Faisal Latif | f27b474 | 2016-01-20 13:40:04 -0600 | [diff] [blame^] | 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Copyright (c) 2015-2016 Intel Corporation. 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 | * OpenFabrics.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 | |
| 35 | #include <linux/atomic.h> |
| 36 | #include <linux/ip.h> |
| 37 | #include <linux/tcp.h> |
| 38 | #include <linux/init.h> |
| 39 | #include <linux/if_arp.h> |
| 40 | #include <linux/if_vlan.h> |
| 41 | #include <linux/notifier.h> |
| 42 | #include <linux/net.h> |
| 43 | #include <linux/types.h> |
| 44 | #include <linux/timer.h> |
| 45 | #include <linux/time.h> |
| 46 | #include <linux/delay.h> |
| 47 | #include <linux/etherdevice.h> |
| 48 | #include <linux/netdevice.h> |
| 49 | #include <linux/random.h> |
| 50 | #include <linux/list.h> |
| 51 | #include <linux/threads.h> |
| 52 | #include <linux/highmem.h> |
| 53 | #include <net/arp.h> |
| 54 | #include <net/ndisc.h> |
| 55 | #include <net/neighbour.h> |
| 56 | #include <net/route.h> |
| 57 | #include <net/addrconf.h> |
| 58 | #include <net/ip6_route.h> |
| 59 | #include <net/ip_fib.h> |
| 60 | #include <net/tcp.h> |
| 61 | #include <asm/checksum.h> |
| 62 | |
| 63 | #include "i40iw.h" |
| 64 | |
| 65 | static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *); |
| 66 | static void i40iw_cm_post_event(struct i40iw_cm_event *event); |
| 67 | static void i40iw_disconnect_worker(struct work_struct *work); |
| 68 | |
| 69 | /** |
| 70 | * i40iw_free_sqbuf - put back puda buffer if refcount = 0 |
| 71 | * @dev: FPK device |
| 72 | * @buf: puda buffer to free |
| 73 | */ |
| 74 | void i40iw_free_sqbuf(struct i40iw_sc_dev *dev, void *bufp) |
| 75 | { |
| 76 | struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp; |
| 77 | struct i40iw_puda_rsrc *ilq = dev->ilq; |
| 78 | |
| 79 | if (!atomic_dec_return(&buf->refcount)) |
| 80 | i40iw_puda_ret_bufpool(ilq, buf); |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * i40iw_derive_hw_ird_setting - Calculate IRD |
| 85 | * |
| 86 | * @cm_ird: IRD of connection's node |
| 87 | * |
| 88 | * The ird from the connection is rounded to a supported HW |
| 89 | * setting (2,8,32,64) and then encoded for ird_size field of |
| 90 | * qp_ctx |
| 91 | */ |
| 92 | static u8 i40iw_derive_hw_ird_setting(u16 cm_ird) |
| 93 | { |
| 94 | u8 encoded_ird_size; |
| 95 | u8 pof2_cm_ird = 1; |
| 96 | |
| 97 | /* round-off to next powerof2 */ |
| 98 | while (pof2_cm_ird < cm_ird) |
| 99 | pof2_cm_ird *= 2; |
| 100 | |
| 101 | /* ird_size field is encoded in qp_ctx */ |
| 102 | switch (pof2_cm_ird) { |
| 103 | case I40IW_HW_IRD_SETTING_64: |
| 104 | encoded_ird_size = 3; |
| 105 | break; |
| 106 | case I40IW_HW_IRD_SETTING_32: |
| 107 | case I40IW_HW_IRD_SETTING_16: |
| 108 | encoded_ird_size = 2; |
| 109 | break; |
| 110 | case I40IW_HW_IRD_SETTING_8: |
| 111 | case I40IW_HW_IRD_SETTING_4: |
| 112 | encoded_ird_size = 1; |
| 113 | break; |
| 114 | case I40IW_HW_IRD_SETTING_2: |
| 115 | default: |
| 116 | encoded_ird_size = 0; |
| 117 | break; |
| 118 | } |
| 119 | return encoded_ird_size; |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * i40iw_record_ird_ord - Record IRD/ORD passed in |
| 124 | * @cm_node: connection's node |
| 125 | * @conn_ird: connection IRD |
| 126 | * @conn_ord: connection ORD |
| 127 | */ |
| 128 | static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u16 conn_ird, u16 conn_ord) |
| 129 | { |
| 130 | if (conn_ird > I40IW_MAX_IRD_SIZE) |
| 131 | conn_ird = I40IW_MAX_IRD_SIZE; |
| 132 | |
| 133 | if (conn_ord > I40IW_MAX_ORD_SIZE) |
| 134 | conn_ord = I40IW_MAX_ORD_SIZE; |
| 135 | |
| 136 | cm_node->ird_size = conn_ird; |
| 137 | cm_node->ord_size = conn_ord; |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * i40iw_copy_ip_ntohl - change network to host ip |
| 142 | * @dst: host ip |
| 143 | * @src: big endian |
| 144 | */ |
| 145 | void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src) |
| 146 | { |
| 147 | *dst++ = ntohl(*src++); |
| 148 | *dst++ = ntohl(*src++); |
| 149 | *dst++ = ntohl(*src++); |
| 150 | *dst = ntohl(*src); |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * i40iw_copy_ip_htonl - change host addr to network ip |
| 155 | * @dst: host ip |
| 156 | * @src: little endian |
| 157 | */ |
| 158 | static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src) |
| 159 | { |
| 160 | *dst++ = htonl(*src++); |
| 161 | *dst++ = htonl(*src++); |
| 162 | *dst++ = htonl(*src++); |
| 163 | *dst = htonl(*src); |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * i40iw_fill_sockaddr4 - get addr info for passive connection |
| 168 | * @cm_node: connection's node |
| 169 | * @event: upper layer's cm event |
| 170 | */ |
| 171 | static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node, |
| 172 | struct iw_cm_event *event) |
| 173 | { |
| 174 | struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr; |
| 175 | struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr; |
| 176 | |
| 177 | laddr->sin_family = AF_INET; |
| 178 | raddr->sin_family = AF_INET; |
| 179 | |
| 180 | laddr->sin_port = htons(cm_node->loc_port); |
| 181 | raddr->sin_port = htons(cm_node->rem_port); |
| 182 | |
| 183 | laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]); |
| 184 | raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]); |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side |
| 189 | * @cm_node: connection's node |
| 190 | * @event: upper layer's cm event |
| 191 | */ |
| 192 | static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node, |
| 193 | struct iw_cm_event *event) |
| 194 | { |
| 195 | struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr; |
| 196 | struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr; |
| 197 | |
| 198 | laddr6->sin6_family = AF_INET6; |
| 199 | raddr6->sin6_family = AF_INET6; |
| 200 | |
| 201 | laddr6->sin6_port = htons(cm_node->loc_port); |
| 202 | raddr6->sin6_port = htons(cm_node->rem_port); |
| 203 | |
| 204 | i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32, |
| 205 | cm_node->loc_addr); |
| 206 | i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32, |
| 207 | cm_node->rem_addr); |
| 208 | } |
| 209 | |
| 210 | /** |
| 211 | * i40iw_set_sockaddr - Record ip addr and tcp port in a sockaddr storage |
| 212 | * @ip_addr: v4/v6 ip addr |
| 213 | * @port: tcp port |
| 214 | * @addr: sockaddr to store ip/tcp info |
| 215 | */ |
| 216 | static void i40iw_set_sockaddr(u32 *ip_addr, |
| 217 | u16 port, |
| 218 | struct sockaddr_storage *addr, |
| 219 | bool ipv4) |
| 220 | { |
| 221 | if (ipv4) { |
| 222 | struct sockaddr_in *in4_addr = (struct sockaddr_in *)addr; |
| 223 | |
| 224 | in4_addr->sin_family = AF_INET; |
| 225 | in4_addr->sin_addr.s_addr = htonl(ip_addr[0]); |
| 226 | in4_addr->sin_port = htons(port); |
| 227 | } else { |
| 228 | struct sockaddr_in6 *in6_addr = (struct sockaddr_in6 *)addr; |
| 229 | |
| 230 | in6_addr->sin6_family = AF_INET6; |
| 231 | i40iw_copy_ip_htonl(in6_addr->sin6_addr.in6_u.u6_addr32, |
| 232 | ip_addr); |
| 233 | in6_addr->sin6_port = htons(port); |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | /** |
| 238 | * i40iw_get_sockaddr - Get ip addr and tcp port from a sockaddr storage |
| 239 | * @addr: sockaddr to get ip/tcp info |
| 240 | * @ip_addr: v4/v6 ip addr |
| 241 | * @port: tcp port |
| 242 | */ |
| 243 | static void i40iw_get_addrinfo(struct sockaddr_storage *addr, u32 *ip_addr, u16 *port) |
| 244 | { |
| 245 | if (addr->ss_family == AF_INET) { |
| 246 | struct sockaddr_in *in4_addr = (struct sockaddr_in *)addr; |
| 247 | |
| 248 | ip_addr[0] = ntohl(in4_addr->sin_addr.s_addr); |
| 249 | *port = ntohs(in4_addr->sin_port); |
| 250 | } else { |
| 251 | struct sockaddr_in6 *in6_addr = (struct sockaddr_in6 *)addr; |
| 252 | |
| 253 | i40iw_copy_ip_ntohl(ip_addr, |
| 254 | in6_addr->sin6_addr.in6_u.u6_addr32); |
| 255 | *port = ntohs(in6_addr->sin6_port); |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * i40iw_is_wildcard - Check if it is a wildcard ip address |
| 261 | * @addr: sockaddr containing the ip to check |
| 262 | */ |
| 263 | static bool i40iw_is_wildcard(struct sockaddr_storage *addr) |
| 264 | { |
| 265 | if (addr->ss_family == AF_INET) { |
| 266 | struct sockaddr_in *in4_addr = (struct sockaddr_in *)addr; |
| 267 | |
| 268 | return (in4_addr->sin_addr.s_addr == INADDR_ANY); |
| 269 | } else { |
| 270 | struct sockaddr_in6 *in6_addr = (struct sockaddr_in6 *)addr; |
| 271 | |
| 272 | return (ipv6_addr_type(&in6_addr->sin6_addr) == IPV6_ADDR_ANY); |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | /** |
| 277 | * i40iw_create_mapinfo - Create a mapinfo object in the port mapper data base |
| 278 | * @cm_info: contains ip/tcp info |
| 279 | */ |
| 280 | static int i40iw_create_mapinfo(struct i40iw_cm_info *cm_info) |
| 281 | { |
| 282 | struct sockaddr_storage local_sockaddr; |
| 283 | struct sockaddr_storage mapped_sockaddr; |
| 284 | |
| 285 | i40iw_set_sockaddr(cm_info->loc_addr, cm_info->loc_port, |
| 286 | &local_sockaddr, cm_info->ipv4); |
| 287 | i40iw_set_sockaddr(cm_info->map_loc_addr, cm_info->map_loc_port, |
| 288 | &mapped_sockaddr, cm_info->ipv4); |
| 289 | return iwpm_create_mapinfo(&local_sockaddr, |
| 290 | &mapped_sockaddr, |
| 291 | RDMA_NL_I40IW); |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * i40iw_remove_mapinfo - Remove a mapinfo object |
| 296 | * @cm_info: contains ip/tcp info |
| 297 | * |
| 298 | * Removes a mapinfo object from the port mapper data base |
| 299 | * and sends a remove mapping message to the userspace port mapper |
| 300 | */ |
| 301 | static int i40iw_remove_mapinfo(struct i40iw_cm_info *cm_info) |
| 302 | { |
| 303 | struct sockaddr_storage local_sockaddr; |
| 304 | struct sockaddr_storage mapped_sockaddr; |
| 305 | |
| 306 | i40iw_set_sockaddr(cm_info->loc_addr, cm_info->loc_port, |
| 307 | &local_sockaddr, cm_info->ipv4); |
| 308 | i40iw_set_sockaddr(cm_info->map_loc_addr, cm_info->map_loc_port, |
| 309 | &mapped_sockaddr, cm_info->ipv4); |
| 310 | |
| 311 | iwpm_remove_mapinfo(&local_sockaddr, &mapped_sockaddr); |
| 312 | return iwpm_remove_mapping(&local_sockaddr, RDMA_NL_I40IW); |
| 313 | } |
| 314 | |
| 315 | /** |
| 316 | * i40iw_form_reg_msg - Form a port mapper message with dev info |
| 317 | * @iwdev: iWarp device |
| 318 | * @pm_msg: msg to record device data |
| 319 | */ |
| 320 | static void i40iw_form_reg_msg(struct i40iw_device *iwdev, struct iwpm_dev_data *pm_msg) |
| 321 | { |
| 322 | memcpy(pm_msg->dev_name, iwdev->iwibdev->ibdev.name, IWPM_DEVNAME_SIZE); |
| 323 | memcpy(pm_msg->if_name, iwdev->netdev->name, IWPM_IFNAME_SIZE); |
| 324 | } |
| 325 | |
| 326 | /** |
| 327 | * i40iw_form_pm_msg - Form a port mapper message with mapping info |
| 328 | * @cm_info: contains ip/tcp info |
| 329 | * @pm_msg: msg to record ip/tcp info |
| 330 | */ |
| 331 | static void i40iw_form_pm_msg(struct i40iw_cm_info *cm_info, |
| 332 | struct iwpm_sa_data *pm_msg) |
| 333 | { |
| 334 | i40iw_set_sockaddr(cm_info->loc_addr, cm_info->loc_port, |
| 335 | &pm_msg->loc_addr, cm_info->ipv4); |
| 336 | i40iw_set_sockaddr(cm_info->rem_addr, cm_info->rem_port, |
| 337 | &pm_msg->rem_addr, cm_info->ipv4); |
| 338 | } |
| 339 | |
| 340 | /** |
| 341 | * i40iw_record_pm_msg - Record the received mapping info |
| 342 | * @cm_info: ip/tcp info to be updated with mapped info |
| 343 | * @pm_msg: received msg with mapped ip/tcp |
| 344 | */ |
| 345 | static void i40iw_record_pm_msg(struct i40iw_cm_info *cm_info, |
| 346 | struct iwpm_sa_data *pm_msg, |
| 347 | bool remote) |
| 348 | { |
| 349 | i40iw_get_addrinfo(&pm_msg->mapped_loc_addr, |
| 350 | cm_info->map_loc_addr, |
| 351 | &cm_info->map_loc_port); |
| 352 | if (remote) { |
| 353 | i40iw_get_addrinfo(&pm_msg->mapped_rem_addr, |
| 354 | cm_info->map_rem_addr, &cm_info->map_rem_port); |
| 355 | if (i40iw_is_wildcard(&pm_msg->mapped_rem_addr)) |
| 356 | memcpy(cm_info->map_rem_addr, cm_info->rem_addr, |
| 357 | sizeof(cm_info->map_rem_addr)); |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | /** |
| 362 | * i40iw_get_reminfo - Get the address info of the remote connecting peer |
| 363 | * @cm_node: provides mapped ip/tcp info (local and remote) |
| 364 | * |
| 365 | * Gets the actual non-mapped ip/tcp info of the remote connecting peer |
| 366 | * from the port mapper data base |
| 367 | */ |
| 368 | static int i40iw_get_remote_addr(struct i40iw_cm_node *cm_node) |
| 369 | { |
| 370 | struct sockaddr_storage mapped_loc_addr, mapped_rem_addr; |
| 371 | struct sockaddr_storage remote_addr; |
| 372 | int ret; |
| 373 | |
| 374 | i40iw_set_sockaddr(cm_node->map_loc_addr, |
| 375 | cm_node->map_loc_port, |
| 376 | &mapped_loc_addr, |
| 377 | cm_node->ipv4); |
| 378 | i40iw_set_sockaddr(cm_node->map_rem_addr, |
| 379 | cm_node->map_rem_port, |
| 380 | &mapped_rem_addr, |
| 381 | cm_node->ipv4); |
| 382 | ret = iwpm_get_remote_info(&mapped_loc_addr, |
| 383 | &mapped_rem_addr, |
| 384 | &remote_addr, |
| 385 | RDMA_NL_I40IW); |
| 386 | if (ret) |
| 387 | i40iw_debug(cm_node->dev, |
| 388 | I40IW_DEBUG_CM, |
| 389 | "Unable to find remote peer address info\n"); |
| 390 | else |
| 391 | i40iw_get_addrinfo(&remote_addr, |
| 392 | cm_node->rem_addr, |
| 393 | &cm_node->rem_port); |
| 394 | return ret; |
| 395 | } |
| 396 | |
| 397 | /** |
| 398 | * i40iw_init_mapinfo - Initialize the mapped ip/tcp info |
| 399 | * @cm_info: ip/tcp info (actual and mapped) |
| 400 | */ |
| 401 | static void i40iw_init_mapinfo(struct i40iw_cm_info *cm_info) |
| 402 | { |
| 403 | memcpy(cm_info->map_loc_addr, cm_info->loc_addr, |
| 404 | sizeof(cm_info->map_loc_addr)); |
| 405 | memcpy(cm_info->map_rem_addr, cm_info->rem_addr, |
| 406 | sizeof(cm_info->map_rem_addr)); |
| 407 | cm_info->map_loc_port = cm_info->loc_port; |
| 408 | cm_info->map_rem_port = cm_info->rem_port; |
| 409 | } |
| 410 | |
| 411 | /** |
| 412 | * i40iw_get_addr_info |
| 413 | * @cm_node: contains ip/tcp info |
| 414 | * @cm_info: to get a copy of the cm_node ip/tcp info |
| 415 | */ |
| 416 | static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node, |
| 417 | struct i40iw_cm_info *cm_info) |
| 418 | { |
| 419 | cm_info->ipv4 = cm_node->ipv4; |
| 420 | cm_info->vlan_id = cm_node->vlan_id; |
| 421 | memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr)); |
| 422 | memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr)); |
| 423 | memcpy(cm_info->map_loc_addr, cm_node->map_loc_addr, sizeof(cm_info->map_loc_addr)); |
| 424 | memcpy(cm_info->map_rem_addr, cm_node->map_rem_addr, sizeof(cm_info->map_rem_addr)); |
| 425 | cm_info->loc_port = cm_node->loc_port; |
| 426 | cm_info->rem_port = cm_node->rem_port; |
| 427 | cm_info->map_loc_port = cm_node->map_loc_port; |
| 428 | cm_info->map_rem_port = cm_node->map_rem_port; |
| 429 | } |
| 430 | |
| 431 | /** |
| 432 | * i40iw_get_cmevent_info - for cm event upcall |
| 433 | * @cm_node: connection's node |
| 434 | * @cm_id: upper layers cm struct for the event |
| 435 | * @event: upper layer's cm event |
| 436 | */ |
| 437 | static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node, |
| 438 | struct iw_cm_id *cm_id, |
| 439 | struct iw_cm_event *event) |
| 440 | { |
| 441 | memcpy(&event->local_addr, &cm_id->local_addr, |
| 442 | sizeof(event->local_addr)); |
| 443 | memcpy(&event->remote_addr, &cm_id->remote_addr, |
| 444 | sizeof(event->remote_addr)); |
| 445 | if (cm_node) { |
| 446 | event->private_data = (void *)cm_node->pdata_buf; |
| 447 | event->private_data_len = (u8)cm_node->pdata.size; |
| 448 | event->ird = cm_node->ird_size; |
| 449 | event->ord = cm_node->ord_size; |
| 450 | } |
| 451 | } |
| 452 | |
| 453 | /** |
| 454 | * i40iw_send_cm_event - upcall cm's event handler |
| 455 | * @cm_node: connection's node |
| 456 | * @cm_id: upper layer's cm info struct |
| 457 | * @type: Event type to indicate |
| 458 | * @status: status for the event type |
| 459 | */ |
| 460 | static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node, |
| 461 | struct iw_cm_id *cm_id, |
| 462 | enum iw_cm_event_type type, |
| 463 | int status) |
| 464 | { |
| 465 | struct iw_cm_event event; |
| 466 | |
| 467 | memset(&event, 0, sizeof(event)); |
| 468 | event.event = type; |
| 469 | event.status = status; |
| 470 | switch (type) { |
| 471 | case IW_CM_EVENT_CONNECT_REQUEST: |
| 472 | if (cm_node->ipv4) |
| 473 | i40iw_fill_sockaddr4(cm_node, &event); |
| 474 | else |
| 475 | i40iw_fill_sockaddr6(cm_node, &event); |
| 476 | event.provider_data = (void *)cm_node; |
| 477 | event.private_data = (void *)cm_node->pdata_buf; |
| 478 | event.private_data_len = (u8)cm_node->pdata.size; |
| 479 | break; |
| 480 | case IW_CM_EVENT_CONNECT_REPLY: |
| 481 | i40iw_get_cmevent_info(cm_node, cm_id, &event); |
| 482 | break; |
| 483 | case IW_CM_EVENT_ESTABLISHED: |
| 484 | event.ird = cm_node->ird_size; |
| 485 | event.ord = cm_node->ord_size; |
| 486 | break; |
| 487 | case IW_CM_EVENT_DISCONNECT: |
| 488 | break; |
| 489 | case IW_CM_EVENT_CLOSE: |
| 490 | break; |
| 491 | default: |
| 492 | i40iw_pr_err("event type received type = %d\n", type); |
| 493 | return -1; |
| 494 | } |
| 495 | return cm_id->event_handler(cm_id, &event); |
| 496 | } |
| 497 | |
| 498 | /** |
| 499 | * i40iw_create_event - create cm event |
| 500 | * @cm_node: connection's node |
| 501 | * @type: Event type to generate |
| 502 | */ |
| 503 | static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node, |
| 504 | enum i40iw_cm_event_type type) |
| 505 | { |
| 506 | struct i40iw_cm_event *event; |
| 507 | |
| 508 | if (!cm_node->cm_id) |
| 509 | return NULL; |
| 510 | |
| 511 | event = kzalloc(sizeof(*event), GFP_ATOMIC); |
| 512 | |
| 513 | if (!event) |
| 514 | return NULL; |
| 515 | |
| 516 | event->type = type; |
| 517 | event->cm_node = cm_node; |
| 518 | memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr)); |
| 519 | memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr)); |
| 520 | event->cm_info.rem_port = cm_node->rem_port; |
| 521 | event->cm_info.loc_port = cm_node->loc_port; |
| 522 | event->cm_info.cm_id = cm_node->cm_id; |
| 523 | |
| 524 | i40iw_debug(cm_node->dev, |
| 525 | I40IW_DEBUG_CM, |
| 526 | "node=%p event=%p type=%u dst=%pI4 src=%pI4\n", |
| 527 | cm_node, |
| 528 | event, |
| 529 | type, |
| 530 | event->cm_info.loc_addr, |
| 531 | event->cm_info.rem_addr); |
| 532 | |
| 533 | i40iw_cm_post_event(event); |
| 534 | return event; |
| 535 | } |
| 536 | |
| 537 | /** |
| 538 | * i40iw_free_retrans_entry - free send entry |
| 539 | * @cm_node: connection's node |
| 540 | */ |
| 541 | static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node) |
| 542 | { |
| 543 | struct i40iw_sc_dev *dev = cm_node->dev; |
| 544 | struct i40iw_timer_entry *send_entry; |
| 545 | |
| 546 | send_entry = cm_node->send_entry; |
| 547 | if (send_entry) { |
| 548 | cm_node->send_entry = NULL; |
| 549 | i40iw_free_sqbuf(dev, (void *)send_entry->sqbuf); |
| 550 | kfree(send_entry); |
| 551 | atomic_dec(&cm_node->ref_count); |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | /** |
| 556 | * i40iw_cleanup_retrans_entry - free send entry with lock |
| 557 | * @cm_node: connection's node |
| 558 | */ |
| 559 | static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node) |
| 560 | { |
| 561 | unsigned long flags; |
| 562 | |
| 563 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
| 564 | i40iw_free_retrans_entry(cm_node); |
| 565 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
| 566 | } |
| 567 | |
| 568 | static bool is_remote_ne020_or_chelsio(struct i40iw_cm_node *cm_node) |
| 569 | { |
| 570 | if ((cm_node->rem_mac[0] == 0x0) && |
| 571 | (((cm_node->rem_mac[1] == 0x12) && (cm_node->rem_mac[2] == 0x55)) || |
| 572 | ((cm_node->rem_mac[1] == 0x07 && (cm_node->rem_mac[2] == 0x43))))) |
| 573 | return true; |
| 574 | return false; |
| 575 | } |
| 576 | |
| 577 | /** |
| 578 | * i40iw_form_cm_frame - get a free packet and build frame |
| 579 | * @cm_node: connection's node ionfo to use in frame |
| 580 | * @options: pointer to options info |
