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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
b38d7324 UB |
2 | /* |
3 | * Shared Memory Communications over RDMA (SMC-R) and RoCE | |
4 | * | |
5 | * Socket Closing - normal and abnormal | |
6 | * | |
7 | * Copyright IBM Corp. 2016 | |
8 | * | |
9 | * Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com> | |
10 | */ | |
11 | ||
12 | #include <linux/workqueue.h> | |
c3edc401 IM |
13 | #include <linux/sched/signal.h> |
14 | ||
b38d7324 | 15 | #include <net/sock.h> |
83179760 | 16 | #include <net/tcp.h> |
b38d7324 UB |
17 | |
18 | #include "smc.h" | |
19 | #include "smc_tx.h" | |
20 | #include "smc_cdc.h" | |
21 | #include "smc_close.h" | |
22 | ||
fd57770d KG |
23 | /* release the clcsock that is assigned to the smc_sock */ |
24 | void smc_clcsock_release(struct smc_sock *smc) | |
25 | { | |
26 | struct socket *tcp; | |
27 | ||
28 | if (smc->listen_smc && current_work() != &smc->smc_listen_work) | |
29 | cancel_work_sync(&smc->smc_listen_work); | |
30 | mutex_lock(&smc->clcsock_release_lock); | |
31 | if (smc->clcsock) { | |
32 | tcp = smc->clcsock; | |
33 | smc->clcsock = NULL; | |
34 | sock_release(tcp); | |
35 | } | |
36 | mutex_unlock(&smc->clcsock_release_lock); | |
37 | } | |
38 | ||
b38d7324 UB |
39 | static void smc_close_cleanup_listen(struct sock *parent) |
40 | { | |
41 | struct sock *sk; | |
42 | ||
43 | /* Close non-accepted connections */ | |
44 | while ((sk = smc_accept_dequeue(parent, NULL))) | |
45 | smc_close_non_accepted(sk); | |
46 | } | |
47 | ||
b38d7324 UB |
48 | /* wait for sndbuf data being transmitted */ |
49 | static void smc_close_stream_wait(struct smc_sock *smc, long timeout) | |
50 | { | |
51 | DEFINE_WAIT_FUNC(wait, woken_wake_function); | |
52 | struct sock *sk = &smc->sk; | |
53 | ||
54 | if (!timeout) | |
55 | return; | |
56 | ||
57 | if (!smc_tx_prepared_sends(&smc->conn)) | |
58 | return; | |
59 | ||
60 | smc->wait_close_tx_prepared = 1; | |
61 | add_wait_queue(sk_sleep(sk), &wait); | |
62 | while (!signal_pending(current) && timeout) { | |
63 | int rc; | |
64 | ||
65 | rc = sk_wait_event(sk, &timeout, | |
66 | !smc_tx_prepared_sends(&smc->conn) || | |
d18963cf | 67 | sk->sk_err == ECONNABORTED || |
b2900980 UB |
68 | sk->sk_err == ECONNRESET || |
69 | smc->conn.killed, | |
b38d7324 UB |
70 | &wait); |
71 | if (rc) | |
72 | break; | |
73 | } | |
74 | remove_wait_queue(sk_sleep(sk), &wait); | |
75 | smc->wait_close_tx_prepared = 0; | |
76 | } | |
77 | ||
78 | void smc_close_wake_tx_prepared(struct smc_sock *smc) | |
79 | { | |
80 | if (smc->wait_close_tx_prepared) | |
81 | /* wake up socket closing */ | |
82 | smc->sk.sk_state_change(&smc->sk); | |
83 | } | |
84 | ||
85 | static int smc_close_wr(struct smc_connection *conn) | |
86 | { | |
87 | conn->local_tx_ctrl.conn_state_flags.peer_done_writing = 1; | |
88 | ||
89 | return smc_cdc_get_slot_and_msg_send(conn); | |
90 | } | |
91 | ||
92 | static int smc_close_final(struct smc_connection *conn) | |
93 | { | |
94 | if (atomic_read(&conn->bytes_to_rcv)) | |
