David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1 | /* AF_RXRPC implementation |
| 2 | * |
| 3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 13 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 14 | #include <linux/module.h> |
YOSHIFUJI Hideaki / 吉藤英明 | ce6654c | 2013-01-09 07:20:01 +0000 | [diff] [blame] | 15 | #include <linux/kernel.h> |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 16 | #include <linux/net.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 17 | #include <linux/slab.h> |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 18 | #include <linux/skbuff.h> |
David Howells | 5f2d9c4 | 2016-09-02 22:39:45 +0100 | [diff] [blame] | 19 | #include <linux/random.h> |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 20 | #include <linux/poll.h> |
| 21 | #include <linux/proc_fs.h> |
David Howells | 76181c1 | 2007-10-16 23:29:46 -0700 | [diff] [blame] | 22 | #include <linux/key-type.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 23 | #include <net/net_namespace.h> |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 24 | #include <net/sock.h> |
| 25 | #include <net/af_rxrpc.h> |
David Howells | df844fd | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 26 | #define CREATE_TRACE_POINTS |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 27 | #include "ar-internal.h" |
| 28 | |
| 29 | MODULE_DESCRIPTION("RxRPC network protocol"); |
| 30 | MODULE_AUTHOR("Red Hat, Inc."); |
| 31 | MODULE_LICENSE("GPL"); |
| 32 | MODULE_ALIAS_NETPROTO(PF_RXRPC); |
| 33 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 34 | unsigned int rxrpc_debug; // = RXRPC_DEBUG_KPROTO; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 35 | module_param_named(debug, rxrpc_debug, uint, S_IWUSR | S_IRUGO); |
Paul Bolle | 424b00e | 2008-04-16 11:08:22 +0100 | [diff] [blame] | 36 | MODULE_PARM_DESC(debug, "RxRPC debugging mask"); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 37 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 38 | static struct proto rxrpc_proto; |
| 39 | static const struct proto_ops rxrpc_rpc_ops; |
| 40 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 41 | /* current debugging ID */ |
| 42 | atomic_t rxrpc_debug_id; |
| 43 | |
| 44 | /* count of skbs currently in use */ |
David Howells | 71f3ca4 | 2016-09-17 10:49:14 +0100 | [diff] [blame] | 45 | atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 46 | |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 47 | struct workqueue_struct *rxrpc_workqueue; |
| 48 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 49 | static void rxrpc_sock_destructor(struct sock *); |
| 50 | |
| 51 | /* |
| 52 | * see if an RxRPC socket is currently writable |
| 53 | */ |
| 54 | static inline int rxrpc_writable(struct sock *sk) |
| 55 | { |
Reshetova, Elena | 14afee4 | 2017-06-30 13:08:00 +0300 | [diff] [blame] | 56 | return refcount_read(&sk->sk_wmem_alloc) < (size_t) sk->sk_sndbuf; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | /* |
| 60 | * wait for write bufferage to become available |
| 61 | */ |
| 62 | static void rxrpc_write_space(struct sock *sk) |
| 63 | { |
| 64 | _enter("%p", sk); |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 65 | rcu_read_lock(); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 66 | if (rxrpc_writable(sk)) { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 67 | struct socket_wq *wq = rcu_dereference(sk->sk_wq); |
| 68 | |
Herbert Xu | 1ce0bf5 | 2015-11-26 13:55:39 +0800 | [diff] [blame] | 69 | if (skwq_has_sleeper(wq)) |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 70 | wake_up_interruptible(&wq->wait); |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 71 | sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 72 | } |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 73 | rcu_read_unlock(); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | /* |
| 77 | * validate an RxRPC address |
| 78 | */ |
| 79 | static int rxrpc_validate_address(struct rxrpc_sock *rx, |
| 80 | struct sockaddr_rxrpc *srx, |
| 81 | int len) |
| 82 | { |
David Howells | dad8aff | 2016-03-09 23:22:56 +0000 | [diff] [blame] | 83 | unsigned int tail; |
David Howells | ab802ee | 2016-03-04 15:59:49 +0000 | [diff] [blame] | 84 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 85 | if (len < sizeof(struct sockaddr_rxrpc)) |
| 86 | return -EINVAL; |
| 87 | |
| 88 | if (srx->srx_family != AF_RXRPC) |
| 89 | return -EAFNOSUPPORT; |
| 90 | |
| 91 | if (srx->transport_type != SOCK_DGRAM) |
| 92 | return -ESOCKTNOSUPPORT; |
| 93 | |
| 94 | len -= offsetof(struct sockaddr_rxrpc, transport); |
| 95 | if (srx->transport_len < sizeof(sa_family_t) || |
| 96 | srx->transport_len > len) |
| 97 | return -EINVAL; |
| 98 | |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 99 | if (srx->transport.family != rx->family) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 100 | return -EAFNOSUPPORT; |
| 101 | |
| 102 | switch (srx->transport.family) { |
| 103 | case AF_INET: |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 104 | if (srx->transport_len < sizeof(struct sockaddr_in)) |
| 105 | return -EINVAL; |
David Howells | ab802ee | 2016-03-04 15:59:49 +0000 | [diff] [blame] | 106 | tail = offsetof(struct sockaddr_rxrpc, transport.sin.__pad); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 107 | break; |
| 108 | |
David Howells | d191274 | 2016-09-17 07:26:01 +0100 | [diff] [blame] | 109 | #ifdef CONFIG_AF_RXRPC_IPV6 |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 110 | case AF_INET6: |
David Howells | 75b54cb | 2016-09-13 08:49:05 +0100 | [diff] [blame] | 111 | if (srx->transport_len < sizeof(struct sockaddr_in6)) |
| 112 | return -EINVAL; |
| 113 | tail = offsetof(struct sockaddr_rxrpc, transport) + |
| 114 | sizeof(struct sockaddr_in6); |
| 115 | break; |
David Howells | d191274 | 2016-09-17 07:26:01 +0100 | [diff] [blame] | 116 | #endif |
David Howells | 75b54cb | 2016-09-13 08:49:05 +0100 | [diff] [blame] | 117 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 118 | default: |
| 119 | return -EAFNOSUPPORT; |
| 120 | } |
| 121 | |
David Howells | ab802ee | 2016-03-04 15:59:49 +0000 | [diff] [blame] | 122 | if (tail < len) |
| 123 | memset((void *)srx + tail, 0, len - tail); |