| 581 | * @hdr: pointer mpa header |
| 582 | * @pdata: pointer to private data |
| 583 | * @flags: indicates FIN or ACK |
| 584 | */ |
| 585 | static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node, |
| 586 | struct i40iw_kmem_info *options, |
| 587 | struct i40iw_kmem_info *hdr, |
| 588 | struct i40iw_kmem_info *pdata, |
| 589 | u8 flags) |
| 590 | { |
| 591 | struct i40iw_puda_buf *sqbuf; |
| 592 | struct i40iw_sc_dev *dev = cm_node->dev; |
| 593 | u8 *buf; |
| 594 | |
| 595 | struct tcphdr *tcph; |
| 596 | struct iphdr *iph; |
| 597 | struct ipv6hdr *ip6h; |
| 598 | struct ethhdr *ethh; |
| 599 | u16 packetsize; |
| 600 | u16 eth_hlen = ETH_HLEN; |
| 601 | u32 opts_len = 0; |
| 602 | u32 pd_len = 0; |
| 603 | u32 hdr_len = 0; |
| 604 | |
| 605 | sqbuf = i40iw_puda_get_bufpool(dev->ilq); |
| 606 | if (!sqbuf) |
| 607 | return NULL; |
| 608 | buf = sqbuf->mem.va; |
| 609 | |
| 610 | if (options) |
| 611 | opts_len = (u32)options->size; |
| 612 | |
| 613 | if (hdr) |
| 614 | hdr_len = hdr->size; |
| 615 | |
| 616 | if (pdata) { |
| 617 | pd_len = pdata->size; |
| 618 | if (!is_remote_ne020_or_chelsio(cm_node)) |
| 619 | pd_len += MPA_ZERO_PAD_LEN; |
| 620 | } |
| 621 | |
| 622 | if (cm_node->vlan_id < VLAN_TAG_PRESENT) |
| 623 | eth_hlen += 4; |
| 624 | |
| 625 | if (cm_node->ipv4) |
| 626 | packetsize = sizeof(*iph) + sizeof(*tcph); |
| 627 | else |
| 628 | packetsize = sizeof(*ip6h) + sizeof(*tcph); |
| 629 | packetsize += opts_len + hdr_len + pd_len; |
| 630 | |
| 631 | memset(buf, 0x00, eth_hlen + packetsize); |
| 632 | |
| 633 | sqbuf->totallen = packetsize + eth_hlen; |
| 634 | sqbuf->maclen = eth_hlen; |
| 635 | sqbuf->tcphlen = sizeof(*tcph) + opts_len; |
| 636 | sqbuf->scratch = (void *)cm_node; |
| 637 | |
| 638 | ethh = (struct ethhdr *)buf; |
| 639 | buf += eth_hlen; |
| 640 | |
| 641 | if (cm_node->ipv4) { |
| 642 | sqbuf->ipv4 = true; |
| 643 | |
| 644 | iph = (struct iphdr *)buf; |
| 645 | buf += sizeof(*iph); |
| 646 | tcph = (struct tcphdr *)buf; |
| 647 | buf += sizeof(*tcph); |
| 648 | |
| 649 | ether_addr_copy(ethh->h_dest, cm_node->rem_mac); |
| 650 | ether_addr_copy(ethh->h_source, cm_node->loc_mac); |
| 651 | if (cm_node->vlan_id < VLAN_TAG_PRESENT) { |
| 652 | ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); |
| 653 | ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id); |
| 654 | |
| 655 | ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP); |
| 656 | } else { |
| 657 | ethh->h_proto = htons(ETH_P_IP); |
| 658 | } |
| 659 | |
| 660 | iph->version = IPVERSION; |
| 661 | iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ |
| 662 | iph->tos = 0; |
| 663 | iph->tot_len = htons(packetsize); |
| 664 | iph->id = htons(++cm_node->tcp_cntxt.loc_id); |
| 665 | |
| 666 | iph->frag_off = htons(0x4000); |
| 667 | iph->ttl = 0x40; |
| 668 | iph->protocol = IPPROTO_TCP; |
| 669 | |
| 670 | iph->saddr = htonl(cm_node->map_loc_addr[0]); |
| 671 | iph->daddr = htonl(cm_node->map_rem_addr[0]); |
| 672 | } else { |
| 673 | sqbuf->ipv4 = false; |
| 674 | ip6h = (struct ipv6hdr *)buf; |
| 675 | buf += sizeof(*ip6h); |
| 676 | tcph = (struct tcphdr *)buf; |
| 677 | buf += sizeof(*tcph); |
| 678 | |
| 679 | ether_addr_copy(ethh->h_dest, cm_node->rem_mac); |
| 680 | ether_addr_copy(ethh->h_source, cm_node->loc_mac); |
| 681 | if (cm_node->vlan_id < VLAN_TAG_PRESENT) { |
| 682 | ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); |
| 683 | ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id); |
| 684 | ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6); |
| 685 | } else { |
| 686 | ethh->h_proto = htons(ETH_P_IPV6); |
| 687 | } |
| 688 | ip6h->version = 6; |
| 689 | ip6h->flow_lbl[0] = 0; |
| 690 | ip6h->flow_lbl[1] = 0; |
| 691 | ip6h->flow_lbl[2] = 0; |
| 692 | ip6h->payload_len = htons(packetsize - sizeof(*ip6h)); |
| 693 | ip6h->nexthdr = 6; |
| 694 | ip6h->hop_limit = 128; |
| 695 | |
| 696 | i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32, |
| 697 | cm_node->map_loc_addr); |
| 698 | i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32, |
| 699 | cm_node->map_rem_addr); |
| 700 | } |
| 701 | |
| 702 | tcph->source = htons(cm_node->map_loc_port); |
| 703 | tcph->dest = htons(cm_node->map_rem_port); |
| 704 | |
| 705 | tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); |
| 706 | |
| 707 | if (flags & SET_ACK) { |
| 708 | cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; |
| 709 | tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); |
| 710 | tcph->ack = 1; |
| 711 | } else { |
| 712 | tcph->ack_seq = 0; |
| 713 | } |
| 714 | |
| 715 | if (flags & SET_SYN) { |
| 716 | cm_node->tcp_cntxt.loc_seq_num++; |
| 717 | tcph->syn = 1; |
| 718 | } else { |
| 719 | cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len; |
| 720 | } |
| 721 | |
| 722 | if (flags & SET_FIN) { |
| 723 | cm_node->tcp_cntxt.loc_seq_num++; |
| 724 | tcph->fin = 1; |
| 725 | } |
| 726 | |
| 727 | if (flags & SET_RST) |
| 728 | tcph->rst = 1; |
| 729 | |
| 730 | tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2); |
| 731 | sqbuf->tcphlen = tcph->doff << 2; |
| 732 | tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); |
| 733 | tcph->urg_ptr = 0; |
| 734 | |
| 735 | if (opts_len) { |
| 736 | memcpy(buf, options->addr, opts_len); |
| 737 | buf += opts_len; |
| 738 | } |
| 739 | |
| 740 | if (hdr_len) { |
| 741 | memcpy(buf, hdr->addr, hdr_len); |
| 742 | buf += hdr_len; |
| 743 | } |
| 744 | |
| 745 | if (pd_len) |
| 746 | memcpy(buf, pdata->addr, pd_len); |
| 747 | |
| 748 | atomic_set(&sqbuf->refcount, 1); |
| 749 | |
| 750 | return sqbuf; |
| 751 | } |
| 752 | |
| 753 | /** |
| 754 | * i40iw_send_reset - Send RST packet |
| 755 | * @cm_node: connection's node |
| 756 | */ |
| 757 | static int i40iw_send_reset(struct i40iw_cm_node *cm_node) |
| 758 | { |
| 759 | struct i40iw_puda_buf *sqbuf; |
| 760 | int flags = SET_RST | SET_ACK; |
| 761 | |
| 762 | sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags); |
| 763 | if (!sqbuf) { |
| 764 | i40iw_pr_err("no sqbuf\n"); |
| 765 | return -1; |
| 766 | } |
| 767 | |
| 768 | return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1); |
| 769 | } |
| 770 | |
| 771 | /** |
| 772 | * i40iw_active_open_err - send event for active side cm error |
| 773 | * @cm_node: connection's node |
| 774 | * @reset: Flag to send reset or not |
| 775 | */ |
| 776 | static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset) |
| 777 | { |
| 778 | i40iw_cleanup_retrans_entry(cm_node); |
| 779 | cm_node->cm_core->stats_connect_errs++; |
| 780 | if (reset) { |
| 781 | i40iw_debug(cm_node->dev, |
| 782 | I40IW_DEBUG_CM, |
| 783 | "%s cm_node=%p state=%d\n", |
| 784 | __func__, |
| 785 | cm_node, |
| 786 | cm_node->state); |
| 787 | atomic_inc(&cm_node->ref_count); |
| 788 | i40iw_send_reset(cm_node); |
| 789 | } |
| 790 | |
| 791 | cm_node->state = I40IW_CM_STATE_CLOSED; |
| 792 | i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); |
| 793 | } |
| 794 | |
| 795 | /** |
| 796 | * i40iw_passive_open_err - handle passive side cm error |
| 797 | * @cm_node: connection's node |
| 798 | * @reset: send reset or just free cm_node |
| 799 | */ |
| 800 | static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset) |
| 801 | { |
| 802 | i40iw_cleanup_retrans_entry(cm_node); |
| 803 | cm_node->cm_core->stats_passive_errs++; |
| 804 | cm_node->state = I40IW_CM_STATE_CLOSED; |
| 805 | i40iw_debug(cm_node->dev, |
| 806 | I40IW_DEBUG_CM, |
| 807 | "%s cm_node=%p state =%d\n", |
| 808 | __func__, |
| 809 | cm_node, |
| 810 | cm_node->state); |
| 811 | if (reset) |
| 812 | i40iw_send_reset(cm_node); |
| 813 | else |
| 814 | i40iw_rem_ref_cm_node(cm_node); |
| 815 | } |
| 816 | |
| 817 | /** |
| 818 | * i40iw_event_connect_error - to create connect error event |
| 819 | * @event: cm information for connect event |
| 820 | */ |
| 821 | static void i40iw_event_connect_error(struct i40iw_cm_event *event) |
| 822 | { |
| 823 | struct i40iw_qp *iwqp; |
| 824 | struct iw_cm_id *cm_id; |
| 825 | |
| 826 | cm_id = event->cm_node->cm_id; |
| 827 | if (!cm_id) |
| 828 | return; |
| 829 | |
| 830 | iwqp = cm_id->provider_data; |
| 831 | |
| 832 | if (!iwqp || !iwqp->iwdev) |
| 833 | return; |
| 834 | |
| 835 | iwqp->cm_id = NULL; |
| 836 | cm_id->provider_data = NULL; |
| 837 | i40iw_send_cm_event(event->cm_node, cm_id, |
| 838 | IW_CM_EVENT_CONNECT_REPLY, |
| 839 | -ECONNRESET); |
| 840 | cm_id->rem_ref(cm_id); |
| 841 | i40iw_rem_ref_cm_node(event->cm_node); |
| 842 | } |
| 843 | |
| 844 | /** |
| 845 | * i40iw_process_options |
| 846 | * @cm_node: connection's node |
| 847 | * @optionsloc: point to start of options |
| 848 | * @optionsize: size of all options |
| 849 | * @syn_packet: flag if syn packet |
| 850 | */ |
| 851 | static int i40iw_process_options(struct i40iw_cm_node *cm_node, |
| 852 | u8 *optionsloc, |
| 853 | u32 optionsize, |
| 854 | u32 syn_packet) |
| 855 | { |
| 856 | u32 tmp; |
| 857 | u32 offset = 0; |
| 858 | union all_known_options *all_options; |
| 859 | char got_mss_option = 0; |
| 860 | |
| 861 | while (offset < optionsize) { |
| 862 | all_options = (union all_known_options *)(optionsloc + offset); |
| 863 | switch (all_options->as_base.optionnum) { |
| 864 | case OPTION_NUMBER_END: |
| 865 | offset = optionsize; |
| 866 | break; |
| 867 | case OPTION_NUMBER_NONE: |
| 868 | offset += 1; |
| 869 | continue; |
| 870 | case OPTION_NUMBER_MSS: |
| 871 | i40iw_debug(cm_node->dev, |
| 872 | I40IW_DEBUG_CM, |
| 873 | "%s: MSS Length: %d Offset: %d Size: %d\n", |
| 874 | __func__, |
| 875 | all_options->as_mss.length, |
| 876 | offset, |
| 877 | optionsize); |
| 878 | got_mss_option = 1; |
| 879 | if (all_options->as_mss.length != 4) |
| 880 | return -1; |
| 881 | tmp = ntohs(all_options->as_mss.mss); |
| 882 | if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss) |
| 883 | cm_node->tcp_cntxt.mss = tmp; |
| 884 | break; |
| 885 | case OPTION_NUMBER_WINDOW_SCALE: |
| 886 | cm_node->tcp_cntxt.snd_wscale = |
| 887 | all_options->as_windowscale.shiftcount; |
| 888 | break; |
| 889 | default: |
| 890 | i40iw_debug(cm_node->dev, |
| 891 | I40IW_DEBUG_CM, |
| 892 | "TCP Option not understood: %x\n", |
| 893 | all_options->as_base.optionnum); |
| 894 | break; |
| 895 | } |
| 896 | offset += all_options->as_base.length; |
| 897 | } |
| 898 | if (!got_mss_option && syn_packet) |
| 899 | cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS; |
| 900 | return 0; |
| 901 | } |
| 902 | |
| 903 | /** |
| 904 | * i40iw_handle_tcp_options - |
| 905 | * @cm_node: connection's node |
| 906 | * @tcph: pointer tcp header |
| 907 | * @optionsize: size of options rcvd |
| 908 | * @passive: active or passive flag |
| 909 | */ |
| 910 | static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node, |
| 911 | struct tcphdr *tcph, |
| 912 | int optionsize, |
| 913 | int passive) |
| 914 | { |
| 915 | u8 *optionsloc = (u8 *)&tcph[1]; |
| 916 | |
| 917 | if (optionsize) { |
| 918 | if (i40iw_process_options(cm_node, |
| 919 | optionsloc, |
| 920 | optionsize, |
| 921 | (u32)tcph->syn)) { |
| 922 | i40iw_debug(cm_node->dev, |
| 923 | I40IW_DEBUG_CM, |
| 924 | "%s: Node %p, Sending RESET\n", |
| 925 | __func__, |
| 926 | cm_node); |
| 927 | if (passive) |
| 928 | i40iw_passive_open_err(cm_node, true); |
| 929 | else |
| 930 | i40iw_active_open_err(cm_node, true); |
| 931 | return -1; |
| 932 | } |
| 933 | } |
| 934 | |
| 935 | cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) << |
| 936 | cm_node->tcp_cntxt.snd_wscale; |
| 937 | |
| 938 | if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) |
| 939 | cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; |
| 940 | return 0; |
| 941 | } |
| 942 | |
| 943 | /** |
| 944 | * i40iw_build_mpa_v1 - build a MPA V1 frame |
| 945 | * @cm_node: connection's node |
| 946 | * @mpa_key: to do read0 or write0 |
| 947 | */ |
| 948 | static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node, |
| 949 | void *start_addr, |
| 950 | u8 mpa_key) |
| 951 | { |
| 952 | struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr; |
| 953 | |
| 954 | switch (mpa_key) { |
| 955 | case MPA_KEY_REQUEST: |
| 956 | memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE); |
| 957 | break; |
| 958 | case MPA_KEY_REPLY: |
| 959 | memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); |
| 960 | break; |
| 961 | default: |
| 962 | break; |
| 963 | } |
| 964 | mpa_frame->flags = IETF_MPA_FLAGS_CRC; |
| 965 | mpa_frame->rev = cm_node->mpa_frame_rev; |
| 966 | mpa_frame->priv_data_len = htons(cm_node->pdata.size); |
| 967 | } |
| 968 | |
| 969 | /** |
| 970 | * i40iw_build_mpa_v2 - build a MPA V2 frame |
| 971 | * @cm_node: connection's node |
| 972 | * @start_addr: buffer start address |
| 973 | * @mpa_key: to do read0 or write0 |
| 974 | */ |
| 975 | static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node, |
| 976 | void *start_addr, |
| 977 | u8 mpa_key) |
| 978 | { |
| 979 | struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr; |
| 980 | struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg; |
| 981 | |
| 982 | /* initialize the upper 5 bytes of the frame */ |
| 983 | i40iw_build_mpa_v1(cm_node, start_addr, mpa_key); |
| 984 | mpa_frame->flags |= IETF_MPA_V2_FLAG; |
| 985 | mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE); |
| 986 | |
| 987 | /* initialize RTR msg */ |
| 988 | if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { |
| 989 | rtr_msg->ctrl_ird = IETF_NO_IRD_ORD; |
| 990 | rtr_msg->ctrl_ord = IETF_NO_IRD_ORD; |
| 991 | } else { |
| 992 | rtr_msg->ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ? |
| 993 | IETF_NO_IRD_ORD : cm_node->ird_size; |
| 994 | rtr_msg->ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ? |
| 995 | IETF_NO_IRD_ORD : cm_node->ord_size; |
| 996 | } |
| 997 | |
| 998 | rtr_msg->ctrl_ird |= IETF_PEER_TO_PEER; |
| 999 | rtr_msg->ctrl_ird |= IETF_FLPDU_ZERO_LEN; |
| 1000 | |
| 1001 | switch (mpa_key) { |
| 1002 | case MPA_KEY_REQUEST: |
| 1003 | rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE; |
| 1004 | rtr_msg->ctrl_ord |= IETF_RDMA0_READ; |
| 1005 | break; |
| 1006 | case MPA_KEY_REPLY: |
| 1007 | switch (cm_node->send_rdma0_op) { |
| 1008 | case SEND_RDMA_WRITE_ZERO: |
| 1009 | rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE; |
| 1010 | break; |
| 1011 | case SEND_RDMA_READ_ZERO: |
| 1012 | rtr_msg->ctrl_ord |= IETF_RDMA0_READ; |
| 1013 | break; |
| 1014 | } |
| 1015 | break; |
| 1016 | default: |
| 1017 | break; |
| 1018 | } |
| 1019 | rtr_msg->ctrl_ird = htons(rtr_msg->ctrl_ird); |
| 1020 | rtr_msg->ctrl_ord = htons(rtr_msg->ctrl_ord); |
| 1021 | } |
| 1022 | |
| 1023 | /** |
| 1024 | * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2 |
| 1025 | * @cm_node: connection's node |
| 1026 | * @mpa: mpa: data buffer |
| 1027 | * @mpa_key: to do read0 or write0 |
| 1028 | */ |
| 1029 | static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node, |
| 1030 | struct i40iw_kmem_info *mpa, |
| 1031 | u8 mpa_key) |
| 1032 | { |
| 1033 | int hdr_len = 0; |
| 1034 | |
| 1035 | switch (cm_node->mpa_frame_rev) { |
| 1036 | case IETF_MPA_V1: |
| 1037 | hdr_len = sizeof(struct ietf_mpa_v1); |
| 1038 | i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key); |
| 1039 | break; |
| 1040 | case IETF_MPA_V2: |
| 1041 | hdr_len = sizeof(struct ietf_mpa_v2); |
| 1042 | i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key); |
| 1043 | break; |
| 1044 | default: |
| 1045 | break; |
| 1046 | } |
| 1047 | |
| 1048 | return hdr_len; |
| 1049 | } |
| 1050 | |
| 1051 | /** |
| 1052 | * i40iw_send_mpa_request - active node send mpa request to passive node |
| 1053 | * @cm_node: connection's node |
| 1054 | */ |
| 1055 | static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node) |
| 1056 | { |
| 1057 | struct i40iw_puda_buf *sqbuf; |
| 1058 | |
| 1059 | if (!cm_node) { |
| 1060 | i40iw_pr_err("cm_node == NULL\n"); |
| 1061 | return -1; |
| 1062 | } |
| 1063 | |
| 1064 | cm_node->mpa_hdr.addr = &cm_node->mpa_frame; |
| 1065 | cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, |
| 1066 | &cm_node->mpa_hdr, |
| 1067 | MPA_KEY_REQUEST); |
| 1068 | if (!cm_node->mpa_hdr.size) { |
| 1069 | i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size); |
| 1070 | return -1; |
| 1071 | } |
| 1072 | |
| 1073 | sqbuf = i40iw_form_cm_frame(cm_node, |
| 1074 | NULL, |
| 1075 | &cm_node->mpa_hdr, |
| 1076 | &cm_node->pdata, |
| 1077 | SET_ACK); |
| 1078 | if (!sqbuf) { |
| 1079 | i40iw_pr_err("sq_buf == NULL\n"); |
| 1080 | return -1; |
| 1081 | } |
| 1082 | |
| 1083 | return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); |
| 1084 | } |
| 1085 | |
| 1086 | /** |
| 1087 | * i40iw_send_mpa_reject - |
| 1088 | * @cm_node: connection's node |
| 1089 | * @pdata: reject data for connection |
| 1090 | * @plen: length of reject data |
| 1091 | */ |
| 1092 | static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node, |
| 1093 | const void *pdata, |
| 1094 | u8 plen) |
| 1095 | { |
| 1096 | struct i40iw_puda_buf *sqbuf; |
| 1097 | struct i40iw_kmem_info priv_info; |
| 1098 | |
| 1099 | cm_node->mpa_hdr.addr = &cm_node->mpa_frame; |
| 1100 | cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, |
| 1101 | &cm_node->mpa_hdr, |
| 1102 | MPA_KEY_REPLY); |
| 1103 | |
| 1104 | cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT; |
| 1105 | priv_info.addr = (void *)pdata; |
| 1106 | priv_info.size = plen; |
| 1107 | |
| 1108 | sqbuf = i40iw_form_cm_frame(cm_node, |
| 1109 | NULL, |
| 1110 | &cm_node->mpa_hdr, |
| 1111 | &priv_info, |
| 1112 | SET_ACK | SET_FIN); |
| 1113 | if (!sqbuf) { |
| 1114 | i40iw_pr_err("no sqbuf\n"); |
| 1115 | return -ENOMEM; |
| 1116 | } |
| 1117 | cm_node->state = I40IW_CM_STATE_FIN_WAIT1; |
| 1118 | return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); |
| 1119 | } |
| 1120 | |
| 1121 | /** |
| 1122 | * recv_mpa - process an IETF MPA frame |
| 1123 | * @cm_node: connection's node |
| 1124 | * @buffer: Data pointer |
| 1125 | * @type: to return accept or reject |
| 1126 | * @len: Len of mpa buffer |
| 1127 | */ |
| 1128 | static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len) |
| 1129 | { |
| 1130 | struct ietf_mpa_v1 *mpa_frame; |
| 1131 | struct ietf_mpa_v2 *mpa_v2_frame; |
| 1132 | struct ietf_rtr_msg *rtr_msg; |
| 1133 | int mpa_hdr_len; |
| 1134 | int priv_data_len; |
| 1135 | |
| 1136 | *type = I40IW_MPA_REQUEST_ACCEPT; |
| 1137 | |
| 1138 | if (len < sizeof(struct ietf_mpa_v1)) { |
| 1139 | i40iw_pr_err("ietf buffer small (%x)\n", len); |
| 1140 | return -1; |
| 1141 | } |
| 1142 | |
| 1143 | mpa_frame = (struct ietf_mpa_v1 *)buffer; |
| 1144 | mpa_hdr_len = sizeof(struct ietf_mpa_v1); |
| 1145 | priv_data_len = ntohs(mpa_frame->priv_data_len); |
| 1146 | |
| 1147 | if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) { |
| 1148 | i40iw_pr_err("large pri_data %d\n", priv_data_len); |
| 1149 | return -1; |
| 1150 | } |
| 1151 | if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) { |
| 1152 | i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev); |
| 1153 | return -1; |
| 1154 | } |
| 1155 | if (mpa_frame->rev > cm_node->mpa_frame_rev) { |
| 1156 | i40iw_pr_err("rev %d\n", mpa_frame->rev); |
| 1157 | return -1; |
| 1158 | } |
| 1159 | cm_node->mpa_frame_rev = mpa_frame->rev; |
| 1160 | |
| 1161 | if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) { |
| 1162 | if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) { |
| 1163 | i40iw_pr_err("Unexpected MPA Key received\n"); |
| 1164 | return -1; |
| 1165 | } |
| 1166 | } else { |
| 1167 | if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) { |
| 1168 | i40iw_pr_err("Unexpected MPA Key received\n"); |
| 1169 | return -1; |
| 1170 | } |
| 1171 | } |
| 1172 | |
| 1173 | if (priv_data_len + mpa_hdr_len > len) { |
| 1174 | i40iw_pr_err("ietf buffer len(%x + %x != %x)\n", |
| 1175 | priv_data_len, mpa_hdr_len, len); |
| 1176 | return -1; |
| 1177 | } |
| 1178 | if (len > MAX_CM_BUFFER) { |
| 1179 | i40iw_pr_err("ietf buffer large len = %d\n", len); |
| 1180 | return -1; |
| 1181 | } |
| 1182 | |