95 | conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1; | |
96 | else | |
97 | conn->local_tx_ctrl.conn_state_flags.peer_conn_closed = 1; | |
b2900980 UB |
98 | if (conn->killed) |
99 | return -EPIPE; | |
b38d7324 UB |
100 | |
101 | return smc_cdc_get_slot_and_msg_send(conn); | |
102 | } | |
103 | ||
83179760 | 104 | int smc_close_abort(struct smc_connection *conn) |
b38d7324 UB |
105 | { |
106 | conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1; | |
107 | ||
108 | return smc_cdc_get_slot_and_msg_send(conn); | |
109 | } | |
110 | ||
42bfba9e UB |
111 | static void smc_close_cancel_work(struct smc_sock *smc) |
112 | { | |
113 | struct sock *sk = &smc->sk; | |
114 | ||
115 | release_sock(sk); | |
116 | cancel_work_sync(&smc->conn.close_work); | |
117 | cancel_delayed_work_sync(&smc->conn.tx_work); | |
118 | lock_sock(sk); | |
119 | sk->sk_state = SMC_CLOSED; | |
120 | } | |
121 | ||
b38d7324 | 122 | /* terminate smc socket abnormally - active abort |
732720fa | 123 | * link group is terminated, i.e. RDMA communication no longer possible |
b38d7324 | 124 | */ |
81cf4f47 | 125 | void smc_close_active_abort(struct smc_sock *smc) |
b38d7324 | 126 | { |
3163c507 | 127 | struct sock *sk = &smc->sk; |
81cf4f47 | 128 | bool release_clcsock = false; |
3163c507 | 129 | |
dd65d87a UB |
130 | if (sk->sk_state != SMC_INIT && smc->clcsock && smc->clcsock->sk) { |
131 | sk->sk_err = ECONNABORTED; | |
83179760 UB |
132 | if (smc->clcsock && smc->clcsock->sk) |
133 | tcp_abort(smc->clcsock->sk, ECONNABORTED); | |
b38d7324 | 134 | } |
3163c507 | 135 | switch (sk->sk_state) { |
46c28dbd | 136 | case SMC_ACTIVE: |
3163c507 | 137 | sk->sk_state = SMC_PEERABORTWAIT; |
42bfba9e | 138 | smc_close_cancel_work(smc); |
d18963cf | 139 | sk->sk_state = SMC_CLOSED; |
51f1de79 | 140 | sock_put(sk); /* passive closing */ |
b38d7324 UB |
141 | break; |
142 | case SMC_APPCLOSEWAIT1: | |
143 | case SMC_APPCLOSEWAIT2: | |
42bfba9e | 144 | smc_close_cancel_work(smc); |
d18963cf | 145 | sk->sk_state = SMC_CLOSED; |
81cf4f47 | 146 | sock_put(sk); /* postponed passive closing */ |
b38d7324 UB |
147 | break; |
148 | case SMC_PEERCLOSEWAIT1: | |
149 | case SMC_PEERCLOSEWAIT2: | |
d18963cf | 150 | case SMC_PEERFINCLOSEWAIT: |
42bfba9e UB |
151 | sk->sk_state = SMC_PEERABORTWAIT; |
152 | smc_close_cancel_work(smc); | |
d18963cf | 153 | sk->sk_state = SMC_CLOSED; |
81cf4f47 UB |
154 | smc_conn_free(&smc->conn); |
155 | release_clcsock = true; | |
51f1de79 | 156 | sock_put(sk); /* passive closing */ |
b38d7324 UB |
157 | break; |
158 | case SMC_PROCESSABORT: | |
159 | case SMC_APPFINCLOSEWAIT: | |
42bfba9e UB |
160 | sk->sk_state = SMC_PEERABORTWAIT; |
161 | smc_close_cancel_work(smc); | |
3163c507 | 162 | sk->sk_state = SMC_CLOSED; |
42bfba9e UB |
163 | smc_conn_free(&smc->conn); |
164 | release_clcsock = true; | |
b38d7324 | 165 | break; |
dd65d87a | 166 | case SMC_INIT: |
b38d7324 UB |
167 | case SMC_PEERABORTWAIT: |
168 | case SMC_CLOSED: | |
169 | break; | |
170 | } | |
171 | ||
3163c507 UB |
172 | sock_set_flag(sk, SOCK_DEAD); |
