Chris Lew | 42ea961 | 2017-10-04 15:58:16 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2011-2017, The Linux Foundation. All rights reserved. |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/types.h> |
| 15 | #include <linux/net.h> |
| 16 | #include <linux/socket.h> |
| 17 | #include <linux/errno.h> |
| 18 | #include <linux/mm.h> |
| 19 | #include <linux/poll.h> |
| 20 | #include <linux/fcntl.h> |
| 21 | #include <linux/gfp.h> |
| 22 | #include <linux/msm_ipc.h> |
| 23 | #include <linux/sched.h> |
| 24 | #include <linux/thread_info.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/kmemleak.h> |
| 27 | #include <linux/ipc_logging.h> |
| 28 | #include <linux/string.h> |
| 29 | #include <linux/atomic.h> |
| 30 | #include <linux/ipc_router.h> |
| 31 | |
| 32 | #include <net/sock.h> |
| 33 | |
| 34 | #include "ipc_router_private.h" |
| 35 | #include "ipc_router_security.h" |
| 36 | |
| 37 | #define msm_ipc_sk(sk) ((struct msm_ipc_sock *)(sk)) |
| 38 | #define msm_ipc_sk_port(sk) ((struct msm_ipc_port *)(msm_ipc_sk(sk)->port)) |
| 39 | |
| 40 | #ifndef SIZE_MAX |
| 41 | #define SIZE_MAX ((size_t)-1) |
| 42 | #endif |
| 43 | |
| 44 | static int sockets_enabled; |
| 45 | static struct proto msm_ipc_proto; |
| 46 | static const struct proto_ops msm_ipc_proto_ops; |
| 47 | static RAW_NOTIFIER_HEAD(ipcrtr_af_init_chain); |
| 48 | static DEFINE_MUTEX(ipcrtr_af_init_lock); |
| 49 | |
| 50 | static struct sk_buff_head *msm_ipc_router_build_msg(struct msghdr *m, |
| 51 | size_t total_len) |
| 52 | { |
| 53 | struct sk_buff_head *msg_head; |
| 54 | struct sk_buff *msg; |
| 55 | int first = 1; |
| 56 | int last = 1; |
| 57 | size_t data_size = 0; |
| 58 | size_t alloc_size, align_size; |
| 59 | void *data; |
| 60 | size_t total_copied_size = 0, copied_size; |
| 61 | |
| 62 | if (iov_iter_count(&m->msg_iter) == total_len) |
| 63 | data_size = total_len; |
| 64 | |
| 65 | if (!data_size) |
| 66 | return NULL; |
| 67 | align_size = ALIGN_SIZE(data_size); |
| 68 | |
| 69 | msg_head = kmalloc(sizeof(*msg_head), GFP_KERNEL); |
| 70 | if (!msg_head) { |
| 71 | IPC_RTR_ERR("%s: cannot allocate skb_head\n", __func__); |
| 72 | return NULL; |
| 73 | } |
| 74 | skb_queue_head_init(msg_head); |
| 75 | |
| 76 | while (total_copied_size < total_len) { |
| 77 | alloc_size = data_size; |
| 78 | if (first) |
| 79 | alloc_size += IPC_ROUTER_HDR_SIZE; |
| 80 | if (last) |
| 81 | alloc_size += align_size; |
| 82 | |
| 83 | msg = alloc_skb(alloc_size, GFP_KERNEL); |
| 84 | if (!msg) { |
| 85 | if (alloc_size <= (PAGE_SIZE / 2)) { |
| 86 | IPC_RTR_ERR("%s: cannot allocated skb\n", |
| 87 | __func__); |
| 88 | goto msg_build_failure; |
| 89 | } |
| 90 | data_size = data_size / 2; |
| 91 | last = 0; |
| 92 | continue; |
| 93 | } |
| 94 | |
| 95 | if (first) { |
| 96 | skb_reserve(msg, IPC_ROUTER_HDR_SIZE); |