David Howells | 75b54cb | 2016-09-13 08:49:05 +0100 | [diff] [blame] | 124 | _debug("INET: %pISp", &srx->transport); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | /* |
| 129 | * bind a local address to an RxRPC socket |
| 130 | */ |
| 131 | static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len) |
| 132 | { |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 133 | struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)saddr; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 134 | struct rxrpc_local *local; |
David Howells | 68d6d1a | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 135 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
David Howells | 1e9e5c9 | 2016-09-29 22:37:15 +0100 | [diff] [blame] | 136 | u16 service_id = srx->srx_service; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 137 | int ret; |
| 138 | |
| 139 | _enter("%p,%p,%d", rx, saddr, len); |
| 140 | |
| 141 | ret = rxrpc_validate_address(rx, srx, len); |
| 142 | if (ret < 0) |
| 143 | goto error; |
| 144 | |
| 145 | lock_sock(&rx->sk); |
| 146 | |
David Howells | 28036f4 | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 147 | switch (rx->sk.sk_state) { |
| 148 | case RXRPC_UNBOUND: |
| 149 | rx->srx = *srx; |
| 150 | local = rxrpc_lookup_local(sock_net(&rx->sk), &rx->srx); |
| 151 | if (IS_ERR(local)) { |
| 152 | ret = PTR_ERR(local); |
| 153 | goto error_unlock; |
| 154 | } |
| 155 | |
| 156 | if (service_id) { |
| 157 | write_lock(&local->services_lock); |
| 158 | if (rcu_access_pointer(local->service)) |
| 159 | goto service_in_use; |
| 160 | rx->local = local; |
| 161 | rcu_assign_pointer(local->service, rx); |
| 162 | write_unlock(&local->services_lock); |
| 163 | |
| 164 | rx->sk.sk_state = RXRPC_SERVER_BOUND; |
| 165 | } else { |
| 166 | rx->local = local; |
| 167 | rx->sk.sk_state = RXRPC_CLIENT_BOUND; |
| 168 | } |
| 169 | break; |
| 170 | |
| 171 | case RXRPC_SERVER_BOUND: |
| 172 | ret = -EINVAL; |
| 173 | if (service_id == 0) |
| 174 | goto error_unlock; |
| 175 | ret = -EADDRINUSE; |
| 176 | if (service_id == rx->srx.srx_service) |
| 177 | goto error_unlock; |
| 178 | ret = -EINVAL; |
| 179 | srx->srx_service = rx->srx.srx_service; |
| 180 | if (memcmp(srx, &rx->srx, sizeof(*srx)) != 0) |
| 181 | goto error_unlock; |
| 182 | rx->second_service = service_id; |
| 183 | rx->sk.sk_state = RXRPC_SERVER_BOUND2; |
| 184 | break; |
| 185 | |
| 186 | default: |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 187 | ret = -EINVAL; |
| 188 | goto error_unlock; |
| 189 | } |
| 190 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 191 | release_sock(&rx->sk); |
| 192 | _leave(" = 0"); |
| 193 | return 0; |
| 194 | |
| 195 | service_in_use: |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 196 | write_unlock(&local->services_lock); |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 197 | rxrpc_put_local(local); |
| 198 | ret = -EADDRINUSE; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 199 | error_unlock: |
| 200 | release_sock(&rx->sk); |
| 201 | error: |
| 202 | _leave(" = %d", ret); |
| 203 | return ret; |
| 204 | } |
| 205 | |
| 206 | /* |
| 207 | * set the number of pending calls permitted on a listening socket |
| 208 | */ |
| 209 | static int rxrpc_listen(struct socket *sock, int backlog) |
| 210 | { |
| 211 | struct sock *sk = sock->sk; |
| 212 | struct rxrpc_sock *rx = rxrpc_sk(sk); |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 213 | unsigned int max, old; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 214 | int ret; |
| 215 | |
| 216 | _enter("%p,%d", rx, backlog); |
| 217 | |
| 218 | lock_sock(&rx->sk); |
| 219 | |
| 220 | switch (rx->sk.sk_state) { |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 221 | case RXRPC_UNBOUND: |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 222 | ret = -EADDRNOTAVAIL; |
| 223 | break; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 224 | case RXRPC_SERVER_BOUND: |
David Howells | 28036f4 | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 225 | case RXRPC_SERVER_BOUND2: |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 226 | ASSERT(rx->local != NULL); |
David Howells | 0e119b4 | 2016-06-10 22:30:37 +0100 | [diff] [blame] | 227 | max = READ_ONCE(rxrpc_max_backlog); |
| 228 | ret = -EINVAL; |
| 229 | if (backlog == INT_MAX) |
| 230 | backlog = max; |
| 231 | else if (backlog < 0 || backlog > max) |
| 232 | break; |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 233 | old = sk->sk_max_ack_backlog; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 234 | sk->sk_max_ack_backlog = backlog; |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 235 | ret = rxrpc_service_prealloc(rx, GFP_KERNEL); |
| 236 | if (ret == 0) |
| 237 | rx->sk.sk_state = RXRPC_SERVER_LISTENING; |
| 238 | else |
| 239 | sk->sk_max_ack_backlog = old; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 240 | break; |
David Howells | 210f035 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 241 | case RXRPC_SERVER_LISTENING: |
| 242 | if (backlog == 0) { |
| 243 | rx->sk.sk_state = RXRPC_SERVER_LISTEN_DISABLED; |
| 244 | sk->sk_max_ack_backlog = 0; |
| 245 | rxrpc_discard_prealloc(rx); |
| 246 | ret = 0; |
| 247 | break; |
| 248 | } |
David Howells | 0e119b4 | 2016-06-10 22:30:37 +0100 | [diff] [blame] | 249 | default: |
| 250 | ret = -EBUSY; |
| 251 | break; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | release_sock(&rx->sk); |
| 255 | _leave(" = %d", ret); |
| 256 | return ret; |
| 257 | } |
| 258 | |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 259 | /** |
| 260 | * rxrpc_kernel_begin_call - Allow a kernel service to begin a call |
| 261 | * @sock: The socket on which to make the call |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 262 | * @srx: The address of the peer to contact |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 263 | * @key: The security context to use (defaults to socket setting) |
| 264 | * @user_call_ID: The ID to use |
David Howells | e754eba | 2017-06-07 12:40:03 +0100 | [diff] [blame] | 265 | * @tx_total_len: Total length of data to transmit during the call (or -1) |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 266 | * @gfp: The allocation constraints |
| 267 | * @notify_rx: Where to send notifications instead of socket queue |
