); |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1250 | ucm_dev->ib_dev = device; |
Jason Gunthorpe | a0d7819 | 2017-03-17 12:48:15 -0600 | [diff] [blame] | 1251 | ucm_dev->dev.release = ib_ucm_release_dev; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1252 | |
Alexander Chiang | dd08f70 | 2010-02-02 19:08:55 +0000 | [diff] [blame] | 1253 | devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES); |
Huy Nguyen | 8cf12d7 | 2018-01-08 12:15:38 +0200 | [diff] [blame] | 1254 | if (devnum >= IB_UCM_MAX_DEVICES) |
| 1255 | goto err; |
| 1256 | ucm_dev->devnum = devnum; |
| 1257 | set_bit(devnum, dev_map); |
| 1258 | if (devnum >= IB_UCM_NUM_FIXED_MINOR) |
| 1259 | base = dynamic_ucm_dev + devnum - IB_UCM_NUM_FIXED_MINOR; |
| 1260 | else |
| 1261 | base = IB_UCM_BASE_DEV + devnum; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1262 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1263 | cdev_init(&ucm_dev->cdev, &ucm_fops); |
| 1264 | ucm_dev->cdev.owner = THIS_MODULE; |
| 1265 | kobject_set_name(&ucm_dev->cdev.kobj, "ucm%d", ucm_dev->devnum); |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1266 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1267 | ucm_dev->dev.class = &cm_class; |
Bart Van Assche | 1e35a08 | 2017-01-20 13:04:14 -0800 | [diff] [blame] | 1268 | ucm_dev->dev.parent = device->dev.parent; |
Jason Gunthorpe | a0d7819 | 2017-03-17 12:48:15 -0600 | [diff] [blame] | 1269 | ucm_dev->dev.devt = base; |
| 1270 | |
Kay Sievers | d927e38 | 2009-01-06 10:44:39 -0800 | [diff] [blame] | 1271 | dev_set_name(&ucm_dev->dev, "ucm%d", ucm_dev->devnum); |
Jason Gunthorpe | a0d7819 | 2017-03-17 12:48:15 -0600 | [diff] [blame] | 1272 | if (cdev_device_add(&ucm_dev->cdev, &ucm_dev->dev)) |
| 1273 | goto err_devnum; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1274 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1275 | if (device_create_file(&ucm_dev->dev, &dev_attr_ibdev)) |
| 1276 | goto err_dev; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1277 | |
| 1278 | ib_set_client_data(device, &ucm_client, ucm_dev); |
| 1279 | return; |
| 1280 | |
Tony Jones | f4e91eb | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1281 | err_dev: |
Jason Gunthorpe | a0d7819 | 2017-03-17 12:48:15 -0600 | [diff] [blame] | 1282 | cdev_device_del(&ucm_dev->cdev, &ucm_dev->dev); |
| 1283 | err_devnum: |
| 1284 | ib_ucm_free_dev(ucm_dev); |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1285 | err: |
Jason Gunthorpe | a0d7819 | 2017-03-17 12:48:15 -0600 | [diff] [blame] | 1286 | put_device(&ucm_dev->dev); |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1287 | return; |
| 1288 | } |
| 1289 | |
Haggai Eran | 7c1eb45 | 2015-07-30 17:50:14 +0300 | [diff] [blame] | 1290 | static void ib_ucm_remove_one(struct ib_device *device, void *client_data) |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1291 | { |
Haggai Eran | 7c1eb45 | 2015-07-30 17:50:14 +0300 | [diff] [blame] | 1292 | struct ib_ucm_device *ucm_dev = client_data; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1293 | |
| 1294 | if (!ucm_dev) |
| 1295 | return; |
| 1296 | |
Jason Gunthorpe | a0d7819 | 2017-03-17 12:48:15 -0600 | [diff] [blame] | 1297 | cdev_device_del(&ucm_dev->cdev, &ucm_dev->dev); |
| 1298 | ib_ucm_free_dev(ucm_dev); |
| 1299 | put_device(&ucm_dev->dev); |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1300 | } |
| 1301 | |
Andi Kleen | 0933e2d | 2010-01-05 12:48:09 +0100 | [diff] [blame] | 1302 | static CLASS_ATTR_STRING(abi_version, S_IRUGO, |
| 1303 | __stringify(IB_USER_CM_ABI_VERSION)); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1304 | |
