| 1 | /* |
| 2 | * Copyright (c) 2014 Intel Corporation. All rights reserved. |
| 3 | * Copyright (c) 2014 Chelsio, Inc. All rights reserved. |
| 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the |
| 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. |
| 32 | */ |
| 33 | |
| 34 | #include "iwpm_util.h" |
| 35 | |
| 36 | static const char iwpm_ulib_name[IWPM_ULIBNAME_SIZE] = "iWarpPortMapperUser"; |
| 37 | static int iwpm_ulib_version = 3; |
| 38 | static int iwpm_user_pid = IWPM_PID_UNDEFINED; |
| 39 | static atomic_t echo_nlmsg_seq; |
| 40 | |
| 41 | int iwpm_valid_pid(void) |
| 42 | { |
| 43 | return iwpm_user_pid > 0; |
| 44 | } |
| 45 | EXPORT_SYMBOL(iwpm_valid_pid); |
| 46 | |
| 47 | /* |
| 48 | * iwpm_register_pid - Send a netlink query to user space |
| 49 | * for the iwarp port mapper pid |
| 50 | * |
| 51 | * nlmsg attributes: |
| 52 | * [IWPM_NLA_REG_PID_SEQ] |
| 53 | * [IWPM_NLA_REG_IF_NAME] |
| 54 | * [IWPM_NLA_REG_IBDEV_NAME] |
| 55 | * [IWPM_NLA_REG_ULIB_NAME] |
| 56 | */ |
| 57 | int iwpm_register_pid(struct iwpm_dev_data *pm_msg, u8 nl_client) |
| 58 | { |
| 59 | struct sk_buff *skb = NULL; |
| 60 | struct iwpm_nlmsg_request *nlmsg_request = NULL; |
| 61 | struct nlmsghdr *nlh; |
| 62 | u32 msg_seq; |
| 63 | const char *err_str = ""; |
| 64 | int ret = -EINVAL; |
| 65 | |
| 66 | if (!iwpm_valid_client(nl_client)) { |
| 67 | err_str = "Invalid port mapper client"; |
| 68 | goto pid_query_error; |
| 69 | } |
| 70 | if (iwpm_registered_client(nl_client)) |
| 71 | return 0; |
| 72 | skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REG_PID, &nlh, nl_client); |
| 73 | if (!skb) { |
| 74 | err_str = "Unable to create a nlmsg"; |
| 75 | goto pid_query_error; |
| 76 | } |
| 77 | nlh->nlmsg_seq = iwpm_get_nlmsg_seq(); |
| 78 | nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, nl_client, GFP_KERNEL); |
| 79 | if (!nlmsg_request) { |
| 80 | err_str = "Unable to allocate netlink request"; |
| 81 | goto pid_query_error; |
| 82 | } |
| 83 | msg_seq = atomic_read(&echo_nlmsg_seq); |
| 84 | |
| 85 | /* fill in the pid request message */ |
| 86 | err_str = "Unable to put attribute of the nlmsg"; |
| 87 | ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, IWPM_NLA_REG_PID_SEQ); |
| 88 | if (ret) |
| 89 | goto pid_query_error; |
| 90 | ret = ibnl_put_attr(skb, nlh, IWPM_IFNAME_SIZE, |
| 91 | pm_msg->if_name, IWPM_NLA_REG_IF_NAME); |
| 92 | if (ret) |
| 93 | goto pid_query_error; |
| 94 | ret = ibnl_put_attr(skb, nlh, IWPM_DEVNAME_SIZE, |
| 95 | pm_msg->dev_name, IWPM_NLA_REG_IBDEV_NAME); |
| 96 | if (ret) |
| 97 | goto pid_query_error; |
| 98 | ret = ibnl_put_attr(skb, nlh, IWPM_ULIBNAME_SIZE, |
| 99 | (char *)iwpm_ulib_name, IWPM_NLA_REG_ULIB_NAME); |
| 100 | if (ret) |
| 101 | goto pid_query_error; |
| 102 | |
| 103 | pr_debug("%s: Multicasting a nlmsg (dev = %s ifname = %s iwpm = %s)\n", |
| 104 | __func__, pm_msg->dev_name, pm_msg->if_name, iwpm_ulib_name); |
| 105 | |
| 106 | ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_IWPM, GFP_KERNEL); |
| 107 | if (ret) { |
| 108 | skb = NULL; /* skb is freed in the netlink send-op handling */ |
| 109 | iwpm_set_registered(nl_client, 1); |
| 110 | iwpm_user_pid = IWPM_PID_UNAVAILABLE; |
| 111 | err_str = "Unable to send a nlmsg"; |
| 112 | goto pid_query_error; |
| 113 | } |
| 114 | nlmsg_request->req_buffer = pm_msg; |
| 115 | ret = iwpm_wait_complete_req(nlmsg_request); |
| 116 | return ret; |
| 117 | pid_query_error: |
| 118 | pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client); |
| 119 | if (skb) |
| 120 | dev_kfree_skb(skb); |
| 121 | if (nlmsg_request) |
| 122 | iwpm_free_nlmsg_request(&nlmsg_request->kref); |
| 123 | return ret; |
| 124 | } |
| 125 | EXPORT_SYMBOL(iwpm_register_pid); |
| 126 | |
| 127 | /* |