David Howells | a68f4a2 | 2017-10-18 11:36:39 +0100 | [diff] [blame] | 268 | * @upgrade: Request service upgrade for call |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 269 | * |
| 270 | * Allow a kernel service to begin a call on the nominated socket. This just |
| 271 | * sets up all the internal tracking structures and allocates connection and |
| 272 | * call IDs as appropriate. The call to be used is returned. |
| 273 | * |
| 274 | * The default socket destination address and security may be overridden by |
| 275 | * supplying @srx and @key. |
| 276 | */ |
| 277 | struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock, |
| 278 | struct sockaddr_rxrpc *srx, |
| 279 | struct key *key, |
| 280 | unsigned long user_call_ID, |
David Howells | e754eba | 2017-06-07 12:40:03 +0100 | [diff] [blame] | 281 | s64 tx_total_len, |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 282 | gfp_t gfp, |
David Howells | a68f4a2 | 2017-10-18 11:36:39 +0100 | [diff] [blame] | 283 | rxrpc_notify_rx_t notify_rx, |
| 284 | bool upgrade) |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 285 | { |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 286 | struct rxrpc_conn_parameters cp; |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 287 | struct rxrpc_call *call; |
| 288 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
David Howells | f4552c2 | 2016-06-17 11:00:48 +0100 | [diff] [blame] | 289 | int ret; |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 290 | |
| 291 | _enter(",,%x,%lx", key_serial(key), user_call_ID); |
| 292 | |
David Howells | f4552c2 | 2016-06-17 11:00:48 +0100 | [diff] [blame] | 293 | ret = rxrpc_validate_address(rx, srx, sizeof(*srx)); |
| 294 | if (ret < 0) |
| 295 | return ERR_PTR(ret); |
| 296 | |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 297 | lock_sock(&rx->sk); |
| 298 | |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 299 | if (!key) |
| 300 | key = rx->key; |
| 301 | if (key && !key->payload.data[0]) |
| 302 | key = NULL; /* a no-security key */ |
| 303 | |
| 304 | memset(&cp, 0, sizeof(cp)); |
| 305 | cp.local = rx->local; |
| 306 | cp.key = key; |
| 307 | cp.security_level = 0; |
| 308 | cp.exclusive = false; |
David Howells | a68f4a2 | 2017-10-18 11:36:39 +0100 | [diff] [blame] | 309 | cp.upgrade = upgrade; |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 310 | cp.service_id = srx->srx_service; |
David Howells | e754eba | 2017-06-07 12:40:03 +0100 | [diff] [blame] | 311 | call = rxrpc_new_client_call(rx, &cp, srx, user_call_ID, tx_total_len, |
| 312 | gfp); |
David Howells | 540b1c4 | 2017-02-27 15:43:06 +0000 | [diff] [blame] | 313 | /* The socket has been unlocked. */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 314 | if (!IS_ERR(call)) |
| 315 | call->notify_rx = notify_rx; |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 316 | |
David Howells | 540b1c4 | 2017-02-27 15:43:06 +0000 | [diff] [blame] | 317 | mutex_unlock(&call->user_mutex); |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 318 | _leave(" = %p", call); |
| 319 | return call; |
| 320 | } |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 321 | EXPORT_SYMBOL(rxrpc_kernel_begin_call); |
| 322 | |
| 323 | /** |
| 324 | * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using |
David Howells | 4de48af | 2016-08-30 12:00:48 +0100 | [diff] [blame] | 325 | * @sock: The socket the call is on |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 326 | * @call: The call to end |
| 327 | * |
| 328 | * Allow a kernel service to end a call it was using. The call must be |
| 329 | * complete before this is called (the call should be aborted if necessary). |
| 330 | */ |
David Howells | 4de48af | 2016-08-30 12:00:48 +0100 | [diff] [blame] | 331 | void rxrpc_kernel_end_call(struct socket *sock, struct rxrpc_call *call) |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 332 | { |
| 333 | _enter("%d{%d}", call->debug_id, atomic_read(&call->usage)); |
David Howells | 540b1c4 | 2017-02-27 15:43:06 +0000 | [diff] [blame] | 334 | |
| 335 | mutex_lock(&call->user_mutex); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 336 | rxrpc_release_call(rxrpc_sk(sock->sk), call); |
David Howells | 540b1c4 | 2017-02-27 15:43:06 +0000 | [diff] [blame] | 337 | mutex_unlock(&call->user_mutex); |
David Howells | cbd0089 | 2016-09-13 09:12:34 +0100 | [diff] [blame] | 338 | rxrpc_put_call(call, rxrpc_call_put_kernel); |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 339 | } |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 340 | EXPORT_SYMBOL(rxrpc_kernel_end_call); |
| 341 | |
| 342 | /** |
David Howells | f4d15fb | 2017-10-18 11:07:31 +0100 | [diff] [blame^] | 343 | * rxrpc_kernel_check_life - Check to see whether a call is still alive |
| 344 | * @sock: The socket the call is on |
| 345 | * @call: The call to check |
| 346 | * |
| 347 | * Allow a kernel service to find out whether a call is still alive - ie. we're |
| 348 | * getting ACKs from the server. Returns a number representing the life state |
| 349 | * which can be compared to that returned by a previous call. |
| 350 | * |
| 351 | * If this is a client call, ping ACKs will be sent to the server to find out |
| 352 | * whether it's still responsive and whether the call is still alive on the |
| 353 | * server. |
| 354 | */ |
| 355 | u32 rxrpc_kernel_check_life(struct socket *sock, struct rxrpc_call *call) |
| 356 | { |
| 357 | return call->acks_latest; |
| 358 | } |
| 359 | EXPORT_SYMBOL(rxrpc_kernel_check_life); |
| 360 | |
| 361 | /** |
David Howells | c038a58 | 2017-08-29 10:19:01 +0100 | [diff] [blame] | 362 | * rxrpc_kernel_check_call - Check a call's state |
| 363 | * @sock: The socket the call is on |
| 364 | * @call: The call to check |
| 365 | * @_compl: Where to store the completion state |
| 366 | * @_abort_code: Where to store any abort code |
| 367 | * |
| 368 | * Allow a kernel service to query the state of a call and find out the manner |
| 369 | * of its termination if it has completed. Returns -EINPROGRESS if the call is |
| 370 | * still going, 0 if the call finished successfully, -ECONNABORTED if the call |
| 371 | * was aborted and an appropriate error if the call failed in some other way. |
| 372 | */ |
| 373 | int rxrpc_kernel_check_call(struct socket *sock, struct rxrpc_call *call, |