173 | sk->sk_state_change(sk); | |
81cf4f47 UB |
174 | |
175 | if (release_clcsock) { | |
176 | release_sock(sk); | |
177 | smc_clcsock_release(smc); | |
178 | lock_sock(sk); | |
179 | } | |
b38d7324 UB |
180 | } |
181 | ||
a98bf8c0 UB |
182 | static inline bool smc_close_sent_any_close(struct smc_connection *conn) |
183 | { | |
184 | return conn->local_tx_ctrl.conn_state_flags.peer_conn_abort || | |
185 | conn->local_tx_ctrl.conn_state_flags.peer_conn_closed; | |
186 | } | |
187 | ||
b38d7324 UB |
188 | int smc_close_active(struct smc_sock *smc) |
189 | { | |
190 | struct smc_cdc_conn_state_flags *txflags = | |
191 | &smc->conn.local_tx_ctrl.conn_state_flags; | |
b38d7324 UB |
192 | struct smc_connection *conn = &smc->conn; |
193 | struct sock *sk = &smc->sk; | |
194 | int old_state; | |
8c96feee | 195 | long timeout; |
b38d7324 UB |
196 | int rc = 0; |
197 | ||
8c96feee UB |
198 | timeout = current->flags & PF_EXITING ? |
199 | 0 : sock_flag(sk, SOCK_LINGER) ? | |
200 | sk->sk_lingertime : SMC_MAX_STREAM_WAIT_TIMEOUT; | |
b38d7324 | 201 | |
b38d7324 | 202 | old_state = sk->sk_state; |
bbb96bf2 UB |
203 | again: |
204 | switch (sk->sk_state) { | |
b38d7324 UB |
205 | case SMC_INIT: |
206 | sk->sk_state = SMC_CLOSED; | |
b38d7324 UB |
207 | break; |
208 | case SMC_LISTEN: | |
209 | sk->sk_state = SMC_CLOSED; | |
210 | sk->sk_state_change(sk); /* wake up accept */ | |
211 | if (smc->clcsock && smc->clcsock->sk) { | |
212 | rc = kernel_sock_shutdown(smc->clcsock, SHUT_RDWR); | |
213 | /* wake up kernel_accept of smc_tcp_listen_worker */ | |
214 | smc->clcsock->sk->sk_data_ready(smc->clcsock->sk); | |
215 | } | |
b38d7324 | 216 | smc_close_cleanup_listen(sk); |
3d502067 UB |
217 | release_sock(sk); |
218 | flush_work(&smc->tcp_listen_work); | |
219 | lock_sock(sk); | |
b38d7324 UB |
220 | break; |
221 | case SMC_ACTIVE: | |
222 | smc_close_stream_wait(smc, timeout); | |
223 | release_sock(sk); | |
18e537cd | 224 | cancel_delayed_work_sync(&conn->tx_work); |
b38d7324 UB |
225 | lock_sock(sk); |
226 | if (sk->sk_state == SMC_ACTIVE) { | |
227 | /* send close request */ | |
228 | rc = smc_close_final(conn); | |
229 | sk->sk_state = SMC_PEERCLOSEWAIT1; | |
230 | } else { | |
231 | /* peer event has changed the state */ | |
232 | goto again; | |
233 | } | |
234 | break; | |
235 | case SMC_APPFINCLOSEWAIT: | |
236 | /* socket already shutdown wr or both (active close) */ | |
237 | if (txflags->peer_done_writing && | |
a98bf8c0 | 238 | !smc_close_sent_any_close(conn)) { |
b38d7324 UB |
239 | /* just shutdown wr done, send close request */ |
240 | rc = smc_close_final(conn); | |
241 | } | |
242 | sk->sk_state = SMC_CLOSED; | |
b38d7324 UB |
243 | break; |
244 | case SMC_APPCLOSEWAIT1: | |
245 | case SMC_APPCLOSEWAIT2: | |
246 | if (!smc_cdc_rxed_any_close(conn)) | |
247 | smc_close_stream_wait(smc, timeout); | |
248 | release_sock(sk); | |
18e537cd | 249 | cancel_delayed_work_sync(&conn->tx_work); |
b38d7324 | 250 | lock_sock(sk); |
bbb96bf2 UB |
251 | if (sk->sk_state != SMC_APPCLOSEWAIT1 && |