| 1183 | switch (mpa_frame->rev) { |
| 1184 | case IETF_MPA_V2:{ |
| 1185 | u16 ird_size; |
| 1186 | u16 ord_size; |
| 1187 | u16 ctrl_ord; |
| 1188 | u16 ctrl_ird; |
| 1189 | |
| 1190 | mpa_v2_frame = (struct ietf_mpa_v2 *)buffer; |
| 1191 | mpa_hdr_len += IETF_RTR_MSG_SIZE; |
| 1192 | rtr_msg = &mpa_v2_frame->rtr_msg; |
| 1193 | |
| 1194 | /* parse rtr message */ |
| 1195 | ctrl_ord = ntohs(rtr_msg->ctrl_ord); |
| 1196 | ctrl_ird = ntohs(rtr_msg->ctrl_ird); |
| 1197 | ird_size = ctrl_ird & IETF_NO_IRD_ORD; |
| 1198 | ord_size = ctrl_ord & IETF_NO_IRD_ORD; |
| 1199 | |
| 1200 | if (!(ctrl_ird & IETF_PEER_TO_PEER)) |
| 1201 | return -1; |
| 1202 | |
| 1203 | if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) { |
| 1204 | cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD; |
| 1205 | goto negotiate_done; |
| 1206 | } |
| 1207 | |
| 1208 | if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) { |
| 1209 | /* responder */ |
| 1210 | if (!ord_size && (ctrl_ord & IETF_RDMA0_READ)) |
| 1211 | cm_node->ird_size = 1; |
| 1212 | if (cm_node->ord_size > ird_size) |
| 1213 | cm_node->ord_size = ird_size; |
| 1214 | } else { |
| 1215 | /* initiator */ |
| 1216 | if (!ird_size && (ctrl_ord & IETF_RDMA0_READ)) |
| 1217 | return -1; |
| 1218 | if (cm_node->ord_size > ird_size) |
| 1219 | cm_node->ord_size = ird_size; |
| 1220 | |
| 1221 | if (cm_node->ird_size < ord_size) |
| 1222 | /* no resources available */ |
| 1223 | return -1; |
| 1224 | } |
| 1225 | |
| 1226 | negotiate_done: |
| 1227 | if (ctrl_ord & IETF_RDMA0_READ) |
| 1228 | cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; |
| 1229 | else if (ctrl_ord & IETF_RDMA0_WRITE) |
| 1230 | cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO; |
| 1231 | else /* Not supported RDMA0 operation */ |
| 1232 | return -1; |
| 1233 | i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, |
| 1234 | "MPAV2: Negotiated ORD: %d, IRD: %d\n", |
| 1235 | cm_node->ord_size, cm_node->ird_size); |
| 1236 | break; |
| 1237 | } |
| 1238 | break; |
| 1239 | case IETF_MPA_V1: |
| 1240 | default: |
| 1241 | break; |
| 1242 | } |
| 1243 | |
| 1244 | memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len); |
| 1245 | cm_node->pdata.size = priv_data_len; |
| 1246 | |
| 1247 | if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) |
| 1248 | *type = I40IW_MPA_REQUEST_REJECT; |
| 1249 | |
| 1250 | if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS) |
| 1251 | cm_node->snd_mark_en = true; |
| 1252 | |
| 1253 | return 0; |
| 1254 | } |
| 1255 | |
| 1256 | /** |
| 1257 | * i40iw_schedule_cm_timer |
| 1258 | * @@cm_node: connection's node |
| 1259 | * @sqbuf: buffer to send |
| 1260 | * @type: if it es send ot close |
| 1261 | * @send_retrans: if rexmits to be done |
| 1262 | * @close_when_complete: is cm_node to be removed |
| 1263 | * |
| 1264 | * note - cm_node needs to be protected before calling this. Encase in: |
| 1265 | * i40iw_rem_ref_cm_node(cm_core, cm_node); |
| 1266 | * i40iw_schedule_cm_timer(...) |
| 1267 | * atomic_inc(&cm_node->ref_count); |
| 1268 | */ |
| 1269 | int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node, |
| 1270 | struct i40iw_puda_buf *sqbuf, |
| 1271 | enum i40iw_timer_type type, |
| 1272 | int send_retrans, |
| 1273 | int close_when_complete) |
| 1274 | { |
| 1275 | struct i40iw_sc_dev *dev = cm_node->dev; |
| 1276 | struct i40iw_cm_core *cm_core = cm_node->cm_core; |
| 1277 | struct i40iw_timer_entry *new_send; |
| 1278 | int ret = 0; |
| 1279 | u32 was_timer_set; |
| 1280 | unsigned long flags; |
| 1281 | |
| 1282 | new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); |
| 1283 | if (!new_send) { |
| 1284 | i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf); |
| 1285 | return -ENOMEM; |
| 1286 | } |
| 1287 | new_send->retrycount = I40IW_DEFAULT_RETRYS; |
| 1288 | new_send->retranscount = I40IW_DEFAULT_RETRANS; |
| 1289 | new_send->sqbuf = sqbuf; |
| 1290 | new_send->timetosend = jiffies; |
| 1291 | new_send->type = type; |
| 1292 | new_send->send_retrans = send_retrans; |
| 1293 | new_send->close_when_complete = close_when_complete; |
| 1294 | |
| 1295 | if (type == I40IW_TIMER_TYPE_CLOSE) { |
| 1296 | new_send->timetosend += (HZ / 10); |
| 1297 | if (cm_node->close_entry) { |
| 1298 | kfree(new_send); |
| 1299 | i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf); |
| 1300 | i40iw_pr_err("already close entry\n"); |
| 1301 | return -EINVAL; |
| 1302 | } |
| 1303 | cm_node->close_entry = new_send; |
| 1304 | } |
| 1305 | |
| 1306 | if (type == I40IW_TIMER_TYPE_SEND) { |
| 1307 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
| 1308 | cm_node->send_entry = new_send; |
| 1309 | atomic_inc(&cm_node->ref_count); |
| 1310 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
| 1311 | new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT; |
| 1312 | |
| 1313 | atomic_inc(&sqbuf->refcount); |
| 1314 | i40iw_puda_send_buf(dev->ilq, sqbuf); |
| 1315 | if (!send_retrans) { |
| 1316 | i40iw_cleanup_retrans_entry(cm_node); |
| 1317 | if (close_when_complete) |
| 1318 | i40iw_rem_ref_cm_node(cm_node); |
| 1319 | return ret; |
| 1320 | } |
| 1321 | } |
| 1322 | |
| 1323 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
| 1324 | was_timer_set = timer_pending(&cm_core->tcp_timer); |
| 1325 | |
| 1326 | if (!was_timer_set) { |
| 1327 | cm_core->tcp_timer.expires = new_send->timetosend; |
| 1328 | add_timer(&cm_core->tcp_timer); |
| 1329 | } |
| 1330 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| 1331 | |
| 1332 | return ret; |
| 1333 | } |
| 1334 | |
| 1335 | /** |
| 1336 | * i40iw_retrans_expired - Could not rexmit the packet |
| 1337 | * @cm_node: connection's node |
| 1338 | */ |
| 1339 | static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node) |
| 1340 | { |
| 1341 | struct iw_cm_id *cm_id = cm_node->cm_id; |
| 1342 | enum i40iw_cm_node_state state = cm_node->state; |
| 1343 | |
| 1344 | cm_node->state = I40IW_CM_STATE_CLOSED; |
| 1345 | switch (state) { |
| 1346 | case I40IW_CM_STATE_SYN_RCVD: |
| 1347 | case I40IW_CM_STATE_CLOSING: |
| 1348 | i40iw_rem_ref_cm_node(cm_node); |
| 1349 | break; |
| 1350 | case I40IW_CM_STATE_FIN_WAIT1: |
| 1351 | case I40IW_CM_STATE_LAST_ACK: |
| 1352 | if (cm_node->cm_id) |
| 1353 | cm_id->rem_ref(cm_id); |
| 1354 | i40iw_send_reset(cm_node); |
| 1355 | break; |
| 1356 | default: |
| 1357 | atomic_inc(&cm_node->ref_count); |
| 1358 | i40iw_send_reset(cm_node); |
| 1359 | i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); |
| 1360 | break; |
| 1361 | } |
| 1362 | } |
| 1363 | |
| 1364 | /** |
| 1365 | * i40iw_handle_close_entry - for handling retry/timeouts |
| 1366 | * @cm_node: connection's node |
| 1367 | * @rem_node: flag for remove cm_node |
| 1368 | */ |
| 1369 | static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node) |
| 1370 | { |
| 1371 | struct i40iw_timer_entry *close_entry = cm_node->close_entry; |
| 1372 | struct iw_cm_id *cm_id = cm_node->cm_id; |
| 1373 | struct i40iw_qp *iwqp; |
| 1374 | unsigned long flags; |
| 1375 | |
| 1376 | if (!close_entry) |
| 1377 | return; |
| 1378 | iwqp = (struct i40iw_qp *)close_entry->sqbuf; |
| 1379 | if (iwqp) { |
| 1380 | spin_lock_irqsave(&iwqp->lock, flags); |
| 1381 | if (iwqp->cm_id) { |
| 1382 | iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED; |
| 1383 | iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR; |
| 1384 | iwqp->last_aeq = I40IW_AE_RESET_SENT; |
| 1385 | iwqp->ibqp_state = IB_QPS_ERR; |
| 1386 | spin_unlock_irqrestore(&iwqp->lock, flags); |
| 1387 | i40iw_cm_disconn(iwqp); |
| 1388 | } else { |
| 1389 | spin_unlock_irqrestore(&iwqp->lock, flags); |
| 1390 | } |
| 1391 | } else if (rem_node) { |
| 1392 | /* TIME_WAIT state */ |
| 1393 | i40iw_rem_ref_cm_node(cm_node); |
| 1394 | } |
| 1395 | if (cm_id) |
| 1396 | cm_id->rem_ref(cm_id); |
| 1397 | kfree(close_entry); |
| 1398 | cm_node->close_entry = NULL; |
| 1399 | } |
| 1400 | |
| 1401 | /** |
| 1402 | * i40iw_cm_timer_tick - system's timer expired callback |
| 1403 | * @pass: Pointing to cm_core |
| 1404 | */ |
| 1405 | static void i40iw_cm_timer_tick(unsigned long pass) |
| 1406 | { |
| 1407 | unsigned long nexttimeout = jiffies + I40IW_LONG_TIME; |
| 1408 | struct i40iw_cm_node *cm_node; |
| 1409 | struct i40iw_timer_entry *send_entry, *close_entry; |
| 1410 | struct list_head *list_core_temp; |
| 1411 | struct list_head *list_node; |
| 1412 | struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass; |
| 1413 | u32 settimer = 0; |
| 1414 | unsigned long timetosend; |
| 1415 | struct i40iw_sc_dev *dev; |
| 1416 | unsigned long flags; |
| 1417 | |
| 1418 | struct list_head timer_list; |
| 1419 | |
| 1420 | INIT_LIST_HEAD(&timer_list); |
| 1421 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
| 1422 | |
| 1423 | list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) { |
| 1424 | cm_node = container_of(list_node, struct i40iw_cm_node, list); |
| 1425 | if (cm_node->close_entry || cm_node->send_entry) { |
| 1426 | atomic_inc(&cm_node->ref_count); |
| 1427 | list_add(&cm_node->timer_entry, &timer_list); |
| 1428 | } |
| 1429 | } |
| 1430 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| 1431 | |
| 1432 | list_for_each_safe(list_node, list_core_temp, &timer_list) { |
| 1433 | cm_node = container_of(list_node, |
| 1434 | struct i40iw_cm_node, |
| 1435 | timer_entry); |
| 1436 | close_entry = cm_node->close_entry; |
| 1437 | |
| 1438 | if (close_entry) { |
| 1439 | if (time_after(close_entry->timetosend, jiffies)) { |
| 1440 | if (nexttimeout > close_entry->timetosend || |
| 1441 | !settimer) { |
| 1442 | nexttimeout = close_entry->timetosend; |
| 1443 | settimer = 1; |
| 1444 | } |
| 1445 | } else { |
| 1446 | i40iw_handle_close_entry(cm_node, 1); |
| 1447 | } |
| 1448 | } |
| 1449 | |
| 1450 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
| 1451 | |
| 1452 | send_entry = cm_node->send_entry; |
| 1453 | if (!send_entry) |
| 1454 | goto done; |
| 1455 | if (time_after(send_entry->timetosend, jiffies)) { |
| 1456 | if (cm_node->state != I40IW_CM_STATE_OFFLOADED) { |
| 1457 | if ((nexttimeout > send_entry->timetosend) || |
| 1458 | !settimer) { |
| 1459 | nexttimeout = send_entry->timetosend; |
| 1460 | settimer = 1; |
| 1461 | } |
| 1462 | } else { |
| 1463 | i40iw_free_retrans_entry(cm_node); |
| 1464 | } |
| 1465 | goto done; |
| 1466 | } |
| 1467 | |
| 1468 | if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) || |
| 1469 | (cm_node->state == I40IW_CM_STATE_CLOSED)) { |
| 1470 | i40iw_free_retrans_entry(cm_node); |
| 1471 | goto done; |
| 1472 | } |
| 1473 | |
| 1474 | if (!send_entry->retranscount || !send_entry->retrycount) { |
| 1475 | i40iw_free_retrans_entry(cm_node); |
| 1476 | |
| 1477 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
| 1478 | i40iw_retrans_expired(cm_node); |
| 1479 | cm_node->state = I40IW_CM_STATE_CLOSED; |
| 1480 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
| 1481 | goto done; |
| 1482 | } |
| 1483 | cm_node->cm_core->stats_pkt_retrans++; |
| 1484 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
| 1485 | |
| 1486 | dev = cm_node->dev; |
| 1487 | atomic_inc(&send_entry->sqbuf->refcount); |
| 1488 | i40iw_puda_send_buf(dev->ilq, send_entry->sqbuf); |
| 1489 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
| 1490 | if (send_entry->send_retrans) { |
| 1491 | send_entry->retranscount--; |
| 1492 | timetosend = (I40IW_RETRY_TIMEOUT << |
| 1493 | (I40IW_DEFAULT_RETRANS - |
| 1494 | send_entry->retranscount)); |
| 1495 | |
| 1496 | send_entry->timetosend = jiffies + |
| 1497 | min(timetosend, I40IW_MAX_TIMEOUT); |
| 1498 | if (nexttimeout > send_entry->timetosend || !settimer) { |
| 1499 | nexttimeout = send_entry->timetosend; |
| 1500 | settimer = 1; |
| 1501 | } |
| 1502 | } else { |
| 1503 | int close_when_complete; |
| 1504 | |
| 1505 | close_when_complete = send_entry->close_when_complete; |
| 1506 | i40iw_debug(cm_node->dev, |
| 1507 | I40IW_DEBUG_CM, |
| 1508 | "cm_node=%p state=%d\n", |
| 1509 | cm_node, |
| 1510 | cm_node->state); |
| 1511 | i40iw_free_retrans_entry(cm_node); |
| 1512 | if (close_when_complete) |
| 1513 | i40iw_rem_ref_cm_node(cm_node); |
| 1514 | } |
| 1515 | done: |
| 1516 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
| 1517 | i40iw_rem_ref_cm_node(cm_node); |
| 1518 | } |
| 1519 | |
| 1520 | if (settimer) { |
| 1521 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
| 1522 | if (!timer_pending(&cm_core->tcp_timer)) { |
| 1523 | cm_core->tcp_timer.expires = nexttimeout; |
| 1524 | add_timer(&cm_core->tcp_timer); |
| 1525 | } |
| 1526 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| 1527 | } |
| 1528 | } |
| 1529 | |
| 1530 | /** |
| 1531 | * i40iw_send_syn - send SYN packet |
| 1532 | * @cm_node: connection's node |
| 1533 | * @sendack: flag to set ACK bit or not |
| 1534 | */ |
| 1535 | int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack) |
| 1536 | { |
| 1537 | struct i40iw_puda_buf *sqbuf; |
| 1538 | int flags = SET_SYN; |
| 1539 | char optionsbuffer[sizeof(struct option_mss) + |
| 1540 | sizeof(struct option_windowscale) + |
| 1541 | sizeof(struct option_base) + TCP_OPTIONS_PADDING]; |
| 1542 | struct i40iw_kmem_info opts; |
| 1543 | |
| 1544 | int optionssize = 0; |
| 1545 | /* Sending MSS option */ |
| 1546 | union all_known_options *options; |
| 1547 | |
| 1548 | opts.addr = optionsbuffer; |
| 1549 | if (!cm_node) { |
| 1550 | i40iw_pr_err("no cm_node\n"); |
| 1551 | return -EINVAL; |
| 1552 | } |
| 1553 | |
| 1554 | options = (union all_known_options *)&optionsbuffer[optionssize]; |
| 1555 | options->as_mss.optionnum = OPTION_NUMBER_MSS; |
| 1556 | options->as_mss.length = sizeof(struct option_mss); |
| 1557 | options->as_mss.mss = htons(cm_node->tcp_cntxt.mss); |
| 1558 | optionssize += sizeof(struct option_mss); |
| 1559 | |
| 1560 | options = (union all_known_options *)&optionsbuffer[optionssize]; |
| 1561 | options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE; |
| 1562 | options->as_windowscale.length = sizeof(struct option_windowscale); |
| 1563 | options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; |
| 1564 | optionssize += sizeof(struct option_windowscale); |
| 1565 | options = (union all_known_options *)&optionsbuffer[optionssize]; |
| 1566 | options->as_end = OPTION_NUMBER_END; |
| 1567 | optionssize += 1; |
| 1568 | |
| 1569 | if (sendack) |
| 1570 | flags |= SET_ACK; |
| 1571 | |
| 1572 | opts.size = optionssize; |
| 1573 | |
| 1574 | sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags); |
| 1575 | if (!sqbuf) { |
| 1576 | i40iw_pr_err("no sqbuf\n"); |
| 1577 | return -1; |
| 1578 | } |
| 1579 | return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); |
| 1580 | } |
| 1581 | |
| 1582 | /** |
| 1583 | * i40iw_send_ack - Send ACK packet |
| 1584 | * @cm_node: connection's node |
| 1585 | */ |
| 1586 | static void i40iw_send_ack(struct i40iw_cm_node *cm_node) |
| 1587 | { |
| 1588 | struct i40iw_puda_buf *sqbuf; |
| 1589 | |
| 1590 | sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK); |
| 1591 | if (sqbuf) |
| 1592 | i40iw_puda_send_buf(cm_node->dev->ilq, sqbuf); |
| 1593 | else |
| 1594 | i40iw_pr_err("no sqbuf\n"); |
| 1595 | } |
| 1596 | |
| 1597 | /** |
| 1598 | * i40iw_send_fin - Send FIN pkt |
| 1599 | * @cm_node: connection's node |
| 1600 | */ |
| 1601 | static int i40iw_send_fin(struct i40iw_cm_node *cm_node) |
| 1602 | { |
| 1603 | struct i40iw_puda_buf *sqbuf; |
| 1604 | |
| 1605 | sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN); |
| 1606 | if (!sqbuf) { |
| 1607 | i40iw_pr_err("no sqbuf\n"); |
| 1608 | return -1; |
| 1609 | } |
| 1610 | return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); |
| 1611 | } |
| 1612 | |
| 1613 | /** |
| 1614 | * i40iw_find_node - find a cm node that matches the reference cm node |
| 1615 | * @cm_core: cm's core |
| 1616 | * @rem_port: remote tcp port num |
| 1617 | * @rem_addr: remote ip addr |
| 1618 | * @loc_port: local tcp port num |
| 1619 | * @loc_addr: loc ip addr |
| 1620 | * @add_refcnt: flag to increment refcount of cm_node |
| 1621 | */ |
| 1622 | struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core, |
| 1623 | u16 rem_port, |
| 1624 | u32 *rem_addr, |
| 1625 | u16 loc_port, |
| 1626 | u32 *loc_addr, |
| 1627 | bool add_refcnt) |
| 1628 | { |
| 1629 | struct list_head *hte; |
| 1630 | struct i40iw_cm_node *cm_node; |
| 1631 | unsigned long flags; |
| 1632 | |
| 1633 | hte = &cm_core->connected_nodes; |
| 1634 | |
| 1635 | /* walk list and find cm_node associated with this session ID */ |
| 1636 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
| 1637 | list_for_each_entry(cm_node, hte, list) { |
| 1638 | if (!memcmp(cm_node->map_loc_addr, loc_addr, sizeof(cm_node->map_loc_addr)) && |
| 1639 | (cm_node->map_loc_port == loc_port) && |
| 1640 | !memcmp(cm_node->map_rem_addr, rem_addr, sizeof(cm_node->map_rem_addr)) && |
| 1641 | (cm_node->map_rem_port == rem_port)) { |
| 1642 | if (add_refcnt) |
| 1643 | atomic_inc(&cm_node->ref_count); |
| 1644 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| 1645 | return cm_node; |
| 1646 | } |
| 1647 | } |
| 1648 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| 1649 | |
| 1650 | /* no owner node */ |
| 1651 | return NULL; |
| 1652 | } |
| 1653 | |
| 1654 | /** |
| 1655 | * i40iw_find_listener - find a cm node listening on this addr-port pair |
| 1656 | * @cm_core: cm's core |
| 1657 | * @dst_port: listener tcp port num |
| 1658 | * @dst_addr: listener ip addr |
| 1659 | * @listener_state: state to match with listen node's |
| 1660 | */ |
| 1661 | static struct i40iw_cm_listener *i40iw_find_listener( |
| 1662 | struct i40iw_cm_core *cm_core, |
| 1663 | u32 *dst_addr, |
| 1664 | u16 dst_port, |
| 1665 | u16 vlan_id, |
| 1666 | enum i40iw_cm_listener_state |
| 1667 | listener_state, |
| 1668 | bool mapped) |
| 1669 | { |
| 1670 | struct i40iw_cm_listener *listen_node; |
| 1671 | static const u32 ip_zero[4] = { 0, 0, 0, 0 }; |
| 1672 | u32 listen_addr[4]; |
| 1673 | u16 listen_port; |
| 1674 | unsigned long flags; |
| 1675 | |
| 1676 | /* walk list and find cm_node associated with this session ID */ |
| 1677 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
| 1678 | list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { |
| 1679 | if (mapped) { |
| 1680 | memcpy(listen_addr, listen_node->map_loc_addr, sizeof(listen_addr)); |
| 1681 | listen_port = listen_node->map_loc_port; |
| 1682 | } else { |
| 1683 | memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); |
| 1684 | listen_port = listen_node->loc_port; |
| 1685 | } |
| 1686 | /* compare node pair, return node handle if a match */ |
| 1687 | if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) || |
| 1688 | !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) && |
| 1689 | (listen_port == dst_port) && |
| 1690 | (listener_state & listen_node->listener_state)) { |
| 1691 | atomic_inc(&listen_node->ref_count); |
| 1692 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| 1693 | return listen_node; |
| 1694 | } |
| 1695 | } |
| 1696 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| 1697 | return NULL; |
| 1698 | } |
| 1699 | |
| 1700 | /** |
| 1701 | * i40iw_add_hte_node - add a cm node to the hash table |
| 1702 | * @cm_core: cm's core |
| 1703 | * @cm_node: connection's node |
| 1704 | */ |
| 1705 | static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core, |
| 1706 | struct i40iw_cm_node *cm_node) |
| 1707 | { |
| 1708 | struct list_head *hte; |
| 1709 | unsigned long flags; |
| 1710 | |
| 1711 | if (!cm_node || !cm_core) { |
| 1712 | i40iw_pr_err("cm_node or cm_core == NULL\n"); |
| 1713 | return; |
| 1714 | } |
| 1715 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
| 1716 | |
| 1717 | /* get a handle on the hash table element (list head for this slot) */ |
| 1718 | hte = &cm_core->connected_nodes; |
| 1719 | list_add_tail(&cm_node->list, hte); |
| 1720 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| 1721 | } |
| 1722 | |
| 1723 | /** |
| 1724 | * listen_port_in_use - determine if port is in use |