| 1305 | static int __init ib_ucm_init(void) |
| 1306 | { |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1307 | int ret; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1308 | |
Huy Nguyen | 8cf12d7 | 2018-01-08 12:15:38 +0200 | [diff] [blame] | 1309 | ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_NUM_FIXED_MINOR, |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1310 | "infiniband_cm"); |
| 1311 | if (ret) { |
Parav Pandit | aba25a3e | 2016-03-02 00:50:29 +0530 | [diff] [blame] | 1312 | pr_err("ucm: couldn't register device number\n"); |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 1313 | goto error1; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1314 | } |
| 1315 | |
Huy Nguyen | 8cf12d7 | 2018-01-08 12:15:38 +0200 | [diff] [blame] | 1316 | ret = alloc_chrdev_region(&dynamic_ucm_dev, 0, IB_UCM_NUM_DYNAMIC_MINOR, |
| 1317 | "infiniband_cm"); |
| 1318 | if (ret) { |
| 1319 | pr_err("ucm: couldn't register dynamic device number\n"); |
| 1320 | goto err_alloc; |
| 1321 | } |
| 1322 | |
Andi Kleen | 0933e2d | 2010-01-05 12:48:09 +0100 | [diff] [blame] | 1323 | ret = class_create_file(&cm_class, &class_attr_abi_version.attr); |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1324 | if (ret) { |
Parav Pandit | aba25a3e | 2016-03-02 00:50:29 +0530 | [diff] [blame] | 1325 | pr_err("ucm: couldn't create abi_version attribute\n"); |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 1326 | goto error2; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1327 | } |
| 1328 | |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1329 | ret = ib_register_client(&ucm_client); |
| 1330 | if (ret) { |
Parav Pandit | aba25a3e | 2016-03-02 00:50:29 +0530 | [diff] [blame] | 1331 | pr_err("ucm: couldn't register client\n"); |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 1332 | goto error3; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1333 | } |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1334 | return 0; |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1335 | |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 1336 | error3: |
Andi Kleen | 0933e2d | 2010-01-05 12:48:09 +0100 | [diff] [blame] | 1337 | class_remove_file(&cm_class, &class_attr_abi_version.attr); |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 1338 | error2: |
Huy Nguyen | 8cf12d7 | 2018-01-08 12:15:38 +0200 | [diff] [blame] | 1339 | unregister_chrdev_region(dynamic_ucm_dev, IB_UCM_NUM_DYNAMIC_MINOR); |
| 1340 | err_alloc: |
| 1341 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_NUM_FIXED_MINOR); |
Sean Hefty | 9af57b7 | 2007-07-16 21:49:35 -0700 | [diff] [blame] | 1342 | error1: |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1343 | return ret; |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1344 | } |
| 1345 | |
| 1346 | static void __exit ib_ucm_cleanup(void) |
| 1347 | { |
Sean Hefty | 07d357d | 2005-10-17 15:37:43 -0700 | [diff] [blame] | 1348 | ib_unregister_client(&ucm_client); |
Andi Kleen | 0933e2d | 2010-01-05 12:48:09 +0100 | [diff] [blame] | 1349 | class_remove_file(&cm_class, &class_attr_abi_version.attr); |
Huy Nguyen | 8cf12d7 | 2018-01-08 12:15:38 +0200 | [diff] [blame] | 1350 | unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_NUM_FIXED_MINOR); |
| 1351 | unregister_chrdev_region(dynamic_ucm_dev, IB_UCM_NUM_DYNAMIC_MINOR); |
Roland Dreier | 5d7edb3 | 2005-10-24 10:53:25 -0700 | [diff] [blame] | 1352 | idr_destroy(&ctx_id_table); |
Hal Rosenstock | a5b7454 | 2005-07-27 11:45:44 -0700 | [diff] [blame] | 1353 | } |
| 1354 | |
| 1355 | module_init(ib_ucm_init); |
| 1356 | module_exit(ib_ucm_cleanup); |