1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 /* 2 /*
3 * Shared Memory Communications over RDMA (SM 3 * Shared Memory Communications over RDMA (SMC-R) and RoCE
4 * 4 *
5 * Socket Closing - normal and abnormal 5 * Socket Closing - normal and abnormal
6 * 6 *
7 * Copyright IBM Corp. 2016 7 * Copyright IBM Corp. 2016
8 * 8 *
9 * Author(s): Ursula Braun <ubraun@linux.vne 9 * Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
10 */ 10 */
11 11
12 #include <linux/workqueue.h> 12 #include <linux/workqueue.h>
13 #include <linux/sched/signal.h> 13 #include <linux/sched/signal.h>
14 14
15 #include <net/sock.h> 15 #include <net/sock.h>
16 #include <net/tcp.h> <<
17 16
18 #include "smc.h" 17 #include "smc.h"
19 #include "smc_tx.h" 18 #include "smc_tx.h"
20 #include "smc_cdc.h" 19 #include "smc_cdc.h"
21 #include "smc_close.h" 20 #include "smc_close.h"
22 21
23 /* release the clcsock that is assigned to the !! 22 #define SMC_CLOSE_WAIT_LISTEN_CLCSOCK_TIME (5 * HZ)
24 void smc_clcsock_release(struct smc_sock *smc) <<
25 { <<
26 struct socket *tcp; <<
27 <<
28 if (smc->listen_smc && current_work() <<
29 cancel_work_sync(&smc->smc_lis <<
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_loc <<
37 } <<
38 23
39 static void smc_close_cleanup_listen(struct so 24 static void smc_close_cleanup_listen(struct sock *parent)
40 { 25 {
41 struct sock *sk; 26 struct sock *sk;
42 27
43 /* Close non-accepted connections */ 28 /* Close non-accepted connections */
44 while ((sk = smc_accept_dequeue(parent 29 while ((sk = smc_accept_dequeue(parent, NULL)))
45 smc_close_non_accepted(sk); 30 smc_close_non_accepted(sk);
46 } 31 }
47 32
48 /* wait for sndbuf data being transmitted */ 33 /* wait for sndbuf data being transmitted */
49 static void smc_close_stream_wait(struct smc_s 34 static void smc_close_stream_wait(struct smc_sock *smc, long timeout)
50 { 35 {
51 DEFINE_WAIT_FUNC(wait, woken_wake_func 36 DEFINE_WAIT_FUNC(wait, woken_wake_function);
52 struct sock *sk = &smc->sk; 37 struct sock *sk = &smc->sk;
53 38
54 if (!timeout) 39 if (!timeout)
55 return; 40 return;
56 41
57 if (!smc_tx_prepared_sends(&smc->conn) 42 if (!smc_tx_prepared_sends(&smc->conn))
58 return; 43 return;
59 44
60 /* Send out corked data remaining in s <<
61 smc_tx_pending(&smc->conn); <<
62 <<
63 smc->wait_close_tx_prepared = 1; 45 smc->wait_close_tx_prepared = 1;
64 add_wait_queue(sk_sleep(sk), &wait); 46 add_wait_queue(sk_sleep(sk), &wait);
65 while (!signal_pending(current) && tim 47 while (!signal_pending(current) && timeout) {
66 int rc; 48 int rc;
67 49
68 rc = sk_wait_event(sk, &timeou 50 rc = sk_wait_event(sk, &timeout,
69 !smc_tx_pre 51 !smc_tx_prepared_sends(&smc->conn) ||
70 READ_ONCE(s !! 52 (sk->sk_err == ECONNABORTED) ||
71 READ_ONCE(s !! 53 (sk->sk_err == ECONNRESET),
72 smc->conn.k <<
73 &wait); 54 &wait);
74 if (rc) 55 if (rc)
75 break; 56 break;
76 } 57 }
77 remove_wait_queue(sk_sleep(sk), &wait) 58 remove_wait_queue(sk_sleep(sk), &wait);
78 smc->wait_close_tx_prepared = 0; 59 smc->wait_close_tx_prepared = 0;
79 } 60 }
80 61
81 void smc_close_wake_tx_prepared(struct smc_soc 62 void smc_close_wake_tx_prepared(struct smc_sock *smc)