| 97 | first = 0; |
| 98 | } |
| 99 | |
| 100 | data = skb_put(msg, data_size); |
| 101 | copied_size = copy_from_iter(msg->data, data_size, |
| 102 | &m->msg_iter); |
| 103 | if (copied_size != data_size) { |
| 104 | IPC_RTR_ERR("%s: copy_from_iter failed %zu %zu %zu\n", |
| 105 | __func__, alloc_size, data_size, |
| 106 | copied_size); |
| 107 | kfree_skb(msg); |
| 108 | goto msg_build_failure; |
| 109 | } |
| 110 | skb_queue_tail(msg_head, msg); |
| 111 | total_copied_size += data_size; |
| 112 | data_size = total_len - total_copied_size; |
| 113 | last = 1; |
| 114 | } |
| 115 | return msg_head; |
| 116 | |
| 117 | msg_build_failure: |
| 118 | while (!skb_queue_empty(msg_head)) { |
| 119 | msg = skb_dequeue(msg_head); |
| 120 | kfree_skb(msg); |
| 121 | } |
| 122 | kfree(msg_head); |
| 123 | return NULL; |
| 124 | } |
| 125 | |
| 126 | static int msm_ipc_router_extract_msg(struct msghdr *m, |
| 127 | struct rr_packet *pkt) |
| 128 | { |
| 129 | struct sockaddr_msm_ipc *addr; |
| 130 | struct rr_header_v1 *hdr; |
| 131 | struct sk_buff *temp; |
| 132 | union rr_control_msg *ctl_msg; |
| 133 | int offset = 0, data_len = 0, copy_len, copied_len; |
| 134 | |
| 135 | if (!m || !pkt) { |
| 136 | IPC_RTR_ERR("%s: Invalid pointers passed\n", __func__); |
| 137 | return -EINVAL; |
| 138 | } |
| 139 | addr = (struct sockaddr_msm_ipc *)m->msg_name; |
| 140 | |
| 141 | hdr = &pkt->hdr; |
| 142 | if (addr && (hdr->type == IPC_ROUTER_CTRL_CMD_RESUME_TX)) { |
| 143 | temp = skb_peek(pkt->pkt_fragment_q); |
Chris Lew | 42ea961 | 2017-10-04 15:58:16 -0700 | [diff] [blame] | 144 | if (!temp || !temp->data) { |
| 145 | IPC_RTR_ERR("%s: Invalid skb\n", __func__); |
| 146 | return -EINVAL; |
| 147 | } |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 148 | ctl_msg = (union rr_control_msg *)(temp->data); |
| 149 | addr->family = AF_MSM_IPC; |
| 150 | addr->address.addrtype = MSM_IPC_ADDR_ID; |
| 151 | addr->address.addr.port_addr.node_id = ctl_msg->cli.node_id; |
| 152 | addr->address.addr.port_addr.port_id = ctl_msg->cli.port_id; |
| 153 | m->msg_namelen = sizeof(struct sockaddr_msm_ipc); |
| 154 | return offset; |
| 155 | } |
| 156 | if (addr && (hdr->type == IPC_ROUTER_CTRL_CMD_DATA)) { |
| 157 | addr->family = AF_MSM_IPC; |
| 158 | addr->address.addrtype = MSM_IPC_ADDR_ID; |
| 159 | addr->address.addr.port_addr.node_id = hdr->src_node_id; |
| 160 | addr->address.addr.port_addr.port_id = hdr->src_port_id; |
| 161 | m->msg_namelen = sizeof(struct sockaddr_msm_ipc); |
| 162 | } |
| 163 | |
| 164 | data_len = hdr->size; |
| 165 | skb_queue_walk(pkt->pkt_fragment_q, temp) { |
| 166 | copy_len = data_len < temp->len ? data_len : temp->len; |
| 167 | copied_len = copy_to_iter(temp->data, copy_len, &m->msg_iter); |
| 168 | if (copy_len != copied_len) { |
| 169 | IPC_RTR_ERR("%s: Copy to user failed\n", __func__); |