252 | sk->sk_state != SMC_APPCLOSEWAIT2) | |
253 | goto again; | |
254 | /* confirm close from peer */ | |
255 | rc = smc_close_final(conn); | |
51f1de79 | 256 | if (smc_cdc_rxed_any_close(conn)) { |
b38d7324 UB |
257 | /* peer has closed the socket already */ |
258 | sk->sk_state = SMC_CLOSED; | |
51f1de79 UB |
259 | sock_put(sk); /* postponed passive closing */ |
260 | } else { | |
b38d7324 UB |
261 | /* peer has just issued a shutdown write */ |
262 | sk->sk_state = SMC_PEERFINCLOSEWAIT; | |
51f1de79 | 263 | } |
b38d7324 UB |
264 | break; |
265 | case SMC_PEERCLOSEWAIT1: | |
266 | case SMC_PEERCLOSEWAIT2: | |
a98bf8c0 UB |
267 | if (txflags->peer_done_writing && |
268 | !smc_close_sent_any_close(conn)) { | |
269 | /* just shutdown wr done, send close request */ | |
270 | rc = smc_close_final(conn); | |
271 | } | |
272 | /* peer sending PeerConnectionClosed will cause transition */ | |
273 | break; | |
b38d7324 UB |
274 | case SMC_PEERFINCLOSEWAIT: |
275 | /* peer sending PeerConnectionClosed will cause transition */ | |
276 | break; | |
277 | case SMC_PROCESSABORT: | |
d18963cf | 278 | rc = smc_close_abort(conn); |
b38d7324 | 279 | sk->sk_state = SMC_CLOSED; |
b38d7324 UB |
280 | break; |
281 | case SMC_PEERABORTWAIT: | |
d18963cf UB |
282 | sk->sk_state = SMC_CLOSED; |
283 | break; | |
b38d7324 UB |
284 | case SMC_CLOSED: |
285 | /* nothing to do, add tracing in future patch */ | |
286 | break; | |
287 | } | |
288 | ||
289 | if (old_state != sk->sk_state) | |
3163c507 | 290 | sk->sk_state_change(sk); |
b38d7324 UB |
291 | return rc; |
292 | } | |
293 | ||
294 | static void smc_close_passive_abort_received(struct smc_sock *smc) | |
295 | { | |
296 | struct smc_cdc_conn_state_flags *txflags = | |
297 | &smc->conn.local_tx_ctrl.conn_state_flags; | |
298 | struct sock *sk = &smc->sk; | |
299 | ||
300 | switch (sk->sk_state) { | |
51f1de79 | 301 | case SMC_INIT: |
b38d7324 | 302 | case SMC_ACTIVE: |
b38d7324 | 303 | case SMC_APPCLOSEWAIT1: |
51f1de79 UB |
304 | sk->sk_state = SMC_PROCESSABORT; |
305 | sock_put(sk); /* passive closing */ | |
306 | break; | |
307 | case SMC_APPFINCLOSEWAIT: | |
b38d7324 UB |
308 | sk->sk_state = SMC_PROCESSABORT; |
309 | break; | |
310 | case SMC_PEERCLOSEWAIT1: | |
311 | case SMC_PEERCLOSEWAIT2: | |
312 | if (txflags->peer_done_writing && | |
51f1de79 | 313 | !smc_close_sent_any_close(&smc->conn)) |
b38d7324 | 314 | /* just shutdown, but not yet closed locally */ |
b38d7324 | 315 | sk->sk_state = SMC_PROCESSABORT; |
51f1de79 | 316 | else |
b38d7324 | 317 | sk->sk_state = SMC_CLOSED; |
51f1de79 | 318 | sock_put(sk); /* passive closing */ |
b38d7324 | 319 | break; |
51f1de79 | 320 | case SMC_APPCLOSEWAIT2: |
b38d7324 | 321 | case SMC_PEERFINCLOSEWAIT: |
51f1de79 UB |
322 | sk->sk_state = SMC_CLOSED; |
323 | sock_put(sk); /* passive closing */ | |
324 | break; | |
b38d7324 UB |
325 | case SMC_PEERABORTWAIT: |
326 | sk->sk_state = SMC_CLOSED; | |
327 | break; | |
b38d7324 UB |
328 | case SMC_PROCESSABORT: |
329 | /* nothing to do, add tracing in future patch */ | |
330 | break; | |