82 { 63 {
83 if (smc->wait_close_tx_prepared) 64 if (smc->wait_close_tx_prepared)
84 /* wake up socket closing */ 65 /* wake up socket closing */
85 smc->sk.sk_state_change(&smc-> 66 smc->sk.sk_state_change(&smc->sk);
86 } 67 }
87 68
88 static int smc_close_wr(struct smc_connection 69 static int smc_close_wr(struct smc_connection *conn)
89 { 70 {
90 conn->local_tx_ctrl.conn_state_flags.p 71 conn->local_tx_ctrl.conn_state_flags.peer_done_writing = 1;
91 72
92 return smc_cdc_get_slot_and_msg_send(c 73 return smc_cdc_get_slot_and_msg_send(conn);
93 } 74 }
94 75
95 static int smc_close_final(struct smc_connecti 76 static int smc_close_final(struct smc_connection *conn)
96 { 77 {
97 if (atomic_read(&conn->bytes_to_rcv)) 78 if (atomic_read(&conn->bytes_to_rcv))
98 conn->local_tx_ctrl.conn_state 79 conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1;
99 else 80 else
100 conn->local_tx_ctrl.conn_state 81 conn->local_tx_ctrl.conn_state_flags.peer_conn_closed = 1;
101 if (conn->killed) <<
102 return -EPIPE; <<
103 82
104 return smc_cdc_get_slot_and_msg_send(c 83 return smc_cdc_get_slot_and_msg_send(conn);
105 } 84 }
106 85
107 int smc_close_abort(struct smc_connection *con !! 86 static int smc_close_abort(struct smc_connection *conn)
108 { 87 {
109 conn->local_tx_ctrl.conn_state_flags.p 88 conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1;
110 89
111 return smc_cdc_get_slot_and_msg_send(c 90 return smc_cdc_get_slot_and_msg_send(conn);
112 } 91 }
113 92
114 static void smc_close_cancel_work(struct smc_s <<
115 { <<
116 struct sock *sk = &smc->sk; <<
117 <<
118 release_sock(sk); <<
119 if (cancel_work_sync(&smc->conn.close_ <<
120 sock_put(sk); <<
121 cancel_delayed_work_sync(&smc->conn.tx <<
122 lock_sock(sk); <<
123 } <<
124 <<
125 /* terminate smc socket abnormally - active ab 93 /* terminate smc socket abnormally - active abort
126 * link group is terminated, i.e. RDMA communi 94 * link group is terminated, i.e. RDMA communication no longer possible
127 */ 95 */
128 void smc_close_active_abort(struct smc_sock *s !! 96 static void smc_close_active_abort(struct smc_sock *smc)
129 { 97 {
130 struct sock *sk = &smc->sk; 98 struct sock *sk = &smc->sk;
131 bool release_clcsock = false; !! 99
>> 100 struct smc_cdc_conn_state_flags *txflags =
>> 101 &smc->conn.local_tx_ctrl.conn_state_flags;
132 102
133 if (sk->sk_state != SMC_INIT && smc->c 103 if (sk->sk_state != SMC_INIT && smc->clcsock && smc->clcsock->sk) {
134 sk->sk_err = ECONNABORTED; 104 sk->sk_err = ECONNABORTED;
135 if (smc->clcsock && smc->clcso !! 105 if (smc->clcsock && smc->clcsock->sk) {
136 tcp_abort(smc->clcsock !! 106 smc->clcsock->sk->sk_err = ECONNABORTED;
>> 107 smc->clcsock->sk->sk_state_change(smc->clcsock->sk);
>> 108 }
137 } 109 }
138 switch (sk->sk_state) { 110 switch (sk->sk_state) {
139 case SMC_ACTIVE: 111 case SMC_ACTIVE:
>> 112 sk->sk_state = SMC_PEERABORTWAIT;
>> 113 release_sock(sk);
>> 114 cancel_delayed_work_sync(&smc->conn.tx_work);
>> 115 lock_sock(sk);
>> 116 sock_put(sk); /* passive closing */
>> 117 break;
140 case SMC_APPCLOSEWAIT1: 118 case SMC_APPCLOSEWAIT1:
141 case SMC_APPCLOSEWAIT2: 119 case SMC_APPCLOSEWAIT2:
142 sk->sk_state = SMC_PEERABORTWA !! 120 if (!smc_cdc_rxed_any_close(&smc->conn))
143 smc_close_cancel_work(smc); !! 121 sk->sk_state = SMC_PEERABORTWAIT;
144 if (sk->sk_state != SMC_PEERAB !! 122 else
145 break; !! 123 sk->sk_state = SMC_CLOSED;
146 sk->sk_state = SMC_CLOSED; !! 124 release_sock(sk);
147 sock_put(sk); /* (postponed) p !! 125 cancel_delayed_work_sync(&smc->conn.tx_work);
>> 126 lock_sock(sk);
148 break; 127 break;
149 case SMC_PEERCLOSEWAIT1: 128 case SMC_PEERCLOSEWAIT1:
150 case SMC_PEERCLOSEWAIT2: 129 case SMC_PEERCLOSEWAIT2:
151 case SMC_PEERFINCLOSEWAIT: !! 130 if (!txflags->peer_conn_closed) {
152 sk->sk_state = SMC_PEERABORTWA !! 131 /* just SHUTDOWN_SEND done */
153 smc_close_cancel_work(smc); !! 132 sk->sk_state = SMC_PEERABORTWAIT;
154 if (sk->sk_state != SMC_PEERAB !! 133 } else {
155 break; !! 134 sk->sk_state = SMC_CLOSED;
156 sk->sk_state = SMC_CLOSED; !! 135 }
157 smc_conn_free(&smc->conn); <<
158 release_clcsock = true; <<
159 sock_put(sk); /* passive closi 136 sock_put(sk); /* passive closing */
160 break; 137 break;
161 case SMC_PROCESSABORT: 138 case SMC_PROCESSABORT:
162 case SMC_APPFINCLOSEWAIT: 139 case SMC_APPFINCLOSEWAIT:
163 sk->sk_state = SMC_PEERABORTWA <<
164 smc_close_cancel_work(smc); <<
165 if (sk->sk_state != SMC_PEERAB <<
166 break; <<
167 sk->sk_state = SMC_CLOSED; 140 sk->sk_state = SMC_CLOSED;
168 smc_conn_free(&smc->conn); !! 141 break;
169 release_clcsock = true; !! 142 case SMC_PEERFINCLOSEWAIT:
>> 143 sock_put(sk); /* passive closing */
170 break; 144 break;
171 case SMC_INIT: 145 case SMC_INIT:
172 case SMC_PEERABORTWAIT: 146 case SMC_PEERABORTWAIT:
173 case SMC_CLOSED: 147 case SMC_CLOSED:
174 break; 148 break;
175 } 149 }
176 150
177 smc_sock_set_flag(sk, SOCK_DEAD); !! 151 sock_set_flag(sk, SOCK_DEAD);
178 sk->sk_state_change(sk); 152 sk->sk_state_change(sk);
179 <<
180 if (release_clcsock) { <<
181 release_sock(sk); <<
182 smc_clcsock_release(smc); <<
183 lock_sock(sk); <<
184 } <<
185 } 153 }
186 154
187 static inline bool smc_close_sent_any_close(st 155 static inline bool smc_close_sent_any_close(struct smc_connection *conn)
188 { 156 {
189 return conn->local_tx_ctrl.conn_state_ 157 return conn->local_tx_ctrl.conn_state_flags.peer_conn_abort ||
190 conn->local_tx_ctrl.conn_state_ 158 conn->local_tx_ctrl.conn_state_flags.peer_conn_closed;
191 } 159 }
192 160
193 int smc_close_active(struct smc_sock *smc) 161 int smc_close_active(struct smc_sock *smc)
194 { 162 {
195 struct smc_cdc_conn_state_flags *txfla 163 struct smc_cdc_conn_state_flags *txflags =
196 &smc->conn.local_tx_ctrl.conn_ 164 &smc->conn.local_tx_ctrl.conn_state_flags;
197 struct smc_connection *conn = &smc->co 165 struct smc_connection *conn = &smc->conn;
198 struct sock *sk = &smc->sk; 166 struct sock *sk = &smc->sk;
199 int old_state; 167 int old_state;
200 long timeout; 168 long timeout;
201 int rc = 0; 169 int rc = 0;
202 int rc1 = 0; <<
203 170
204 timeout = current->flags & PF_EXITING 171 timeout = current->flags & PF_EXITING ?
205 0 : sock_flag(sk, SOCK_LINGE 172 0 : sock_flag(sk, SOCK_LINGER) ?