| 374 | enum rxrpc_call_completion *_compl, u32 *_abort_code) |
| 375 | { |
| 376 | if (call->state != RXRPC_CALL_COMPLETE) |
| 377 | return -EINPROGRESS; |
| 378 | smp_rmb(); |
| 379 | *_compl = call->completion; |
| 380 | *_abort_code = call->abort_code; |
| 381 | return call->error; |
| 382 | } |
| 383 | EXPORT_SYMBOL(rxrpc_kernel_check_call); |
| 384 | |
| 385 | /** |
| 386 | * rxrpc_kernel_retry_call - Allow a kernel service to retry a call |
| 387 | * @sock: The socket the call is on |
| 388 | * @call: The call to retry |
| 389 | * @srx: The address of the peer to contact |
| 390 | * @key: The security context to use (defaults to socket setting) |
| 391 | * |
| 392 | * Allow a kernel service to try resending a client call that failed due to a |
| 393 | * network error to a new address. The Tx queue is maintained intact, thereby |
| 394 | * relieving the need to re-encrypt any request data that has already been |
| 395 | * buffered. |
| 396 | */ |
| 397 | int rxrpc_kernel_retry_call(struct socket *sock, struct rxrpc_call *call, |
| 398 | struct sockaddr_rxrpc *srx, struct key *key) |
| 399 | { |
| 400 | struct rxrpc_conn_parameters cp; |
| 401 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
| 402 | int ret; |
| 403 | |
| 404 | _enter("%d{%d}", call->debug_id, atomic_read(&call->usage)); |
| 405 | |
| 406 | if (!key) |
| 407 | key = rx->key; |
| 408 | if (key && !key->payload.data[0]) |
| 409 | key = NULL; /* a no-security key */ |
| 410 | |
| 411 | memset(&cp, 0, sizeof(cp)); |
| 412 | cp.local = rx->local; |
| 413 | cp.key = key; |
| 414 | cp.security_level = 0; |
| 415 | cp.exclusive = false; |
| 416 | cp.service_id = srx->srx_service; |
| 417 | |
| 418 | mutex_lock(&call->user_mutex); |
| 419 | |
| 420 | ret = rxrpc_prepare_call_for_retry(rx, call); |
| 421 | if (ret == 0) |
| 422 | ret = rxrpc_retry_client_call(rx, call, &cp, srx, GFP_KERNEL); |
| 423 | |
| 424 | mutex_unlock(&call->user_mutex); |
| 425 | _leave(" = %d", ret); |
| 426 | return ret; |
| 427 | } |
| 428 | EXPORT_SYMBOL(rxrpc_kernel_retry_call); |
| 429 | |
| 430 | /** |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 431 | * rxrpc_kernel_new_call_notification - Get notifications of new calls |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 432 | * @sock: The socket to intercept received messages on |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 433 | * @notify_new_call: Function to be called when new calls appear |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 434 | * @discard_new_call: Function to discard preallocated calls |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 435 | * |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 436 | * Allow a kernel service to be given notifications about new calls. |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 437 | */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 438 | void rxrpc_kernel_new_call_notification( |
| 439 | struct socket *sock, |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 440 | rxrpc_notify_new_call_t notify_new_call, |
| 441 | rxrpc_discard_new_call_t discard_new_call) |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 442 | { |
| 443 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
| 444 | |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 445 | rx->notify_new_call = notify_new_call; |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 446 | rx->discard_new_call = discard_new_call; |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 447 | } |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 448 | EXPORT_SYMBOL(rxrpc_kernel_new_call_notification); |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 449 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 450 | /* |
| 451 | * connect an RxRPC socket |
| 452 | * - this just targets it at a specific destination; no actual connection |
| 453 | * negotiation takes place |
| 454 | */ |
| 455 | static int rxrpc_connect(struct socket *sock, struct sockaddr *addr, |
| 456 | int addr_len, int flags) |
| 457 | { |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 458 | struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr; |
| 459 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 460 | int ret; |
| 461 | |
| 462 | _enter("%p,%p,%d,%d", rx, addr, addr_len, flags); |
| 463 | |
| 464 | ret = rxrpc_validate_address(rx, srx, addr_len); |
| 465 | if (ret < 0) { |
| 466 | _leave(" = %d [bad addr]", ret); |
| 467 | return ret; |
| 468 | } |
| 469 | |
| 470 | lock_sock(&rx->sk); |
| 471 | |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 472 | ret = -EISCONN; |
| 473 | if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) |
| 474 | goto error; |
| 475 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 476 | switch (rx->sk.sk_state) { |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 477 | case RXRPC_UNBOUND: |
| 478 | rx->sk.sk_state = RXRPC_CLIENT_UNBOUND; |
| 479 | case RXRPC_CLIENT_UNBOUND: |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 480 | case RXRPC_CLIENT_BOUND: |
| 481 | break; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 482 | default: |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 483 | ret = -EBUSY; |
| 484 | goto error; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 485 | } |
| 486 | |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 487 | rx->connect_srx = *srx; |
| 488 | set_bit(RXRPC_SOCK_CONNECTED, &rx->flags); |
| 489 | ret = 0; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 490 | |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 491 | error: |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 492 | release_sock(&rx->sk); |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 493 | return ret; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 494 | } |
| 495 | |
| 496 | /* |
| 497 | * send a message through an RxRPC socket |
| 498 | * - in a client this does a number of things: |
| 499 | * - finds/sets up a connection for the security specified (if any) |
| 500 | * - initiates a call (ID in control data) |
| 501 | * - ends the request phase of a call (if MSG_MORE is not set) |
| 502 | * - sends a call data packet |
| 503 | * - may send an abort (abort code in control data) |