| 1725 | * @port: Listen port number |
| 1726 | */ |
| 1727 | static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port) |
| 1728 | { |
| 1729 | struct i40iw_cm_listener *listen_node; |
| 1730 | unsigned long flags; |
| 1731 | bool ret = false; |
| 1732 | |
| 1733 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
| 1734 | list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { |
| 1735 | if (listen_node->map_loc_port == port) { |
| 1736 | ret = true; |
| 1737 | break; |
| 1738 | } |
| 1739 | } |
| 1740 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| 1741 | return ret; |
| 1742 | } |
| 1743 | |
| 1744 | /** |
| 1745 | * i40iw_del_multiple_qhash - Remove qhash and child listens |
| 1746 | * @iwdev: iWarp device |
| 1747 | * @cm_info: CM info for parent listen node |
| 1748 | * @cm_parent_listen_node: The parent listen node |
| 1749 | */ |
| 1750 | static enum i40iw_status_code i40iw_del_multiple_qhash( |
| 1751 | struct i40iw_device *iwdev, |
| 1752 | struct i40iw_cm_info *cm_info, |
| 1753 | struct i40iw_cm_listener *cm_parent_listen_node) |
| 1754 | { |
| 1755 | struct i40iw_cm_listener *child_listen_node; |
| 1756 | enum i40iw_status_code ret = I40IW_ERR_CONFIG; |
| 1757 | struct list_head *pos, *tpos; |
| 1758 | unsigned long flags; |
| 1759 | |
| 1760 | spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); |
| 1761 | list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) { |
| 1762 | child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list); |
| 1763 | if (child_listen_node->ipv4) |
| 1764 | i40iw_debug(&iwdev->sc_dev, |
| 1765 | I40IW_DEBUG_CM, |
| 1766 | "removing child listen for IP=%pI4, port=%d, vlan=%d\n", |
| 1767 | child_listen_node->loc_addr, |
| 1768 | child_listen_node->loc_port, |
| 1769 | child_listen_node->vlan_id); |
| 1770 | else |
| 1771 | i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, |
| 1772 | "removing child listen for IP=%pI6, port=%d, vlan=%d\n", |
| 1773 | child_listen_node->loc_addr, |
| 1774 | child_listen_node->loc_port, |
| 1775 | child_listen_node->vlan_id); |
| 1776 | list_del(pos); |
| 1777 | memcpy(cm_info->map_loc_addr, child_listen_node->map_loc_addr, |
| 1778 | sizeof(cm_info->map_loc_addr)); |
| 1779 | memcpy(cm_info->loc_addr, child_listen_node->loc_addr, |
| 1780 | sizeof(cm_info->loc_addr)); |
| 1781 | cm_info->vlan_id = child_listen_node->vlan_id; |
| 1782 | ret = i40iw_manage_qhash(iwdev, cm_info, |
| 1783 | I40IW_QHASH_TYPE_TCP_SYN, |
| 1784 | I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false); |
| 1785 | kfree(child_listen_node); |
| 1786 | cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; |
| 1787 | i40iw_debug(&iwdev->sc_dev, |
| 1788 | I40IW_DEBUG_CM, |
| 1789 | "freed pointer = %p\n", |
| 1790 | child_listen_node); |
| 1791 | } |
| 1792 | spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); |
| 1793 | |
| 1794 | return ret; |
| 1795 | } |
| 1796 | |
| 1797 | /** |
| 1798 | * i40iw_netdev_vlan_ipv6 - Gets the netdev and mac |
| 1799 | * @addr: local IPv6 address |
| 1800 | * @vlan_id: vlan id for the given IPv6 address |
| 1801 | * @mac: mac address for the given IPv6 address |
| 1802 | * |
| 1803 | * Returns the net_device of the IPv6 address and also sets the |
| 1804 | * vlan id and mac for that address. |
| 1805 | */ |
| 1806 | static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac) |
| 1807 | { |
| 1808 | struct net_device *ip_dev = NULL; |
| 1809 | #if IS_ENABLED(CONFIG_IPV6) |
| 1810 | struct in6_addr laddr6; |
| 1811 | |
| 1812 | i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr); |
| 1813 | if (vlan_id) |
| 1814 | *vlan_id = I40IW_NO_VLAN; |
| 1815 | if (mac) |
| 1816 | eth_zero_addr(mac); |
| 1817 | rcu_read_lock(); |
| 1818 | for_each_netdev_rcu(&init_net, ip_dev) { |
| 1819 | if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) { |
| 1820 | if (vlan_id) |
| 1821 | *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); |
| 1822 | if (ip_dev->dev_addr && mac) |
| 1823 | ether_addr_copy(mac, ip_dev->dev_addr); |
| 1824 | break; |
| 1825 | } |
| 1826 | } |
| 1827 | rcu_read_unlock(); |
| 1828 | #endif |
| 1829 | return ip_dev; |
| 1830 | } |
| 1831 | |
| 1832 | /** |
| 1833 | * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address |
| 1834 | * @addr: local IPv4 address |
| 1835 | */ |
| 1836 | static u16 i40iw_get_vlan_ipv4(u32 *addr) |
| 1837 | { |
| 1838 | struct net_device *netdev; |
| 1839 | u16 vlan_id = I40IW_NO_VLAN; |
| 1840 | |
| 1841 | netdev = ip_dev_find(&init_net, htonl(addr[0])); |
| 1842 | if (netdev) { |
| 1843 | vlan_id = rdma_vlan_dev_vlan_id(netdev); |
| 1844 | dev_put(netdev); |
| 1845 | } |
| 1846 | return vlan_id; |
| 1847 | } |
| 1848 | |
| 1849 | /** |
| 1850 | * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6 |
| 1851 | * @iwdev: iWarp device |
| 1852 | * @cm_info: CM info for parent listen node |
| 1853 | * @cm_parent_listen_node: The parent listen node |
| 1854 | * |
| 1855 | * Adds a qhash and a child listen node for every IPv6 address |
| 1856 | * on the adapter and adds the associated qhash filter |
| 1857 | */ |
| 1858 | static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev, |
| 1859 | struct i40iw_cm_info *cm_info, |
| 1860 | struct i40iw_cm_listener *cm_parent_listen_node) |
| 1861 | { |
| 1862 | struct net_device *ip_dev; |
| 1863 | struct inet6_dev *idev; |
| 1864 | struct inet6_ifaddr *ifp; |
| 1865 | enum i40iw_status_code ret = 0; |
| 1866 | struct i40iw_cm_listener *child_listen_node; |
| 1867 | unsigned long flags; |
| 1868 | |
| 1869 | rtnl_lock(); |
| 1870 | for_each_netdev_rcu(&init_net, ip_dev) { |
| 1871 | if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) && |
| 1872 | (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) || |
| 1873 | (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) { |
| 1874 | idev = __in6_dev_get(ip_dev); |
| 1875 | if (!idev) { |
| 1876 | i40iw_pr_err("idev == NULL\n"); |
| 1877 | break; |
| 1878 | } |
| 1879 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
| 1880 | i40iw_debug(&iwdev->sc_dev, |
| 1881 | I40IW_DEBUG_CM, |
| 1882 | "IP=%pI6, vlan_id=%d, MAC=%pM\n", |
| 1883 | &ifp->addr, |
| 1884 | rdma_vlan_dev_vlan_id(ip_dev), |
| 1885 | ip_dev->dev_addr); |
| 1886 | child_listen_node = |
| 1887 | kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); |
| 1888 | i40iw_debug(&iwdev->sc_dev, |
| 1889 | I40IW_DEBUG_CM, |
| 1890 | "Allocating child listener %p\n", |
| 1891 | child_listen_node); |
| 1892 | if (!child_listen_node) { |
| 1893 | i40iw_pr_err("listener memory allocation\n"); |
| 1894 | ret = I40IW_ERR_NO_MEMORY; |
| 1895 | goto exit; |
| 1896 | } |
| 1897 | cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); |
| 1898 | cm_parent_listen_node->vlan_id = cm_info->vlan_id; |
| 1899 | |
| 1900 | memcpy(child_listen_node, cm_parent_listen_node, |
| 1901 | sizeof(*child_listen_node)); |
| 1902 | |
| 1903 | i40iw_copy_ip_ntohl(child_listen_node->loc_addr, |
| 1904 | ifp->addr.in6_u.u6_addr32); |
| 1905 | i40iw_copy_ip_ntohl(child_listen_node->map_loc_addr, |
| 1906 | ifp->addr.in6_u.u6_addr32); |
| 1907 | |
| 1908 | memcpy(cm_info->map_loc_addr, child_listen_node->map_loc_addr, |
| 1909 | sizeof(cm_info->map_loc_addr)); |
| 1910 | memcpy(cm_info->loc_addr, child_listen_node->loc_addr, |
| 1911 | sizeof(cm_info->loc_addr)); |
| 1912 | |
| 1913 | ret = i40iw_manage_qhash(iwdev, cm_info, |
| 1914 | I40IW_QHASH_TYPE_TCP_SYN, |
| 1915 | I40IW_QHASH_MANAGE_TYPE_ADD, |
| 1916 | NULL, true); |
| 1917 | if (!ret) { |
| 1918 | spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); |
| 1919 | list_add(&child_listen_node->child_listen_list, |
| 1920 | &cm_parent_listen_node->child_listen_list); |
| 1921 | spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); |
| 1922 | cm_parent_listen_node->cm_core->stats_listen_nodes_created++; |
| 1923 | } else { |
| 1924 | kfree(child_listen_node); |
| 1925 | } |
| 1926 | } |
| 1927 | } |
| 1928 | } |
| 1929 | exit: |
| 1930 | rtnl_unlock(); |
| 1931 | return ret; |
| 1932 | } |
| 1933 | |
| 1934 | /** |
| 1935 | * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4 |
| 1936 | * @iwdev: iWarp device |
| 1937 | * @cm_info: CM info for parent listen node |
| 1938 | * @cm_parent_listen_node: The parent listen node |
| 1939 | * |
| 1940 | * Adds a qhash and a child listen node for every IPv4 address |
| 1941 | * on the adapter and adds the associated qhash filter |
| 1942 | */ |
| 1943 | static enum i40iw_status_code i40iw_add_mqh_4( |
| 1944 | struct i40iw_device *iwdev, |
| 1945 | struct i40iw_cm_info *cm_info, |
| 1946 | struct i40iw_cm_listener *cm_parent_listen_node) |
| 1947 | { |
| 1948 | struct net_device *dev; |
| 1949 | struct in_device *idev; |
| 1950 | struct i40iw_cm_listener *child_listen_node; |
| 1951 | enum i40iw_status_code ret = 0; |
| 1952 | unsigned long flags; |
| 1953 | |
| 1954 | rtnl_lock(); |
| 1955 | for_each_netdev(&init_net, dev) { |
| 1956 | if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) && |
| 1957 | (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) || |
| 1958 | (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) { |
| 1959 | idev = in_dev_get(dev); |
| 1960 | for_ifa(idev) { |
| 1961 | i40iw_debug(&iwdev->sc_dev, |
| 1962 | I40IW_DEBUG_CM, |
| 1963 | "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", |
| 1964 | &ifa->ifa_address, |
| 1965 | rdma_vlan_dev_vlan_id(dev), |
| 1966 | dev->dev_addr); |
| 1967 | child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); |
| 1968 | cm_parent_listen_node->cm_core->stats_listen_nodes_created++; |
| 1969 | i40iw_debug(&iwdev->sc_dev, |
| 1970 | I40IW_DEBUG_CM, |
| 1971 | "Allocating child listener %p\n", |
| 1972 | child_listen_node); |
| 1973 | if (!child_listen_node) { |
| 1974 | i40iw_pr_err("listener memory allocation\n"); |
| 1975 | in_dev_put(idev); |
| 1976 | ret = I40IW_ERR_NO_MEMORY; |
| 1977 | goto exit; |
| 1978 | } |
| 1979 | cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev); |
| 1980 | cm_parent_listen_node->vlan_id = cm_info->vlan_id; |
| 1981 | memcpy(child_listen_node, |
| 1982 | cm_parent_listen_node, |
| 1983 | sizeof(*child_listen_node)); |
| 1984 | |
| 1985 | child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address); |
| 1986 | child_listen_node->map_loc_addr[0] = ntohl(ifa->ifa_address); |
| 1987 | |
| 1988 | memcpy(cm_info->map_loc_addr, child_listen_node->map_loc_addr, |
| 1989 | sizeof(cm_info->map_loc_addr)); |
| 1990 | memcpy(cm_info->loc_addr, child_listen_node->loc_addr, |
| 1991 | sizeof(cm_info->loc_addr)); |
| 1992 | |
| 1993 | ret = i40iw_manage_qhash(iwdev, |
| 1994 | cm_info, |
| 1995 | I40IW_QHASH_TYPE_TCP_SYN, |
| 1996 | I40IW_QHASH_MANAGE_TYPE_ADD, |
| 1997 | NULL, |
| 1998 | true); |
| 1999 | if (!ret) { |
| 2000 | spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); |
| 2001 | list_add(&child_listen_node->child_listen_list, |
| 2002 | &cm_parent_listen_node->child_listen_list); |
| 2003 | spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); |
| 2004 | } else { |
| 2005 | kfree(child_listen_node); |
| 2006 | cm_parent_listen_node->cm_core->stats_listen_nodes_created--; |
| 2007 | } |
| 2008 | } |
| 2009 | endfor_ifa(idev); |
| 2010 | in_dev_put(idev); |
| 2011 | } |
| 2012 | } |
| 2013 | exit: |
| 2014 | rtnl_unlock(); |
| 2015 | return ret; |
| 2016 | } |
| 2017 | |
| 2018 | /** |
| 2019 | * i40iw_dec_refcnt_listen - delete listener and associated cm nodes |
| 2020 | * @cm_core: cm's core |
| 2021 | * @free_hanging_nodes: to free associated cm_nodes |
| 2022 | * @apbvt_del: flag to delete the apbvt |
| 2023 | */ |
| 2024 | static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core, |
| 2025 | struct i40iw_cm_listener *listener, |
| 2026 | int free_hanging_nodes, bool apbvt_del) |
| 2027 | { |
| 2028 | int ret = -EINVAL; |
| 2029 | int err = 0; |
| 2030 | struct list_head *list_pos; |
| 2031 | struct list_head *list_temp; |
| 2032 | struct i40iw_cm_node *cm_node; |
| 2033 | struct list_head reset_list; |
| 2034 | struct i40iw_cm_info nfo; |
| 2035 | struct i40iw_cm_node *loopback; |
| 2036 | enum i40iw_cm_node_state old_state; |
| 2037 | unsigned long flags; |
| 2038 | |
| 2039 | /* free non-accelerated child nodes for this listener */ |
| 2040 | INIT_LIST_HEAD(&reset_list); |
| 2041 | if (free_hanging_nodes) { |
| 2042 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
| 2043 | list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) { |
| 2044 | cm_node = container_of(list_pos, struct i40iw_cm_node, list); |
| 2045 | if ((cm_node->listener == listener) && !cm_node->accelerated) { |
| 2046 | atomic_inc(&cm_node->ref_count); |
| 2047 | list_add(&cm_node->reset_entry, &reset_list); |
| 2048 | } |
| 2049 | } |
| 2050 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| 2051 | } |
| 2052 | |
| 2053 | list_for_each_safe(list_pos, list_temp, &reset_list) { |
| 2054 | cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry); |
| 2055 | loopback = cm_node->loopbackpartner; |
| 2056 | if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) { |
| 2057 | i40iw_rem_ref_cm_node(cm_node); |
| 2058 | } else { |
| 2059 | if (!loopback) { |
| 2060 | i40iw_cleanup_retrans_entry(cm_node); |
| 2061 | err = i40iw_send_reset(cm_node); |
| 2062 | if (err) { |
| 2063 | cm_node->state = I40IW_CM_STATE_CLOSED; |
| 2064 | i40iw_pr_err("send reset\n"); |
| 2065 | } else { |
| 2066 | old_state = cm_node->state; |
| 2067 | cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; |
| 2068 | if (old_state != I40IW_CM_STATE_MPAREQ_RCVD) |
| 2069 | i40iw_rem_ref_cm_node(cm_node); |
| 2070 | } |
| 2071 | } else { |
| 2072 | struct i40iw_cm_event event; |
| 2073 | |
| 2074 | event.cm_node = loopback; |
| 2075 | memcpy(event.cm_info.rem_addr, |
| 2076 | loopback->rem_addr, sizeof(event.cm_info.rem_addr)); |
| 2077 | memcpy(event.cm_info.loc_addr, |
| 2078 | loopback->loc_addr, sizeof(event.cm_info.loc_addr)); |
| 2079 | event.cm_info.rem_port = loopback->rem_port; |
| 2080 | event.cm_info.loc_port = loopback->loc_port; |
| 2081 | event.cm_info.cm_id = loopback->cm_id; |
| 2082 | event.cm_info.ipv4 = loopback->ipv4; |
| 2083 | atomic_inc(&loopback->ref_count); |
| 2084 | loopback->state = I40IW_CM_STATE_CLOSED; |
| 2085 | i40iw_event_connect_error(&event); |
| 2086 | cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; |
| 2087 | i40iw_rem_ref_cm_node(cm_node); |
| 2088 | } |
| 2089 | } |
| 2090 | } |
| 2091 | |
| 2092 | if (!atomic_dec_return(&listener->ref_count)) { |
| 2093 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
| 2094 | list_del(&listener->list); |
| 2095 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| 2096 | |
| 2097 | if (listener->iwdev) { |
| 2098 | if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->map_loc_port)) |
| 2099 | i40iw_manage_apbvt(listener->iwdev, |
| 2100 | listener->map_loc_port, |
| 2101 | I40IW_MANAGE_APBVT_DEL); |
| 2102 | |
| 2103 | memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); |
| 2104 | memcpy(nfo.map_loc_addr, listener->map_loc_addr, sizeof(nfo.map_loc_addr)); |
| 2105 | nfo.loc_port = listener->loc_port; |
| 2106 | nfo.map_loc_port = listener->map_loc_port; |
| 2107 | nfo.ipv4 = listener->ipv4; |
| 2108 | nfo.vlan_id = listener->vlan_id; |
| 2109 | |
| 2110 | i40iw_remove_mapinfo(&nfo); |
| 2111 | |
| 2112 | if (!list_empty(&listener->child_listen_list)) { |
| 2113 | i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener); |
| 2114 | } else { |
| 2115 | if (listener->qhash_set) |
| 2116 | i40iw_manage_qhash(listener->iwdev, |
| 2117 | &nfo, |
| 2118 | I40IW_QHASH_TYPE_TCP_SYN, |
| 2119 | I40IW_QHASH_MANAGE_TYPE_DELETE, |
| 2120 | NULL, |
| 2121 | false); |
| 2122 | } |
| 2123 | } |
| 2124 | |
| 2125 | cm_core->stats_listen_destroyed++; |
| 2126 | kfree(listener); |
| 2127 | cm_core->stats_listen_nodes_destroyed++; |
| 2128 | listener = NULL; |
| 2129 | ret = 0; |
| 2130 | } |
| 2131 | |
| 2132 | if (listener) { |
| 2133 | if (atomic_read(&listener->pend_accepts_cnt) > 0) |
| 2134 | i40iw_debug(cm_core->dev, |
| 2135 | I40IW_DEBUG_CM, |
| 2136 | "%s: listener (%p) pending accepts=%u\n", |
| 2137 | __func__, |
| 2138 | listener, |
| 2139 | atomic_read(&listener->pend_accepts_cnt)); |
| 2140 | } |
| 2141 | |
| 2142 | return ret; |
| 2143 | } |
| 2144 | |
| 2145 | /** |
| 2146 | * i40iw_cm_del_listen - delete a linstener |
| 2147 | * @cm_core: cm's core |
| 2148 | * @listener: passive connection's listener |
| 2149 | * @apbvt_del: flag to delete apbvt |
| 2150 | */ |
| 2151 | static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core, |
| 2152 | struct i40iw_cm_listener *listener, |
| 2153 | bool apbvt_del) |
| 2154 | { |
| 2155 | listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE; |
| 2156 | listener->cm_id = NULL; /* going to be destroyed pretty soon */ |
| 2157 | return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); |
| 2158 | } |
| 2159 | |
| 2160 | /** |
| 2161 | * i40iw_addr_resolve_neigh - resolve neighbor address |
| 2162 | * @iwdev: iwarp device structure |
| 2163 | * @src_ip: local ip address |
| 2164 | * @dst_ip: remote ip address |
| 2165 | * @arpindex: if there is an arp entry |
| 2166 | */ |
| 2167 | static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev, |
| 2168 | u32 src_ip, |
| 2169 | u32 dst_ip, |
| 2170 | int arpindex) |
| 2171 | { |
| 2172 | struct rtable *rt; |
| 2173 | struct neighbour *neigh; |
| 2174 | int rc = arpindex; |
| 2175 | struct net_device *netdev = iwdev->netdev; |
| 2176 | __be32 dst_ipaddr = htonl(dst_ip); |
| 2177 | __be32 src_ipaddr = htonl(src_ip); |
| 2178 | |
| 2179 | rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0); |
| 2180 | if (IS_ERR(rt)) { |
| 2181 | i40iw_pr_err("ip_route_output\n"); |
| 2182 | return rc; |
| 2183 | } |
| 2184 | |
| 2185 | if (netif_is_bond_slave(netdev)) |
| 2186 | netdev = netdev_master_upper_dev_get(netdev); |
| 2187 | |
| 2188 | neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); |
| 2189 | |
| 2190 | rcu_read_lock(); |
| 2191 | if (neigh) { |
| 2192 | if (neigh->nud_state & NUD_VALID) { |
| 2193 | if (arpindex >= 0) { |
| 2194 | if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr, |
| 2195 | neigh->ha)) |
| 2196 | /* Mac address same as arp table */ |
| 2197 | goto resolve_neigh_exit; |
| 2198 | i40iw_manage_arp_cache(iwdev, |
| 2199 | iwdev->arp_table[arpindex].mac_addr, |
| 2200 | &dst_ip, |
| 2201 | true, |
| 2202 | I40IW_ARP_DELETE); |
| 2203 | } |
| 2204 | |
| 2205 | i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD); |
| 2206 | rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE); |
| 2207 | } else { |
| 2208 | neigh_event_send(neigh, NULL); |
| 2209 | } |
| 2210 | } |
| 2211 | resolve_neigh_exit: |
| 2212 | |
| 2213 | rcu_read_unlock(); |
| 2214 | if (neigh) |
| 2215 | neigh_release(neigh); |
| 2216 | |
| 2217 | ip_rt_put(rt); |
| 2218 | return rc; |
| 2219 | } |
| 2220 | |
| 2221 | /** |
| 2222 | * i40iw_get_dst_ipv6 |
| 2223 | */ |
| 2224 | #if IS_ENABLED(CONFIG_IPV6) |
| 2225 | static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr, |
| 2226 | struct sockaddr_in6 *dst_addr) |
| 2227 | { |
| 2228 | struct dst_entry *dst; |
| 2229 | struct flowi6 fl6; |
| 2230 | |
| 2231 | memset(&fl6, 0, sizeof(fl6)); |
| 2232 | fl6.daddr = dst_addr->sin6_addr; |
| 2233 | fl6.saddr = src_addr->sin6_addr; |
| 2234 | if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) |
| 2235 | fl6.flowi6_oif = dst_addr->sin6_scope_id; |
| 2236 | |
| 2237 | dst = ip6_route_output(&init_net, NULL, &fl6); |
| 2238 | return dst; |
| 2239 | } |
| 2240 | #endif |
| 2241 | |
| 2242 | /** |
| 2243 | * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address |
| 2244 | * @iwdev: iwarp device structure |
| 2245 | * @dst_ip: remote ip address |
| 2246 | * @arpindex: if there is an arp entry |
| 2247 | */ |
| 2248 | #if IS_ENABLED(CONFIG_IPV6) |
| 2249 | static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev, |
| 2250 | u32 *src, |
| 2251 | u32 *dest, |
| 2252 | int arpindex) |
| 2253 | { |
| 2254 | struct neighbour *neigh; |
| 2255 | int rc = arpindex; |