206 sk->sk_lingertime : SMC_ 173 sk->sk_lingertime : SMC_MAX_STREAM_WAIT_TIMEOUT;
207 174
208 old_state = sk->sk_state; 175 old_state = sk->sk_state;
209 again: 176 again:
210 switch (sk->sk_state) { 177 switch (sk->sk_state) {
211 case SMC_INIT: 178 case SMC_INIT:
212 sk->sk_state = SMC_CLOSED; 179 sk->sk_state = SMC_CLOSED;
213 break; 180 break;
214 case SMC_LISTEN: 181 case SMC_LISTEN:
215 sk->sk_state = SMC_CLOSED; 182 sk->sk_state = SMC_CLOSED;
216 sk->sk_state_change(sk); /* wa 183 sk->sk_state_change(sk); /* wake up accept */
217 if (smc->clcsock && smc->clcso 184 if (smc->clcsock && smc->clcsock->sk) {
218 write_lock_bh(&smc->cl <<
219 smc_clcsock_restore_cb <<
220 <<
221 smc->clcsock->sk->sk_u <<
222 write_unlock_bh(&smc-> <<
223 rc = kernel_sock_shutd 185 rc = kernel_sock_shutdown(smc->clcsock, SHUT_RDWR);
>> 186 /* wake up kernel_accept of smc_tcp_listen_worker */
>> 187 smc->clcsock->sk->sk_data_ready(smc->clcsock->sk);
224 } 188 }
225 smc_close_cleanup_listen(sk); 189 smc_close_cleanup_listen(sk);
226 release_sock(sk); 190 release_sock(sk);
227 flush_work(&smc->tcp_listen_wo 191 flush_work(&smc->tcp_listen_work);
228 lock_sock(sk); 192 lock_sock(sk);
229 break; 193 break;
230 case SMC_ACTIVE: 194 case SMC_ACTIVE:
231 smc_close_stream_wait(smc, tim 195 smc_close_stream_wait(smc, timeout);
232 release_sock(sk); 196 release_sock(sk);
233 cancel_delayed_work_sync(&conn 197 cancel_delayed_work_sync(&conn->tx_work);
234 lock_sock(sk); 198 lock_sock(sk);
235 if (sk->sk_state == SMC_ACTIVE 199 if (sk->sk_state == SMC_ACTIVE) {
236 /* send close request 200 /* send close request */
237 rc = smc_close_final(c 201 rc = smc_close_final(conn);
>> 202 if (rc)
>> 203 break;
238 sk->sk_state = SMC_PEE 204 sk->sk_state = SMC_PEERCLOSEWAIT1;
239 <<
240 /* actively shutdown c <<
241 * prevent peer from e <<
242 */ <<
243 if (smc->clcsock && sm <<
244 rc1 = kernel_s <<
245 <<
246 rc = rc ? rc : <<
247 } <<
248 } else { 205 } else {
249 /* peer event has chan 206 /* peer event has changed the state */
250 goto again; 207 goto again;
251 } 208 }
252 break; 209 break;
253 case SMC_APPFINCLOSEWAIT: 210 case SMC_APPFINCLOSEWAIT:
254 /* socket already shutdown wr 211 /* socket already shutdown wr or both (active close) */
255 if (txflags->peer_done_writing 212 if (txflags->peer_done_writing &&
256 !smc_close_sent_any_close( 213 !smc_close_sent_any_close(conn)) {
257 /* just shutdown wr do 214 /* just shutdown wr done, send close request */
258 rc = smc_close_final(c 215 rc = smc_close_final(conn);
>> 216 if (rc)
>> 217 break;
259 } 218 }
260 sk->sk_state = SMC_CLOSED; 219 sk->sk_state = SMC_CLOSED;
261 break; 220 break;
262 case SMC_APPCLOSEWAIT1: 221 case SMC_APPCLOSEWAIT1:
263 case SMC_APPCLOSEWAIT2: 222 case SMC_APPCLOSEWAIT2:
264 if (!smc_cdc_rxed_any_close(co 223 if (!smc_cdc_rxed_any_close(conn))
265 smc_close_stream_wait( 224 smc_close_stream_wait(smc, timeout);
266 release_sock(sk); 225 release_sock(sk);
267 cancel_delayed_work_sync(&conn 226 cancel_delayed_work_sync(&conn->tx_work);
268 lock_sock(sk); 227 lock_sock(sk);
269 if (sk->sk_state != SMC_APPCLO 228 if (sk->sk_state != SMC_APPCLOSEWAIT1 &&
270 sk->sk_state != SMC_APPCLO 229 sk->sk_state != SMC_APPCLOSEWAIT2)
271 goto again; 230 goto again;