| 128 | * iwpm_add_mapping - Send a netlink add mapping message |
| 129 | * to the port mapper |
| 130 | * nlmsg attributes: |
| 131 | * [IWPM_NLA_MANAGE_MAPPING_SEQ] |
| 132 | * [IWPM_NLA_MANAGE_ADDR] |
| 133 | */ |
| 134 | int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client) |
| 135 | { |
| 136 | struct sk_buff *skb = NULL; |
| 137 | struct iwpm_nlmsg_request *nlmsg_request = NULL; |
| 138 | struct nlmsghdr *nlh; |
| 139 | u32 msg_seq; |
| 140 | const char *err_str = ""; |
| 141 | int ret = -EINVAL; |
| 142 | |
| 143 | if (!iwpm_valid_client(nl_client)) { |
| 144 | err_str = "Invalid port mapper client"; |
| 145 | goto add_mapping_error; |
| 146 | } |
| 147 | if (!iwpm_registered_client(nl_client)) { |
| 148 | err_str = "Unregistered port mapper client"; |
| 149 | goto add_mapping_error; |
| 150 | } |
| 151 | if (!iwpm_valid_pid()) |
| 152 | return 0; |
| 153 | skb = iwpm_create_nlmsg(RDMA_NL_IWPM_ADD_MAPPING, &nlh, nl_client); |
| 154 | if (!skb) { |
| 155 | err_str = "Unable to create a nlmsg"; |
| 156 | goto add_mapping_error; |
| 157 | } |
| 158 | nlh->nlmsg_seq = iwpm_get_nlmsg_seq(); |
| 159 | nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, nl_client, GFP_KERNEL); |
| 160 | if (!nlmsg_request) { |
| 161 | err_str = "Unable to allocate netlink request"; |
| 162 | goto add_mapping_error; |
| 163 | } |
| 164 | msg_seq = atomic_read(&echo_nlmsg_seq); |
| 165 | /* fill in the add mapping message */ |
| 166 | err_str = "Unable to put attribute of the nlmsg"; |
| 167 | ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, |
| 168 | IWPM_NLA_MANAGE_MAPPING_SEQ); |
| 169 | if (ret) |
| 170 | goto add_mapping_error; |
| 171 | ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage), |
| 172 | &pm_msg->loc_addr, IWPM_NLA_MANAGE_ADDR); |
| 173 | if (ret) |
| 174 | goto add_mapping_error; |
| 175 | nlmsg_request->req_buffer = pm_msg; |
| 176 | |
| 177 | ret = ibnl_unicast(skb, nlh, iwpm_user_pid); |
| 178 | if (ret) { |
| 179 | skb = NULL; /* skb is freed in the netlink send-op handling */ |
| 180 | iwpm_user_pid = IWPM_PID_UNDEFINED; |
| 181 | err_str = "Unable to send a nlmsg"; |
| 182 | goto add_mapping_error; |
| 183 | } |
| 184 | ret = iwpm_wait_complete_req(nlmsg_request); |
| 185 | return ret; |
| 186 | add_mapping_error: |
| 187 | pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client); |
| 188 | if (skb) |
| 189 | dev_kfree_skb(skb); |
| 190 | if (nlmsg_request) |
| 191 | iwpm_free_nlmsg_request(&nlmsg_request->kref); |
| 192 | return ret; |
| 193 | } |
| 194 | EXPORT_SYMBOL(iwpm_add_mapping); |
| 195 | |
| 196 | /* |
| 197 | * iwpm_add_and_query_mapping - Send a netlink add and query |
| 198 | * mapping message to the port mapper |
| 199 | * nlmsg attributes: |
| 200 | * [IWPM_NLA_QUERY_MAPPING_SEQ] |
| 201 | * [IWPM_NLA_QUERY_LOCAL_ADDR] |
| 202 | * [IWPM_NLA_QUERY_REMOTE_ADDR] |
| 203 | */ |
| 204 | int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client) |
| 205 | { |
| 206 | struct sk_buff *skb = NULL; |
| 207 | struct iwpm_nlmsg_request *nlmsg_request = NULL; |
| 208 | struct nlmsghdr *nlh; |
| 209 | u32 msg_seq; |
| 210 | const char *err_str = ""; |
| 211 | int ret = -EINVAL; |
| 212 | |
| 213 | if (!iwpm_valid_client(nl_client)) { |
| 214 | err_str = "Invalid port mapper client"; |
| 215 | goto query_mapping_error; |
| 216 | } |
| 217 | if (!iwpm_registered_client(nl_client)) { |
| 218 | err_str = "Unregistered port mapper client"; |
| 219 | goto query_mapping_error; |
| 220 | } |
| 221 | if (!iwpm_valid_pid()) |
| 222 | return 0; |
| 223 | ret = -ENOMEM; |
| 224 | skb = iwpm_create_nlmsg(RDMA_NL_IWPM_QUERY_MAPPING, &nlh, nl_client); |
| 225 | if (!skb) { |
| 226 | err_str = "Unable to create a nlmsg"; |
| 227 | goto query_mapping_error; |
| 228 | } |
| 229 | nlh->nlmsg_seq = iwpm_get_nlmsg_seq(); |