331 | } | |
332 | } | |
333 | ||
732720fa UB |
334 | /* Either some kind of closing has been received: peer_conn_closed, |
335 | * peer_conn_abort, or peer_done_writing | |
336 | * or the link group of the connection terminates abnormally. | |
b38d7324 | 337 | */ |
46c28dbd | 338 | static void smc_close_passive_work(struct work_struct *work) |
b38d7324 | 339 | { |
46c28dbd UB |
340 | struct smc_connection *conn = container_of(work, |
341 | struct smc_connection, | |
342 | close_work); | |
343 | struct smc_sock *smc = container_of(conn, struct smc_sock, conn); | |
344 | struct smc_cdc_conn_state_flags *rxflags; | |
fd57770d | 345 | bool release_clcsock = false; |
b38d7324 UB |
346 | struct sock *sk = &smc->sk; |
347 | int old_state; | |
348 | ||
3163c507 | 349 | lock_sock(sk); |
b38d7324 UB |
350 | old_state = sk->sk_state; |
351 | ||
3163c507 | 352 | rxflags = &conn->local_rx_ctrl.conn_state_flags; |
b38d7324 | 353 | if (rxflags->peer_conn_abort) { |
732720fa | 354 | /* peer has not received all data */ |
b38d7324 | 355 | smc_close_passive_abort_received(smc); |
611b63a1 UB |
356 | release_sock(&smc->sk); |
357 | cancel_delayed_work_sync(&conn->tx_work); | |
358 | lock_sock(&smc->sk); | |
b38d7324 UB |
359 | goto wakeup; |
360 | } | |
361 | ||
362 | switch (sk->sk_state) { | |
363 | case SMC_INIT: | |
84b799a2 | 364 | sk->sk_state = SMC_APPCLOSEWAIT1; |
b38d7324 UB |
365 | break; |
366 | case SMC_ACTIVE: | |
367 | sk->sk_state = SMC_APPCLOSEWAIT1; | |
51f1de79 UB |
368 | /* postpone sock_put() for passive closing to cover |
369 | * received SEND_SHUTDOWN as well | |
370 | */ | |
b38d7324 UB |
371 | break; |
372 | case SMC_PEERCLOSEWAIT1: | |
373 | if (rxflags->peer_done_writing) | |
374 | sk->sk_state = SMC_PEERCLOSEWAIT2; | |
7f6b437e GS |
375 | /* fall through */ |
376 | /* to check for closing */ | |
b38d7324 | 377 | case SMC_PEERCLOSEWAIT2: |
3163c507 | 378 | if (!smc_cdc_rxed_any_close(conn)) |
b38d7324 UB |
379 | break; |
380 | if (sock_flag(sk, SOCK_DEAD) && | |
a98bf8c0 | 381 | smc_close_sent_any_close(conn)) { |
b38d7324 UB |
382 | /* smc_release has already been called locally */ |
383 | sk->sk_state = SMC_CLOSED; | |
384 | } else { | |
385 | /* just shutdown, but not yet closed locally */ | |
386 | sk->sk_state = SMC_APPFINCLOSEWAIT; | |
387 | } | |
51f1de79 | 388 | sock_put(sk); /* passive closing */ |
b38d7324 | 389 | break; |
5ac92a00 | 390 | case SMC_PEERFINCLOSEWAIT: |
51f1de79 | 391 | if (smc_cdc_rxed_any_close(conn)) { |
5ac92a00 | 392 | sk->sk_state = SMC_CLOSED; |
51f1de79 UB |
393 | sock_put(sk); /* passive closing */ |
394 | } | |
5ac92a00 | 395 | break; |
b38d7324 UB |
396 | case SMC_APPCLOSEWAIT1: |
397 | case SMC_APPCLOSEWAIT2: | |
51f1de79 UB |
398 | /* postpone sock_put() for passive closing to cover |
399 | * received SEND_SHUTDOWN as well | |
400 | */ | |
401 | break; | |
b38d7324 UB |
402 | case SMC_APPFINCLOSEWAIT: |
403 | case SMC_PEERABORTWAIT: | |
404 | case SMC_PROCESSABORT: | |
405 | case SMC_CLOSED: | |
406 | /* nothing to do, add tracing in future patch */ | |