272 /* confirm close from peer */ 231 /* confirm close from peer */
273 rc = smc_close_final(conn); 232 rc = smc_close_final(conn);
>> 233 if (rc)
>> 234 break;
274 if (smc_cdc_rxed_any_close(con 235 if (smc_cdc_rxed_any_close(conn)) {
275 /* peer has closed the 236 /* peer has closed the socket already */
276 sk->sk_state = SMC_CLO 237 sk->sk_state = SMC_CLOSED;
277 sock_put(sk); /* postp 238 sock_put(sk); /* postponed passive closing */
278 } else { 239 } else {
279 /* peer has just issue 240 /* peer has just issued a shutdown write */
280 sk->sk_state = SMC_PEE 241 sk->sk_state = SMC_PEERFINCLOSEWAIT;
281 } 242 }
282 break; 243 break;
283 case SMC_PEERCLOSEWAIT1: 244 case SMC_PEERCLOSEWAIT1:
284 case SMC_PEERCLOSEWAIT2: 245 case SMC_PEERCLOSEWAIT2:
285 if (txflags->peer_done_writing 246 if (txflags->peer_done_writing &&
286 !smc_close_sent_any_close( 247 !smc_close_sent_any_close(conn)) {
287 /* just shutdown wr do 248 /* just shutdown wr done, send close request */
288 rc = smc_close_final(c 249 rc = smc_close_final(conn);
>> 250 if (rc)
>> 251 break;
289 } 252 }
290 /* peer sending PeerConnection 253 /* peer sending PeerConnectionClosed will cause transition */
291 break; 254 break;
292 case SMC_PEERFINCLOSEWAIT: 255 case SMC_PEERFINCLOSEWAIT:
293 /* peer sending PeerConnection 256 /* peer sending PeerConnectionClosed will cause transition */
294 break; 257 break;
295 case SMC_PROCESSABORT: 258 case SMC_PROCESSABORT:
296 rc = smc_close_abort(conn); !! 259 smc_close_abort(conn);
297 sk->sk_state = SMC_CLOSED; 260 sk->sk_state = SMC_CLOSED;
298 break; 261 break;
299 case SMC_PEERABORTWAIT: 262 case SMC_PEERABORTWAIT:
300 sk->sk_state = SMC_CLOSED; <<
301 break; <<
302 case SMC_CLOSED: 263 case SMC_CLOSED:
303 /* nothing to do, add tracing 264 /* nothing to do, add tracing in future patch */
304 break; 265 break;
305 } 266 }
306 267
307 if (old_state != sk->sk_state) 268 if (old_state != sk->sk_state)
308 sk->sk_state_change(sk); 269 sk->sk_state_change(sk);
309 return rc; 270 return rc;
310 } 271 }
311 272
312 static void smc_close_passive_abort_received(s 273 static void smc_close_passive_abort_received(struct smc_sock *smc)
313 { 274 {
314 struct smc_cdc_conn_state_flags *txfla 275 struct smc_cdc_conn_state_flags *txflags =
315 &smc->conn.local_tx_ctrl.conn_ 276 &smc->conn.local_tx_ctrl.conn_state_flags;
316 struct sock *sk = &smc->sk; 277 struct sock *sk = &smc->sk;
317 278
318 switch (sk->sk_state) { 279 switch (sk->sk_state) {
319 case SMC_INIT: 280 case SMC_INIT:
320 case SMC_ACTIVE: 281 case SMC_ACTIVE:
321 case SMC_APPCLOSEWAIT1: 282 case SMC_APPCLOSEWAIT1:
322 sk->sk_state = SMC_PROCESSABOR 283 sk->sk_state = SMC_PROCESSABORT;
323 sock_put(sk); /* passive closi 284 sock_put(sk); /* passive closing */
324 break; 285 break;
325 case SMC_APPFINCLOSEWAIT: 286 case SMC_APPFINCLOSEWAIT:
326 sk->sk_state = SMC_PROCESSABOR 287 sk->sk_state = SMC_PROCESSABORT;
327 break; 288 break;
328 case SMC_PEERCLOSEWAIT1: 289 case SMC_PEERCLOSEWAIT1:
329 case SMC_PEERCLOSEWAIT2: 290 case SMC_PEERCLOSEWAIT2:
330 if (txflags->peer_done_writing 291 if (txflags->peer_done_writing &&
331 !smc_close_sent_any_close( 292 !smc_close_sent_any_close(&smc->conn))
332 /* just shutdown, but 293 /* just shutdown, but not yet closed locally */