| 230 | nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, |
| 231 | nl_client, GFP_KERNEL); |
| 232 | if (!nlmsg_request) { |
| 233 | err_str = "Unable to allocate netlink request"; |
| 234 | goto query_mapping_error; |
| 235 | } |
| 236 | msg_seq = atomic_read(&echo_nlmsg_seq); |
| 237 | |
| 238 | /* fill in the query message */ |
| 239 | err_str = "Unable to put attribute of the nlmsg"; |
| 240 | ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, |
| 241 | IWPM_NLA_QUERY_MAPPING_SEQ); |
| 242 | if (ret) |
| 243 | goto query_mapping_error; |
| 244 | ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage), |
| 245 | &pm_msg->loc_addr, IWPM_NLA_QUERY_LOCAL_ADDR); |
| 246 | if (ret) |
| 247 | goto query_mapping_error; |
| 248 | ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage), |
| 249 | &pm_msg->rem_addr, IWPM_NLA_QUERY_REMOTE_ADDR); |
| 250 | if (ret) |
| 251 | goto query_mapping_error; |
| 252 | nlmsg_request->req_buffer = pm_msg; |
| 253 | |
| 254 | ret = ibnl_unicast(skb, nlh, iwpm_user_pid); |
| 255 | if (ret) { |
| 256 | skb = NULL; /* skb is freed in the netlink send-op handling */ |
| 257 | err_str = "Unable to send a nlmsg"; |
| 258 | goto query_mapping_error; |
| 259 | } |
| 260 | ret = iwpm_wait_complete_req(nlmsg_request); |
| 261 | return ret; |
| 262 | query_mapping_error: |
| 263 | pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client); |
| 264 | if (skb) |
| 265 | dev_kfree_skb(skb); |
| 266 | if (nlmsg_request) |
| 267 | iwpm_free_nlmsg_request(&nlmsg_request->kref); |
| 268 | return ret; |
| 269 | } |
| 270 | EXPORT_SYMBOL(iwpm_add_and_query_mapping); |
| 271 | |
| 272 | /* |
| 273 | * iwpm_remove_mapping - Send a netlink remove mapping message |
| 274 | * to the port mapper |
| 275 | * nlmsg attributes: |
| 276 | * [IWPM_NLA_MANAGE_MAPPING_SEQ] |
| 277 | * [IWPM_NLA_MANAGE_ADDR] |
| 278 | */ |
| 279 | int iwpm_remove_mapping(struct sockaddr_storage *local_addr, u8 nl_client) |
| 280 | { |
| 281 | struct sk_buff *skb = NULL; |
| 282 | struct nlmsghdr *nlh; |
| 283 | u32 msg_seq; |
| 284 | const char *err_str = ""; |
| 285 | int ret = -EINVAL; |
| 286 | |
| 287 | if (!iwpm_valid_client(nl_client)) { |
| 288 | err_str = "Invalid port mapper client"; |
| 289 | goto remove_mapping_error; |
| 290 | } |
| 291 | if (!iwpm_registered_client(nl_client)) { |
| 292 | err_str = "Unregistered port mapper client"; |
| 293 | goto remove_mapping_error; |
| 294 | } |
| 295 | if (!iwpm_valid_pid()) |
| 296 | return 0; |
| 297 | skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REMOVE_MAPPING, &nlh, nl_client); |
| 298 | if (!skb) { |
| 299 | ret = -ENOMEM; |
| 300 | err_str = "Unable to create a nlmsg"; |
| 301 | goto remove_mapping_error; |
| 302 | } |
| 303 | msg_seq = atomic_read(&echo_nlmsg_seq); |
| 304 | nlh->nlmsg_seq = iwpm_get_nlmsg_seq(); |
| 305 | err_str = "Unable to put attribute of the nlmsg"; |
| 306 | ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, |
| 307 | IWPM_NLA_MANAGE_MAPPING_SEQ); |
| 308 | if (ret) |
| 309 | goto remove_mapping_error; |
| 310 | ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage), |
| 311 | local_addr, IWPM_NLA_MANAGE_ADDR); |
| 312 | if (ret) |
| 313 | goto remove_mapping_error; |
| 314 | |
| 315 | ret = ibnl_unicast(skb, nlh, iwpm_user_pid); |
| 316 | if (ret) { |
| 317 | skb = NULL; /* skb is freed in the netlink send-op handling */ |
| 318 | iwpm_user_pid = IWPM_PID_UNDEFINED; |
| 319 | err_str = "Unable to send a nlmsg"; |
| 320 | goto remove_mapping_error; |
| 321 | } |
| 322 | iwpm_print_sockaddr(local_addr, |
| 323 | "remove_mapping: Local sockaddr:"); |
| 324 | return 0; |
| 325 | remove_mapping_error: |
| 326 | pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client); |
| 327 | if (skb) |
| 328 | dev_kfree_skb_any(skb); |