| 2256 | struct net_device *netdev = iwdev->netdev; |
| 2257 | struct dst_entry *dst; |
| 2258 | struct sockaddr_in6 dst_addr; |
| 2259 | struct sockaddr_in6 src_addr; |
| 2260 | |
| 2261 | memset(&dst_addr, 0, sizeof(dst_addr)); |
| 2262 | dst_addr.sin6_family = AF_INET6; |
| 2263 | i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest); |
| 2264 | memset(&src_addr, 0, sizeof(src_addr)); |
| 2265 | src_addr.sin6_family = AF_INET6; |
| 2266 | i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src); |
| 2267 | dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr); |
| 2268 | if (!dst || dst->error) { |
| 2269 | if (dst) { |
| 2270 | dst_release(dst); |
| 2271 | i40iw_pr_err("ip6_route_output returned dst->error = %d\n", |
| 2272 | dst->error); |
| 2273 | } |
| 2274 | return rc; |
| 2275 | } |
| 2276 | |
| 2277 | if (netif_is_bond_slave(netdev)) |
| 2278 | netdev = netdev_master_upper_dev_get(netdev); |
| 2279 | |
| 2280 | neigh = dst_neigh_lookup(dst, &dst_addr); |
| 2281 | |
| 2282 | rcu_read_lock(); |
| 2283 | if (neigh) { |
| 2284 | i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha); |
| 2285 | if (neigh->nud_state & NUD_VALID) { |
| 2286 | if (arpindex >= 0) { |
| 2287 | if (ether_addr_equal |
| 2288 | (iwdev->arp_table[arpindex].mac_addr, |
| 2289 | neigh->ha)) { |
| 2290 | /* Mac address same as in arp table */ |
| 2291 | goto resolve_neigh_exit6; |
| 2292 | } |
| 2293 | i40iw_manage_arp_cache(iwdev, |
| 2294 | iwdev->arp_table[arpindex].mac_addr, |
| 2295 | dest, |
| 2296 | false, |
| 2297 | I40IW_ARP_DELETE); |
| 2298 | } |
| 2299 | i40iw_manage_arp_cache(iwdev, |
| 2300 | neigh->ha, |
| 2301 | dest, |
| 2302 | false, |
| 2303 | I40IW_ARP_ADD); |
| 2304 | rc = i40iw_arp_table(iwdev, |
| 2305 | dest, |
| 2306 | false, |
| 2307 | NULL, |
| 2308 | I40IW_ARP_RESOLVE); |
| 2309 | } else { |
| 2310 | neigh_event_send(neigh, NULL); |
| 2311 | } |
| 2312 | } |
| 2313 | |
| 2314 | resolve_neigh_exit6: |
| 2315 | rcu_read_unlock(); |
| 2316 | if (neigh) |
| 2317 | neigh_release(neigh); |
| 2318 | dst_release(dst); |
| 2319 | return rc; |
| 2320 | } |
| 2321 | #endif |
| 2322 | |
| 2323 | /** |
| 2324 | * i40iw_ipv4_is_loopback - check if loopback |
| 2325 | * @loc_addr: local addr to compare |
| 2326 | * @rem_addr: remote address |
| 2327 | */ |
| 2328 | static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr) |
| 2329 | { |
| 2330 | return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); |
| 2331 | } |
| 2332 | |
| 2333 | /** |
| 2334 | * i40iw_ipv6_is_loopback - check if loopback |
| 2335 | * @loc_addr: local addr to compare |
| 2336 | * @rem_addr: remote address |
| 2337 | */ |
| 2338 | static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr) |
| 2339 | { |
| 2340 | struct in6_addr raddr6; |
| 2341 | |
| 2342 | i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr); |
| 2343 | return (!memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6)); |
| 2344 | } |
| 2345 | |
| 2346 | /** |
| 2347 | * i40iw_make_cm_node - create a new instance of a cm node |
| 2348 | * @cm_core: cm's core |
| 2349 | * @iwdev: iwarp device structure |
| 2350 | * @cm_info: quad info for connection |
| 2351 | * @listener: passive connection's listener |
| 2352 | */ |
| 2353 | static struct i40iw_cm_node *i40iw_make_cm_node( |
| 2354 | struct i40iw_cm_core *cm_core, |
| 2355 | struct i40iw_device *iwdev, |
| 2356 | struct i40iw_cm_info *cm_info, |
| 2357 | struct i40iw_cm_listener *listener) |
| 2358 | { |
| 2359 | struct i40iw_cm_node *cm_node; |
| 2360 | struct timespec ts; |
| 2361 | int oldarpindex; |
| 2362 | int arpindex; |
| 2363 | struct net_device *netdev = iwdev->netdev; |
| 2364 | |
| 2365 | /* create an hte and cm_node for this instance */ |
| 2366 | cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); |
| 2367 | if (!cm_node) |
| 2368 | return NULL; |
| 2369 | |
| 2370 | /* set our node specific transport info */ |
| 2371 | cm_node->ipv4 = cm_info->ipv4; |
| 2372 | cm_node->vlan_id = cm_info->vlan_id; |
| 2373 | memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); |
| 2374 | memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); |
| 2375 | memcpy(cm_node->map_loc_addr, cm_info->map_loc_addr, |
| 2376 | sizeof(cm_node->map_loc_addr)); |
| 2377 | memcpy(cm_node->map_rem_addr, cm_info->map_rem_addr, |
| 2378 | sizeof(cm_node->map_rem_addr)); |
| 2379 | cm_node->loc_port = cm_info->loc_port; |
| 2380 | cm_node->rem_port = cm_info->rem_port; |
| 2381 | cm_node->map_loc_port = cm_info->map_loc_port; |
| 2382 | cm_node->map_rem_port = cm_info->map_rem_port; |
| 2383 | |
| 2384 | cm_node->mpa_frame_rev = iwdev->mpa_version; |
| 2385 | cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; |
| 2386 | cm_node->ird_size = I40IW_MAX_IRD_SIZE; |
| 2387 | cm_node->ord_size = I40IW_MAX_ORD_SIZE; |
| 2388 | |
| 2389 | cm_node->listener = listener; |
| 2390 | cm_node->cm_id = cm_info->cm_id; |
| 2391 | ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); |
| 2392 | spin_lock_init(&cm_node->retrans_list_lock); |
| 2393 | |
| 2394 | atomic_set(&cm_node->ref_count, 1); |
| 2395 | /* associate our parent CM core */ |
| 2396 | cm_node->cm_core = cm_core; |
| 2397 | cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID; |
| 2398 | cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; |
| 2399 | cm_node->tcp_cntxt.rcv_wnd = |
| 2400 | I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE; |
| 2401 | ts = current_kernel_time(); |
| 2402 | cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec); |
| 2403 | cm_node->tcp_cntxt.mss = iwdev->mss; |
| 2404 | |
| 2405 | cm_node->iwdev = iwdev; |
| 2406 | cm_node->dev = &iwdev->sc_dev; |
| 2407 | |
| 2408 | if ((cm_node->ipv4 && |
| 2409 | i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || |
| 2410 | (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr, |
| 2411 | cm_node->rem_addr))) { |
| 2412 | arpindex = i40iw_arp_table(iwdev, |
| 2413 | cm_node->map_rem_addr, |
| 2414 | false, |
| 2415 | NULL, |
| 2416 | I40IW_ARP_RESOLVE); |
| 2417 | } else { |
| 2418 | oldarpindex = i40iw_arp_table(iwdev, |
| 2419 | cm_node->map_rem_addr, |
| 2420 | false, |
| 2421 | NULL, |
| 2422 | I40IW_ARP_RESOLVE); |
| 2423 | if (cm_node->ipv4) |
| 2424 | arpindex = i40iw_addr_resolve_neigh(iwdev, |
| 2425 | cm_info->map_loc_addr[0], |
| 2426 | cm_info->map_rem_addr[0], |
| 2427 | oldarpindex); |
| 2428 | #if IS_ENABLED(CONFIG_IPV6) |
| 2429 | else |
| 2430 | arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev, |
| 2431 | cm_info->map_loc_addr, |
| 2432 | cm_info->map_rem_addr, |
| 2433 | oldarpindex); |
| 2434 | #endif |
| 2435 | } |
| 2436 | if (arpindex < 0) { |
| 2437 | i40iw_pr_err("cm_node arpindex\n"); |
| 2438 | kfree(cm_node); |
| 2439 | return NULL; |
| 2440 | } |
| 2441 | ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr); |
| 2442 | i40iw_add_hte_node(cm_core, cm_node); |
| 2443 | cm_core->stats_nodes_created++; |
| 2444 | return cm_node; |
| 2445 | } |
| 2446 | |
| 2447 | /** |
| 2448 | * i40iw_rem_ref_cm_node - destroy an instance of a cm node |
| 2449 | * @cm_node: connection's node |
| 2450 | */ |
| 2451 | static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node) |
| 2452 | { |
| 2453 | struct i40iw_cm_core *cm_core = cm_node->cm_core; |
| 2454 | struct i40iw_qp *iwqp; |
| 2455 | struct i40iw_cm_info nfo; |
| 2456 | unsigned long flags; |
| 2457 | |
| 2458 | spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags); |
| 2459 | if (atomic_dec_return(&cm_node->ref_count)) { |
| 2460 | spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); |
| 2461 | return; |
| 2462 | } |
| 2463 | list_del(&cm_node->list); |
| 2464 | spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); |
| 2465 | |
| 2466 | /* if the node is destroyed before connection was accelerated */ |
| 2467 | if (!cm_node->accelerated && cm_node->accept_pend) { |
| 2468 | pr_err("node destroyed before established\n"); |
| 2469 | atomic_dec(&cm_node->listener->pend_accepts_cnt); |
| 2470 | } |
| 2471 | if (cm_node->close_entry) |
| 2472 | i40iw_handle_close_entry(cm_node, 0); |
| 2473 | if (cm_node->listener) { |
| 2474 | i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); |
| 2475 | } else { |
| 2476 | if (!i40iw_listen_port_in_use(cm_core, htons(cm_node->map_loc_port)) && |
| 2477 | cm_node->apbvt_set && cm_node->iwdev) { |
| 2478 | i40iw_manage_apbvt(cm_node->iwdev, |
| 2479 | cm_node->map_loc_port, |
| 2480 | I40IW_MANAGE_APBVT_DEL); |
| 2481 | i40iw_get_addr_info(cm_node, &nfo); |
| 2482 | i40iw_remove_mapinfo(&nfo); |
| 2483 | if (cm_node->qhash_set) { |
| 2484 | i40iw_manage_qhash(cm_node->iwdev, |
| 2485 | &nfo, |
| 2486 | I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
| 2487 | I40IW_QHASH_MANAGE_TYPE_DELETE, |
| 2488 | NULL, |
| 2489 | false); |
| 2490 | cm_node->qhash_set = 0; |
| 2491 | } |
| 2492 | } |
| 2493 | } |
| 2494 | |
| 2495 | iwqp = cm_node->iwqp; |
| 2496 | if (iwqp) { |
| 2497 | iwqp->cm_node = NULL; |
| 2498 | i40iw_rem_ref(&iwqp->ibqp); |
| 2499 | cm_node->iwqp = NULL; |
| 2500 | } else if (cm_node->qhash_set) { |
| 2501 | i40iw_get_addr_info(cm_node, &nfo); |
| 2502 | i40iw_remove_mapinfo(&nfo); |
| 2503 | i40iw_manage_qhash(cm_node->iwdev, |
| 2504 | &nfo, |
| 2505 | I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
| 2506 | I40IW_QHASH_MANAGE_TYPE_DELETE, |
| 2507 | NULL, |
| 2508 | false); |
| 2509 | cm_node->qhash_set = 0; |
| 2510 | } |
| 2511 | |
| 2512 | cm_node->cm_core->stats_nodes_destroyed++; |
| 2513 | kfree(cm_node); |
| 2514 | } |
| 2515 | |
| 2516 | /** |
| 2517 | * i40iw_handle_fin_pkt - FIN packet received |
| 2518 | * @cm_node: connection's node |
| 2519 | */ |
| 2520 | static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node) |
| 2521 | { |
| 2522 | u32 ret; |
| 2523 | |
| 2524 | switch (cm_node->state) { |
| 2525 | case I40IW_CM_STATE_SYN_RCVD: |
| 2526 | case I40IW_CM_STATE_SYN_SENT: |
| 2527 | case I40IW_CM_STATE_ESTABLISHED: |
| 2528 | case I40IW_CM_STATE_MPAREJ_RCVD: |
| 2529 | cm_node->tcp_cntxt.rcv_nxt++; |
| 2530 | i40iw_cleanup_retrans_entry(cm_node); |
| 2531 | cm_node->state = I40IW_CM_STATE_LAST_ACK; |
| 2532 | i40iw_send_fin(cm_node); |
| 2533 | break; |
| 2534 | case I40IW_CM_STATE_MPAREQ_SENT: |
| 2535 | i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); |
| 2536 | cm_node->tcp_cntxt.rcv_nxt++; |
| 2537 | i40iw_cleanup_retrans_entry(cm_node); |
| 2538 | cm_node->state = I40IW_CM_STATE_CLOSED; |
| 2539 | atomic_inc(&cm_node->ref_count); |
| 2540 | i40iw_send_reset(cm_node); |
| 2541 | break; |
| 2542 | case I40IW_CM_STATE_FIN_WAIT1: |
| 2543 | cm_node->tcp_cntxt.rcv_nxt++; |
| 2544 | i40iw_cleanup_retrans_entry(cm_node); |
| 2545 | cm_node->state = I40IW_CM_STATE_CLOSING; |
| 2546 | i40iw_send_ack(cm_node); |
| 2547 | /* |
| 2548 | * Wait for ACK as this is simultaneous close. |
| 2549 | * After we receive ACK, do not send anything. |
| 2550 | * Just rm the node. |
| 2551 | */ |
| 2552 | break; |
| 2553 | case I40IW_CM_STATE_FIN_WAIT2: |
| 2554 | cm_node->tcp_cntxt.rcv_nxt++; |
| 2555 | i40iw_cleanup_retrans_entry(cm_node); |
| 2556 | cm_node->state = I40IW_CM_STATE_TIME_WAIT; |
| 2557 | i40iw_send_ack(cm_node); |
| 2558 | ret = |
| 2559 | i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0); |
| 2560 | if (ret) |
| 2561 | i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state); |
| 2562 | break; |
| 2563 | case I40IW_CM_STATE_TIME_WAIT: |
| 2564 | cm_node->tcp_cntxt.rcv_nxt++; |
| 2565 | i40iw_cleanup_retrans_entry(cm_node); |
| 2566 | cm_node->state = I40IW_CM_STATE_CLOSED; |
| 2567 | i40iw_rem_ref_cm_node(cm_node); |
| 2568 | break; |
| 2569 | case I40IW_CM_STATE_OFFLOADED: |
| 2570 | default: |
| 2571 | i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state); |
| 2572 | break; |
| 2573 | } |
| 2574 | } |
| 2575 | |
| 2576 | /** |
| 2577 | * i40iw_handle_rst_pkt - process received RST packet |
| 2578 | * @cm_node: connection's node |
| 2579 | * @rbuf: receive buffer |
| 2580 | */ |
| 2581 | static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node, |
| 2582 | struct i40iw_puda_buf *rbuf) |
| 2583 | { |
| 2584 | i40iw_cleanup_retrans_entry(cm_node); |
| 2585 | switch (cm_node->state) { |
| 2586 | case I40IW_CM_STATE_SYN_SENT: |
| 2587 | case I40IW_CM_STATE_MPAREQ_SENT: |
| 2588 | switch (cm_node->mpa_frame_rev) { |
| 2589 | case IETF_MPA_V2: |
| 2590 | cm_node->mpa_frame_rev = IETF_MPA_V1; |
| 2591 | /* send a syn and goto syn sent state */ |
| 2592 | cm_node->state = I40IW_CM_STATE_SYN_SENT; |
| 2593 | if (i40iw_send_syn(cm_node, 0)) |
| 2594 | i40iw_active_open_err(cm_node, false); |
| 2595 | break; |
| 2596 | case IETF_MPA_V1: |
| 2597 | default: |
| 2598 | i40iw_active_open_err(cm_node, false); |
| 2599 | break; |
| 2600 | } |
| 2601 | break; |
| 2602 | case I40IW_CM_STATE_MPAREQ_RCVD: |
| 2603 | atomic_add_return(1, &cm_node->passive_state); |
| 2604 | break; |
| 2605 | case I40IW_CM_STATE_ESTABLISHED: |
| 2606 | case I40IW_CM_STATE_SYN_RCVD: |
| 2607 | case I40IW_CM_STATE_LISTENING: |
| 2608 | i40iw_pr_err("Bad state state = %d\n", cm_node->state); |
| 2609 | i40iw_passive_open_err(cm_node, false); |
| 2610 | break; |
| 2611 | case I40IW_CM_STATE_OFFLOADED: |
| 2612 | i40iw_active_open_err(cm_node, false); |
| 2613 | break; |
| 2614 | case I40IW_CM_STATE_CLOSED: |
| 2615 | break; |
| 2616 | case I40IW_CM_STATE_FIN_WAIT2: |
| 2617 | case I40IW_CM_STATE_FIN_WAIT1: |
| 2618 | case I40IW_CM_STATE_LAST_ACK: |
| 2619 | cm_node->cm_id->rem_ref(cm_node->cm_id); |
| 2620 | case I40IW_CM_STATE_TIME_WAIT: |
| 2621 | cm_node->state = I40IW_CM_STATE_CLOSED; |
| 2622 | i40iw_rem_ref_cm_node(cm_node); |
| 2623 | break; |
| 2624 | default: |
| 2625 | break; |
| 2626 | } |
| 2627 | } |
| 2628 | |
| 2629 | /** |
| 2630 | * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer |
| 2631 | * @cm_node: connection's node |
| 2632 | * @rbuf: receive buffer |
| 2633 | */ |
| 2634 | static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node, |
| 2635 | struct i40iw_puda_buf *rbuf) |
| 2636 | { |
| 2637 | int ret; |
| 2638 | int datasize = rbuf->datalen; |
| 2639 | u8 *dataloc = rbuf->data; |
| 2640 | |
| 2641 | enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN; |
| 2642 | u32 res_type; |
| 2643 | |
| 2644 | ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize); |
| 2645 | if (ret) { |
| 2646 | if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT) |
| 2647 | i40iw_active_open_err(cm_node, true); |
| 2648 | else |
| 2649 | i40iw_passive_open_err(cm_node, true); |
| 2650 | return; |
| 2651 | } |
| 2652 | |
| 2653 | switch (cm_node->state) { |
| 2654 | case I40IW_CM_STATE_ESTABLISHED: |
| 2655 | if (res_type == I40IW_MPA_REQUEST_REJECT) |
| 2656 | i40iw_pr_err("state for reject\n"); |
| 2657 | cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD; |
| 2658 | type = I40IW_CM_EVENT_MPA_REQ; |
| 2659 | i40iw_send_ack(cm_node); /* ACK received MPA request */ |
| 2660 | atomic_set(&cm_node->passive_state, |
| 2661 | I40IW_PASSIVE_STATE_INDICATED); |
| 2662 | break; |
| 2663 | case I40IW_CM_STATE_MPAREQ_SENT: |
| 2664 | i40iw_cleanup_retrans_entry(cm_node); |
| 2665 | if (res_type == I40IW_MPA_REQUEST_REJECT) { |
| 2666 | type = I40IW_CM_EVENT_MPA_REJECT; |
| 2667 | cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD; |
| 2668 | } else { |
| 2669 | type = I40IW_CM_EVENT_CONNECTED; |
| 2670 | cm_node->state = I40IW_CM_STATE_OFFLOADED; |
| 2671 | i40iw_send_ack(cm_node); |
| 2672 | } |
| 2673 | break; |
| 2674 | default: |
| 2675 | pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state); |
| 2676 | break; |
| 2677 | } |
| 2678 | i40iw_create_event(cm_node, type); |
| 2679 | } |
| 2680 | |
| 2681 | /** |
| 2682 | * i40iw_indicate_pkt_err - Send up err event to cm |
| 2683 | * @cm_node: connection's node |
| 2684 | */ |
| 2685 | static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node) |
| 2686 | { |
| 2687 | switch (cm_node->state) { |
| 2688 | case I40IW_CM_STATE_SYN_SENT: |
| 2689 | case I40IW_CM_STATE_MPAREQ_SENT: |
| 2690 | i40iw_active_open_err(cm_node, true); |
| 2691 | break; |
| 2692 | case I40IW_CM_STATE_ESTABLISHED: |
| 2693 | case I40IW_CM_STATE_SYN_RCVD: |
| 2694 | i40iw_passive_open_err(cm_node, true); |
| 2695 | break; |
| 2696 | case I40IW_CM_STATE_OFFLOADED: |
| 2697 | default: |
| 2698 | break; |
| 2699 | } |
| 2700 | } |
| 2701 | |
| 2702 | /** |
| 2703 | * i40iw_check_syn - Check for error on received syn ack |
| 2704 | * @cm_node: connection's node |
| 2705 | * @tcph: pointer tcp header |
| 2706 | */ |
| 2707 | static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) |
| 2708 | { |
| 2709 | int err = 0; |
| 2710 | |
| 2711 | if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { |
| 2712 | err = 1; |
| 2713 | i40iw_active_open_err(cm_node, true); |
| 2714 | } |
| 2715 | return err; |
| 2716 | } |
| 2717 | |
| 2718 | /** |
| 2719 | * i40iw_check_seq - check seq numbers if OK |
| 2720 | * @cm_node: connection's node |
| 2721 | * @tcph: pointer tcp header |
| 2722 | */ |
| 2723 | static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) |
| 2724 | { |
| 2725 | int err = 0; |
| 2726 | u32 seq; |
| 2727 | u32 ack_seq; |
| 2728 | u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; |
| 2729 | u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; |
| 2730 | u32 rcv_wnd; |
| 2731 | |
| 2732 | seq = ntohl(tcph->seq); |
| 2733 | ack_seq = ntohl(tcph->ack_seq); |
| 2734 | rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; |
| 2735 | if (ack_seq != loc_seq_num) |
| 2736 | err = -1; |
| 2737 | else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) |
| 2738 | err = -1; |
| 2739 | if (err) { |
| 2740 | i40iw_pr_err("seq number\n"); |
| 2741 | i40iw_indicate_pkt_err(cm_node); |
| 2742 | } |
| 2743 | return err; |
| 2744 | } |
| 2745 | |
| 2746 | /** |
| 2747 | * i40iw_handle_syn_pkt - is for Passive node |
| 2748 | * @cm_node: connection's node |
| 2749 | * @rbuf: receive buffer |
| 2750 | */ |
| 2751 | static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node, |
| 2752 | struct i40iw_puda_buf *rbuf) |
| 2753 | { |
| 2754 | struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; |
| 2755 | int ret; |
| 2756 | u32 inc_sequence; |
| 2757 | int optionsize; |
| 2758 | struct i40iw_cm_info nfo; |
| 2759 | |
| 2760 | optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); |
| 2761 | inc_sequence = ntohl(tcph->seq); |
| 2762 | |
| 2763 | switch (cm_node->state) { |
| 2764 | case I40IW_CM_STATE_SYN_SENT: |
| 2765 | case I40IW_CM_STATE_MPAREQ_SENT: |
| 2766 | /* Rcvd syn on active open connection */ |
| 2767 | i40iw_active_open_err(cm_node, 1); |
| 2768 | break; |
| 2769 | case I40IW_CM_STATE_LISTENING: |
| 2770 | /* Passive OPEN */ |
| 2771 | if (atomic_read(&cm_node->listener->pend_accepts_cnt) > |
| 2772 | cm_node->listener->backlog) { |
| 2773 | cm_node->cm_core->stats_backlog_drops++; |
| 2774 | i40iw_passive_open_err(cm_node, false); |
| 2775 | break; |
| 2776 | } |
| 2777 | ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); |
| 2778 | if (ret) { |
| 2779 | i40iw_passive_open_err(cm_node, false); |
| 2780 | /* drop pkt */ |
| 2781 | break; |
| 2782 | } |
| 2783 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; |
| 2784 | cm_node->accept_pend = 1; |
| 2785 | atomic_inc(&cm_node->listener->pend_accepts_cnt); |
| 2786 | |
| 2787 | cm_node->state = I40IW_CM_STATE_SYN_RCVD; |
| 2788 | i40iw_get_addr_info(cm_node, &nfo); |
| 2789 | ret = i40iw_manage_qhash(cm_node->iwdev, |
| 2790 | &nfo, |
| 2791 | I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
| 2792 | I40IW_QHASH_MANAGE_TYPE_ADD, |
| 2793 | (void *)cm_node, |
| 2794 | false); |
| 2795 | cm_node->qhash_set = true; |
| 2796 | break; |
| 2797 | case I40IW_CM_STATE_CLOSED: |
| 2798 | i40iw_cleanup_retrans_entry(cm_node); |
| 2799 | atomic_inc(&cm_node->ref_count); |
| 2800 | i40iw_send_reset(cm_node); |
| 2801 | break; |
| 2802 | case I40IW_CM_STATE_OFFLOADED: |
| 2803 | case I40IW_CM_STATE_ESTABLISHED: |
| 2804 | case I40IW_CM_STATE_FIN_WAIT1: |
| 2805 | case I40IW_CM_STATE_FIN_WAIT2: |
| 2806 | case I40IW_CM_STATE_MPAREQ_RCVD: |