| 170 | return -EFAULT; |
| 171 | } |
| 172 | offset += copy_len; |
| 173 | data_len -= copy_len; |
| 174 | } |
| 175 | return offset; |
| 176 | } |
| 177 | |
| 178 | static int msm_ipc_router_create(struct net *net, |
| 179 | struct socket *sock, |
| 180 | int protocol, |
| 181 | int kern) |
| 182 | { |
| 183 | struct sock *sk; |
| 184 | struct msm_ipc_port *port_ptr; |
| 185 | |
| 186 | if (unlikely(protocol != 0)) { |
| 187 | IPC_RTR_ERR("%s: Protocol not supported\n", __func__); |
| 188 | return -EPROTONOSUPPORT; |
| 189 | } |
| 190 | |
| 191 | switch (sock->type) { |
| 192 | case SOCK_DGRAM: |
| 193 | break; |
| 194 | default: |
| 195 | IPC_RTR_ERR("%s: Protocol type not supported\n", __func__); |
| 196 | return -EPROTOTYPE; |
| 197 | } |
| 198 | |
| 199 | sk = sk_alloc(net, AF_MSM_IPC, GFP_KERNEL, &msm_ipc_proto, kern); |
| 200 | if (!sk) { |
| 201 | IPC_RTR_ERR("%s: sk_alloc failed\n", __func__); |
| 202 | return -ENOMEM; |
| 203 | } |
| 204 | |
| 205 | sock->ops = &msm_ipc_proto_ops; |
| 206 | sock_init_data(sock, sk); |
| 207 | sk->sk_data_ready = NULL; |
| 208 | sk->sk_write_space = ipc_router_dummy_write_space; |
| 209 | sk->sk_rcvtimeo = DEFAULT_RCV_TIMEO; |
| 210 | sk->sk_sndtimeo = DEFAULT_SND_TIMEO; |
| 211 | |
| 212 | port_ptr = msm_ipc_router_create_raw_port(sk, NULL, NULL); |
| 213 | if (!port_ptr) { |
| 214 | IPC_RTR_ERR("%s: port_ptr alloc failed\n", __func__); |
| 215 | sock_put(sk); |
| 216 | sock->sk = NULL; |
| 217 | return -ENOMEM; |
| 218 | } |
| 219 | |
| 220 | port_ptr->check_send_permissions = msm_ipc_check_send_permissions; |
| 221 | msm_ipc_sk(sk)->port = port_ptr; |
| 222 | msm_ipc_sk(sk)->default_node_vote_info = NULL; |
| 223 | |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | int msm_ipc_router_bind(struct socket *sock, struct sockaddr *uaddr, |
| 228 | int uaddr_len) |
| 229 | { |
| 230 | struct sockaddr_msm_ipc *addr = (struct sockaddr_msm_ipc *)uaddr; |
| 231 | struct sock *sk = sock->sk; |
| 232 | struct msm_ipc_port *port_ptr; |
| 233 | int ret; |
| 234 | |
| 235 | if (!sk) |
| 236 | return -EINVAL; |
| 237 | |
| 238 | if (!check_permissions()) { |
| 239 | IPC_RTR_ERR("%s: %s Do not have permissions\n", |
| 240 | __func__, current->comm); |
| 241 | return -EPERM; |
| 242 | } |
| 243 | |
| 244 | if (!uaddr_len) { |
| 245 | IPC_RTR_ERR("%s: Invalid address length\n", __func__); |
| 246 | return -EINVAL; |
| 247 | } |
| 248 | |
| 249 | if (addr->family != AF_MSM_IPC) { |
| 250 | IPC_RTR_ERR("%s: Address family is incorrect\n", __func__); |
| 251 | return -EAFNOSUPPORT; |
| 252 | } |
| 253 | |
| 254 | if (addr->address.addrtype != MSM_IPC_ADDR_NAME) { |
| 255 | IPC_RTR_ERR("%s: Address type is incorrect\n", __func__); |
| 256 | return -EINVAL; |
| 257 | } |
| 258 | |
| 259 | port_ptr = msm_ipc_sk_port(sk); |
| 260 | if (!port_ptr) |