| 329 | return ret; |
| 330 | } |
| 331 | EXPORT_SYMBOL(iwpm_remove_mapping); |
| 332 | |
| 333 | /* netlink attribute policy for the received response to register pid request */ |
| 334 | static const struct nla_policy resp_reg_policy[IWPM_NLA_RREG_PID_MAX] = { |
| 335 | [IWPM_NLA_RREG_PID_SEQ] = { .type = NLA_U32 }, |
| 336 | [IWPM_NLA_RREG_IBDEV_NAME] = { .type = NLA_STRING, |
| 337 | .len = IWPM_DEVNAME_SIZE - 1 }, |
| 338 | [IWPM_NLA_RREG_ULIB_NAME] = { .type = NLA_STRING, |
| 339 | .len = IWPM_ULIBNAME_SIZE - 1 }, |
| 340 | [IWPM_NLA_RREG_ULIB_VER] = { .type = NLA_U16 }, |
| 341 | [IWPM_NLA_RREG_PID_ERR] = { .type = NLA_U16 } |
| 342 | }; |
| 343 | |
| 344 | /* |
| 345 | * iwpm_register_pid_cb - Process a port mapper response to |
| 346 | * iwpm_register_pid() |
| 347 | */ |
| 348 | int iwpm_register_pid_cb(struct sk_buff *skb, struct netlink_callback *cb) |
| 349 | { |
| 350 | struct iwpm_nlmsg_request *nlmsg_request = NULL; |
| 351 | struct nlattr *nltb[IWPM_NLA_RREG_PID_MAX]; |
| 352 | struct iwpm_dev_data *pm_msg; |
| 353 | char *dev_name, *iwpm_name; |
| 354 | u32 msg_seq; |
| 355 | u8 nl_client; |
| 356 | u16 iwpm_version; |
| 357 | const char *msg_type = "Register Pid response"; |
| 358 | |
| 359 | if (iwpm_parse_nlmsg(cb, IWPM_NLA_RREG_PID_MAX, |
| 360 | resp_reg_policy, nltb, msg_type)) |
| 361 | return -EINVAL; |
| 362 | |
| 363 | msg_seq = nla_get_u32(nltb[IWPM_NLA_RREG_PID_SEQ]); |
| 364 | nlmsg_request = iwpm_find_nlmsg_request(msg_seq); |
| 365 | if (!nlmsg_request) { |
| 366 | pr_info("%s: Could not find a matching request (seq = %u)\n", |
| 367 | __func__, msg_seq); |
| 368 | return -EINVAL; |
| 369 | } |
| 370 | pm_msg = nlmsg_request->req_buffer; |
| 371 | nl_client = nlmsg_request->nl_client; |
| 372 | dev_name = (char *)nla_data(nltb[IWPM_NLA_RREG_IBDEV_NAME]); |
| 373 | iwpm_name = (char *)nla_data(nltb[IWPM_NLA_RREG_ULIB_NAME]); |
| 374 | iwpm_version = nla_get_u16(nltb[IWPM_NLA_RREG_ULIB_VER]); |
| 375 | |
| 376 | /* check device name, ulib name and version */ |
| 377 | if (strcmp(pm_msg->dev_name, dev_name) || |
| 378 | strcmp(iwpm_ulib_name, iwpm_name) || |
| 379 | iwpm_version != iwpm_ulib_version) { |
| 380 | |
| 381 | pr_info("%s: Incorrect info (dev = %s name = %s version = %d)\n", |
| 382 | __func__, dev_name, iwpm_name, iwpm_version); |
| 383 | nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR; |
| 384 | goto register_pid_response_exit; |
| 385 | } |
| 386 | iwpm_user_pid = cb->nlh->nlmsg_pid; |
| 387 | atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq); |
| 388 | pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n", |
| 389 | __func__, iwpm_user_pid); |
| 390 | if (iwpm_valid_client(nl_client)) |
| 391 | iwpm_set_registered(nl_client, 1); |
| 392 | register_pid_response_exit: |
| 393 | nlmsg_request->request_done = 1; |
| 394 | /* always for found nlmsg_request */ |
| 395 | kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request); |
| 396 | barrier(); |
| 397 | wake_up(&nlmsg_request->waitq); |
| 398 | return 0; |
| 399 | } |
| 400 | EXPORT_SYMBOL(iwpm_register_pid_cb); |
| 401 | |
| 402 | /* netlink attribute policy for the received response to add mapping request */ |
| 403 | static const struct nla_policy resp_add_policy[IWPM_NLA_RMANAGE_MAPPING_MAX] = { |
| 404 | [IWPM_NLA_MANAGE_MAPPING_SEQ] = { .type = NLA_U32 }, |
| 405 | [IWPM_NLA_MANAGE_ADDR] = { .len = sizeof(struct sockaddr_storage) }, |
| 406 | [IWPM_NLA_MANAGE_MAPPED_LOC_ADDR] = { .len = sizeof(struct sockaddr_storage) }, |
| 407 | [IWPM_NLA_RMANAGE_MAPPING_ERR] = { .type = NLA_U16 } |
| 408 | }; |
| 409 | |
| 410 | /* |
| 411 | * iwpm_add_mapping_cb - Process a port mapper response to |
| 412 | * iwpm_add_mapping() |
| 413 | */ |
| 414 | int iwpm_add_mapping_cb(struct sk_buff *skb, struct netlink_callback *cb) |