| 2807 | case I40IW_CM_STATE_LAST_ACK: |
| 2808 | case I40IW_CM_STATE_CLOSING: |
| 2809 | case I40IW_CM_STATE_UNKNOWN: |
| 2810 | default: |
| 2811 | break; |
| 2812 | } |
| 2813 | } |
| 2814 | |
| 2815 | /** |
| 2816 | * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side) |
| 2817 | * @cm_node: connection's node |
| 2818 | * @rbuf: receive buffer |
| 2819 | */ |
| 2820 | static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node, |
| 2821 | struct i40iw_puda_buf *rbuf) |
| 2822 | { |
| 2823 | struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; |
| 2824 | int ret; |
| 2825 | u32 inc_sequence; |
| 2826 | int optionsize; |
| 2827 | |
| 2828 | optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); |
| 2829 | inc_sequence = ntohl(tcph->seq); |
| 2830 | switch (cm_node->state) { |
| 2831 | case I40IW_CM_STATE_SYN_SENT: |
| 2832 | i40iw_cleanup_retrans_entry(cm_node); |
| 2833 | /* active open */ |
| 2834 | if (i40iw_check_syn(cm_node, tcph)) { |
| 2835 | i40iw_pr_err("check syn fail\n"); |
| 2836 | return; |
| 2837 | } |
| 2838 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
| 2839 | /* setup options */ |
| 2840 | ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0); |
| 2841 | if (ret) { |
| 2842 | i40iw_debug(cm_node->dev, |
| 2843 | I40IW_DEBUG_CM, |
| 2844 | "cm_node=%p tcp_options failed\n", |
| 2845 | cm_node); |
| 2846 | break; |
| 2847 | } |
| 2848 | i40iw_cleanup_retrans_entry(cm_node); |
| 2849 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; |
| 2850 | i40iw_send_ack(cm_node); /* ACK for the syn_ack */ |
| 2851 | ret = i40iw_send_mpa_request(cm_node); |
| 2852 | if (ret) { |
| 2853 | i40iw_debug(cm_node->dev, |
| 2854 | I40IW_DEBUG_CM, |
| 2855 | "cm_node=%p i40iw_send_mpa_request failed\n", |
| 2856 | cm_node); |
| 2857 | break; |
| 2858 | } |
| 2859 | cm_node->state = I40IW_CM_STATE_MPAREQ_SENT; |
| 2860 | break; |
| 2861 | case I40IW_CM_STATE_MPAREQ_RCVD: |
| 2862 | i40iw_passive_open_err(cm_node, true); |
| 2863 | break; |
| 2864 | case I40IW_CM_STATE_LISTENING: |
| 2865 | cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); |
| 2866 | i40iw_cleanup_retrans_entry(cm_node); |
| 2867 | cm_node->state = I40IW_CM_STATE_CLOSED; |
| 2868 | i40iw_send_reset(cm_node); |
| 2869 | break; |
| 2870 | case I40IW_CM_STATE_CLOSED: |
| 2871 | cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); |
| 2872 | i40iw_cleanup_retrans_entry(cm_node); |
| 2873 | atomic_inc(&cm_node->ref_count); |
| 2874 | i40iw_send_reset(cm_node); |
| 2875 | break; |
| 2876 | case I40IW_CM_STATE_ESTABLISHED: |
| 2877 | case I40IW_CM_STATE_FIN_WAIT1: |
| 2878 | case I40IW_CM_STATE_FIN_WAIT2: |
| 2879 | case I40IW_CM_STATE_LAST_ACK: |
| 2880 | case I40IW_CM_STATE_OFFLOADED: |
| 2881 | case I40IW_CM_STATE_CLOSING: |
| 2882 | case I40IW_CM_STATE_UNKNOWN: |
| 2883 | case I40IW_CM_STATE_MPAREQ_SENT: |
| 2884 | default: |
| 2885 | break; |
| 2886 | } |
| 2887 | } |
| 2888 | |
| 2889 | /** |
| 2890 | * i40iw_handle_ack_pkt - process packet with ACK |
| 2891 | * @cm_node: connection's node |
| 2892 | * @rbuf: receive buffer |
| 2893 | */ |
| 2894 | static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node, |
| 2895 | struct i40iw_puda_buf *rbuf) |
| 2896 | { |
| 2897 | struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; |
| 2898 | u32 inc_sequence; |
| 2899 | int ret = 0; |
| 2900 | int optionsize; |
| 2901 | u32 datasize = rbuf->datalen; |
| 2902 | |
| 2903 | optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); |
| 2904 | |
| 2905 | if (i40iw_check_seq(cm_node, tcph)) |
| 2906 | return -EINVAL; |
| 2907 | |
| 2908 | inc_sequence = ntohl(tcph->seq); |
| 2909 | switch (cm_node->state) { |
| 2910 | case I40IW_CM_STATE_SYN_RCVD: |
| 2911 | i40iw_cleanup_retrans_entry(cm_node); |
| 2912 | ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); |
| 2913 | if (ret) |
| 2914 | break; |
| 2915 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
| 2916 | cm_node->state = I40IW_CM_STATE_ESTABLISHED; |
| 2917 | if (datasize) { |
| 2918 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; |
| 2919 | i40iw_get_remote_addr(cm_node); |
| 2920 | i40iw_handle_rcv_mpa(cm_node, rbuf); |
| 2921 | } |
| 2922 | break; |
| 2923 | case I40IW_CM_STATE_ESTABLISHED: |
| 2924 | i40iw_cleanup_retrans_entry(cm_node); |
| 2925 | if (datasize) { |
| 2926 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; |
| 2927 | i40iw_handle_rcv_mpa(cm_node, rbuf); |
| 2928 | } |
| 2929 | break; |
| 2930 | case I40IW_CM_STATE_MPAREQ_SENT: |
| 2931 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
| 2932 | if (datasize) { |
| 2933 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; |
| 2934 | i40iw_handle_rcv_mpa(cm_node, rbuf); |
| 2935 | } |
| 2936 | break; |
| 2937 | case I40IW_CM_STATE_LISTENING: |
| 2938 | i40iw_cleanup_retrans_entry(cm_node); |
| 2939 | cm_node->state = I40IW_CM_STATE_CLOSED; |
| 2940 | i40iw_send_reset(cm_node); |
| 2941 | break; |
| 2942 | case I40IW_CM_STATE_CLOSED: |
| 2943 | i40iw_cleanup_retrans_entry(cm_node); |
| 2944 | atomic_inc(&cm_node->ref_count); |
| 2945 | i40iw_send_reset(cm_node); |
| 2946 | break; |
| 2947 | case I40IW_CM_STATE_LAST_ACK: |
| 2948 | case I40IW_CM_STATE_CLOSING: |
| 2949 | i40iw_cleanup_retrans_entry(cm_node); |
| 2950 | cm_node->state = I40IW_CM_STATE_CLOSED; |
| 2951 | if (!cm_node->accept_pend) |
| 2952 | cm_node->cm_id->rem_ref(cm_node->cm_id); |
| 2953 | i40iw_rem_ref_cm_node(cm_node); |
| 2954 | break; |
| 2955 | case I40IW_CM_STATE_FIN_WAIT1: |
| 2956 | i40iw_cleanup_retrans_entry(cm_node); |
| 2957 | cm_node->state = I40IW_CM_STATE_FIN_WAIT2; |
| 2958 | break; |
| 2959 | case I40IW_CM_STATE_SYN_SENT: |
| 2960 | case I40IW_CM_STATE_FIN_WAIT2: |
| 2961 | case I40IW_CM_STATE_OFFLOADED: |
| 2962 | case I40IW_CM_STATE_MPAREQ_RCVD: |
| 2963 | case I40IW_CM_STATE_UNKNOWN: |
| 2964 | default: |
| 2965 | i40iw_cleanup_retrans_entry(cm_node); |
| 2966 | break; |
| 2967 | } |
| 2968 | return ret; |
| 2969 | } |
| 2970 | |
| 2971 | /** |
| 2972 | * i40iw_process_packet - process cm packet |
| 2973 | * @cm_node: connection's node |
| 2974 | * @rbuf: receive buffer |
| 2975 | */ |
| 2976 | static void i40iw_process_packet(struct i40iw_cm_node *cm_node, |
| 2977 | struct i40iw_puda_buf *rbuf) |
| 2978 | { |
| 2979 | enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN; |
| 2980 | struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; |
| 2981 | u32 fin_set = 0; |
| 2982 | int ret; |
| 2983 | |
| 2984 | if (tcph->rst) { |
| 2985 | pkt_type = I40IW_PKT_TYPE_RST; |
| 2986 | } else if (tcph->syn) { |
| 2987 | pkt_type = I40IW_PKT_TYPE_SYN; |
| 2988 | if (tcph->ack) |
| 2989 | pkt_type = I40IW_PKT_TYPE_SYNACK; |
| 2990 | } else if (tcph->ack) { |
| 2991 | pkt_type = I40IW_PKT_TYPE_ACK; |
| 2992 | } |
| 2993 | if (tcph->fin) |
| 2994 | fin_set = 1; |
| 2995 | |
| 2996 | switch (pkt_type) { |
| 2997 | case I40IW_PKT_TYPE_SYN: |
| 2998 | i40iw_handle_syn_pkt(cm_node, rbuf); |
| 2999 | break; |
| 3000 | case I40IW_PKT_TYPE_SYNACK: |
| 3001 | i40iw_handle_synack_pkt(cm_node, rbuf); |
| 3002 | break; |
| 3003 | case I40IW_PKT_TYPE_ACK: |
| 3004 | ret = i40iw_handle_ack_pkt(cm_node, rbuf); |
| 3005 | if (fin_set && !ret) |
| 3006 | i40iw_handle_fin_pkt(cm_node); |
| 3007 | break; |
| 3008 | case I40IW_PKT_TYPE_RST: |
| 3009 | i40iw_handle_rst_pkt(cm_node, rbuf); |
| 3010 | break; |
| 3011 | default: |
| 3012 | if (fin_set && |
| 3013 | (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) |
| 3014 | i40iw_handle_fin_pkt(cm_node); |
| 3015 | break; |
| 3016 | } |
| 3017 | } |
| 3018 | |
| 3019 | /** |
| 3020 | * i40iw_make_listen_node - create a listen node with params |
| 3021 | * @cm_core: cm's core |
| 3022 | * @iwdev: iwarp device structure |
| 3023 | * @cm_info: quad info for connection |
| 3024 | */ |
| 3025 | static struct i40iw_cm_listener *i40iw_make_listen_node( |
| 3026 | struct i40iw_cm_core *cm_core, |
| 3027 | struct i40iw_device *iwdev, |
| 3028 | struct i40iw_cm_info *cm_info) |
| 3029 | { |
| 3030 | struct i40iw_cm_listener *listener; |
| 3031 | struct iwpm_dev_data pm_reg_msg; |
| 3032 | struct iwpm_sa_data pm_msg; |
| 3033 | int iwpm_err; |
| 3034 | unsigned long flags; |
| 3035 | |
| 3036 | /* cannot have multiple matching listeners */ |
| 3037 | listener = i40iw_find_listener(cm_core, cm_info->loc_addr, |
| 3038 | cm_info->loc_port, |
| 3039 | cm_info->vlan_id, |
| 3040 | I40IW_CM_LISTENER_EITHER_STATE, |
| 3041 | false); |
| 3042 | if (listener && |
| 3043 | (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) { |
| 3044 | atomic_dec(&listener->ref_count); |
| 3045 | i40iw_debug(cm_core->dev, |
| 3046 | I40IW_DEBUG_CM, |
| 3047 | "Not creating listener since it already exists\n"); |
| 3048 | return NULL; |
| 3049 | } |
| 3050 | |
| 3051 | if (!listener) { |
| 3052 | i40iw_form_reg_msg(iwdev, &pm_reg_msg); |
| 3053 | iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_I40IW); |
| 3054 | if (iwpm_err) |
| 3055 | i40iw_pr_err("PM register fail err = %d\n", |
| 3056 | iwpm_err); |
| 3057 | |
| 3058 | if (iwpm_valid_pid() && !iwpm_err) { |
| 3059 | i40iw_form_pm_msg(cm_info, &pm_msg); |
| 3060 | iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_I40IW); |
| 3061 | if (iwpm_err) |
| 3062 | i40iw_pr_err("PM query fail err = %d\n", |
| 3063 | iwpm_err); |
| 3064 | else |
| 3065 | i40iw_record_pm_msg(cm_info, &pm_msg, false); |
| 3066 | } |
| 3067 | |
| 3068 | /* create a CM listen node (1/2 node to compare incoming traffic to) */ |
| 3069 | listener = kzalloc(sizeof(*listener), GFP_ATOMIC); |
| 3070 | if (!listener) |
| 3071 | return NULL; |
| 3072 | cm_core->stats_listen_nodes_created++; |
| 3073 | memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr)); |
| 3074 | memcpy(listener->map_loc_addr, cm_info->map_loc_addr, |
| 3075 | sizeof(listener->map_loc_addr)); |
| 3076 | listener->loc_port = cm_info->loc_port; |
| 3077 | listener->map_loc_port = cm_info->map_loc_port; |
| 3078 | |
| 3079 | INIT_LIST_HEAD(&listener->child_listen_list); |
| 3080 | |
| 3081 | atomic_set(&listener->ref_count, 1); |
| 3082 | } else { |
| 3083 | listener->reused_node = 1; |
| 3084 | } |
| 3085 | |
| 3086 | listener->cm_id = cm_info->cm_id; |
| 3087 | listener->ipv4 = cm_info->ipv4; |
| 3088 | listener->vlan_id = cm_info->vlan_id; |
| 3089 | atomic_set(&listener->pend_accepts_cnt, 0); |
| 3090 | listener->cm_core = cm_core; |
| 3091 | listener->iwdev = iwdev; |
| 3092 | |
| 3093 | listener->backlog = cm_info->backlog; |
| 3094 | listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE; |
| 3095 | |
| 3096 | if (!listener->reused_node) { |
| 3097 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
| 3098 | list_add(&listener->list, &cm_core->listen_nodes); |
| 3099 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| 3100 | } |
| 3101 | |
| 3102 | return listener; |
| 3103 | } |
| 3104 | |
| 3105 | /** |
| 3106 | * i40iw_create_cm_node - make a connection node with params |
| 3107 | * @cm_core: cm's core |
| 3108 | * @iwdev: iwarp device structure |
| 3109 | * @private_data_len: len to provate data for mpa request |
| 3110 | * @private_data: pointer to private data for connection |
| 3111 | * @cm_info: quad info for connection |
| 3112 | */ |
| 3113 | static struct i40iw_cm_node *i40iw_create_cm_node( |
| 3114 | struct i40iw_cm_core *cm_core, |
| 3115 | struct i40iw_device *iwdev, |
| 3116 | u16 private_data_len, |
| 3117 | void *private_data, |
| 3118 | struct i40iw_cm_info *cm_info) |
| 3119 | { |
| 3120 | int ret; |
| 3121 | struct i40iw_cm_node *cm_node; |
| 3122 | struct i40iw_cm_listener *loopback_remotelistener; |
| 3123 | struct i40iw_cm_node *loopback_remotenode; |
| 3124 | struct i40iw_cm_info loopback_cm_info; |
| 3125 | |
| 3126 | /* create a CM connection node */ |
| 3127 | cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL); |
| 3128 | if (!cm_node) |
| 3129 | return NULL; |
| 3130 | /* set our node side to client (active) side */ |
| 3131 | cm_node->tcp_cntxt.client = 1; |
| 3132 | cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; |
| 3133 | |
| 3134 | if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) { |
| 3135 | loopback_remotelistener = i40iw_find_listener( |
| 3136 | cm_core, |
| 3137 | cm_info->map_rem_addr, |
| 3138 | cm_node->map_rem_port, |
| 3139 | cm_node->vlan_id, |
| 3140 | I40IW_CM_LISTENER_ACTIVE_STATE, |
| 3141 | true); |
| 3142 | if (!loopback_remotelistener) { |
| 3143 | i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); |
| 3144 | } else { |
| 3145 | loopback_cm_info = *cm_info; |
| 3146 | loopback_cm_info.loc_port = cm_info->rem_port; |
| 3147 | loopback_cm_info.rem_port = cm_info->loc_port; |
| 3148 | loopback_cm_info.map_loc_port = cm_info->map_rem_port; |
| 3149 | loopback_cm_info.map_rem_port = cm_info->map_loc_port; |
| 3150 | loopback_cm_info.cm_id = loopback_remotelistener->cm_id; |
| 3151 | loopback_cm_info.ipv4 = cm_info->ipv4; |
| 3152 | loopback_remotenode = i40iw_make_cm_node(cm_core, |
| 3153 | iwdev, |
| 3154 | &loopback_cm_info, |
| 3155 | loopback_remotelistener); |
| 3156 | if (!loopback_remotenode) { |
| 3157 | i40iw_rem_ref_cm_node(cm_node); |
| 3158 | return NULL; |
| 3159 | } |
| 3160 | cm_core->stats_loopbacks++; |
| 3161 | loopback_remotenode->loopbackpartner = cm_node; |
| 3162 | loopback_remotenode->tcp_cntxt.rcv_wscale = |
| 3163 | I40IW_CM_DEFAULT_RCV_WND_SCALE; |
| 3164 | cm_node->loopbackpartner = loopback_remotenode; |
| 3165 | memcpy(loopback_remotenode->pdata_buf, private_data, |
| 3166 | private_data_len); |
| 3167 | loopback_remotenode->pdata.size = private_data_len; |
| 3168 | |
| 3169 | cm_node->state = I40IW_CM_STATE_OFFLOADED; |
| 3170 | cm_node->tcp_cntxt.rcv_nxt = |
| 3171 | loopback_remotenode->tcp_cntxt.loc_seq_num; |
| 3172 | loopback_remotenode->tcp_cntxt.rcv_nxt = |
| 3173 | cm_node->tcp_cntxt.loc_seq_num; |
| 3174 | cm_node->tcp_cntxt.max_snd_wnd = |
| 3175 | loopback_remotenode->tcp_cntxt.rcv_wnd; |
| 3176 | loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd; |
| 3177 | cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd; |
| 3178 | loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd; |
| 3179 | cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale; |
| 3180 | loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale; |
| 3181 | loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD; |
| 3182 | i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ); |
| 3183 | } |
| 3184 | return cm_node; |
| 3185 | } |
| 3186 | |
| 3187 | cm_node->pdata.size = private_data_len; |
| 3188 | cm_node->pdata.addr = cm_node->pdata_buf; |
| 3189 | |
| 3190 | memcpy(cm_node->pdata_buf, private_data, private_data_len); |
| 3191 | |
| 3192 | cm_node->state = I40IW_CM_STATE_SYN_SENT; |
| 3193 | ret = i40iw_send_syn(cm_node, 0); |
| 3194 | |
| 3195 | if (ret) { |
| 3196 | if (cm_node->ipv4) |
| 3197 | i40iw_debug(cm_node->dev, |
| 3198 | I40IW_DEBUG_CM, |
| 3199 | "Api - connect() FAILED: dest addr=%pI4", |
| 3200 | cm_node->rem_addr); |
| 3201 | else |
| 3202 | i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, |
| 3203 | "Api - connect() FAILED: dest addr=%pI6", |
| 3204 | cm_node->rem_addr); |
| 3205 | i40iw_rem_ref_cm_node(cm_node); |
| 3206 | cm_node = NULL; |
| 3207 | } |
| 3208 | |
| 3209 | if (cm_node) |
| 3210 | i40iw_debug(cm_node->dev, |
| 3211 | I40IW_DEBUG_CM, |
| 3212 | "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n", |
| 3213 | cm_node->rem_port, |
| 3214 | cm_node, |
| 3215 | cm_node->cm_id); |
| 3216 | |
| 3217 | return cm_node; |
| 3218 | } |
| 3219 | |
| 3220 | /** |
| 3221 | * i40iw_cm_reject - reject and teardown a connection |
| 3222 | * @cm_node: connection's node |
| 3223 | * @pdate: ptr to private data for reject |
| 3224 | * @plen: size of private data |
| 3225 | */ |
| 3226 | static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen) |
| 3227 | { |
| 3228 | int ret = 0; |
| 3229 | int err; |
| 3230 | int passive_state; |
| 3231 | struct iw_cm_id *cm_id = cm_node->cm_id; |
| 3232 | struct i40iw_cm_node *loopback = cm_node->loopbackpartner; |
| 3233 | |
| 3234 | if (cm_node->tcp_cntxt.client) |
| 3235 | return ret; |
| 3236 | i40iw_cleanup_retrans_entry(cm_node); |
| 3237 | |
| 3238 | if (!loopback) { |
| 3239 | passive_state = atomic_add_return(1, &cm_node->passive_state); |
| 3240 | if (passive_state == I40IW_SEND_RESET_EVENT) { |
| 3241 | cm_node->state = I40IW_CM_STATE_CLOSED; |
| 3242 | i40iw_rem_ref_cm_node(cm_node); |
| 3243 | } else { |
| 3244 | if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { |
| 3245 | i40iw_rem_ref_cm_node(cm_node); |
| 3246 | } else { |
| 3247 | ret = i40iw_send_mpa_reject(cm_node, pdata, plen); |
| 3248 | if (ret) { |
| 3249 | cm_node->state = I40IW_CM_STATE_CLOSED; |
| 3250 | err = i40iw_send_reset(cm_node); |
| 3251 | if (err) |
| 3252 | i40iw_pr_err("send reset failed\n"); |
| 3253 | } else { |
| 3254 | cm_id->add_ref(cm_id); |
| 3255 | } |
| 3256 | } |
| 3257 | } |
| 3258 | } else { |
| 3259 | cm_node->cm_id = NULL; |
| 3260 | if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { |
| 3261 | i40iw_rem_ref_cm_node(cm_node); |
| 3262 | i40iw_rem_ref_cm_node(loopback); |
| 3263 | } else { |
| 3264 | ret = i40iw_send_cm_event(loopback, |
| 3265 | loopback->cm_id, |
| 3266 | IW_CM_EVENT_CONNECT_REPLY, |
| 3267 | -ECONNREFUSED); |
| 3268 | i40iw_rem_ref_cm_node(cm_node); |
| 3269 | loopback->state = I40IW_CM_STATE_CLOSING; |
| 3270 | |
| 3271 | cm_id = loopback->cm_id; |
| 3272 | i40iw_rem_ref_cm_node(loopback); |
| 3273 | cm_id->rem_ref(cm_id); |
| 3274 | } |
| 3275 | } |
| 3276 | |
| 3277 | return ret; |
| 3278 | } |
| 3279 | |
| 3280 | /** |
| 3281 | * i40iw_cm_close - close of cm connection |
| 3282 | * @cm_node: connection's node |
| 3283 | */ |
| 3284 | static int i40iw_cm_close(struct i40iw_cm_node *cm_node) |
| 3285 | { |
| 3286 | int ret = 0; |
| 3287 | |
| 3288 | if (!cm_node) |
| 3289 | return -EINVAL; |
| 3290 | |
| 3291 | switch (cm_node->state) { |
| 3292 | case I40IW_CM_STATE_SYN_RCVD: |
| 3293 | case I40IW_CM_STATE_SYN_SENT: |
| 3294 | case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED: |
| 3295 | case I40IW_CM_STATE_ESTABLISHED: |
| 3296 | case I40IW_CM_STATE_ACCEPTING: |
| 3297 | case I40IW_CM_STATE_MPAREQ_SENT: |
| 3298 | case I40IW_CM_STATE_MPAREQ_RCVD: |
| 3299 | i40iw_cleanup_retrans_entry(cm_node); |
| 3300 | i40iw_send_reset(cm_node); |
| 3301 | break; |
| 3302 | case I40IW_CM_STATE_CLOSE_WAIT: |
| 3303 | cm_node->state = I40IW_CM_STATE_LAST_ACK; |
| 3304 | i40iw_send_fin(cm_node); |
| 3305 | break; |
| 3306 | case I40IW_CM_STATE_FIN_WAIT1: |
| 3307 | case I40IW_CM_STATE_FIN_WAIT2: |
| 3308 | case I40IW_CM_STATE_LAST_ACK: |
| 3309 | case I40IW_CM_STATE_TIME_WAIT: |
| 3310 | case I40IW_CM_STATE_CLOSING: |
| 3311 | ret = -1; |
| 3312 | break; |
| 3313 | case I40IW_CM_STATE_LISTENING: |
| 3314 | i40iw_cleanup_retrans_entry(cm_node); |
| 3315 | i40iw_send_reset(cm_node); |
| 3316 | break; |
| 3317 | case I40IW_CM_STATE_MPAREJ_RCVD: |
| 3318 | case I40IW_CM_STATE_UNKNOWN: |
| 3319 | case I40IW_CM_STATE_INITED: |
| 3320 | case I40IW_CM_STATE_CLOSED: |
| 3321 | case I40IW_CM_STATE_LISTENER_DESTROYED: |
| 3322 | i40iw_rem_ref_cm_node(cm_node); |
| 3323 | break; |
| 3324 | case I40IW_CM_STATE_OFFLOADED: |
| 3325 | if (cm_node->send_entry) |
| 3326 | i40iw_pr_err("send_entry\n"); |
| 3327 | i40iw_rem_ref_cm_node(cm_node); |
| 3328 | break; |
| 3329 | } |
| 3330 | return ret; |
| 3331 | } |
| 3332 | |
| 3333 | /** |
| 3334 | * i40iw_receive_ilq - recv an ETHERNET packet, and process it |
| 3335 | * through CM |
| 3336 | * @dev: FPK dev struct |
| 3337 | * @rbuf: receive buffer |
| 3338 | */ |
| 3339 | void i40iw_receive_ilq(struct i40iw_sc_dev *dev, struct i40iw_puda_buf *rbuf) |
| 3340 | { |
| 3341 | struct i40iw_cm_node *cm_node; |
| 3342 | struct i40iw_cm_listener *listener; |
| 3343 | struct iphdr *iph; |
| 3344 | struct ipv6hdr *ip6h; |
| 3345 | struct tcphdr *tcph; |
| 3346 | struct i40iw_cm_info cm_info; |
| 3347 | struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev; |
| 3348 | struct i40iw_cm_core *cm_core = &iwdev->cm_core; |