| 504 | */ |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 505 | static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 506 | { |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 507 | struct rxrpc_local *local; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 508 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
| 509 | int ret; |
| 510 | |
| 511 | _enter(",{%d},,%zu", rx->sk.sk_state, len); |
| 512 | |
| 513 | if (m->msg_flags & MSG_OOB) |
| 514 | return -EOPNOTSUPP; |
| 515 | |
| 516 | if (m->msg_name) { |
| 517 | ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen); |
| 518 | if (ret < 0) { |
| 519 | _leave(" = %d [bad addr]", ret); |
| 520 | return ret; |
| 521 | } |
| 522 | } |
| 523 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 524 | lock_sock(&rx->sk); |
| 525 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 526 | switch (rx->sk.sk_state) { |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 527 | case RXRPC_UNBOUND: |
David Howells | cd5892c | 2016-09-13 08:49:05 +0100 | [diff] [blame] | 528 | rx->srx.srx_family = AF_RXRPC; |
| 529 | rx->srx.srx_service = 0; |
| 530 | rx->srx.transport_type = SOCK_DGRAM; |
| 531 | rx->srx.transport.family = rx->family; |
| 532 | switch (rx->family) { |
| 533 | case AF_INET: |
| 534 | rx->srx.transport_len = sizeof(struct sockaddr_in); |
| 535 | break; |
David Howells | d191274 | 2016-09-17 07:26:01 +0100 | [diff] [blame] | 536 | #ifdef CONFIG_AF_RXRPC_IPV6 |
David Howells | 75b54cb | 2016-09-13 08:49:05 +0100 | [diff] [blame] | 537 | case AF_INET6: |
| 538 | rx->srx.transport_len = sizeof(struct sockaddr_in6); |
| 539 | break; |
David Howells | d191274 | 2016-09-17 07:26:01 +0100 | [diff] [blame] | 540 | #endif |
David Howells | cd5892c | 2016-09-13 08:49:05 +0100 | [diff] [blame] | 541 | default: |
| 542 | ret = -EAFNOSUPPORT; |
| 543 | goto error_unlock; |
| 544 | } |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 545 | local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx); |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 546 | if (IS_ERR(local)) { |
| 547 | ret = PTR_ERR(local); |
| 548 | goto error_unlock; |
| 549 | } |
| 550 | |
| 551 | rx->local = local; |
| 552 | rx->sk.sk_state = RXRPC_CLIENT_UNBOUND; |
| 553 | /* Fall through */ |
| 554 | |
| 555 | case RXRPC_CLIENT_UNBOUND: |
| 556 | case RXRPC_CLIENT_BOUND: |
| 557 | if (!m->msg_name && |
| 558 | test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) { |
| 559 | m->msg_name = &rx->connect_srx; |
| 560 | m->msg_namelen = sizeof(rx->connect_srx); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 561 | } |
| 562 | case RXRPC_SERVER_BOUND: |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 563 | case RXRPC_SERVER_LISTENING: |
| 564 | ret = rxrpc_do_sendmsg(rx, m, len); |
David Howells | 540b1c4 | 2017-02-27 15:43:06 +0000 | [diff] [blame] | 565 | /* The socket has been unlocked */ |
| 566 | goto out; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 567 | default: |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 568 | ret = -EINVAL; |
David Howells | 540b1c4 | 2017-02-27 15:43:06 +0000 | [diff] [blame] | 569 | goto error_unlock; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 570 | } |
| 571 | |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 572 | error_unlock: |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 573 | release_sock(&rx->sk); |
David Howells | 540b1c4 | 2017-02-27 15:43:06 +0000 | [diff] [blame] | 574 | out: |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 575 | _leave(" = %d", ret); |
| 576 | return ret; |
| 577 | } |
| 578 | |
| 579 | /* |
| 580 | * set RxRPC socket options |
| 581 | */ |
| 582 | static int rxrpc_setsockopt(struct socket *sock, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 583 | char __user *optval, unsigned int optlen) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 584 | { |
| 585 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 586 | unsigned int min_sec_level; |
David Howells | 4722974 | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 587 | u16 service_upgrade[2]; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 588 | int ret; |
| 589 | |
| 590 | _enter(",%d,%d,,%d", level, optname, optlen); |
| 591 | |
| 592 | lock_sock(&rx->sk); |
| 593 | ret = -EOPNOTSUPP; |
| 594 | |
| 595 | if (level == SOL_RXRPC) { |
| 596 | switch (optname) { |
| 597 | case RXRPC_EXCLUSIVE_CONNECTION: |
| 598 | ret = -EINVAL; |
| 599 | if (optlen != 0) |
| 600 | goto error; |
| 601 | ret = -EISCONN; |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 602 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 603 | goto error; |
David Howells | cc8feb8 | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 604 | rx->exclusive = true; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 605 | goto success; |
| 606 | |
| 607 | case RXRPC_SECURITY_KEY: |
| 608 | ret = -EINVAL; |
| 609 | if (rx->key) |
| 610 | goto error; |
| 611 | ret = -EISCONN; |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 612 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 613 | goto error; |
| 614 | ret = rxrpc_request_key(rx, optval, optlen); |
| 615 | goto error; |
| 616 | |
| 617 | case RXRPC_SECURITY_KEYRING: |
| 618 | ret = -EINVAL; |
| 619 | if (rx->key) |
| 620 | goto error; |
| 621 | ret = -EISCONN; |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 622 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 623 | goto error; |
| 624 | ret = rxrpc_server_keyring(rx, optval, optlen); |
| 625 | goto error; |
| 626 | |
| 627 | case RXRPC_MIN_SECURITY_LEVEL: |
| 628 | ret = -EINVAL; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 629 | if (optlen != sizeof(unsigned int)) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 630 | goto error; |
| 631 | ret = -EISCONN; |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 632 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 633 | goto error; |
| 634 | ret = get_user(min_sec_level, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 635 | (unsigned int __user *) optval); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 636 | if (ret < 0) |
| 637 | goto error; |
| 638 | ret = -EINVAL; |
| 639 | if (min_sec_level > RXRPC_SECURITY_MAX) |
| 640 | goto error; |
| 641 | rx->min_sec_level = min_sec_level; |
| 642 | goto success; |
| 643 | |