| 415 | { |
| 416 | struct iwpm_sa_data *pm_msg; |
| 417 | struct iwpm_nlmsg_request *nlmsg_request = NULL; |
| 418 | struct nlattr *nltb[IWPM_NLA_RMANAGE_MAPPING_MAX]; |
| 419 | struct sockaddr_storage *local_sockaddr; |
| 420 | struct sockaddr_storage *mapped_sockaddr; |
| 421 | const char *msg_type; |
| 422 | u32 msg_seq; |
| 423 | |
| 424 | msg_type = "Add Mapping response"; |
| 425 | if (iwpm_parse_nlmsg(cb, IWPM_NLA_RMANAGE_MAPPING_MAX, |
| 426 | resp_add_policy, nltb, msg_type)) |
| 427 | return -EINVAL; |
| 428 | |
| 429 | atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq); |
| 430 | |
| 431 | msg_seq = nla_get_u32(nltb[IWPM_NLA_MANAGE_MAPPING_SEQ]); |
| 432 | nlmsg_request = iwpm_find_nlmsg_request(msg_seq); |
| 433 | if (!nlmsg_request) { |
| 434 | pr_info("%s: Could not find a matching request (seq = %u)\n", |
| 435 | __func__, msg_seq); |
| 436 | return -EINVAL; |
| 437 | } |
| 438 | pm_msg = nlmsg_request->req_buffer; |
| 439 | local_sockaddr = (struct sockaddr_storage *) |
| 440 | nla_data(nltb[IWPM_NLA_MANAGE_ADDR]); |
| 441 | mapped_sockaddr = (struct sockaddr_storage *) |
| 442 | nla_data(nltb[IWPM_NLA_MANAGE_MAPPED_LOC_ADDR]); |
| 443 | |
| 444 | if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr)) { |
| 445 | nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR; |
| 446 | goto add_mapping_response_exit; |
| 447 | } |
| 448 | if (mapped_sockaddr->ss_family != local_sockaddr->ss_family) { |
| 449 | pr_info("%s: Sockaddr family doesn't match the requested one\n", |
| 450 | __func__); |
| 451 | nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR; |
| 452 | goto add_mapping_response_exit; |
| 453 | } |
| 454 | memcpy(&pm_msg->mapped_loc_addr, mapped_sockaddr, |
| 455 | sizeof(*mapped_sockaddr)); |
| 456 | iwpm_print_sockaddr(&pm_msg->loc_addr, |
| 457 | "add_mapping: Local sockaddr:"); |
| 458 | iwpm_print_sockaddr(&pm_msg->mapped_loc_addr, |
| 459 | "add_mapping: Mapped local sockaddr:"); |
| 460 | |
| 461 | add_mapping_response_exit: |
| 462 | nlmsg_request->request_done = 1; |
| 463 | /* always for found request */ |
| 464 | kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request); |
| 465 | barrier(); |
| 466 | wake_up(&nlmsg_request->waitq); |
| 467 | return 0; |
| 468 | } |
| 469 | EXPORT_SYMBOL(iwpm_add_mapping_cb); |
| 470 | |
| 471 | /* netlink attribute policy for the response to add and query mapping request |
| 472 | * and response with remote address info */ |
| 473 | static const struct nla_policy resp_query_policy[IWPM_NLA_RQUERY_MAPPING_MAX] = { |
| 474 | [IWPM_NLA_QUERY_MAPPING_SEQ] = { .type = NLA_U32 }, |
| 475 | [IWPM_NLA_QUERY_LOCAL_ADDR] = { .len = sizeof(struct sockaddr_storage) }, |
| 476 | [IWPM_NLA_QUERY_REMOTE_ADDR] = { .len = sizeof(struct sockaddr_storage) }, |
| 477 | [IWPM_NLA_RQUERY_MAPPED_LOC_ADDR] = { .len = sizeof(struct sockaddr_storage) }, |
| 478 | [IWPM_NLA_RQUERY_MAPPED_REM_ADDR] = { .len = sizeof(struct sockaddr_storage) }, |
| 479 | [IWPM_NLA_RQUERY_MAPPING_ERR] = { .type = NLA_U16 } |
| 480 | }; |
| 481 | |
| 482 | /* |
| 483 | * iwpm_add_and_query_mapping_cb - Process a port mapper response to |
| 484 | * iwpm_add_and_query_mapping() |
| 485 | */ |
| 486 | int iwpm_add_and_query_mapping_cb(struct sk_buff *skb, |
| 487 | struct netlink_callback *cb) |
| 488 | { |
| 489 | struct iwpm_sa_data *pm_msg; |
| 490 | struct iwpm_nlmsg_request *nlmsg_request = NULL; |
| 491 | struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX]; |
| 492 | struct sockaddr_storage *local_sockaddr, *remote_sockaddr; |
| 493 | struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr; |
| 494 | const char *msg_type; |
| 495 | u32 msg_seq; |
| 496 | u16 err_code; |
| 497 | |
| 498 | msg_type = "Query Mapping response"; |
| 499 | if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX, |