| 3349 | struct vlan_ethhdr *ethh; |
| 3350 | |
| 3351 | /* if vlan, then maclen = 18 else 14 */ |
| 3352 | iph = (struct iphdr *)rbuf->iph; |
| 3353 | memset(&cm_info, 0, sizeof(cm_info)); |
| 3354 | |
| 3355 | i40iw_debug_buf(dev, |
| 3356 | I40IW_DEBUG_ILQ, |
| 3357 | "RECEIVE ILQ BUFFER", |
| 3358 | rbuf->mem.va, |
| 3359 | rbuf->totallen); |
| 3360 | ethh = (struct vlan_ethhdr *)rbuf->mem.va; |
| 3361 | |
| 3362 | if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) { |
| 3363 | cm_info.vlan_id = ntohs(ethh->h_vlan_TCI) & VLAN_VID_MASK; |
| 3364 | i40iw_debug(cm_core->dev, |
| 3365 | I40IW_DEBUG_CM, |
| 3366 | "%s vlan_id=%d\n", |
| 3367 | __func__, |
| 3368 | cm_info.vlan_id); |
| 3369 | } else { |
| 3370 | cm_info.vlan_id = I40IW_NO_VLAN; |
| 3371 | } |
| 3372 | tcph = (struct tcphdr *)rbuf->tcph; |
| 3373 | |
| 3374 | if (rbuf->ipv4) { |
| 3375 | cm_info.loc_addr[0] = ntohl(iph->daddr); |
| 3376 | cm_info.rem_addr[0] = ntohl(iph->saddr); |
| 3377 | cm_info.ipv4 = true; |
| 3378 | } else { |
| 3379 | ip6h = (struct ipv6hdr *)rbuf->iph; |
| 3380 | i40iw_copy_ip_ntohl(cm_info.loc_addr, |
| 3381 | ip6h->daddr.in6_u.u6_addr32); |
| 3382 | i40iw_copy_ip_ntohl(cm_info.rem_addr, |
| 3383 | ip6h->saddr.in6_u.u6_addr32); |
| 3384 | cm_info.ipv4 = false; |
| 3385 | } |
| 3386 | cm_info.loc_port = ntohs(tcph->dest); |
| 3387 | cm_info.rem_port = ntohs(tcph->source); |
| 3388 | i40iw_init_mapinfo(&cm_info); |
| 3389 | |
| 3390 | cm_node = i40iw_find_node(cm_core, |
| 3391 | cm_info.map_rem_port, |
| 3392 | cm_info.map_rem_addr, |
| 3393 | cm_info.map_loc_port, |
| 3394 | cm_info.map_loc_addr, |
| 3395 | true); |
| 3396 | |
| 3397 | if (!cm_node) { |
| 3398 | /* Only type of packet accepted are for */ |
| 3399 | /* the PASSIVE open (syn only) */ |
| 3400 | if (!tcph->syn || tcph->ack) |
| 3401 | return; |
| 3402 | listener = |
| 3403 | i40iw_find_listener(cm_core, |
| 3404 | cm_info.map_loc_addr, |
| 3405 | cm_info.map_loc_port, |
| 3406 | cm_info.vlan_id, |
| 3407 | I40IW_CM_LISTENER_ACTIVE_STATE, |
| 3408 | true); |
| 3409 | if (!listener) { |
| 3410 | cm_info.cm_id = NULL; |
| 3411 | i40iw_debug(cm_core->dev, |
| 3412 | I40IW_DEBUG_CM, |
| 3413 | "%s no listener found\n", |
| 3414 | __func__); |
| 3415 | return; |
| 3416 | } |
| 3417 | cm_info.cm_id = listener->cm_id; |
| 3418 | cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener); |
| 3419 | if (!cm_node) { |
| 3420 | i40iw_debug(cm_core->dev, |
| 3421 | I40IW_DEBUG_CM, |
| 3422 | "%s allocate node failed\n", |
| 3423 | __func__); |
| 3424 | atomic_dec(&listener->ref_count); |
| 3425 | return; |
| 3426 | } |
| 3427 | if (!tcph->rst && !tcph->fin) { |
| 3428 | cm_node->state = I40IW_CM_STATE_LISTENING; |
| 3429 | } else { |
| 3430 | i40iw_rem_ref_cm_node(cm_node); |
| 3431 | return; |
| 3432 | } |
| 3433 | atomic_inc(&cm_node->ref_count); |
| 3434 | } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) { |
| 3435 | i40iw_rem_ref_cm_node(cm_node); |
| 3436 | return; |
| 3437 | } |
| 3438 | i40iw_process_packet(cm_node, rbuf); |
| 3439 | i40iw_rem_ref_cm_node(cm_node); |
| 3440 | } |
| 3441 | |
| 3442 | /** |
| 3443 | * i40iw_setup_cm_core - allocate a top level instance of a cm |
| 3444 | * core |
| 3445 | * @iwdev: iwarp device structure |
| 3446 | */ |
| 3447 | void i40iw_setup_cm_core(struct i40iw_device *iwdev) |
| 3448 | { |
| 3449 | struct i40iw_cm_core *cm_core = &iwdev->cm_core; |
| 3450 | |
| 3451 | cm_core->iwdev = iwdev; |
| 3452 | cm_core->dev = &iwdev->sc_dev; |
| 3453 | |
| 3454 | INIT_LIST_HEAD(&cm_core->connected_nodes); |
| 3455 | INIT_LIST_HEAD(&cm_core->listen_nodes); |
| 3456 | |
| 3457 | init_timer(&cm_core->tcp_timer); |
| 3458 | cm_core->tcp_timer.function = i40iw_cm_timer_tick; |
| 3459 | cm_core->tcp_timer.data = (unsigned long)cm_core; |
| 3460 | |
| 3461 | spin_lock_init(&cm_core->ht_lock); |
| 3462 | spin_lock_init(&cm_core->listen_list_lock); |
| 3463 | |
| 3464 | cm_core->event_wq = create_singlethread_workqueue("iwewq"); |
| 3465 | cm_core->disconn_wq = create_singlethread_workqueue("iwdwq"); |
| 3466 | } |
| 3467 | |
| 3468 | /** |
| 3469 | * i40iw_cleanup_cm_core - deallocate a top level instance of a |
| 3470 | * cm core |
| 3471 | * @cm_core: cm's core |
| 3472 | */ |
| 3473 | void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core) |
| 3474 | { |
| 3475 | unsigned long flags; |
| 3476 | |
| 3477 | if (!cm_core) |
| 3478 | return; |
| 3479 | |
| 3480 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
| 3481 | if (timer_pending(&cm_core->tcp_timer)) |
| 3482 | del_timer_sync(&cm_core->tcp_timer); |
| 3483 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| 3484 | |
| 3485 | destroy_workqueue(cm_core->event_wq); |
| 3486 | destroy_workqueue(cm_core->disconn_wq); |
| 3487 | } |
| 3488 | |
| 3489 | /** |
| 3490 | * i40iw_init_tcp_ctx - setup qp context |
| 3491 | * @cm_node: connection's node |
| 3492 | * @tcp_info: offload info for tcp |
| 3493 | * @iwqp: associate qp for the connection |
| 3494 | */ |
| 3495 | static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node, |
| 3496 | struct i40iw_tcp_offload_info *tcp_info, |
| 3497 | struct i40iw_qp *iwqp) |
| 3498 | { |
| 3499 | tcp_info->ipv4 = cm_node->ipv4; |
| 3500 | tcp_info->drop_ooo_seg = true; |
| 3501 | tcp_info->wscale = true; |
| 3502 | tcp_info->ignore_tcp_opt = true; |
| 3503 | tcp_info->ignore_tcp_uns_opt = true; |
| 3504 | tcp_info->no_nagle = false; |
| 3505 | |
| 3506 | tcp_info->ttl = I40IW_DEFAULT_TTL; |
| 3507 | tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR); |
| 3508 | tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH); |
| 3509 | tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH; |
| 3510 | |
| 3511 | tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED; |
| 3512 | tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; |
| 3513 | tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; |
| 3514 | |
| 3515 | tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
| 3516 | tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd); |
| 3517 | tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); |
| 3518 | tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
| 3519 | |
| 3520 | tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
| 3521 | tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss); |
| 3522 | tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); |
| 3523 | tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
| 3524 | tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd); |
| 3525 | tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd << |
| 3526 | cm_node->tcp_cntxt.rcv_wscale); |
| 3527 | |
| 3528 | tcp_info->flow_label = 0; |
| 3529 | tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss)); |
| 3530 | if (cm_node->vlan_id < VLAN_TAG_PRESENT) { |
| 3531 | tcp_info->insert_vlan_tag = true; |
| 3532 | tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id); |
| 3533 | } |
| 3534 | if (cm_node->ipv4) { |
| 3535 | tcp_info->src_port = cpu_to_le16(cm_node->map_loc_port); |
| 3536 | tcp_info->dst_port = cpu_to_le16(cm_node->map_rem_port); |
| 3537 | |
| 3538 | tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->map_rem_addr[0]); |
| 3539 | tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->map_loc_addr[0]); |
| 3540 | tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(iwqp->iwdev, |
| 3541 | &tcp_info->dest_ip_addr3, |
| 3542 | true, |
| 3543 | NULL, |
| 3544 | I40IW_ARP_RESOLVE)); |
| 3545 | } else { |
| 3546 | tcp_info->src_port = cpu_to_le16(cm_node->map_loc_port); |
| 3547 | tcp_info->dst_port = cpu_to_le16(cm_node->map_rem_port); |
| 3548 | tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->map_rem_addr[0]); |
| 3549 | tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->map_rem_addr[1]); |
| 3550 | tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->map_rem_addr[2]); |
| 3551 | tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->map_rem_addr[3]); |
| 3552 | tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->map_loc_addr[0]); |
| 3553 | tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->map_loc_addr[1]); |
| 3554 | tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->map_loc_addr[2]); |
| 3555 | tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->map_loc_addr[3]); |
| 3556 | tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table( |
| 3557 | iwqp->iwdev, |
| 3558 | &tcp_info->dest_ip_addr0, |
| 3559 | false, |
| 3560 | NULL, |
| 3561 | I40IW_ARP_RESOLVE)); |
| 3562 | } |
| 3563 | } |
| 3564 | |
| 3565 | /** |
| 3566 | * i40iw_cm_init_tsa_conn - setup qp for RTS |
| 3567 | * @iwqp: associate qp for the connection |
| 3568 | * @cm_node: connection's node |
| 3569 | */ |
| 3570 | static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp, |
| 3571 | struct i40iw_cm_node *cm_node) |
| 3572 | { |
| 3573 | struct i40iw_tcp_offload_info tcp_info; |
| 3574 | struct i40iwarp_offload_info *iwarp_info; |
| 3575 | struct i40iw_qp_host_ctx_info *ctx_info; |
| 3576 | struct i40iw_device *iwdev = iwqp->iwdev; |
| 3577 | struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev; |
| 3578 | |
| 3579 | memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info)); |
| 3580 | iwarp_info = &iwqp->iwarp_info; |
| 3581 | ctx_info = &iwqp->ctx_info; |
| 3582 | |
| 3583 | ctx_info->tcp_info = &tcp_info; |
| 3584 | ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; |
| 3585 | ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; |
| 3586 | |
| 3587 | iwarp_info->ord_size = cm_node->ord_size; |
| 3588 | iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size); |
| 3589 | |
| 3590 | if (iwarp_info->ord_size == 1) |
| 3591 | iwarp_info->ord_size = 2; |
| 3592 | |
| 3593 | iwarp_info->rd_enable = true; |
| 3594 | iwarp_info->rdmap_ver = 1; |
| 3595 | iwarp_info->ddp_ver = 1; |
| 3596 | |
| 3597 | iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; |
| 3598 | |
| 3599 | ctx_info->tcp_info_valid = true; |
| 3600 | ctx_info->iwarp_info_valid = true; |
| 3601 | |
| 3602 | i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp); |
| 3603 | if (cm_node->snd_mark_en) { |
| 3604 | iwarp_info->snd_mark_en = true; |
| 3605 | iwarp_info->snd_mark_offset = (tcp_info.snd_nxt & |
| 3606 | SNDMARKER_SEQNMASK) + cm_node->lsmm_size; |
| 3607 | } |
| 3608 | |
| 3609 | cm_node->state = I40IW_CM_STATE_OFFLOADED; |
| 3610 | tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED; |
| 3611 | tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx; |
| 3612 | |
| 3613 | dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info); |
| 3614 | |
| 3615 | /* once tcp_info is set, no need to do it again */ |
| 3616 | ctx_info->tcp_info_valid = false; |
| 3617 | ctx_info->iwarp_info_valid = false; |
| 3618 | } |
| 3619 | |
| 3620 | /** |
| 3621 | * i40iw_cm_disconn - when a connection is being closed |
| 3622 | * @iwqp: associate qp for the connection |
| 3623 | */ |
| 3624 | int i40iw_cm_disconn(struct i40iw_qp *iwqp) |
| 3625 | { |
| 3626 | struct disconn_work *work; |
| 3627 | struct i40iw_device *iwdev = iwqp->iwdev; |
| 3628 | struct i40iw_cm_core *cm_core = &iwdev->cm_core; |
| 3629 | |
| 3630 | work = kzalloc(sizeof(*work), GFP_ATOMIC); |
| 3631 | if (!work) |
| 3632 | return -ENOMEM; /* Timer will clean up */ |
| 3633 | |
| 3634 | i40iw_add_ref(&iwqp->ibqp); |
| 3635 | work->iwqp = iwqp; |
| 3636 | INIT_WORK(&work->work, i40iw_disconnect_worker); |
| 3637 | queue_work(cm_core->disconn_wq, &work->work); |
| 3638 | return 0; |
| 3639 | } |
| 3640 | |
| 3641 | /** |
| 3642 | * i40iw_loopback_nop - Send a nop |
| 3643 | * @qp: associated hw qp |
| 3644 | */ |
| 3645 | static void i40iw_loopback_nop(struct i40iw_sc_qp *qp) |
| 3646 | { |
| 3647 | u64 *wqe; |
| 3648 | u64 header; |
| 3649 | |
| 3650 | wqe = qp->qp_uk.sq_base->elem; |
| 3651 | set_64bit_val(wqe, 0, 0); |
| 3652 | set_64bit_val(wqe, 8, 0); |
| 3653 | set_64bit_val(wqe, 16, 0); |
| 3654 | |
| 3655 | header = LS_64(I40IWQP_OP_NOP, I40IWQPSQ_OPCODE) | |
| 3656 | LS_64(0, I40IWQPSQ_SIGCOMPL) | |
| 3657 | LS_64(qp->qp_uk.swqe_polarity, I40IWQPSQ_VALID); |
| 3658 | set_64bit_val(wqe, 24, header); |
| 3659 | } |
| 3660 | |
| 3661 | /** |
| 3662 | * i40iw_qp_disconnect - free qp and close cm |
| 3663 | * @iwqp: associate qp for the connection |
| 3664 | */ |
| 3665 | static void i40iw_qp_disconnect(struct i40iw_qp *iwqp) |
| 3666 | { |
| 3667 | struct i40iw_device *iwdev; |
| 3668 | struct i40iw_ib_device *iwibdev; |
| 3669 | |
| 3670 | iwdev = to_iwdev(iwqp->ibqp.device); |
| 3671 | if (!iwdev) { |
| 3672 | i40iw_pr_err("iwdev == NULL\n"); |
| 3673 | return; |
| 3674 | } |
| 3675 | |
| 3676 | iwibdev = iwdev->iwibdev; |
| 3677 | |
| 3678 | if (iwqp->active_conn) { |
| 3679 | /* indicate this connection is NOT active */ |
| 3680 | iwqp->active_conn = 0; |
| 3681 | } else { |
| 3682 | /* Need to free the Last Streaming Mode Message */ |
| 3683 | if (iwqp->ietf_mem.va) { |
| 3684 | if (iwqp->lsmm_mr) |
| 3685 | iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr); |
| 3686 | i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem); |
| 3687 | } |
| 3688 | } |
| 3689 | |
| 3690 | /* close the CM node down if it is still active */ |
| 3691 | if (iwqp->cm_node) { |
| 3692 | i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__); |
| 3693 | i40iw_cm_close(iwqp->cm_node); |
| 3694 | } |
| 3695 | } |
| 3696 | |
| 3697 | /** |
| 3698 | * i40iw_cm_disconn_true - called by worker thread to disconnect qp |
| 3699 | * @iwqp: associate qp for the connection |
| 3700 | */ |
| 3701 | static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp) |
| 3702 | { |
| 3703 | struct iw_cm_id *cm_id; |
| 3704 | struct i40iw_device *iwdev; |
| 3705 | struct i40iw_sc_qp *qp = &iwqp->sc_qp; |
| 3706 | u16 last_ae; |
| 3707 | u8 original_hw_tcp_state; |
| 3708 | u8 original_ibqp_state; |
| 3709 | int disconn_status = 0; |
| 3710 | int issue_disconn = 0; |
| 3711 | int issue_close = 0; |
| 3712 | int issue_flush = 0; |
| 3713 | struct ib_event ibevent; |
| 3714 | unsigned long flags; |
| 3715 | int ret; |
| 3716 | |
| 3717 | if (!iwqp) { |
| 3718 | i40iw_pr_err("iwqp == NULL\n"); |
| 3719 | return; |
| 3720 | } |
| 3721 | |
| 3722 | spin_lock_irqsave(&iwqp->lock, flags); |
| 3723 | cm_id = iwqp->cm_id; |
| 3724 | /* make sure we havent already closed this connection */ |
| 3725 | if (!cm_id) { |
| 3726 | spin_unlock_irqrestore(&iwqp->lock, flags); |
| 3727 | return; |
| 3728 | } |
| 3729 | |
| 3730 | iwdev = to_iwdev(iwqp->ibqp.device); |
| 3731 | |
| 3732 | original_hw_tcp_state = iwqp->hw_tcp_state; |
| 3733 | original_ibqp_state = iwqp->ibqp_state; |
| 3734 | last_ae = iwqp->last_aeq; |
| 3735 | |
| 3736 | if (qp->term_flags) { |
| 3737 | issue_disconn = 1; |
| 3738 | issue_close = 1; |
| 3739 | iwqp->cm_id = NULL; |
| 3740 | /*When term timer expires after cm_timer, don't want |
| 3741 | *terminate-handler to issue cm_disconn which can re-free |
| 3742 | *a QP even after its refcnt=0. |
| 3743 | */ |
| 3744 | del_timer(&iwqp->terminate_timer); |
| 3745 | if (!iwqp->flush_issued) { |
| 3746 | iwqp->flush_issued = 1; |
| 3747 | issue_flush = 1; |
| 3748 | } |
| 3749 | } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) || |
| 3750 | ((original_ibqp_state == IB_QPS_RTS) && |
| 3751 | (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) { |
| 3752 | issue_disconn = 1; |
| 3753 | if (last_ae == I40IW_AE_LLP_CONNECTION_RESET) |
| 3754 | disconn_status = -ECONNRESET; |
| 3755 | } |
| 3756 | |
| 3757 | if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) || |
| 3758 | (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) || |
| 3759 | (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) || |
| 3760 | (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) { |
| 3761 | issue_close = 1; |
| 3762 | iwqp->cm_id = NULL; |
| 3763 | if (!iwqp->flush_issued) { |
| 3764 | iwqp->flush_issued = 1; |
| 3765 | issue_flush = 1; |
| 3766 | } |
| 3767 | } |
| 3768 | |
| 3769 | spin_unlock_irqrestore(&iwqp->lock, flags); |
| 3770 | if (issue_flush && !iwqp->destroyed) { |
| 3771 | /* Flush the queues */ |
| 3772 | i40iw_flush_wqes(iwdev, iwqp); |
| 3773 | |
| 3774 | if (qp->term_flags) { |
| 3775 | ibevent.device = iwqp->ibqp.device; |
| 3776 | ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ? |
| 3777 | IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR; |
| 3778 | ibevent.element.qp = &iwqp->ibqp; |
| 3779 | iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context); |
| 3780 | } |
| 3781 | } |
| 3782 | |
| 3783 | if (cm_id && cm_id->event_handler) { |
| 3784 | if (issue_disconn) { |
| 3785 | ret = i40iw_send_cm_event(NULL, |
| 3786 | cm_id, |
| 3787 | IW_CM_EVENT_DISCONNECT, |
| 3788 | disconn_status); |
| 3789 | |
| 3790 | if (ret) |
| 3791 | i40iw_debug(&iwdev->sc_dev, |
| 3792 | I40IW_DEBUG_CM, |
| 3793 | "disconnect event failed %s: - cm_id = %p\n", |
| 3794 | __func__, cm_id); |
| 3795 | } |
| 3796 | if (issue_close) { |
| 3797 | i40iw_qp_disconnect(iwqp); |
| 3798 | cm_id->provider_data = iwqp; |
| 3799 | ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0); |
| 3800 | if (ret) |
| 3801 | i40iw_debug(&iwdev->sc_dev, |
| 3802 | I40IW_DEBUG_CM, |
| 3803 | "close event failed %s: - cm_id = %p\n", |
| 3804 | __func__, cm_id); |
| 3805 | cm_id->rem_ref(cm_id); |
| 3806 | } |
| 3807 | } |
| 3808 | } |
| 3809 | |
| 3810 | /** |
| 3811 | * i40iw_disconnect_worker - worker for connection close |
| 3812 | * @work: points or disconn structure |
| 3813 | */ |
| 3814 | static void i40iw_disconnect_worker(struct work_struct *work) |
| 3815 | { |
| 3816 | struct disconn_work *dwork = container_of(work, struct disconn_work, work); |
| 3817 | struct i40iw_qp *iwqp = dwork->iwqp; |
| 3818 | |
| 3819 | kfree(dwork); |
| 3820 | i40iw_cm_disconn_true(iwqp); |
| 3821 | i40iw_rem_ref(&iwqp->ibqp); |
| 3822 | } |
| 3823 | |
| 3824 | /** |
| 3825 | * i40iw_accept - registered call for connection to be accepted |
| 3826 | * @cm_id: cm information for passive connection |
| 3827 | * @conn_param: accpet parameters |
| 3828 | */ |
| 3829 | int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
| 3830 | { |
| 3831 | struct ib_qp *ibqp; |
| 3832 | struct i40iw_qp *iwqp; |
| 3833 | struct i40iw_device *iwdev; |
| 3834 | struct i40iw_sc_dev *dev; |
| 3835 | struct i40iw_cm_node *cm_node; |
| 3836 | struct ib_qp_attr attr; |
| 3837 | int passive_state; |
| 3838 | struct i40iw_ib_device *iwibdev; |
| 3839 | struct ib_mr *ibmr; |
| 3840 | struct i40iw_pd *iwpd; |
| 3841 | u16 buf_len = 0; |
| 3842 | struct i40iw_kmem_info accept; |
| 3843 | enum i40iw_status_code status; |
| 3844 | u64 tagged_offset; |
| 3845 | |
| 3846 | memset(&attr, 0, sizeof(attr)); |
| 3847 | ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); |
| 3848 | if (!ibqp) |
| 3849 | return -EINVAL; |
| 3850 | |
| 3851 | iwqp = to_iwqp(ibqp); |
| 3852 | iwdev = iwqp->iwdev; |
| 3853 | dev = &iwdev->sc_dev; |
| 3854 | cm_node = (struct i40iw_cm_node *)cm_id->provider_data; |
| 3855 | |
| 3856 | if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { |
| 3857 | cm_node->ipv4 = true; |
| 3858 | cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr); |
| 3859 | } else { |
| 3860 | cm_node->ipv4 = false; |
| 3861 | i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL); |
| 3862 | } |
| 3863 | i40iw_debug(cm_node->dev, |
| 3864 | I40IW_DEBUG_CM, |
| 3865 | "Accept vlan_id=%d\n", |
| 3866 | cm_node->vlan_id); |
| 3867 | if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { |
| 3868 | if (cm_node->loopbackpartner) |
| 3869 | i40iw_rem_ref_cm_node(cm_node->loopbackpartner); |
| 3870 | i40iw_rem_ref_cm_node(cm_node); |
| 3871 | return -EINVAL; |
| 3872 | } |
| 3873 | |
| 3874 | passive_state = atomic_add_return(1, &cm_node->passive_state); |
| 3875 | if (passive_state == I40IW_SEND_RESET_EVENT) { |
| 3876 | i40iw_rem_ref_cm_node(cm_node); |
| 3877 | return -ECONNRESET; |
| 3878 | } |
| 3879 | |
| 3880 | cm_node->cm_core->stats_accepts++; |
| 3881 | iwqp->cm_node = (void *)cm_node; |
| 3882 | cm_node->iwqp = iwqp; |