333 sk->sk_state = SMC_PRO 294 sk->sk_state = SMC_PROCESSABORT;
334 else 295 else
335 sk->sk_state = SMC_CLO 296 sk->sk_state = SMC_CLOSED;
336 sock_put(sk); /* passive closi 297 sock_put(sk); /* passive closing */
337 break; 298 break;
338 case SMC_APPCLOSEWAIT2: 299 case SMC_APPCLOSEWAIT2:
339 case SMC_PEERFINCLOSEWAIT: 300 case SMC_PEERFINCLOSEWAIT:
340 sk->sk_state = SMC_CLOSED; 301 sk->sk_state = SMC_CLOSED;
341 sock_put(sk); /* passive closi 302 sock_put(sk); /* passive closing */
342 break; 303 break;
343 case SMC_PEERABORTWAIT: 304 case SMC_PEERABORTWAIT:
344 sk->sk_state = SMC_CLOSED; 305 sk->sk_state = SMC_CLOSED;
345 break; 306 break;
346 case SMC_PROCESSABORT: 307 case SMC_PROCESSABORT:
347 /* nothing to do, add tracing in futur 308 /* nothing to do, add tracing in future patch */
348 break; 309 break;
349 } 310 }
350 } 311 }
351 312
352 /* Either some kind of closing has been receiv 313 /* Either some kind of closing has been received: peer_conn_closed,
353 * peer_conn_abort, or peer_done_writing 314 * peer_conn_abort, or peer_done_writing
354 * or the link group of the connection termina 315 * or the link group of the connection terminates abnormally.
355 */ 316 */
356 static void smc_close_passive_work(struct work 317 static void smc_close_passive_work(struct work_struct *work)
357 { 318 {
358 struct smc_connection *conn = containe 319 struct smc_connection *conn = container_of(work,
359 320 struct smc_connection,
360 321 close_work);
361 struct smc_sock *smc = container_of(co 322 struct smc_sock *smc = container_of(conn, struct smc_sock, conn);
362 struct smc_cdc_conn_state_flags *rxfla 323 struct smc_cdc_conn_state_flags *rxflags;
363 bool release_clcsock = false; <<
364 struct sock *sk = &smc->sk; 324 struct sock *sk = &smc->sk;
365 int old_state; 325 int old_state;
366 326
367 lock_sock(sk); 327 lock_sock(sk);
368 old_state = sk->sk_state; 328 old_state = sk->sk_state;
369 329
>> 330 if (!conn->alert_token_local) {
>> 331 /* abnormal termination */
>> 332 smc_close_active_abort(smc);
>> 333 goto wakeup;
>> 334 }
>> 335
370 rxflags = &conn->local_rx_ctrl.conn_st 336 rxflags = &conn->local_rx_ctrl.conn_state_flags;
371 if (rxflags->peer_conn_abort) { 337 if (rxflags->peer_conn_abort) {
372 /* peer has not received all d 338 /* peer has not received all data */
373 smc_close_passive_abort_receiv 339 smc_close_passive_abort_received(smc);
374 release_sock(sk); !! 340 release_sock(&smc->sk);
375 cancel_delayed_work_sync(&conn 341 cancel_delayed_work_sync(&conn->tx_work);
376 lock_sock(sk); !! 342 lock_sock(&smc->sk);
377 goto wakeup; 343 goto wakeup;
378 } 344 }
379 345
380 switch (sk->sk_state) { 346 switch (sk->sk_state) {
381 case SMC_INIT: 347 case SMC_INIT:
382 sk->sk_state = SMC_APPCLOSEWAI 348 sk->sk_state = SMC_APPCLOSEWAIT1;
383 break; 349 break;
384 case SMC_ACTIVE: 350 case SMC_ACTIVE:
385 sk->sk_state = SMC_APPCLOSEWAI 351 sk->sk_state = SMC_APPCLOSEWAIT1;
386 /* postpone sock_put() for pas 352 /* postpone sock_put() for passive closing to cover
387 * received SEND_SHUTDOWN as w 353 * received SEND_SHUTDOWN as well
388 */ 354 */
389 break; 355 break;
390 case SMC_PEERCLOSEWAIT1: 356 case SMC_PEERCLOSEWAIT1:
391 if (rxflags->peer_done_writing 357 if (rxflags->peer_done_writing)
392 sk->sk_state = SMC_PEE 358 sk->sk_state = SMC_PEERCLOSEWAIT2;
393 fallthrough; !! 359 /* fall through */
394 /* to check for closing */ 360 /* to check for closing */
395 case SMC_PEERCLOSEWAIT2: 361 case SMC_PEERCLOSEWAIT2:
396 if (!smc_cdc_rxed_any_close(co 362 if (!smc_cdc_rxed_any_close(conn))
397 break; 363 break;
398 if (sock_flag(sk, SOCK_DEAD) & 364 if (sock_flag(sk, SOCK_DEAD) &&
399 smc_close_sent_any_close(c 365 smc_close_sent_any_close(conn)) {
400 /* smc_release has alr 366 /* smc_release has already been called locally */
401 sk->sk_state = SMC_CLO 367 sk->sk_state = SMC_CLOSED;
402 } else { 368 } else {
403 /* just shutdown, but 369 /* just shutdown, but not yet closed locally */
404 sk->sk_state = SMC_APP 370 sk->sk_state = SMC_APPFINCLOSEWAIT;
405 } 371 }
406 sock_put(sk); /* passive closi 372 sock_put(sk); /* passive closing */
407 break; 373 break;
408 case SMC_PEERFINCLOSEWAIT: 374 case SMC_PEERFINCLOSEWAIT:
409 if (smc_cdc_rxed_any_close(con 375 if (smc_cdc_rxed_any_close(conn)) {
410 sk->sk_state = SMC_CLO 376 sk->sk_state = SMC_CLOSED;
411 sock_put(sk); /* passi 377 sock_put(sk); /* passive closing */
412 } 378 }
413 break; 379 break;
414 case SMC_APPCLOSEWAIT1: 380 case SMC_APPCLOSEWAIT1:
415 case SMC_APPCLOSEWAIT2: 381 case SMC_APPCLOSEWAIT2:
416 /* postpone sock_put() for pas 382 /* postpone sock_put() for passive closing to cover
417 * received SEND_SHUTDOWN as w 383 * received SEND_SHUTDOWN as well
418 */ 384 */
419 break; 385 break;
420 case SMC_APPFINCLOSEWAIT: 386 case SMC_APPFINCLOSEWAIT:
421 case SMC_PEERABORTWAIT: 387 case SMC_PEERABORTWAIT:
422 case SMC_PROCESSABORT: 388 case SMC_PROCESSABORT:
423 case SMC_CLOSED: 389 case SMC_CLOSED:
424 /* nothing to do, add tracing 390 /* nothing to do, add tracing in future patch */
425 break; 391 break;
426 } 392 }
427 393
428 wakeup: 394 wakeup:
429 sk->sk_data_ready(sk); /* wakeup block 395 sk->sk_data_ready(sk); /* wakeup blocked rcvbuf consumers */
430 sk->sk_write_space(sk); /* wakeup bloc 396 sk->sk_write_space(sk); /* wakeup blocked sndbuf producers */
431 397
432 if (old_state != sk->sk_state) { 398 if (old_state != sk->sk_state) {
433 sk->sk_state_change(sk); 399 sk->sk_state_change(sk);
434 if ((sk->sk_state == SMC_CLOSE 400 if ((sk->sk_state == SMC_CLOSED) &&
435 (sock_flag(sk, SOCK_DEAD) !! 401 (sock_flag(sk, SOCK_DEAD) || !sk->sk_socket))
436 smc_conn_free(conn); 402 smc_conn_free(conn);
437 if (smc->clcsock) <<
438 release_clcsoc <<
439 } <<
440 } 403 }
441 release_sock(sk); 404 release_sock(sk);
442 if (release_clcsock) <<
443 smc_clcsock_release(smc); <<
444 sock_put(sk); /* sock_hold done by sch 405 sock_put(sk); /* sock_hold done by schedulers of close_work */
445 } 406 }
446 407
447 int smc_close_shutdown_write(struct smc_sock * 408 int smc_close_shutdown_write(struct smc_sock *smc)
448 { 409 {
449 struct smc_connection *conn = &smc->co 410 struct smc_connection *conn = &smc->conn;
450 struct sock *sk = &smc->sk; 411 struct sock *sk = &smc->sk;
451 int old_state; 412 int old_state;
452 long timeout; 413 long timeout;
453 int rc = 0; 414 int rc = 0;
454 415
455 timeout = current->flags & PF_EXITING 416 timeout = current->flags & PF_EXITING ?