| 500 | resp_query_policy, nltb, msg_type)) |
| 501 | return -EINVAL; |
| 502 | atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq); |
| 503 | |
| 504 | msg_seq = nla_get_u32(nltb[IWPM_NLA_QUERY_MAPPING_SEQ]); |
| 505 | nlmsg_request = iwpm_find_nlmsg_request(msg_seq); |
| 506 | if (!nlmsg_request) { |
| 507 | pr_info("%s: Could not find a matching request (seq = %u)\n", |
| 508 | __func__, msg_seq); |
| 509 | return -EINVAL; |
| 510 | } |
| 511 | pm_msg = nlmsg_request->req_buffer; |
| 512 | local_sockaddr = (struct sockaddr_storage *) |
| 513 | nla_data(nltb[IWPM_NLA_QUERY_LOCAL_ADDR]); |
| 514 | remote_sockaddr = (struct sockaddr_storage *) |
| 515 | nla_data(nltb[IWPM_NLA_QUERY_REMOTE_ADDR]); |
| 516 | mapped_loc_sockaddr = (struct sockaddr_storage *) |
| 517 | nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]); |
| 518 | mapped_rem_sockaddr = (struct sockaddr_storage *) |
| 519 | nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]); |
| 520 | |
| 521 | err_code = nla_get_u16(nltb[IWPM_NLA_RQUERY_MAPPING_ERR]); |
| 522 | if (err_code == IWPM_REMOTE_QUERY_REJECT) { |
| 523 | pr_info("%s: Received a Reject (pid = %u, echo seq = %u)\n", |
| 524 | __func__, cb->nlh->nlmsg_pid, msg_seq); |
| 525 | nlmsg_request->err_code = IWPM_REMOTE_QUERY_REJECT; |
| 526 | } |
| 527 | if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr) || |
| 528 | iwpm_compare_sockaddr(remote_sockaddr, &pm_msg->rem_addr)) { |
| 529 | pr_info("%s: Incorrect local sockaddr\n", __func__); |
| 530 | nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR; |
| 531 | goto query_mapping_response_exit; |
| 532 | } |
| 533 | if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family || |
| 534 | mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) { |
| 535 | pr_info("%s: Sockaddr family doesn't match the requested one\n", |
| 536 | __func__); |
| 537 | nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR; |
| 538 | goto query_mapping_response_exit; |
| 539 | } |
| 540 | memcpy(&pm_msg->mapped_loc_addr, mapped_loc_sockaddr, |
| 541 | sizeof(*mapped_loc_sockaddr)); |
| 542 | memcpy(&pm_msg->mapped_rem_addr, mapped_rem_sockaddr, |
| 543 | sizeof(*mapped_rem_sockaddr)); |
| 544 | |
| 545 | iwpm_print_sockaddr(&pm_msg->loc_addr, |
| 546 | "query_mapping: Local sockaddr:"); |
| 547 | iwpm_print_sockaddr(&pm_msg->mapped_loc_addr, |
| 548 | "query_mapping: Mapped local sockaddr:"); |
| 549 | iwpm_print_sockaddr(&pm_msg->rem_addr, |
| 550 | "query_mapping: Remote sockaddr:"); |
| 551 | iwpm_print_sockaddr(&pm_msg->mapped_rem_addr, |
| 552 | "query_mapping: Mapped remote sockaddr:"); |
| 553 | query_mapping_response_exit: |
| 554 | nlmsg_request->request_done = 1; |
| 555 | /* always for found request */ |
| 556 | kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request); |
| 557 | barrier(); |
| 558 | wake_up(&nlmsg_request->waitq); |
| 559 | return 0; |
| 560 | } |
| 561 | EXPORT_SYMBOL(iwpm_add_and_query_mapping_cb); |
| 562 | |
| 563 | /* |
| 564 | * iwpm_remote_info_cb - Process a port mapper message, containing |
| 565 | * the remote connecting peer address info |
| 566 | */ |
| 567 | int iwpm_remote_info_cb(struct sk_buff *skb, struct netlink_callback *cb) |
| 568 | { |
| 569 | struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX]; |
| 570 | struct sockaddr_storage *local_sockaddr, *remote_sockaddr; |
| 571 | struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr; |
| 572 | struct iwpm_remote_info *rem_info; |
| 573 | const char *msg_type; |
| 574 | u8 nl_client; |
| 575 | int ret = -EINVAL; |
| 576 | |
| 577 | msg_type = "Remote Mapping info"; |
| 578 | if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX, |
| 579 | resp_query_policy, nltb, msg_type)) |
| 580 | return ret; |
| 581 | |