407 | break; | |
408 | } | |
409 | ||
410 | wakeup: | |
b38d7324 UB |
411 | sk->sk_data_ready(sk); /* wakeup blocked rcvbuf consumers */ |
412 | sk->sk_write_space(sk); /* wakeup blocked sndbuf producers */ | |
413 | ||
a98bf8c0 UB |
414 | if (old_state != sk->sk_state) { |
415 | sk->sk_state_change(sk); | |
416 | if ((sk->sk_state == SMC_CLOSED) && | |
b03faa1f | 417 | (sock_flag(sk, SOCK_DEAD) || !sk->sk_socket)) { |
3163c507 | 418 | smc_conn_free(conn); |
fd57770d KG |
419 | if (smc->clcsock) |
420 | release_clcsock = true; | |
b03faa1f | 421 | } |
b38d7324 | 422 | } |
3163c507 | 423 | release_sock(sk); |
fd57770d KG |
424 | if (release_clcsock) |
425 | smc_clcsock_release(smc); | |
51f1de79 | 426 | sock_put(sk); /* sock_hold done by schedulers of close_work */ |
b38d7324 UB |
427 | } |
428 | ||
429 | int smc_close_shutdown_write(struct smc_sock *smc) | |
430 | { | |
431 | struct smc_connection *conn = &smc->conn; | |
b38d7324 UB |
432 | struct sock *sk = &smc->sk; |
433 | int old_state; | |
8c96feee | 434 | long timeout; |
b38d7324 UB |
435 | int rc = 0; |
436 | ||
8c96feee UB |
437 | timeout = current->flags & PF_EXITING ? |
438 | 0 : sock_flag(sk, SOCK_LINGER) ? | |
439 | sk->sk_lingertime : SMC_MAX_STREAM_WAIT_TIMEOUT; | |
b38d7324 | 440 | |
b38d7324 | 441 | old_state = sk->sk_state; |
bbb96bf2 UB |
442 | again: |
443 | switch (sk->sk_state) { | |
b38d7324 UB |
444 | case SMC_ACTIVE: |
445 | smc_close_stream_wait(smc, timeout); | |
446 | release_sock(sk); | |
18e537cd | 447 | cancel_delayed_work_sync(&conn->tx_work); |
b38d7324 | 448 | lock_sock(sk); |
bbb96bf2 UB |
449 | if (sk->sk_state != SMC_ACTIVE) |
450 | goto again; | |
b38d7324 UB |
451 | /* send close wr request */ |
452 | rc = smc_close_wr(conn); | |
bbb96bf2 | 453 | sk->sk_state = SMC_PEERCLOSEWAIT1; |
b38d7324 UB |
454 | break; |
455 | case SMC_APPCLOSEWAIT1: | |
456 | /* passive close */ | |
457 | if (!smc_cdc_rxed_any_close(conn)) | |
458 | smc_close_stream_wait(smc, timeout); | |
459 | release_sock(sk); | |
18e537cd | 460 | cancel_delayed_work_sync(&conn->tx_work); |
b38d7324 | 461 | lock_sock(sk); |
bbb96bf2 UB |
462 | if (sk->sk_state != SMC_APPCLOSEWAIT1) |
463 | goto again; | |
b38d7324 UB |
464 | /* confirm close from peer */ |
465 | rc = smc_close_wr(conn); | |
466 | sk->sk_state = SMC_APPCLOSEWAIT2; | |
467 | break; | |
468 | case SMC_APPCLOSEWAIT2: | |
469 | case SMC_PEERFINCLOSEWAIT: | |
470 | case SMC_PEERCLOSEWAIT1: | |
471 | case SMC_PEERCLOSEWAIT2: | |
472 | case SMC_APPFINCLOSEWAIT: | |
473 | case SMC_PROCESSABORT: | |
474 | case SMC_PEERABORTWAIT: | |
475 | /* nothing to do, add tracing in future patch */ | |
476 | break; | |
477 | } | |
478 | ||
479 | if (old_state != sk->sk_state) | |
3163c507 | 480 | sk->sk_state_change(sk); |
b38d7324 UB |
481 | return rc; |
482 | } | |
46c28dbd UB |
483 | |
484 | /* Initialize close properties on connection establishment. */ | |
485 | void smc_close_init(struct smc_sock *smc) | |
486 | { | |
487 | INIT_WORK(&smc->conn.close_work, smc_close_passive_work); | |
488 | } |