456 0 : sock_flag(sk, SOCK_LINGE 417 0 : sock_flag(sk, SOCK_LINGER) ?
457 sk->sk_lingertime : SMC_ 418 sk->sk_lingertime : SMC_MAX_STREAM_WAIT_TIMEOUT;
458 419
459 old_state = sk->sk_state; 420 old_state = sk->sk_state;
460 again: 421 again:
461 switch (sk->sk_state) { 422 switch (sk->sk_state) {
462 case SMC_ACTIVE: 423 case SMC_ACTIVE:
463 smc_close_stream_wait(smc, tim 424 smc_close_stream_wait(smc, timeout);
464 release_sock(sk); 425 release_sock(sk);
465 cancel_delayed_work_sync(&conn 426 cancel_delayed_work_sync(&conn->tx_work);
466 lock_sock(sk); 427 lock_sock(sk);
467 if (sk->sk_state != SMC_ACTIVE 428 if (sk->sk_state != SMC_ACTIVE)
468 goto again; 429 goto again;
469 /* send close wr request */ 430 /* send close wr request */
470 rc = smc_close_wr(conn); 431 rc = smc_close_wr(conn);
>> 432 if (rc)
>> 433 break;
471 sk->sk_state = SMC_PEERCLOSEWA 434 sk->sk_state = SMC_PEERCLOSEWAIT1;
472 break; 435 break;
473 case SMC_APPCLOSEWAIT1: 436 case SMC_APPCLOSEWAIT1:
474 /* passive close */ 437 /* passive close */
475 if (!smc_cdc_rxed_any_close(co 438 if (!smc_cdc_rxed_any_close(conn))
476 smc_close_stream_wait( 439 smc_close_stream_wait(smc, timeout);
477 release_sock(sk); 440 release_sock(sk);
478 cancel_delayed_work_sync(&conn 441 cancel_delayed_work_sync(&conn->tx_work);
479 lock_sock(sk); 442 lock_sock(sk);
480 if (sk->sk_state != SMC_APPCLO 443 if (sk->sk_state != SMC_APPCLOSEWAIT1)
481 goto again; 444 goto again;
482 /* confirm close from peer */ 445 /* confirm close from peer */
483 rc = smc_close_wr(conn); 446 rc = smc_close_wr(conn);
>> 447 if (rc)
>> 448 break;
484 sk->sk_state = SMC_APPCLOSEWAI 449 sk->sk_state = SMC_APPCLOSEWAIT2;
485 break; 450 break;
486 case SMC_APPCLOSEWAIT2: 451 case SMC_APPCLOSEWAIT2:
487 case SMC_PEERFINCLOSEWAIT: 452 case SMC_PEERFINCLOSEWAIT:
488 case SMC_PEERCLOSEWAIT1: 453 case SMC_PEERCLOSEWAIT1:
489 case SMC_PEERCLOSEWAIT2: 454 case SMC_PEERCLOSEWAIT2:
490 case SMC_APPFINCLOSEWAIT: 455 case SMC_APPFINCLOSEWAIT:
491 case SMC_PROCESSABORT: 456 case SMC_PROCESSABORT:
492 case SMC_PEERABORTWAIT: 457 case SMC_PEERABORTWAIT:
493 /* nothing to do, add tracing 458 /* nothing to do, add tracing in future patch */
494 break; 459 break;
495 } 460 }
496 461
497 if (old_state != sk->sk_state) 462 if (old_state != sk->sk_state)
498 sk->sk_state_change(sk); 463 sk->sk_state_change(sk);
499 return rc; 464 return rc;
500 } 465 }
501 466
502 /* Initialize close properties on connection e 467 /* Initialize close properties on connection establishment. */
503 void smc_close_init(struct smc_sock *smc) 468 void smc_close_init(struct smc_sock *smc)
504 { 469 {
505 INIT_WORK(&smc->conn.close_work, smc_c 470 INIT_WORK(&smc->conn.close_work, smc_close_passive_work);
506 } 471 }
507 472
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