| 582 | nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type); |
| 583 | if (!iwpm_valid_client(nl_client)) { |
| 584 | pr_info("%s: Invalid port mapper client = %d\n", |
| 585 | __func__, nl_client); |
| 586 | return ret; |
| 587 | } |
| 588 | atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq); |
| 589 | |
| 590 | local_sockaddr = (struct sockaddr_storage *) |
| 591 | nla_data(nltb[IWPM_NLA_QUERY_LOCAL_ADDR]); |
| 592 | remote_sockaddr = (struct sockaddr_storage *) |
| 593 | nla_data(nltb[IWPM_NLA_QUERY_REMOTE_ADDR]); |
| 594 | mapped_loc_sockaddr = (struct sockaddr_storage *) |
| 595 | nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]); |
| 596 | mapped_rem_sockaddr = (struct sockaddr_storage *) |
| 597 | nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]); |
| 598 | |
| 599 | if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family || |
| 600 | mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) { |
| 601 | pr_info("%s: Sockaddr family doesn't match the requested one\n", |
| 602 | __func__); |
| 603 | return ret; |
| 604 | } |
| 605 | rem_info = kzalloc(sizeof(struct iwpm_remote_info), GFP_ATOMIC); |
| 606 | if (!rem_info) { |
| 607 | pr_err("%s: Unable to allocate a remote info\n", __func__); |
| 608 | ret = -ENOMEM; |
| 609 | return ret; |
| 610 | } |
| 611 | memcpy(&rem_info->mapped_loc_sockaddr, mapped_loc_sockaddr, |
| 612 | sizeof(struct sockaddr_storage)); |
| 613 | memcpy(&rem_info->remote_sockaddr, remote_sockaddr, |
| 614 | sizeof(struct sockaddr_storage)); |
| 615 | memcpy(&rem_info->mapped_rem_sockaddr, mapped_rem_sockaddr, |
| 616 | sizeof(struct sockaddr_storage)); |
| 617 | rem_info->nl_client = nl_client; |
| 618 | |
| 619 | iwpm_add_remote_info(rem_info); |
| 620 | |
| 621 | iwpm_print_sockaddr(local_sockaddr, |
| 622 | "remote_info: Local sockaddr:"); |
| 623 | iwpm_print_sockaddr(mapped_loc_sockaddr, |
| 624 | "remote_info: Mapped local sockaddr:"); |
| 625 | iwpm_print_sockaddr(remote_sockaddr, |
| 626 | "remote_info: Remote sockaddr:"); |
| 627 | iwpm_print_sockaddr(mapped_rem_sockaddr, |
| 628 | "remote_info: Mapped remote sockaddr:"); |
| 629 | return ret; |
| 630 | } |
| 631 | EXPORT_SYMBOL(iwpm_remote_info_cb); |
| 632 | |
| 633 | /* netlink attribute policy for the received request for mapping info */ |
| 634 | static const struct nla_policy resp_mapinfo_policy[IWPM_NLA_MAPINFO_REQ_MAX] = { |
| 635 | [IWPM_NLA_MAPINFO_ULIB_NAME] = { .type = NLA_STRING, |
| 636 | .len = IWPM_ULIBNAME_SIZE - 1 }, |
| 637 | [IWPM_NLA_MAPINFO_ULIB_VER] = { .type = NLA_U16 } |
| 638 | }; |
| 639 | |
| 640 | /* |
| 641 | * iwpm_mapping_info_cb - Process a port mapper request for mapping info |
| 642 | */ |
| 643 | int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb) |
| 644 | { |
| 645 | struct nlattr *nltb[IWPM_NLA_MAPINFO_REQ_MAX]; |
| 646 | const char *msg_type = "Mapping Info response"; |
| 647 | int iwpm_pid; |
| 648 | u8 nl_client; |
| 649 | char *iwpm_name; |
| 650 | u16 iwpm_version; |
| 651 | int ret = -EINVAL; |
| 652 | |
| 653 | if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_REQ_MAX, |
| 654 | resp_mapinfo_policy, nltb, msg_type)) { |
| 655 | pr_info("%s: Unable to parse nlmsg\n", __func__); |
| 656 | return ret; |
| 657 | } |
| 658 | iwpm_name = (char *)nla_data(nltb[IWPM_NLA_MAPINFO_ULIB_NAME]); |
| 659 | iwpm_version = nla_get_u16(nltb[IWPM_NLA_MAPINFO_ULIB_VER]); |
| 660 | if (strcmp(iwpm_ulib_name, iwpm_name) || |
| 661 | iwpm_version != iwpm_ulib_version) { |
| 662 | pr_info("%s: Invalid port mapper name = %s version = %d\n", |
| 663 | __func__, iwpm_name, iwpm_version); |
| 664 | return ret; |
| 665 | } |
| 666 | nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type); |
| 667 | if (!iwpm_valid_client(nl_client)) { |
| 668 | pr_info("%s: Invalid port mapper client = %d\n", |