David Howells | 4722974 | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 644 | case RXRPC_UPGRADEABLE_SERVICE: |
| 645 | ret = -EINVAL; |
| 646 | if (optlen != sizeof(service_upgrade) || |
| 647 | rx->service_upgrade.from != 0) |
| 648 | goto error; |
| 649 | ret = -EISCONN; |
| 650 | if (rx->sk.sk_state != RXRPC_SERVER_BOUND2) |
| 651 | goto error; |
| 652 | ret = -EFAULT; |
| 653 | if (copy_from_user(service_upgrade, optval, |
| 654 | sizeof(service_upgrade)) != 0) |
| 655 | goto error; |
| 656 | ret = -EINVAL; |
| 657 | if ((service_upgrade[0] != rx->srx.srx_service || |
| 658 | service_upgrade[1] != rx->second_service) && |
| 659 | (service_upgrade[0] != rx->second_service || |
| 660 | service_upgrade[1] != rx->srx.srx_service)) |
| 661 | goto error; |
| 662 | rx->service_upgrade.from = service_upgrade[0]; |
| 663 | rx->service_upgrade.to = service_upgrade[1]; |
| 664 | goto success; |
| 665 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 666 | default: |
| 667 | break; |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | success: |
| 672 | ret = 0; |
| 673 | error: |
| 674 | release_sock(&rx->sk); |
| 675 | return ret; |
| 676 | } |
| 677 | |
| 678 | /* |
David Howells | 515559c | 2017-06-07 16:27:15 +0100 | [diff] [blame] | 679 | * Get socket options. |
| 680 | */ |
| 681 | static int rxrpc_getsockopt(struct socket *sock, int level, int optname, |
| 682 | char __user *optval, int __user *_optlen) |
| 683 | { |
| 684 | int optlen; |
David Howells | 3ec0efd | 2017-08-29 10:18:50 +0100 | [diff] [blame] | 685 | |
David Howells | 515559c | 2017-06-07 16:27:15 +0100 | [diff] [blame] | 686 | if (level != SOL_RXRPC) |
| 687 | return -EOPNOTSUPP; |
| 688 | |
| 689 | if (get_user(optlen, _optlen)) |
| 690 | return -EFAULT; |
David Howells | 3ec0efd | 2017-08-29 10:18:50 +0100 | [diff] [blame] | 691 | |
David Howells | 515559c | 2017-06-07 16:27:15 +0100 | [diff] [blame] | 692 | switch (optname) { |
| 693 | case RXRPC_SUPPORTED_CMSG: |
| 694 | if (optlen < sizeof(int)) |
| 695 | return -ETOOSMALL; |
| 696 | if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) || |
| 697 | put_user(sizeof(int), _optlen)) |
| 698 | return -EFAULT; |
| 699 | return 0; |
David Howells | 3ec0efd | 2017-08-29 10:18:50 +0100 | [diff] [blame] | 700 | |
David Howells | 515559c | 2017-06-07 16:27:15 +0100 | [diff] [blame] | 701 | default: |
| 702 | return -EOPNOTSUPP; |
| 703 | } |
| 704 | } |
| 705 | |
| 706 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 707 | * permit an RxRPC socket to be polled |
| 708 | */ |
| 709 | static unsigned int rxrpc_poll(struct file *file, struct socket *sock, |
| 710 | poll_table *wait) |
| 711 | { |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 712 | struct sock *sk = sock->sk; |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 713 | struct rxrpc_sock *rx = rxrpc_sk(sk); |
| 714 | unsigned int mask; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 715 | |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 716 | sock_poll_wait(file, sk_sleep(sk), wait); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 717 | mask = 0; |
| 718 | |
| 719 | /* the socket is readable if there are any messages waiting on the Rx |
| 720 | * queue */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 721 | if (!list_empty(&rx->recvmsg_q)) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 722 | mask |= POLLIN | POLLRDNORM; |
| 723 | |
| 724 | /* the socket is writable if there is space to add new data to the |
| 725 | * socket; there is no guarantee that any particular call in progress |
| 726 | * on the socket may have space in the Tx ACK window */ |
| 727 | if (rxrpc_writable(sk)) |
| 728 | mask |= POLLOUT | POLLWRNORM; |
| 729 | |
| 730 | return mask; |
| 731 | } |
| 732 | |
| 733 | /* |
| 734 | * create an RxRPC socket |
| 735 | */ |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 736 | static int rxrpc_create(struct net *net, struct socket *sock, int protocol, |
| 737 | int kern) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 738 | { |
| 739 | struct rxrpc_sock *rx; |
| 740 | struct sock *sk; |
| 741 | |
| 742 | _enter("%p,%d", sock, protocol); |
| 743 | |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 744 | /* we support transport protocol UDP/UDP6 only */ |
David Howells | d191274 | 2016-09-17 07:26:01 +0100 | [diff] [blame] | 745 | if (protocol != PF_INET && |
| 746 | IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 747 | return -EPROTONOSUPPORT; |
| 748 | |
| 749 | if (sock->type != SOCK_DGRAM) |
| 750 | return -ESOCKTNOSUPPORT; |
| 751 | |
| 752 | sock->ops = &rxrpc_rpc_ops; |
| 753 | sock->state = SS_UNCONNECTED; |
| 754 | |
Eric W. Biederman | 11aa9c2 | 2015-05-08 21:09:13 -0500 | [diff] [blame] | 755 | sk = sk_alloc(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto, kern); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 756 | if (!sk) |
| 757 | return -ENOMEM; |
| 758 | |
| 759 | sock_init_data(sock, sk); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 760 | sock_set_flag(sk, SOCK_RCU_FREE); |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 761 | sk->sk_state = RXRPC_UNBOUND; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 762 | sk->sk_write_space = rxrpc_write_space; |
David Howells | 0e119b4 | 2016-06-10 22:30:37 +0100 | [diff] [blame] | 763 | sk->sk_max_ack_backlog = 0; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 764 | sk->sk_destruct = rxrpc_sock_destructor; |
| 765 | |
| 766 | rx = rxrpc_sk(sk); |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 767 | rx->family = protocol; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 768 | rx->calls = RB_ROOT; |
| 769 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 770 | spin_lock_init(&rx->incoming_lock); |
| 771 | INIT_LIST_HEAD(&rx->sock_calls); |
| 772 | INIT_LIST_HEAD(&rx->to_be_accepted); |
| 773 | INIT_LIST_HEAD(&rx->recvmsg_q); |
| 774 | rwlock_init(&rx->recvmsg_lock); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 775 | rwlock_init(&rx->call_lock); |
| 776 | memset(&rx->srx, 0, sizeof(rx->srx)); |
| 777 | |
| 778 | _leave(" = 0 [%p]", rx); |
| 779 | return 0; |
| 780 | } |
| 781 | |
| 782 | /* |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 783 | * Kill all the calls on a socket and shut it down. |
| 784 | */ |