| 261 | return -ENODEV; |
| 262 | |
| 263 | if (!msm_ipc_sk(sk)->default_node_vote_info) |
| 264 | msm_ipc_sk(sk)->default_node_vote_info = |
| 265 | msm_ipc_load_default_node(); |
| 266 | lock_sock(sk); |
| 267 | |
| 268 | ret = msm_ipc_router_register_server(port_ptr, &addr->address); |
| 269 | |
| 270 | release_sock(sk); |
| 271 | return ret; |
| 272 | } |
| 273 | |
| 274 | static int ipc_router_connect(struct socket *sock, struct sockaddr *uaddr, |
| 275 | int uaddr_len, int flags) |
| 276 | { |
| 277 | struct sockaddr_msm_ipc *addr = (struct sockaddr_msm_ipc *)uaddr; |
| 278 | struct sock *sk = sock->sk; |
| 279 | struct msm_ipc_port *port_ptr; |
| 280 | int ret; |
| 281 | |
| 282 | if (!sk) |
| 283 | return -EINVAL; |
| 284 | |
| 285 | if (uaddr_len <= 0) { |
| 286 | IPC_RTR_ERR("%s: Invalid address length\n", __func__); |
| 287 | return -EINVAL; |
| 288 | } |
| 289 | |
| 290 | if (!addr) { |
| 291 | IPC_RTR_ERR("%s: Invalid address\n", __func__); |
| 292 | return -EINVAL; |
| 293 | } |
| 294 | |
| 295 | if (addr->family != AF_MSM_IPC) { |
| 296 | IPC_RTR_ERR("%s: Address family is incorrect\n", __func__); |
| 297 | return -EAFNOSUPPORT; |
| 298 | } |
| 299 | |
| 300 | port_ptr = msm_ipc_sk_port(sk); |
| 301 | if (!port_ptr) |
| 302 | return -ENODEV; |
| 303 | |
| 304 | lock_sock(sk); |
| 305 | ret = ipc_router_set_conn(port_ptr, &addr->address); |
| 306 | release_sock(sk); |
| 307 | return ret; |
| 308 | } |
| 309 | |
| 310 | static int msm_ipc_router_sendmsg(struct socket *sock, |
| 311 | struct msghdr *m, size_t total_len) |
| 312 | { |
| 313 | struct sock *sk = sock->sk; |
| 314 | struct msm_ipc_port *port_ptr = msm_ipc_sk_port(sk); |
| 315 | struct sockaddr_msm_ipc *dest = (struct sockaddr_msm_ipc *)m->msg_name; |
| 316 | struct sk_buff_head *msg; |
| 317 | int ret; |
| 318 | struct msm_ipc_addr dest_addr = {0}; |
| 319 | long timeout; |
| 320 | |
| 321 | if (dest) { |
| 322 | if (m->msg_namelen < sizeof(*dest) || |
| 323 | dest->family != AF_MSM_IPC) |
| 324 | return -EINVAL; |
| 325 | memcpy(&dest_addr, &dest->address, sizeof(dest_addr)); |
| 326 | } else { |
| 327 | if (port_ptr->conn_status == NOT_CONNECTED) |
| 328 | return -EDESTADDRREQ; |
| 329 | if (port_ptr->conn_status < CONNECTION_RESET) |
| 330 | return -ENETRESET; |
| 331 | memcpy(&dest_addr.addr.port_addr, &port_ptr->dest_addr, |
| 332 | sizeof(struct msm_ipc_port_addr)); |
| 333 | dest_addr.addrtype = MSM_IPC_ADDR_ID; |
| 334 | } |
| 335 | |
| 336 | if (total_len > MAX_IPC_PKT_SIZE) |
| 337 | return -EINVAL; |
| 338 | |
| 339 | lock_sock(sk); |
| 340 | timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
| 341 | msg = msm_ipc_router_build_msg(m, total_len); |
| 342 | if (!msg) { |
| 343 | IPC_RTR_ERR("%s: Msg build failure\n", __func__); |
| 344 | ret = -ENOMEM; |
| 345 | goto out_sendmsg; |