| 3883 | |
| 3884 | buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE + MPA_ZERO_PAD_LEN; |
| 3885 | |
| 3886 | status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1); |
| 3887 | |
| 3888 | if (status) |
| 3889 | return -ENOMEM; |
| 3890 | cm_node->pdata.size = conn_param->private_data_len; |
| 3891 | accept.addr = iwqp->ietf_mem.va; |
| 3892 | accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); |
| 3893 | memcpy(accept.addr + accept.size, conn_param->private_data, |
| 3894 | conn_param->private_data_len); |
| 3895 | |
| 3896 | /* setup our first outgoing iWarp send WQE (the IETF frame response) */ |
| 3897 | if ((cm_node->ipv4 && |
| 3898 | !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || |
| 3899 | (!cm_node->ipv4 && |
| 3900 | !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) { |
| 3901 | iwibdev = iwdev->iwibdev; |
| 3902 | iwpd = iwqp->iwpd; |
| 3903 | tagged_offset = (uintptr_t)iwqp->ietf_mem.va; |
| 3904 | ibmr = i40iw_reg_phys_mr(&iwpd->ibpd, |
| 3905 | iwqp->ietf_mem.pa, |
| 3906 | buf_len, |
| 3907 | IB_ACCESS_LOCAL_WRITE, |
| 3908 | &tagged_offset); |
| 3909 | if (IS_ERR(ibmr)) { |
| 3910 | i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem); |
| 3911 | return -ENOMEM; |
| 3912 | } |
| 3913 | |
| 3914 | ibmr->pd = &iwpd->ibpd; |
| 3915 | ibmr->device = iwpd->ibpd.device; |
| 3916 | iwqp->lsmm_mr = ibmr; |
| 3917 | if (iwqp->page) |
| 3918 | iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); |
| 3919 | if (is_remote_ne020_or_chelsio(cm_node)) |
| 3920 | dev->iw_priv_qp_ops->qp_send_lsmm( |
| 3921 | &iwqp->sc_qp, |
| 3922 | iwqp->ietf_mem.va, |
| 3923 | (accept.size + conn_param->private_data_len), |
| 3924 | ibmr->lkey); |
| 3925 | else |
| 3926 | dev->iw_priv_qp_ops->qp_send_lsmm( |
| 3927 | &iwqp->sc_qp, |
| 3928 | iwqp->ietf_mem.va, |
| 3929 | (accept.size + conn_param->private_data_len + MPA_ZERO_PAD_LEN), |
| 3930 | ibmr->lkey); |
| 3931 | |
| 3932 | } else { |
| 3933 | if (iwqp->page) |
| 3934 | iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); |
| 3935 | i40iw_loopback_nop(&iwqp->sc_qp); |
| 3936 | } |
| 3937 | |
| 3938 | if (iwqp->page) |
| 3939 | kunmap(iwqp->page); |
| 3940 | |
| 3941 | iwqp->cm_id = cm_id; |
| 3942 | cm_node->cm_id = cm_id; |
| 3943 | |
| 3944 | cm_id->provider_data = (void *)iwqp; |
| 3945 | iwqp->active_conn = 0; |
| 3946 | |
| 3947 | cm_node->lsmm_size = accept.size + conn_param->private_data_len; |
| 3948 | i40iw_cm_init_tsa_conn(iwqp, cm_node); |
| 3949 | cm_id->add_ref(cm_id); |
| 3950 | i40iw_add_ref(&iwqp->ibqp); |
| 3951 | |
| 3952 | i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); |
| 3953 | |
| 3954 | attr.qp_state = IB_QPS_RTS; |
| 3955 | cm_node->qhash_set = false; |
| 3956 | i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); |
| 3957 | if (cm_node->loopbackpartner) { |
| 3958 | cm_node->loopbackpartner->pdata.size = conn_param->private_data_len; |
| 3959 | |
| 3960 | /* copy entire MPA frame to our cm_node's frame */ |
| 3961 | memcpy(cm_node->loopbackpartner->pdata_buf, |
| 3962 | conn_param->private_data, |
| 3963 | conn_param->private_data_len); |
| 3964 | i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED); |
| 3965 | } |
| 3966 | |
| 3967 | cm_node->accelerated = 1; |
| 3968 | if (cm_node->accept_pend) { |
| 3969 | if (!cm_node->listener) |
| 3970 | i40iw_pr_err("cm_node->listener NULL for passive node\n"); |
| 3971 | atomic_dec(&cm_node->listener->pend_accepts_cnt); |
| 3972 | cm_node->accept_pend = 0; |
| 3973 | } |
| 3974 | return 0; |
| 3975 | } |
| 3976 | |
| 3977 | /** |
| 3978 | * i40iw_reject - registered call for connection to be rejected |
| 3979 | * @cm_id: cm information for passive connection |
| 3980 | * @pdata: private data to be sent |
| 3981 | * @pdata_len: private data length |
| 3982 | */ |
| 3983 | int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) |
| 3984 | { |
| 3985 | struct i40iw_device *iwdev; |
| 3986 | struct i40iw_cm_node *cm_node; |
| 3987 | struct i40iw_cm_node *loopback; |
| 3988 | |
| 3989 | cm_node = (struct i40iw_cm_node *)cm_id->provider_data; |
| 3990 | loopback = cm_node->loopbackpartner; |
| 3991 | cm_node->cm_id = cm_id; |
| 3992 | cm_node->pdata.size = pdata_len; |
| 3993 | |
| 3994 | iwdev = to_iwdev(cm_id->device); |
| 3995 | if (!iwdev) |
| 3996 | return -EINVAL; |
| 3997 | cm_node->cm_core->stats_rejects++; |
| 3998 | |
| 3999 | if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER) |
| 4000 | return -EINVAL; |
| 4001 | |
| 4002 | if (loopback) { |
| 4003 | memcpy(&loopback->pdata_buf, pdata, pdata_len); |
| 4004 | loopback->pdata.size = pdata_len; |
| 4005 | } |
| 4006 | |
| 4007 | return i40iw_cm_reject(cm_node, pdata, pdata_len); |
| 4008 | } |
| 4009 | |
| 4010 | /** |
| 4011 | * i40iw_connect - registered call for connection to be established |
| 4012 | * @cm_id: cm information for passive connection |
| 4013 | * @conn_param: Information about the connection |
| 4014 | */ |
| 4015 | int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
| 4016 | { |
| 4017 | struct ib_qp *ibqp; |
| 4018 | struct i40iw_qp *iwqp; |
| 4019 | struct i40iw_device *iwdev; |
| 4020 | struct i40iw_cm_node *cm_node; |
| 4021 | struct i40iw_cm_info cm_info; |
| 4022 | struct sockaddr_in *laddr; |
| 4023 | struct sockaddr_in *raddr; |
| 4024 | struct sockaddr_in6 *laddr6; |
| 4025 | struct sockaddr_in6 *raddr6; |
| 4026 | struct iwpm_dev_data pm_reg_msg; |
| 4027 | struct iwpm_sa_data pm_msg; |
| 4028 | int apbvt_set = 0; |
| 4029 | enum i40iw_status_code status; |
| 4030 | int iwpm_err; |
| 4031 | |
| 4032 | ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); |
| 4033 | if (!ibqp) |
| 4034 | return -EINVAL; |
| 4035 | iwqp = to_iwqp(ibqp); |
| 4036 | if (!iwqp) |
| 4037 | return -EINVAL; |
| 4038 | iwdev = to_iwdev(iwqp->ibqp.device); |
| 4039 | if (!iwdev) |
| 4040 | return -EINVAL; |
| 4041 | |
| 4042 | laddr = (struct sockaddr_in *)&cm_id->local_addr; |
| 4043 | raddr = (struct sockaddr_in *)&cm_id->remote_addr; |
| 4044 | laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr; |
| 4045 | raddr6 = (struct sockaddr_in6 *)&cm_id->remote_addr; |
| 4046 | |
| 4047 | if (!(laddr->sin_port) || !(raddr->sin_port)) |
| 4048 | return -EINVAL; |
| 4049 | |
| 4050 | iwqp->active_conn = 1; |
| 4051 | iwqp->cm_id = NULL; |
| 4052 | cm_id->provider_data = iwqp; |
| 4053 | |
| 4054 | /* set up the connection params for the node */ |
| 4055 | if (cm_id->remote_addr.ss_family == AF_INET) { |
| 4056 | cm_info.ipv4 = true; |
| 4057 | memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); |
| 4058 | memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); |
| 4059 | cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); |
| 4060 | cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); |
| 4061 | cm_info.loc_port = ntohs(laddr->sin_port); |
| 4062 | cm_info.rem_port = ntohs(raddr->sin_port); |
| 4063 | cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); |
| 4064 | } else { |
| 4065 | cm_info.ipv4 = false; |
| 4066 | i40iw_copy_ip_ntohl(cm_info.loc_addr, |
| 4067 | laddr6->sin6_addr.in6_u.u6_addr32); |
| 4068 | i40iw_copy_ip_ntohl(cm_info.rem_addr, |
| 4069 | raddr6->sin6_addr.in6_u.u6_addr32); |
| 4070 | cm_info.loc_port = ntohs(laddr6->sin6_port); |
| 4071 | cm_info.rem_port = ntohs(raddr6->sin6_port); |
| 4072 | i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL); |
| 4073 | } |
| 4074 | i40iw_init_mapinfo(&cm_info); |
| 4075 | cm_info.cm_id = cm_id; |
| 4076 | |
| 4077 | i40iw_form_reg_msg(iwdev, &pm_reg_msg); |
| 4078 | iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_I40IW); |
| 4079 | if (iwpm_err) |
| 4080 | i40iw_pr_err("PM register fail err = %d\n", |
| 4081 | iwpm_err); |
| 4082 | |
| 4083 | if (iwpm_valid_pid() && !iwpm_err) { |
| 4084 | i40iw_form_pm_msg(&cm_info, &pm_msg); |
| 4085 | iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_I40IW); |
| 4086 | if (iwpm_err) |
| 4087 | i40iw_pr_err("PM query fail err = %d\n", |
| 4088 | iwpm_err); |
| 4089 | else |
| 4090 | i40iw_record_pm_msg(&cm_info, &pm_msg, true); |
| 4091 | } |
| 4092 | |
| 4093 | if (i40iw_create_mapinfo(&cm_info)) { |
| 4094 | i40iw_pr_err("Fail to create mapinfo\n"); |
| 4095 | return -ENOMEM; |
| 4096 | } |
| 4097 | |
| 4098 | if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) || |
| 4099 | (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32, |
| 4100 | raddr6->sin6_addr.in6_u.u6_addr32, |
| 4101 | sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) { |
| 4102 | status = i40iw_manage_qhash(iwdev, |
| 4103 | &cm_info, |
| 4104 | I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
| 4105 | I40IW_QHASH_MANAGE_TYPE_ADD, |
| 4106 | NULL, |
| 4107 | true); |
| 4108 | if (status) { |
| 4109 | i40iw_remove_mapinfo(&cm_info); |
| 4110 | return -EINVAL; |
| 4111 | } |
| 4112 | } |
| 4113 | status = i40iw_manage_apbvt(iwdev, cm_info.map_loc_port, I40IW_MANAGE_APBVT_ADD); |
| 4114 | if (status) { |
| 4115 | i40iw_remove_mapinfo(&cm_info); |
| 4116 | i40iw_manage_qhash(iwdev, |
| 4117 | &cm_info, |
| 4118 | I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
| 4119 | I40IW_QHASH_MANAGE_TYPE_DELETE, |
| 4120 | NULL, |
| 4121 | false); |
| 4122 | return -EINVAL; |
| 4123 | } |
| 4124 | |
| 4125 | apbvt_set = 1; |
| 4126 | cm_id->add_ref(cm_id); |
| 4127 | cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev, |
| 4128 | conn_param->private_data_len, |
| 4129 | (void *)conn_param->private_data, |
| 4130 | &cm_info); |
| 4131 | if (!cm_node) { |
| 4132 | i40iw_manage_qhash(iwdev, |
| 4133 | &cm_info, |
| 4134 | I40IW_QHASH_TYPE_TCP_ESTABLISHED, |
| 4135 | I40IW_QHASH_MANAGE_TYPE_DELETE, |
| 4136 | NULL, |
| 4137 | false); |
| 4138 | |
| 4139 | if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core, |
| 4140 | cm_info.map_loc_port)) |
| 4141 | i40iw_manage_apbvt(iwdev, |
| 4142 | cm_info.map_loc_port, |
| 4143 | I40IW_MANAGE_APBVT_DEL); |
| 4144 | |
| 4145 | i40iw_remove_mapinfo(&cm_info); |
| 4146 | cm_id->rem_ref(cm_id); |
| 4147 | iwdev->cm_core.stats_connect_errs++; |
| 4148 | return -ENOMEM; |
| 4149 | } |
| 4150 | |
| 4151 | i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord); |
| 4152 | if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO && |
| 4153 | !cm_node->ord_size) |
| 4154 | cm_node->ord_size = 1; |
| 4155 | |
| 4156 | cm_node->apbvt_set = apbvt_set; |
| 4157 | cm_node->qhash_set = true; |
| 4158 | iwqp->cm_node = cm_node; |
| 4159 | cm_node->iwqp = iwqp; |
| 4160 | iwqp->cm_id = cm_id; |
| 4161 | i40iw_add_ref(&iwqp->ibqp); |
| 4162 | return 0; |
| 4163 | } |
| 4164 | |
| 4165 | /** |
| 4166 | * i40iw_create_listen - registered call creating listener |
| 4167 | * @cm_id: cm information for passive connection |
| 4168 | * @backlog: to max accept pending count |
| 4169 | */ |
| 4170 | int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog) |
| 4171 | { |
| 4172 | struct i40iw_device *iwdev; |
| 4173 | struct i40iw_cm_listener *cm_listen_node; |
| 4174 | struct i40iw_cm_info cm_info; |
| 4175 | enum i40iw_status_code ret; |
| 4176 | struct sockaddr_in *laddr; |
| 4177 | struct sockaddr_in6 *laddr6; |
| 4178 | bool wildcard = false; |
| 4179 | |
| 4180 | iwdev = to_iwdev(cm_id->device); |
| 4181 | if (!iwdev) |
| 4182 | return -EINVAL; |
| 4183 | |
| 4184 | laddr = (struct sockaddr_in *)&cm_id->local_addr; |
| 4185 | laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr; |
| 4186 | memset(&cm_info, 0, sizeof(cm_info)); |
| 4187 | if (laddr->sin_family == AF_INET) { |
| 4188 | cm_info.ipv4 = true; |
| 4189 | cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); |
| 4190 | cm_info.loc_port = ntohs(laddr->sin_port); |
| 4191 | |
| 4192 | if (laddr->sin_addr.s_addr != INADDR_ANY) |
| 4193 | cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); |
| 4194 | else |
| 4195 | wildcard = true; |
| 4196 | |
| 4197 | } else { |
| 4198 | cm_info.ipv4 = false; |
| 4199 | i40iw_copy_ip_ntohl(cm_info.loc_addr, |
| 4200 | laddr6->sin6_addr.in6_u.u6_addr32); |
| 4201 | cm_info.loc_port = ntohs(laddr6->sin6_port); |
| 4202 | if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) |
| 4203 | i40iw_netdev_vlan_ipv6(cm_info.loc_addr, |
| 4204 | &cm_info.vlan_id, |
| 4205 | NULL); |
| 4206 | else |
| 4207 | wildcard = true; |
| 4208 | } |
| 4209 | i40iw_init_mapinfo(&cm_info); |
| 4210 | cm_info.backlog = backlog; |
| 4211 | cm_info.cm_id = cm_id; |
| 4212 | |
| 4213 | cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info); |
| 4214 | if (!cm_listen_node) { |
| 4215 | i40iw_pr_err("cm_listen_node == NULL\n"); |
| 4216 | return -ENOMEM; |
| 4217 | } |
| 4218 | |
| 4219 | cm_id->provider_data = cm_listen_node; |
| 4220 | |
| 4221 | if (!cm_listen_node->reused_node) { |
| 4222 | if (i40iw_create_mapinfo(&cm_info)) |
| 4223 | goto error; |
| 4224 | if (wildcard) { |
| 4225 | if (cm_info.ipv4) |
| 4226 | ret = i40iw_add_mqh_4(iwdev, |
| 4227 | &cm_info, |
| 4228 | cm_listen_node); |
| 4229 | else |
| 4230 | ret = i40iw_add_mqh_6(iwdev, |
| 4231 | &cm_info, |
| 4232 | cm_listen_node); |
| 4233 | if (ret) |
| 4234 | goto error; |
| 4235 | |
| 4236 | ret = i40iw_manage_apbvt(iwdev, |
| 4237 | cm_info.map_loc_port, |
| 4238 | I40IW_MANAGE_APBVT_ADD); |
| 4239 | |
| 4240 | if (ret) |
| 4241 | goto error; |
| 4242 | } else { |
| 4243 | ret = i40iw_manage_qhash(iwdev, |
| 4244 | &cm_info, |
| 4245 | I40IW_QHASH_TYPE_TCP_SYN, |
| 4246 | I40IW_QHASH_MANAGE_TYPE_ADD, |
| 4247 | NULL, |
| 4248 | true); |
| 4249 | if (ret) |
| 4250 | goto error; |
| 4251 | cm_listen_node->qhash_set = true; |
| 4252 | ret = i40iw_manage_apbvt(iwdev, |
| 4253 | cm_info.map_loc_port, |
| 4254 | I40IW_MANAGE_APBVT_ADD); |
| 4255 | if (ret) |
| 4256 | goto error; |
| 4257 | } |
| 4258 | } |
| 4259 | cm_id->add_ref(cm_id); |
| 4260 | cm_listen_node->cm_core->stats_listen_created++; |
| 4261 | return 0; |
| 4262 | error: |
| 4263 | i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false); |
| 4264 | return -EINVAL; |
| 4265 | } |
| 4266 | |
| 4267 | /** |
| 4268 | * i40iw_destroy_listen - registered call to destroy listener |
| 4269 | * @cm_id: cm information for passive connection |
| 4270 | */ |
| 4271 | int i40iw_destroy_listen(struct iw_cm_id *cm_id) |
| 4272 | { |
| 4273 | struct i40iw_device *iwdev; |
| 4274 | |
| 4275 | iwdev = to_iwdev(cm_id->device); |
| 4276 | if (cm_id->provider_data) |
| 4277 | i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true); |
| 4278 | else |
| 4279 | i40iw_pr_err("cm_id->provider_data was NULL\n"); |
| 4280 | |
| 4281 | cm_id->rem_ref(cm_id); |
| 4282 | |
| 4283 | return 0; |
| 4284 | } |
| 4285 | |
| 4286 | /** |
| 4287 | * i40iw_cm_event_connected - handle connected active node |
| 4288 | * @event: the info for cm_node of connection |
| 4289 | */ |
| 4290 | static void i40iw_cm_event_connected(struct i40iw_cm_event *event) |
| 4291 | { |
| 4292 | struct i40iw_qp *iwqp; |
| 4293 | struct i40iw_device *iwdev; |
| 4294 | struct i40iw_cm_node *cm_node; |
| 4295 | struct i40iw_sc_dev *dev; |
| 4296 | struct ib_qp_attr attr; |
| 4297 | struct iw_cm_id *cm_id; |
| 4298 | int status; |
| 4299 | bool read0; |
| 4300 | |
| 4301 | cm_node = event->cm_node; |
| 4302 | cm_id = cm_node->cm_id; |
| 4303 | iwqp = (struct i40iw_qp *)cm_id->provider_data; |
| 4304 | iwdev = to_iwdev(iwqp->ibqp.device); |
| 4305 | dev = &iwdev->sc_dev; |
| 4306 | |
| 4307 | if (iwqp->destroyed) { |
| 4308 | status = -ETIMEDOUT; |
| 4309 | goto error; |
| 4310 | } |
| 4311 | i40iw_cm_init_tsa_conn(iwqp, cm_node); |
| 4312 | read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); |
| 4313 | if (iwqp->page) |
| 4314 | iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page); |
| 4315 | dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0); |
| 4316 | if (iwqp->page) |
| 4317 | kunmap(iwqp->page); |
| 4318 | status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); |
| 4319 | if (status) |
| 4320 | i40iw_pr_err("send cm event\n"); |
| 4321 | |
| 4322 | memset(&attr, 0, sizeof(attr)); |
| 4323 | attr.qp_state = IB_QPS_RTS; |
| 4324 | cm_node->qhash_set = false; |
| 4325 | i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); |
| 4326 | |
| 4327 | cm_node->accelerated = 1; |
| 4328 | if (cm_node->accept_pend) { |
| 4329 | if (!cm_node->listener) |
| 4330 | i40iw_pr_err("listener is null for passive node\n"); |
| 4331 | atomic_dec(&cm_node->listener->pend_accepts_cnt); |
| 4332 | cm_node->accept_pend = 0; |
| 4333 | } |
| 4334 | return; |
| 4335 | |
| 4336 | error: |
| 4337 | iwqp->cm_id = NULL; |
| 4338 | cm_id->provider_data = NULL; |
| 4339 | i40iw_send_cm_event(event->cm_node, |
| 4340 | cm_id, |
| 4341 | IW_CM_EVENT_CONNECT_REPLY, |
| 4342 | status); |
| 4343 | cm_id->rem_ref(cm_id); |
| 4344 | i40iw_rem_ref_cm_node(event->cm_node); |
| 4345 | } |
| 4346 | |
| 4347 | /** |
| 4348 | * i40iw_cm_event_reset - handle reset |
| 4349 | * @event: the info for cm_node of connection |
| 4350 | */ |
| 4351 | static void i40iw_cm_event_reset(struct i40iw_cm_event *event) |
| 4352 | { |
| 4353 | struct i40iw_cm_node *cm_node = event->cm_node; |
| 4354 | struct iw_cm_id *cm_id = cm_node->cm_id; |
| 4355 | struct i40iw_qp *iwqp; |
| 4356 | |
| 4357 | if (!cm_id) |
| 4358 | return; |
| 4359 | |
| 4360 | iwqp = cm_id->provider_data; |
| 4361 | if (!iwqp) |
| 4362 | return; |
| 4363 | |
| 4364 | i40iw_debug(cm_node->dev, |
| 4365 | I40IW_DEBUG_CM, |
| 4366 | "reset event %p - cm_id = %p\n", |
| 4367 | event->cm_node, cm_id); |
| 4368 | iwqp->cm_id = NULL; |
| 4369 | |
| 4370 | i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET); |
| 4371 | i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); |
| 4372 | } |
| 4373 | |
| 4374 | /** |
| 4375 | * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer |
| 4376 | * @work: pointer of cm event info. |
| 4377 | */ |
| 4378 | static void i40iw_cm_event_handler(struct work_struct *work) |
| 4379 | { |
| 4380 | struct i40iw_cm_event *event = container_of(work, |
| 4381 | struct i40iw_cm_event, |
| 4382 | event_work); |
| 4383 | struct i40iw_cm_node *cm_node; |
| 4384 | |
| 4385 | if (!event || !event->cm_node || !event->cm_node->cm_core) |
| 4386 | return; |
| 4387 | |
| 4388 | cm_node = event->cm_node; |
| 4389 | |
| 4390 | switch (event->type) { |
| 4391 | case I40IW_CM_EVENT_MPA_REQ: |
| 4392 | i40iw_send_cm_event(cm_node, |
| 4393 | cm_node->cm_id, |
| 4394 | IW_CM_EVENT_CONNECT_REQUEST, |
| 4395 | 0); |
| 4396 | break; |
| 4397 | case I40IW_CM_EVENT_RESET: |
| 4398 | i40iw_cm_event_reset(event); |
| 4399 | break; |
| 4400 | case I40IW_CM_EVENT_CONNECTED: |
| 4401 | if (!event->cm_node->cm_id || |
| 4402 | (event->cm_node->state != I40IW_CM_STATE_OFFLOADED)) |
| 4403 | break; |
| 4404 | i40iw_cm_event_connected(event); |
| 4405 | break; |
| 4406 | case I40IW_CM_EVENT_MPA_REJECT: |
| 4407 | if (!event->cm_node->cm_id || |
| 4408 | (cm_node->state == I40IW_CM_STATE_OFFLOADED)) |
| 4409 | break; |
| 4410 | i40iw_send_cm_event(cm_node, |
| 4411 | cm_node->cm_id, |
| 4412 | IW_CM_EVENT_CONNECT_REPLY, |
| 4413 | -ECONNREFUSED); |
| 4414 | break; |
| 4415 | case I40IW_CM_EVENT_ABORTED: |
| 4416 | if (!event->cm_node->cm_id || |
| 4417 | (event->cm_node->state == I40IW_CM_STATE_OFFLOADED)) |
| 4418 | break; |
| 4419 | i40iw_event_connect_error(event); |
| 4420 | break; |
| 4421 | default: |
| 4422 | i40iw_pr_err("event type = %d\n", event->type); |
| 4423 | break; |
| 4424 | } |
| 4425 | |
| 4426 | event->cm_info.cm_id->rem_ref(event->cm_info.cm_id); |
| 4427 | i40iw_rem_ref_cm_node(event->cm_node); |
| 4428 | kfree(event); |
| 4429 | } |
| 4430 | |
| 4431 | /** |
| 4432 | * i40iw_cm_post_event - queue event request for worker thread |
| 4433 | * @event: cm node's info for up event call |
| 4434 | */ |
| 4435 | static void i40iw_cm_post_event(struct i40iw_cm_event *event) |
| 4436 | { |
| 4437 | atomic_inc(&event->cm_node->ref_count); |
| 4438 | event->cm_info.cm_id->add_ref(event->cm_info.cm_id); |
| 4439 | INIT_WORK(&event->event_work, i40iw_cm_event_handler); |
| 4440 | |
| 4441 | queue_work(event->cm_node->cm_core->event_wq, &event->event_work); |
| 4442 | } |