| 785 | static int rxrpc_shutdown(struct socket *sock, int flags) |
| 786 | { |
| 787 | struct sock *sk = sock->sk; |
| 788 | struct rxrpc_sock *rx = rxrpc_sk(sk); |
| 789 | int ret = 0; |
| 790 | |
| 791 | _enter("%p,%d", sk, flags); |
| 792 | |
| 793 | if (flags != SHUT_RDWR) |
| 794 | return -EOPNOTSUPP; |
| 795 | if (sk->sk_state == RXRPC_CLOSE) |
| 796 | return -ESHUTDOWN; |
| 797 | |
| 798 | lock_sock(sk); |
| 799 | |
| 800 | spin_lock_bh(&sk->sk_receive_queue.lock); |
| 801 | if (sk->sk_state < RXRPC_CLOSE) { |
| 802 | sk->sk_state = RXRPC_CLOSE; |
| 803 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 804 | } else { |
| 805 | ret = -ESHUTDOWN; |
| 806 | } |
| 807 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
| 808 | |
| 809 | rxrpc_discard_prealloc(rx); |
| 810 | |
| 811 | release_sock(sk); |
| 812 | return ret; |
| 813 | } |
| 814 | |
| 815 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 816 | * RxRPC socket destructor |
| 817 | */ |
| 818 | static void rxrpc_sock_destructor(struct sock *sk) |
| 819 | { |
| 820 | _enter("%p", sk); |
| 821 | |
| 822 | rxrpc_purge_queue(&sk->sk_receive_queue); |
| 823 | |
Reshetova, Elena | 14afee4 | 2017-06-30 13:08:00 +0300 | [diff] [blame] | 824 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 825 | WARN_ON(!sk_unhashed(sk)); |
| 826 | WARN_ON(sk->sk_socket); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 827 | |
| 828 | if (!sock_flag(sk, SOCK_DEAD)) { |
| 829 | printk("Attempt to release alive rxrpc socket: %p\n", sk); |
| 830 | return; |
| 831 | } |
| 832 | } |
| 833 | |
| 834 | /* |
| 835 | * release an RxRPC socket |
| 836 | */ |
| 837 | static int rxrpc_release_sock(struct sock *sk) |
| 838 | { |
| 839 | struct rxrpc_sock *rx = rxrpc_sk(sk); |
| 840 | |
Reshetova, Elena | 41c6d65 | 2017-06-30 13:08:01 +0300 | [diff] [blame] | 841 | _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt)); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 842 | |
| 843 | /* declare the socket closed for business */ |
| 844 | sock_orphan(sk); |
| 845 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 846 | |
| 847 | spin_lock_bh(&sk->sk_receive_queue.lock); |
| 848 | sk->sk_state = RXRPC_CLOSE; |
| 849 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
| 850 | |
David Howells | b63452c | 2016-10-06 08:11:48 +0100 | [diff] [blame] | 851 | if (rx->local && rcu_access_pointer(rx->local->service) == rx) { |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 852 | write_lock(&rx->local->services_lock); |
David Howells | b63452c | 2016-10-06 08:11:48 +0100 | [diff] [blame] | 853 | rcu_assign_pointer(rx->local->service, NULL); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 854 | write_unlock(&rx->local->services_lock); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 855 | } |
| 856 | |
| 857 | /* try to flush out this socket */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 858 | rxrpc_discard_prealloc(rx); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 859 | rxrpc_release_calls_on_socket(rx); |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 860 | flush_workqueue(rxrpc_workqueue); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 861 | rxrpc_purge_queue(&sk->sk_receive_queue); |
| 862 | |
David Howells | 5627cc8 | 2016-04-04 14:00:38 +0100 | [diff] [blame] | 863 | rxrpc_put_local(rx->local); |
| 864 | rx->local = NULL; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 865 | key_put(rx->key); |
| 866 | rx->key = NULL; |
| 867 | key_put(rx->securities); |
| 868 | rx->securities = NULL; |
| 869 | sock_put(sk); |
| 870 | |
| 871 | _leave(" = 0"); |
| 872 | return 0; |
| 873 | } |
| 874 | |
| 875 | /* |
| 876 | * release an RxRPC BSD socket on close() or equivalent |
| 877 | */ |
| 878 | static int rxrpc_release(struct socket *sock) |
| 879 | { |
| 880 | struct sock *sk = sock->sk; |
| 881 | |
| 882 | _enter("%p{%p}", sock, sk); |
| 883 | |
| 884 | if (!sk) |
| 885 | return 0; |
| 886 | |
| 887 | sock->sk = NULL; |
| 888 | |
| 889 | return rxrpc_release_sock(sk); |
| 890 | } |
| 891 | |
| 892 | /* |
| 893 | * RxRPC network protocol |
| 894 | */ |
| 895 | static const struct proto_ops rxrpc_rpc_ops = { |
David Howells | e33b3d9 | 2016-03-04 15:54:27 +0000 | [diff] [blame] | 896 | .family = PF_RXRPC, |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 897 | .owner = THIS_MODULE, |
| 898 | .release = rxrpc_release, |
| 899 | .bind = rxrpc_bind, |
| 900 | .connect = rxrpc_connect, |
| 901 | .socketpair = sock_no_socketpair, |
| 902 | .accept = sock_no_accept, |
| 903 | .getname = sock_no_getname, |
| 904 | .poll = rxrpc_poll, |
| 905 | .ioctl = sock_no_ioctl, |
| 906 | .listen = rxrpc_listen, |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 907 | .shutdown = rxrpc_shutdown, |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 908 | .setsockopt = rxrpc_setsockopt, |
David Howells | 515559c | 2017-06-07 16:27:15 +0100 | [diff] [blame] | 909 | .getsockopt = rxrpc_getsockopt, |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 910 | .sendmsg = rxrpc_sendmsg, |
| 911 | .recvmsg = rxrpc_recvmsg, |
| 912 | .mmap = sock_no_mmap, |
| 913 | .sendpage = sock_no_sendpage, |
| 914 | }; |
| 915 | |
| 916 | static struct proto rxrpc_proto = { |
| 917 | .name = "RXRPC", |
| 918 | .owner = THIS_MODULE, |
| 919 | .obj_size = sizeof(struct rxrpc_sock), |
David Howells | 0d12f8a | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 920 | .max_header = sizeof(struct rxrpc_wire_header), |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 921 | }; |
| 922 | |
Stephen Hemminger | ec1b4cf | 2009-10-05 05:58:39 +0000 | [diff] [blame] | 923 | static const struct net_proto_family rxrpc_family_ops = { |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 924 | .family = PF_RXRPC, |
| 925 | .create = rxrpc_create, |
| 926 | .owner = THIS_MODULE, |
| 927 | }; |
| 928 | |
| 929 | /* |
| 930 | * initialise and register the RxRPC protocol |
| 931 | */ |
| 932 | static int __init af_rxrpc_init(void) |
| 933 | { |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 934 | int ret = -1; |
Matthew Wilcox | 4443061 | 2016-12-14 15:09:19 -0800 | [diff] [blame] | 935 | unsigned int tmp; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 936 | |