| 346 | } |
| 347 | kmemleak_not_leak(msg); |
| 348 | |
| 349 | if (port_ptr->type == CLIENT_PORT) |
| 350 | wait_for_irsc_completion(); |
| 351 | ret = msm_ipc_router_send_to(port_ptr, msg, &dest_addr, timeout); |
| 352 | if (ret != total_len) { |
| 353 | if (ret < 0) { |
| 354 | if (ret != -EAGAIN) |
| 355 | IPC_RTR_ERR("%s: Send_to failure %d\n", |
| 356 | __func__, ret); |
| 357 | msm_ipc_router_free_skb(msg); |
| 358 | } else if (ret >= 0) { |
| 359 | ret = -EFAULT; |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | out_sendmsg: |
| 364 | release_sock(sk); |
| 365 | return ret; |
| 366 | } |
| 367 | |
| 368 | static int msm_ipc_router_recvmsg(struct socket *sock, |
| 369 | struct msghdr *m, size_t buf_len, int flags) |
| 370 | { |
| 371 | struct sock *sk = sock->sk; |
| 372 | struct msm_ipc_port *port_ptr = msm_ipc_sk_port(sk); |
| 373 | struct rr_packet *pkt; |
| 374 | long timeout; |
| 375 | int ret; |
| 376 | |
| 377 | lock_sock(sk); |
| 378 | if (!buf_len) { |
| 379 | if (flags & MSG_PEEK) |
| 380 | ret = msm_ipc_router_get_curr_pkt_size(port_ptr); |
| 381 | else |
| 382 | ret = -EINVAL; |
| 383 | release_sock(sk); |
| 384 | return ret; |
| 385 | } |
| 386 | timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
| 387 | |
| 388 | ret = msm_ipc_router_rx_data_wait(port_ptr, timeout); |
| 389 | if (ret) { |
| 390 | release_sock(sk); |
| 391 | if (ret == -ENOMSG) |
| 392 | m->msg_namelen = 0; |
| 393 | return ret; |
| 394 | } |
| 395 | |
| 396 | ret = msm_ipc_router_read(port_ptr, &pkt, buf_len); |
| 397 | if (ret <= 0 || !pkt) { |
| 398 | release_sock(sk); |
| 399 | return ret; |
| 400 | } |
| 401 | |
| 402 | ret = msm_ipc_router_extract_msg(m, pkt); |
| 403 | release_pkt(pkt); |
| 404 | release_sock(sk); |
| 405 | return ret; |
| 406 | } |
| 407 | |
| 408 | static int msm_ipc_router_ioctl(struct socket *sock, |
| 409 | unsigned int cmd, unsigned long arg) |
| 410 | { |
| 411 | struct sock *sk = sock->sk; |
| 412 | struct msm_ipc_port *port_ptr; |
| 413 | struct server_lookup_args server_arg; |
| 414 | struct msm_ipc_server_info *srv_info = NULL; |
| 415 | unsigned int n; |
| 416 | size_t srv_info_sz = 0; |
| 417 | int ret; |
| 418 | |
| 419 | if (!sk) |
| 420 | return -EINVAL; |
| 421 | |
| 422 | lock_sock(sk); |
| 423 | port_ptr = msm_ipc_sk_port(sock->sk); |
| 424 | if (!port_ptr) { |
| 425 | release_sock(sk); |
| 426 | return -EINVAL; |
| 427 | } |
| 428 | |
| 429 | switch (cmd) { |
| 430 | case IPC_ROUTER_IOCTL_GET_VERSION: |
| 431 | n = IPC_ROUTER_V1; |
| 432 | ret = put_user(n, (unsigned int *)arg); |
| 433 | break; |
| 434 | |
| 435 | case IPC_ROUTER_IOCTL_GET_MTU: |
| 436 | n = (MAX_IPC_PKT_SIZE - IPC_ROUTER_HDR_SIZE); |
| 437 | ret = put_user(n, (unsigned int *)arg); |
| 438 | break; |
| 439 | |
| 440 | case IPC_ROUTER_IOCTL_GET_CURR_PKT_SIZE: |