| 669 | __func__, nl_client); |
| 670 | return ret; |
| 671 | } |
| 672 | iwpm_set_registered(nl_client, 0); |
| 673 | atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq); |
| 674 | if (!iwpm_mapinfo_available()) |
| 675 | return 0; |
| 676 | iwpm_pid = cb->nlh->nlmsg_pid; |
| 677 | pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n", |
| 678 | __func__, iwpm_pid); |
| 679 | ret = iwpm_send_mapinfo(nl_client, iwpm_pid); |
| 680 | return ret; |
| 681 | } |
| 682 | EXPORT_SYMBOL(iwpm_mapping_info_cb); |
| 683 | |
| 684 | /* netlink attribute policy for the received mapping info ack */ |
| 685 | static const struct nla_policy ack_mapinfo_policy[IWPM_NLA_MAPINFO_NUM_MAX] = { |
| 686 | [IWPM_NLA_MAPINFO_SEQ] = { .type = NLA_U32 }, |
| 687 | [IWPM_NLA_MAPINFO_SEND_NUM] = { .type = NLA_U32 }, |
| 688 | [IWPM_NLA_MAPINFO_ACK_NUM] = { .type = NLA_U32 } |
| 689 | }; |
| 690 | |
| 691 | /* |
| 692 | * iwpm_ack_mapping_info_cb - Process a port mapper ack for |
| 693 | * the provided mapping info records |
| 694 | */ |
| 695 | int iwpm_ack_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb) |
| 696 | { |
| 697 | struct nlattr *nltb[IWPM_NLA_MAPINFO_NUM_MAX]; |
| 698 | u32 mapinfo_send, mapinfo_ack; |
| 699 | const char *msg_type = "Mapping Info Ack"; |
| 700 | |
| 701 | if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_NUM_MAX, |
| 702 | ack_mapinfo_policy, nltb, msg_type)) |
| 703 | return -EINVAL; |
| 704 | mapinfo_send = nla_get_u32(nltb[IWPM_NLA_MAPINFO_SEND_NUM]); |
| 705 | mapinfo_ack = nla_get_u32(nltb[IWPM_NLA_MAPINFO_ACK_NUM]); |
| 706 | if (mapinfo_ack != mapinfo_send) |
| 707 | pr_info("%s: Invalid mapinfo number (sent = %u ack-ed = %u)\n", |
| 708 | __func__, mapinfo_send, mapinfo_ack); |
| 709 | atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq); |
| 710 | return 0; |
| 711 | } |
| 712 | EXPORT_SYMBOL(iwpm_ack_mapping_info_cb); |
| 713 | |
| 714 | /* netlink attribute policy for the received port mapper error message */ |
| 715 | static const struct nla_policy map_error_policy[IWPM_NLA_ERR_MAX] = { |
| 716 | [IWPM_NLA_ERR_SEQ] = { .type = NLA_U32 }, |
| 717 | [IWPM_NLA_ERR_CODE] = { .type = NLA_U16 }, |
| 718 | }; |
| 719 | |
| 720 | /* |
| 721 | * iwpm_mapping_error_cb - Process a port mapper error message |
| 722 | */ |
| 723 | int iwpm_mapping_error_cb(struct sk_buff *skb, struct netlink_callback *cb) |
| 724 | { |
| 725 | struct iwpm_nlmsg_request *nlmsg_request = NULL; |
| 726 | int nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type); |
| 727 | struct nlattr *nltb[IWPM_NLA_ERR_MAX]; |
| 728 | u32 msg_seq; |
| 729 | u16 err_code; |
| 730 | const char *msg_type = "Mapping Error Msg"; |
| 731 | |
| 732 | if (iwpm_parse_nlmsg(cb, IWPM_NLA_ERR_MAX, |
| 733 | map_error_policy, nltb, msg_type)) |
| 734 | return -EINVAL; |
| 735 | |
| 736 | msg_seq = nla_get_u32(nltb[IWPM_NLA_ERR_SEQ]); |
| 737 | err_code = nla_get_u16(nltb[IWPM_NLA_ERR_CODE]); |
| 738 | pr_info("%s: Received msg seq = %u err code = %u client = %d\n", |
| 739 | __func__, msg_seq, err_code, nl_client); |
| 740 | /* look for nlmsg_request */ |
| 741 | nlmsg_request = iwpm_find_nlmsg_request(msg_seq); |
| 742 | if (!nlmsg_request) { |
| 743 | /* not all errors have associated requests */ |
| 744 | pr_debug("Could not find matching req (seq = %u)\n", msg_seq); |
| 745 | return 0; |
| 746 | } |
| 747 | atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq); |
| 748 | nlmsg_request->err_code = err_code; |
| 749 | nlmsg_request->request_done = 1; |
| 750 | /* always for found request */ |
| 751 | kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request); |
| 752 | barrier(); |
| 753 | wake_up(&nlmsg_request->waitq); |
| 754 | return 0; |
| 755 | } |
| 756 | EXPORT_SYMBOL(iwpm_mapping_error_cb); |