YOSHIFUJI Hideaki / 吉藤英明 | ce6654c | 2013-01-09 07:20:01 +0000 | [diff] [blame] | 937 | BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > FIELD_SIZEOF(struct sk_buff, cb)); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 938 | |
Matthew Wilcox | 4443061 | 2016-12-14 15:09:19 -0800 | [diff] [blame] | 939 | get_random_bytes(&tmp, sizeof(tmp)); |
| 940 | tmp &= 0x3fffffff; |
| 941 | if (tmp == 0) |
| 942 | tmp = 1; |
| 943 | idr_set_cursor(&rxrpc_client_conn_ids, tmp); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 944 | |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 945 | ret = -ENOMEM; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 946 | rxrpc_call_jar = kmem_cache_create( |
| 947 | "rxrpc_call_jar", sizeof(struct rxrpc_call), 0, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 948 | SLAB_HWCACHE_ALIGN, NULL); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 949 | if (!rxrpc_call_jar) { |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 950 | pr_notice("Failed to allocate call jar\n"); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 951 | goto error_call_jar; |
| 952 | } |
| 953 | |
Tejun Heo | e1fcc7e | 2011-01-14 15:56:31 +0000 | [diff] [blame] | 954 | rxrpc_workqueue = alloc_workqueue("krxrpcd", 0, 1); |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 955 | if (!rxrpc_workqueue) { |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 956 | pr_notice("Failed to allocate work queue\n"); |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 957 | goto error_work_queue; |
| 958 | } |
| 959 | |
David Howells | 648af7f | 2016-04-07 17:23:51 +0100 | [diff] [blame] | 960 | ret = rxrpc_init_security(); |
| 961 | if (ret < 0) { |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 962 | pr_crit("Cannot initialise security\n"); |
David Howells | 648af7f | 2016-04-07 17:23:51 +0100 | [diff] [blame] | 963 | goto error_security; |
| 964 | } |
| 965 | |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 966 | ret = register_pernet_subsys(&rxrpc_net_ops); |
| 967 | if (ret) |
| 968 | goto error_pernet; |
| 969 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 970 | ret = proto_register(&rxrpc_proto, 1); |
YOSHIFUJI Hideaki | 1c89964 | 2007-07-19 10:44:44 +0900 | [diff] [blame] | 971 | if (ret < 0) { |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 972 | pr_crit("Cannot register protocol\n"); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 973 | goto error_proto; |
| 974 | } |
| 975 | |
| 976 | ret = sock_register(&rxrpc_family_ops); |
| 977 | if (ret < 0) { |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 978 | pr_crit("Cannot register socket family\n"); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 979 | goto error_sock; |
| 980 | } |
| 981 | |
| 982 | ret = register_key_type(&key_type_rxrpc); |
| 983 | if (ret < 0) { |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 984 | pr_crit("Cannot register client key type\n"); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 985 | goto error_key_type; |
| 986 | } |
| 987 | |
| 988 | ret = register_key_type(&key_type_rxrpc_s); |
| 989 | if (ret < 0) { |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 990 | pr_crit("Cannot register server key type\n"); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 991 | goto error_key_type_s; |
| 992 | } |
| 993 | |
David Howells | 5873c08 | 2014-02-07 18:58:44 +0000 | [diff] [blame] | 994 | ret = rxrpc_sysctl_init(); |
| 995 | if (ret < 0) { |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 996 | pr_crit("Cannot register sysctls\n"); |
David Howells | 5873c08 | 2014-02-07 18:58:44 +0000 | [diff] [blame] | 997 | goto error_sysctls; |
| 998 | } |
| 999 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1000 | return 0; |
| 1001 | |
David Howells | 5873c08 | 2014-02-07 18:58:44 +0000 | [diff] [blame] | 1002 | error_sysctls: |
| 1003 | unregister_key_type(&key_type_rxrpc_s); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1004 | error_key_type_s: |
| 1005 | unregister_key_type(&key_type_rxrpc); |
| 1006 | error_key_type: |
| 1007 | sock_unregister(PF_RXRPC); |
| 1008 | error_sock: |
| 1009 | proto_unregister(&rxrpc_proto); |
| 1010 | error_proto: |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 1011 | unregister_pernet_subsys(&rxrpc_net_ops); |
| 1012 | error_pernet: |
David Howells | 648af7f | 2016-04-07 17:23:51 +0100 | [diff] [blame] | 1013 | rxrpc_exit_security(); |
Wei Yongjun | 8addc04 | 2016-07-12 11:21:17 +0000 | [diff] [blame] | 1014 | error_security: |
| 1015 | destroy_workqueue(rxrpc_workqueue); |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 1016 | error_work_queue: |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1017 | kmem_cache_destroy(rxrpc_call_jar); |
| 1018 | error_call_jar: |
| 1019 | return ret; |
| 1020 | } |
| 1021 | |
| 1022 | /* |
| 1023 | * unregister the RxRPC protocol |
| 1024 | */ |
| 1025 | static void __exit af_rxrpc_exit(void) |
| 1026 | { |
| 1027 | _enter(""); |
David Howells | 5873c08 | 2014-02-07 18:58:44 +0000 | [diff] [blame] | 1028 | rxrpc_sysctl_exit(); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1029 | unregister_key_type(&key_type_rxrpc_s); |
| 1030 | unregister_key_type(&key_type_rxrpc); |
| 1031 | sock_unregister(PF_RXRPC); |
| 1032 | proto_unregister(&rxrpc_proto); |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 1033 | unregister_pernet_subsys(&rxrpc_net_ops); |
David Howells | 71f3ca4 | 2016-09-17 10:49:14 +0100 | [diff] [blame] | 1034 | ASSERTCMP(atomic_read(&rxrpc_n_tx_skbs), ==, 0); |
| 1035 | ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0); |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 1036 | |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 1037 | /* Make sure the local and peer records pinned by any dying connections |
| 1038 | * are released. |
| 1039 | */ |
| 1040 | rcu_barrier(); |
| 1041 | rxrpc_destroy_client_conn_ids(); |
| 1042 | |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 1043 | destroy_workqueue(rxrpc_workqueue); |
David Howells | 648af7f | 2016-04-07 17:23:51 +0100 | [diff] [blame] | 1044 | rxrpc_exit_security(); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1045 | kmem_cache_destroy(rxrpc_call_jar); |
| 1046 | _leave(""); |
| 1047 | } |
| 1048 | |
| 1049 | module_init(af_rxrpc_init); |
| 1050 | module_exit(af_rxrpc_exit); |