| 441 | ret = msm_ipc_router_get_curr_pkt_size(port_ptr); |
| 442 | break; |
| 443 | |
| 444 | case IPC_ROUTER_IOCTL_LOOKUP_SERVER: |
| 445 | if (!msm_ipc_sk(sk)->default_node_vote_info) |
| 446 | msm_ipc_sk(sk)->default_node_vote_info = |
| 447 | msm_ipc_load_default_node(); |
| 448 | |
| 449 | ret = copy_from_user(&server_arg, (void *)arg, |
| 450 | sizeof(server_arg)); |
| 451 | if (ret) { |
| 452 | ret = -EFAULT; |
| 453 | break; |
| 454 | } |
| 455 | |
| 456 | if (server_arg.num_entries_in_array < 0) { |
| 457 | ret = -EINVAL; |
| 458 | break; |
| 459 | } |
| 460 | if (server_arg.num_entries_in_array) { |
| 461 | if (server_arg.num_entries_in_array > |
| 462 | (SIZE_MAX / sizeof(*srv_info))) { |
| 463 | IPC_RTR_ERR("%s: Integer Overflow %zu * %d\n", |
| 464 | __func__, sizeof(*srv_info), |
| 465 | server_arg.num_entries_in_array); |
| 466 | ret = -EINVAL; |
| 467 | break; |
| 468 | } |
| 469 | srv_info_sz = server_arg.num_entries_in_array * |
| 470 | sizeof(*srv_info); |
| 471 | srv_info = kmalloc(srv_info_sz, GFP_KERNEL); |
| 472 | if (!srv_info) { |
| 473 | ret = -ENOMEM; |
| 474 | break; |
| 475 | } |
| 476 | } |
| 477 | ret = msm_ipc_router_lookup_server_name |
| 478 | (&server_arg.port_name, srv_info, |
| 479 | server_arg.num_entries_in_array, |
| 480 | server_arg.lookup_mask); |
| 481 | if (ret < 0) { |
| 482 | IPC_RTR_ERR("%s: Server not found\n", __func__); |
| 483 | ret = -ENODEV; |
| 484 | kfree(srv_info); |
| 485 | break; |
| 486 | } |
| 487 | server_arg.num_entries_found = ret; |
| 488 | |
| 489 | ret = copy_to_user((void *)arg, &server_arg, |
| 490 | sizeof(server_arg)); |
| 491 | |
| 492 | n = min(server_arg.num_entries_found, |
| 493 | server_arg.num_entries_in_array); |
| 494 | |
| 495 | if (ret == 0 && n) { |
| 496 | ret = copy_to_user((void *)(arg + sizeof(server_arg)), |
| 497 | srv_info, n * sizeof(*srv_info)); |
| 498 | } |
| 499 | |
| 500 | if (ret) |
| 501 | ret = -EFAULT; |
| 502 | kfree(srv_info); |
| 503 | break; |
| 504 | |
| 505 | case IPC_ROUTER_IOCTL_BIND_CONTROL_PORT: |
| 506 | ret = msm_ipc_router_bind_control_port(port_ptr); |
| 507 | break; |
| 508 | |
| 509 | case IPC_ROUTER_IOCTL_CONFIG_SEC_RULES: |
| 510 | ret = msm_ipc_config_sec_rules((void *)arg); |
| 511 | if (ret != -EPERM) |
| 512 | port_ptr->type = IRSC_PORT; |
| 513 | break; |
| 514 | |
| 515 | default: |
| 516 | ret = -EINVAL; |
| 517 | } |
| 518 | release_sock(sk); |
| 519 | return ret; |
| 520 | } |
| 521 | |
| 522 | static unsigned int msm_ipc_router_poll(struct file *file, struct socket *sock, |
| 523 | poll_table *wait) |
| 524 | { |
| 525 | struct sock *sk = sock->sk; |
| 526 | struct msm_ipc_port *port_ptr; |
| 527 | u32 mask = 0; |
| 528 | |
| 529 | if (!sk) |
| 530 | return -EINVAL; |
| 531 | |
| 532 | port_ptr = msm_ipc_sk_port(sk); |
| 533 | if (!port_ptr) |
| 534 | return -EINVAL; |
| 535 | |
| 536 | poll_wait(file, &port_ptr->port_rx_wait_q, wait); |
| 537 | |
| 538 | if (!list_empty(&port_ptr->port_rx_q)) |
| 539 | mask |= (POLLRDNORM | POLLIN); |
| 540 | |
| 541 | if (port_ptr->conn_status == CONNECTION_RESET) |
| 542 | mask |= (POLLHUP | POLLERR); |
| 543 | |
| 544 | return mask; |
| 545 | } |
| 546 | |
| 547 | static int msm_ipc_router_close(struct socket *sock) |
| 548 | { |
| 549 | struct sock *sk = sock->sk; |
Arun Kumar Neelakantam | 3fc03e0 | 2016-09-21 18:34:01 +0530 | [diff] [blame] | 550 | struct msm_ipc_port *port_ptr; |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 551 | int ret; |
| 552 | |
Arun Kumar Neelakantam | 3fc03e0 | 2016-09-21 18:34:01 +0530 | [diff] [blame] | 553 | if (!sk) |
| 554 | return -EINVAL; |
| 555 | |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 556 | lock_sock(sk); |
Arun Kumar Neelakantam | 3fc03e0 | 2016-09-21 18:34:01 +0530 | [diff] [blame] | 557 | port_ptr = msm_ipc_sk_port(sk); |
| 558 | if (!port_ptr) { |
| 559 | release_sock(sk); |
| 560 | return -EINVAL; |
| 561 | } |
Karthikeyan Ramasubramanian | 6a116d6 | 2016-09-16 16:05:32 -0600 | [diff] [blame] | 562 | ret = msm_ipc_router_close_port(port_ptr); |
| 563 | msm_ipc_unload_default_node(msm_ipc_sk(sk)->default_node_vote_info); |
| 564 | release_sock(sk); |
| 565 | sock_put(sk); |
| 566 | sock->sk = NULL; |
| 567 | |
| 568 | return ret; |
| 569 | } |
| 570 | |
| 571 | /** |
| 572 | * register_ipcrtr_af_init_notifier() - Register for ipc router socket |
| 573 | * address family initialization callback |
| 574 | * @nb: Notifier block which will be notified when address family is |
| 575 | * initialized. |
| 576 | * |
| 577 | * Return: 0 on success, standard error code otherwise. |
| 578 | */ |
| 579 | int register_ipcrtr_af_init_notifier(struct notifier_block *nb) |
| 580 | { |
| 581 | int ret; |
| 582 | |
| 583 | if (!nb) |
| 584 | return -EINVAL; |
| 585 | mutex_lock(&ipcrtr_af_init_lock); |
| 586 | if (sockets_enabled) |
| 587 | nb->notifier_call(nb, IPCRTR_AF_INIT, NULL); |
| 588 | ret = raw_notifier_chain_register(&ipcrtr_af_init_chain, nb); |
| 589 | mutex_unlock(&ipcrtr_af_init_lock); |
| 590 | return ret; |
| 591 | } |
| 592 | EXPORT_SYMBOL(register_ipcrtr_af_init_notifier); |
| 593 | |
| 594 | /** |
| 595 | * unregister_ipcrtr_af_init_notifier() - Unregister for ipc router socket |
| 596 | * address family initialization callback |
| 597 | * @nb: Notifier block which will be notified once address family is |
| 598 | * initialized. |
| 599 | * |
| 600 | * Return: 0 on success, standard error code otherwise. |
| 601 | */ |
| 602 | int unregister_ipcrtr_af_init_notifier(struct notifier_block *nb) |
| 603 | { |
| 604 | int ret; |
| 605 | |
| 606 | if (!nb) |
| 607 | return -EINVAL; |
| 608 | ret = raw_notifier_chain_unregister(&ipcrtr_af_init_chain, nb); |
| 609 | return ret; |
| 610 | } |
| 611 | EXPORT_SYMBOL(unregister_ipcrtr_af_init_notifier); |
| 612 | |
| 613 | static const struct net_proto_family msm_ipc_family_ops = { |
| 614 | .owner = THIS_MODULE, |
| 615 | .family = AF_MSM_IPC, |
| 616 | .create = msm_ipc_router_create |
| 617 | }; |
| 618 | |
| 619 | static const struct proto_ops msm_ipc_proto_ops = { |
| 620 | .family = AF_MSM_IPC, |
| 621 | .owner = THIS_MODULE, |
| 622 | .release = msm_ipc_router_close, |
| 623 | .bind = msm_ipc_router_bind, |
| 624 | .connect = ipc_router_connect, |
| 625 | .socketpair = sock_no_socketpair, |
| 626 | .accept = sock_no_accept, |
| 627 | .getname = sock_no_getname, |
| 628 | .poll = msm_ipc_router_poll, |
| 629 | .ioctl = msm_ipc_router_ioctl, |
| 630 | #ifdef CONFIG_COMPAT |
| 631 | .compat_ioctl = msm_ipc_router_ioctl, |
| 632 | #endif |
| 633 | .listen = sock_no_listen, |
| 634 | .shutdown = sock_no_shutdown, |
| 635 | .setsockopt = sock_no_setsockopt, |
| 636 | .getsockopt = sock_no_getsockopt, |
| 637 | #ifdef CONFIG_COMPAT |
| 638 | .compat_setsockopt = sock_no_setsockopt, |
| 639 | .compat_getsockopt = sock_no_getsockopt, |
| 640 | #endif |
| 641 | .sendmsg = msm_ipc_router_sendmsg, |
| 642 | .recvmsg = msm_ipc_router_recvmsg, |
| 643 | .mmap = sock_no_mmap, |
| 644 | .sendpage = sock_no_sendpage, |
| 645 | }; |
| 646 | |
| 647 | static struct proto msm_ipc_proto = { |
| 648 | .name = "MSM_IPC", |
| 649 | .owner = THIS_MODULE, |
| 650 | .obj_size = sizeof(struct msm_ipc_sock), |
| 651 | }; |
| 652 | |
| 653 | int msm_ipc_router_init_sockets(void) |
| 654 | { |
| 655 | int ret; |
| 656 | |
| 657 | ret = proto_register(&msm_ipc_proto, 1); |
| 658 | if (ret) { |
| 659 | IPC_RTR_ERR("%s: Failed to register MSM_IPC protocol type\n", |
| 660 | __func__); |
| 661 | goto out_init_sockets; |
| 662 | } |
| 663 | |
| 664 | ret = sock_register(&msm_ipc_family_ops); |
| 665 | if (ret) { |
| 666 | IPC_RTR_ERR("%s: Failed to register MSM_IPC socket type\n", |
| 667 | __func__); |
| 668 | proto_unregister(&msm_ipc_proto); |
| 669 | goto out_init_sockets; |
| 670 | } |
| 671 | |
| 672 | mutex_lock(&ipcrtr_af_init_lock); |
| 673 | sockets_enabled = 1; |
| 674 | raw_notifier_call_chain(&ipcrtr_af_init_chain, |
| 675 | IPCRTR_AF_INIT, NULL); |
| 676 | mutex_unlock(&ipcrtr_af_init_lock); |
| 677 | out_init_sockets: |
| 678 | return ret; |
| 679 | } |
| 680 | |
| 681 | void msm_ipc_router_exit_sockets(void) |
| 682 | { |
| 683 | if (!sockets_enabled) |
| 684 | return; |
| 685 | |
| 686 | sock_unregister(msm_ipc_family_ops.family); |
| 687 | proto_unregister(&msm_ipc_proto); |
| 688 | mutex_lock(&ipcrtr_af_init_lock); |
| 689 | sockets_enabled = 0; |
| 690 | raw_notifier_call_chain(&ipcrtr_af_init_chain, |
| 691 | IPCRTR_AF_DEINIT, NULL); |
| 692 | mutex_unlock(&ipcrtr_af_init_lock); |
| 693 | } |